Prediction of selectivity from morphological conditions: Methodology and a case study on cod (Gadus morhua)

Bent Herrmann; Ludvig A. Krag; Rikke P. Frandsen; Niels Madsen; Bo Lundgren; Karl Johan Stæhr

doi:10.1016/j.fishres.2009.01.002

Prediction of selectivity from morphological conditions: Methodology and a case study on cod (Gadus morhua)

Bent Herrmann, Ludvig A. Krag^*, Rikke P. Frandsen, Niels Madsen, Bo Lundgren, Karl Johan Stæhr

^*Corresponding author for this work

Research output: Contribution to journal › Journal article › Research › peer-review

77 Citations (Scopus)

Abstract

The FISHSELECT methodology, tools, and software were developed and used to measure the morphological parameters that determine the ability of cod to penetrate different mesh types, sizes, and openings. The shape of one cross-section at the cod's head was found to explain 97.6% of the mesh penetration results obtained in a laboratory experiment. Design guides predicting the 50% retention length (L50) of different mesh types, sizes, and openings were produced and compared with results from sea trials. Results show that the morphology-based simulations can be used to explain both the within-haul and the between-haul variations previously reported from sea trials. Finally, based on the results obtained, ideas to improve the size selection of cod in towed gear are presented.

Original language	English
Journal	Fisheries Research
Volume	97
Issue number	1-2
Pages (from-to)	59-71
Number of pages	13
ISSN	0165-7836
DOIs	https://doi.org/10.1016/j.fishres.2009.01.002
Publication status	Published - 1 Apr 2009
Externally published	Yes

Keywords

Atlantic cod Gadus morhua
FISHSELECT
Mesh penetration
Morphology
Size selectivity

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abstract = "The FISHSELECT methodology, tools, and software were developed and used to measure the morphological parameters that determine the ability of cod to penetrate different mesh types, sizes, and openings. The shape of one cross-section at the cod's head was found to explain 97.6% of the mesh penetration results obtained in a laboratory experiment. Design guides predicting the 50% retention length (L50) of different mesh types, sizes, and openings were produced and compared with results from sea trials. Results show that the morphology-based simulations can be used to explain both the within-haul and the between-haul variations previously reported from sea trials. Finally, based on the results obtained, ideas to improve the size selection of cod in towed gear are presented.",

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AU - Madsen, Niels

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AU - Stæhr, Karl Johan

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AB - The FISHSELECT methodology, tools, and software were developed and used to measure the morphological parameters that determine the ability of cod to penetrate different mesh types, sizes, and openings. The shape of one cross-section at the cod's head was found to explain 97.6% of the mesh penetration results obtained in a laboratory experiment. Design guides predicting the 50% retention length (L50) of different mesh types, sizes, and openings were produced and compared with results from sea trials. Results show that the morphology-based simulations can be used to explain both the within-haul and the between-haul variations previously reported from sea trials. Finally, based on the results obtained, ideas to improve the size selection of cod in towed gear are presented.

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Prediction of selectivity from morphological conditions: Methodology and a case study on cod (Gadus morhua)

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Keywords

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