Spatial variability in the population of Isognomon bicolor (C.B. Adams, 1845) (mollusca, bivalvia) on rocky shores in Espírito Santo, Brazil

Authors

  • Gabriela Carvalho Zamprogno Universidade Federal do Espírito Santo; Programa de Pós Graduação em Ciências Biológicas
  • Luiz Loureiro Fernandes Universidade Federal do Espírito Santo; Departamento de Oceanografia e Ecologia
  • Flavio da Costa Fernandes Instituto de Estudos do Mar Almirante Paulo Moreira

DOI:

https://doi.org/10.1590/S1679-87592010000100003

Keywords:

Rocky shores, Intertidal zone, Introduced species, Substrate heterogeneity, Isognomon bicolor, Espírito Santo

Abstract

This study aimed to compare the density of Isognomon bicolor on four rocky shores of the State of Espírito Santo, Brazil. Further, size and weight comparisons were undertaken for the flat and creviced surfaces. Quarterly samplings were taken in 2006 and 2007, by removing organisms from 10 x 10 cm quadrants in the mid-intertidal zone, with five samples from flat surfaces and five from crevices. Although densities of I. bicolor were considered low as compared with those of other studies, this species is well established in the State. The most well-established population of I. bicolor was found in the rock crevices. The most important factor for the establishment of I. bicolor on rocky shores is substrate heterogeneity.

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Published

2010-03-01

Issue

Vol. 58 No. 1 (2010)

Section

naodefinida

How to Cite

Spatial variability in the population of Isognomon bicolor (C.B. Adams, 1845) (mollusca, bivalvia) on rocky shores in Espírito Santo, Brazil . (2010). Brazilian Journal of Oceanography, 58(1), 23-29. https://doi.org/10.1590/S1679-87592010000100003