Wetlands for northern pike (Esox lucius L.) recruitment in the Baltic Sea

Nilsson, Jonas; Engstedt, Olof; Larsson, Per

doi:10.1007/s10750-013-1656-9

Cited by 53 publications

(88 citation statements)

References 21 publications

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“…These systems also offer valuable opportunities for scientific studies. The defined routes through narrow streams and fishways/outlets through which fish (adults and juveniles) pass allow for controlled quantification of migration and emigration, phenology as well as population dynamics (Larsson et al., ; Nilsson et al., ; Tibblin et al., ; Tibblin, Forsman et al., ).…”

Section: Methodsmentioning

confidence: 99%

“…Sticklebacks have consequently been favoured by predator release partly constituted by declining pike populations (Bergström et al., , ; Donadi et al., ; Sieben, Ljunggren, Bergström, & Eriksson, ). Many efforts, including fisheries regulation and habitat restoration, have been directed towards remediating the underlying causes for the decline, aid the recovery of pike and ultimately improve the coastal ecosystem (Engstedt, Nilsson, & Larsson, ; Nilsson, Engstedt, & Larsson, ). Still, the pike populations recover only very slowly, if at all (Bergström et al., ; Eriksson et al., ) (Figure b).…”

Section: Introductionmentioning

confidence: 99%

“…It has been speculated that the recovery of pike populations may be impaired by high abundances of sticklebacks (Bergström et al., ; Byström et al., ; Ljunggren et al., ), but the underlying mechanism has not been firmly established. In the Baltic Sea, anadromous pike forage in the coastal habitat and migrate to breed in streams and wetlands (Engstedt, Stenroth, Larsson, Ljunggren, & Elfman, ; Nilsson et al., ; Tibblin, Forsman, Borger, & Larsson, ). Breeding, depending on population, occurs during March to May (Larsson et al., ; Tibblin, Forsman et al., ), and the eggs hatch after a few weeks (Berggren, Nordahl, Tibblin, Larsson, & Forsman, ; Craig, ).…”

Section: Introductionmentioning

confidence: 99%

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Predator–prey role reversal may impair the recovery of declining pike populations

Nilsson

Flink

Tibblin

2019

Journal of Animal Ecology

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Many fish populations have experienced declines in recent decades due to anthropogenic disturbances, such as overfishing and habitat exploitation. Despite management actions, many populations show a limited capacity to recover. This may be attributed to reversal of predator–prey roles, yet empirical evidence to that effect remains scarce. Here, we combine field and laboratory studies to investigate the interaction between pike (Esox lucius), a large keystone top predatory fish, and the small‐bodied mesopredatory threespine stickleback (Gasterosteus aculeatus) in the Baltic Sea where pike populations have declined. Our data suggest that stickleback predation on pike larvae depletes a large proportion of the recruitment and influences the size distribution through size‐selective predation, which is corroborated by a gape‐limitation experiment and diet analysis of wild‐captured sticklebacks. The effects of stickleback predation are present across several populations and years, and our data suggest that early arrival of sticklebacks has stronger effects on juvenile pike survival. Finally, we use data on pike gape‐limitation and the size distribution of sticklebacks to illustrate the process of role reversal. These findings suggest that mesopredator behaviour can reduce recruitment of a top predator species and impair the capacity of populations to recover. This emphasizes predator–prey role reversal as an important ecological and evolutionary driver that influences the outcome of restoration and management actions.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Predator–prey role reversal may impair the recovery of declining pike populations

Nilsson

Flink

Tibblin

2019

Journal of Animal Ecology

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“…On the other hand, in many regions, the species is threatened with extinction—for example, in the coastal areas of Sweden (Nilsson et al. ), Finland (Lehtonen et al. ), and Denmark (Jacobsen et al.…”

mentioning

confidence: 99%

Effect of Preservation in Formalin and Alcohol on the Growth Rate Estimates of Larval Northern Pike

Greszkiewicz

Fey

2018

N American J Fish Manag

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Body length measurements and growth rate (GR) analysis are important steps in research on the ecology of early development stages of fish. In order to obtain accurate results, the lengths of field‐collected and preserved larvae must be corrected for shrinkage. Northern Pike Esox lucius larvae were kept in the laboratory in freshwater conditions (300‐L tank; temperature = 16°C), where they were fed six times a day ad libitum with aquaculture feed. Every 3 d over a period of 30 d, a subsample of approximately 30 larvae was collected, measured, and placed in separate vials in 96% alcohol and 4% formalin. All of the larvae (8.8–34 mm SL; n = 276) were measured again after 90 d of preservation. The shrinkage ranged from 0% to 11.6%, averaging 3.42% in alcohol (n = 134) and 3.74% in formalin (n = 139). The difference was not statistically significant. In both preservatives, the relative shrinkage (%) was higher for small fish than for large fish. The length correction for 8–34‐mm SL fish in both alcohol and formalin should be done by adding 0.7 mm to the length measured after preservation. Shrinkage did not affect fish GRs estimated based on linear regression fitted to size‐at‐age data (0.645 mm/d for unpreserved larvae and 0.650 mm/d for preserved larvae). In the opposite case, when growth was estimated as mean GR between hatching and sampling, the shrinkage effect was significant: the mean GR was 0.604 mm/d for unpreserved larvae and 0.558 mm/d for preserved larvae. The presented shrinkage correction formula allows for obtaining accurate length and GR data for larval Northern Pike that should lead to conclusions that credibly support undertaking appropriate management strategies.

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“…For example, the historical wetland drainage in coastal Northern Europe resulted in widespread loss of crucially important recruitment areas, but smaller disturbances such as dock construction and boating have also had marked effects on shallow coastal nursery habitats [12][13][14].…”

Section: Open Accessmentioning

confidence: 99%

What is the impact on fish recruitment of anthropogenic physical and structural habitat change in shallow nearshore areas in temperate systems? A systematic review protocol

et al. 2016

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Background: Shallow nearshore marine ecosystems are changing at an increasing rate due to a range of human activities such as urbanisation and commercial development. The growing numbers of constructions and other physical and structural alterations of the shoreline often take place in nursery and spawning habitats of many fish and other aquatic species. Several coastal fish populations have seen marked declines in abundance and diversity during the past two decades. A systematic review on the topic would clarify if anthropogenic physical and structural changes of near-shore areas have effects on fish recruitment and which these effects are. Methods:The review will examine how various physical and structural anthropogenic changes of nearshore fish habitats affect fish recruitment. Relevant studies include small-and large-scale field studies in marine and brackish systems or large lakes in temperate regions of the Northern and Southern hemispheres. Relevant studies may be based on comparisons between undisturbed and disturbed areas, before and after disturbance, or both. Relevant outcomes include measures of recruitment defined as abundance of juveniles of nearshore fish communities. Searches will be made for peer-reviewed and grey literature in English, Dutch, Danish, Finnish, German, Swedish and Spanish. All fish species and species groups will be considered in this review. Included relevant studies will be subject to a critical appraisal that will assess study validity. From relevant included studies, we will extract information on study characteristics, measured outcomes, exposure, comparators, effect modifiers and critical appraisal. Data synthesis will contain narrative and summary findings of each included study of sufficient quality. Meta-analysis may be possible in cases where studies report similar types of outcomes.

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Wetlands for northern pike (Esox lucius L.) recruitment in the Baltic Sea

Cited by 53 publications

References 21 publications

Predator–prey role reversal may impair the recovery of declining pike populations

Predator–prey role reversal may impair the recovery of declining pike populations

Effect of Preservation in Formalin and Alcohol on the Growth Rate Estimates of Larval Northern Pike

What is the impact on fish recruitment of anthropogenic physical and structural habitat change in shallow nearshore areas in temperate systems? A systematic review protocol

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