Strong population structure deduced from genetics, otolith chemistry and parasite abundances explains vulnerability to localized fishery collapse in a large Sciaenid fish, Protonibea diacanthus

Taillebois, Laura, Barton, Diane P., Crook, David A., Saunders, Thor, Taylor, Jonathan, Hearnden, Mark, Saunders, Richard J., Newman, Stephen J., Travers, Michael J., Welch, David J., Greig, Alan, Dudgeon, Christine, Maher, Safia and Ovenden, Jennifer R. (2017) Strong population structure deduced from genetics, otolith chemistry and parasite abundances explains vulnerability to localized fishery collapse in a large Sciaenid fish, Protonibea diacanthus. Evolutionary Applications, 10 10: 978-993. doi:10.1111/eva.12499


Author Taillebois, Laura
Barton, Diane P.
Crook, David A.
Saunders, Thor
Taylor, Jonathan
Hearnden, Mark
Saunders, Richard J.
Newman, Stephen J.
Travers, Michael J.
Welch, David J.
Greig, Alan
Dudgeon, Christine
Maher, Safia
Ovenden, Jennifer R.
Title Strong population structure deduced from genetics, otolith chemistry and parasite abundances explains vulnerability to localized fishery collapse in a large Sciaenid fish, Protonibea diacanthus
Journal name Evolutionary Applications   Check publisher's open access policy
ISSN 1752-4571
1752-4563
Publication date 2017-07-12
Year available 2017
Sub-type Article (original research)
DOI 10.1111/eva.12499
Open Access Status DOI
Volume 10
Issue 10
Start page 978
End page 993
Total pages 16
Place of publication Hoboken, NJ United States
Publisher WILEY
Language eng
Subject 1105 Ecology, Evolution, Behavior and Systematics
1311 Genetics
1100 Agricultural and Biological Sciences
Abstract As pressure on coastal marine resources is increasing globally, the need to quantitatively assess vulnerable fish stocks is crucial in order to avoid the ecological consequences of stock depletions. Species of Sciaenidae (croakers, drums) are important components of tropical and temperate fisheries and are especially vulnerable to exploitation. The black-spotted croaker, Protonibea diacanthus, is the only large sciaenid in coastal waters of northern Australia where it is targeted by commercial, recreational and indigenous fishers due to its food value and predictable aggregating behaviour. Localized declines in the abundance of this species have been observed, highlighting the urgent requirement by managers for information on fine- and broad-scale population connectivity. This study examined the population structure of P. diacanthus across north-western Australia using three complementary methods: genetic variation in microsatellite markers, otolith elemental composition and parasite assemblage composition. The genetic analyses demonstrated that there were at least five genetically distinct populations across the study region, with gene flow most likely restricted by inshore biogeographic barriers such as the Dampier Peninsula. The otolith chemistry and parasite analyses also revealed strong spatial variation among locations within broad-scale regions, suggesting fine-scale location fidelity within the lifetimes of individual fish. The complementarity of the three techniques elucidated patterns of connectivity over a range of spatial and temporal scales. We conclude that fisheries stock assessments and management are required at fine scales (100 s of km) to account for the restricted exchange among populations (stocks) and to prevent localized extirpations of this species. Realistic management arrangements may involve the successive closure and opening of fishing areas to reduce fishing pressure.
Keyword Tropical Western-Australia
Scomberomorus-Semifasciatus
Stock Discrimination
Northern Australia
Holloway Current
Biological Tags
Grey Mackerel
Marine Fish
Connectivity
Sustainability
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID 2013/017
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
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Created: Sat, 25 Nov 2017, 23:08:10 EST