Advances in population monitoring of the mangrove 'uca'-crab (Ucides cordatus): reduction of body size variance for better evaluation of population structure and extractive potential

Autor(es)

Pinheiro, Marcelo A. A. ; Sousa, Fernanda V. B. ; Perroca, Julia F. ; Silva, Mauro M. T. ; Souza, Raimundo L. M. ; Mota, Thais A. ; Rocha, Sergio S.

• Tipo de documento: Artigo Científico
• Fonte: MARINE BIOLOGY RESEARCH; v. 19, n. 2-3, p. 13-pg., 2023-03-16.

Resumo

Monitoring focusing on target species is an important tool to better understand biodiversity. The density, size, extractive potential and population structure of Ucides cordatus reflects the conservation of the mangrove ecosystem. The Federal Brazilian Institution of Biodiversity Conservation (ICMBio) defined a protocol to standardize and estimate these parameters using an indirect method that does not depend on the capture of individuals of a species. In this protocol are used models to adjust diameter of crabs' gallery (DG) measures into largest carapace width (LC). Because this relationship (LC vs. DG) can differ according to geographic positions, the present study assessed it in three Brazilian mangrove areas (north, north-east, and south-east regions). Linear models of this relationship were compared between sexes, and also applied as a single model considering these Brazilian localities as a fixed factor and in three independent models for each locality separately. Equations did not differ significantly between sex and could be represented as one to each locality. However, a simpler linear model not including mangroves as fixed factors can be used to represent the entire latitudinal gradient, promoting a homogeneity of the estimation error, due to cover the entire body size (LC) variation of the Ucides cordatus crab. (AU)

• Processo FAPESP: 09/14725-1 - Projeto Uçá III - Impacto genotóxico em populações do caranguejo-uçá, Ucides cordatus (Linnaeus, 1763) (Crustacea, Brachyura, Ucididae): avaliação e correlação com a concentração de metais pesados em cinco manguezais do estado de São Paulo
• Beneficiário: Marcelo Antonio Amaro Pinheiro
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 02/05614-2 - Projeto Uçá II: biologia e manejo do caranguejo-uçá, Ucides cordatus (Linnaeus, 1763) (Crustacea, Decapoda, Brachyura)
• Beneficiário: Marcelo Antonio Amaro Pinheiro
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 14/50438-5 - Monitoramento da densidade e estrutura populacional do caranguejo-uçá, Ucides cordatus (Linnaeus, 1763) (Brachyura: Ucididae), como indicador de mudanças climáticas
• Beneficiário: Marcelo Antonio Amaro Pinheiro
• Modalidade de apoio: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - PITE