133806 - Population dynamics and life-history plasticity of mackerel icefish.pdf (676.43 kB)
Download filePopulation dynamics and life-history plasticity of mackerel icefish (Champsocephalus gunnari) within the vicinity of Heard Island and the McDonald Islands
conference contribution
posted on 2023-05-23, 14:08 authored by Dale MaschetteDale Maschette, Welsford, DMackerel icefish (Champsocephalus gunnari) are found associated with sub-Antarctic islands and continental shelves in the Atlantic and Indian sectors of the Southern Ocean between the Polar Front and the Southern Boundary of the Antarctic Circumpolar Current. Mackerel icefish are one of the most common fishes encountered across the shallow (<500 m) Kerguelen Plateau north of 60°S. The species was targeted in this area by unregulated fisheries in the 1970s until fishing ceased due to low catch rates, the declaration of the French exclusive economic zone (EEZ) around Iles Kerguelen and the Australian Fishing Zone around Heard and McDonald Islands (HIMI). Commercial fishing of mackerel icefish by Australian vessels at HIMI commenced in 1997 and continues to this day. Catches are characterised by high interannual variability, due in large part to the population being dominated by a single year class, resulting from recruitment that occurs on a three-year cycle.
History
Publication title
The Kerguelen Plateau: marine ecosystem and fisheries. Proceedings of the Second SymposiumEditors
D Welsford, J Dell and G DuhamelPagination
255-258ISBN
9781876934309Department/School
Institute for Marine and Antarctic StudiesPublisher
Australian Antarctic DivisionPlace of publication
AustraliaEvent title
The Kerguelen Plateau: marine ecosystem and fisheriesEvent Venue
Hobart, TasmaniaDate of Event (Start Date)
2017-11-13Date of Event (End Date)
2017-11-14Rights statement
Copyright 2017 The Department of the Environment and Energy, Australian Antarctic DivisionRepository Status
- Open