The influence of twine tenacity, thickness and bending stiffness on codend selectivity
| Autor: | R.J. Kynoch, L. Blackadder, Ahmet Raif Eryaşar, Emilio Notti, Antonello Sala, Robert J. Fryer, Finbarr G. O’Neill |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Materials science biology 010604 marine biology & hydrobiology 04 agricultural and veterinary sciences Haddock Catch size Aquatic Science biology.organism_classification 01 natural sciences Fishery Plaice Bending stiffness 040102 fisheries 0401 agriculture forestry and fisheries Selectivity Twine tenacity Twine bending stiffness Composite material Twine thickness |
| Zdroj: | Fisheries research 176 (2016): 94–99. doi:10.1016/j.fishres.2015.12.012 info:cnr-pdr/source/autori:O'Neill, F. G.; Kynoch, R. J.; Blackadder, L.; Fryer, R. J.; Erya?ar, A. R.; Notti, E.; Sala, A./titolo:The influence of twine tenacity, thickness and bending stiffness on codend selectivity/doi:10.1016%2Fj.fishres.2015.12.012/rivista:Fisheries research/anno:2016/pagina_da:94/pagina_a:99/intervallo_pagine:94–99/volume:176 |
| ISSN: | 0165-7836 |
| DOI: | 10.1016/j.fishres.2015.12.012 |
| Popis: | We report on trials which measured the selectivity of haddock (Melanogrammus aeglefinus) and plaice (Pleuronectes platessa) in codends made from netting materials classified by the manufacturers as low, medium and high tenacity. We measured the twine bending stiffness, thickness and tenacity (as defined by Klust, 1982) of the netting materials and investigated which of these most influenced codend selection. For haddock, only twine bending stiffness affected selection, with l50 decreasing as bending stiffness increased. For plaice, none of the twine variables affected l50, but they all influenced selection range. Increasing mesh size increased the l50 of both species, whilst increasing catch size increased haddock l50 but decreased plaice l50. As bending stiffness is difficult to measure, a proxy is required that quantifies the resistance of meshes to opening and that can be reported in future selectivity studies. |
| Databáze: | OpenAIRE |
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