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Hatchery supplementation increases potential spawning stock of Rio Grande Silvery Minnow after population bottlenecks

Hatchery supplementation increases potential spawning stock of Rio Grande Silvery Minnow after... INTRODUCTIONCaptive propagation can be an important tool for conservation and recovery of endangered freshwater fishes. Implementation often involves difficult and controversial decisions that require balancing the risks associated with small population sizes and the risks associated with introducing captive‐reared individuals into wild populations to achieve a demographic boost (Anders 1998; Wood et al. 2019; Claussen and Philipp 2022). Both augmentation (intended to increase the total number of fish) and supplementation (intended to increase future recruitment; sensu Claussen and Philipp 2022) are increasingly used to combat declining freshwater fish populations. Captive propagation can be used to preserve genetic diversity (Meffe 1987; Osborne et al. 2012); provide unique natural history, behavioral, or early life history observations (Platania and Altenbach 1998; Rakes et al. 1999; Ruble et al. 2019); stave off extinction (Paragamian and Beamesderfer 2004; Katz et al. 2013); or provide individuals for reintroduction efforts without harming wild source populations (Shute et al. 2005; Lamothe et al. 2021). Recently, conservation aquaculture programs focusing on maintaining “wildness” (e.g., Osborne et al. 2020) have been implemented to balance the potential negative effects of supplementation with hatchery fish against recovery goals in the face of rapidly declining diversity (Tickner et al. 2020).The Rio Grande Silvery (RGS) Minnow Hybognathus amarus is a small‐bodied, short‐lived minnow species. Historically widespread in the http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Transactions of the American Fisheries Society Oxford University Press

Hatchery supplementation increases potential spawning stock of Rio Grande Silvery Minnow after population bottlenecks

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References (21)

Publisher
Oxford University Press
Copyright
© 2023 American Fisheries Society
ISSN
0002-8487
eISSN
1548-8659
DOI
10.1002/tafs.10398
Publisher site
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Abstract

INTRODUCTIONCaptive propagation can be an important tool for conservation and recovery of endangered freshwater fishes. Implementation often involves difficult and controversial decisions that require balancing the risks associated with small population sizes and the risks associated with introducing captive‐reared individuals into wild populations to achieve a demographic boost (Anders 1998; Wood et al. 2019; Claussen and Philipp 2022). Both augmentation (intended to increase the total number of fish) and supplementation (intended to increase future recruitment; sensu Claussen and Philipp 2022) are increasingly used to combat declining freshwater fish populations. Captive propagation can be used to preserve genetic diversity (Meffe 1987; Osborne et al. 2012); provide unique natural history, behavioral, or early life history observations (Platania and Altenbach 1998; Rakes et al. 1999; Ruble et al. 2019); stave off extinction (Paragamian and Beamesderfer 2004; Katz et al. 2013); or provide individuals for reintroduction efforts without harming wild source populations (Shute et al. 2005; Lamothe et al. 2021). Recently, conservation aquaculture programs focusing on maintaining “wildness” (e.g., Osborne et al. 2020) have been implemented to balance the potential negative effects of supplementation with hatchery fish against recovery goals in the face of rapidly declining diversity (Tickner et al. 2020).The Rio Grande Silvery (RGS) Minnow Hybognathus amarus is a small‐bodied, short‐lived minnow species. Historically widespread in the

Journal

Transactions of the American Fisheries Society – Oxford University Press

Published: Mar 1, 2023

Keywords: conservation hatchery; demographics; resilience; resistance; threatened and endangered species

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