Secondary production of the fiddler crab Uca rapax from mangrove areas under anthropogenic eutrophication in the Western Atlantic, Brazil
| Autor: | Abilio Soares-Gomes, Tarso de M. M. Costa |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Male
Brachyura Population Aquatic Science Environment Oceanography Population density Fiddler crab Animals Biomass Sex Ratio education Population Density geography Biomass (ecology) education.field_of_study geography.geographical_feature_category biology Ecology Estuary Eutrophication biology.organism_classification Pollution Fishery Productivity (ecology) Wetlands Female Mangrove Brazil |
| Zdroj: | Marine pollution bulletin. 101(2) |
| ISSN: | 1879-3363 |
| Popis: | Fiddler crabs Uca rapax were analyzed in three mangrove areas located in both a lagoon and estuarine system in order to study the influence of eutrophication on their population dynamics and production. Populations at the three sites showed a biased sex ratio. Densities were similar at the three sites, but biomass was higher at the lagoon system. Despite biomass being higher at the most eutrophic site, this site exhibited the lowest production. Regarding age structure, the population inhabiting the less eutrophic site mainly comprised younger crabs. The lower production and smaller P/B ratio found in the more eutrophic site were most likely consequences of a high mortality rate and an aged population. Our study evidences the high plasticity of the fiddler crab U. rapax, and confirms secondary production and P/B ratio estimates as useful tools to assess the effects of environmental change. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect