EFFECTS OF MANIPULATED DIET ON SIZE AND PERFORMANCE OF BRACHYURAN CRAB CLAWS
EFFECTS OF MANIPULATED DIET ON SIZE AND PERFORMANCE OF BRACHYURAN CRAB CLAWS
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DOI：
10.1126/science.264.5159.710
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发表时间：
1994-04-29
期刊：
影响因子：
56.9
通讯作者：
PALMER, AR
中科院分区：
文献类型：
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作者：
SMITH, LD;PALMER, AR
与在营养相当的无壳猎物上饲养的螃蟹相比，在完全去壳的猎物上进行实验饲养的螃蟹具有更大、更强的爪子。当一只爪子固定不动时，爪子也会变得不对称。这些使用引起的变化与脊椎动物和许多无脊椎动物的骨骼重塑不同，因为刚性外骨骼的变化只能在蜕皮后发生，并且爪肌质量必须在蜕皮前大幅减少。这种对环境刺激的短期适应性反应，如果可遗传，可能会导致爪大小的长期进化变化，如果与偏向一侧的行为偏差（利手性）相结合，也可能促进爪二态性的进化。
Crabs grown experimentally on fully shelled prey developed larger and Stronger claws than those raised on nutritionally equivalent unshelled prey. When one claw was immobilized, claws also became asymmetrical. These use-induced changes differ from skeletal remodelling in vertebrates and many invertebrates because changes in the rigid exoskeleton can occur only after molting, and claw muscle mass must be reduced substantially before the molt. Such short-term adaptive responses to environmental stimuli, if heritable, could yield long-term evolutionary changes in claw size and, if combined with behavioral biases toward one side (handedness), could also promote the evolution of claw dimorphism.