Abstract
Juvenile tarwhine ( Rhabdosargus sarba) and yellowfin bream ( Acanthopagrus australis) were shown to be competitors with school prawns in farming ponds. Relatively small yellowfin bream also appeared to be predators of these prawns. In contrast, sea mullet ( Mugil cephalus), tiger mullet ( Liza argentea), silver-biddies ( Gerres ovatus), transparent gobies ( Gobiopterus semivestita) and estuarine shore crabs ( Paragrapsus laevis) apparently had little effect on school prawns. The above relationships are discussed in terms of dietary overlap and a detailed description of the stomach contents of school prawns from a farming pond is given. The effect of sea mullet stocking density on the growth of this species of fish is briefly discussed.
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