OCCURRENCE OF CULEX (BARRAUDIUS) INATOMII KAMIMURA … · inatomii Kamimura and Wada, the rarely...
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Journal of the American Mosquito Control Association, 14(3):344_345, l99g Copyright @ 1998 by the American Mosquito Control Association,Inc. OCCURRENCE OF CULEX (BARRAUDIUS) INATOMII KAMIMURA AND WADA (DIPTERA: CULICIDAE) IN A LARGE MARSH ADJACENT TO THE COAST OF ULSAN. KOREA HAN-IL REE Department of Parasitology, College of Medicine, Yonsei (Jniversity, Seoul 12O-752, Korea ABSTRACT. The occurrence of Culex (Barraudius) inatomii Kamimura and Wada was observed from a large, reedy marsh with fairly polluted brackish water near the coast of Ulsan, Korea, at an industrial complex. On average, 263'6 larvae pe. qiP (450-cc dipper) were collected, and 408 females were caught by truman bitlng collection in an hour. A CDC light trap set up outdoors collected 5ll Cx. inatomii (96.gS0 ai the total mos- quitoes). The occurrence of this rarely reported mosquito raises questions about the effects of habitat modification and the need for further study. KEY WORDS Culex inatomii, occurrence. Korea The Ulsan industrial complex, located on the east coast of the Korean peninsula, has been continu- ously expanded since the 1970s. In the middle of the complex, a large marsh (26 ha) was created about 10 years ago. The marsh is heavily covered with reeds. Industrial and family waste waters par- tially flow into the brackish water of the marsh. Inhabitants of 2 villages (total population of 356), Ochon-maul and Odae-maul of Yongam-ri, Chon- gryang-myon, Ulsan-si, adjacent to the marsh, have complained of severe mosquito bites for several years.Therefore,a mosquito survey was carried out at Ochon-maul and the marsh on August 3-4, 1997, and the principal mosquito was found to be Culex inatomii Kamimura and Wada, the rarely reported species. Larval collection was made by dipping with a 450-cc dipper. Tlree dips were made at each of 3 randomly selectedsites of the marsh (Table l). A total 2,415 larvae were collected by 9 dips at the random sites. The number of larvae per dip was 268.3, consisting of 263.6 larvae of Cx. inatomii, 2.9 larvae of Culex tritaeniorhynchusDyar, and 1.9 larvae of Aedes dorsalis (Meigen). A CDC minia- ture black light trap was set up under the eave of a storehouse in Ochon-maul and operated through- Table l. Larval collection in the marsh by dipping t+SO-"" dtpp"rt tt No. larvae Site Aedes No. Culex Culex d.<tr- dips inatomii tritae salis out the night (2100-{600 h) on August 3-4,1997. As shown in Table 2, 528 mosquitoes were col- lected, of which the majority (511) were Cx. ina- tomii (96.8Vo). The others were Cr. tritaeniorhyn- chus (O.6Vo), Culex pipiens pallens Coquillett (O. EI), Anophelessinensis Wiedemann(O.9Vo), and Ae. dorsalis (I.3V'). A human biting collection was carried out outdoors, approximately l0 m away from the breeding place (the marsh), for an hour from 2200 to 230Oh. Only 2 species were collect- ed, 408 females of Cx. inatomii and 3 females of An. sinensis.There was only 1 cow stocked in the village. Mosquitoes were also collected while rest- ing on the wall of the cow shed during daytime with the use of a torch and an aspirator. All mos- quitoes aspirated were killed in a chloroform tube and identified under a stereoscopic microscope. Out of 71 mosquitoes collected, 8O.3Vo were Cx. ina- tomii (57 females), and the rest were An. sinensis (l2.7%o), Cx. pipiens pallens (2.8Vo), and Ae. dor- salis (4.2Vo). Culex (Barraudius) inatomii was described by Kamimura and Wada (1974) as a new subspecies of Culex modestusFicalbi and later elevated to spe- cies status by Tanaka etaI. (1979). This species was Table 2. CDC black light trap collection installed under the eave of a storehouse at Ocheon village near the marsh in Ausust 1997. No. mosquitoes/ trap/night Species Fe- male Male Total Vo Site A Site B Site c Total No. per dip Vo J J J 9 947 23 4 9 0 r,376 3 2,372 26 263.6 2.9 98.2 1.1 0 970 t7 66 o 1,379 17 2,415 1.9 268.3 o.7 100 Culex inatomii C ulex t ritae nio rhync hus Culex pipiens pallens Anopheles sinensis Aedes dorsalis Total 511 96.8 3 0.6 2 0.4 s 0.9 7 1.3 528 100 496 15 3 0 1 l 5 0 2 5 507 2l
Transcript of OCCURRENCE OF CULEX (BARRAUDIUS) INATOMII KAMIMURA … · inatomii Kamimura and Wada, the rarely...
Journal of the American Mosquito Control Association, 14(3):344_345, l99gCopyright @ 1998 by the American Mosquito Control Association, Inc.
OCCURRENCE OF CULEX (BARRAUDIUS) INATOMII KAMIMURAAND WADA (DIPTERA: CULICIDAE) IN A LARGE MARSH
ADJACENT TO THE COAST OF ULSAN. KOREAHAN-IL REE
Department of Parasitology, College of Medicine, Yonsei (Jniversity, Seoul 12O-752, Korea
ABSTRACT. The occurrence of Culex (Barraudius) inatomii Kamimura and Wada was observed from a large,reedy marsh with fairly polluted brackish water near the coast of Ulsan, Korea, at an industrial complex. Onaverage, 263'6 larvae pe. qiP (450-cc dipper) were collected, and 408 females were caught by truman bitlngcollection in an hour. A CDC light trap set up outdoors collected 5ll Cx. inatomii (96.gS0 ai the total mos-quitoes). The occurrence of this rarely reported mosquito raises questions about the effects of habitat modificationand the need for further study.
KEY WORDS Culex inatomii, occurrence. Korea
The Ulsan industrial complex, located on the eastcoast of the Korean peninsula, has been continu-ously expanded since the 1970s. In the middle ofthe complex, a large marsh (26 ha) was createdabout 10 years ago. The marsh is heavily coveredwith reeds. Industrial and family waste waters par-tially flow into the brackish water of the marsh.Inhabitants of 2 villages (total population of 356),Ochon-maul and Odae-maul of Yongam-ri, Chon-gryang-myon, Ulsan-si, adjacent to the marsh, havecomplained of severe mosquito bites for severalyears. Therefore, a mosquito survey was carried outat Ochon-maul and the marsh on August 3-4, 1997,and the principal mosquito was found to be Culexinatomii Kamimura and Wada, the rarely reportedspecies.
Larval collection was made by dipping with a450-cc dipper. Tlree dips were made at each of 3randomly selected sites of the marsh (Table l). Atotal 2,415 larvae were collected by 9 dips at therandom sites. The number of larvae per dip was268.3, consisting of 263.6 larvae of Cx. inatomii,2.9 larvae of Culex tritaeniorhynchus Dyar, and 1.9larvae of Aedes dorsalis (Meigen). A CDC minia-ture black light trap was set up under the eave ofa storehouse in Ochon-maul and operated through-
Table l. Larval collection in the marsh by dippingt+SO-"" dtpp"rt tt
No. larvae
Site
AedesNo. Culex Culex d.<tr-dips inatomii tritae salis
out the night (2100-{600 h) on August 3-4,1997.As shown in Table 2, 528 mosquitoes were col-lected, of which the majority (511) were Cx. ina-tomii (96.8Vo). The others were Cr. tritaeniorhyn-chus (O.6Vo), Culex pipiens pallens Coquillett(O. EI), Anopheles sinensis Wiedemann (O.9Vo), andAe. dorsalis (I.3V'). A human biting collection wascarried out outdoors, approximately l0 m awayfrom the breeding place (the marsh), for an hourfrom 2200 to 230O h. Only 2 species were collect-ed, 408 females of Cx. inatomii and 3 females ofAn. sinensis. There was only 1 cow stocked in thevillage. Mosquitoes were also collected while rest-ing on the wall of the cow shed during daytimewith the use of a torch and an aspirator. All mos-quitoes aspirated were killed in a chloroform tubeand identified under a stereoscopic microscope. Outof 71 mosquitoes collected, 8O.3Vo were Cx. ina-tomii (57 females), and the rest were An. sinensis(l2.7%o), Cx. pipiens pallens (2.8Vo), and Ae. dor-salis (4.2Vo).
Culex (Barraudius) inatomii was described byKamimura and Wada (1974) as a new subspeciesof Culex modestus Ficalbi and later elevated to spe-cies status by Tanaka etaI. (1979). This species was
Table 2. CDC black light trap collection installedunder the eave of a storehouse at Ocheon village near
the marsh in Ausust 1997.
No. mosquitoes/trap/night
SpeciesFe-
male Male Total Vo
Site ASite BSite cTotalNo. per dipVo
J
J
J
9
947 234 9 0
r,376 32,372 26
263.6 2.998.2 1.1
0 970t7 66o 1 ,379
17 2,4151.9 268.3o.7 100
Culex inatomiiC ule x t ritae nio rhync husCulex pipiens pallensAnopheles sinensisAedes dorsalis
Total
511 96 .83 0.62 0.4s 0.97 1 .3
528 100
496 153 01 l5 02 5
507 2 l
