Genetically isolated stocks of orange roughy (Hoplostethus atlanticus), but not of hoki (Macruronus novaezelandiae), in the Tasman Sea and Southwest Pacific Ocean around New Zealand

Smith, Peter; McVeagh, S. M.; Ede, A J

doi:10.1007/bf00349261

Cited by 27 publications

(13 citation statements)

References 40 publications

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“…Around New Zealand, at least two breeding stocks have been identified based on morphometric comparisons (Livingston & Schofield 1996), although mtDNA RFLPs and cytochrome b sequences failed to reveal any population subdivision (Baker et al 1995;Smith et al 1996). Off Chile, the Patagonian grenadier is thought to form a single stock, based on the absence of differences in allozymes, mtDNA RFLP, morphologic and parasitological analyses (Galleguillos et al 1998).…”

Section: Discussionmentioning

confidence: 99%

Lack of divergence in the mitochondrial cytochromebgene betweenMacruronusspecies (Pisces: Merlucciidae) in the Southern Hemisphere

Olavarría

Balbontín

Bernal

et al. 2006

New Zealand Journal of Marine and Freshwater Research

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Two species of grenadier, the blue grenadier (or hoki) Macruronus novaezelandiae and the Patagonian grenadier M. magellanicus, have been recorded in the Southern Hemisphere with disjunct distributions along southern Australia-New Zealand and southern Chile-Argentina, respectively. The extent of genetic difference between these two putative species was examined using partial sequences (n = 44; 405 bp) of the mitochondrial DNA cytochrome b gene in a phylogenetic analysis and in an analysis of molecular variance (AMOVA). Our analysis showed a lack of genetic differentiation between species (F ST = -0.02275, Φ ST = -0.00250) and among stocks. This absence of genetic differences is consistent with recent larval and adult morphology data suggesting that the two species should be synonymised. A comparable lack of genetic isolation has been observed in other closely related taxa (genera Merluccius and Micromesistius) with similar disjunct distributions across the Southern Hemisphere.

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Section: Discussionmentioning

confidence: 99%

Lack of divergence in the mitochondrial cytochromebgene betweenMacruronusspecies (Pisces: Merlucciidae) in the Southern Hemisphere

Olavarría

Balbontín

Bernal

et al. 2006

New Zealand Journal of Marine and Freshwater Research

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“…1). The Subtropical Convergence is a major barrier for many species (Robertson et al 1978) and may restrict gene flow in species which bisect the convergence, for example the frequency of orange roughy mtDNA haplotypes differ significantly among population samples north and south of the convergence (Smith et al 1996).…”

Section: Discussionmentioning

confidence: 99%

Allozyme variation in scampi (Metanephrops challengeri) fisheries around New Zealand

Smith

1999

New Zealand Journal of Marine and Freshwater Research

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Scampi (Metanephrops challengeri Balss, 1914) support a significant fishery in New Zealand waters. Allozyme analysis of samples from four fishery areas found a low level of genetic variation but significant heterogeneity in allele frequencies. There were significant differences between samples from the Auckland Island Shelf and those from mainland New Zealand at three loci, but only one locus showed heterogeneity among mainland samples.

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“…Using a restriction enzyme analysis of mitochondrial DNA, Smolenski et al (1993) surveyed samples from seven locations in Australia, New Zealand, and South Africa and found evidence for genetic separation among southeastern Australian and New Zealand samples. Genetic structure was found among different sites off the coast of New Zealand by Smith et al (1996) using RFLP analysis and by with allozyme loci. In another study based on multiple techniques, Smith et al (2002b) also found evidence for differentiation among populations off the west coast of New Zealand with the analysis of otolith shape, fish size, and restriction digest of the whole mitochondrial genome.…”

Section: Introductionmentioning

confidence: 99%

Low levels of global genetic differentiation and population expansion in the deep-sea teleost Hoplostethus atlanticus revealed by mitochondrial DNA sequences

2012

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The orange roughy Hoplostethus atlanticus is a well-known commercial species with a global distribution.There is no consensus about levels of connectivity among populations despite a range of techniques having been applied. We used cytochrome c oxidase subunit I (COI) and cytochrome b sequences to study genetic connectivity at a global scale. Pairwise U ST analyses revealed a lack of significant differentiation among samples from New Zealand, Australia, Namibia, and Chile. However, low but significant differentiation (U ST = 0.02-0.13, P \ 0.05) was found between two Northeast Atlantic sites and all the other sites with COI. AMOVA and the haplotype genealogy confirmed these results. The prevalent lack of genetic differentiation is probably due to active adult dispersal under the stepping-stone model. Demographic analyses suggested the occurrence of two expansion events during the Pleistocene period.

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Genetically isolated stocks of orange roughy (Hoplostethus atlanticus), but not of hoki (Macruronus novaezelandiae), in the Tasman Sea and Southwest Pacific Ocean around New Zealand

Cited by 27 publications

References 40 publications

Lack of divergence in the mitochondrial cytochromebgene betweenMacruronusspecies (Pisces: Merlucciidae) in the Southern Hemisphere

Lack of divergence in the mitochondrial cytochromebgene betweenMacruronusspecies (Pisces: Merlucciidae) in the Southern Hemisphere

Allozyme variation in scampi (Metanephrops challengeri) fisheries around New Zealand

Low levels of global genetic differentiation and population expansion in the deep-sea teleost Hoplostethus atlanticus revealed by mitochondrial DNA sequences

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