An actively stimulating net panel and rope array inside a model cod-end to increase juvenile red seabream escapement

Kim, Yonghae; Whang, Dae-Sung

doi:10.1016/j.fishres.2010.07.005

Cited by 29 publications

(26 citation statements)

References 24 publications

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“…If the horizontal beam was responsible for directing H. castelnaui away from the trawl, this might be increased (for other species as well) by rigging novel physical or visual obstructions, such as rope arrays (similar to those described by Kim and Whang, 2010) or even air bubbles (e.g. Stewart, 1981).…”

Section: Discussionmentioning

confidence: 99%

Effects of otter boards on catches of an Australian penaeid trawl

2012

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Section: Discussionmentioning

confidence: 99%

Effects of otter boards on catches of an Australian penaeid trawl

2012

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“…Therefore, to increase the number of fish escaping from the codend they first must be encouraged to approach the netting; i.e. interfering with the optomotor swimming response (Kim and Whang, 2010). However, the existing square-mesh window and grid methods are static, passive stimuli that do not change position during short towing periods.…”

Section: E-mail Address: Yonghae@gnukrmentioning

confidence: 99%

Escape response of juvenile fish in a shaking codend determined from tank experiments

Kim¹

2015

Fisheries Research

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“…found that a black tunnel increased the proportion of haddock and whiting (Merlangius merlangus) escaping through a square mesh panel positioned 5-7 m in front of the cod line. Kim and Whang (2010) reported that introducing physical contact stimuli reduced the retention rate of juvenile red sea bream (Pagrus major) in the cod end. In a more recent study, Herrmann et al (2014) showed how stimulating devices can increase the escape of cod through a square mesh panel.…”

Section: Introductionmentioning

confidence: 99%

Improving release efficiency of cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) in the Barents Sea demersal trawl fishery by stimulating escape behaviour

Grimaldo

Sistiaga

Herrmann

et al. 2018

Can. J. Fish. Aquat. Sci.

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Abstract:We tested the ability of stimulators to improve the release efficiency of cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) through the meshes of a square mesh section installed in a trawl. The section was tested in three different configurations: without any stimulation device, with a mechanical stimulation device, and with LED light stimulation devices. We analysed and compared the behaviour of cod and haddock in all three configurations based on release results and underwater recordings. Parallel to the fishing trials, we carried out fall-through tests to determine the upper physical size limits for cod and haddock to be able to escape through the square meshes in the section. This enabled us to infer whether lack of release efficiency was due to fish behaviour or release potential of the square meshes in the section. The results showed that the escape behaviour of haddock can be triggered by mechanical stimulation. In contrast, cod did not react significantly to the presence of mechanical stimulators. LED light stimulation had some effect on the behaviour of haddock, but not on cod.Résumé : Nous avons vérifié la capacité de stimulateurs d'améliorer l'efficacité de la libération de morues (Gadus morhua) et d'aiglefins (Melanogrammus aeglefinus) par les mailles d'une section de mailles carrées installée dans un chalut. La section a été mise à l'essai selon trois configurations différentes, soit sans aucun instrument de stimulation, avec un instrument de stimulation mécanique et avec des instruments de stimulation à lumière DEL. Nous avons analysé et comparé le comportement des morues et des aiglefins dans les trois configurations à la lumière des résultats de libération et d'enregistrements sous l'eau. Parallèlement aux essais de pêche, nous avons mené des essais de passage par gravité afin de déterminer les limites supérieures des tailles auxquelles les morues et aiglefins peuvent s'évader par les mailles carrées dans la section. Cela nous a permis d'établir si l'absence d'une libération efficace était due au comportement des poissons ou au potentiel de libération des mailles carrées dans la section. Les résultats montrent que le comportement d'évasion des aiglefins peut être déclenché par une stimulation mécanique. Les morues, au contraire, n'ont pas présenté de réaction significative à la présence de stimulateurs mécaniques. La stimulation à la lumière DEL a eu un certain effet sur le comportement des aiglefins, mais pas sur celui des morues. [Traduit par la Rédaction]

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An actively stimulating net panel and rope array inside a model cod-end to increase juvenile red seabream escapement

Cited by 29 publications

References 24 publications

Effects of otter boards on catches of an Australian penaeid trawl

Effects of otter boards on catches of an Australian penaeid trawl

Escape response of juvenile fish in a shaking codend determined from tank experiments

Improving release efficiency of cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) in the Barents Sea demersal trawl fishery by stimulating escape behaviour

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