Codend selectivity in a commercial Danish anchor seine

Thomas Noack, Rikke Frandsen, Ludvig Ahm Krag, Bernd Mieske, Niels Madsen

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Abstract

Danish seining (or anchor seining) is a fishing technique that is gaining increasing attention because itis considered to be a fuel-efficient fishing method with low environmental impact. However, scientificdocumentation of the selectivity characteristics of Danish seines is lacking, and the gear generally isgrouped with bottom trawls and Scottish seines in fisheries management legislation. In this study, wedeveloped a codend cover to estimate the selectivity of a standard commercial Danish seine codendfor four fish species. The data for the dominant species, dab (Limanda limanda) and plaice (Pleuronectesplatessa), was best described by models that combine two or three logistic models, which indicated thatmore than one selection process was at work. Selectivity of cod (Gadus morhua) was best described by aRichard curve and selectivity of red gurnard (Chelidonichthys lucernus) by a logistic curve. The estimatedselectivity curve of dab indicated, contrary to cod and plaice, low retention of individuals below MLS.Confidence limits for larger length classes of cod and red gurnard were relatively wide. For plaice, theestimated selection factor, which is the length with 50% retention divided by mesh size, was comparableto literature values from trawl studies. The average value for cod was similar for Danish and Scottishseines, but lower for trawls. The results are discussed in the context of fisheries management with focuson the landing obligation of the new Common Fisheries Policy
Original languageEnglish
JournalFisheries Research
Volume186
Pages (from-to)283-291
ISSN0165-7836
DOIs
Publication statusPublished - 2017

Cite this

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title = "Codend selectivity in a commercial Danish anchor seine",
abstract = "Danish seining (or anchor seining) is a fishing technique that is gaining increasing attention because itis considered to be a fuel-efficient fishing method with low environmental impact. However, scientificdocumentation of the selectivity characteristics of Danish seines is lacking, and the gear generally isgrouped with bottom trawls and Scottish seines in fisheries management legislation. In this study, wedeveloped a codend cover to estimate the selectivity of a standard commercial Danish seine codendfor four fish species. The data for the dominant species, dab (Limanda limanda) and plaice (Pleuronectesplatessa), was best described by models that combine two or three logistic models, which indicated thatmore than one selection process was at work. Selectivity of cod (Gadus morhua) was best described by aRichard curve and selectivity of red gurnard (Chelidonichthys lucernus) by a logistic curve. The estimatedselectivity curve of dab indicated, contrary to cod and plaice, low retention of individuals below MLS.Confidence limits for larger length classes of cod and red gurnard were relatively wide. For plaice, theestimated selection factor, which is the length with 50{\%} retention divided by mesh size, was comparableto literature values from trawl studies. The average value for cod was similar for Danish and Scottishseines, but lower for trawls. The results are discussed in the context of fisheries management with focuson the landing obligation of the new Common Fisheries Policy",
author = "Thomas Noack and Rikke Frandsen and Krag, {Ludvig Ahm} and Bernd Mieske and Niels Madsen",
year = "2017",
doi = "10.1016/j.fishres.2016.10.006",
language = "English",
volume = "186",
pages = "283--291",
journal = "Fisheries Research",
issn = "0165-7836",
publisher = "Elsevier",

}

Codend selectivity in a commercial Danish anchor seine. / Noack, Thomas; Frandsen, Rikke; Krag, Ludvig Ahm; Mieske, Bernd; Madsen, Niels.

In: Fisheries Research, Vol. 186, 2017, p. 283-291.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Codend selectivity in a commercial Danish anchor seine

AU - Noack, Thomas

AU - Frandsen, Rikke

AU - Krag, Ludvig Ahm

AU - Mieske, Bernd

AU - Madsen, Niels

PY - 2017

Y1 - 2017

N2 - Danish seining (or anchor seining) is a fishing technique that is gaining increasing attention because itis considered to be a fuel-efficient fishing method with low environmental impact. However, scientificdocumentation of the selectivity characteristics of Danish seines is lacking, and the gear generally isgrouped with bottom trawls and Scottish seines in fisheries management legislation. In this study, wedeveloped a codend cover to estimate the selectivity of a standard commercial Danish seine codendfor four fish species. The data for the dominant species, dab (Limanda limanda) and plaice (Pleuronectesplatessa), was best described by models that combine two or three logistic models, which indicated thatmore than one selection process was at work. Selectivity of cod (Gadus morhua) was best described by aRichard curve and selectivity of red gurnard (Chelidonichthys lucernus) by a logistic curve. The estimatedselectivity curve of dab indicated, contrary to cod and plaice, low retention of individuals below MLS.Confidence limits for larger length classes of cod and red gurnard were relatively wide. For plaice, theestimated selection factor, which is the length with 50% retention divided by mesh size, was comparableto literature values from trawl studies. The average value for cod was similar for Danish and Scottishseines, but lower for trawls. The results are discussed in the context of fisheries management with focuson the landing obligation of the new Common Fisheries Policy

AB - Danish seining (or anchor seining) is a fishing technique that is gaining increasing attention because itis considered to be a fuel-efficient fishing method with low environmental impact. However, scientificdocumentation of the selectivity characteristics of Danish seines is lacking, and the gear generally isgrouped with bottom trawls and Scottish seines in fisheries management legislation. In this study, wedeveloped a codend cover to estimate the selectivity of a standard commercial Danish seine codendfor four fish species. The data for the dominant species, dab (Limanda limanda) and plaice (Pleuronectesplatessa), was best described by models that combine two or three logistic models, which indicated thatmore than one selection process was at work. Selectivity of cod (Gadus morhua) was best described by aRichard curve and selectivity of red gurnard (Chelidonichthys lucernus) by a logistic curve. The estimatedselectivity curve of dab indicated, contrary to cod and plaice, low retention of individuals below MLS.Confidence limits for larger length classes of cod and red gurnard were relatively wide. For plaice, theestimated selection factor, which is the length with 50% retention divided by mesh size, was comparableto literature values from trawl studies. The average value for cod was similar for Danish and Scottishseines, but lower for trawls. The results are discussed in the context of fisheries management with focuson the landing obligation of the new Common Fisheries Policy

U2 - 10.1016/j.fishres.2016.10.006

DO - 10.1016/j.fishres.2016.10.006

M3 - Journal article

VL - 186

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EP - 291

JO - Fisheries Research

JF - Fisheries Research

SN - 0165-7836

ER -