Data/hora: 01/06/2024 02:43:35

Provedor de dados: | Ocean Docs: e-repository of  publications
País: | Belgium

Título:

Análisis de la utilización de la captura por unidad de esfuerzo de pescadilla de red (Cynoscion guatucupa) como índice de abundancia anual. Período 1992-2004

Analysis of the use of catch per unit of effort as an annual abundance index for stripped weakfish (Cynoscion guatucupa). 1992-2004 period.

Autores: | Perrotta, R.G.; Ruarte, C.O.
Data: | 2010-04-28
Ano: | 2009
Palavras-chave: | Catch/effort; Mathematical models; Coastal fisheries; Marine environment; Marine environment; Mathematical models; Coastal fisheries; Http://aims.fao.org/aos/agrovoc/c_4610; Http://aims.fao.org/aos/agrovoc/c_24199; Http://aims.fao.org/aos/agrovoc/c_1696.
Resumo: | The stripped weakfish (Cynoscion guatucupa)  caught in Brazil, Uruguay and Argentina (SW Atlantic) has a wide latitudinal distribution (22° S-43° S). In Argentina there are two main fishing areas, the Argentine-Uruguayan Common Fishing Zone and 'El Rincón', southern zone of the Buenos Aires littoral. The importance of the species makes it necessary to define an annual abundance index that would allow to diagnose the state of the stock. The model adjusted to calculate the index is the General Linear Model. The factors used were Year, Quarter, Length, Stratum (4 categories) and sub-areas (5 categories), all statistically significant. The problem generated by the presence in the model of first order interactions that include the Year factor is discussed. The importance of said interactions is assessed pursuant to the percentage of variance explained considering the model with and without such interactions. It is concluded that the catch per unit of effort series reflects space-temporal changes in the fleet activity not proportional to the biomass.
Tipo: | Journal Contribution
Idioma: | Espanhol

Identificador:

INIDEP informe técnico, 70. p. 1-13

0327-9642

http://hdl.handle.net/1834/3461

Editor: | Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero