Predation differences between wild and hatchery-reared tiger puffer Takifugu rubripes juveniles in a salt pond mesocosm
Predation differences between wild and hatchery-reared tiger puffer Takifugu rubripes juveniles in a salt pond mesocosm
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盐池中生态环境中野生和孵化场饲养的红鳍东方鲀幼鱼的捕食差异
DOI：
10.2331/suisan.73.461
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发表时间：
2007
影响因子：
0.4
通讯作者：
Yoh
中科院分区：
文献类型：
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作者：
D. Shimizu;K. Sakiyama;Y. Sakakura;T. Takatani;Yoh
为了比较捕食对红鳍东方鲀（Takifugu rubripes）的野生和孵化饲养幼仔的释放后死亡率的影响，我们在半自然环境中使用盐池围隔（5，300 m2）进行了释放实验。我们把孵化场饲养的幼鱼和野生幼鱼一起放进有捕食者的池塘里。孵化场饲养的幼鱼存活率（56.0 ‰）显著低于野生幼鱼（86.0 ‰）。这些结果表明，捕食是一个主要原因释放后死亡的这个物种。我们还比较了游泳后立即释放到实验池（33.5厘米深）的野生和孵化饲养的青少年的深度。野生青少年游泳池底部附近，并表现出底部居住的行为，但孵化器饲养的青少年游泳主要是在水柱。在围隔生态系统的释放实验中也观察到类似的行为变化。我们还比较了河豚毒素（TTX）的身体成分，这是在野生青少年中检测到的，但孵化器饲养的青少年没有检测到TTX。我们的结论是，捕食后不久释放和行为缺陷的孵化器饲养的少年，如游泳行为和摄食行为的变化，可能是死亡的主要原因，在该物种的股票增强计划。
To compare the eŠects of predation on the post-release mortality of wild and hatchery-reared juveniles of the tiger puŠer Takifugu rubripes we conducted release experiments in a semi-natural environment using a salt pond mesocosm (5,300 m2). We released hatchery-reared juveniles together with wild juveniles into a pond with predators. Survival of the hatchery-reared juveniles (56.0) was signiˆcantly lower than that of the wild juveniles (86.0). These results indicate that predation is a major cause of post-release mortality of this species. We also compared swimming depths of wild and hatchery-reared juveniles immediately after release into an experimental tank (33.5 cm in depth). Wild juveniles swam near the tank bottom and showed bottom-dwelling behavior, but hatchery-reared juveniles swam mostly in the water column. Similar behavioral diŠerences were observed in release experiments in a mesocosm. We also compared body compositions of tetrodotoxin (TTX), which was detectable in the wild juveniles, but hatchery-reared juveniles had no detectable TTX. We concluded that predation shortly after release and behavioral defects in hatchery-reared juveniles, such as changes in swimming behavior and feeding behavior, might be among the main causes of mortality in the stock enhancement program of this species.
K. Tsukamoto：“耳石在鲑鱼迁徙研究中的应用”（日本生理学与生态学）。
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网箱养殖河豚鱼的毒性
DOI：
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发表时间：
2004
期刊：
J.Food Hyg.Soc.Japan 45
影响因子：
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作者：
T.Noguchi;T.Takatani;O.Arakawa
通讯作者：
O.Arakawa