Relationships between individual movement, trophic position and growth of juvenile pike (<i>Esox lucius)</i>

Nyqvist, Marina J.; Gozlan, Rodolphe E.; Britton, J. Robert

doi:10.1111/eff.12355

Cited by 12 publications

(13 citation statements)

References 69 publications

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“…However, eating other fish provides an ideal nutritional balance (Schindler & Eby, 1997), and the benefits of this ontogenetic diet shift for individual growth were evident in our results as well as previous studies of other species (e.g., Nyqvist et al, 2017;Post, 2003 After factoring out differences in isotopic baselines, our analyses show that YOY pike receive a significant boost in growth from feeding upon other fish. Our stomach content analyses revealed that YOY pike were capable of eating an assortment of both terrestrial and aquatic animals from multiple trophic levels.…”

Section: Discussionsupporting

confidence: 85%

Growth and recruitment dynamics of young‐of‐year northern pike: Implications for habitat conservation and management

Oele

Gaeta

Rypel

et al. 2018

Ecology of Freshwater Fish

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Maximising growth during the months after hatching is critical for fishes to surpass predator gape limits, make ontogenetic shifts in diet and increase overwinter survival. Constraints on growth during early life stages can have population and community-level implications, yet are rarely addressed by habitat restoration or fishery management efforts. To assess environmental controls on larval growth rates, we sampled adult and young-of-year (YOY) northern pike (Esox lucius) emigrating from spawning grounds in six tributaries of Lake Michigan. We found that YOY growth rates differed significantly among natal streams, in parallel with variation in hatch date and water temperatures. Within each stream, individual growth rates were positively associated with trophic position, as measured by nitrogen isotope enrichment and gut contents. Earlier hatching individuals also grew faster, but the strength of this relationship varied with warming water temperatures (i.e., 21-27°C). Ageing of adult spawners indicated no differences among streams in average growth rates later in life. Our findings suggest that restoration efforts should replicate ecological conditions found in habitats producing large numbers of fast-growing YOY. Key habitat attributes include adequate water level throughout the spring spawning season, and stable, warm water temperature conditions. Providing these environments during early life history could enhance the robustness of northern pike populations by boosting fitness from hatching to emigration to adult habitats.

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Section: Discussionsupporting

confidence: 85%

Growth and recruitment dynamics of young‐of‐year northern pike: Implications for habitat conservation and management

Oele

Gaeta

Rypel

et al. 2018

Ecology of Freshwater Fish

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“…Again, all captured fish were checked for a PIT tag, measured and a fin clip taken, and then returned. For all recaptured tagged fish (ditches and main river), their length increment was determined and converted to specific growth rate (SGR) that expressed the length change over time:

SGR = [\ln (L_{f}) - \ln (L_{i})] \times 100 / t .

where L i and L f were the initial and final fork lengths (mm) of the individual, and t was the number of days between capture and recapture (Nyqvist et al, ).…”

Section: Methodsmentioning

confidence: 99%

“…Juvenile E. lucius were sampled in two side channels (hereafter referred to as "ditches") of the River Frome in Southern England (50.6798°N, −2.1817°W) ( Figure 1; Masters et al, 2002;Nyqvist, Cucherousset, Gozlan, & Britton, 2017). The ditches were generally ≤5 m in width and ≤1 m in depth, and adult E. lucius were observed spawning there in spring.…”

Section: Sampling and Data Collectionmentioning

confidence: 99%

“…where L i and L f were the initial and final fork lengths (mm) of the individual, and t was the number of days between capture and recapture (Nyqvist et al, 2017).…”

Section: Sampling and Data Collectionmentioning

confidence: 99%

“…Left: location of the study area in the United Kingdom. Right: overview of the study sites showing the Rushton and Railway Ditches, the ditches where the pike were sampled, plus other side channels and the main river channel (taken from Nyqvist et al, )…”

Section: Introductionmentioning

confidence: 99%

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Dispersal strategies of juvenile pike (Esox luciusL.): Influences and consequences for body size, somatic growth and trophic position

Nyqvist

Gozlan

Beaumont

et al. 2019

Ecology of Freshwater Fish

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Individual variability in dispersal strategies, where some individuals disperse and others remain resident, is a common phenomenon across many species. Despite its important ecological consequences, the mechanisms and individual consequences of dispersal remain poorly understood. Here, riverine Northern pike (Esox lucius) juveniles (age 0+ (young‐of‐the‐year) and 1+ years) were used to investigate the influence of body size and trophic position (at capture) on the dispersal from off‐channel natal habitats and the subsequent consequences for body sizes, specific growth rate and trophic position (at recapture). Individuals that dispersed into the river (“dispersers”) were not significantly different in body size than those remaining on nursery grounds (“stayers”). For trophic position, 0+ dispersers were of significantly lower trophic position than stayers, but with this not apparent in the 1+ fish. Following dispersal into the river, the dispersers grew significantly faster than stayers and, on recapture, were significantly larger, but with no significant differences in their final trophic positions. Early dispersal into the river was, therefore, not associated with early dietary shifts to piscivory and the attainment of larger body sizes of individuals whilst in their natal habitats, contrary to prediction. These results suggest that despite an increasing risk of mortality for individuals dispersing early from natal areas, there are long‐term benefits via elevated growth rates and, potentially, higher fitness. Such early dispersal behaviour could be driven by early competitive displacement.

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Individual variability in the movement ecology of Northern pike Esox lucius in a highly connected wetland system

Cittadino,

Tarkan,

Aksu

et al. 2024

Aquat Sci

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Maintaining hydrological connectivity is important for sustaining freshwater fish populations as the high habitat connectivity supports large-scale fish movements, enabling individuals to express their natural behaviours and spatial ecology. Northern pike Esox lucius is a freshwater apex predator that requires access to a wide range of functional habitats across its lifecycle, including spatially discrete foraging and spawning areas. Here, pike movement ecology was assessed using acoustic telemetry and stable isotope analysis in the River Bure wetland system, eastern England, comprising of the Bure mainstem, the River Ant and Thurne tributaries, plus laterally connected lentic habitats, and a system of dykes and ditches. Of 44 tagged pike, 30 were tracked for over 100 days, with the majority of detections being in the laterally connected lentic habitats and dykes and ditches, but with similar numbers of pike detected across all macrohabitats. The movement metrics of these pike indicated high individual variability, with total ranges to over 26 km, total movements to over 1182 km and mean daily movements to over 2.9 km. Pike in the Thurne tributary were more vagile than those in the Ant and Bure, and with larger Thurne pike also having relatively high proportions of large-bodied and highly vagile common bream Abramis brama in their diet, suggesting the pike movements were potentially related to bream movements. These results indicate the high individual variability in pike movements, which was facilitated here by their access to a wide range of connected macrohabitats due to high hydrological connectivity.

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Relationships between individual movement, trophic position and growth of juvenile pike (Esox lucius)

Cited by 12 publications

References 69 publications

Growth and recruitment dynamics of young‐of‐year northern pike: Implications for habitat conservation and management

Growth and recruitment dynamics of young‐of‐year northern pike: Implications for habitat conservation and management

Dispersal strategies of juvenile pike (Esox luciusL.): Influences and consequences for body size, somatic growth and trophic position

Individual variability in the movement ecology of Northern pike Esox lucius in a highly connected wetland system

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