Relative growth and morphological sexual maturity of the crab Hepatus pudibundus (Herbst, 1785) (Decapoda: Aethridae) in southeast Brazil

IF 0.7 4区生物学 Q4 REPRODUCTIVE BIOLOGY Invertebrate Reproduction & Development Pub Date : 2022-11-11 DOI:10.1080/07924259.2022.2142485

Milena Silva Jaconis, C. S. Nogueira, Gabriel Vieira Martins Rezende-Gois, J. F. Perroca, R. C. Costa

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引用次数: 2

Abstract

ABSTRACT The crab Hepatus pudibundus is a bycatch of the shrimp fishing industry, and despite having no commercial value, it is impacted by fishing activities. In this way, research about relative growth and sexual maturity can help to understand the life cycle of fisheries-affected species. Thus, the present study aimed to estimate morphological sexual maturity (MSM) and analyse the relative growth of a population of H. pudibundus. For morphometric analysis and MSM estimate, the following structures were measured: the carapace (CW) and abdomen width (AW), the left and right cheliped propodus length (LPL and RPL) and height (LPH and RPH) for both sexes, and the gonopodium length (GL) for males. No heterochely was observed for both sexes, but the propodus dimensions showed sexual dimorphism. Males attain MSM at 44.71 mm CW and females at 41.87 mm CW. Males and females showed higher growth rates in GL and AW, respectively, in the juvenile stage, suggesting a greater investment in the development of secondary sexual characteristics before MSM. The present study provides information on the growth pattern of the species, which is significant to the community structure of fishing areas and serves as a parameter for evaluating protective measures that have been implemented.

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巴西东南地区爪蟹(Herbst, 1785)(十足目:斑蟹科)的相对生长和形态性成熟

摘要pudibundus河蟹是捕虾业的副渔获物，虽然没有商业价值，但受到捕捞活动的影响。这样，研究相对生长和性成熟度有助于了解受渔业影响物种的生命周期。因此，本研究旨在评估形态性成熟度（MSM），并分析阴部蟾蜍种群的相对增长。为了进行形态计量学分析和MSM估计，测量了以下结构：雄性的甲壳（CW）和腹部宽度（AW）、左右螯足蟾蜍的长度（LPL和RPL）和高度（LPH和RPH），以及性腺足的长度（GL）。两性均未观察到异源性，但出埃及记维度显示两性异形。雄性在44.71毫米CW时达到MSM，雌性在41.87毫米CW时获得MSM。在青少年阶段，男性和女性在GL和AW中分别表现出更高的生长率，这表明在MSM之前对第二性特征的发展有更大的投资。本研究提供了有关该物种生长模式的信息，这对捕鱼区的群落结构具有重要意义，并可作为评估已实施的保护措施的参数。

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来源期刊

Invertebrate Reproduction & Development 生物-动物学

CiteScore

1.90

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Invertebrate Reproduction & Development ( IRD) presents original research on the reproductive and developmental biology of the Invertebrata, both embryonic and postembryonic. IRD welcomes papers reporting significant results obtained using new techniques. Encouraged topic areas include: aquaculture, physiology, biochemistry, functional morphology, phylogeny, behavioural and regulatory mechanisms, including genetic, endocrine and molecular studies. Papers containing qualitative descriptions of reproductive cycles and gametogenesis will not be considered. IRD is published in association with the International Society of Invertebrate Reproduction and Development.