Effect of temperature on the egg and yolk-sac larval development of common pandora, Pagellus erythrinus
Effect of temperature on the egg and yolk-sac larval development of common pandora, Pagellus erythrinus
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DOI：
10.1007/s00227-004-1382-y
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发表时间：
2004-10-01
期刊：
影响因子：
2.4
通讯作者：
Kentouri, M
中科院分区：
文献类型：
--
作者：
Klimogianni, A;Koumoundouros, G;Kentouri, M
温度是鱼类个体发育最关键的环境因子之一，对鱼类的发育速率、存活率和表型可塑性具有种特异性和阶段特异性的影响。本文研究了在不同水温条件下，卵期为15 ℃、18 ℃和21 ℃，卵黄囊期为16 ℃、18 ℃和21 ℃，卵期和卵黄囊期幼虫的发育。与温度无关的发育热总和估计为高于阈值温度（低于该温度发育被阻止）555.6度-小时，即卵为7度C，卵黄囊幼虫期为12.1度C。在18 - 21 ℃时孵化率和存活率较高。在卵黄囊幼虫期结束时，测试温度之间的身体形态测量学差异显着（p< 0.05）。在16 ℃ ~ 18 ℃范围内，全长的增长率随温度的升高而增大，在18 ~ 21 ℃范围内，全长的增长率趋于稳定，与水温无关。估计的黄腹原螯虾卵黄囊期幼虫的Gompertz生长曲线为TL = 3.035中心点e（-0.505中心点e -0.041中心点t）（r（2）= 0.992）对于16 ℃，TL = 2.926中心点e（-0.509中心点e - 0.106中心点t）（r（2）= 0.991），对于18 ℃和TL = 2.801中心点e（-0.482中心点e - 0.104中心点t）（r（2）= 0.981）。卵黄囊期仔鱼对卵黄的利用率在18 ℃时较高。
Temperature is one of the most critical environmental factors for fish ontogeny, affecting the developmental rate, survival and phenotypic plasticity in both a species- and stage-specific way. In the present paper we studied the egg and yolk-sac larval development of Pagellus erythrinus under different water temperature conditions, 15 degreesC, 18 degreesC and 21 degreesC for the egg stage and 16 degreesC, 18 degreesC and 21 degreesC for the yolk-sac larval stage. The temperature-independent thermal sum of development was estimated as 555.6 degree-hours above the threshold temperature ( the temperature below which development is arrested), i.e. 7 degreesC for the egg and 12.1 degreesC for the yolk-sac larval stage. Higher hatching and survival rates occurred at 18 - 21 degreesC. At the end of the yolk-sac larval stage, body morphometry differed significantly ( p< 0.05) between the temperatures tested. The growth rate of the total length increased as temperature rose from 16 degrees C to 18 degrees C, while in the range of 18 - 21 degrees C it stabilized and was independent of water temperature. The estimated Gompertz growth curve for the yolk-sac larvae of P. erythrinus was TL = 3.035 center dot e (-0.505 center dot e -0.041 center dot t) (r(2)= 0.992) for the 16 degrees C, TL = 2.926 center dot e (- 0.509 center dot e - 0.106 center dot t) (r(2)= 0.991) for the 18 degrees C and TL = 2.801 center dot e (-0.482 center dot e - 0.104 center dot t) ( r(2)= 0.981) for the 21 degrees C treatment. The efficiency of vitelline utilization during the yolk-sac larval stage was higher at 18 degrees C.