Produção Nacional
Revisado por pares
Spatial distribution of fiddler crabs (Genus <i>Uca</i>) in a tropical mangrove of northeast Brazil
2006; Spanish National Research Council; Volume: 70; Issue: 4 Linguagem: Inglês
10.3989/scimar.2006.70n4759
ISSN1886-8134
AutoresLuís Ernesto Arruda Bezerra, Carolina Braga Dias, Givanildo Ximenes Santana, Helena Matthews-Cascón,
Tópico(s)Aquaculture Nutrition and Growth
ResumoThe influence of abiotic factors on the spatial distribution of the fiddler crabs Uca leptodactyla, U. maracoani, U. rapax and U. thayeri was studied in a tropical mangrove of northeast Brazil.Eight transects were delimited in a mangrove area of the Pacoti River.On each transect, three 0.25 m 2 squares were sampled during spring low tide periods from September 2003 to August 2004.The sediment of the squares at each transect was analysed for grain size, organic matter and humidity.Morphology of the second maxilliped was studied considering the number of spoon-tipped setae to help explain the ecological distribution of the species.U. leptodactyla and U. rapax were found living in medium sand, U. thayeri was collected in fine and very fine sand, while U. maracoani was found living in very fine sand.U. leptodactyla showed a negative correlation with organic matter and humidity while U. thayeri showed a positive correlations for both factors.U. maracoani and U. rapax were not correlated with organic matter or humidity.The analysis of the second maxilliped revealed that U. leptodactyla and U. rapax show a high quantity of spoon-tipped setae while U. maracoani and U. thayeri show a greater quantity of plumose setae.
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