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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Starvation and a conspecific competitor influence multiple predator effects in a swimming crab (Portunus trituberculatus) - Manila clam (Ruditapes philippinarum) foraging system
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Starvation and a conspecific competitor influence multiple predator effects in a swimming crab (Portunus trituberculatus) - Manila clam (Ruditapes philippinarum) foraging system

机译：饥饿和同种竞争者影响游泳蟹（Portunus trituberculatus）-马尼拉蛤（Ruditapes philippinarum）觅食系统中的多种捕食者效应

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To investigate the effect of starvation (0-12 days) on multiple predator effects and the mechanisms driving these effects, we established swimming crab (Portunus trituberculatus) - Manila clam (Ruditapes philippinarum) foraging systems in the laboratory. Specifically, we quantified predation rate, foraging behaviors, and encounter behaviors between predators under different foraging system treatments. The main results were as follows: (1) Changes in multiple predator effects were related to fighting between swimming crab individuals resulting from different starvation regimes. Non -independent multiple predator effects were observed that reduced the foraging success of swimming crabs in short-term starvation treatments. However, independent multiple predator effects were observed in normally fed and long-term starvation treatments, and the foraging success of swimming crabs did not change. (2) Under short-term starvation, a high probability of fighting between swimming crabs significantly increased the proportion of time spent handling clams, while the probability of consumption upon capture of clams significantly decreased. However, the foraging behaviors of swimming crabs were not significantly altered by a low probability of fighting upon encounter under no-starvation and long-term starvation. (3) The pattern of foraging time budget of swimming crabs did not change significantly in the presence of conspecific competitors under any starvation level. The present study provides a foundation for future research on the interaction of conspecific predators, which can be used to improve aquaculture systems.
机译：为了研究饥饿（0-12天）对多种捕食者影响的影响以及驱动这些影响的机制，我们在实验室中建立了游泳蟹（Portunus trituberculatus）-马尼拉蛤（Ruditapes philippinarum）觅食系统。具体来说，我们量化了捕食率，觅食行为以及在不同觅食系统处理下捕食者之间的encounter碰行为。主要结果如下：（1）多种捕食者作用的变化与不同饥饿制度导致的游泳蟹个体之间的战斗有关。观察到非独立的多种捕食者效应降低了短期饥饿治疗中游泳蟹的觅食成功率。然而，在正常的喂养和长期饥饿的治疗中，观察到了独立的多种捕食者效应，游泳蟹的觅食成功没有改变。 （2）在短期饥饿状态下，游泳蟹之间发生争斗的可能性很高，显着增加了处理蛤lam的时间比例，而捕获蛤consumption后食用的可能性大大降低。然而，在没有饥饿和长期饥饿的情况下，由于遇到争斗的可能性低，游泳蟹的觅食行为并没有明显改变。 （3）在任何饥饿水平下，有同种竞争者存在时，游泳蟹觅食时间预算的模式没有明显改变。本研究为今后研究同种捕食者之间的相互作用提供了基础，可用于改进水产养殖系统。

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