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Stock structure of blue threadfin Eleutheronema tetradactylum across northern Australia, as indicated by parasites

journal contribution
posted on 2023-05-19, 12:25 authored by Bradley MooreBradley Moore, Stapley, J, Allsop, Q, Newman, SJ, Ballagh, A, Welch, DJ, Lester, JG
The parasite fauna of the blue threadfin Eleutheronema tetradactylum, collected from 14 sites across northern Australia, was examined to evaluate the degree of movement and subsequent stock structure of the fish. Univariate and multivariate analysis of nine ‘permanent’ parasite species [the nematodes Anisakis (type I) and Terranova (type II), the cestodes Otobothrium australe, Pterobothrium pearsoni, Pterobothrium sp. A, Callitetrarhynchus gracilis, Parotobothrium balli and Nybelinia sp., and the acanthocephalan Pomphorhynchus sp.] demonstrated little similarity between sites, indicating limited mixing and therefore long-term separation of post-juvenile fish. As such, the effects of fishing are likely to be localized within the current administrative boundaries, implying little need for interstate co-operative management. Within each jurisdiction, management of E. tetradactylum populations, including the establishment of harvest strategies and fishery regulations, should be conducted in a way that recognizes the resident nature of the fish.

History

Publication title

Journal of Fish Biology

Volume

78

Pagination

923-936

ISSN

0022-1112

Department/School

Institute for Marine and Antarctic Studies

Publisher

Blackwell Publishing Ltd

Place of publication

9600 Garsington Rd, Oxford, England, Oxon, Ox4 2Dg

Rights statement

Copyright 2011 The Authors

Repository Status

  • Restricted

Socio-economic Objectives

Wild caught fin fish (excl. tuna)

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