Native fish stocking of rivers: discriminating between hatchery-reared and wild fish. Stocking of fish is widely used in attempts to restore native fish populations. Little is known of the fate of stocked fish or the effects of stocking on resident populations. We will develop and evaluate protocols for chemical marking of otoliths of hatchery-reared fish so that their source can be determined. Experimental stocking of hatchery-reared fish will be undertaken and population structure and sourc ....Native fish stocking of rivers: discriminating between hatchery-reared and wild fish. Stocking of fish is widely used in attempts to restore native fish populations. Little is known of the fate of stocked fish or the effects of stocking on resident populations. We will develop and evaluate protocols for chemical marking of otoliths of hatchery-reared fish so that their source can be determined. Experimental stocking of hatchery-reared fish will be undertaken and population structure and source of stocked versus wild fish determined in stocked and unstocked rivers. Natural chemical signatures will also help determine important recruitment areas. The outcomes will allow fisheries managers to make informed decisions regarding stocking strategies.Read moreRead less
Estimating fishing-related mortality and designing sustainable management protocols for shark fisheries in Northern Australia. Sharks are extremely valuable economically, with the landed catch in the NT alone exceeding $10 million in 2004. The increasing world demand for high-quality protein will necessitate appropriate management so that over-exploitation does not occur as it has in most other shark fisheries worldwide. The proposed project will provide key information that will direct careful ....Estimating fishing-related mortality and designing sustainable management protocols for shark fisheries in Northern Australia. Sharks are extremely valuable economically, with the landed catch in the NT alone exceeding $10 million in 2004. The increasing world demand for high-quality protein will necessitate appropriate management so that over-exploitation does not occur as it has in most other shark fisheries worldwide. The proposed project will provide key information that will direct careful and informed management decisions well into the future. The added benefit of collecting information on the rarer and more susceptible non-target species caught in this fishery will ensure that any negative impacts are reduced. The project will also provide information on the potential impact of illegal fishing by neighbouring countries to our north.Read moreRead less