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Hernández Rivas, M.E., S.P.A., Jiménez Rosenberg, A.T., Hinojosa Medina, R.J., Saldierna Martínez & G., Aceves Medina (2011). Larval abundance of Sardinops sagax in the Sebatian Vizcaíno area during 1997-2003 IMECOCAL Cruises. 12th Annual Meeting Trinational Sardine Forum. La Jolla, California, USA, Estados Unidos de América, diciembre 8 - 9, 2011, 9.

Larval abundance of Sardinops sagax in the Sebatian Vizcaíno area during 1997-2003 IMECOCAL Cruises

Martín Enrique Hernández Rivas, Sylvia Patricia Adelheid Jiménez Rosenberg, Alejandro Trinidad Hinojosa Medina, Ricardo Javier Saldierna Martínez y Gerardo Aceves Medina

Sebastian Vizcaino bay has been traditionally considered the center of spawning for the Pacific sardine (Sardinops sagax), several papers reported this area, as the major spawning ground during the low abundance periods and this shift to central California during high abundance periods. In order to establish if the three stocks (c.f. Félix-Uraga) spawn in Punta Eugenia vicinity, we analyzed the larval abundance of pacific sardine in an area of 35,678 km2, Vizcaino priority region for conservation. We found the presence of two stocks, cold and temperate, the cold stock spawn occur in April primarily, and in some years in January, the temperate stock spawn in summer, fall and mainly in winter. The tendency of the cold stock is to diminish while the temperate stock seems to be increasing from 2002 to 2003 period, following the tendency of SST. Finally we calculated the larval index of sardine larvae by cruise, in same area.

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