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The D'Entrecasteaux Channel scallop fishery : its past, present and future


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Perrin, Richard Anthony 1986 , 'The D'Entrecasteaux Channel scallop fishery : its past, present and future', Coursework Master thesis, University of Tasmania.

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The past and present structure and management of the
D'Entrecasteaux Channel scallop fishery is examined with a view to
providing a basis for the future management of the fishery.
The fishery has suffered mixed fortunes since its beginnings in
the early 1920's. Production has fluctuated markedly over the years,
reaching a peak in 1961, and subsequently collapsing. The fishery was
closed from 1970 - 1981, re-opened from 1982 - 1985, but closed again
in 1986.
The causes of the fluctuations in scallop production, and its
collapse in the 1960's, .include changes in fishing technology,
excessive fishing effort and the inherent variability in the annual
recruitment of scallops. The 1986 closure was forced by evidence of
over-fishing, and the sudden appearance of the toxic dinoflagellate
alga Gymnodinium catenatum Graham in the Channel area.
There is a lack of a comprehensive management plan for the
D'Entrecasteaux Channel scallop fishery, and this is a serious
obstacle to the successful conservation and utilization of the
resource, as many of the administrative and biological problems, such
as excessive fishing effort and the variable spatfall of scallops, are
difficult to overcome. Moreover, there have been unexpected
developments since the re-opening of the fishery in 1982: a great many
more amateur fishermen now participate in the fishery, and the
doughboy scallop (Chlamys asperrimus Lamarck) is now more numerous
than the commercial scallop (Pecten fumata Tate).
Theoretical and practical management techniques applied in other
fisheries are examined and assessed. Because of its flexible nature,
the concept of Optimum Sustainable Yield appears most suitable for the
Channel fishery, and practical management should continue to include
catch quotas, gear limitations, area closures, seasons, and size
limits, as they provide a degree of control over fishing effort.
Specific recommendations made are that the Channel scallop
fishery should be amateur-only while scallop stocks remain low, that
the level of enforcement and fines for breaches of fisheries
regulations should be increased, and that research on scallops in the
Channel, particularly the doughboy scallop, should be upgraded.

Item Type: Thesis - Coursework Master
Authors/Creators:Perrin, Richard Anthony
Keywords: Scallop fisheries, Scallops, Fishery management, Fishes
Copyright Holders: The Author
Copyright Information:

Copyright the Author - The University is continuing to endeavour to trace the copyright owner(s) and in the meantime this item has been reproduced here in good faith. We would be pleased to hear from copyright owner(s).

Additional Information:

Thesis (M.Env.St.)--University of Tasmania, 1987. Bibliography: leaves 119-139.

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