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Personality‐dependent inter‐ and intraspecific foraging competition in the invasive round goby, Neogobius melanostomus
Journal of Fish Biology ( IF 1.7 ) Pub Date : 2021-01-18 , DOI: 10.1111/jfb.14652
Philip Ericsson 1, 2 , Anders Persson 1 , Jane W. Behrens 3 , Tomas Brodin 4 , Philipp Emanuel Hirsch 5 , Anna Sundelin 6 , Mikael Deurs 2 , Lisa W. Friesen 1, 7 , P. Anders Nilsson 1, 8
Affiliation  

This study examines the impact of boldness on foraging competition of the highly invasive round goby Neogobius melanostomus Pallas 1815. Individual risk tolerance, or boldness, was measured as the time to resume movement after a simulated predation strike. Fish that resumed movement faster were categorized as "bold", fish that took more time to resume movement were categorized as "shy", and those who fell in between these two categories were determined to have "intermediate" boldness. Competitive impacts of boldness in N. melanostomus were determined in a laboratory foraging experiment in which interspecific (juvenile Atlantic cod Gadus morhua Linnaeus 1758) and intraspecific (intermediate N. melanostomus) individuals were exposed to either bold or shy N. melanostomus competitors. G. morhua consumed fewer prey when competing with bold N. melanostomus than when competing with shy N. melanostomus, whereas intermediately bold N. melanostomus foraging was not affected by competitor boldness. Bold and shy N. melanostomus consumed similar amounts of prey, and the number of interactions between paired fish did not vary depending on the personality of N. melanostomus individuals. Hence, intraspecific foraging competition was not found to be personality dependent. This study provides evidence that individual differences in boldness can mediate competitive interactions in N. melanostomus, however results also show that competition is also governed by other mechanisms which require further study. This article is protected by copyright. All rights reserved.

中文翻译:

侵入性圆形虾虎鱼 Neogobius melanostomus 中个性依赖的种间和种内觅食竞争

本研究考察了胆量对高度侵入性圆形虾虎鱼 Neogobius melanostomus Pallas 1815 觅食竞争的影响。个体风险承受能力或胆量被衡量为模拟捕食袭击后恢复运动的时间。恢复运动较快的鱼被归类为“大胆”,恢复运动需要更多时间的鱼被归类为“害羞”,而那些介于这两个类别之间的鱼被确定为具有“中等”的胆量。在实验室觅食实验中确定了大胆对黑口猪笼草的竞争影响,其中种间(幼年大西洋鳕鱼 Gadus morhua Linnaeus 1758)和种内(中间黑口猪笼草)个体暴露于大胆或害羞的黑口猪笼草竞争者。G。morhua 与胆大的黑口猪笼草竞争时比与害羞的黑口猪笼草竞争时消耗的猎物更少,而中等大胆的黑口猪笼草的觅食不受竞争者胆量的影响。大胆而害羞的黑口猪笼草消耗了相似数量的猎物,配对鱼之间的互动次数不会因黑口猪笼草个体的个性而有所不同。因此,未发现种内觅食竞争与个性有关。这项研究提供了证据表明,个体的大胆差异可以调节黑口猪笼草的竞争相互作用,但结果还表明,竞争也受其他需要进一步研究的机制的支配。本文受版权保护。版权所有。而中等大胆的黑口猪笼草觅食不受竞争对手大胆的影响。大胆而害羞的黑口猪笼草消耗了相似数量的猎物,配对鱼之间的互动次数不会因黑口猪笼草个体的个性而有所不同。因此,未发现种内觅食竞争与个性有关。这项研究提供了证据表明,个体的大胆差异可以调节黑口猪笼草的竞争相互作用,但结果还表明,竞争也受其他需要进一步研究的机制的支配。本文受版权保护。版权所有。而中等大胆的黑口猪笼草觅食不受竞争对手大胆的影响。大胆而害羞的黑口猪笼草消耗了相似数量的猎物,配对鱼之间的互动次数不会因黑口猪笼草个体的个性而有所不同。因此,未发现种内觅食竞争与个性有关。这项研究提供了证据表明,个体的大胆差异可以调节黑口猪笼草的竞争相互作用,但结果还表明,竞争也受其他需要进一步研究的机制的支配。本文受版权保护。版权所有。配对鱼之间的互动次数不会因黑口猪笼草个体的个性而有所不同。因此,未发现种内觅食竞争与个性有关。本研究提供的证据表明,个体的大胆差异可以调节黑口猪笼草的竞争相互作用,但结果还表明,竞争也受其他需要进一步研究的机制的支配。本文受版权保护。版权所有。配对鱼之间的互动次数不会因黑口猪笼草个体的个性而有所不同。因此,未发现种内觅食竞争与个性有关。这项研究提供了证据表明,个体的大胆差异可以调节黑口猪笼草的竞争相互作用,但结果还表明,竞争也受其他需要进一步研究的机制的支配。本文受版权保护。版权所有。然而,结果还表明,竞争也受其他需要进一步研究的机制的支配。本文受版权保护。版权所有。然而,结果还表明,竞争也受其他需要进一步研究的机制的支配。本文受版权保护。版权所有。
更新日期:2021-01-18
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