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RISS 인기검색어
- 검색키워드
- 저자 : 백윤걸 ( Ki Chul Choi (검색결과 2 건)
- 무료
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Gobiobotia macrocephalus Mori 의 생활사
최기철,백윤걸 ( Ki Chul Choi,Yun Keol Baek ) 한국하천호수학회 1972 생태와 환경 Vol.5 No.3·4
1. The authors studied about the life cycle and a part of habits of Gobiobotia macrocephalus as well as on the growth rate and distribution of the species. 2. The authors would like to report that the species was collected at Samogri, Yeong-Weal eub; Cheong-Rhyang-po, Yeong-Weol-eub; Munmag, Weonseong-Gun, the Jojong River, Gapyeong-Gun; Muju, Muju-Gun; Hyeondo-Myeon, Chong-Weon Gun. 3. Both of male and female of the species did not show any searl orans around mouth and nuptiale colorations in the spawning season. 4. Spawning activities of the species were continued from endding of May to endding of June, 1972 under 18∼21℃ of water temperature in the Dong River and the Seo River in Yeong-Weol Gun. In the beginning of June, the spawning activeties of the species were most active. 5. The spawning places were lower edge portion of the rappids where covered with pebbles, 8∼15 cm in depth and the verocity was 88∼100 cm per second. 6. Spawning of the species occur into the pebbles under bottom surface of the spawning places. The females of the species have 120∼1,300 of eggs as far as the authors have studied and the numbar of eggs were proportional to the size of them. 7. The diameter of the fertilized eggs were 0.8 mm, and were swollen to 1.5 mm. Three days were needed to hatch, 6 days to absorb the Yolk-sac completly, 30 days to complete the form. At that time, the total length of the young fish was 15 mm. 8. The authors recognized that the young fish grew up to 30 mm in total length in 2 months after hatched, 50∼60 mm in 1 year; 80∼90 mm in 2 years and over 100 mm in over 3 years. 9. The main habtiats of the adult fish and young fish of the species were different and the mixed groups of adult and young fish of the species with others were also different in the composed species and composition ratio as shown in Table 9 and 10. 10. Open and close movemement of pupils of the species is occur according to brightness. 11. The authors noticed that the function of 3 pares of the barbles attatched under jaw is to attatch to the bottom.
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최기철,백윤걸 ( Ki Chul Choi,Yoon Kul Baek ) 한국하천호수학회 1970 생태와 환경 Vol.3 No.1·2
1. The life-cycle of Gonoproktopterus mylodon was not studied up to date. 2. In this report, the young stage from fertilized egg to 50 mm in total length of Gonoproktopterus mylodon was studied by Baek and the growth rate mainly by Choi. 3. Spawning activities of this species continued from May 8 to May 16, 1969 and from April 27 to April 30 under 16.5∼18℃ of water temperature at Tong River in Yung-Wul, Kangwun-Do. 4. In the spawning season, pearl organs around mouth and nuptiale coloration of male were very distinct and, besides, silver white color on the ventral side of male changed to dark black. 5. At night, this species spawned at the river bottom, 42∼62 cm deep, covered with stones and gravels, and where stream velocity was 28.6∼36.3 cm per second. After the eggs were deposited in the hole of 13∼17 cm in long diameters, 3∼13 cm in short diameters and 5∼8 cm in height dug by the fish, gravels were carried and piled up to cover the hole. The size of the gravel piles was as follows: long diameter was 40∼58cm, short diameter 22∼35 cm, and height 5∼18 cm. 6. The number of eggs laid in a hole was 1,200∼2,300. The egg was about 3 mm in diameter and each egg of the grape -cluster-like egg mass stuck to one another with muccous substance. 7. The embryo of the fish hatched 5 days after spawned, and the yolk sac of the embryo was absorbed within 20 days after hatched. 8. Tatal length of the embryo was 8 mm just after hatching from egg, and 30∼50 mm 111 days after hatching. Young fish grew up to 90 mm in total length in 1 year, 190 mm in 2 years, and 250 mm in 3 years. 9. Young fish group of this species was found near riversides where it was less than 1 m deep, and the velocty of current was slow and the bottom of which was covered with rocks and gravels. The young fish schooled with those of Hemibarbus longirostris, Pungtungia herzi, Pseudogobio esocinus and Zacco platypus. The authors noticed that the young fish of this species gradually moved to deeper places as they grew larger.
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