CONVERGENCE IN THE FEEDING MECHANICS OF ECOMORPHOLOGICALLY SIMILAR SPECIES IN THE CENTRARCHIDAE AND CICHLIDAE
CONVERGENCE IN THE FEEDING MECHANICS OF ECOMORPHOLOGICALLY SIMILAR SPECIES IN THE CENTRARCHIDAE AND CICHLIDAE
复制标题
丽鱼科和丽鱼科生态相似物种摄食机制的趋同
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
E. Brainerd
中科院分区：
文献类型：
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作者：
S. Norton;E. Brainerd
我们验证了一种假设，即具有相似生态形态模式的鱼类物种，但来自不同的分类学群体，将使用类似的摄食模式。我们比较了大嘴食鱼性食鱼Micropterus salmoides(Lacepede)(Centrarchidae)和Cichla ocellaris(Block And Schneider)(Cichlidae)与Lepomis spp.的摄食行为。(Centrarchidae)和Cichlosoma serum(Heckel)(Cichlidae)，都是底栖无脊椎动物上的小口捕食者，其运动形态设计为机动性。与具有相同系统发育历史的物种相比，具有相同生态形态模式的物种在口腔和顶腔中的压力分布更相似。对于小口食肉动物，最小颊压显著高于相应的穹隆压，且发生得更早。对于两种大嘴食肉动物来说，最小的颊压力和盖压在大小和时间上是相似的。我们开发了公羊吸力指数(RSI)来识别公羊进食(即捕食者运动)和吸食(即猎物运动)对缩短攻击过程中捕食者-猎物距离的相对贡献。与大嘴巴捕食者的攻击相比，小嘴巴捕食者的RSI值更接近公羊吸力连续体的吸力端。RSI为评估走向力学中种内、种间和解释变化的水动力后果提供了一个基准。
We examined the hypothesis that fish species with similar ecomorphological patterns, but from different taxonomic groups, would use similar feeding modes. We contrasted the feeding behavior of Micropterus salmoides (Lacepede) (Centrarchidae) and Cichla ocellaris (Block and Schneider) (Cichlidae), both large-mouthed piscivores with a locomotor morphology designed for fast acceleration, with Lepomis spp. (Centrarchidae) and Cichlosoma severum (Heckel) (Cichlidae), both small-mouthed predators on benthic invertebrates with a locomotor morphology designed for maneuverability. Pressure profiles in the buccal and opercular cavities were more similar for species that shared ecomorphological patterns than for species that shared phylogenetic histories. For small- mouthed predators, minimum buccal pressures were significantly greater and occurred earlier than the corresponding opercular pressures. For both large-mouthed predators, minimum buccal and opercular pressures were similar in magnitude and in timing. We developed the ram-suction index (RSI) to identify the relative contributions of ram feeding (i.e. predator movement) and of suction feeding (i.e. prey movement) to shortening the predator-prey distance during the strike. The RSI values for small- mouthed predators fell closer to the suction end of the ram-suction continuum than did strikes by the large-mouthed predators. The RSI provides a bench mark for evaluating the hydrodynamic consequences of intraspecific, interspecific and interprey variation in strike mechanics.