Allozyme and microsatellite DNA markers of toothfish population structure in the Southern Ocean

Smith, Peter; McVeagh, Margaret

doi:10.1111/j.1095-8649.2000.tb02245.x

Cited by 46 publications

(27 citation statements)

References 32 publications

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“…It is unclear which model is the most appropriate for microsatellite data, and several authors regard the solution to lie between the extremes of IAM and SMM (Bagley et al 1999;Nei and Kumar 2000). Several recent applications of microsatellites to spatial differentiation in fisheries species have reported similar results with F ST and R ST (Ruzzante et al 1996;Smith and McVeagh 2000). Given the concordance between mtDNA and microsatellite results reported here for mangrove jack, it is unlikely that the implementation of R ST would uncover hidden population subdivision.…”

Section: Population Genetic Structuresupporting

confidence: 85%

Genetic population structure of mangrove jack, Lutjanus argentimaculatus (Forsskål)

Ovenden¹,

Street²

2003

Mar. Freshwater Res.

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Abstract. Translocations of mangrove jack, Lutjanus argentimaculatus (Forsskål 1775), to increase angling opportunities in artificial impoundments are foreshadowed in Queensland. To evaluate genetic population structure before translocations occur, mangrove jack were collected from three sites on the Queensland coast and from one site on the north-western coast of Western Australia. Allelic variation at four dinucleotide microsatellite loci was high: gene diversity (heterozygosity) ranged from 0.602 to 0.930 and allelic counts from 10 to 24. Genetic differentiation among collection sites was weak: estimates of F ST were 0.002 for all four sites, and less (F ST = 0.001) across a major biogeographical boundary (the Torres Strait region). Nucleotide sequence from two mitochondrial regions (control, 375 base pairs, and ATPase, 415 base pairs) was obtained from a subset of the Australian and additional Indo-Pacific (Indonesian and Samoan) mangrove jack. Haplotype diversity was high (control region, 33 haplotypes for 34 fish; ATPase region, 13 haplotypes for 56 fish). Phylogenetic analysis of mitochondrial DNA sequence data could not discern a relationship between tree topology and geography. These results suggest that mangrove jack in Queensland, and possibly throughout Australia, experience high levels of gene flow. The artificial gene flow caused by permitted translocations is unlikely to exceed natural levels. Fine-scale ecological matching between donor and recipient populations may increase stocking success, and is important if translocation is needed as a species recovery tool in the future.

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Section: Population Genetic Structuresupporting

confidence: 85%

Genetic population structure of mangrove jack, Lutjanus argentimaculatus (Forsskål)

Ovenden¹,

Street²

2003

Mar. Freshwater Res.

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“…These two loci have also shown the lowest (cmrDe13) and highest (cmrDe9) allele numbers in other studies performed with the five markers used here (Reilly & Ward, 1999;Smith & McVeagh, 2000;Appleyard et al, 2002Appleyard et al, , 2004Shaw et al, 2004;Rogers et al, 2006).…”

supporting

confidence: 70%

“…We tested five microsatellite markers (cmrDe2, cmrDe4, cmrDe9, cmrDe13, and cmrDe30) (Reilly & Ward, 1999) in an offshore Chilean population. These markers had been commonly used in genetic diversity studies to evaluate the distribution and population structure of the Patagonian toothfish in the Southern Ocean, Antarctic Islands, Patagonian shelf (Falkland/Malvinas Islands), and Atlantic, West and Western Indian Ocean sectors (Smith & McVeagh, 2000;Appleyard et al, 2002Appleyard et al, , 2004Shaw et al, 2004;Rogers et al, 2006). Our main objectives were to evaluate genetic diversity and estimate paternity/ maternity exclusion probabilities, in order to evaluate the potential utility of these five markers in broodstock management.…”

mentioning

confidence: 99%

Utility of five SSR markers for genetic diversity and paternity exclusion analysis in the Patagonian toothfish

Araneda¹,

Lam²,

Iturra³

et al. 2017

lajar

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ABSTRACT. The Patagonian toothfish or Chilean sea bass (Dissostichus eleginoides), found in the Southern Ocean surrounding Antarctica, is an important fishery species for Chile. This high-value species is regarded as overfished, making it an attractive target for aquaculture. When developing a reproduction program for any aquaculture species, it is important to implement genetic tools to evaluate diversity, inbreeding, and parentage. We calculated genetic diversity and paternity/maternity exclusion probabilities based on five commonly-used microsatellite loci in a natural population of Patagonian toothfish from southern Chile (n = 34) in order to evaluate the potential utility of these five markers in stock management. The observed number of alleles per locus (Na) and observed heterozygosities (HO) are within range as described by studies performed in other subAntarctic regions. All five loci were strongly polymorphic, with HO > 0.6 and Na > 7, and paternity exclusion probabilities were high (PE > 0.99), indicating the potential utility of these loci in paternity/maternity exclusion analyses of Patagonian toothfish.

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“…Genetic data indicate considerable population heterogeneity (e.g. Smith & McVeagh 2000, Appleyard et al 2002 and a substantial barrier to gene flow between the North Scotia Ridge and South Georgia (Shaw et al 2004, Rogers et al 2006. These results corroborated length-at-age data that imply that the ACC structures populations by mitigating cross-frontal movement and promoting advection of vulnerable life stages downstream (Ashford 2001, Ashford et al 2003.…”

Section: Do Otolith Chemistry and Population Structure Vary At Matchimentioning

confidence: 77%

Otolith chemistry reflects frontal systems in the Antarctic Circumpolar Current

Ashford¹,

Arkhipkin²,

Jones³

2007

Mar. Ecol. Prog. Ser.

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Pronounced environmental trends across fronts suggest that the otolith chemistry of oceanic fish can resolve zones on either side, promoting application to population questions at similar spatial scales. Trace and minor elements laid down immediately prior to capture -along the edges of otoliths from Patagonian toothfish Dissostichus eleginoides -discriminated frontal zones in the Antarctic Circumpolar Current in the Southwestern Atlantic Ocean. Mean values differentiated sampling areas by up to 2.6 standard deviations, suggesting: (1) otolith Mg/Ca enrichment related to fish activity around the Burdwood Bank; (2) Mn/Ca enrichment associated with South America; (3) Sr/Ca linked to the presence of Circumpolar Deep Water; and (4) Ba/Ca to nutrient production and mixing. In the Polar Frontal Zone, meanders or eddies may account for affinities with neighbouring sampling areas, bringing water from the Subantarctic and Antarctic Zones onto the North Scotia Ridge. Moreover, fish age showed a significant relationship with depth and improved cross-validation by 14%, giving 85% classification rates to South American and Antarctic regions, and 57 tο 83% to areas along the Patagonian Shelf. These results indicate that otolith chemistry reflects hydrography, detecting oceanic gradients across the slope of continental shelves and between zones separated by strong trends like fronts.KEY WORDS: Otoliths ⋅ Spatial ecology ⋅ Fishery ⋅ Laser-ICPMS ⋅ Patagonian toothfish ⋅ Southern Ocean Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 351: [249][250][251][252][253][254][255][256][257][258][259][260] 2007 ulation structuring occurs where differences in biogeochemistry are small, the mismatch can render the technique ineffective. The research questions that otolith chemistry can address, therefore, depend on whether the scale at which it varies matches the scale at which populations are structured. Environmental structuring by the Antarctic Circumpolar Current (ACC)The ACC connects the southern hemisphere continents and islands and banks around the Antarctic. Within it, the Subantarctic Front (SAF), Polar Front (PF), and Southern ACC Front (SACCF) are identifiable around the continent (Orsi et al. 1995), penetrate the entire water column (e.g. Nowlin & Clifford 1982) and appear stable where they flow over large bathymetric features (Hofmann 1985). Frontal current jets account for most ACC transport. Between them are quiescent zones of slower moving water. The Subantarctic Zone is bounded on its equatorial side by the Subtropical Front (STF) and poleward by the SAF. Between the SAF and the PF lies the Polar Frontal Zone; south of the PF is the Antarctic Zone (Pollard et al. 2002).The contribution of temperature and salinity to vertical stratification distinguishes the 3 zones (Pollard et al. 2002). In the Subantarctic Zone, temperature dominates over salinity, so that a subsurface salinity minimum associated with Antarctic Intermediate Water (AAIW) is stable because of relat...

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Allozyme and microsatellite DNA markers of toothfish population structure in the Southern Ocean

Cited by 46 publications

References 32 publications

Genetic population structure of mangrove jack, Lutjanus argentimaculatus (Forsskål)

Genetic population structure of mangrove jack, Lutjanus argentimaculatus (Forsskål)

Utility of five SSR markers for genetic diversity and paternity exclusion analysis in the Patagonian toothfish

Otolith chemistry reflects frontal systems in the Antarctic Circumpolar Current

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