Negative effect of turbidity on prey capture for both visual and non‐visual aquatic predators,Journal of Animal Ecology

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Negative effect of turbidity on prey capture for both visual and non‐visual aquatic predators
Journal of Animal Ecology ( IF 3.5 ) Pub Date : 2020-09-26 , DOI: 10.1111/1365-2656.13329
Jean C G Ortega ₁ , Bruno R S Figueiredo ₂ , Weferson J da Graça _{3,

4} , Angelo A Agostinho _{3,

4} , Luis M Bini ₅

Affiliation

Turbidity plays an important role in aquatic predator-prey interactions. Increases in turbidity are expected to reduce prey capture rates, especially for visually oriented predators. However, there is also evidence indicating that turbidity may have little or no effect on predation rates. Here, we conducted a systematic review and meta-analysis of the relationship between turbidity and capture rate. We explored possible sources of heterogeneity in the effect sizes (capture strategy, predator's body size, relative eye size and turbidity range in the experiments) while controlling for the dependence among effects sizes and phylogenetic relationships among predator species. We found a consistent negative effect of turbidity on prey capture and that turbidity range (manipulated in the experiments) was the main factor accounting for between-study variation in effect sizes. Also, capture rates of both visually and non-visually oriented predators decreased with an increase in turbidity. In addition, for visually oriented fish predators, the relative eye size did not influence the effect sizes. Despite the paucity of studies for some groups of aquatic predators (mainly in tropical regions), we provide corroborative evidence that turbidity is a critical environmental factor controlling predator-prey interactions. This result is especially relevant considering that changes in turbidity is a human-induced pervasive environmental alteration resulted from, among other mechanisms, runoff after deforestation, eutrophication or oligotrophication in reservoir cascades, which imply changes in predator-prey interactions.

中文翻译：

浊度对视觉和非视觉水生捕食者捕食的负面影响

浊度在水生捕食者-猎物相互作用中起着重要作用。预计浊度的增加会降低猎物的捕获率，特别是对于视觉导向的捕食者。然而，也有证据表明，浊度可能对捕食率几乎没有影响。在这里，我们对浊度和捕获率之间的关系进行了系统回顾和荟萃分析。我们探索了效应大小（捕获策略、捕食者的身体大小、相对眼睛大小和实验中的浊度范围）异质性的可能来源，同时控制了效应大小之间的依赖性和捕食者物种之间的系统发育关系。我们发现浊度对猎物捕获有一致的负面影响，浊度范围（在实验中操纵）是影响研究间效应大小变化的主要因素。此外，视觉和非视觉导向捕食者的捕获率随着浊度的增加而降低。此外，对于视觉导向的鱼类捕食者，相对眼睛大小不影响效果大小。尽管对某些水生捕食者群体（主要在热带地区）的研究很少，但我们提供了确凿的证据，表明浊度是控制捕食者-猎物相互作用的关键环境因素。考虑到浊度的变化是人为引起的普遍环境改变，除其他机制外，森林砍伐后的径流，

更新日期：2020-09-26

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