Temperature dependent otolith growth of larval and early juvenile Atlantic cod (Gadus morhua)
Temperature dependent otolith growth of larval and early juvenile Atlantic cod (Gadus morhua)
复制标题
大西洋鳕鱼幼体和早期幼鱼的温度依赖性耳石生长（Gadus morhua）
DOI：
10.1006/jmsc.2001.1170
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发表时间：
2002
影响因子：
4.5
通讯作者：
G. Nyhammer
中科院分区：
文献类型：
--
作者：
Erling Otterlei;A. Folkvord;G. Nyhammer
两个大西洋鳕鱼种群的后代，在不同的温度下饲养的耳石（lapillus）大小鱼的大小关系进行了研究。在高温下饲养的幼虫和早期青少年（快速增长），在给定的长度比在低温下饲养的鱼（缓慢增长）有更大的耳石。然而，在一个给定的温度组内，生长较快的鳕鱼往往有比例较小的耳石，虽然差异并不总是显着的。此外，挪威沿海鳕鱼的耳石半径较大，在给定的鱼的长度，相比，东北北极鳕鱼。在变态（12毫米）发病时发生的异速耳石大小的鱼的大小关系的个体发育转变。lapillus半径的平均每日耳石生长随着温度的升高而增加，从4到14°C，是大小依赖性的，并在幼虫长度约25 mm时达到峰值。在孵化时的lapillus半径与两个种群在第56天的幼虫长度相关性很差，这表明快速增长的潜力可能不一定反映在孵化时的性状上。温度，股票和个体发育的影响进行了讨论，关于耳石生长和鱼类生长之间的比例恒定的假设。
The otolith (lapillus) size-fish size relationship was examined for offspring of two Atlantic cod stocks, reared at different temperatures. Larvae and early juveniles reared at high temperatures (fast growing), had larger otoliths at a given length than fish reared at low temperatures (slow growing). Within a given temperature group, however, faster growing cod tended to have proportionally smaller otoliths, although the difference was not always significant. Moreover, the otolith radius of Norwegian coastal cod was larger, at given fish lengths, compared to that of the northeast Arctic cod. An ontogenetic shift in the allometric otolith size-fish size relationship occurred at onset of metamorphosis (12 mm). Mean daily otolith growth of the lapillus radius increased with increasing temperature from 4 to 14°C and was size dependent and peaked at a larval length of about 25 mm. The radius of the lapillus at hatching was poorly correlated with larval length at day 56 for both stocks, suggesting that the potential for fast growth may not necessarily be reflected in traits present at hatching. The effects of temperature, stock and ontogeny are discussed with regard to the assumption of constant proportionality between otolith growth and fish growth.