We studied two key traits in the life of organisms, body size and sexual maturity, and a population attribute, density, of the crab Goniopsis cruentata. Also, we evaluated the role of environmental factors on population density. We caught crabs in two mangrove sites that are under different influence of tidal fluctuation, and obtained pH and salinity of mangrove soil from each site as well as rainfall data for the period of study. Both body size and sexual maturity differed between sites, in which individuals from the small-bodied population matured at smaller sizes than their counterparts from the large-bodied population, which matured at larger sizes. In addition, density of the small-bodied population was lower than that of the large-bodied one. We did not detect any influence of the environmental factors on population density. Our finding indicate that key life history traits and population characteristics can vary on a very small spatial scale which may help to further elucidate the biology of natural populations.
Sexual maturity of the swimming crab Callinectes danae (Crustacea: Portunidae) at the Santa Cruz Channel, a tropical coastal environment.
J. Mar. Biol. Ass. U.K.92287-293.
Selective geochemistry of iron in mangrove soils in a semiarid tropical climate: effects of the burrowing activity of the crabs Ucides cordatus and Uca maracoani.
Population structure of the South American Estuarine crab, Chasmagnathus granulatus (Brachyura: Varunidae) near the southern limit of its geographical distribution: comparison with northern populations.
Empirical evidence of density-dependence in populations of large herbivores.
Adv. Ecol. Res.41313-357.
Physiological maturity and relationships of growth and reproduction in the red mangrove crab Goniopsis cruentata (Latreille) (Brachyura, Grapsidae) on the coast of São Paulo, Brazil.
Rev. Bras. Zool.22219-223.
HattoriG.Y. (2006) Densidade populacional do caranguejo-uçá Ucides cordatus (Linnaeus 1763) (Crustacea: Brachyura: Ocypodidae) na região de Iguape (SP). Ph.D. Thesis Universidade Estadual Paulista 143 pp.
The Biology of Mangroves and Seagrasses. Oxford University PressNew York.
Geochemistry of iron and manganese in soils and sediments of a mangrove system, Island of Pai Matos (Cananéia – SP, Brazil).
Relative growth and morphological sexual maturity of Uca cumulanta (Crustacea: Decapoda: Ocypodidae) from a tropical Brazilian mangrove population.
J. Mar. Biol. Ass. U.K.3569-574.
Quantitative genetics of body size and timing of maturation in two nine-spined stickleback (Pungitius pungitius) populations.
Plos One6: e28859.
Ontogeny of salinity tolerance and hyper-osmoregulation by embryos of the intertidal crabs Hemigrapsus edwardsii and Hemigrapsus crenulatus (Decapoda, Grapsidae): survival of acute hyposaline exposure.
Comp. Biochem. Physiol.140495-505.