DOI: 10.5061/dryad.9rs5d
title: Data from: Strong population structure deduced from genetics, otolith chemistry and parasite abundances explains vulnerability to localised fishery collapse in a large Sciaenid fish, Protonibea diacanthus

description: 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. Localised 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
 northwestern 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 km) to account for the restricted
 exchange among populations (stocks) and to prevent localised extirpations
 of this species. Realistic management arrangements may involve the
 successive closure and opening of fishing areas to reduce fishing
 pressure.
description: Protonibea diacanthus
 microsatellite genotypesThis file contains the
 individual genotypes used for the paper entitled "Strong population
 structure deduced from genetics, otolith chemistry and parasite abundances
 explains vulnerability to localised fishery collapse in a large Sciaenid
 fish, Protonibea diacanthus".Protonibea
 diacanthus_Microsatellite data_Dryad
 entry.xlsxProtonibea diacanthus
 parasites dataThis file contains the
 individual parasites assemblage and abundance used in the paper entitled
 "Strong population structure deduced from genetics, otolith chemistry
 and parasite abundances explains vulnerability to localised fishery
 collapse in a large Sciaenid fish, Protonibea
 diacanthus"Protonibea diacanthus_Parasites
 data_Dryad entry.xlsProtonibea diacanthus
 otolith microchemistry dataThis file contains the
 individual otolith microchemistry data used for the paper entitled
 "Strong population structure deduced from genetics, otolith chemistry
 and parasite abundances explains vulnerability to localised fishery
 collapse in a large Sciaenid fish, Protonibea
 diacanthus"Protonibea diacanthus_Otoliths
 data_Dryad entry.csv