Allometry and sexual dimorphism of the Neotropical freshwater anomuran Aegla marginata Bond-Buckup & Buckup, 1994 (Crustacea, Anomura, Aeglidae)

Autor(es)

da Silva, Alexandre Ribeiro ; Paciencia, Gabriel de Paula ; Bispo, Pitagoras Conceicao ; Castilho, Antonio Leao

• Tipo de documento: Artigo Científico
• Fonte: Nauplius; v. 25, p. 7-pg., 2017-01-01.

Resumo

This study analyzes ontogenetic allometry in Aegla marginata Bond-Buckup & Buckup, 1994, a freshwater crustacean, in order to evaluate the growth pattern and the presence of sexual dimorphism, using a multivariate approach. The specimens were sampled from streams in Intervales State Park, Sao Paulo State, Brazil. For each specimen, we measured the following structures: carapace length and width, chelae height and length, and abdomen length. Allometry was evaluated using Jolicoeur's multivariate allometric coefficient. Our results showed that for females, ABL (abdomen length) and LCH (left chelae heigh) presented positive allometry; LCL (left chelae length) and RCH (right chelae heigh) isometry; and CL (carapace length), CW (carapace width), and RCL (right chelae length) negative allometry. For males, RCH, LCH, and LCL presented positive allometry; RCL (right chelae length) isometry; and CL, CW, and ABL negative allometry. In addition, sexual dimorphism was amplified with body size. (AU)

• Processo FAPESP: 04/09711-8 - Ecologia e taxonomia de insetos aquáticos de riachos
• Beneficiário: Pitágoras da Conceição Bispo
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 02/07216-4 - Plecoptera do Parque Estadual Intervales, Sul do Estado de São Paulo: composição, morfometria e fenologia de adultos
• Beneficiário: Pitágoras da Conceição Bispo
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado