Discrimination among species of the genus Sebastes in the North Atlantic by random amplified polymorphic DNA

Johansen, Torild; Dahle, Geir

doi:10.1080/00364820410002695

Cited by 8 publications

(3 citation statements)

References 21 publications

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“…DNA sequences have not been indentified, random amplified polymorphic DNA (RAPD) can be used to explore the patterns of variability, because RAPD primers recognize simple nucleotide sequences that should arise frequently in any DNA (Smith, 2005). Johansen et al (1997) and Johansen and Dahle (2004) found significant differences in allele frequencies of four RAPD primers among all samples of S. mentella from the Gulf of St Lawrence, Norway, and the Irminger Sea (oceanic and deep-sea). However, RAPDs produce results that may not be repeatable and are no longer considered to be a reliable approach for testing population-structure hypotheses.…”

Section: Nuclear Dnamentioning

confidence: 99%

Population structure of beaked redfish, Sebastes mentella: evidence of divergence associated with different habitats

Cadrin¹,

Bernreuther

Daníelsdóttir

et al. 2010

ICES Journal of Marine Science

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Cadrin, S. X., Bernreuther, M., Daníelsdóttir, A. K., Hjörleifsson, E., Johansen, T., Kerr, L., Kristinsson, K., Mariani, S., Nedreaas, K., Pampoulie, C., Planque, B., Reinert, J., Saborido-Rey, F., Sigurðsson, T., and Stransky, C. 2010. Population structure of beaked redfish, Sebastes mentella: evidence of divergence associated with different habitats. – ICES Journal of Marine Science, 67: 1617–1630. Throughout their range, Sebastes spp. are adapted to a diversity of ecological niches, with overlapping spatial distributions of different species that have little or no morphological differences. Divergence of behavioural groups into depth-defined adult habitats has led to reproductive isolation, adaptive radiation, and speciation in the genus Sebastes. Recent genetic research, supported by life-history information, indicates four biological stocks of Sebastes mentella in the Irminger Sea and adjacent waters: a western stock, a deep-pelagic stock, a shallow-pelagic stock, and an Iceland slope stock. Congruent differences in fatty acids and parasites suggest that these genetically distinct populations are adapted to disparate trophic habitats in pelagic waters (shallower and deeper than the deep-scattering layer) and in demersal habitats on the continental slope. Morphology of pelagic forms is also more streamlined than demersal forms. Although genetic differences and evidence for reproductive isolation are clear, these populations appear to share common nursery habitats on the Greenland shelf. We propose a redefinition of practical management units near the Irminger Sea based on geographic proxies for biological stocks and minimizing mixed-stock catches according to the spatial patterns of the recent fishery.

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Section: Nuclear Dnamentioning

confidence: 99%

Population structure of beaked redfish, Sebastes mentella: evidence of divergence associated with different habitats

Cadrin¹,

Bernreuther

Daníelsdóttir

et al. 2010

ICES Journal of Marine Science

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“…Due to the difficulties with morphologically based determination of redfish species, genetic methods have been in the past mainly used for species discrimination (Nedreaas and Nævdal 1989, 1991; Sundt and Johansen 1998; Roques et al . 1999; Johansen and Dahle 2004). Nevertheless, some studies have also shown genetic differentiation within species mainly on large spatial scales.…”

Section: Mismatch Between Management and Biological Units In The Ne Amentioning

confidence: 99%

Genetic population structure of marine fish: mismatch between biological and fisheries management units

et al. 2009

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Introduction 362Determination of populations and management units 363 Mismatch between management and biological units in the NE Atlantic 371Fisheries management and management units in the NE Atlantic 371Population structure of demersal fish species 372Cod 372Haddock 378Other demersal roundfish species 378Plaice 379Sole 379Other flatfish species 380 AbstractAn essential prerequisite of a sustainable fisheries management is the matching of biologically relevant processes and management action. In fisheries management and assessment, fish stocks are the fundamental biological unit, but the reasoning for the operational management unit is often indistinct and mismatches between the biology and the management action frequently occur. Despite the plethora of population genetic data on marine fishes, to date little or no use is made of the information, despite the fact that the detection of genetic differentiation may indicate reproductively distinct populations. Here, we discuss key aspects of genetic population differentiation in the context of their importance for fisheries management. Furthermore, we evaluate the population structure of all 32 managed marine fish species in the north-east Atlantic and relate this structure to current management units and practice. Although a large number of studies on genetic population structure have been published in the last decades, data are still rare for most exploited species. The mismatch between genetic population structure and the current management units found for six species (Gadus morhua, Melanogrammus aeglefinus, Merlangius merlangus, Micromesistius poutassou, Merluccius merluccius and Clupea harengus), emphasizes the need for a revision of these units and questions the appropriateness of current management measures. The implementation of complex and dynamic population structures into novel and less static management procedures should be a primary task for future fisheries management approaches.

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“…Since the main focus in these works has been related to variation within species and population genetics, a protocol describing procedures and methods to use for diagnostic identification of species using DNA techniques is still lacking. It can though be mentioned that Johansen and Dahle (2004) investigated this by polymerase chain reaction (PCR)-based random amplification of polymorphic DNA (RAPD). They found that only one primer, OPA20, could be used to diagnostically distinguish among species.…”

Section: Species Identificationmentioning

confidence: 99%

Monitoring beaked redfish (Sebastes mentella) in the North Atlantic, current challenges and future prospects

Planque

Kristinsson

Astakhov

et al. 2013

Aquat. Living Resour.

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-Beaked redfish inhabits North Atlantic waters in the depth range 100-950 m, over the continental shelf, slope and the open ocean. Individuals can live demersal or pelagic, at various stages of their life cycle. The geographical distribution of the species extends to most of the Atlantic waters from Newfoundland and the Labrador basin in the west to the Barents Sea in the east. Monitoring beaked redfish is challenging because of the species wide geographical distribution and large scale migrations; deep distribution, which complicates trawling and hydroacoustic surveys; difficulties with tagging; and persistent difficulties in taxonomic identification. These challenges make it a particularly problematic species to observe with conventional research methods. We review these key challenges and provide recommendations for the coordinated observation of Sebastes mentella in the North Atlantic that would best contribute to the assessment and ecological research on this species.

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Discrimination among species of the genus Sebastes in the North Atlantic by random amplified polymorphic DNA

Cited by 8 publications

References 21 publications

Population structure of beaked redfish, Sebastes mentella: evidence of divergence associated with different habitats

Population structure of beaked redfish, Sebastes mentella: evidence of divergence associated with different habitats

Genetic population structure of marine fish: mismatch between biological and fisheries management units

Monitoring beaked redfish (Sebastes mentella) in the North Atlantic, current challenges and future prospects

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