Reproductive biology of school mackerel (Scomberomorus queenslandicus) and spotted mackerel (S. munroi) in Queensland east-coast waters

Abstract

Spatial and temporal spawning patterns of school mackerel (Scomberomorus queenslandicus) and spotted mackerel (S. munroi) in Queensland east-coast waters, Australia, (16˚S to 28˚S), were examined to provide reproductive parameters required for the management and protection of spawning stocks. School mackerel spawned along the Queensland coastline from October to January. Female school mackerel were sexually mature between 401 and 450 mm, and males between 351 and 400 mm LCF (length to caudal fork). In contrast, spotted mackerel spawned in northern Queensland waters from August to October. Females were between 451 and 500 mm, and males 401 and 450 mm LCF at first maturity. Both species were found to be dioecious. Differential spawning patterns of school and spotted mackerel may help the species coexist and maintain the integrities of the species and their respective stock structures.