Oct 3, 2012

Spatial distribution of Ocypode quadrata (Decapoda: Ocypodidae) in eight beaches of North-Eastern Cuba

Revista de biología tropical
Frank A OcañaElier A Córdova

Abstract

Studies on the ecology of Ocypode quadrata have been mostly carried out in the Northern and Southern part of its distribution range. In despite that this species is common in Cuban beaches, there are no quantitative studies regarding its abundance and spatial distribution. The aim of this study was to report some aspects about the spatial variation of O. quadrata density in sandy beaches, with different levels of human influence, in the North coast of Eastern Cuba. For this, on May 2010, eight beaches with different levels of human influence were surveyed. On each beach, the number of crabs burrows were counted in 45 quadrats of 4m2 located in three different strata (P1, P2 and P3). According to burrow opening diameter, crabs were separated into young and adults forms. To determine the existence of statistical differences in the density of crab burrows among beaches and strata, a two-way ANOVA was developed with a Scheffé-procedure post hoc test. A total of 355 burrows were counted in 360 sample units. The composition by size classes was 237 burrows for young and 118 for adults. From the total of burrows, 74% were located in P1, 20% in P2 and 6% in P3. The higher concentration of burrows was found at Jiguaní beach (0.52 +/- 0.0...Continue Reading

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Mentioned in this Paper

Neuro-Oncological Ventral Antigen 2
Crabs
Cancer Genus
Seasonal Variation
Decapoda (Crustacea)
Underpopulation
Uca
Impacts, Environmental
Ocypode quadrata
Ocypodidae

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