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1 February 2011 Population Dynamics and Secondary Production of Uca rapax (Brachyura: Ocypodidae) in a Tropical Coastal Lagoon, Southeast Brazil
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Abstract

The population dynamics and secondary production of the fiddler crab Uca rapax Smith, 1870 in the Itaipu Lagoon (Southeast Brazil) were studied. Samples were taken monthly over a period of 12 months, in order to test latitudinal gradient predictions about secondary production and P/B ratio. Males and females showed the same growth rates (K = 2.083) and reached the same asymptotic size (15.57 mm). However, females showed higher total (Z = 3.20) and annual mortality (A = 0.96 ind·year−1) than males (Z = 1.89; A = 0.85 ind·year−1). Recruitment occurred in all months, except in June, 2007. Secondary production was estimated in 113.4 g AFDW·m−2·year−1 and the production to biomass ratio (P/B) was 15.09. The production and P/B ratio estimated in the present study did not agree with the latitudinal gradient literature predictions.

Tarso Costa and Abilio Soares-Gomes "Population Dynamics and Secondary Production of Uca rapax (Brachyura: Ocypodidae) in a Tropical Coastal Lagoon, Southeast Brazil," Journal of Crustacean Biology 31(1), 66-74, (1 February 2011). https://doi.org/10.1651/09-3243.1
Received: 23 October 2009; Accepted: 1 June 2010; Published: 1 February 2011
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