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Position: Home > Articles > The feeding,excretion and point of no-return in larval cuttlefish Sepia pharaonis Journal of Dalian Ocean University 2011,26 (4) 352-355

虎斑乌贼幼体的摄食、排泄及不可逆点的研究

作  者:
谢晓晖;黄国光;梁伟峰;沈南南;赵会宏
单  位:
华南农业大学动物科学学院;惠州市大亚湾水产试验中心
关键词:
虎斑乌贼;不可逆点;摄食;排泄
摘  要:
将在南海水域采集的虎斑乌贼Sepia pharaonis的受精卵于室内条件下进行人工孵化,孵化水温为23~25℃,盐度为29.0,并采用恒温加热装置对天然海水进行温度控制,以研究不同水温梯度下新孵出的虎斑乌贼幼体的不可逆点。结果显示:幼体的生存上限温度为30~32℃;水温为24、26、28、30℃时,幼体的不可逆点为8、11、8、5~6 d。对5日龄的虎斑乌贼幼体进行摄食节律的观察,结果显示,虎斑乌贼幼体每个时间段都有摄食行为,但摄食高峰出现在凌晨和下午时段,呈现出明显的昼少夜多、晨昏双高峰趋势。对5日龄的虎斑乌贼幼体进行排泄规律的观察,发现幼体在一天中的每个时间段皆有排泄活动,饱食后20 h内基本排空,但排泄活动在凌晨时段比较频繁,呈现出明显的昼少夜多规律。
译  名:
The feeding,excretion and point of no-return in larval cuttlefish Sepia pharaonis
作  者:
XIE Xiao-hui1,HUANG Guo-guang2,LIANG Wei-feng2,SHEN Nan-nan2,ZHAO Hui-hong1 (1.College of Animal Science,South China Agriculture University,Guangzhou 510642,China;2.Guangdong Dayawan Fishery Development Center,Huizhou 516081,China)
关键词:
Sepia pharaonis;point of no return;feeding;excretion
摘  要:
The fertilized eggs of cuttlefish Sepia pharaonis collected from the South China Sea were artificially incubated indoor at water temperature of 23-25 ℃,and a salinity of 29.0.The point of no return(PNR) was studied in the newly hatched cuttlefish at constant water temperature of 24,26,28,30,and 32 ℃.The results showed that the larvae had the upper temperature limit of 30-32 ℃ for survival,and the PNR was 8 days at 24 ℃,11 days at 26 ℃,8 days at 28 ℃ and 5-6 days at 30 ℃.The feeding rhythm observation of 5-day old cuttlefish showed that the feeding peak was observed at dawn and afternoon,higher at night than in the day,though the larvae had constant feeding.The excretion of the 5-day old cuttlefish showed that the excretion peak was found at dawn,and the food was evacuation in 20 hours,though the cuttlefish had constant excretion.

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