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- 저자 : 이완옥(Lee Wan Ok) (검색결과 76 건)
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보문 : 북방종개 Cobitis pacifica (Pisces: Cobitidae)의 배 발생과 초기생활사
이완옥 ( Wan Ok Lee ),김경환 ( Kyeong Hwan Kim ),백재민 ( Jae Min Baek ),강용진 ( Young Jin Kang ),전형주 ( Hyoung Zoo Jeon ),김치홍 ( Chi Hong Kim ) 한국하천호수학회(구 한국육수학회) 2011 생태와 환경 Vol.44 No.1
We investigated developmental stages of embryo and early life history of the Korean indigenous fish, the northern loach, Cobitis pacifica in 2009 in order to understand fundamental knowledges for conservation of this species. Eggs were obtained after hormones injections(LHRH-a, HCG) and were artificially fertilized by the dry method. The embryo was spherical, separative demersal, faint white, and averaged 1.09±0.04mm (n=20) in diameter. The hatching of the embryo took place in about 48 hours after fertilization under water temperature of 21.0~24.0℃ and the newly hatched larvae averaged 2.87±0.05mm (n=20) in total length (TL). Four days after hatching, the larvae grew up to 6.86±0.10mm (n=10) in TL and york sac absorption, mouth and anus opening were shown. Fourteen days after hatching, most of fin-rays appeared at 10.71±0.34mm (n=10) in TL and color spots on the body surface were attained. Twenty six days after hatching, the larvae grew up to 14.88±0.45mm (n=10) in TL, and all their fin-rays were formed. Therefore, according to current study regarding the morphological development of Cobitis pacidica, the conversion from larval to juvenile stages occurred at 26 days after hatching. Eighty days after hatching, the larvae were 33.3±1.25mm (n=10), and their body shape and color pattern were similar to adult fish. In this study, embryonic development and early life history of the northern loach, Cobitis pacifica show morphological characteristics of Cobitidae family. We expected that our results can be used as an fundamental knowledges for restoration study of indigenous fish species.
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참갈겨니 Zacco koreanus (Pisces: Cyprinidae)의 난 발생과 초기생활사
이완옥 ( Wan Ok Lee ),김경환 ( Kyeong Hwan Kim ),백재민 ( Jae Min Back ),송미영 ( Mi Young Song ) 한국어류학회 2013 한국어류학회지 Vol.25 No.4
We investigated developmental stages of egg and early life history of the Korean indigenous fish, Korean Chub Zacco koreanus from the South Han River in 2011 for phylogenetic study and conservation of this species. Eggs of Zacco koreanus were artificially fertilized by the dry method in the laboratory. The fertilized eggs were demersal, almost spherical in shape, transparent and unpigmented, with a pale yellow yolk, and no oil globule and average 3.09±0.07 mm (n=10) in diameter. The hatching of the embryo took place in about 68 hrs after fertilization under water tem-perature of 20.0~23.0℃ and the newly hatched larvae were average 10.30±0.40 mm (n=10) in total length (TL). Six days after hatching, the larvae grew up to 16.12±0.42 mm (n=8) in TL and york sac absorption, mouth and anus opening were shown postflexion larvae stage. 17 days after hatching, most of fin-rays appeared at 18.21±0.38 mm (n=6) in TL and brown spot appeared on the abdomen. 27 days after hatching, the larvae were brought up to 20.01±1.12mm(n=5) in TL and all their fin-rays were formed. 120 days after hatching, the larvae (juvenile) were 23.29±3.12 mm (n=10) in TL and their body shape and color pattern were similar to the adult fish.?
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이완옥 ( Wan Ok Lee ),고명훈 ( Myeong Hun Ko ),백재민 ( Jae Min Bak ),김대희 ( Dae Hee Kim ),전형주 ( Hyoung Joo Jeon ),김경환 ( Kyeong Hwan Kim ) 한국어류학회 2010 한국어류학회지 Vol.22 No.4
We performed field investigations at six stations in Buk Stream of Goseong-gun, Gangwon-do, Korea, from May to September 2009 to understand the stream`s fish fauna and community structure. In the survey, 31 species belonging to 20 families were collected. Dominant species by number was Zacoo koreanus(30.0%), and subdominant species were Pungitius kaibarae(9.4%) and Rhynchocypris steindachneri(9.3%). In biomass, the dominant species was Tribolodon hakonensis(35.5%), and subdominant species were Z. koreanus(22.5%) and Cobitis pacifica(7.5%). Eight Korean endemic fish species and two endangered species (P. kaibarae and Pungitius sinensis) were collected. In addition, four anadromous fish species (T. hakonensis, Oncorhynchus masou masou, O. keta, Gasterosteus aculeatus) and two amphidromus fish species (Plecoglossus altivelis altivelis and Gymnogobius urotaenia) were observed. Interestingly, we verified the existence of several fish species in Buk Stream where they have not lived before. Those species were previously reported to live only in rivers that run into the western and southern sea of Korea. Five of those species (Zacoo koreanus, Z. platypus, Silurus microdorsalis, Liobagrus andersoni and Coreoperca herzi) were reported in Buk Stream in the 1980s. The other species (Pungtungia herzi, Pseudorasbora parva, Squalidus multimaculatus, Misgurnus mizolepis, Koreocobitis rotundicaudata, Silurus asotus and Odontobutis interrupta) have been introduced since the 1990s.
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