Advanced search
Start date
Betweenand
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Population biology and distribution of the portunid crab Callinectes ornatus (Decapoda: Brachyura) in an estuary-bay complex of southern Brazil

Full text
Author(s):
Watanabe, Timoteo T. [1] ; Sant'Anna, Bruno S. [1] ; Hattori, Gustavo Y. [1] ; Zara, Fernando J. [2, 3]
Total Authors: 4
Affiliation:
[1] Univ Fed Amazonas, Inst Ciencias Exatas & Tecnol, Programa Posgrad Ciencia & Tecnol Recursos Amazon, BR-69103128 Itacoatiara, AM - Brazil
[2] Univ Estadual Paulista, CAUNESP, Invertebrate Morphol Lab, BR-14884900 Jaboticabal, SP - Brazil
[3] IEAMar, Dept Biol Aplicada, BR-14884900 Jaboticabal, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Zoologia; v. 31, n. 4, p. 329-336, AUG 2014.
Web of Science Citations: 0
Abstract

Trawl fisheries are associated with catches of swimming crabs, which are an important economic resource for commercial as well for small-scale fisheries. This study evaluated the population biology and distribution of the swimming crab Callinectes ornatus (Ordway, 1863) in the Estuary-Bay of Sao Vicente, state of Sao Paulo, Brazil. Crabs were collected from a shrimp fishing boat equipped with a semi-balloon otter-trawl net, on eight transects (four in the estuary and four in the bay) from March 2007 through February 2008. Specimens caught were identified, sexed and measured. Samples of bottom water were collected and the temperature and salinity measured. A total of 618 crabs were captured (332 males, 267 females and 19 ovigerous females), with a sex ratio close to 1:1. A large number of juveniles were captured (77.67%). Crab spatial distributions were positively correlated with salinity (Rs = 0.73, p = 0.0395) and temperature (Rs = 0.71, p = 0.0092). Two peaks of recruitment occurred, in summer and autumn, and ovigerous females were mostly captured during summer, showing a seasonal reproductive pattern. The results showed that C. ornatus uses the bay as a nursery area for juvenile development. Callinectes ornatus is not yet a legally protected species, and the minimum allowed size of crabs caught in the area, although already restricted, should be carefully evaluated since the removal of large numbers of juveniles could negatively impact the local population. (AU)

FAPESP's process: 10/50188-8 - Decapod crustaceans: multi-disciplinary characterization of the sea biodiversity of the State of São Paulo (taxonomy, spermiotaxonomy, molecular biology and population dynamics)
Grantee:Fernando Luis Medina Mantelatto
Support type: BIOTA-FAPESP Program - Thematic Grants