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

LIFESPAN AND REPRODUCTIVE DYNAMICS OF THE COMMERCIALLY IMPORTANT SEA BOB SHRIMP XIPHOPENAEUS KROYERI (PENAEOIDEA): SYNTHESIS OF A 5-YEAR STUDY

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Author(s):
Castilho, Antonio L. [1, 2] ; Bauer, Raymond T. ; Freire, Fulvio A. M. [3] ; Fransozo, Vivian [4] ; Costa, Rogerio C. [5] ; Grabowski, Raphael C. [1] ; Fransozo, Adilson [1]
Total Authors: 7
Affiliation:
[1] Univ Estadual Paulista, Dept Zool, Nucleo Estudos Biol Ecol Cultivo Crustaceos, IB, UNESP, BR-18618000 Botucatu, SP - Brazil
[2] Univ Louisiana Lafayette, Dept Biol, Lafayette, LA 70504 - USA
[3] Univ Fed Rio Grande do Norte, Dept Bot Ecol & Zool, BR-59072970 Natal, RN - Brazil
[4] Univ Estadual Sudoest Bahia, Dept Ciencias Nat Zool, BR-45031900 Itapetinga, BA - Brazil
[5] Univ Estadual Paulista, LABCAM Lab Biol CamaroesMarinhos & Agua Doce, Dept Ciencias Biol, FC, UNESP, BR-17033360 Bauru, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Journal of Crustacean Biology; v. 35, n. 1, p. 30-40, JAN 2015.
Web of Science Citations: 20
Abstract

Population parameters of the shrimp Xiphopenaeus kroyeri (Heller, 1862) (sex ratio, length-frequency distributions (carapace length, CL), growth, lifespan, size of sexual maturity, spawning and recruitment) were analyzed in a long-term study from January 1998 through June 2003. The data on these parameters were collected and analyzed to test the hypothesis that the main period of juvenile recruitment in the bay coincides with the period of fishery closures currently designated by the Brazilian Institute of Environment and Renewable Natural Resources. Monthly collections were conducted along the southeastern Brazilian coast, using a shrimp fishing boat with ``double-rig{''} nets sampling at stations up to 40 m depth. Sex ratios were female-biased only in zones with high reproductive activity such as in stations deeper than 15 m (chi(2) test, p <0.05). The mean size of males and females was 15.3 +/- 3.1 mm CL and 16.2 +/- 4.7 mm CL, respectively, with size at sexual maturity estimates (CL50) of 14.8 mm for males and 15.5 mm for females. Mean growth curves provided estimates of CL infinity = 29.31 mm, k = 0.009/day, t(0) = -0.25 and CL infinity = 35.33 mm, k = 0.006/day, t(0) = -0.23 for males and females, respectively, and average lifespans of 1.35 for males and 2.12 years for females. Recruitment and abundances of reproductive females were highly correlated with the environmental factors such as higher water temperature and finer-grained bottom sediment (canonical correlation, r = 0.63, p < 0.001). The reproductive peaks in February-April 1998, March-May 1999 and February-May 2002 were followed by recruitment peaks in May-July 1998, July-September 1999 and April-June 2002, respectively. Thus, the proposed period of fisheries closure (March to May) does not coincide with the main recruitment periods observed for X. kroyeri. (AU)

FAPESP's process: 09/54672-4 - Reproductive biology and dynamic population of the Penaeoidean shrimps (Crustacea, Decapoda) from southeastern Brazilian coast: latitudinal effect and suggestion for fishery control
Grantee:Rogério Caetano da Costa
Support type: Regular Research Grants
FAPESP's process: 98/07090-3 - Benthic marine biodiversity in the state of São Paulo
Grantee:Antonia Cecília Zacagnini Amaral
Support type: BIOTA-FAPESP Program - Thematic Grants
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