Salmonidae thru Antennaridae1

Family Salmonidae (Trouts and Allies)

Usually recognized as three subfamilies.o Salmon and Trouto Graylingso Whitefish

Species of interest:o Atlantic Salmon

(Salmo salar)

Salmonidae thru Antennaridae2

Salmon and Trout

Have fine scales and a short dorsal fin Dominate cold water (Northeast U.S.)

Anadromous

Atlantic Salmon

Salmonidae thru Antennaridae3

Osmoregulation of Fishes

Osmoconformers - have internal ionic concentrations identical to the surrounding water

Osmoregulators - control the internal ionic concentration of their tissues

Salmonidae thru Antennaridae4

Osmoregulation of fishes

Salmonidae thru Antennaridae5

Life History stages of Anadromous Salmonids

Alevin (yolk-sac larvae)

Fry Smolt Adults

Salmonidae thru Antennaridae6

Aquaculture of Salmonids

Some facilities raise individuals from hatch to harvest

Others only raise individuals a short time and release them to enrich natural populations.

What are some problems associated with aquaculture?

Salmonidae thru Antennaridae7

Salmonidae Aquaculture

Egg and Milt Harvest

Fish Pens

Prince William Sound Aquaculture

Salmonidae thru Antennaridae8

Family Synodontidae

Lizardfishes Local species:

o Inshore Lizardfish (Synodus foetens)

o Sand Diver (Synodus intermedius)

Synodus intermedius

Salmonidae thru Antennaridae9

Synodontidae

Benthic dwellers that usually occur in shallow water

Ambush predators, blends with surroundings

Synodus foetens

Salmonidae thru Antennaridae10

Family Batrachoididae

Toadfishes Local species:

o Oyster Toadfish (Opsanus tau)

o Atlantic Midshipman (Porichthys plectrodon)

Opsanus tau

Salmonidae thru Antennaridae11

Batrachoididae Characteristics

Well camouflaged benthic marine fisheso Common in shallow water habitats

Naked body, barbels around the moutho Some species have two lateral lines

Dorsal fin has spines

Salmonidae thru Antennaridae13

Batrachoididae Vocalizations

Oyster Toadfish and Midshipman make incredibly loud sounds by vibrating its swimbladder

Salmonidae thru Antennaridae14

Swimbladders

The density of seawater increases the buoyancy of the animals that live in ito Swimbladders constitute only 5% of the

body volume in marine spp.o 7% in freshwater spp.

Salmonidae thru Antennaridae15

Physostomous Swimbladders

Has a connection between the swimbladder and the gut (pneumatic duct)o Inflate swimbladder by gulping air at the

surface

Usually found in ancestral soft-rayed fishes (Herrings, Salmonids and Cyprinids)

Salmonidae thru Antennaridae16

Physoclistous Swimbladders

Have special structures associated with the circulatory systemo A network of capillaries and gas gland

allow the inflation and deflation of the swimbladder

Frees fish from their dependency on the surface

Salmonidae thru Antennaridae17

Order Lophiiformes

Goosefish and Frogfishes

Fishes in this order are commonly called Anglerfisheso Family Lophiidae

• Goosefishes

o Family Antennariidae

• Frogfishes

Goosefish

Salmonidae thru Antennaridae18

Goosefishes

All have similar methods in attracting prey (Anglerfish)o Illiciumo Escao Illicium and esca

are waved to mimic and attract prey

Salmonidae thru Antennaridae19

Common Species

Goosefish (Lophius americanus)o Marketed as

Monkfisho Can reach 4ft.

50lbs.

Salmonidae thru Antennaridae20

Family Antennaridae (Frogfishes)

Associate with drifting Sargassum and hard structures on the benthos

Share many similar characteristics with Lophiidae

Have globose bodies that can walk across the bottom on their pectoral and pelvic fins

Salmonidae thru Antennaridae21

Antennaridae Characteristics

Scales resemble projections

Limited to the 20° isotherm

Salmonidae thru Antennaridae22

Common species

Sargassumfish (Histrio histrio) Drifts in Sargassum blending with its surroundings