Blue catfish population characteristics and dispersal along a Great Plains river gradient

Dean, Quintin J.; Werner, Jacob P.; Pegg, Mark A.; Hamel, Martin J.

doi:10.1002/rra.3985

Cited by 5 publications

(1 citation statement)

References 43 publications

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“…Therefore, analyzing chemical properties of fish otoliths in relation to ambient water chemistry provides a footprint for where the fish has resided throughout its lifetime. Fish chemistry techniques have been commonly applied with applications for managing aquatic invasive species (Morissette et al 2021;Werner et al 2023), rare or endangered species (Porreca et al 2016;Hobbs et al 2019), sportfish (Laughlin et al 2016;Dean et al 2022), and commercially exploited species (Wright et al 2018;Artetxe-Arrate et al 2019).…”

Section: Introductionmentioning

confidence: 99%

A regional analysis of trace element water chemistry with applications for reconstructing environmental life history of fishes

Hamel,

Gerrin

2024

Preprint

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Trace elements and minerals can be important for physiological and biochemical functions in aquatic organisms and are also permanently retained in metabolically inert structures in fish, such as otoliths, which can be examined to reconstruct environmental history. Despite the importance of trace elements for biological function and environmental reconstruction, their distribution and dynamics in river systems is poorly understood. The objective of our study was to quantify trace element concentration data from across 14 river basins in Georgia, USA to create elemental concentration profiles and illustrate how spatial changes in water chemistry can be used to construct research hypotheses or make management decisions using results from chemical analyses on hard calcified parts of fish. Principal component analysis revealed substantial variation in water chemistry among and with river basins. Pairwise comparisons of Sr:Ca and Ba:Ca ratios were useful in quantifying specific differences among river systems within river basins. These data will be useful for establishing a baseline for long-term water chemistry monitoring and provides a framework for future fish chemistry research.

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Section: Introductionmentioning

confidence: 99%

A regional analysis of trace element water chemistry with applications for reconstructing environmental life history of fishes

Hamel,

Gerrin

2024

Preprint

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Characteristics of four Blue Catfish fisheries with implications for harvest management

Neely,

Flores,

Johnson

et al. 2024

N American J Fish Manag

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ObjectiveBlue Catfish Ictalurus furcatus populations introduced into Kansas reservoirs in the past few decades have supported fisheries during the 21st century that have rapidly gained popularity among anglers. The increased importance of these fisheries has prompted questions about the status of populations, resilience to overfishing, and appropriate harvest management strategies. The primary objectives of this study were to quantify the dynamics of four Blue Catfish populations in Kansas impoundments, identify susceptibility to angler catch and harvest, and evaluate modeled population responses to harvest regulation.MethodsWe coupled capture–recapture efforts and a randomized sample design using low‐frequency electrofishing to estimate population characteristics of the four Blue Catfish populations. We also estimated age and growth parameters from each population to characterize dynamic rate functions. Angler tag return data were summarized over a period of 1 year from each fishery to evaluate Blue Catfish susceptibility to angler catch and harvest. Finally, we consolidated these data into harvest regulation models to estimate the population response under varied harvest regimes.ResultEstimated densities of stock‐length (≥300 mm total length) Blue Catfish varied from 2.79 to 20.14 individuals/ha. Growth was variable, with individuals expected to reach quality length (≥510 mm total length) as early as age 4 and as late as age 9. The largest fish in each population were more vulnerable to angler capture, although harvest was low for all sizes of fish. Harvest regulation models indicated that populations were resilient to increased exploitation under all scenarios, with a limited risk of growth overfishing or recruitment overfishing.ConclusionBlue Catfish populations in Kansas reservoirs exhibit different dynamics but demonstrate resilience to overfishing. The largest individuals in populations are much more vulnerable to angler catch than smaller fish, but the risk of overharvest appears mitigated by angler self‐regulation.

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Patterns in spatial use and movement of Silver Carp among tributaries and main-stem rivers: insight from otolith microchemistry analysis

Werner

Dean²,

Pegg³

et al. 2022

Biol Invasions

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Blue catfish population characteristics and dispersal along a Great Plains river gradient

Cited by 5 publications

References 43 publications

A regional analysis of trace element water chemistry with applications for reconstructing environmental life history of fishes

A regional analysis of trace element water chemistry with applications for reconstructing environmental life history of fishes

Characteristics of four Blue Catfish fisheries with implications for harvest management

Patterns in spatial use and movement of Silver Carp among tributaries and main-stem rivers: insight from otolith microchemistry analysis

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