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Length at maturity and batch fecundity of the hake south pacific was estimated for the time period extending from April to June of 1992. The samples were collected on board industrial trawlers operating in the Chilean fishery with base port in Talcahuano, in an area, which extends from 34°20' S to 38° S. For the length at first maturity estimations two criteria were considered: 1) to regard as ripe those females presenting oocytes in previtellogenic, vitellogenic, ripe and hidrated condition and /or post-ovulatory follicles, and 2) not taking into account the maturity stages preceding the previtellogenic stage. Using criteria 1, length at first maturity was estimated as 38.9 cm of total length (TL) (r2 = 0.58), while with criteria 2 length at first maturity was 46.3 cm of TL. Batch fecundity (BF) (>700 µm oocytes) was related with both, TL and total weight (TW) through a linear function with the following parameters: BF = - 391,144 + 9,732 * TL (predictive) BF = - 5,372 + 132 * TW (functional).

investigaciones marinas

Talla de primera madurez sexual y fecundidad parcial de la merluza común (Merluccius gayi, Guichenot 1848) del área de la pesquería industrial de la zona de Talcahuano, Chile