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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Foraging behaviors of sea stars, Marthasterias glacialis and Astropecten aranciacus (Asteroidea) and predator-prey interactions with warty venus clam, Venus verrucosa (Bivalvia)
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Foraging behaviors of sea stars, Marthasterias glacialis and Astropecten aranciacus (Asteroidea) and predator-prey interactions with warty venus clam, Venus verrucosa (Bivalvia)

机译：海星，Marthasterias glacialis和Astropecten aranciacus（Asteroidea）的觅食行为以及与疣状金星蛤，Verus verrucosa（Bivalvia）的捕食者与猎物的相互作用。

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Predatory behaviors of spiny sea star (Marthasterias glacialis) and red comb star (Astropecten aranciacus) preying on warty venus clam (Venus verrucosa) were investigated using specimens from the Aegean Sea. M. glacialis and A. aranciacus are common in the east Atlantic Ocean and the Mediterranean Sea and are serious predators of bivalves; V. verrucosa is widespread and one of the most valuable Atlantic-Mediterranean clams and a candidate species for aquaculture. Both sea stars are generalist feeders but they have quite different foraging behaviors; mainly M. glacialis is extra-oral while A. aranciacus intra-oral feeder. In two sets of experiments, capture and consumption steps of the predation process in relation to clam size and clam burrowing depth were examined separately for each sea star. Experiments were conducted under laboratory conditions with relatively large sea stars, and probabilities of capture, probabilities of consumption, time budgets, clam profitabilities (gain tissue mass per unit time, g h(-1)) and additionally feeding rates were investigated. Both sea stars could capture infaunal prey but in M. glacialis increasing clam burrowing depth influenced capture success and capture time. Generally clam size did not affect the handling times and consumption rates of M. glacialis. A. aranciacus were able to reach clams without being affected by the burrowing depth. Consumption rates decreased with clam size in A. aranciacus and ejection events of live clams after ingestion were observed frequently. Ejection rates increased with clam size and the period between ingestion and ejection was limited by the size of the clam; small clams could be retained for longer periods in the stomach of A. aranciacus. In both sea stars prey profitabilities were higher for large clams than for small clams, whereas prey profitabilities were similar between clam depths. Clam profitability differed considerably between M. glacialis and A. aranciacus due to highly different ingestion-eating types and allocated time budgets. (C) 2015 Elsevier B.V. All rights reserved.
机译：利用爱琴海标本调查了捕食疣状金星蛤（金星疣）的刺海星（Marthasterias glacialis）和红梳星（Astropecten aranciacus）的掠食行为。 M. glacialis和A. aranciacus常见于东大西洋和地中海，是双壳类动物的重要天敌。 V. verrucosa广泛存在，是大西洋-地中海最有价值的蛤one之一，也是水产养殖的候选物种。两只海星都是通才动物，但它们的觅食行为却大不相同。主要是冰川支原体是口腔外的，而阿拉伯曲霉是口腔内的饲养者。在两组实验中，针对每个海星分别检查了捕食过程中与蛤的大小和蛤穴深度有关的捕获和消耗步骤。在具有相对较大海星的实验室条件下进行了实验，并研究了捕获概率，消耗概率，时间预算，蛤仔获利能力（单位时间的组织质量，g h（-1））和摄食率。两只海星都可以捕获臭名昭著的猎物，但在冰川分枝杆菌中，蛤的洞穴深度增加会影响捕获成功和捕获时间。通常，蛤的大小不影响冰分枝杆菌的处理时间和消耗率。 Aranciacus能够到达蛤而不受洞穴深度的影响。食用率随着阿拉伯蛤。的蛤size大小而降低，并且经常观察到摄入后活蛤lam的弹出事件。蛤的大小使射血率增加，而从摄食到射出的时间受蛤的大小限制。小蛤lam可以在阿拉伯曲霉的胃中保留更长的时间。在两个海星中，大蛤than的猎物获利能力都比小蛤lam高，而蛤whereas深度之间的猎物获利能力相似。由于摄食类型和分配的时间预算差异很大，所以冰河分枝杆菌和阿拉伯曲霉的蛤的获利能力差异很大。 （C）2015 Elsevier B.V.保留所有权利。

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