Population structure aspects of Donax stiatus (Linnaeus, 1758) (Mollusca: donacidae) in Futuro Beach, Fortaleza, Ceara, State Brazil

Authors

  • Cristina de Almeida Rocha Barreira Professora Adjunta do Instituto de Ciências do Mar, Universidade Federal do Ceará, Av. da Abolição, 3207, Fortaleza - CE, 60165-081
  • Wesley Felix Batista Deparatamento de Engenharia de Pesca - UFC, Campus do Pici, Fortaleza - CE
  • Dayse de Oliveira Monteiro Mestraxo em Ciências Marinha Tropicaios do Instituto de Ciências do Mar, Universidade Federal do Ceará, Av. da Abolição, 3207, Fortaleza - CE, 60165-081
  • Wilson Franklin Junior Laboratório de Zoobentos do Instituto de Ciências do Mar, Universidade Federal do Ceará, Av. da Abolição, 3207, Fortaleza - CE, 60165-081

DOI:

https://doi.org/10.32360/acmar.v35i1-2.30899

Keywords:

bivalve population biology, growth, Donax Striatus, Brazil

Abstract

Population structure aspets of bivalve Donax striatus in Futuro Beach were analyzed within a quali-quantitative survey of  the its intertidal benthic macrofauna. Samples were taken monthly from March, 1995 through February, 1996, with a handle PVC cylindrical corer (Ø=20cm e h=30 cm). A growth analysis of studied population was conducted by means of length-based methods (ELEFAN I Program). Three class intervals was tasted, i.e., 2.0, 4.0 and 6.0 mm and a stabilization of the optimal values of populations parameters was obnserved at 6.0 mm class intervals (Rn=0.910). The von Beetalanffy parameters for the studied population were the following: L∞=25.10, K = 1.16.yr.-1 and t0=-0,028.yr.-1. The mean life span was estimated as around 12 months. The predominance of 3-month old (<6.0 mm) juveniles is probably related to human recreation and touristic activities, that change the population patterns of intertidal organisms.

Published

2017-12-14

Issue

Section

Artigos originais