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首页> 外文期刊>Brazilian Archives of Biology and Technology >Relative Growth and Sexual Maturity of the Stone Crab Menippe nodifrons Stimpson, 1859 (Brachyura, Xanthoidea) in Southeastern Brazil
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Relative Growth and Sexual Maturity of the Stone Crab Menippe nodifrons Stimpson, 1859 (Brachyura, Xanthoidea) in Southeastern Brazil

机译:巴西东南部石蟹Menippe nodifrons Stimpson,1859年(Brachyura,Xanthoidea)的相对生长和性成熟

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摘要

The relative growth and size at onset of morphological sexual maturity of the stone crab Menippe nodifrons wereinvestigated. A total of 399 crabs was captured on Praia Grande and Tenorio beaches at Ubatuba. Carapace width(CW) and length, cheliped propodus length and height, abdomen width in females, and gonopod length in maleswere recorded. In females, the abdominal width showed negative allometry for juveniles and positive allometry foradults; the puberty molt occurred at 31.6 mm CW. In males, the size at onset of morphological sexual maturity wasestimated as 29.7 mm CW; the gonopod growth showed positive allometry for juveniles, and an isometricrelationship for adults. The gonopod length and the abdominal width were the most appropriate morphometricvariables to estimate size at onset of sexual maturity in this stone crab.
机译:研究了石蟹Menippe nodifrons形态性成熟开始时的相对生长和大小。在乌巴图巴的大普拉亚海滩和特诺里奥海滩上共捕获了399只螃蟹。记录甲壳的宽度(CW)和长度,螯状的食足的长度和高度,雌性的腹部宽度以及雄性的角足动物长度。在女性中,少年的腹部宽度为负变态,成年人为正变态。青春期蜕皮发生在31.6 mm CW处。在男性中,形态性成熟开始时的大小估计为29.7 mm CW。角足类动物的生长对青少年呈正向异性,而成年人则呈等距关系。角足类的长度和腹部的宽度是最合适的形态学变量,以估计该石蟹性成熟时的大小。

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