Oceanographic drivers of offspring abundance may increase or decrease reproductive variance in a temperate marine fish
Oceanographic drivers of offspring abundance may increase or decrease reproductive variance in a temperate marine fish
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后代丰度的海洋学驱动因素可能会增加或减少温带海洋鱼类的生殖差异
DOI：
10.1111/j.1365-294x.2012.12002.x
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发表时间：
2012
影响因子：
4.9
通讯作者：
Russell W. Markel
中科院分区：
文献类型：
--
作者：
K. Lotterhos;Russell W. Markel
在不确定环境中繁殖的物种中，平均繁殖成功率（大量的新成员）和繁殖成功率的方差（成年人是否贡献了更多的后代）之间的关系可能并不简单，因为随机环境过程会在成年人之间产生高变异的繁殖成功率。在这项研究中，我们调查了海洋学，繁殖成功和繁殖变异之间的关系，黑岩鱼，黑岩鱼，一种长寿的温带珊瑚鱼，具有远洋幼虫。我们量化了黑岩鱼招聘，遗传多样性和耳石微结构的增长率超过5年（2005-2009年），在此期间的海洋条件不同。我们使用互相关来确定时间窗口，在此期间，海洋学变量与新兵的丰度或遗传多样性显著相关。我们发现，温暖的海洋温度与大量的新兵以及繁殖者的有效数量呈正相关。与此相反，在解决沿海上升流的强度呈正相关，每年丰富的新兵，但呈负相关的有效数量的繁殖。幼虫的生长率的解释大大超过温度上升流，并建议温度影响生存通过增长，而上升流影响生存通过运输。我们的研究结果表明，寒冷的海洋温度和强烈的上升流导致了类似抽奖的过程对黑岩鱼种群的影响，尽管新兵的丰度很高。我们建议，解耦的平均值和方差的繁殖成功可能是生物体的特点，繁殖到不确定的环境。
In species that reproduce into uncertain environments, the relationship between mean reproductive success (the abundance of new recruits) and the variance in reproductive success (whether adults contribute disproportionally more offspring) may not be straightforward because of stochastic environmental processes that create high variance in reproductive success among adults. In this study, we investigated the relationships between oceanography, reproductive success and reproductive variance in the black rockfish, Sebastes melanops, a long‐lived temperate reef fish with pelagic larvae. We quantified black rockfish recruitment, genetic diversity and growth rates from otolith microstructure over 5 years (2005–2009) during which oceanographic conditions differed. We used cross‐correlations to determine windows of time during which oceanographic variables were significantly correlated with the resulting abundance or genetic diversity of recruits. We found that warmer ocean temperatures were positively correlated with the abundance of recruits, as well as the effective number of breeders. In contrast, the strength of coastal upwelling during settlement was positively correlated with the annual abundance of new recruits, but was negatively correlated with the effective number of breeders. Larval growth rates were explained substantially more by temperature than by upwelling and suggested that temperature affected survival through growth, while upwelling affected survival through transport. Our results indicated that cold ocean temperatures and intense upwelling caused sweepstakes‐like processes to operate on black rockfish populations, despite high abundances of recruits. We propose that a decoupling of the mean and variance in reproductive success may be characteristic of organisms that reproduce into uncertain environments.