Swimming performance of juvenile white sturgeon (Acipenser transmontanus): training and the probability of entrainment due to dredging
Abstract
White sturgeon, Acipenser transmontanus (Richardson), are at risk of entrainment from dredging, with young-of-the-year fish at greatest risk. To evaluate this entrainment risk, swimming performance trials were conducted in a laboratory swim tunnel with hatchery-reared juvenile white sturgeon with varying experience levels including: naïve (only tested once), tested (re-tested after being kept in no flow) and trained (re-tested after kept in flow for nearly three weeks). Individuals of various sizes (80–100 mm TL) and all experience levels were strongly rheotactic (> 80%), but endurance was highly variable among fish. Small juveniles [< 82 mm total length (TL)] had lower escape speeds (< 40 cm s−1) than medium (82–92 mm TL) and large (> 93 mm TL) naïve fish (42–45 cm s−1), all of which had lower escape speeds than trained fish (72 cm s−1). Behavior was also highly variable among fish. Overall, benthic station-holding behaviors were least frequent in small fish, intermediate in medium and large fish, and most frequent in trained large fish. Probability of entrainment of juvenile white sturgeon can be reduced by maintaining dredge head flow fields at less than 45 cm s−1 for wild-spawned fish or by rearing hatchery fish to > 93 mm TL and exposing the fish to moderate flow velocities (10–12 cm s−1) prior to their release.
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Sturgeon can potentially be entrained if individuals cannot exhibit the capacity to swim out of the dredging machinery's suction field.
“sturgeon can be potentially entrained if individuals cannot exhibit the capacity to swim out of the dredging”
From Assessing shortnose sturgeon response to estuarine dredging in the Savannah River using a before-after control-impact (BACI) approach (2026) · cites this paper as Boysen and Hoover 2009
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- Authors
- Boysen, K. A., & Hoover, J. J.
- Affiliations
- United States Army (US)
- Corresponding author
- Boysen, K. A.
- Venue
- Journal of Applied Ichthyology
- Publisher
- Wiley
- Published
- 2009-10
- Volume
- 25
- Pages
- 54-59
- ISSN
- 0175-8659 (ISSN-L)
- 1439-0426
- OpenAlex
- W2082692971
- Semantic Scholar
- 9c7e388c7be62cb1f23f3bf47ff6cc677f158300
- Cited by
- 31
- References
- 17
- Citations by year
- 2026: 3 · 2025: 3 · 2024: 1 · 2022: 1 · 2021: 1 · 2020: 3 · 2019: 2 · 2018: 1 · 2017: 3 · 2016: 1 · 2015: 2 · 2014: 5 · 2013: 1 · 2012: 1
- FWCI
- 1.19
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Applied Ichthyology (publishedVersion)
- Topics
- Physical Sciences › Environmental Science › Nature and Landscape Conservation › Fish Ecology and Management Studies
- Physical Sciences › Environmental Science › Global and Planetary Change › Marine and fisheries research
- Physical Sciences › Environmental Science › Nature and Landscape Conservation › Ichthyology and Marine Biology
- Keywords
- white sturgeon, Acipenser transmontanus, juvenile fish, swimming performance, dredging, rheotaxis, escape velocity, endurance, flow velocity, hatchery rearing
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