Appraisal of a novel fishery of whelks (Buccinum undatum) in Danish waters

Vismann, Bent; Nielsen, Johan Wedel; Rønfeldt, Jacob Linnemann

doi:10.1016/j.rsma.2022.102710

Cited by 2 publications

(2 citation statements)

References 40 publications

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“…The common whelk Buccinum undatum is a neogastropod mollusk with a widespread distribution in coastal waters up to 1200 m in depth (Schäfer 1960;Óskarsson 1962;Golikov 1968). This species has a large range from Iceland to the Bay of Biscay and is found throughout the North Atlantic and waters of America and Canada from approximately 75° N to 45° S (Ager 2008) in varying spatial density up to approximately 2 individuals/m 2 (Vismann et al 2022). Whelks exhibit k-selected life history traits and reduced gene flow between populations, making them particularly vulnerable to recruitment overfishing (Valentinsson et al 1999;Wood and Jonasson 2017;Borsetti et al 2018).…”

Section: Introductionmentioning

confidence: 99%

“…This species has a large range from Iceland to the Bay of Biscay and is found throughout the North Atlantic and waters of America and Canada from approximately 75° N to 45° S (Ager 2008) in varying spatial density up to approximately 2 individuals/m 2 (Vismann et al. 2022). Whelks exhibit k ‐selected life history traits and reduced gene flow between populations, making them particularly vulnerable to recruitment overfishing (Valentinsson et al.…”

Section: Introductionmentioning

confidence: 99%

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Estimating gear selectivity and population composition of common whelks Buccinum undatum from tagging experiments and comparative gear trials

Colvin,

Phillips,

Hoenig

et al. 2024

N American J Fish Manag

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ObjectiveThe common whelk Buccinum undatum is of great commercial and ecological importance, but little information is known regarding the gear selectivity of the fishery. Understanding gear selectivity is key for the long‐term sustainability of a stock and has applications in stock assessments and fishery management.MethodsWe investigated the effect of gear (pots) on the selectivity of catch within the common whelk commercial fishery through a mark–recapture study and comparative gear trials across Wales. The size composition of the population in the water was estimated by dividing the numbers at size brought onboard by the selectivity of the pots. The selectivity of experimental pots (commercial pots that were modified to catch a wider size range) was estimated by comparing the size composition of whelks caught in the experimental gear to the estimated size composition of the population.ResultPeak selectivity of commercial pots occurred around the current minimum landing size (65 mm total shell length) for common whelks, with selectivity sloping off gradually for larger individuals and rapidly for undersized individuals. Across regions, less than 30% of the catch from baited lay‐down pots was discarded. Experimental pots were found to have a more variable but generally dome‐shaped selectivity curve similar to that of the commercial pots.ConclusionThe fishery appears to be well designed, with gear successfully targeting the legal‐sized catch, which is promising for the conservation of the stock if discards have a high survival rate. Experimental gear is ideal for stock assessment purposes, and methods developed to estimate the selectivity of the experimental pots reduce the need for further intensive mark–recapture studies as fishing gear evolves over time.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Estimating gear selectivity and population composition of common whelks Buccinum undatum from tagging experiments and comparative gear trials

Colvin,

Phillips,

Hoenig

et al. 2024

N American J Fish Manag

View full text Add to dashboard Cite

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Estimating common whelk (Buccinum undatum) abundance using baited remote underwater video (BRUV)

Garratt,

Bloor,

Coleman

et al. 2024

ICES Journal of Marine Science

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Baited static gear fisheries targeting benthic invertebrates have expanded at a global scale. While improvements have been made in the monitoring and management of these fisheries, reliable survey methods for stock assessments of many key species are lacking. In this study we examine the viability of a baited remote underwater video (BRUV) system for obtaining abundance indices for a data-limited stock (common whelk, Buccinum undatum), and compare this method to catch per unit effort (CPUE) from commercial fishing. BRUVs capable of collecting 15 hours of timelapse footage were deployed on pot strings in two distinct whelk fishing sites, with replication over a spring-neap tidal cycle. Three potential BRUV metrics—the maximum (MaxN) and mean (MeanN) abundance and time of first arrival (T1)—were calculated for each deployment, and significant linear relationships were identified between MaxN, MeanN, and CPUE across sites. Temporal variability in BRUV indices driven by tidal dynamics was minimal, although results suggest high current speeds may reduce abundance estimates, and a potential method for predicting density on the seabed using arrival rates is also demonstrated. BRUVs are a valuable tool in developing stock assessment surveys for static gear fisheries.

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Appraisal of a novel fishery of whelks (Buccinum undatum) in Danish waters

Cited by 2 publications

References 40 publications

Estimating gear selectivity and population composition of common whelks Buccinum undatum from tagging experiments and comparative gear trials

Estimating gear selectivity and population composition of common whelks Buccinum undatum from tagging experiments and comparative gear trials

Estimating common whelk (Buccinum undatum) abundance using baited remote underwater video (BRUV)

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