[EN] In this paper a review is made of present knowledge on histological changes in sardine ovaria, accompanying ripening, spawning and recovering. The authors prove histologically that every female pilchard is able to spawn many times in the same spawning season. The degenerative phenomena in recovering ovaria, between two partial spawnings are studied, and also those of the end of sexual cycle up to attainement of the resting phase. In the recovering phase there is a large sctivity in ovarian tissues: great number of little ovocites appears in the transition stage from folicular cells to sexual cells. These little ovocites of new-formation, increasing their diameter, are moved to the reserve stock of ovocites. Oogonial divisions have not been observed. However, inthe recovering phases many mitotic divisions in the folicular tissue exist. The number of reserve ovocites (ovocites of the general stock) increases with the fourth power of the sardine length

[ES] Cada día juega un papel más importante en Biología Pesquera la perfecta identificación del grado de madurez de las glándulas sexuales a fin de poder delimitar el período de freza de las especies comerciales, concordante con la completa madurez de las gonadas. [...]

32 páginas, 25 fotos, 4 figuras, 1 cuadro

Peer reviewed