Relative growth pattern and relative condition factor in the Japanese mitten crab Eriocheir japonica (De Haan, 1835) (Brachyura: Varunidae)
Relative growth pattern and relative condition factor in the Japanese mitten crab Eriocheir japonica (De Haan, 1835) (Brachyura: Varunidae)
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日本绒螯蟹 Eriocheir japonica (De Haan, 1835) 的相对生长模式和相对条件因素（Brachyura： Varunidae）
DOI：
10.1093/jcbiol/rux069
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发表时间：
2017
影响因子：
1.1
通讯作者：
C. A. Strüssmann
中科院分区：
文献类型：
--
作者：
Zhixin Zhang;M. Yokota;C. A. Strüssmann
异速生长模式和相对条件因子是甲壳动物生活史中的重要考虑因素。本研究测定了日本绒螯蟹Eriocheir japonica（De哈安，1835）的体细胞生长模式和相关条件因子。该物种的形态学性成熟大小是根据雄性的螯和雌性的腹部来确定的。雄蟹达到形态成熟时的尺寸小于雌蟹。雌雄第二性征的相对生长率在形态成熟期显著高于未成熟期。背甲宽-重关系及相关条件因子表明，E.日本东部的板田川，由于其杂食性和丰富的食物，日本处于相对较好的状态。此外，在相对条件因子上，两性间无显著差异。E.潮间带的粳稻显著高于河流。大小和月的相对条件因子的影响反映了该物种的降河产卵的生活方式，以及个体发育的能量分配的变化。
Allometric growth patterns and the relative condition factor are important considerations in the life history of crustaceans. We determined the somatic growth patterns and relative condition factor in the Japanese mitten crab Eriocheir japonica (De Haan, 1835). The morphological sexual maturity size in this species was determined based on the chela in males and abdomen in females. Male crabs reached morphological maturity at a smaller size than females. Male and female secondary sexual characters had a significantly higher relative growth rate in morphologically mature than immature crabs. The carapace width-weight relationship and relative condition factor indicated that E. japonica is in relatively good condition in the Banda River, eastern Japan because of its omnivorous habit and the abundance of available food. Besides, no significant difference in the relative condition factor was observed between sexes. The relative condition factor in E. japonica was significantly higher in the intertidal zone than in the river. The effects of size and month on the relative condition factor reflected the catadromous lifestyle of this species as well as ontogenetic changes in energy allocation.