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

Autor:	Ludvig Ahm Krag, Niels Madsen, Karl-Johan Stæhr, Bo Lundgren, Rikke Frandsen, Bent Herrmann
Rok vydání:	2009
Předmět:	Fishery biology Size selectivity Sea trial Gadus Aquatic Science Gadidae Laboratory experiment Atlantic cod biology.organism_classification Biological system
Zdroj:	Fisheries Research. 97:59-71
ISSN:	0165-7836
DOI:	10.1016/j.fishres.2009.01.002
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6f8ef08589e11f5f3f1d9ba39b6bd8d5 https://doi.org/10.1016/j.fishres.2009.01.002 Zobrazit plný text záznamu Full Text from ScienceDirect