Atlantic cod (Gadus morhua L.) in inner and outer coastal zones of northern Norway display divergent genetic signature at non-neutral loci

Westgaard, Jon‐Ivar; Fevolden, Svein-Erik

doi:10.1016/j.fishres.2007.04.001

Cited by 74 publications

(67 citation statements)

References 56 publications

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“…Significant genetic differentiation was not detected between the populations of Bornholm and Øland, Bornholm and Kattegat, Bornholm and Coastal South, and Coastal North and North East Arctic, probably because of the extensive ongoing gene flow among these populations. The absence of significant differentiation between the populations Coastal North and North East Arctic was also reported [29], in which the spatial analysis of molecular variance revealed that the outer coastal samples (CCN) cannot be discriminated from North East Arctic by means of microsatellite markers, supporting the similarity of the two groups at the Pan I locus.…”

Section: Table 10supporting

confidence: 57%

Transferrin gene polymorphisms and population genetic studies of Atlantic cod (Gadus morhua)

Asmamaw¹

2016

J Coast Life Med

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Section: Table 10supporting

confidence: 57%

Transferrin gene polymorphisms and population genetic studies of Atlantic cod (Gadus morhua)

Asmamaw¹

2016

J Coast Life Med

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“…The use of floating and bottom-set nets in shallow water and in the littoral zone may potentially catch a wide range of fish and crustacean species, and may have undesirable negative effects on other populations. For example, the spawning stock of coastal cod Gadus morhua is structured into local fjord populations (Jorde et al 2007, Westgaard & Fevolden 2007 and has declined in recent years (Berg 2006). A moderate non-selective fishery may have a long-term effect on population growth rate of cod in fjords (Salvanes 2001).…”

Section: Discussionmentioning

confidence: 99%

Recapture of cultured salmon following a large-scale escape experiment

Skilbrei¹,

Jørgensen²

2010

Aquacult. Environ. Interact.

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A large-scale escape experiment using 1031 adult Atlantic salmon Salmo salar L. was performed in the Hardangerfjord in western Norway to study the dispersal of escaped salmon, evaluate the effect of a gill-net fishery targeting escaped salmonids and test whether surface trawling is an effective way of recapturing escaped salmon in a large fjord system. The salmon of mean weights 1.56 and 5.5 kg were released from 2 commercial fish farms in late September 2006. All fish were tagged with external tags, and 48 were also equipped with acoustic transmitters. A surface pair-trawl (50 m wide and 8 m deep) was constructed to optimize catchability and maneuverability in the fjord environment. Trawling was unsuccessful, and caught only 6 simulated escapees. Telemetry data confirmed that the fish were available along the towing tracks, and we assume that towing speed and/or trawl size may have been suboptimal with regard to avoidance by fish in the fjord environment. Gillnetting proved to be an efficient method of recapture. The total reported recapture rate (of 114 fishers) was 40%, but a significantly higher recapture rate (67%) of the more highly rewarded acoustic transmitters, and the distribution of the fish in time and space, suggest that the actual catch may have been substantially higher. Approximately 90% of the catches were taken within 40 km of the release sites over the course of 4 wk. We conclude that a significant proportion of escaped adult salmon can be recaptured if the catch effort within the fjord basin is widespread and lasts for at least 4 wk.

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“…This offers great promise for many aspects of conservation genetics (Luikart et al 2003, Kohn et al 2006, including the development of novel markers for forensic identification and the subsequent production of reference data. Increased genomic data will not 191 Endang Species Res 9: [179][180][181][182][183][184][185][186][187][188][189][190][191][192][193][194][195] only provide larger numbers of traditional genetic markers used for identification, such as neutral SNP and microsatellite markers, but also enable the discovery and application of markers associated with adaptive traits which may allow greater resolution of geographic population identification (Westgaard & Fevolden 2007). This has potential for areas such as fisheries management where migration among ancestral populations tends to prevent geographic differentiation using neutral markers (Mariani et al 2005).…”

Section: Future Developments and Challengesmentioning

confidence: 99%

Wildlife DNA forensics—bridging the gap between conservation genetics and law enforcement

Ogden¹,

Dawnay²,

McEwing³

2009

Endang. Species. Res.

176

166

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Wildlife DNA forensics is an applied field that has emerged from a synthesis of conservation genetic research and forensic genetic practice to meet the increasing need for investigative tools in wildlife law enforcement. This review describes the principal technologies and applications available to wildlife forensic geneticists, focussing on the four most common casework questions: What species is it? Where did it come from? Who did it come from? Was it captive bred? The conversion of established research tools into forensic identification systems is discussed, explaining the need for method validation at each stage of the analytical process, from sample collection to data analysis. The requirement for wildlife DNA forensic analysis to be performed under equivalent quality assurance standards to those of human forensic genetics is highlighted and approaches for the interpretation and presentation of DNA evidence are described. A perspective is provided on the potential for new genetic techniques and their future role in the increasingly complex fight to enforce the protection of endangered species. The review concludes with a number of recommendations for promoting a unified, rigorous approach to the development and application of wildlife DNA forensic techniques. KEY WORDS: Wildlife crime · Legal · Illegal trade · Poaching · CITES · Species identification · DNA profiling · Population assignment Resale or republication not permitted without written consent of the publisher Contribution to the Theme Section 'Forensic methods in conservation research' OPEN PEN ACCESS CCESSEndang Species Res 9: [179][180][181][182][183][184][185][186][187][188][189][190][191][192][193][194][195] vidual identity of a sample. The subject has developed in parallel to human forensic genetics and has benefited from the horizontal transfer of molecular and statistical techniques; however, it remains a highly specialist area with its own distinct set of challenges, situated between wildlife conservation research and applied forensic science. With the development of national and international legislation to protect everdiminishing habitat and species diversity, DNA forensics is now becoming a key investigative tool to combat wildlife crime. At the same time, the way in which DNA evidence is generated and presented in court is coming under renewed scrutiny. This review introduces the subject of wildlife DNA forensics, highlighting the potential advantages and pitfalls surrounding this emerging field, and aims to provide recommendations for promoting a unified, rigorous approach to the development and application of wildlife DNA forensic techniques. HISTORYThe use of genetic analysis to identify non-human evidence began shortly after the first DNA fingerprints were applied to human forensic investigation (Gill et al. 1985). The realization that the same technique could allow familial identification in birds (Burke & Bruford 1987) rapidly led to the use of these methods to verify captive breeding claims in cases where wild bird thef...

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Atlantic cod (Gadus morhua L.) in inner and outer coastal zones of northern Norway display divergent genetic signature at non-neutral loci

Cited by 74 publications

References 56 publications

Transferrin gene polymorphisms and population genetic studies of Atlantic cod (Gadus morhua)

Transferrin gene polymorphisms and population genetic studies of Atlantic cod (Gadus morhua)

Recapture of cultured salmon following a large-scale escape experiment

Wildlife DNA forensics—bridging the gap between conservation genetics and law enforcement

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