An Unplanned Trial with Artificial Light Revealed A Yield Increase in Crustacean Trawl Fisheries

Michele Luca Geraci, Fabio Falsone, Danilo Scannella, Giacomo Sardo, Francesco Colloca, Fabio Fiorentino and Sergio Vitale
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Sergio Vitale: Institute for Biological Resources and Marine Biotechnology (IRBIM), National Research Council - CNR, Mazara del Vallo (Tp), Italy

Oceanography & Fisheries Open Access Journal, 2019, vol. 11, issue 1, 3-7

Abstract: In this preliminary study we tested the effect of using artificial lights mounted on the trawl net of a commercial trawler on the catch of deep water rose shrimp (Parapenaeus longirostris Lucas, 1846; DPS) and European hake (Merluccius merluccius Linneus, 1759; HKE) during a six-days selectivity survey carried out off the SW Sicilian coast. A total of 18 repeated nocturnal hauls were conducted being three hauls were carried out with a trawl net equipped with 20 green lights. A comparison of the Catch per Unit Effort CPUE (kg/h) of the two species obtained with and without light highlighted an increase of the gross catch rates with light as well as a significant difference between nights with and without light for the catch rates of DPS specimens smaller than the Minimum Conservation Reference Size (MCRS) and HKE specimens bigger than MCRS. Considering the overall size structure of target (DPS) and by-catch species (HKE), significant differences between hauls with and without light were recognized only for DPS. This preliminary result seems to suggest a general attractive effect of artificial lights on the gross catch.

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Date: 2019
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Persistent link: https://EconPapers.repec.org/RePEc:adp:jofoaj:v:11:y:2019:i:1:p:3-7

DOI: 10.19080/OFOAJ.2019.11.555802

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