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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.
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 韓國魚類學會誌 Vol.25 No.4
우리나라 고유종인 참갈겨니를 2011년 남한강에서 채집하여 Zacco속의 유연관계와 종 보존의 기초자료를 얻기 위하여 난 발생 과정과 초기생활사를 연구하였다. Z. koreanus 난은 실험실에서 건식법으로 수정되었다. 수정란은 원형이고 투명하며, 엷은 황색난황을 가지고 있고, 유구가 없으며,약한 점착성 침성란으로 난경은 3.09±0.07mm(n=10)이었다. 수온 20.0~23.0??C에서 수정 후 68시간 전후하여 난 발생이 완성되었으며, 부화자어의 크기는 전장 10.30±0.40mm (n=10)이었다. 부화 6일 후에는 전장 16.12±0.42 mm(n=8)로 성장하였고, 난황이 거의 흡수되었으며 입과 항문이 열린 후기자어기가 되었다. 부화 17일 후에는 전장 18.21±0.38mm(n=6)로 자랐고, 대부분의 지느러미에 기조가 나타났으며, 복부에는 갈색반점이 출현하였다. 부화 27일 후에는 전장 20.1±1.12mm(n=5)로 성장하였고, 모든 지느러미의 기조수가 정수에 도달하였다. 부화 120일 후에는 전장23.29±3.12mm(n=10)로 성장하였으며, 외형과 반문이 성어와 유사하였다. 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.?