Food availability in beach and marsh habitats and the size of the fiddler crab claw, a sexually selected weapon and signal
Food availability in beach and marsh habitats and the size of the fiddler crab claw, a sexually selected weapon and signal
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海滩和沼泽栖息地的食物供应情况以及招潮蟹爪的大小（一种性选择武器和信号）
DOI：
10.1111/j.1600-1706.2009.18105.x
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发表时间：
2010
期刊：
影响因子：
3.4
通讯作者：
A. Pratt
中科院分区：
文献类型：
--
作者：
D. McLain;A. Pratt
沙招潮蟹Uca pugilator的男性拥有一个大大扩大的爪子，在仪式化的比赛中用作武器，以控制繁殖洞穴，并挥舞着吸引女性到繁殖洞穴。在北美大西洋沿岸沿着的14个地点收集了大约5400只螃蟹，所有这些地点都有海滩和盐沼栖息地。对每个爪进行五次测量。主成分分析用于从爪的七个相关测量和分数生成爪大小的单个测量。测量甲壳宽度以指示身体大小。爪的大小是大于海滩比沼泽栖息地，控制身体的大小。然而，身体大小没有不同的栖息地类型。爪的大小也更大，在实验室饲养的男性接受更多的食物，这表明，获得食物的差异可能会影响栖息地相关的差异爪的大小。分别反映底栖藻类和其他食物丰度的叶绿素a浓度和总有机物含量在海滩中高于沼泽栖息地。此外，喂养的机会更大，在潮湿的海滩栖息地，因为螃蟹那里，但不是在沼泽栖息地，可以在繁殖洞穴喂养。成年招潮蟹继续蜕皮，随着年龄的增长，身体和爪子的大小都在增长。大力投资在爪相对于身体是塑料。看来食物的可用性可以影响在爪子上投入的能量。
Males of the sand fiddler crab Uca pugilator possess a greatly enlarged claw that is used as a weapon in ritualized contests for control of breeding burrows and is waved to attract females to breeding burrows. Approximately 5400 crabs were collected along the Atlantic coast of North America at 14 localities, all of which had both beach and salt marsh habitats. Five measurements were made on each claw. Principal components analysis was used to generate a single measure of claw size from the seven correlated measures and scores of the claw. Carapace width was measured to index body size. Claw size was greater in beach than marsh habitats, controlling for body size. However, body size did not differ by habitat type. Claw size was also greater in laboratory-reared males receiving more food, suggesting that differential access to food could influence habitat-associated differences in claw size. Chlorophyll a concentration and total organic content, reflecting, respectively, the abundance of benthic algae and other food, were greater in beach than marsh habitats. Moreover, feeding opportunities were greater in the wetter beach habitat because crabs there, but not in marsh habitat, can feed at breeding burrows. Adult fiddler crabs continue to molt and grow in both body and claw size as they age. Energetic investment in the claw relative to the body is plastic. It appears that the availability of food can affect the amount of energy invested in the claw.
影响因子：
2.5
作者：
Matsumasa, M;Murai, M
通讯作者：
Murai, M