http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이기욱(Ki-Wook LEE),한경식(Gyeong-Sik HAN),임현정(Hyun-Jeong LIM),변순규(Soon-Gyu BYUN) 한국수산해양교육학회 2021 水産海洋敎育硏究 Vol.33 No.2
This study aimed to investigate the optimal water temperature (low temperature; LT: 5, 8, 11 and 14℃, high temperature; HT: 17, 20, 23, 26 and 29℃) on growth of juvenile starry flounder. In the LT experiment, we used juvenile starry flounder averaging 19.3±0.1 g/fish (Mean ± SD) of body weight, in the HT experiment, the experimental fish averaging 15.8±2.7 g/fish (Mean ± SD) of body weight, and we reared the fish for 80 days. Survival of fish of LT group was >96.3%, and HT groups was >90.0% except for 29℃ (48.0%). Feed consumption, feed efficiency, weight gain and specific growth rate (SGR) in 5℃ was significantly lower than of fish reared at other temperature, and significantly higher weight gain was observed in 11 and 14℃ than other temperature of LT group. Highest weight gain and SGR was observed in 17℃ in HT group, and 29℃ was significantly lower than of fish reared at other temperature. Visceral somatic index and hepatosomatic index were not significantly difference among the temperature. Considering these results, the optimal rearing temperature range for normal growth and feed efficiency of juvenile starry flounder is 11-20℃.
조도 및 광주기가 명태(Gadus chalcogrammus) 자어의 생존과 성장에 미치는 영향
이기욱(Ki-Wook LEE),한경식(Gyeong-Sik HAN),변순규(Soon-Gyu BYUN),김우진(Woo-Jin KIM),김경덕(Kyoung-Duck KIM),임현정(Hyun-Jeong LIM),김소선(So-Sun KIM) 한국수산해양교육학회 2021 水産海洋敎育硏究 Vol.33 No.4
This study investigated the survival rates and growth of larval walleye pollock (Gadus chalcogrammus) reared at different photomanipulation. Larval walleye pollock were reared at four light intensities (experiment 1: 50, 250, 1000 and 2500 lux) and five photoperiods (experiment 2: 24L:0D, 18L:6D, 12L:12D, 6L:18D and 0L:24D) from hatching (30 days post hatch). Survival of larval fish of experiment 1 was >15% and there was no significant difference between 50, 250, and 1000 lux, however, whole fish was dead at 16 days post hatch in 2500 lux. Growth of larvae at 1000 lux was greater than larvae at all other light intensities treatments. Survival rates of experiment 2 was >14% except for 0L:24D, and 18L:6D was significantly higher than that of larval fish reared at other photoperiods. In 0L:24D, the death occurred continuously after initial of experiment, whole larval fish died on 21 days post hatch. Growth of larvae that illuminated the light more than 12 hours were higher than that of larvae reared at 6L:18D. Considering these results, the optimal rearing light intensity and photoperiod was 1000 lux and 18L:6D, respectively. Further, intensive light or lightless condition cause mortality of walleye pollock larvae.
명태의 수정란 부화 및 자어 생존에 미치는 염분의 영향
최진(Jin CHOI),이기욱(Ki-Wook LEE),한경식(Gyeong-Sik HAN),변순규(Soon-Gyu BYUN),임현정(Hyun-Jeong LIM),김희성(Hee-Sung KIM) 한국수산해양교육학회 2020 水産海洋敎育硏究 Vol.32 No.3
The aim of this study was to investigate the influence of seawater salinity on hatching rate of fertilization eggs and larval survival of walleye pollock, Gadus chalcogrammus. The following water salinity was considered: 10, 15, 20, 25, 30 and 34 psu for the control (natural seawater). Survival of eggs maintained at 34 psu was greater than that of eggs maintained at different salinities for 12 days. The highest hatching rate was observed for larvae maintained at 34 psu, and higher than other salinity treatments. Time to first hatch of eggs maintained at 10, 15 and 20 psu was longer than at 25, 30 and 34 psu. However, time to 50% and 100% hatch of eggs maintained at 10 psu was shorter than those of eggs maintained at 25, 30 and 34 psu. Survival of larvae at 34 psu was greater than larvae at all other salinity treatments. Therefore, the best results of hatching rate of fertilization eggs and larval survival were obtained when eggs and larvae were reared in the salinity of 34 psu.