Hormonal Induction of Maturation in Striped Mullet, Mugil cephalus

Abstract

The effectiveness or chronic release hormone implants for stimulating testicular and ova­rian maturation in striped mullet, Mugi/ cephalus, was examined. Ten milligram 17a.­methyltestosterone silastic capsules induced a significant increase in milt production in males For up to 11 months. Two hundred microgram luteinizing hormone releasing hormone analog pellets accelerated vitellogenesis, which led to an increase in the number or females that devel­oped an additional clutch or oocytes during the spawning season. Hormone implants therefore provide a means For mullet hatcheries to increase broodstock performance.