Título

VARIABILITY OF SARDINE CATCH AS RELATED TO ENRICHMENT, CONCENTRATION, AND RETENTION PROCESSES IN THE CENTRAL GULF OF CALIFORNIA

Autor

Daniel Bernardo Lluch Cota

SALVADOR EMILIO LLUCH COTA

DANIEL LLUCH BELDA

Manuel Otilio Nevárez Martínez

ALEJANDRO FRANCISCO PARES SIERRA

SERGIO HERNANDEZ VAZQUEZ

Nivel de Acceso

Acceso Abierto

Licencia

http://creativecommons.org/licenses/by-nc-nd/4.0

Referencia de publicación

URL/URL: https://www.calcofi.org/publications/calcofireports/v40/CalCOFI_Rpt_Vol_40_1999.pdf

ISSN/ISSN: 0575-3317

Materias

SARDINE, GULF OF CALIFORNIA - (AUTOR) CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA - (CTI) CIENCIAS AGRARIAS - (CTI) PECES Y FAUNA SILVESTRE - (CTI) TÉCNICAS PESQUERAS - (CTI) TÉCNICAS PESQUERAS - (CTI)

Resumen o descripción

"The sardine (Sardinops sugax) fishery of the Gulf of California is among Mexico’s most important fisheries, accounting for the largest catch and providing many productive jobs. During the early 1990s, this fishery collapsed to less than 3% of the production maximum. Surprisingly, after two years of very low catch the fishery recovered quickly. We propose that these large fluctuations may be explained mainly by physical processes (enrichment, retention, and concentration) governing the sardine spawning habitat. The spawning area may be influenced by processes such as tidal mixing, Winter northwesterly winds, coastal upwelling, prevailing Surface currents, and Ekman transport, but most of its variability is believed to be wind-forced. Therefore we attempted to relate spawning extension to wind variations. By fitting an equation that expresses spawning as a probability function of a wind-derived index, we have built a spawning-probability time series based on egg and larval survey data and then tested against an independent series of landings and biomass indices (number of recruits and adults). Results show coherent relations between the spawning-probability series and the biological and fisheries data, despite large fluctuations (collapse and recovery). Our results are encouraging and may provide a solid theoretical basis for future environment- monitoring systems for the sardine fishery in the gulf."

Editor

California Cooperative Oceanic Fisheries Investigations

Fecha de publicación

1999

Tipo de publicación

Artículo

Versión de la publicación

Versión publicada

Recurso de información

http://cibnor.repositorioinstitucional.mx/jspui/handle/1001/2127

Formato

application/pdf

Fuente

CalCOFI Reports

Idioma

Inglés

Repositorio Orígen

Repositorio Institucional CIBNOR

Descargas

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