SUMMARY

SUMMARY

IDENTIFICATION

SCIENTIFIC NAME(s)

Nemadactylus macropterus

SPECIES NAME(s)

Tarakihi, Jackass morwong

COMMON NAMES

Deep Sea Perch, Jackass Fish, Morwong, Mowi

Jackass Morwong (Nemadactylus macropterus) are distributed around the southern half of Australia (including Tasmania), from Moreton Bay in Queensland to Perth in WA, New Zealand, the St Paul and Amsterdam Islands (Indian Ocean), and off south-eastern South America and southern Africa. They occur to depths of 450 m and, in Australian waters, are most abundant between 100 and 200 m. Recent genetic studies conducted by CSIRO have shown no evidence of separate stocks in Australian waters, but New Zealand and Australian stocks are distinct. Analysis of otolith microstructure found differences between Jackass Morwong from southern Tasmania and those off NSW and Victoria, but it is unclear if such differences indicate separate stocks (AFMA 2012).

Differences among Jackass Morwong in the western and eastern zones have been suggested, and it was assumed for the purposes of this assessment that there are separate stocks of Jackass Morwong in the eastern and western zones (AFMA 2012).

The commercial harvest is predominantly by trawlers in the Commonwealth Southern and Eastern Scalefish and Shark Fishery. Commonwealth assessment is based on a full population model which shows a very significant decline in biomass since the 1980s. The biomass has recently been estimated to be about 20% of the unexploited level (Wilson et al. 2009).


ANALYSIS

No related analysis

SCORES

Management Quality:

Management Strategy:

≥ 6

Managers Compliance:

NOT YET SCORED

Fishers Compliance:

10.0