Reproductive Characteristics Differ in Two Invasive Populations of Blue Catfish

Nepal, Vaskar; Fabrizio, Mary C.

doi:10.1002/nafm.10611

Cited by 6 publications

(3 citation statements)

References 55 publications

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“…Catfish have garnered substantial attention as invasive species, with researchers reporting expanded ranges that result in negative impacts or differing dynamic rate functions and reproductive characteristics for catfishes outside their historical ranges. This pattern in nonnative catfish populations is seen with Blue Catfish I. furcatus (Fabrizio et al 2021;Hilling et al 2021;Nepal and Fabrizio 2021; all this special issue), bullheads Ameiurus spp. (Barabe 2021;Sikora et al 2021; both this special issue), Channel Catfish I. punctatus (Pennock et al 2018;Hedden et al 2021, this special issue), and Flathead Catfish Pylodictis olivaris (Hedden et al 2016;Massie et al 2018;Schmitt et al 2019;Smith et al 2021, this special issue), which was summarized by Montague and Shoup (2021, this special issue).…”

Section: Ecology and Conservationmentioning

confidence: 81%

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Catfish 2020, A Clear Vision of the Future

Porath

Kwak

Neely

et al. 2021

N American J Fish Manag

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The Third International Catfish Symposium was held in Little Rock, Arkansas, in 2020 and provided another milestone to gauge advances in knowledge related to conservation and management of these valuable fishes. Attendees from 29 states and 4 countries gathered to communicate research and information on the conservation, ecology, and management of the world’s catfishes. During 3 d of technical sessions and workshops, 74 oral presentations and 17 posters were shared with 198 attending fisheries professionals. Plenary and oral presentations were recorded and are available online (https://www.youtube.com/channel/UCHNt7ZV05DLWoe4qJO798Pw/videos), aligning with the symposium theme of “Communicating Catfish Science.” Technical sessions explored current research and management issues that included population demographics, introduced catfish populations, sampling methods, harvest management, human dimensions, conservation, habitat use and movement, biology, and aging methods. Ultimately, 38 manuscripts were peer reviewed and published as this special issue of the North American Journal of Fisheries Management. Interest in catfish science, as gauged by publications in six peer‐reviewed fisheries journals, has grown steadily since a 1910 catfish aquaculture article appeared in the Transactions of the American Fisheries Society. Biology and ecology topics became prominent in the 1970s and 1980s, while articles on techniques and fisheries management have grown steadily through 2020. Ecology, fisheries management, and techniques were the most published topics in the three international catfish symposia. Future research and management efforts will continue similar work but also seek to address the expanding role of catfish as invasive species and a better understanding of the ecology and conservation of small‐bodied native catfish. Among the greatest challenges will be adapting current tools and identifying future knowledge gaps as we experience a changing climate. This will require an enhanced understanding of transforming ecosystems and advanced adaptive management applications. The decadal occurrence of a dedicated symposium has served to summarize progress and focus future efforts to advance catfish science.

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Section: Ecology and Conservationmentioning

confidence: 81%

“…2021; Hilling et al. 2021; Nepal and Fabrizio 2021; all this special issue), bullheads Ameiurus spp. (Barabe 2021; Sikora et al.…”

Section: Summary Of Progressmentioning

confidence: 99%

Catfish 2020, A Clear Vision of the Future

Porath

Kwak

Neely

et al. 2021

N American J Fish Manag

View full text Add to dashboard Cite

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“…The number of spawners in year t ( S t ) was defined as in Equation 11, where m l was the probability of maturity for length group l (Table 1) based on a fitted logistic regression by Nepal and Fabrizio (2021).

S_{t} goodbreak= \sum_{l = 1} N_{l, t} m_{l}

…”

Section: Methodsmentioning

confidence: 99%

A size‐based stock assessment model for invasive blue catfish in a Chesapeake Bay sub‐estuary during 2001–2016

Hilling

Jiao

Fabrizio

et al. 2022

Fisheries Management Eco

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Assessing Blue Catfish population dynamics across varying introduction timelines in Georgia

Davis,

Sakaris,

Bonvechio

et al. 2024

N American J Fish Manag

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ObjectiveUnderstanding the dynamic rate functions of introduced fish populations is essential in guiding management strategies. Blue Catfish Ictalurus furcatus population dynamics have been well studied; however, there is a gap in knowledge from populations that have been introduced into novel systems.MethodsBlue Catfish were collected from the Altamaha, Ocmulgee, Oconee, and Satilla rivers in Georgia. Age estimates were obtained through otolith analysis. Multimodel growth analysis was used to describe growth patterns, and early life growth was modeled with linear regression. Instantaneous mortality of each population was estimated and compared by using a generalized linear model approach.ResultThe four introduced Blue Catfish populations exhibited rapid growth and low mortality rates during establishment; however, we found that populations with earlier introduction histories generally had slower growth rates and lower mortality. The Satilla River population is comparatively the most recently introduced population (first discovered in 2011) that exhibited the fastest growth and highest mortality.ConclusionOur results suggest that Blue Catfish in our study systems are in an intermediate stage of invasion and have not yet reached an equilibrium state. As density continues to increase in these river systems, we expect a decline in growth rates, delayed sexual maturation, and a greater observed maximum age. However, additional monitoring is needed to identify how population dynamics and reproductive characteristics vary over time.

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Reproductive Characteristics Differ in Two Invasive Populations of Blue Catfish

Cited by 6 publications

References 55 publications

Catfish 2020, A Clear Vision of the Future

Catfish 2020, A Clear Vision of the Future

A size‐based stock assessment model for invasive blue catfish in a Chesapeake Bay sub‐estuary during 2001–2016

Assessing Blue Catfish population dynamics across varying introduction timelines in Georgia

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