REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce...

52
,c DEPaRTtd EliT sF f, g J q irBl!i:r1r: f ;; & LAII0i,ifr il AGEI{i g$iT DEPARTMENT OF FISHERIES AND FAUNA WESTERN AUSTRALIA REPORT No.10 AN INVESTIGATION INTO THE STATUS OF INTRODUCED TROUT (Salmo spp.) IN WESTERN AUSTRALIA By Dr. N.M. Morrissy Published by the Director of Fisheries and Fauna, Perth. under the authority of the Hon. Ron Davies, M.L.A; Minister fo! Fisheries and Fauna

Transcript of REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce...

Page 1: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

, cDEPaRTtd EliT sF f, g J q irBl!i:r1r: f ;;

& LAII0 i,ifr il AGEI{i g$iT

D E P A R T M E N T O F F I S H E R I E S A N D F A U N AWESTERN AUSTRALIA

R E P O R T N o . 1 0

AN INVESTIGATION INTO THESTATUS OF INTRODUCED TROUT

(Salmo spp.)

I NWESTERN AUSTRALIA

ByDr . N.M. Mor r issy

Published by the Director of Fisheriesand Fauna, Perth. under the authorityof the Hon. Ron Davies, M.L.A;

Minister fo! Fisheries and Fauna

Page 2: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

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88. iss 0

Page 3: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

^ ^ f f m E r r \ T m q\ , \ J I I T

I Introduction

II Distribution

lII

IT

(a) lreas coveretl by stocking activities

(t) w.t"rs il which trout occr:r

D istributioa naP

(c) ct:rnate

(a) r'row of streans

(e) water temperatr:res

(f ) Spaqning faci-lities

Aburd-ance

(a) An6J-ers' catches

(b) Sanplir€

Sr:rcaarlr antl Conclusions

(a) oistritution

(b,l Abundance

Recomenrl ati-ons ' o o

References

Appendix

Photographic Pl-ates

v

VI

3

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1B

18

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ao

39

39

4q

39

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)+1

Centre Pa€es.

Page 4: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

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Page 5: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

It is a-lso llpcrtant to conper': tne situaticn in Western Austrai"iawith the history of i-ntroduced- trout il Eastern Austra-l-ia. and NewZealadid" whe re tirere ltas b,).,ri];

(t) n" i-rlitiuf stoc<ing of sl;re:uas rhich il aIL these other fish-eries resu-lted in the establisbment of self-sust ai_ning wildpopulations of trout in the fatter half of the last centurv

( usualJ.y very mal-l l iberations, PO - 2OOO fry, were success-fuJ- ). tr'ollowed by,

(2) fishi-ng of hi6h quelity on relati-vely unexploited- stocks inwaters little interfered with by naa. .And in recent years,

(.r) fi"hi"e of grad.ual-ly declining quality, particularly ne ar largen p n J . r o e ^ f n ^ n r ' l r J - . i n n d r r a i n n w o r f i < h i n o r h ; / l a < + a , , ^ + i ^ n ^ fv v L r r J , l l J ] 1 6

habitat. This situation has started since the l99t s.

Ptrases (1) ana (Z) have been called, respectively, the accli.:natiz-ation and maintena-nce stages (lobbs '193-l). plase 13) ^ay be caffed thedestructive stage. Hobbs 119J7 ) tu New Zea-l-arid ard Nichol-t-s (1958) inTasrnania showed that releases of artificial ly propa6ated. trout had. oftenbeen c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established.,reproduce s atisfactoriJ-y. This situation exists jn N.2., Tasmalia, nostof Victoria aid N.S.W., and a srnall paxt of S.A. for streams. However,there a.re some parts of these fisheries which have had to continuously berestocked si-nce their J-nception because natural spaming is inad-equatesince survival- of fish is poor due to su.mner climate. For exaroplestocking is necessary in dams, fakes or streams where there are no feed-erstreams with suitable spawni:ng gravef. Stocking is aL6o necessar;r tomaintain fishabfe stocks i-n rnargi-nal areas whe re surviva.l- is poor, iI someyears, due to high summer temperatules. The latter is the case for streamsin western N.S"W., as l ,ake (1917) poi . r r ted out , as weLL as in western Vic tor ia ,and in S.A. These points become relevant when the l-atitude of the south-west,the altitude of the waters, a.rd the hot dry strnmer cfimate a.r:e considered.

A d-istinctlon between the grointh rate ard. d-ensity of fish is need-edin ev a,l-uat j:rg the success of the fishery in terms of angling benefits. Tomany a-nglers the captr.rre of a few Large trout per day is conparable withthe capture of many snall- fish only a few of which are just legal size.Trout in narginal waters where density is fi-{nit ed by sr.loner cond-itionsusually grow ertremely rapidly reachilg legal-size in a year or so. Incontrast waters in colder regions usua-l-l-y have a high density of fishbut the fish grow more slowly.

Page 6: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

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Page 7: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

MAP IIil9TRIBUTION 6 TROUT IITHEQUTH.WESTOF WA.

- SnFA^tS coNTAtMNA TnOUT/ taeae uug courArN te rtuur

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Page 8: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

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Page 9: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

Tabl-e 2

Gatch rates are taken from log book.d.ata supplied. by ar€lers (See III,a).tr'or an explarration of stream ordersee Fig. 2 .

rTvErn.. l

River Sasin

fI .Alba.ny Coast

fff DenmaxkRiver

fV Kent River

V XranlcLirrRiver

VI Sha.nnonRiver

1 llaychilicqr .Riv.2 King CreekJ Angove CreekI Good.ga River

( Blackcat Creek,)I KaLgarr Riverb bIIII t lee]<

7 Napier Brook8 Kirg R:iver! l,i.neburner I s Creek

1 Marbellup Creek2 S]-eeroa.n RiverJ Hay River4 Deruoaxk Rivex

1 Kent River2 3ow River'1 Franlclin lliver2 Gor{.on &iver

1 Deep RiverIleld RiverShannon RiverGardener River

Donb akup BrookTreen BrookLefrcy Brook

5 Bj€ 3"ook6 Eastbrook

Trouthe he

Ilighe stCatchnate

(No. ofTake ahl e

m i l e J

2 . 7

0 .04.0

o .0

o.o

6.O

/+.o

5.o

BronnTr:out

ow

1I

1

I

221'l

rl

111

J Meerup River

1 Warxen River

11

12

121

1

I222j

1

1 * )/ * )

I,ISTING OF TYPES OF -ITATERS

AND IXGEND FOR MAP 1

NaEe of StreanOrder

:

VIf Walren River

Page 10: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

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Page 11: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

rRi-ver Basil Name of Stream

Strea.raOrcter

BronrrTroutkesent

RainbowTrouthesent

IlighestCatchRate(No. oft ake ablefishrperMLf,C,,I

XfV MurrayRiver

Ganning -

SerpentineRivers

Swan-AvonRivers

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l0 Cypress Srook l11 South Dardalup Ri12 Conj urinup Creek I1j Banksiada.le Creel14. North Dandal-up Ri15 Gronins Brook I16 Fosters Srook I

I1 Serpenti-ne River Iz DIrK brool( r

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Page 12: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

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lloquT€u

+uose4d+noxJut.o.Ig

.reBr0rtr€3J+SuPeJ+s JO oEBNuTs€g Ja^TF

ETTE

Page 13: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

Na;me of D amBrownTroutPresent

RainbolrTrouthesent

TYFE 2

River Basin

HighestCatchRate(No. oftal.-eab].ef ishrpernour,i

''t .0

0.2+

4 . 2

4 q

1 6

SerpentileRivers

Swari-AvonRivers

SerpentineCaJining +

J Mundaring

\ srcKreyI V IC IO ITa +( Church-man I s Brook+

Banksiadafe0alc1ey

Mornington Mi-Ll

New irrigation dam

Br:rm I s

Scabby gully +L,efroy

Shannon Mil-l

Angov e

/ . . \ ̂l. al-/ Dmarter oams

a E C a n n i n r ' -q 6 h h a h t i n 6

Rivers

1,[ Munay River

Harvey

fuestonRiver

,lonneJJ.y J(av.

Warren River

ShannonRiver

Alb anyCoast

I

l ' * )- \ {r * l

rlr

( * )

1 <

1 1

8

7

1 0 .

+ Not open to public fishing.

Page 14: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

.oo.rauire11, .daqcue; <e.rq1g : r{+Jad

!-xer. eoq --- '4oo.rg -{1" ',{e1.req3 'sueu.peag : uo+Jaqued

--- s,JaoBEa sa+"olt (8Li-!ddaS tue,lts :ee;re -(rre q.13

.s-roo?eT pr,'" slr{eT T€Jn+eN (T)

: t1O-l!L!

Page 15: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

Types 3 and I us ualJy offer no spawning facilities for trout andraana6ement, i.e. period.ic stocking at about three year intervals, isnecessary as each year-class grows to takeable size ard is removed..

Type 4 waters are tu-rb id fa:n dams il tle dryer, hotter areas eastof the D arling coasta-l ranges. These da-ns were the basis of an extensivesales promotion campaign by the Pemberton Trout Board in the 1950rswhich, for cl-i-natic reasons, was a failure. Growth of trout is poor inthese dans arrd oxygen depl-etion may occur during the srmmer i'rr the bot-tom water d-ue to temperature stratification.

Type J waters axe either natura.l lakes or lagoons ne a:. the coast,or nan-made gully d.a.ms i-rr the ra;rges. Some waters of the former cfasshave sufficient depth of water to provide refuge from suromer heat fortrout. These occur in the l.lb ariy distxict, south of Pemberton ald on thePerth coasta.f plain. Yfith fre quent restockix€ introductions are lcrovar tohave been successful, e.9., i:r Deadrars l,ake south of Penberton a.nd- inLake Yanchep. Currently lal<es near.AJbarry, Pemberton and Perth have beenrestocked- a:rd will- be evafuated shortly.

The srnaJ-l maJr-mad-e daros of tJ?" 3 are f ound in the range s from Pertharound to Alb a:ry. Usuafly these are smaLl- d-ams on private fand. There isno doubt that trout do extremely wefl in these dams and that if trout arepreferred to manon the dams could represent the largest source of troutfor food and sport. Restocking is necessary because the trout usuallywill not reproduce natirrally.

Type 2 waters comprise water supply dams, not open to public an8lin8,and i-rrigation d.ans open to public mu-I t i-re c re at iona-l- use. The l.argerd.ams of i-nterest are s ituated. on rivers in the Darling Scaxp between the.Iatitudes of Perth a-nd. Bunbury (Map 1). Mund.arfurg, Cannir€, ad Serpentineare public water supply dams. Serpentine dan was buift in 1961 on theSerpentine Ri-ver which by repute had been the best trout angling streamin II.A. urrtil this date. Serpenti:re d.am contains Rainbow trout of largeaverag e size as determined from observations of spawnirrg in streams whichfeed. into the dan. The existence of s ome self-reprod-uc i:rg trout is aLsol<nown for Mundaring and Canning da-ros "

The irrigation d.a-ns Wa"roona, Samsons, Logue Brook, Harvey, Drakes -Brook, StjJIin€, md Wellington carr be rated in that order from contain-ing trout in abund-anc e at the present ti:me to not containing trout(Wellfugton). Drakesbrook and. Harvey have Waroona a"nd Stirling dams,respectively, upstream from then on the large supply rivers. Waroona,Samsons and Logue Brook have onJ.y very smaff streams entering them.

^ c

Page 16: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

--

"tl

.d.recg 3u11..re6 ar{+ Jo JapJoq uJa+s"a aq+ uo d^BB +noq€ o+ uoT}coJTp-t1.ra1sea ue u1 '1seoc +s o.,i\ aq+ morJ pu" ( SpS - t1) €ere +s€oc q+nos aq+

rnoJJ uor 1. aJ r r -,{1.rcq1.:ou E u-J asEarcuT (,(JenJqJJ ,(11cnsn ) q+uoul Jdulnns

lsa+1oq aq+ JoJ s a.m1e.radua1 JT€ ltrntuTx"ttr u€3N '+s€oc q+nos aq+ uo 'tTuo

saqcu! B spoacxa TT€Jxr"r JairuIns 'a^TsnTcuT roqo+co o1 ,tery uo.r,;: ;a1u1-r,ruT sTf€J uT€r eq+ ;:o lred .ra1ee.r8 eqJ '(-{ueqTY - Z|. uoTFaU pu€ 5}se^{-q+nos

- 9l. uoT8a6 ;o.;: s,fa,t.mg cT+€I!.TTc ) .raa1! ri;euua 6 or{+ o+ ra^TU d11arruo6 eq1rtroJJ +s€oc qlnos aq+ uo pu€ €aJ? .raa16 1a.re 8,rery aq1 'se9ire6 3u11.re6 eq1 uo

pa+€coT ar€ (saqcur CE - 6) -{1tsua1u1 untn:lxBu Jo 'tcoJ lsaqcuT Ot spaacxa

1no,.r1 jo uo-!+nqTr+s-!p Jo €aJ? oq+ ra^o Tfe.]uf"r l"nuuy 'rOC6 Molaqpa+"coT ar€ s{rreaJ+s aq1 -(11ens1 '+q8Taq sTq+ a^oq? asTJ spaqsJa+€ra -(ue q1g

pu€ dJ?cS 9u11..re q aq1 u-g slead auos q8noqlle apn+T+T€ |OOOI. o^oq? poq€-coT efl? sll€aJ]s T€TuuaJed Jo saqc+aJ+s aq+ Jo auoN '+s€oc aq+ Jo saTTu

Ot uTq+Tr,\ eJ€ srlear+s Jaq?o sTTrint +s?oc eq+ uoJJ soT-lln 06 +no qe sT "aJ€looMlic€Tq aUL. qC Ut1l ;t sapn+!1,.T uaaM+aq aTT sltrcaJ+s aq'l fTV a"'

e+€nTTC (c)

',{ue qTv Jo +s€a lsnf suea.rls

11etus -{,r a,r qltu .raq1a3o1 -{ueq1g 1e saTJ€+nq-IJ+ pu€ sJa^IU ue8a41 pue

3u-Dj ar{+ a.re 'ecuel.zodlllJ u-! +s€aT pue 'r{TprTq+ puy 'sualsds Ja^TU uaJr€1l

pur- ,fllarruoq 'poo.u1ce1g ar{} 3.-re a.raq1 ,{lpuocag 'suals-{s .:arl1g ,fe'r"reg pue

-{e;.m1q 'aulluadJas aq+ u1 f,aa.reg pu€ r{+Jed uaaid+aq sJncco sueaJ+s +noJ+Jo uoT+€rluacuoc +saT^€aq aqJ '(Z aTq€I pue t d€W) 1no..r1 3u-tu1e1uoc

(soTr€lnqTJ1 pue s.ra,r1.r) sral-€,l l. ad,{1 go s€aJ€ uTeu aaJq+ axe aJaqf,l

'(L a1e14 aes) s;a18ue o1 uo1-+cEJ++€ Jaqlor.rE sT auTTaJoqs aq+ reau uolleie8aa pauirloJp aq1 ur 3u1pao.;

qsTJ Jo .,{1ta11ce aqJ 'tlsTJ Sutno;8-1se; Jo {co+s +uaTlacxa u€ papr^ord

s€q ILe( €uooJ€1t pa111;:-d1,rlau aq1 's.rea-{ o,{!+ +sET aq1 u1 -{ge1tu-rg

. (ra+€t aos ),uo1s ,{1aa11e1al st uou qsTJ aq+ .;:o qp,ro.r8 aq1 9u1u s1.;t JoJ +noJ+ Jo sJeqmnu

alenbap suTe+uoc IT-F+s )iooJ€ angol qgnoqllg '1e.zeua9 uT sJa+€lt +noJ+ Joar\T+€c-!puT sE,\1 ueo 4oo.rg an3o1 1eq1 uolssa.rdur ar{+ pauTeS aJoJ€Jaq+ aH

.+noJ+ aFJ€T Sulcnpo:d pu€ uo-t+-Fstrer+ s-Iq+ Jo saFels .{1.rea aq+ uf s€rlueo >{ooJg an3o1 "y',q pa+TsT^ sTocu€Jd 'J( uaq,\{ E96l al 'sauTT.,Joqs oq+

3uo1e slre1d 1ua8.raua Jo q+MoJB eq+ ,i\ oTT" +ou s aop ir/vlop,lr€Jp T€ntrue aq;.I€TJe+€in llrpTd ar{+ ;:o acue,readdesTp oq+ o+ anp suos€as T€Ja^as Ja+JP

+noJ+ Jo a1e.r qluo.r8 uT as€aJcop e .{lqeltaaur sT aJaq; 'sTJqap }u€TdSuTsoduocap aq+ uo pes€q suT€qo pooJ a+€Jqa+ra^uT Jo tllroJ aq+ uT +noJ+

JoJ pooJ +uepunqe o+ speaT T€Tra+€E +IreTd tETJ+saJ..:a1 .1o 8u1u,lto.zp aq1

(L96v ut u'e( €uoor€t! Pn n& uT uBq {oorg anSo'J '3'a) sTtTJ +srTJ ad.{+sTrll Jo uep € uar.1!\ .Ja?€i4 JoJ spuanep Jalnnns 01 enp 'uunlne o+ 'TTnJ aJE-{aq1 uaqu (guTrds pu€ Je+uTrlr ttroJJ Ta^eT Ja+e.n uT do.rp -(1.ree.{ a3.re1 -{.rarr€ sT araqJ . orrlr+ +sJrJ aL{+ JoJ Sultt'F.l .ra1;:e s.rea-{ iral +sJTJ aq1 Surtnpprre ,{lleuoseas qloq saSueqc euar+xa o+ +caCqns sT uep Jo 3d.q sTrlJ

Page 17: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

TABLE J

AREAS, ANNUA], D ISCHARGES, AND MINIMUM SUMMER I'I,OWS 0r. SOUTH 14EST STREAMS'

1 acr.-foot = 41r5ta cubic feet Cusecs = crrbic feet per second

I

StreamAREASquareMi-Ie s

ANNUA], D ISCHARGEACIE 3'NIT

MIN]MUM I'],01{&ate for 1962GUSECS

AV!XAGE TOe 1962

Dwel-lirigup 3r. nastDwellingup 3r. NorthBalingup Br.Bol-gaaup DanTr:rtle Br.Li-nebuxner Cr.Joshua Cr.Bolganup Cr.Scabby GuJ-lyLogue Br.Davies Br .Gooralong Br.Joshua Cr.Yarragil Br.Gingin Br.Ihonson Br.Ferguson R.Brulswick R.Wongong 3r.North D a"ndaluP R.L,efroy Br.Capel R.Harvey R.South Danda-lup R.Harris R.Wooraloo R.WiJgaxup R.Margaret R.C alining R.heston R.Cof,lie R.Kent R.Donnelly R.Wanen R.Fran-klard R.Murray R.

o . 1 5o..3oo;12

2 .241 . 9

4.48. r Z ' 7

16,619.5229J9t$45trD

51@

12012.71tio1 91 5 51 6 61681BOzOO23O25127 '300

1\30152O2720

141t+281632289e3W821+3J1

11281143087227990

3t+]877828184

18o4O29592162027 3trD51190413101l+110268\039m16200

__ : . ^,t>rJ-)19100518804aJoo59300

1381002673OojD19ourono

6 , 9) , o . r

7-7-7

51086

111121t+3@+t 10@7838\5t 'r a-t

I ) )o969

13700

17760lB5tp50440372@89@

2611019910169m28720,+53o175(p529201299058fo

226300BB7@

1321oo

136U+8

0.004

000 . 1 0a . t 2000 .09t+.6

0.04-00

000.,+o .37o . 5+.5

o (d.an)1 . 000

0u !dan/

u \aam/a R

1 1 . 519.61 . 0

13.6

1l+.

Page 18: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

l

"61

(t aTq€J uo Pes€q). +noJ+ JoJ,(1111qe11ns o+ uoT+€TaJ u-T ScT+sTJo+c€J?qc UreaJis

't '3-r,[

gz-7tN lAvno?V]AV J-N]WHJ-LV)

=

SIr o*D\ *-_Cr C-l)>.\rn+\*

H; ac)n

ooo,

!aolJta e1g vttogNn swwvlg o

sYrgunNta-lN|YU oJ. rN,l"q,t9

dvrnbt| btttytytalXtoe lLnou- ,Nt Attc2lo tlgytYt gwvtrvlg @

lnout ,tuAtNYc shtvttltg a

o

oo:Z' o

O9

.€

q.€:

,/.

t.5

o

aO1

Page 19: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

TABI,E 4

lIATER TB{PIRILTIJRES FROM D]RK ANDMcKNOn BR00K 0VER TIIE PERTCD DECflIBER

10, 1958 to JANIIARY 2+, 1969.

STREAM PI.,ACEIY.MXR. TSEERATTTRX (oC)

Ilaxi.roun

D IRK BROOK HE,ADITATER

GORGE

PI,AINS

)'t . )

^ ^ ^ oz 6 . u

15.Oo

15 .0o

15.Oo

MoKNOI BR00K HEADIIATER

GORGE

PIAlNS

20.oo

23.Oo

^ , - o.+. )

&.50

.r t. no

15.Oo

15"

Page 20: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

J Uv

a Lt

o'zLo'Lr

o'51

. trwJotrufruvmgluf

x00us grrl\I Er00ts flrs

/a8lTJq suosduour'\ \ .. *'tg rou,{ET

/'a8rnJq s.rretnrco.:ql \"*.T NEITEVI{

(peou UTBW)r00us douvflYq

(.U uerrer[ o+ esoT3)x00us Nusufi

1e8m.rq suos duou,r'\I00Es .f,ou,{sT

fiNfiINI'TIlWrrvirl

(c^) uunwuarw,r usov.&

. (co6'8) ,{ozt ,{o ruutrNrr{0J (r^l'tf) ,[^58 ,flo"ru]I/\Ilrvft y ri[or,{ 6riNw No,rusrEld -w (,{^ ) -sunJvuudEr

urv 'rEJSrs NE&ryfiflfi lu 595tr 'BZ trf,vougu.{ of 81. rwntss,{ cOrusd

sHJ UUAO S SrlOffugdl6f UUJVA

9 srsvi

E'+t,

J Zv

o'9,

IUDIINI!'I

( co ) uunuvuuluur usfiYll

(c^o'5) s^gti ,{o luu[rNrol v or(coE'tt) dolor".{O wnydxv\I v nou,{ @riNvlr Noruf,s}I[d

w f,tm[vusdrr'tfi,I EJY ']Ioouri dowirlvcqNV IOOUS NStrUJ 'I00Eg -f,OUrm'I

l,[ (595t 'zz trEvnNVf or 'gg6L '51- uuflwcsc)S$tl0fiftlUflmf UEJYII E],{ftOS

0'Bt:7 uv

Y tJ}

:7 av

6'zz

a 2c

9Et

Z

L

o" 6z

E'zz

9'92

?-dtdffi

Page 21: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

Daily maximum air teuperatures exceed 1OO"tr' occasionally dr.rringslxn,ner, the frequenr:y of occurrence increasing to the north and east.

The areas of the South-west where streams contain trout are ttroser . , - . i r r i -o tha fnshost ra l r , fa- I l ad I owest sunner a i r tcmpcraturcs; Lhcdetermining frctorsof l arid forn axe a-ltitude a.nd ,listance from the coast

in the path oi the prevailing oceariic airstreams from the west.

(a) I low of Streams.

The maxjroum flows of streams in the South-west occur during winter.In contrast to the winter floods the summer ffows of these streams(those considered worth netering by the.Public Works Department with a

view to future or present water storage) are extremely low (Table 1!extracted fron "Hydrologicaf Dat:r to tire 1962 Water Year"). The arrrual

discharge of these stre.a;ns is linearly related to catcb-ment area. Streamsl-ocated above tlie trend line are more likely to maintain a srnaff flowdlLrinp suflner and be suitabfe for trout than those below the trend( r i s . i ) .

( " ) Water temperatures.

fn stre rms subj'ct.d to high sunmnr daJ,'Lj mF air tempcr -,t-rres troutr-rre much more likely to survive if thcre are deep pools where temperaturcstratification, with depth, is sufficierrt to mairrtain favoruable temper-atures. Large turbulent ffows wifl not pernit stratification. Al-1 that isrequired is a smafl flow (or a s,;fficiently large d-eep pool with flow

absent) to naintain the pool deptir.

Temperatures betweerr about 2i to iOoC rrc-ve been found to be lethaJ-to treut in S.A., dependlng on the duration of erposu.res (several hor'rsat 28" and z ar.r hour aL fi" ) and the water tenperature s pre'riously

exper ienced.

Tabfe L shows the extremes of summcr water temperature fourd il small

tributaries of the Serpentirre Rlver and Samsons Brook. These streams con-

tain s eff -susti.i inilg populations of trout (see lrter). They flow through

thc most favoirrable arcas of the DarliriS Si:'.r'p :urd i,n the Darlirrg RargeX[c1{noe s Brook is very rvel1 sha,1ed by ji"ra}r i 'orest whil e Dirk Brook also

has tree shad.e afor€ its fer€th (Plates 2 ancl J). Ext:ept orL the plains,poofs are too s l ra l fo , r to pcrn j t temp r i , ] r , s t rot j r jca l ior - (a min i l r rm of

I t i " t t " " " " " r t y ) .

Thc period of mc::.surcment of wtrter tempcri.itures irrclnld several dt{y's

whcn the n;rxinlm ai.r tcnperature lrr Perth rc i.|che(i 1O9-!'. Theso heat-wevcs

ere ref lectcd il tltc rni,>:imlm lvater t,lmp cr atr-rrr: s rvhi f e thc rnirri.ma tr(l

re . rched ovcrn iSht dur i r rg cool per iods.

. A

Page 22: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

"61

JnoT^€r{eq s1q;, 's9ul.rds gr" sureaJ+s T6ens q+Ti Ja^TJ aq+ Jo socuanTlroc aq+

+e aleSa;8r.roc o+ ?a^rosqo uaoq al€q Jo^TU uaJJe1\ aq+ uT +noJ+ o;Ja'I

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n6\.lZ '(acejffs)o1'l-Z .696Y '1d ^.renrqad uO

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.s+uauoJnsEau cT+€Jra aae3 .ral1.r aq+ Jo ^i\oTJ aq1 q8noqlle ..zal1g

uarJElr^ aq+ uo lood ? uT punoJ s€lt uoT+ecTJJ+"J+S aJn+€Jadual auog

.Jo]\Tt rraJr€.li\ aq+ uT Jncco so.m1e.radua1 Jauuns T?q+aT +€q+ t{oqs TTTM

9 aTqef o+ 6 aTq€f uoJJ s aJn+"Ja dua + >looJg '{o'r.;:a'1 go uos-g'reduoo y

oe..!Jo

-soJ +saroJ TJJ?>I asuop e q8no.rql pafioTJ +T s€ >{oo.1g 3Tg aq+ uT paJJncco

s a.rn1e.radua1 +sanoT '(9 alqe; ) .ra.rr.1.r uT€u oq+ o+ fre+nqrJ+ acrnos €

uoJJ a.rn+€Jadua+ Ja+€M rrr as€aJcuT oq+ iaoqs t6961 .rarnuns a1e1 u1 po1'rad

JaTooc € Sut.rnp ualsifg uaJJ€llrt oq+ ur sa.mle.radua+ Japrh Jo spJocog

. (n[o++oq- ,zt\^6'61 pre '(r9)^5'6t '(,t)^o'oz '('€) ^L'zz'(,2) ̂68'zz'(,.v)

^s.q)1(9i"ior") c^do'i? :"o1;)' ifisrrs e'q+im'1ood ddep e"\rr 6961 392.f,.renYqag uo .u.d q1'q \e sa.m1e.radua1 re+€^a SuTnoIToJ aI{+ potllol{s uoT+€c}JT

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-a8p1.rg +E ro^Td pootDlceTg aq1 3:o.r(.re1nq1J+ TIPus e '1oo.rg dn"r€8Te(

.8u1dund a^Tssecxa .,fq paddols sT r{oTJ 3q+ uaq-f.l (L9-9961 Jo;ramns ) Jncoo o+ u.rr^orDI oJe soTlTT€+Jo[ sseu '.lalano11 '(E a+?Td) +noJ+

,3:o uo11e-indod agJ?l e 6.ra1e1 aes ) pamoqs 8u1qs1J-or+oeIo TnI? +sa,'l!-q+nosaq+ uT sueeJ+s 1no.r{ lsalooc aq+ Jo auo -f,1qeqo.rd sT >iooJg uoaJ;

. (+l a+€Td) sJauuts +soltrSrrlrnp {ooJg .f,o.r.3:e.1 aq1 uT pa^Jasqo eJe sq+€op l?aH 'a^oq€ se ?oTJad aues

aq1 8u-r.rnp €aJ€ uo+Jequed eq+ JoJ sa"m1e.:adua1 Ja+en slroqs E alq?[

'raql€ai,,t 10q 8u1.rnp s'poTJod +rogs JoJ

8utdund.,{q pedclols sT i'roTJ ar{+ uar{il {ooJg }iJ[O uo Jau$o prreT ar{+ -f,q 'raumns

qcEs usAs ,f11ensn a.re qsTJ leap 'os ua-6.g 'sa+€II4Tc JaTOOC uT AJOql AsTa

r{sTj Tr€q+ .,t1geo11aua3 3sa.m1e.radua1 Jo+€11 altroJ+xa o+ acue-+sTsar .raq31q e

p"aot"lt"p areq '"y'11 uT ?a+€TosT tlno;1 aq1 +eq+ snoT '!qo '{1'r1e,3: s1 11

.{ooJB )1JTC u} sam+sJodna+

.ra+€^{ Jalimns oseq+ pa^T-&1rts +noJ} +?q+ ?a^{oqs ft1qs1.1i-o.r1ceTg '€aJe sTq+

u1 suollelndod gulcnpotda:-JTes +saq aq+ Jo auo s€q {ooJg {JTO eTTI{n4tdrecg 8u1Feq aq+ uT ltrear+s +saTooc aq1 r(1qeqo.rd sT {oo.Ig s aoTDlclil

Page 23: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

r

3rg. 2.Dia€ramatic 8u.Brtr€rf,r of the generaf physicar characteristics

of strea4s"

20

LATERAL PROFILES

-]r-V\-/

VERTICAL PROFI

)n,, 'n P(NLs'Lort FLows n\rv rrrupsnnrrn E srwT,F,cer*,r,t

MEANOERS ON TITE

SUMMER SURFACE WATER

UNFAVOURA6LE

.. WA|ER TEMPERATUqES FORTAVOURABLe TRouT

Page 24: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

'(8 n+€Td ).rf\oTJ riloT Jo sa0T+ 3u1.rnp 1no.:1 .f,.r.rec qclqu s100d daap e^€q suesJ+s

aq+ +€q+ os ,t11e:a1e1 Jo pBa+suT "f,11ect1.rea po+ra^T? aq o+ spue+ sJa^TJasaq+ Jo .:a,v,od 8u1po.re aqI '(1 puB 9 sa+€Td) 'Ja^TU SuTuueO eq+ uo uo{€+

sqde.rSoloqd uT u$oqs a;re med.rls e 8u1uap1ra Jo s+Tnsal 3q+ Jo sTduexa TrV. f a+Tra+€T ) laae.r8 ace,;:ms +ueptmqe qlpa ,trlmoc q9norq+ uo13 t.{1;e1nc11led

' sa8u66 3u11.re6 aq1 u1 'suee.r+S 'Ta^Br8 TT€us Jo uoT+Tsodap +TmJad +ou

sao? n'loTJ Jo+uT-t'r Jo qsnJ pa+€J+uecuoc aq+ aJaqfi sueaJ+s noJJeu u-T s+TnsaJloTJ /r^oT Jo suosees 8u1.rnp uo11e1a3ea 4ueq Jo +uafiqceorcuo aqtl

.[oTJ Jalrmns -tao1 ,Lrerr e q11,t"

srrreaJ+s Jo cT+sTJa+ceJ?qc sT uoT'iTploc sr-q;, "TnJT+uaTd +ou sT osT€ TaAerFSuTurueds saTrB+nqTr+ asaq+ q[ 'saTre+nqTJ? TT€ns o+uT dn 'suTer +sJTJ

aq+ q+Tj^ 'a1e..r81m +snu qsTJ aq+ pue saT+TTTOeJ 9u1u.meds ou a^€r{ smeor+s.ra8.re1 aq;, .pi;.r.Teez naN Jo €TuEItrseJ rrg su"aJ+s u1 luas a.rd lale;r8 Sulu,vLeds

Jo saqc€al p51ua1d aq+ 3^€q +ou op +sarl-qlnos aq+ 1;:i sllleoJ+s +noJJ

. s oT+TT-T o"J 8u-tu,taedg (J)

'z '8-TJ uT 'pazTJeuuns eJe 6cT+STJa+C?J€qc asaqJ '+noJ+

a.rreq .{eu qcTqfi saTJe+nq}J+ aseq+ fTuo sT +I '+uapaca+rre a.;re osle e8.:o8aq+ uT Jo su1e1d aq1 uo sJa.tlTJ 3r{+ u-Toq q crqil saTJ€lnqTJ+ JaTTEUS

.uoT+cas o8Jo3 aq+ uT Jncco.r(aq1 .rarrl.r ar{+ uT IT€1e luesa.rd aJe lnoJl JT raTTrll'[ tsaqceal Jaddn JT 3q+ u-T +noJ+ a^€q SJ3^TJ

esaq+ Jo auoN .suTeTd aq+ o+uo 1no Buluado a8aoS eq1 uT .rrrcco s^loTJ

+saq pue lualpre.r9 lsadeals aq; 'seftreX SuTTreq aq1 q8nolql ?Jen +s auSuTi oTJ srrearls uT aTqeacT+ou .{1.re1nc11.red 8T sTqJ 'sar{oeal aTppTu JTaq+uT s.moco ts.rale,nlreaq eq+ L! SuTJJncco Jo Itea+su-T tsJoITJ asaql ,;:o e9e1s

,,Tng{+no.f,, +sou aT{+ sT +Eq+ tsmea.rls +uapoca+ue ele tue.r:eg ptre rfTTouuo(t pooru:1ce1g ',te.r.m1q aq+ 3 '3'a '1s e1tr-q1nog eq? uT sJo^TJ a8.re1 aq6,

/.rrr[1 G.2L /'xeu] ('nz 8ut..rds \'/n-"_\1.l-":('uTu) ;O'Bt ('xeu)-oo'Ez ra^Tu

"695L , LZ ,(.rerurqag o+ €Z rtr".rltxe | ?oTrad eq+uT apeu aJa-u suosT;eduoc a.rn1e;arIuol SuTi[oTToJ eq1 3;ra1eu 8u1'rds ,;o ato1,;;-uT ar.l+ u-t 3u1if1 pa^Jes qo aJail qsTJ a8.reT .frrem aJaqjl Jor'Tll uoJJ€1 oq+ uo

lods euo 1y ..rt11arruoq Je$oT aq+ s€ qJns suleaJ+s e8.ra1 .raq1o uT sJncco osTe

Page 25: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

TABI,E 7

REFERENCES ON TIIE ABIJI{DANCETROUT E],SEWIIERE

Data from New Ze aLand given by

Allen, K.R. (lgSl) tyu Horokiwi Stream

Sngl-ers

N.Z. Marine D epartment, Fisheries Bul-l_etin No.10

Size-U-mit of 11" (27.9 cns), fl-y fishing only,avera€e of 10 ye a.rs data.

catch (takeable ) per houravera€e size

fi rurd.ers ized. fish

Sanpl-ins

total populat i"on !b/ acre

Allen quotes the foll-owing figuresthe U.S.A.

New Hampsh:ireMichiganNew YorkCaLifornia

o .61O.91 ] .b s.12f, inches))z cms. )E E F

= 237

for density of trout in streans

- - - - - /)r. / rh/ aETe

1. \ - 96 .913.8

t -

It

Ln

nnfished. 214 -fished. )1O -

4341\6

Data fron Eastern Austratia given by

L,ake, J.S. (lg|il. Trout populations and. habitats in N.S.W.Aust. Jour. Mar'. Freshw. Res.

g, (t*), t+14 - 49

Arrqlers Size f imit of 12", single season6/o of creel censuses returned = J

Group( warnh.gh

Nunber oftakeable fishcaught per hour

Avera6e size oftakeab]e fish

( lbs. )

1 Group 2watergrowth rate)

cree] census

9"oY! J .lcoJn walerpoor growth rate)

o . 1 7

2 t t / t 5

o.25

1 11h6

o.3e

t i l t 6

22"

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'uotpas €5ro9 :)ool8 s,loN)rw

z lrvld

'sj€t6ue ,ol rslpa aqt ol ssarte Ise. a'{+ aloN outr6u:rdr aqlur uorrets6a^ Pa6raurqns ra^o 6ursrnr> ar€ qrrq,tt qe9 6!'tu or 6u"15lJAll :wvo vNoolvM

I .Vld

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rI

II

IPLATE 3

DIRK 8ROOK. co.ee Seci ion.

LEFROY BROOK: Sampl ins s€<r ion.

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9 trv td

uer tnorl araqa spaq ta^er6 Jo sarras e olut '1)l3rrs aql Pourorsue4 'eq Inq Inor{ ro, rer!qP'{q)larls srqr Pa^orlsaPseq 6utzoPllnq lq ure€rrs oqr,o 6u'u€Ptl :ll^ld 9NINNV)

'uo!r)as 5u'tdueS ')OOdS NlldI

s lrvld

I

ll

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PTATE 7

CANNING RIVER, A stretch of l t ream belowthar piclured in plate 6. The.e is no spawn.ing gravel and rhe r iver is compar. t ivelynarrow, deep and rap:d in flow.

PLATE 8

SOUTH DANDALUP RIVER: Spr ingt ime f lows in the deep pool in the fore-sround and rapids inthe backeround. Note rhe heavi ly overgrown banks.

Page 30: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

F- I

'ez

.ofie/sqT 6LLELlI

- Brr- 569 a1-ru.rad qs;g

.sueaJ+s +noJ+

,{+TsuapJO Joclrtrnu

TT€us ojn+

sorlcuT z. I Io.€

qsTJ Jo q19ua1 ueanrr{ep .rad r{srJ aTq€a{e+

Z. LOZLrTl

ruTTdmes

Jo roqrtrnu e8e,ra]ry IE6L _ E\6L

,,5 +TUTT azTS .sra^Tu +"""_q+"oN__

sJaTFuv

6E - 6l :(l) % .sad .nqsard ..r€Irl .rnof .+sny

uo33e6 1sa4-q1roN oq+ .;o ,t;eqs rg eq6 11,t:aqs1g +noJf u€Tu€ttrs€f arlJ

(BE5t) 'e'y sTIoqcTN

](q ua,|!T8 errreurs€ J ltroJJ ?+€q

erse/sqI g9 -+r? ?rr€luo l (ZE5t) qcTrr€Je+S

arae/sql oifF I r.rpSTr{cEt (6e6L) ttezzell pue ra++aqs

erc€ /sqT OOe - O 'sueaJls +noJ+ JoJ egwt ,(e6.0651_) *apuel.reg salonb

arcB /sqI €6 _ ZE.{11suaq

ue1 s,{g .raalg )tsg q+roN

@Tdto-s

." * ."o*.""{ t""; !n:;<t1,3 .r{sTJ pes€elal Jo T€rTlJns eq+ ?tr€ uBer+s +nor+ " Jo uoT+€Tndoal aT{J (S65t) .e.y .s11oqc15

fq uoriT8 eTu€rtrs?[ uorJ €+€O

.A - 99 6tL - +O . tLt-+t\ (eroe /qL) f+Tsucp

Jr.rrTdrrPs

pezTsreprm %

5'oL --

Page 31: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

r-Data fxom Tasroania given by NicholJ-s A"G., (1958)

The Tasmanian Trout l5.sheryJII The Rivers of the North arrd. EastAust. Jor:r. Mar. Freshw. Res. !r(2): 167 -19O

Anglers

South Xsk River Systen(1O years data)

Average numb er of fish per d.ay 2.4 - 4.1

Avera€e m:rnber of fish per a.ngler per season 13.9 - 56.8

Average size of fish 11.7 - 15.6'l

North Esk River Systen(10 years clata)

number of fish per clay 1.8 - /.O

number of fish per argler per season l+.O - 7J.2

Average size of fish 10.7 - 12.2"

( size lj-mit 9" )

Data from New Zeal-ancl 6iven by

AJ-Ien, K.R. alid Cr:ln ingham B.T. (1957 )N.Z. Ar€ljrg 1947 - 52Resul-ts of the Diary Scheme.

Anglers

Range for various d-istricts

flotrrs fished per alay 2.15 - l+.ltO

Number of fish per bow O.J9 - O.97

Fish per argler per season 1l+.7 - 69.0

Number of fish per d.ay (trip) 1.2 - 3.6

Data from Frost, It.E. & Brown, M.E. (1967),fhe Tlout, CoL1ins, Lordon.

Density of trout in streams

Two small. streams flowing into lake Bllesmere, Tasnarria 4O -

Ilalla Brook, Dartmoor 5 -

Thego River, IGnya 1l+OSagana River, Kenya 2OO.Kiringa Riv.rKenya fished. 36tKirirga Riv.rKenya unfisheil 129

135 Lb/ anre

20

24.

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s+ueToTJJooC uoTssaJFau pe+€TncT€C j.

VJYC X00S eoT tryzruwuj|Ios

E"E-mi

VNLOVsl/\Ivq usHJo

\ldWVq VNOOUYil

zzY9L",SMEdJnSIUJ

Lz9*26 <)SdSTUU

JnoH JadpaqsTg uaar+s ;io

SRI€tr JO JAqENN

- ({r"r)^?q Jad p€r{sTd

sJnoII Jo JaqunNra+€ll

(")

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III ABUNDANCE

/ - l A - ^ r ^ * ^ I ^ ^ + ^ L ^ ^\ 4 / l a € { q f D

A l-og book system was used during the 1)6-l -68 fishi_ng season toprovide data on the success of anglirg. In August, 1967, 94 log-bookswere distributed to anglers and a request for the returri of the bookswas made in l:tl,ay 1968. Iogbooks were mairly sent to the arglers ( about/0) who , rcre enthusiast jc enough to at tend the inaugr l l l rect i -€ of theW.A. Trout ard Freshwater ArglinE Association in early Al€ust, 1967.No logbooks were returned in 2/ cases, logbooks with i.rrarlequate duta,or replies to the effect that no fistring had been done, were receivedin 2l cases, and p books with usabl-e d.ata were recelved.. There were15 fogbooks from anglers living in Perth, 16 from the country townssouth of Perth down to Harvey, / frorn the Penberton-Brid-g etown ar.e a and4 frora AJ.bany.

The forn of the log-book sheets is shown as Appendix I. Thc rawdata were su0ma-r'izcd by a couputer prograrrme.

T , , n , , f t h n q r r m m - r i z n r j v q l r r o < n f n , . l , . h n o r n i l , . P f ^ , t i . ^ , ^ n - hv r w ! } / r v P v r

n a F s n p . l . i r a r - f o r a h ^ a s ^ n t n c a b r D d a n c c o f t r o u t i ' a s m o : s r r o , l h n i h h vu v L r r v . y

angling and research sanpling) have beerL extracted from the literatur.eand presented in Table /.

W.A. log book data have been surnrnar i .zed for . " r ivers" ( s t ro:m order. - - i lowing onto thc p la ins) "Lr ibutar jes" (s t rcam

o r d c r I o r g r e a t e r ) , W a r o o n r D a m a n d " o l , h n r d a r n s " . ( t a O t e 8 , ( 1 ) - ( c ) ) .the places providing d"ata are indicated in Table 2 by a value for thehighest catch per miJe (s t r , 'ams) or hour (dan) of i ,akeabfe f - ish (greatcrthan 12" fork length). Twenty " tributariesrr a.rx1 .14 "rivers" were fishedby arglers returning log-books.

Alg lcrs f ishcd for '1 .B hout 's per day (or_t r ip) on sm'rL l s t reals arrdf o r 2 . 8 h o u r s o n r i v e r s , c o v e r i n g a b o u t i t o j o f a n i l e , ( T c b l e B r l a ) ) .It shoul-d however be pointed out that alglers fish nost streams here ina hlghly selective nanner because of the overgrown nature of the balksard the occurence of fish usuafly onLy ih the deeper pools. Thc strearls not waded ald thoroughly fisherl. Fron past experi.c.nce, the angJ.ermoves rapidly from one pool to another vrithout fishing the intervcnilgsha-lfow water (this is gcr-rerally not possiblt:). Alglers were requested-+ ^ - ^ ^ - a + 1 - . t , . . , . + L ^ c ^ + - - ^ ^ l , , ^ r ' lou uu4rJ

Thc proportion of Brown trout to Rainbow trout capture,L was Iow,h e i n a n i c h o r i n s m q l l < * n . r m c i l r ' , n i n . i " . - . / T - r. - , . , - \ - - J l c o , l D , r n l l | ' r l / .Brown trout have not becn sto:ked in strr:ams il recerit yoars; the Pcmbcr-ton Hatchery considers th.'t Rainbolvs are e.lsicr to raisc.

? 6 .

Page 34: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

. L(,

.r.rpau 3r-{+ Jo JoJJa pJ€pLrE+s asolJua sosaqluored

( ot 'o) ot?'8

9Bv

('do'o)\z'I

/ L n. n\tq' n

0'0E. aL9'zL

tv

610!

.ra18ue .ro d uor1e1qsg.; .;o 1q3146

(sqT) uo{€+qs1,1 j.q8ton 1e1o5

( drr+ ) ,(eP radqsTJ oTq€o>{€+ 'oN

a1lu;rodr{sTJ alq€a>i€+ 'oN

.moq :adqsrJ 3Tq€o{e+ Jo 'oN

:rauulds pir€ +T€q;auulds pue ,11;i

,.rarrulds+T€q ?-- I\ LJ

% 3"+,I"1I Jo ?oq+aul

MoqITeJ 1\tuoJq %pazlsaaq]r. %

no qrrT€dUl\ (rJg

Ja+€,![ o+ paTrJn+eJ

+nor+ pezTs T€8aT-qnS

i oquT. ?uu&oJg

uelp++noJ+ pezTs-T€8eT

SuTqsTJ luads s-mog

sdfJ+ Jo ro qunN

sJaTSuV Jo JaqunN

,VLL

BZ

ZZ

SUglLlu

ss3Y1d ,{0 sfldr,r u]oJ l[r ssH3w3iNIHSI'{ UO'{ YJVC IOOS i0l UH,I lTY '{O

(?,+uoc I srsffi )

(NVIUWWOS

(E t'o)os'ot

tQt

( zo'o)st't

$o'o)69'z

(to'o) 9q'o

(9r' a)1tr' 6

'BZ

( ro'o) 50' t

(te'o) zt'zr

(to'o) 09'o

0'0E.zEq'oe+l' I

a-t7a

'tt'9t

vIt

(e'L)*'Lt

LL L

ea'o)io't

r ̂.^ \ +rt. l- rw v I | | -

0'0

8'98,'\

oz.gr

,Lo

SWV(

Page 35: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

TABIA I (Corrt rd.)

SUMMARY O!' I,OG BOOK DATA TOR FIS}I]NG

AND CATCI1ES ]N FOI]R TYPES OF'PIACES US]NG TIIE MORE

succESSFUL TRrPS YrrrDlNG 5@ Ol', m,r-, lrsnTAKEN

( " )

parentheses encl-ose stald-ard' error of mear'

RIWRS TRIBU]ARIXS IVAROONAL{M

OIHEn-DAMS

: Nr:mber of Anglers

Nlrmber of triPs

llor:rs spent f ishi-ng

Legal-sized- troutt aken

BronnRainbow

Sub-legal- sizeal trorreturnecl

BronnRainb ow

/o und-er sized'

f Bro"4,/R"iob ow

Method of fisinirrg %frybaitspjxnerfty antt sP jlme]r

baj-t antl spiJmer

No. takeable fishper hour

No. takeable fishper mile

No. ta.keabfe fishper d"aY ( triP )

Total weight _ offish taken (lb s)

rlVei"ght of f ish

1o-t tr

59.1

669

E

0I t11+.8

7

o.o10"o

0.o

1.62(0 .06

5.01(0 .19

5"o0(0.15

157.8

15.18(o.56)

1 3

68.8

1f i20.o4 q

o.o28.6+ l . o0.o,l+.8

1.18(o.o5)fi.15(1.61)

3.62(0.o1)

152.811.75(o.LJ)

1462

728

8L.o

o27

12.90

0183

0.o89.3

o.o

l .o l (o .10 )

6 [email protected])

356.6

(6.\2)

01

10 .91

0.0

A+.1o.o0 .o

1.13@_.09)

t+ [email protected])

98.110.90(0.5i*)

91 4

18.5

255

23.

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.62

6q'\ e't qo'e

€z lz 6L

6.2 ca.r 68.0

Lr 5r eL

lqtTei A+9ueI

(sqT) +t{8T4.&

(seqouT ) r{+8ue.I

s anle,|! uoTsJa^uoc

0'0

0'0

o ov

t. Lz

:YY

0'0

E'z\'€

z'Lll'gtl

o'\z6.9

5'o

2"6

a :1v

z'ozL.EZ

z' Le

o'o6'zE'r,c.),5'Lzo'92.t'11

o.rlz veLI+ Ja+€3rfl

6'€z - o'zz6'Lz - o'oz6.6' - o.8r6.Lr - o.9L6'Er - o'116'er - o'z,L

$wqTUHfrO

twcvNoOw.rlSfruV.MSIUJSUSlrIt

f s alrcTrr )doouiI{'IiNfi

(p)SSSVTd .{O SSdIJ UOOJI NI

foOuf stsvTDIVJ ,{0 sNoTtflgru,rsrq szrs% uo,{ YtVa xoos flor ilo rEvfiIllns

(t,1uoc1 I trIsvI

Page 37: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

TABLE 8 (cont td.)

SUMMARY OF IOG BOOK DATA I'ORSPRING, SI]MMER AND AUTUMN fN FOUR

TYPES OF PIACN

SPRNVG1 r ) :n ,-r-,^- ^+

ar€fers(2) Days fished.(J) Nunber otr take-

q l ' l a f i c h n a r

day (trip)

SIIMIIMR( r )1 2 )t 3 )

AUTUM{( r )( 2 )

RNTERS TRIBI]IARIES ITAROONADAM

OITIIRDAMS

2 1qa

1 .36(0.o2)

1t+a2

.rZ

2'l

25q 2

1.26(0 .o1)

' r1

23' t .93(o.u+)

92.1

1.t+3(o.o5)

146)+

3.69(o .o t+)

67

2. 57 lo .19 )

1 iI

j .44(o.ol )

1 ' 7

I

1 . 92 (o "o3 )

37

2 . 8 6 ( 0 . 1 8 )

1 158

1.39(o.oo )

30"

Page 38: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

.tt

az-ls e8?Je^€ aqtr .saTJaqsrJ Jeq+o JoJ palonb sen 1e^ aq+ u€q+.req8rq,(1qe-^ rr.?r.T ^^rD r-^D ^;-^. - ^-^--J -*

D! Y-tJ./u q+rvel usaLr *cqlwr!

uT sqT C +noqe s€M s.ra18ue oqq ,tq ua:-e1 .lnoJ+ Jo azls e8e.zane aq;,

.,,seTJ€+nqTJ+tr uT wQl

,.sJaATJ,, uT aJcE.rad.ra.uol qrnu sr qslJ a1q€a)l€.] Jo f+TsLep au+ 'aTlu Jed?aJ€ oc€JJns JeTT€rns € a^€q sueaJ+s JaTTeus acuTs 'uaq+ acuaJaJJTp I"aJ

€ o+€cTpuT o+ ua)i€+ aJe aTTrtr .red saqclec aq+ JI .sJa^rJ .ra3,re1 uo ueqlssoT ser'd sureoJ+s JaTIeus uo Jnoq ..rad peqstg: ocue+sTp aqJ .,rsaTJ€+nqTrl ,,

r1/i rr-r r ^,.n rrFm rrr9nor /'rrrn < o:r ,! eL!4 *ou L,r-J o4!* . ,,-- rJ€.lnolJl ,r pJE LSJaATJI LTr^-- r\n arr9nor - r^T+rr ^,,. ,,q-^,,^ ffi

Y-ld.}UdLi+t,to|Lut,t+Lv

'((") 'A a1qetr) se1e"r-qo1ec.ra8.,re1 .{1qe1ce;dde erle8 6Ja^anou 3s.:a13ue >1ooq 3o1 -,fq ue1e1 qsTJ TT€

-To o/rtr lapTarf qc]u,v tlsJaT8u€ ru1 -To t ;erro nonr r rp .dr.rr I' .. -^ o/a - /-- - -- - | +s'L! L 40 bu !4+ c4r or Zd. I

lnoqe ) sd1.r1 TnJssoccns eJom ar{tr .sonT€^ no1 .f.:a.1, a^€q o+ <s.za13rre-uou^^ r-^J'1- r^..-i^i,^-^ a..f r-^. -^ ^ -^*qo+ ,r.ddurrd r\u /dLlJLJo!-rq du L^._IEA Jo sJe tdu€ ujoJ.J Lra4bl se+eJ J.r1L.r e.dbreA€'a.raqmesla saTJsqsTJ 1no.r1 pasluSocal pu€ par{sTTq€+s a-ITa^! uT ua^U

.saiu€1sLr Jaulo uT JelroT o+ (.,M.S.Ni rr ueql' .3. a ) sesec auosu! .roqElq rnorJ a.drreJ +nq saTJaqsTJ +noJ+ Jaq+o ur punoJ esor{+ o+ J€TT

-rtrTs eJe s€eJ€ TT€ uoJJ dTJ+ Jad ?Lre ftoq Jad r{c+€c JroJ sanT€r aqJ

'saceld ;:o saddl Jor{+o sq} T.req+ sa+€r qclec ;eq8rqpapg,to"rd uie O EuooJel1,{ .fdr-r1 .ro).fep.,red pu" irr€er+s Jo eT}u.rad .3u1qs1;:

Jo .r. orl Jed pefi+d€c r.lsTJ aTq€e{e+ Jo Jeqmnu a8e.raae aq? ..zT^ 'paz1.rru-ums uB('i a^€rT c+€r l.{c+€c Jo sed-{1 ee.:q1 .(c) pu€ (a) .g a1qeg, u1

.spoq+au SuTqsTJJTor{+ uT palec11.c glidosrrrr f1arr.11c.reduD c eJ€ s Ja18u€ erl] +eq+ uoT+e

-cTpuT u€ sr 'aut1a.-tous aq1 9uo 1e ,rasTJ' r.{sfJ pr-re q1,,rro.:3"raprm "fq papadur-r1ou s_r Fu11se c aaeq,r 'neq €uooJeg uo Surqsg;: ,f1;: go luroue TT"ms aqlL

..,ftTeT+Tul ra?s€rtr o+ SuTr{sTJ +noJ+ Jo poq+au +TncTJJTp +son eq1 sr Surqsr,;i.,{1g .suea,r1s ut s Sood daep aFJeT aq1 Furqsrg JoJ poll+au a1e1.rdo;dde

+sou eq+ 'soo€Id +sorn uT 's'r ?u1rru1ds 1no..r1 -{q -{11111ce ?utpaag ac€JJnsJO >{C€T Ere SltreeJ+s er{+ JO eJn+€u urvro.r3.:e,to aq+ Jo asnEcag . PuFrulds sel,t

sd3..r1 , s.-ra 13ue ,;:o .f1r.ro leu aq+ uo pasn 3rn1 8ue 3o enbrllqca1 aq;,

'((q)'e aTq?fr) qc+"c aq+ Joi{srJ eTq€a{€+ uT pe+Inser a1e..r qluo;F q31q aq1 e.raq,u

+dacxa ezts sTq€a{€+ Jo oJaM pe.rnldec qsrJ T€+o+ ar{+ Jo

,,:ro"r"" s-FI+ JoJ s auc+€ c

r!4eLoq6 *" .+..r-.p-*J ua+Jo +noJ+ no quT€J (s,uoqur€J q1!rl uo1111aduoou-T aJe .(aq+ uoqu sureaJ+s a+€{r.ntrop.{11n,;:ssdccns 1no.:1 uno.rq) sJaqtmu

iir ?^r r-.I-^ -^..^ ^a^- ur 4vr4oq n;r,u .roq1a3o1 luasa.rd aJe qs-TJ go selcads o&+ aq+uoqM .snpp ur E.r€ sJe^-FJ u-r slood daap e8rel ur .(1,re 1n cz1-re d .1no.r1 noq-rn€J r.req+ r{c}ec o+ +TncTJJ-lp arorrr qc tr aJe +noJ+ u,uo"rg .sua1s,(s .(eareg

pT.€ ua;J€14 aT{+ uT +srxe +noJ+ u.r oJq ;:o suollelndod Fur cnpoJdeJ-JTaS

qh1r€ (e/z

Sulsg.rduocEuooJ€r\d +"+no qv

Page 39: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

. :x 5 de3 I

r - <! s i

t

I.i

*

I&

= $

s'ri

9 L r , ot-1-l

r r 5 . ? , .

Length d.istributions from samples from tlams ard streans.

t:, .

Page 40: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

-t'tt

>IcoJg s a r{.orD{c1,iJ Jo sJa+€&peaq a+oual aq+ rrr pa.mldec aJa,[r qsTJ oN 'srrr€aJ+s

r{+oq uo sTT€Jra+€.&r Jo asnecaq sJa+€.,,^p€ aq aq1 o1 se8ao8 aq+ uoJJ u€sr+sdrlar\ou +ouuec qsTg .ueeJ+s +noJ+ +uaTTacxa u€ aq o+ {ooJg seorqJc1rll sJapTsuoa

.s.reerf -{ueu JoJ €aJe oq+ uT sueeJ+s paqsTJ pue pa{co+s s€r{ oqu 6?uoo,r€.&

.;:o a!\rreg ..r1! .sJaumo -{1..zedo.rd au1 .{q s,fep asa l+ pr'}lFmred s1 3u1qs1;i ou.q1.re6 .reau sueaJ+s +noJ+ TT€Es +saq aq+ Jo euo aq o+ paJep1suoo sT >IooJc,

JauLroJ eq+ qftroq11y.d1redo.rd a1el1.rd q9noJq+ rmJ '{ooJg >1JTC Jo sJo+cassu1e1d pue aF.ro8 aq6 .suT"Td oq+ uo pu€ 'a3.ro8 aq1 ur 'sJo+€rr^p€aq aq+ u-!

peqsTJ qc€o aJa^{ 'dJ€cS 8rr-TtJ€O aq1 u1 '>1oo.16 saorryor{ ?u€ r{ooJg {JT(

.anbruqcal Fu tTdlr€s ar{+ o+ aTqT-ssacc€ aJa,, r{cTqr! srrr€eJ+s Jo saqc+aJ+s puTJ o+ s€.&l. IJom sTq+ uT uaTqoJd

Jol.€m V .Ja+€L JeaTc aq+ ur eff,ldec adeJsd o+ uaas aJa[,4 qs13 me.; .{.rar-pTrE 'sarnr+ I€Ja,tas ua1.;o r{1qFno"roq1 ,,f.r a,,r pJqsIJ <Jolar,loq (a,:a,vr uea;1sJo saqc+aJ+s aqtr . acueprmq€ 9ur+euT+sa .ro;: anblur4cal es€aTeJ-{Jeu € Joasn .{.toTT€ o+ fT€us oo+ aJa.M pam+dEc i{s TJ Jo sJoqrtrnu arql, . 696L .f,-remrel

p'ue e)61 Jaqrnacac Sur.rnp peqsrg-oJ+calo oJen|. sureeJ+s Jo Jaqrmru V

Srust;:-o;r1ca1g .7

.uun+n€ pire Jarntrns Sufmp sueaJ+s 3ut.,r,ro1,;ur6r{+ uoJJ urap {ooJqs o{€.16 pr.re -{aa.rei1 o+u-! ur{op e-rou "{eu +noJ+ +€q+ saqc+€c

9ur13ire DoJJ acuapl^6 arlos sT aJeqJ, .( f; a8ed) flsnolae.rd pduTETdxdsuos€al JoJ ur€p aq1 ;:o e8e eq+ o+ pa+eTal aJe (e.3rg) pa.rnldec qsr.;

Jo sazTs pue (( alaeJ) sa+€J qc+€C .ece1d qcea u1 .f,e q e Jo eurfeJolls eq.IItroJJ +no pa18ue a"ran s+au arlJ .saqrEoJdd€ al-ar+q8Tu s€ sntep ur s-{e q olur

alrou +noJJ .eJJq+ lnoJl Jo slJodeJ .{re ueaq Jenau a,req a.rcq1 .,(1a-pcogarTToO aq+ ,tq s 3u11"za 8ur; pue f.rJ q+T,!r g+oq ,=

r66L a.1+ FuT.rn? prlToo+s,,{1a.rrrsue1xe Lreaq p€q +T +eq+ +c€J erl} o+Tdsep .esneceq pa pnlcxe ser'r

u-e6 uo1Fu111a fr\ .L96, Jaqua^oN Srn.rnp pe11au arar suep uor1e81.rrr x-gg

. 8uT++alt . t

ffid:utu( 1q).8rrysrJ +noJ+ o+ s.rauut8aq ere .unornl s1 11 .uoqm .;:o -(rreu

s..ra 13r-:e s+ceJ++e rrreo €uooJeM sE qJns Je+€r\ paT-ls lJ .,{11see ,re (.(11c11onCq11,u) aroq talqeactlou ,{1J€Tncr+red sr +T . aTc!€Tr€,re 3ut13ue jo ,{glenbaq+ o+ uoT+€TsJ uT id.eJ a.le .smea;1s aTqTssacc€uT -{1q31q aq1 a.roldxe o1pire seceld AulqsTJ o1 .q1.re6 uo"r; .{1.re 1n c-p 1"ru d .secuelslp 3uo1 ,t1a,lr1e

-.reduo c Terr€J+ o+ q8noua cglsegsnq+ue oJE oqi sJaTBue Jo Jaqtmu aqf

r,.su"p Jaq+o,, eq+ +€ Jarrmns ur lsaq8rq +nq ue6 €uooJe4 +€ uTtrn+n€ pu€Surrds Furflp reqFrT{ ara^a sa+€r r{c+€C .((n) .g a1qeg,) Sur.rds arT+ uT auoT

sen 9u1qs1,g: a.rou qgnoqlle .Jalmrns u1 rhiu-.rxeu e pue qgrq are s,'r oTJ uequ8u1..rds eq1 Srrc"mp 1sa.tro1 eJa-M, saTxB+nqTJ+ pu" sJa^TJ JoJ sa+€J qc+€C

.o+nqTJ.+uoc osle ,teu s{3o+s +noJ+ uo 3utqs1,3: Jo +unoue 11eus eq1 q9no-q+Te +noJ+ er{} Jo sa+€J q+,v.oJ8 +uaTtacxe aq+ Jo uor+coTJal e .{11sou s1

Page 41: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

i:r State jaffah forests (Tabfe t0). The highe st densities of fish of al-l-sizes were in the gor6e sections ntrich have previousfy been described asthe nost suitable sections of strearns for trout. Takeabl-e fish were how-

ever more numexous on the plai-ns where the largest, d.eepest pools occr:r.Both brooks c ontained- stretches of spa nfu€ gravel ard fish a6e O+ wereprevalent p artic ularly il the g orge section (I'r€. l) (age O+ refers tofish in their first year of lifeJ.

Sour streams were sampl-et! near Pemberton. carey Brook is used' bymature fish as a spanrixg strean but these fish have moved. donnstream bysunner; mostl-y O+ fi-sh were captured.. The section of Eagt brook sanpJ-eil

incfud.etl the pool- where one of the first trout planted :a 1911 was cap-

tured. in 1916 at 11il-b3. The stream has sjnce d-eteri-orateal clue to faruirrgpractices and- now has a poor flow j:r sumer. No O+ fish were captuzed. 5rl

lefroy 3rook. there is no spawning Srave1 in the Brooki the bed is sand.

anrl nud. Recruitment nust c@e fron the snafl tributaries fi:rther up-stream. A spanni-ng run of :-arge oature trout occu.rs each year with the

first rain ln the Brook. The lefroy Ile ir at Penberton (clownstream frornthe sanpLed- section) prevents firrther movement upstrea.m of marty fish to

sp awni-ng tributaries. Treen Brook Save the hjghest nmber per nil-e artd

weight per a,cre of trout of the streams sanpled. The brook Save a lowercatJtr rite for anglers tha.n other streams near Penberton. The only fish-

abl-e soction of the Brook is, in contrast to the rest of the stream,d"evoid. of correr fo? approaching anglers altl it contails mostly wa.r5r Browntrout.

Brown trout have not been stocked in Pemberton strearns for sorneyears but the waters contain predoninartly Brown trout although Rairbow

trout have been heavily stockeal in recent years.

In surmazlr, the best streans which were sampled. i-n llestern Australia

had. weights of fish per acxe that were j-n the lower raage of vaJ-ue s fortrout witers elsewhere jn the worild. Ilowever these values were J-argely

d.ue to the presence of large fish. The clensities of fish (numbers per

rnile ) were reJ-atively l-ow. The streans are lightly fishecl by a relativelysmalL number of arglers who, however, are highly efficient and successful

as shonn by the log-book sunmaries.

J. Sc al-e samPling

SanpJ-es of scafes from trout were availabfe, both from fi-sh recoraled

in arigli-n€ l€-books and frm fish taken by electro-fishing. The scal-eswere " re€dI to deternine the ages of the fish and the lengths at various

charges 5,n growth irr li-fe befor€ capt'rre.

Trout i.rr c old. temperate c1i-rnates show arr annulus on their scaLes i-n

each year of life. Growth is faster in spring, sumrner and autr:rnn (the

circuii on the sca-tes axe widel-y spaced.) ancl slower in wi-nter( ci_rcuLi are

cl-osely spacert) when mature fish also show a spawning nark of very

cJ-osely spaced. cjrcu:Li. fn warner c fi-mate s the agi,ng of trout is oftenconplicated. by the fornation of add itiona.l- checks alue to unfavourablE

Ijt+.

Page 42: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

.€TT?J+SnV UT SUep l[AU pu? SUIeSJ+S JamtrnsuI;reil T"uT8.rertr Jeq+o JoJ eSe.raae 1no qe q3noq11e 'sa1eu-t1c .rapToc u-'I

+noJ+ o+ paJ€dmoc T?uoT+dacxe oq plno.& rlooJg dnJ€8Te q pue t.rarr.gg -dlletruoq'ueg euoo.re16 JoJ sa+€J qym.:8 aq;, 'se+€o-TTc a+?Jedme+ Jeploc uT sIIIeeJls

elqe,reduoc uT sa+€J qgTr{ s? pepJe9al aq pTno$ asaql qFnoqll€ sa+el I{+-d oJF

+sairoT oq+ err13 srloo.rq Tleus aqf '(l.L eTq€[) oTqTssod se saceld ,{ueu seu-T +noJ+ .;o sq13ua1 a8e,:ale elqeqo;d a+€TncT€c o+ ?asn uaaq erleq "c1a

'fsaT€eeJ u3 s33e pautedstm nlal ? Jo acuesald) speuoS ,;:o uor +Tlnroc '(r{sTJ

d.rnleuu-t ) s>IJem .r.rad uo.r.;: tsuo11nq1.r1s1p q18ua1 moJJ acuapTla 9u11.roddnsprnl su"re11ed aT€cs Jo s ad.f1 asaql Jo scuaTJadxo snoyra.rd € Ja^alrcH

..{1u1e1'rac .;:o ea.r8ap qBTq e q+T" 'Y'.ll uT saT?cs rTar{+ uo,r;: 1no.r1 a8eo+ eTqTssodu! s1 11 Aulldues -f1q1uou.;:o ame.rSo.rd .(q13ua1 € +nor{+Til!

'v's Ir'E

1no.r1 8u1uo:8 +s€J JoJ suoT?Tpuoc Ja+ei[-[Lr?i J€TTu-rs Ja?un sJncco osT".(11.m1eu .{1.rea s1q1 Em a8e 3;o s.rea,{ Z uaqr arnl€u lC.raqcleg uo+Jaquad

ar{+ +€ +noJ[ ' aJn+€Itr +ou eJeil qcTTIl r{sTJ uo ($Iceqc 3u1u.ueds mo.r,;:qspgullslp o+ +InoTJJT? a.:e qclqu) $IceT{c g o1

'dn ue1.;o T{+TII T{+,uor8

.3:o su.ra11ed cT+"'zra pa[oqs +sa$-q+nos ar{+ uT +noJ+ Jo soT?cs or{J

. oJn+qtr uoqil snTftrue (auTuil€ds ) J3+Ir.ri[ ? uoqs -(1ropu€ raluTir SuTrnp TTajr uotS 1no.r1 uoT+Tp?E rlt ' peu.roJ aq TTTid. s{oaqc

r,^^^^^^- ^-,,^ 6^ t,*vDDevuo +e.r+ -Tq€Jno^€Fm oJe suoT+T?uoo Jalrulns aJar{ 1 's+€+Tq€r{

1eu13.reu Jo a..!T+€ cTpuT aJoJeJaq+ sT +I 'JaIImns uT suoT+Tpuoc Je+€ . ulr€il

Page 43: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

4ARTTI O

CATCH R{TNS I'ROM NEfTING ]N RRIGTTION DAMS

Nets used: 84 yards of 2".mesh, JJZ yarns of 2f;' mesh, and[6 yards of 3]" nesh. Average depth of net /8'r.

NAIIE 0I' DtM HOUXS NETTD NI]}[BER OI'TROJ] NETTND

CATCH X.{IENUIAER PER HoUR

Sti-rling

Harvey

Logue Brook

Samsons

Drakesbrook

Iilaroona

lo (2 nishts)

Jo (2 ni€hts )

15 (1 ni8ht)

15 (r nisht )

r r t / a - ; - r . + \t ) \ t ' L ! 6 ! t u t

5 (atter sunset)

,l

1

53

24

o

7.r

o.o3

o"o3

1 , 5

o

Page 44: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

r

(r.60r) Tetr

(o'vE) E'Ee

(B'tE) t'"7

(o) 6'g

(B'zL) z'Lz

(r.L) L.8z

(o) o

(z"t\) 5'+t1l

('7'92) z'ttE

(B'oz) E'ez

(r'29) L'9zt

( ) .q+7\ c.)6

G:e) e'*e(o) 1'61

(1.8) z.6e

(1.1v) 6.zLz

(o) o

(\'/i.) E'LoL

(?'ez) 9'LEE

(L.Et) 8.Eer

1.80'O

960'o

662'o

Ezf o

gzf O

6z0'o

zLz'o

6L'o

@0'o

c89

69

OLE

@E

or9

591

er

6E

6e

@L

x00ug NstruI

x00us .trou,ryI

ffi-Effi

ffiffiffi5

SNIIId

sJu0t

usm,tGwH

1i00ug fioliDlc]rl

sNIwd

siu0e

usJVl,lGVu{

fr6Ed-ffi

(s.rflvDrvr)(sffi)sttcv uf,d HSr,{

,t0 fHtrs[

(oravom)mr{ u&I

IST,{ iIO Us8n0N

( srucv)GIHSr,{

vuttv

(rusn )([HSI.{

Ifiil\XflITIVTIUfiS

ENII{ST.{-OETCSIS NOT,{ SIWRT.IS SIIOS NTHSr,[ ,{0 trSNVCNOSV ,{0 SSdVItrSfi

ot trIEVe

Page 45: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

TABIE .1 1

AiEXSGE LM.IGTHS ( mlCHES) OF TROUT nIVARTOUS STAGNS OI' GROUTH

llfaroona Dam

Logue Brook Da.ro

Samsons Dam

D onnelly River

Di-rk Srook

Mcl{noes Brook

Treen Brook

L,efroy Brook

Dalgarup Brook

spring and

1 2 . 9

Autllnn. 2+; 19.4in sprins )

9 .3

5.o

5.1+

5 . 1

) . 4

, . o

z t .

6.)+

1 1 . 215.4 in

18.316.7 in

11 .9

.1 ' r C

1 6 . 9

15 .O

10.9

4 2 4

17.2

9.o

9 . 9

19.9

1 . 1

9 . 5

8 .8

1 0 . 1

1+.8

15.9

19.7

22 .8

20.1

SU, - Iength at the end. of first sr:rmer (0+)

SU, - length at the end. of second sunner (1+)

R - 1en6th when the early wilter ilcrease jl

fl-ow of strearns and rise i-n ].evel- of dams cornmerlnosr

2, 3, 4 - lengths at the conpl et ion of sp awni-ng durilg winter.

Page 46: REPORT No. 10 - library.dbca.wa.gov.au · been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2.,

. a/'o:

.sirrE p u I pe{co+s eq pTnoqs +noJ+rroquTeg -{1ug ..f11uatc1,1;:a pe3erreu JT pooJ gre 1.rods +uoT1acxa apg,rordLre c +noJ.l 'uoJ.reu 01 paJJaJeJJ aJ€ lnoJ'] Jr 'aJaqM s a3ue.r aq1 uT silrc p

nJeJ o+ ual13 eq plnoqs ..{1tct1qnd aJol{ .pazTcr1qnd prr€ pe{co+s aq T,Tnoqs-' palcadxa aq deu qcruul suep .[taN .suap a8"reT uT

+noJ+ Jo s1co1s 8l1u1e+uT€u o+ pr€d eq p1noqs uoT+ue++€ JeTncT+Jed

.pa1ec11s1qdos erortr auocaq s.ra19ue pu€ sas€aJcuT e"rnss a.:d SuTqsTJs€ sllreaJ+s roTT€us aq+ uT pa)ico+s aq pTnoqs +noJ+ uji^oJg 'qsTJ Jo sJaqlnnu

eq+ uT€+uT?u o+ penuT+uoc aq ptnoqs srrr€aJ+s go Srrrxcols trTnFaU

SNOI.IYON$]4IWC 3gU A

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vr RXF'ERENCES

Cli:natic Surveys, w.A. (1955) Region 16 - South west.( 1962) P:egion 12 - AfbarJr.

Comonwealth Bureau of lfeterolqgr, Mefbourne.

tr'rancois, D.D.(1966) Report on lfest .Austra-1j.an Freshwater Fisheries.Report IIf, Department of Fisheries a.red Fauna, ll.A.

HydroJ-ogical Data to lhe 1962 lfater Year.Publ-ic Works lepartnent, 1[.A.

Hobbs, D.tr'.(19it7) Natural- Reproduction of Trout in New zea.l-and..N.Z. Marine Dep arfuent, i9eJJ-i-ngton.

Jenli-ns, C.I.H. (195'l-51) ttre tooa of trout in WesterT} Australia.Ilest Austral-ian Naturalist

2. llg-'tt*l.

, ^ - _ \ _!ake, J.S. (1957l Trout populations and habitats in N.S.W.411+-+P

stream and the

319 - 39

Aust. Jor:r. Mar:. Freshw. Res. S ( l ) ,

Nicholls, A.G. (1958) The population of a troutsurvi-va.]- of rel-e ased. fish"eust. lour. ltar. fresnw. % (il z

Pemberton-Itarren Trout Accl-imatization io"i.ty.Annual Reports, 1943 - 1961.

III

ty')"

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