Stock structure of Sebastes mentella in the North Atlantic revealed by chemometry of the fatty acid profile in heart tissue

Joensen, Hóraldur; Grahl‐Nielsen, Otto

doi:10.1016/j.icesjms.2003.10.002

Cited by 20 publications

(19 citation statements)

References 41 publications

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“…Our results showed a clear segregation of two gene pools of the pelagic S. mentella in the Irminger Sea and support earlier findings (for example, Johansen et al, 2000;Roques et al, 2002;Joensen and Grahl-Nielsen, 2004;Stefánsson et al, 2004. Bayesian-based methods (Supplementary Appendix S5, see Supplementary material and Table 1) were supported by the more traditional approaches such as the pairwise comparison plotted in Figure 4.…”

Section: Genetic Differentiationsupporting

confidence: 92%

Pleistocene genetic legacy suggests incipient species of Sebastes mentella in the Irminger Sea

et al. 2009

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Section: Genetic Differentiationsupporting

confidence: 92%

Pleistocene genetic legacy suggests incipient species of Sebastes mentella in the Irminger Sea

et al. 2009

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“…Regarding chemical analyses, a pilot study of using Cs-137 as a population marker indicated a closer relationship of redfish from Faroese waters to samples from the Barents Sea than to Icelandic samples. This was partly confirmed by fatty acid analyses of Joensen and Grahl-Nielsen (2002), dividing the occurrences of S. mentella around the Faroe Islands into one group related with the Icelandic shelf and another group connected to the Norwegian coast. Within the Irminger Sea, however, they reported considerable heterogeneity.…”

Section: Introductionmentioning

confidence: 70%

Review of the population structure and ecology of S. mentella in the Irminger sea and adjacent waters

Saborido-Rey

Garabana

Stransky

et al. 2004

Rev Fish Biol Fisheries

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page 455 Introduction 455 Redfish spawning areas and time 458 Larvae and fry (0-group) distribution and drift patterns 459 Juvenile distribution, nursery areas, and migration pattern 463 Adult distribution 463 Genetic differentiation 471 Conclusions 474 Acknowledgements 475 References 475 AbstractSignificant controversies exist over the three types of Sebastes mentella found in the Irminger Sea and adjacent waters. Preliminary genetic studies have given evidence for the existence of three distinct groups, characterized using several molecular genetic markers. The biological or ecological significance of these between-group differences has, however, not been evaluated. In the present paper, we review the life cycle of S. mentella in this area, based on published data. Spawning of S. mentella in the Irminger Sea takes place in a single area above Reykjanes Ridge. The larvae drift towards East Greenland from where they are carried to West Greenland (NAFO Subareas 0+1). Later they return to East Greenland where the main nursery area has been identified. There is evidence for a migration of juvenile fish from the nursery area into the open Irminger Sea, where many different cohorts spawn. We also compare these ecological data with the genetic results and we conclude that the observed genetic differences can be derived from possible genetic drift, selection or mostly from temporal variation (age dependency) which has also been reported for other species with as high longevity as S. mentella. We conclude that S. mentella in the Irminger Sea and adjacent waters comprises one single population.

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“…A pilot study of , using Cs-137 as population marker, indicated a closer relationship of redfish from Faroese waters to samples from the Barents Sea than to Icelandic samples. Fatty acid analyses of Joensen and Grahl-Nielsen (2004) separate the occurrences of S. mentella around the Faroe Islands into one group related with fish from the southeastern Icelandic shelf and deeper parts of the northeastern Irminger Sea from another group connected to the Norwegian coast.…”

Section: Discussionmentioning

confidence: 99%

Geographic variation of golden redfish (Sebastes marinus) and deep-sea redfish (S. mentella) in the North Atlantic based on otolith shape analysis

Stransky

2005

ICES Journal of Marine Science

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Geographic variation of golden redfish (Sebastes marinus) and deep-sea redfish (S. mentella) in the North Atlantic based on otolith shape analysis Christoph Stransky Stransky, C. 2005. Geographic variation of golden redfish (Sebastes marinus) and deep-sea redfish (S. mentella) in the North Atlantic based on otolith shape analysis. e ICES Journal of Marine Science, 62: 1691e1698.The unresolved interrelationships of North Atlantic redfish stocks have prevented adaptive fisheries assessment and management in the past. Otolith shapes of golden redfish (S. marinus) and deep-sea redfish (S. mentella) were analysed for geographic variation within the entire distribution range in the North Atlantic, in order to evaluate this technique for stock separation. Multivariate analysis of elliptical Fourier shape descriptors revealed high similarity of S. marinus within the central North Atlantic areas (West and East Greenland, Iceland) that were relatively well separated from the Flemish Cap and Barents Sea samples. A similar separation of the Barents Sea area was also observed for S. mentella, whereas the western (Flemish Cap, Davis Strait) and central areas were overlapping to a greater extent. The overall classification rate given by discriminant analysis was poor for both species ( !50%) but increased to 72e74% by combining sampling areas to regions (west, central, east). Geographic variation in otolith shapes of both redfish species suggests a separation of the Northeast Arctic stocks (Barents Sea) of both species from the other redfish stocks assessed within ICES and NAFO, whereas similarities observed for the highly migratory S. mentella give reason for integrated management of demersal and pelagic occurrences of this important fisheries resource that straddles the ICES/NAFO boundaries.

show abstract

Stock structure of Sebastes mentella in the North Atlantic revealed by chemometry of the fatty acid profile in heart tissue

Cited by 20 publications

References 41 publications

Pleistocene genetic legacy suggests incipient species of Sebastes mentella in the Irminger Sea

Pleistocene genetic legacy suggests incipient species of Sebastes mentella in the Irminger Sea

Review of the population structure and ecology of S. mentella in the Irminger sea and adjacent waters

Geographic variation of golden redfish (Sebastes marinus) and deep-sea redfish (S. mentella) in the North Atlantic based on otolith shape analysis

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