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RISS 인기검색어
- 검색키워드
- 저자 : Yoshifumi Sawada (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
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Effect of Starvation on Survival Rate and Body Composition of
Yang-Su Kim*, Shinj i Yamamoto, Chihiro Aoki, Amal Biswas,Yoshifumi Sawada, Kenj i Takii and Osamu Murata 전남대학교 수산과학연구소 2014 수산과학연구소논문집 Vol.22 No.-
The effect of starvation on Pacific bluefin tuna Thunnus orientalis (PBT) juveniles was investigated according to two stages, weaning stage (0.8±0.2 g) at 25 days post hatching (dph) and transportation stage (3.8±1.2 g) at 36 dph. The juveniles were then transferred (0 h) into each tank from the mass production tank. Starved PBT juveniles were collected from one random tank at 3, 6, 9, 29 and 93 h (25 dph), and 12, 24, 36, 48, 60 and 72 h (36 dph). The survival rate of 25 dph remained above 80% until 78 h: moreover the standard length and weight were increased until 9 h of starvation. However, the survival rate of 36 dph rapidly decreased to 42% at 48 h, and the standard length and weight were gradually decreased until the end of starvation. Whole body lipid and glycogen were rapidly consumed initially and moreover, the protein and energy contents were gradually and steadily decreased during starvation in both experiments. When compared to the linear regression analysis between energy consumption and starvation time, there was a statistical difference between the experiments (P < 0.05). These results suggest that energy mobilization differs between the weaning (25 dph) and transportation stages (36 dph). Further, it is assumed that the juveniles are more sensitive to starvation at 25 dph.
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사료내 단백원의 차이가 참돔(Pagrus major)과 교잡어 (P. major ♀×Acanthopagrus schlegeli ♂)의 성장과 에너지수지에 미치는 영향
김양수,Biswajit Kumar Biswas,Amal Biswas,지승철,정관식,Osamu Murata,Yoshifumi Sawada,Kenji Takii 전남대학교 수산과학연구소 2013 수산과학연구소논문집 Vol.21 No.-
This study investigated the growth and energy partition of juvenile red sea bream Pagrus major (159.3±9.5 g; RSB) and hybrid sea bream P. major (♀)×Acanthopagrus schlegeli (♂) (144.8± 10.0 g; F1) on satiation feeding of fish meal (FM) and soybean meal (SM) based isocaloric diets (21.1 kJ/g diet) at 21.6℃ water temperature for 4 weeks. Two sea bream species offered no significant influence on final mean body weight, condition factor, viscera somatic index and apparent digestibility coefficient in both dietary groups, and both fish species were increased the relative stomach and intestine weight in SM than that in FM. RSB fed FM diet showed larger growth rate, feed efficiency, protein efficiency ratio, and apparent nutrients and energy retention efficiency than that fed SM diet, but this was inverse in F1. Whereas, Energy partitions of RSB and F1 in FM and SM dietary groups observed a similar tendency on fecal, digestible, urinary, metabolizable and standard metabolizable energy. However, retained energy of RSB in fed FM diet higher than that in SM, was inverse in F1. Moreover, heat increment plus voluntary activity energy consumption of F1 fed SM diet compare with fed FM diet lower than that of RSB. These results suggest that RSB and F1 has similar the energy consumption metabolism for digestive absorption in both diets, however, the energy accumulation pattern from absorbed nutrients appear to differ on SM fed.
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