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首页> 外文期刊>Marine ecology progress series >First winter energy allocation in juvenile sablefish Anoplopoma fimbria, a fast growing marine piscivore
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First winter energy allocation in juvenile sablefish Anoplopoma fimbria, a fast growing marine piscivore

机译：第一次冬季能量分配在少年菊鱼Anoplopoma fimbria，一个快速种植的海洋柱状

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摘要

Understanding how energy allocation changes with ontogeny can provide insights about survival bottlenecks during early life stages for marine fishes. Energy allocation in juvenile fish before and during their critical first winter differs among species based on life history and foraging characteristics. To improve understanding of energy-size relationships in marine fish, we examined seasonal energy allocation in sablefish Anoplopoma fimbria, a species with unusually fast growth rates during early life. We assessed seasonal metrics of growth and energy storage in sablefish during their first 2 yr using field collections from 2016-2019. Based on growth rates estimated from length-frequency distributions, sablefish increased rapidly in size during autumn, and growth continued but slowed through their first winter as newly settled young-of-the-year. Mean energy density (ED, kJ g(-1)) declined over the winter, but total energy (TE, kJ ind.(-1)) increased significantly between October and March, reflecting positive overwinter growth. Relationships between energy storage and length were atypical for high-latitude marine fish in that they were steepest in March, indicating that relatively large fish grew during winter with minimal energy depletion, whereas relatively small fish grew but depleted their energy stores. We propose that improved foraging success for large fish may explain this pattern. Our results suggest that sablefish benefit from achieving large sizes prior to winter and support the hypothesis that the first winter can be a survival bottleneck for sablefish. This work informs our understanding of piscivore energy allocation during early life history and our understanding of possible sablefish recruitment drivers.
机译：了解随着组织发生的能量分配变化如何在海洋鱼类早期生命阶段期间提供关于存活瓶颈的见解。在关键的第一次冬季之前和期间的少年鱼中的能量分配不同，基于生命历史和觅食特征。为了提高海洋鱼类中的能量大小关系的理解，我们在早期生命期间检查了Sablefish Anoplopoma Fimbria的季节性能量分配，该物种具有异常快速的增长率。在2016-2019的现场收藏期间，我们评估了在前2年期间在Sablefish中的生长和能量储存的季节性指标。根据长度频率分布估计的增长率，秋季的大小速度迅速增加，并且在新安置的年度上年期间，通过他们的第一个冬季的增长持续很快。平均能量密度（ED，KJ G（-1））在冬季下降，但总能量（TE，KJ IND。（ - 1））在10月和3月之间大大增加，反映了积极的冬季增长。能量储存和长度之间的关系对于高纬度的海洋鱼类而言，他们在3月份是陡峭的，表明冬季的冬季含量相对大的鱼类，耗尽最小，而且相对较小的鱼类增长但耗尽了它们的能量储存。我们建议改善大鱼的觅食成功可以解释这种模式。我们的结果表明，圣诞草鱼在冬季之前取得了大规模，支持第一个冬天可以成为圣诞鱼鱼的生存瓶颈。这项工作可通知我们对早期生命历史期间对Piscivore能量分配的理解，以及我们对可能的令人毛骨鱼招聘司机的理解。

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