Survival of discarded plaice ( Pleuronectes platessa ) from Norway lobster ( Nephrops norvegicus ) otter‐trawl fishery
| Autor: | Peter Vilhelm Skov, Marc Eskelund, Caroline Methling, Niels Madsen |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
bycatch Aquatic Science 01 natural sciences Otter reflex action mortality predictor landing obligation discard survival vitality assessment Nephrops norvegicus biology.animal media_common.cataloged_instance injury assessment European union media_common Pleuronectes RAMP biology business.industry 010604 marine biology & hydrobiology 04 agricultural and veterinary sciences Nephrops biology.organism_classification Bycatch Fishery Fishing industry discard ban 040102 fisheries 0401 agriculture forestry and fisheries Seabird business |
| Zdroj: | Eskelund, M, Methling, C, Skov, P V & Madsen, N 2019, ' Survival of discarded plaice ( Pleuronectes platessa ) from Norway lobster ( Nephrops norvegicus ) otter-trawl fishery ', Journal of Applied Ichthyology, vol. 35, no. 3, pp. 645-654 . https://doi.org/10.1111/jai.13888 |
| ISSN: | 1439-0426 0175-8659 |
| DOI: | 10.1111/jai.13888 |
| Popis: | The introduction of landing obligations in the European Union common fisheries policy, has increased the focus on discard survival. Since species with scientifically proven high survival rates may be exempted from the landing obligations, the economic significance for the fishing industry is large. Landing obligations include individuals below the minimum conservation reference size (MCRS), which are not allowed to be sold for human consumption. The Norway lobster (Nephrops norvegicus) fishery is a high value fishery, but with a substantial amount of bycatch of plaice (Pleuronectes platessa) below the MCRS. In the present study, observations were made on the short‐term survival of plaice at or below the MCRS, discarded from a small otter board trawler targeting Nephrops in Skagerrak (ICES 3a). The average short‐term survival of plaice was 15% at haul level, ranging from 0% to 39%, after 10 days of captive observation. Survival significantly decreased with time on deck and the retention of debris in the codend (p < 0.0001), while survival was not correlated to size. Vitality assessments, using a combined reflex impairment and injury score, were tested as predictor of survival and were significantly associated to survival (p < 0.0001) both for individual fish and when grouped by hauls. Seabird predation behaviour was assessed and it was estimated that seabirds predated or pursued 85% of discarded plaice below the MCRS. |
| Databáze: | OpenAIRE |
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