The gastric evacuation rate of anchovy Engrauli japanicus in different growth stages in Huanghai Sea and East China Sea

SUN Yao; MA Zhi-min; LIU Yong; TANG Qi-sheng

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SUN Yao, MA Zhi-min, LIU Yong, TANG Qi-sheng. The gastric evacuation rate of anchovy Engrauli japanicus in different growth stages in Huanghai Sea and East China Sea[J]. Haiyang Xuebao, 2006, 28(3): 103-108.

Citation:

SUN Yao, MA Zhi-min, LIU Yong, TANG Qi-sheng. The gastric evacuation rate of anchovy Engrauli japanicus in different growth stages in Huanghai Sea and East China Sea[J]. Haiyang Xuebao, 2006, 28(3): 103-108.

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The gastric evacuation rate of anchovy Engrauli japanicus in different growth stages in Huanghai Sea and East China Sea

1.
Yellow Sea Fisheries Research Institute, Chinese Academy of Fisheres Sciences, Qingdao 266071, China
2.
Yellow Sea Fisheries Research Institute, Chinese Academy of Fisheres Sciences, Qingdao 266071, China;Ocean University of China, Qingdao 266003, China

Received Date: 2005-12-14
Rev Recd Date: 2006-03-20

Abstract

Abstract

On the basis of the ecological features of anchovy in the Huanghai Sea and the East China Sea, the GERs of 4 main developing periods were determined.The gastric evacuation rate curve was close to a beeline when the fish individual was smaller or the experiment was carried out under over-wintering temperature.With individual increase and temperature rise,the abovementioned curves gradually changed from linearity to typical exponential ones.The further synthetic assessment indicated that the exponential model was best suitable for describing the gastric evacuation rate curves,square root model came second. During high temperature of seeking food inshore,the GER was lower for small individual.Then,in spite of temperature decrease,the GER still obviously increased with body mass increment.When temperature was continuously declined to over-wintering one,the change brought by body mass was covered up by temperature and the GER declined to the lowest in all of 4 growth stages.After over-wintering,the fish migrated back to inshore waters for spawning.Because both of body mass and temperature significantly increased and sexg land of the determined fish had developed to IV or Vstage,which would increased demand to nutrition,the GER in this stage was larger than that of other 3 stages.
- gastric evacuation rate,
- different growth stage,
- anchovy

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References(33)

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