The Israeli Journal of Aquaculture - Bamidgeh 55(1), 2003, 22-30

NATURAL SPAWNING AND REARING OF
MANGROVE RED SNAPPER,
LUTJANUS ARGENTIMACULATUS, LARVAE IN CAPTIVITY


Ming-Yih Leu ¹*, I-Hui Chen ¹ and Lee-Shing Fang ¹,²

1 National Museum of Marine Biology and Aquarium, Checheng, Pingtung, Taiwan 944, Republic of China
2 Institute of Marine Resources, National Sun Yat-Sen University, Kaohsiung, Taiwan 804, Republic of China


(Received 30.7.02, Accepted 30.9.02)

Key words: abnormalities, cannibalism, larvae rearing, snapper, spawning

Abstract

Mangrove red snapper (Lutjanus argentimaculatus, Forsskål) spawned naturally in captivity, without the use of hormones or other treatments, from May 21 to September 15,1999. Each female laid an average 2,350,000 eggs. Larvae were reared in 4-ton circular fiberglass tanks. They were first fed S-type rotifers (Brachionus rotundiformis). Later, Artemia nauplii and cope-pods were added to the diet. They were weaned onto an artificial diet. Metamorphosis began at 18 days when the larvae reached 10.5 mm total length and was complete by day 30 when larvae were 17.2 mm. From day 26, large larvae (over 25 mm) cannibalized their smaller siblings. Abnormalities were observed in 4.9% of the individuals. At 50 days, the larvae rearing trial produced juveniles of 49 mm average total length with a survival of 10.8-32.3%.


*Corresponding author:
Tel.: 886-8-882-5001 ext. 8024, fax:886-8-882-5066, e-mail: myl@nmmba.gov.tw

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