Stocking impact and temporal stability of genetic composition in a brackish northern pike population (Esox lucius L.), assessed using microsatellite DNA analysis of historical and contemporary samples

Larsen, Peter; Hansen, Michael Møller; Nielsen, Einar Eg; Jensen, Lasse Fast; Loeschcke, Volker

doi:10.1038/sj.hdy.6800671

Cited by 47 publications

(71 citation statements)

References 41 publications

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“…This is contrary to what has been suggested earlier [11]. Further, studies indicate that North American northern pike populations have less genetic diversity and structure than the European populations [8,[12][13][14][15][16][17][18][19]. Lack of genetic diversity and structure are signs often associated with recently colonized regions, while more variability and genetic structuring are seen in populations that have been existing for longer periods of time [20].…”

Section: Introductioncontrasting

confidence: 54%

Circumpolar phylogeography of the northern pike (Esox lucius) and its relationship to the Amur pike (E. reichertii)

et al. 2014

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Background: Freshwater fishes of the genus Esox are found throughout the Holarctic region. The northern pike (E. lucius) has a circumpolar distribution whereas the assumed sister species the Amur pike (E. reichertii) is only found in the Amur region. The genetic structure and post-glacial dispersal of these species are not well known. Here, we use sequence variation at two mitochondrial DNA regions (cytb and D-loop) to investigate the phylogeography, infer location of glacial refugia and investigate the time of divergence and potential demographic expansion of the various clades detected. Results: The two species did not share haplotypes implying long-term isolation with no gene flow, and divergence of the taxa were estimated at 4.55 Myr. The northern pike mtDNA haplotypes revealed three main lineages. One of the northern pike mtDNA lineages was found throughout the entire Holarctic region suggesting transcontinental dispersal from a single refugium. The three lineages exhibited a star phylogeny, indicating population expansion following isolation in separate glacial refugia. Estimated time of divergence of these lineages was 0.18 -0.26 Myr.Conclusions: The precise location of the glacial refugia is uncertain, but our data suggests an Asian origin. The expansion of the circumpolar lineage is estimated to be around the end of the second glacial, implying that the current distribution is due to a recent recolonization from an east-Asian refugium. All three northern pike mtDNA lineages occurred sympatrically in Europe, possibly due to secondary contact. Two of the lineages probably originated from different European refugia, one in the Danube-region and one in Western Europe, the latter seems to be the primary source for recolonization of northern Europe.

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Section: Introductioncontrasting

confidence: 54%

Circumpolar phylogeography of the northern pike (Esox lucius) and its relationship to the Amur pike (E. reichertii)

et al. 2014

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“…The present study gave no indications of whether the spawning resulted in viable eggs, larvae and juveniles. However, the genetic analyses reported here and in Larsen et al (2005) strongly suggest that pike in the lagoon were self-sustaining, i.e. that successful recruitment occurs at a regular level.…”

Section: Discussionmentioning

confidence: 82%

“…Previously, the lagoon was stocked annually with pike fry from genetically differentiated non-native freshwater strains (Larsen et al, 2005). Between 1993 and 2006 in total 550,000 fry were stocked (Jacobsen et al, 2008).…”

Section: Molecular Analysesmentioning

confidence: 99%

“…before stocking) and in May 2007 (i.e. representing the spawning population after stocking had ceased), as well as samples from the three freshwater populations that had been used as broodstock (see Larsen et al, 2005), were used. Genetic differentiation among pairwise samples was estimated using Weir & Cockerham's (1984) Theta, and statistical significance was estimated using Fisher's exact tests, following Raymond & Rousset (1995).…”

Section: Molecular Analysesmentioning

confidence: 99%

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Pike (Esox lucius L.) on the edge: consistent individual movement patterns in transitional waters of the western Baltic

et al. 2016

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Pike in the western Baltic Sea live on the edge of their salinity tolerance. Under physiologically challenging conditions, organism may respond by moving to environmentally more benign areas during critical periods, such as during spawning. We hypothesised that pike in a brackish lagoon (8-10 ppt salinity) would perform spawning-and feeding-related movements between areas with different salinity regimes. Twenty-two pike were caught prior to spawning, tagged with acoustic transmitters, and their movements were tracked for 18 months. Pike showed two main patterns of movements that were consistent within individuals across two years. Whereas some individuals stayed in the lagoon year-round, most pike left the lagoon for longer periods after spawning and returned to the lagoon prior to following year's spawning season. We found no evidence that probability of moving out of the lagoon co-varied with either length or condition factor. Despite the fact that the lagoon's salinity is close to the reported upper limit for pike egg development, results indicated that all pike spawned in the lagoon. Correspondingly, genetic data showed that all fish belonged to the same reproductive population unit. Movement patterns thus appear to reflect individual variation in home-range and/or resource optimisation following ideal free principles.

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“…Active stock management is generally in response to declines in (wild) fish stocks, which can be related to recreational fishing or its management practices (Arlinghaus et al, 2002), as well as a symptom of a wide range of other activities that damage aquatic ecosystems (Cowx et al, 2010;Craig, 2016). Structural and functional changes in fish stocks and aquatic ecosystems can arise due to recreational fishing pressures (Lewin et al, 2006;Johnston et al, 2013;Post, 2013) and stocking itself can have unintended impacts (Lorenzen, 2005(Lorenzen, , 2008Larsen et al, 2005;Støttrup and Sparrevohn, 2007).…”

Section: Introductionmentioning

confidence: 99%

Pike (Esox lucius) stock management in designated brown trout (Salmo trutta) fisheries: Anglers’ preferences

Curtis

2018

Fisheries Research

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Standard-Nutzungsbedingungen:Die Dokumente auf EconStor dürfen zu eigenen wissenschaftlichen Zwecken und zum Privatgebrauch gespeichert und kopiert werden.Sie dürfen die Dokumente nicht für öffentliche oder kommerzielle Zwecke vervielfältigen, öffentlich ausstellen, öffentlich zugänglich machen, vertreiben oder anderweitig nutzen.Sofern die Verfasser die Dokumente unter Open-Content-Lizenzen (insbesondere CC-Lizenzen) zur Verfügung gestellt haben sollten, gelten abweichend von diesen Nutzungsbedingungen die in der dort genannten Lizenz gewährten Nutzungsrechte. Pike (Esox lucius) stock management in designated brown trout (Salmo trutta) fisheries: Anglers' preferences John Curtis* Abstract: This paper examines anglers' preferences for active stock management of pike populations within designated wild brown trout fisheries in Ireland. While the policy of pike control has a long history, it is not without controversy and conflict. As the objective of pike control is the protection of trout stocks, a superficial view might be that trout anglers favour and pike anglers oppose such management intervention. Pike and trout anglers do not have homogeneous preferences; in fact, a substantial minority of pike anglers also fish for trout and vice versa. The current paper is the first to examine Irish pike and trout anglers' preferences over fishery attributes, including pike stock control methods. Preference data was elicited by means of choice experiments for pike and trout anglers and a latent class site choice model is used to estimate anglers' utility functions. Not surprisingly model results show that pike anglers do not support pike stock control and almost universally would choose fishing sites where there are no pike stock controls, all else equal. We find that the majority of trout anglers, 61%, are negatively disposed towards pike stock control, and all else equal, are more likely to choose fishing sites where pike stocks are not actively managed. A substantial minority of trout anglers (i.e. 39%) could be considered advocates of pike control, with about one-third of these being more extreme in their preferences, with site choice probabilities of such anglers being largely determined by the pike control management option. Terms of use: Documents in

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Stocking impact and temporal stability of genetic composition in a brackish northern pike population (Esox lucius L.), assessed using microsatellite DNA analysis of historical and contemporary samples

Cited by 47 publications

References 41 publications

Circumpolar phylogeography of the northern pike (Esox lucius) and its relationship to the Amur pike (E. reichertii)

Circumpolar phylogeography of the northern pike (Esox lucius) and its relationship to the Amur pike (E. reichertii)

Pike (Esox lucius L.) on the edge: consistent individual movement patterns in transitional waters of the western Baltic

Pike (Esox lucius) stock management in designated brown trout (Salmo trutta) fisheries: Anglers’ preferences

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