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首页> 外文期刊>Polar biology >Predation impact of the notothenioid fish Trematomus bernacchii on the size structure of the scallop Adamussium colbecki in Terra Nova Bay (Ross Sea, Antarctica)
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Predation impact of the notothenioid fish Trematomus bernacchii on the size structure of the scallop Adamussium colbecki in Terra Nova Bay (Ross Sea, Antarctica)

机译：南极湾（南极洲罗斯海），类胡萝卜素鱼类伯纳克氏菌对扇贝Adamussium colbecki大小结构的捕食影响

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摘要

Biotic interactions are particularly relevant in stable environments, such as the High Antarctic areas. Among them, predation has a key role in structuring community and population variables, including size-frequency distribution. This study aims to quantify the impact of predation by the notothenioid fish Trematomus bernacchii on the Antarctic scallop Adamussium colbecki-size distribution. We developed a model of this impact that estimates the size distribution of the preyed scallop population, taking into account for the predator-size distribution, sex structure, and daily consumption. Comparing this size distribution of the preyed A. colbecki with the living populations at Terra Nova Bay (Ross Sea, Antarctica), we were able to detect a relevant impact of fish predation. Fish-size frequency resulted to be the major factor shaping preysize structure, with significant differences between predation by males and females. Our findings, given the key role of the two species in the littoral ecosystem of Terra Nova Bay (Antarctic Special Protected Area 161), fall into the framework of ecosystem management of High Antarctic coastal areas, particularly in the actual context of climate change, and increasing anthropogenic impact.
机译：生物相互作用在稳定的环境（例如南极高地区）中尤其重要。其中，捕食在构造社区和种群变量（包括大小频率分布）中起关键作用。这项研究的目的是量化捕食类胡萝卜素鱼类贝纳藻对南极扇贝金刚藻大小分布的影响。我们开发了这种影响的模型，该模型估计了捕食扇贝种群的大小分布，同时考虑了捕食者的大小分布，性别结构和日常消费。将捕食的拟南芥的大小分布与Terra Nova湾（南极罗斯海）的生活种群进行比较，我们能够发现鱼类捕食的相关影响。鱼的大小频率成为影响猎物大小结构的主要因素，雌雄之间的捕食差异显着。鉴于这两种物种在Terra Nova Bay（南极特殊保护区161）的沿海生态系统中的关键作用，我们的发现属于高南极沿海地区的生态系统管理框架，特别是在气候变化的实际情况下，以及增加人为的影响。

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