Population dynamics of Rimapenaeus constrictus (Stimpson, 1874) (Penaeoidea) on the southeastern Brazilian coast: implications for shrimp fishing management from a 5-year study on a bycatch species
Título del documento: Population dynamics of Rimapenaeus constrictus (Stimpson, 1874) (Penaeoidea) on the southeastern Brazilian coast: implications for shrimp fishing management from a 5-year study on a bycatch species
Revista: Anais da Academia Brasileira de Ciencias
Base de datos: PERIÓDICA
Número de sistema: 000408998
ISSN: 0001-3765
Autores: 1
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Instituciones: 1Universidade Estadual Paulista "Julio de Mesquita Filho", Instituto de Biociencias de Botucatu, Botucatu, Sao Paulo. Brasil
2Universidade Estadual Paulista "Julio de Mesquita Filho", Faculdade de Ciencias, Bauru, Sao Paulo. Brasil
3Universidade Federal do Triangulo Mineiro, Instituto de Ciencias Exatas, Naturais e Educacao, Uberaba, Minas Gerais. Brasil
Año:
Periodo: Jun
Volumen: 89
Número: 2
Paginación: 1013-1026
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Experimental, aplicado
Resumen en inglés This is the first study to evaluate in broad spatiotemporal scales the growth parameters and population structure of Rimapenaeus constrictus, a barely damaged species composing the bycatch from shrimp fishing in the Western Atlantic. The abundance and size-class frequency distribution, growth, longevity and sex ratio were evaluated from monthly samples obtained in the northern littoral of São Paulo state from Jan/1998 to Jun/2003. We measured 5,812 individuals in which the sex ratio was skewed toward females; this was more evident in size classes greater than 10 mm in CL (carapace length) (binomial test, p<0.05). We selected 16 growth cohorts of females, and 8 of males, the majority consisting of younger individual cohorts excluded from the fisheries closure period. Growth estimates resulted in a CL∞ of 17.42 mm, a growth coefficient of 0.008 and a longevity of 579 days (1.60 year) for females, as well as a CL∞ of 16.3 mm, a growth coefficient of 0.01 and a longevity of 425 days (1.17 year) for males. Our results provide information of incontestable relevance to our knowledge of fishing management. We therefore strongly recommend that the fisheries closure period be changed to protect this species' recruitment period and consequently its adult individuals
Disciplinas: Biología,
Medicina veterinaria y zootecnia
Palabras clave: Crustáceos,
Pesca,
Pesquería de camarón,
Fauna de acompañamiento,
Abundancia,
Distribución por talla,
Crecimiento,
Proporción sexual,
Reclutamiento,
Evaluación poblacional,
Rimapenaeus constrictus,
Penaeoidea
Keyword: Biology,
Veterinary medicine and animal husbandry,
Crustaceans,
Fisheries,
Fishing,
Shrimp fisheries,
By catch,
Abundance,
Size distribution,
Growth,
Sex ratio,
Recruitment,
Stock assessment,
Rimapenaeus constrictus,
Penaeoidea
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