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Parasites as indicators of movement and population connectivity of a non-diadromous, tropical estuarine teleost: king threadfin Polydactylus macrochir

Citation

Moore, BR and Welch, DJ and Newman, SJ and Lester, RJG, Parasites as indicators of movement and population connectivity of a non-diadromous, tropical estuarine teleost: king threadfin Polydactylus macrochir, Journal of Fish Biology, 81, (1) pp. 230-252. ISSN 0022-1112 (2012) [Refereed Article]

Copyright Statement

Copyright 2012 The Authors. Journal of Fish Biology © 2012 The Fisheries Society of the British Isles

DOI: doi:10.1111/j.1095-8649.2012.03335.x

Abstract

Temporal and spatial patterns in parasite assemblages were examined to evaluate the degree of movement and connectivity of post-recruitment life-history stages of a large, non-diadromous tropical estuarine teleost, king threadfin Polydactylus macrochir, collected from 18 locations across northern Australia. Ten parasites types (juvenile stages of two nematodes and seven cestodes, and adults of an acanthocephalan) were deemed to be suitable for use as biological tags, in that they were considered to have a long residence time in the fish, were relatively easy to find and were morphologically very different to each other which aided discrimination. Univariate and discriminant function analysis of these parasites revealed little difference in temporal replicates collected from five locations, suggesting that the parasite communities were stable over the timeframes explored. Univariate, discriminant function, and Bray–Curtis similarity analyses indicated significant spatial heterogeneity, with Bray–Curtis classification accuracies ranging from 55 to 100% for locations in north-western and northern Australia, 24 to 88% in the Gulf of Carpentaria, and 39 to 88% on the east coast of Queensland. Few differences were observed among locations separated by <200 km. The observed patterns of parasite infection are in agreement with concurrent studies of movement and connectivity of P. macrochir in that they indicate a complex population structure across northern Australia. These results should be considered when reviewing the management arrangements for this species.

Item Details

Item Type:Refereed Article
Keywords:Australia, Bray–Curtis index, biological tags, fisheries management, Polynemidae, population connectivity
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Fisheries Management
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Wild Caught
Objective Field:Wild Caught Fin Fish (excl. Tuna)
Author:Moore, BR (Mr Bradley Moore)
ID Code:121427
Year Published:2012
Web of Science® Times Cited:6
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2017-09-28
Last Modified:2017-11-06
Downloads:0

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