MATRIX MODELS 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
  • Dalva Maria Silva-Matos Universidade Federal de São Carlos
  • Raquel Negrão Baldoni Universidade Federal de São Carlos
  • José Roberto Feitosa-Silva Universidade Federal do Ceará
  • Cynthia Yuri Ogawa Universidade Federal do Ceará - UFC
  • Luís Ernesto Arruda Bezerra Universidade Federal do Ceará

DOI:

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

Abstract

Ucides cordatus is an important yet declining fishery resource in mangrove ecosystems along the Brazilian coast. This study uses a matrix model to investigate the population dynamics of this species. Specimens were collected monthly using traps from July 2011 and June 2012 in a mangrove area of the Jaguaribe River (Ceará, Northeast Brazil). Population dynamics were analyzed using 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 included 223 female specimens, with an average carapace width of 48.4 mm. Matrix modeling results indicate that the sampled population is expanding (λ=1.30), and the demographic parameter “survival and growth rate” is crucial for maintaining the population.

Keywords: Population dynamics; fisheries management; demography.

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Published

2024-05-23