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The effect of water temperature on gut mass and digestive enzyme activity in sea cucumber Apostichopus japonicus, including relative gut mass (RGM), amylase, lipase, pepsin and trypsin activities were studied at temperatures of 7, 14,
21, and 28°C over a period of 40 days. Results show that RGM significantly decreased after 40 days at 21°C and markedly decreased
over the whole experiment period at 28°C; however, no significant effect of duration was observed at 7 or 14°C. At 14°C, trypsin
activity significantly decreased over 10 and 20 days, then increased; amylase and trypsin activity significantly decreased
after 40 days at 28°C. However, no significant effect of duration was found on amylase, pepsin or trypsin activities in the
other temperature treatment groups. At 28°C, lipase activity peaked in 20 days and then markedly decreased to a minimum at
the end of the experiment. On the other hand, pepsin activity at 28°C continuously increased over the whole experimental period.
Principle component analysis showed that sea cucumbers on day 40 in the 21°C group and in the previous 20 days in the 28°C
group were in the prophase of aestivation. At 28°C, sea cucumbers aestivated at 30–40 days after the start of the experiment.
It is concluded that the effect of temperature on the digestion of A. japonicus is comparatively weak within a specific range of water temperatures and aestivation behavior is accompanied by significant
changes in RGM and digestive enzyme activities. 相似文献
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为了调查刺参(Apostichopus japonicus)免疫机能的周年变化,初步探索刺参免疫的规律,于2006年7月至2007年6月对刺参体腔液几种免疫指标进行了周年测定.结果显示,周年内刺参体腔液内几种酶类显著变化的转折点为9月、10月,1月,2月、4月和5月.刺参体腔液几种酶类活性变化与温度和盐度等环境因素并不存在相关关系,因此推测这些显著变化并不是单一的温度、盐度等环境因素作用的结果,综合分析,其变化原因可能与刺参的夏眠、生理及繁殖等因素的作用有关. 相似文献
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