The lsraeli Joumal of Aquaculture - Bamidgeh 51(2), 1999, 58-64

GROWTH, MATURITY AND INDUCED SPAWNING OF
MANGROVE RED SNAPPER,
L UTJA NUS ARGENTIMACULATUS,
BROODSTOCK REARED IN CONCRETE TANKS



Arnil C. Emata, Jhozine P. Damaso and Bernadita E. Eullaran

Aquaculture Department, Southeast Asian Fisheries Development Center (SEAFDEC), P.O. Box 256, Lloilo City 5000, Philippines

(Received 8.11.98, Accepted 25.4.99)

Abstract

Mangrove red snapper, Lutjanus argentimaculatus, fry (n=30) were collected in 1993 and reared in concrete tanks. They were led trash fish every other day initially at 10% to 5%, until they reached three years. They reached 4.180.14 kg (mean body weight) after five years in captivity. Males matured in four years (mean body weight 2.55 kg, mean total length 49.6 cm) and females in five years (3.92 kg, 57.0 cm). As with other Lutjanids, L. argentimacutatus exhibited separate sexes and no sexual dimorphism. Mangrove red snapper broodstock were sexually mature from April to October coinciding with the appearance of fry in the wild and the breeding season of wild-caught adults. Reproductive performance (egg production and quality) of first-time spawning mangrove red snapper broodstock was poorer than that of wild-caught adults. However, the results demonstrate the feasibility of developing mangrove red snapper broodstock in concrete tanks to ensure the sustainability of snapper aquaculture.

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