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首页> 外文期刊>Estuarine Coastal and Shelf Science >Multidecadal dynamics of larval gobies Pomatoschistus spp. in response to environmental variability in a shallow temperate bay
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Multidecadal dynamics of larval gobies Pomatoschistus spp. in response to environmental variability in a shallow temperate bay

机译：幼虫虾虎鱼的十年代动力学。应对浅温带湾的环境变化

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摘要

Compared to commercial fish, there is relatively limited information available about the dynamics of non-commercial fish that very often play important structural and functional roles in marine ecosystems. Long-term investigations that provide quantitative estimates of the population dynamics as a function of environmental variability are needed to understand the ecology and role of the non-commercial fish in the ecosystem, and assist the ecosystem management where relevant. Here we analyze the inter-annual variability and long-term trends of the abundance of the larval non-commercial gobies Pomatoschistus spp. in a shallow coastal bay (Parrnu Bay, northeastern Baltic Sea) in 1959-2010, in relation to climate and prey field related variables. The abundance of larval Pomatoschistus spp. decreased over the last 50 years along with the concomitant decrease in the water transparency. The first appearance of larvae has shifted for about two weeks earlier and is mostly related to the timing of ice cover breakdown. However, some of the effects of the environmental forcing on larval fish may be obscured by the uncertainty of species identification of individuals of the genus Pomatoschistus at larval stage, and the investigated population of Pomatoschistus spp. consists of at least two species with slightly different ecologies and also environmental preferences.
机译：与商业鱼类相比，关于非商业鱼类动态的可用信息相对有限，非商业鱼类通常在海洋生态系统中扮演重要的结构和功能角色。需要进行长期调查，以便根据环境变化对种群动态进行定量估计，以了解非商业性鱼类在生态系统中的生态和作用，并在相关情况下协助生态系统管理。在这里，我们分析了幼虫非商业性虾虎鱼Pomatoschistus spp的数量的年际变化和长期趋势。 1959-2010年，在一个浅海沿海海湾（波罗的海东北部的帕尔努湾），与气候和猎物场相关的变量有关。丰富的幼虫Pomatoschistus spp。在过去的50年中，水的透明度下降了。幼虫的首次出现已经转移了大约两个星期，这主要与冰盖破裂的时间有关。然而，环境强迫对幼虫鱼类的某些影响可能被幼虫阶段的Pomatoschistus属个体的物种识别以及所调查的Pomatoschistus spp种群的不确定性所掩盖。至少由两个物种组成，这些物种的生态和环境偏好略有不同。

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