Affiliation:
1. Departamento de Ciências Biológicas e Ambientais—Grupo de Pesquisa em Biologia de Crustáceos (CRUSTA) Instituto de Biociências, Campus do Litoral Paulista (IB/CLP), Universidade Estadual Paulista (UNESP) São Vicente São Paulo Brasil
2. Programa de Pós‐Graduação em Ecologia, Evolução e Biodiversidade—UNESP Instituto de Biociências Rio Claro São Paulo Brasil
3. Centro de Ciências Naturais e Humanas Universidade Federal do ABC (UFABC) São Bernardo do Campo São Paulo Brasil
4. Centre for Ecology and Conservation University of Exeter Exeter UK
5. Departamento de Ecologia e Zoologia Universidade Federal de Santa Catarina (UFSC) Florianópolis Santa Catarina Brasil
Abstract
AbstractThe life history of insular gecarcinid crabs is divided into a marine larval and an adult phase, adapted to the terrestrial environment. As adults, individuals migrate seasonally to locations near the sea, engaging in reproductive behaviors. Therefore, identifying breeding and recruitment areas is crucial for the conservation of insular gecarcinids, especially for those endangered, such as Johngarthia lagostoma (H. Milne Edwards, 1837). We used sex ratio and sexual dimorphism analyses (body and cheliped size) as well as records of juveniles and adults to describe the population structure of J. lagostoma in the Trindade Island, Brazil. During the reproductive period, several population parameters were compared among sites with different altitudes, comprising two beaches (Andradas and Tartarugas) and two hills (Príncipe, 136 m; and Desejado, 612 m). Overall, males predominated in the population and invested more in body and cheliped growth than females. However, at Andradas Beach, it was observed a similar frequency of adult males and females as well as a small difference in the body size between the sexes. In comparison, the smallest crabs were found at Príncipe Hill. The analyzed population presented a predominance of adults, especially at Andradas Beach (93.1%). Compared to the other sites sampled, Príncipe Hill showed the highest abundance of juveniles (males: 22.2%; females: 40.8%). Thus, Andradas Beach was considered a reproductive site, while Príncipe Hill had the highest density of juveniles, which makes them priority areas for the conservation of J. lagostoma in Trindade Island.
Funder
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Fundação de Amparo à Pesquisa do Estado de São Paulo
Subject
Ecology,Aquatic Science,Ecology, Evolution, Behavior and Systematics
Cited by
1 articles.
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