DENSITY AND DISTRIBUTION OF Chiridota rotifera (POURTALÈS, 1851) (ECHINODERMATA: HOLOTHUROIDEA: CHIRIDOTIDAE) ON PACHECO BEACH, CEARÁ STATE

Authors

  • Ana Carolina Martins Empresa Brasileira de Pesquisa Agropecuária - EMBRAPA, Amazônia Oriental
  • Inês Xavier Martins Curso de Engenharia de Pesca, Universidade Federal Rural do Semi-Árido
  • Helena Matthews Cascon Departamento de Biologia, Universidade Federal do Ceará

DOI:

https://doi.org/10.32360/acmar.v43i2.5991

Keywords:

Ceará shore, distribution, holothurian, intertidal zone

Abstract

The population density and distribution of Chiridota rotifera on Pacheco Beach, Caucaia, Ceará was investigated in the present study. Sampling was performed from October to December, 2002, and April to July, 2003, using three transects, each 120 m long, from the intertidal to the subtidal zone. The number of individuals was counted with 0,25 m 2 quadrats, and the distribution pattern of specimens was analyzed with the Morisita index. The mean density was 0,8 ind.m - ². The difference between rainy and dry seasons densities was non significant (p>0.05). A significant differenceon the placement of the specimens in relation to the shoreline during the two seasons was observed (p<0.05), with the specimens being found closer to the shoreline during the rainy season. The studied population showed an aggregate distribution

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Published

2010-11-01

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Section

Artigos originais