MATRIX MODELING FOR ANALYZING THE POPULATION DYNAMICS OF THE BRAZILIAN MANGROVE CRAB UCIDES CORDATUS L. (DECAPODA: UCIDIDAE)

Modelos matriciais para a análise da dinâmica populacional de Ucides cordatus L. (Decapoda: Ucididae)

Authors

  • Marcos de Miranda Leão Leite Universidade Federal do Ceará - UFC
  • Dalva Maria Silva-Matos Universidade Federal de São Carlos - UFSCar
  • Raquel Negrão Baldoni Universidade Federal de São Carlos - UFSCar
  • José Roberto Feitosa-Silva Universidade Federal do Ceará - UFC
  • Cynthia Yuri Ogawa Universidade Federal do Ceará - UFC
  • Luís Ernesto Arruda Bezerra Universidade Federal do Ceará - UFC

DOI:

https://doi.org/10.32360/acmar.v57i1.93441

Abstract

Ucides cordatus is an important but dwindling fishing resource in mangrove environments along the Brazilian coast. In this study, we used a matrix model to clarify the population dynamics of this resource. Specimens were collected monthly using traps, between July 2011 and June 2012, in a mangrove of the Jaguaribe River (Ceará, Northeast Brazil). The population dynamics were investigated with the size/stage-structured matrix model proposed by Lefkovitch. Carapace width was measured with a stainless steel caliper (accuracy: 0.05 mm). The final sample consisted of 223 female specimens. Average carapace width was 48.4 mm. The matrix modeling indicates that the sampled population is expanding (λ=1.30) and the demographic parameter “survival and growth rate” is crucial to maintain the population.

Keywords: Population dynamics; fisheries management; demography.

Published

2024-05-23