摘要
龙虎斑是由棕点石斑鱼（Epinephelus fuscoguttatus♀）和鞍带石斑鱼（Epinephelus lanceolatus♂）的杂交种。研究水温及盐度在骤变和渐变情况下龙虎斑的存活和摄食情况，结果表明：龙虎斑在温度为14～35℃的海水中均能存活和摄食，最适宜温度环境为25～35℃；温度从30℃骤变至20、25、35℃时，龙虎斑100%存活；从30℃骤变至10℃和15℃时，龙虎斑全部死亡；水温从30℃开始渐变，下降幅度为1℃/d，当下降至24℃时摄食减少，13℃时停止摄食，下降至11℃时出现死亡。龙虎斑在盐度为1～55的海水中均能存活和摄食，摄食适宜海水盐度为4～45；盐度从30骤变至5、10、15、20、25、35、40、45、50、55等盐度时，龙虎斑100%存活，骤变至0时，4 h内存活率100%，16 h存活率55.5%；盐度从30渐变，每天降低2，降至6后，每天降低1，盐度降到1时，龙虎斑的活动和摄食明显减少，渐变至0时，36 h出现死亡，48 h内全部死亡。
Dragon-tiger grouper, a grouper hybrid from Epinephelus fuscoguttatus （♀） × Epinephelus lanceolatus （♂） has wide prospects in artificial marine fish aquaculture. The effects of temperature and salinity on the survival rate and food intake of dragon-tiger groupers were investigated. The results showed that dragon-tiger groupers can survive and consume food at 16-35℃with the optimum range at 25-35℃. Under sudden temperature changes, dragon-tiger groupers all died at 10-15℃ in 24 hours. However, at 20-35℃ the survival rate was 100%. When temperature gradually declines, food intake reduced at 24℃and stopped at 13℃. Finally, death occurred at 11℃. Dragon-tiger groupers can survive and feed in salinity 1-55 and the suitable salinity in 4-45. Under sudden salinity change from 30 to 5, 10, 15, 20, 25, 35, 40, 45, 50, 55, the survival rate of dragon-tiger groupers was 100%. Under gradual salinity decrease conditions, dragon-tiger groupers significantly reduced its activity and food intake when salinity dropped to 1, and the dragon-tiger groupers began to die in 36 h and all of them died out within 48 h when salinity dropped to 0.
出处
《广东海洋大学学报》
CAS
2013年第4期22-26,共5页
Journal of Guangdong Ocean University
基金
广东省海洋渔业科技推广专项(A201100I03
A201108B04
A201208G02)
关键词
龙虎斑
存活
摄食
温度
盐度
temperature
salinity
survivorship
food intake
dragon-tiger grouper （Epinephelus fuscoguttatus♀×Epinephelus lanceolatus♂）
