Tight spatial coupling of a marine predator with soniferous fishes: Using joint modelling to aid in ecosystem approaches to management
Tight spatial coupling of a marine predator with soniferous fishes: Using joint modelling to aid in ecosystem approaches to management
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DOI：
10.1111/ddi.13746
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发表时间：
2023-06-09
影响因子：
4.6
通讯作者：
Nye，Janet A.
中科院分区：
文献类型：
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作者：
Roberts，Sarah M.;Jacoby，Ann-Marie;Nye，Janet A.
目的了解海洋生物的分布对于有效管理面临各种人为威胁的高流动性海洋捕食者至关重要。最近的工作主要集中在模拟海洋哺乳动物的分布和丰度与一系列环境变量的关系。然而，生物相互作用在很大程度上可以驱动这些捕食者的分布。我们的目标是确定生物和非生物变量如何影响特定海洋捕食者宽吻海豚（Tursiops truncatus）的分布和丰度，使用多种建模方法并进行广泛的文献综述。地理位置北大西洋西部大陆架。方法采用集合建模方法，结合广泛的海洋哺乳动物、鱼类和无脊椎动物调查，评估环境和其他海洋物种对预测沿海和近海宽吻海豚生态型分布的相对重要性和能力。我们通过对整个地区海豚猎物的系统文献回顾来证实模型结果，以帮助解释猎物可用性驱动的模式，并揭示可能不一定是捕食者-猎物关系的新模式。结果我们发现，沿海宽吻海豚的分布与一科鱼类有关，即海吻鱼科或鼓科，当只使用鱼类与只使用环境变量时，预测结果略有改善。文献综述表明，这种紧密耦合可能是一种捕食者-猎物关系。相比之下，近海海豚的分布与环境变量的关系更强，仅使用环境模型的预测效果更好。正如文献综述所揭示的那样，这可能是由于鱼类和无脊椎动物调查中捕获的动物与近海海豚的主要猎物（特别是鱿鱼）之间的不匹配。将猎物种类纳入分布模型，特别是沿海宽吻海豚的分布模型，有助于了解生态关系和预测海洋捕食者的分布。
AimUnderstanding the distribution of marine organisms is essential for effective management of highly mobile marine predators that face a variety of anthropogenic threats. Recent work has largely focused on modelling the distribution and abundance of marine mammals in relation to a suite of environmental variables. However, biotic interactions can largely drive distributions of these predators. We aim to identify how biotic and abiotic variables influence the distribution and abundance of a particular marine predator, the bottlenose dolphin (Tursiops truncatus), using multiple modelling approaches and conducting an extensive literature review.LocationWestern North Atlantic continental shelf.MethodsWe combined widespread marine mammal and fish and invertebrate surveys in an ensemble modelling approach to assess the relative importance and capacity of the environment and other marine species to predict the distribution of both coastal and offshore bottlenose dolphin ecotypes. We corroborate the modelled results with a systematic literature review on the prey of dolphins throughout the region to help explain patterns driven by prey availability, as well as reveal new ones that may not necessarily be a predator–prey relationship.ResultsWe find that coastal bottlenose dolphin distributions are associated with one family of fishes, the Sciaenidae, or drum family, and predictions slightly improve when using only fish versus only environmental variables. The literature review suggests that this tight coupling is likely a predator–prey relationship. Comparatively, offshore dolphin distributions are more strongly related to environmental variables, and predictions are better for environmental‐only models. As revealed by the literature review, this may be due to a mismatch between the animals caught in the fish and invertebrate surveys and the predominant prey of offshore dolphins, notably squid.Main ConclusionsIncorporating prey species into distribution models, especially for coastal bottlenose dolphins, can help inform ecological relationships and predict marine predator distributions.