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RISS 인기검색어
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- 저자 : 이완옥 ( Wan-ok Lee ) (검색결과 43 건)
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섬진강과 임진강에 서식하는 쏘가리 Siniperca scherzeri (Perciformes, Centropomidae)집단의 성 성숙 및 섭식특징
이완옥 ( Wan Ok Lee ),백재민 ( Jae Min Baek ),이종하 ( Jong Ha Lee ),김경환 ( Kyeong Hwan Kim ),김치홍 ( Chi Hong Kim ),윤승운 ( Seung Woon Yoon ) 한국환경생태학회 2012 한국환경생태학회지 Vol.26 No.1
2008년 4월부터 10월까지 임진강과 섬진강에서 쏘가리의 산란 생태를 조사하였다. 산란에 참여하는 쏘가리 개체군의 체장과 생식소성숙도지수(GSI)의 상관관계를 조사한 결과 암컷은 체장 200㎜이상의 개체에서 성적으로 성숙하였고, 수컷은 체장 180㎜이상이 성숙되었다. 섬진강산 암컷의 GSI는 4월에 가장 높은 값인 7.43%를 나타냈지만, 이후 점차 감소하여 5월에 5.55%, 6월에 3.58%로 점진적으로 감소하다가 8월에 급격히 감소하고, 9월에 연중 최저치인 0.44%로 낮아졌다. 임진강산 암컷은 섬진강산 암컷과 비슷한 경향을 보였다. 임진강산 수컷의 GSI 값은 암컷보다 높아서 4월 5.96%, 5월에는 8.03%까지 높아졌고, 6월 초부터 낮아졌으며, 6월말에 2.12%이었고, 9월에 0.2% 이하로 가장 낮게 나타난 후 점차 상승하여 10월에 0.54%이었다. 암컷의 생식소를 조직학적 관찰한 결과 섬진강과 임진강 집단에서 모두 GSI의 변화는 비슷하게 발달하였다. 쏘가리 위 내용물 중 어류가 차지하는 비율은 섬진강과 임진강에서 각각 92.0%, 90.0%로 나타나 쏘가리의 가장 중요한 먹이생물이었다. 쏘가리 위 내용물 중 소화가 많이 진행되어 종의 동정이 불가능한 어류의 비율이 각각 50.0%, 72.2%로 높게 나타났다. 쏘가리의 조사기간 중에 섭식율은 섬진강이 36개체로 38.3%, 임진강이 53개체로 21.8%로 매우 낮았다. This study was conducted to investigate the reproductive ecology of the Korean Mandarin Fish, Siniperca scherzeri in Seomjin River and Imjin River from April to October 2008. After have investigating the relationship between standard length (SL) and Gonadosomatic index (GSI) of Siniperca scherzeri, we can conclude that the body length of maturation was over 200㎜SL in case of females and over 180㎜SL in males. The GSI of the females that were from Seomjin river was the highest in April (7.43%), and gradually decreased after May (5.55%) and June (3.58%). The GSI was decreased sharply in August and indicated the lowest value in September (0.44%). The GSI of the females that were from Imjin river showed similar tendency of females`` GSI from Seomjin river. The GSI of males from Imjin river was totally higher than that of females, it was 5.96% in April, and 8.03% in May. It was lowered in early June, and late June, it indicated 2.12%. In September, it was the lowest value (0.20%), and increased after October (0.54%). The result of histological study of ovary presented similar result of the study of GSI in Seomjin river and Imjin river. The ratio that fishes constitute in stomach contents of Siniperca scherzeri was 92% in Seomjin river and 90% in Imjin river. Digestion of food organisms and the ratio of unidentifiable fishes in stomach contents was fairly high, and it was 50% in Seomjin river and 72.2% in Imjin river. In the period of study, eating ratio was very low 38.3% (36 ind.) in Seomjin river and 21.8 (53 ind.) in Imjin river.
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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 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.?
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