The stock structure of grey mackerel Scomberomorus semifasciatus in Australia as inferred from its parasite fauna

Charters, R.; Lester, R. J. G.; Buckworth, Rik C.; Newman, Stephen J.; Ovenden, Jennifer R.; Broderick, Damien; Kravchuk, Olena; Ballagh, Aaron C.; Welch, David J.

doi:10.1016/j.fishres.2009.09.011

Cited by 15 publications

(12 citation statements)

References 13 publications

(13 reference statements)

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“…It is important to note that in stock structure studies caution should be applied when using a single method in isolation from other methods, as detecting no significant differences among sample locations does not necessarily mean they are the same stock for management purposes. The results of this study are similar to those determined by Charters et al (2010) using parasites as a stock discrimination tool except that they show separation of the Northern Territory north west coast site (S2) from all the Gulf of Carpentaria locations.…”

Section: Discussionsupporting

confidence: 84%

“…This suggests that the Grey Mackerel populations in the Gulf of Carpentaria waters are widely inter-mixed. The Northern Territory northwest coast site (S2) was found to be separate from the Gulf of Carpentaria locations from the analysis of the parasite fauna of S. semifasciatus in a related study (Charters et al 2010). It is important to note that in stock structure studies caution should be applied when using a single method in isolation from other methods, as detecting no significant differences among sample locations does not necessarily mean they are the same stock for management purposes.…”

Section: Discussionmentioning

confidence: 99%

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Stock structure of Grey Mackerel, Scomberomorus semifasciatus (Pisces: Scombridae) across northern Australia, based on otolith stable isotope chemistry

et al. 2010

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The stable isotopes of δ 18 O and δ 13 C in sagittal otolith carbonates were used to determine the stock structure of Grey Mackerel, Scomberomorus semifasciatus. Otoliths were collected from Grey Mackerel at ten locations representing much of their distributional and fisheries range across northern Australia from 2005 to 2007. Across this broad range (∼ 6500 km), fish from four broad locationsWestern Australia (S1), Northern Territory and Gulf of Carpentaria (S2, S3, S4, S5, S6, S7), Queensland east coast mid and north sites (S8, S9) and Queensland east coast south site (S10)-had stable isotope values that were significantly different indicating stock separation. Otolith stable isotopes differed more between locations than among years within a location, indicating temporal stability across years. The spatial separation of these populations indicates a complex stock structure across northern Australia. Stocks of S. semifasciatus appear to be associated with large coastal embayments. These results indicate that optimal fisheries management may require a review of the current spatial arrangements, particularly in relation to the evidence of shared stocks in the Gulf of Carpentaria. Furthermore, as the population of S. semifasciatus in Western Australia exhibited high spatial separation from those at all the other locations examined, further research activities should focus on investigating additional locations within Western Australia for an enhanced determination of stock delineation.

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Section: Discussionsupporting

confidence: 84%

Section: Discussionmentioning

confidence: 99%

Stock structure of Grey Mackerel, Scomberomorus semifasciatus (Pisces: Scombridae) across northern Australia, based on otolith stable isotope chemistry

et al. 2010

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“…The population structure of S. semifasciatus has been analysed with the same multidisciplinary approach. The genetic findings complement inferences from otolith stable-isotope chemistry , parasite distribution and abundance (Charters et al, 2010) and growth estimates (Ballagh et al, 2009).…”

Section: Introductionsupporting

confidence: 60%

“…While this finding indicates that movement of fish through this habitat is considerable over ecological time scales, it does not preclude the possibility of limited movement over generational time scales; a time scale more relevant to the management of fish stocks. That said, evidence gathered from other stock discrimination techniques (Ballagh et al , 2009; Charters et al , 2010; Newman et al , 2010) is consistent with considerable movement of S. semifasciatus in the Gulf of Carpentaria. Other fisheries in the Gulf of Carpentaria are managed cooperatively, so the co‐ordinated management of the S. semifasciatus resource is well within the capabilities of fisheries management authorities.…”

Section: Discussionmentioning

confidence: 62%

Genetic population structure of grey mackerel Scomberomorus semifasciatus in northern Australia

Broderick¹,

Ovenden²,

Buckworth

et al. 2011

Journal of Fish Biology

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This study used mtDNA sequence and microsatellite markers to elucidate the population structure of Scomberomorus semifasciatus collected from 12 widespread sampling locations in Australia. Samples (n = 544) were genotyped with nine microsatellite loci, and 353 were sequenced for the control (384 bp) and ATPase (800 bp) mtDNA gene regions. Combined interpretation of microsatellite and mtDNA data identified four genetic stocks of S. semifasciatus: Western Australia, north-west coast of the Northern Territory, Gulf of Carpentaria and the eastern coast of Queensland. Connectivity among stocks across northern Australia from the Northern Territory to the eastern coast of Queensland was high (mean F(ST) = 0·003 for the microsatellite data and Φ(ST) = 0·033 and 0·009 for control region and ATPase, respectively) leading to some uncertainty about stock boundaries. In contrast, there was a clear genetic break between the stock in Western Australia compared to the rest of northern Australia (mean F(ST) = 0·132 for the microsatellite data and Φ(ST) = 0·135 and 0·188 for control region and ATPase, respectively). This indicates a restriction to gene flow possibly associated with suboptimal habitat along the Kimberley coast (north Western Australia). The appropriate scale of management for this species corresponds to the jurisdictions of the three Australian states, except that authorities in Queensland and Northern Territory should co-ordinate the management of the Gulf of Carpentaria stock.

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“…While the relatively small sample sizes for the Roper and Wenlock Rivers may have confounded analyses at these locations, the similarities observed among temporal replicate samples from Roebuck Bay and the Flinders and Fitzroy River suggests that the parasite communities at these locations were stable over the timeframes explored. Several studies have reported similar results over comparable timeframes (Campbell et al , 2007; Charters et al, 2010). The lack of temporal variation reported in these studies, however, should not be taken as evidence that parasite communities are stable over these timeframes, in general.…”

Section: Discussionmentioning

confidence: 58%

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

Moore

Welch

Newman

et al. 2012

Journal of Fish Biology

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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.

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The stock structure of grey mackerel Scomberomorus semifasciatus in Australia as inferred from its parasite fauna

Cited by 15 publications

References 13 publications

Stock structure of Grey Mackerel, Scomberomorus semifasciatus (Pisces: Scombridae) across northern Australia, based on otolith stable isotope chemistry

Stock structure of Grey Mackerel, Scomberomorus semifasciatus (Pisces: Scombridae) across northern Australia, based on otolith stable isotope chemistry

Genetic population structure of grey mackerel Scomberomorus semifasciatus in northern Australia

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

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