Investigation into reproductive biology and larval rearing technique of Acanthopagrus latus in captivity

Document Type : Research Paper

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Abstract

In this study reproductive biology of broodstock and larval rearing technique of Acanthopagrus latus was investigated. Also, different development stages of egg and larval in a period of 42 days are described. The diameter of fertilized eggs were 0.77-0.85 mm. The eggs hatched in 32 h between 19-21◦C. Newly hatched out larvae had mean body weight of 84.6 µg and total length of 1.76-1.87 mm. At the end of this study period, yellowfin seabream larval reached to 5170 µg mean body weight and standard length of 12.1-12.6 mm. Gulping the air and swim bladder inflation occurred during first week of larval life, specially as from the sixth day after hatching. In the current study larval were able to ingest and digest rotifer, artemia nauplii and microparticulate diet successfully. High mortality of larvae were observed between days 20 and 30 after hatching. Average survival rate of larval was around %43, when the study finished at day 42 after hatching. The techniques used in this research to deal with yellowfin seabream broodstock and larval were found to be suitable and led to successful spawning and larval's metamorphosis into fry in captive condition.
 

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Iranian Scientific Fisheries Journal
Volume 28, Issue 5
November and December 2019
Pages 1-12

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