Effects of Water Temperature on Bluefin Tuna Spawning Biology in Captivity
Effects of Water Temperature on Bluefin Tuna Spawning Biology in Captivity
复制标题
水温对圈养蓝鳍金枪鱼产卵生物学的影响
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
H. Imaizumi
中科院分区：
文献类型：
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作者：
S. Masuma;N. Tezuka;M. Koiso;T. Jinbo;Takayuki Takebe;Hideo Yamazaki;H. Obana;K. Ide;H. Nikaido;H. Imaizumi
*1 摘要 研究了水温对圈养蓝鳍金枪鱼产卵周期、卵大小和产卵时间的影响。 5月13日至11月10日期间观察到蓝鳍金枪鱼产卵，这比之前报告的蓝鳍金枪鱼产卵持续时间更长。产卵模式表明，产卵的开始和持续时间受到产卵前水温(WT)从23 ℃开始的快速变化的影响。 WT从23℃开始快速增加会导致早期产卵，并且持续时间较长。平均蛋直径为0.90~1.06毫米，最小蛋尺寸为0.83毫米。卵直径与WT之间存在很强的反比关系。在这项研究中，观察到产卵时间为 17:31-23:36。过去的研究中尚未有蓝鳍金枪鱼在 23:30 产卵的报道。观察到 WT 和产卵时间之间存在很强的相关性（随着 WT 的增加，产卵时间变得更晚）。在这项研究中，很明显，水温强烈影响蓝鳍金枪鱼的产卵周期、卵大小和产卵时间。这些信息对于管理蓝鳍金枪鱼亲鱼至关重要。
*1 Abstract Effects of water temperature on the periodicity of spawning, egg size, and spawning time were examined for the bluefin tuna Thunnus orientalis in captivity. Spawning of bluefin tuna was observed for the period between May 13 and November 10, which is a longer spawning duration than the previous reports for bluefin. The spawning pattern suggested that the initiation and duration of spawning are affected by a rapid change of water temperature (WT) from 23 ℃before spawning. The quick increase in the WT from 23 ℃induces early spawning and it continues for a longer duration. Mean egg diameter ranged from 0.90~1.06 mm and the minimum egg size was 0.83 mm. There was a strong inverse relationship between egg diameter and WT. In this study spawning was observed between 17:31-23:36. Spawning of bluefin as late as 23:30 has not been reported in past studies. A strong correlation between WT and spawning time was observed (as WT increased the time of spawning became later). In this study, it was apparent that water temperature strongly influenced the periodicity of spawning, egg size, and spawning time of bluefin. This information could be vital for managing broodstock of bluefin tuna.