Different bottom trawl fisheries have a differential impact on the status of the North Sea seafloor habitats
| Autor: | Rijnsdorp, A D, Hiddink, J G, Van Denderen, P D, Hintzen, N T, Eigaard, O R, Valanko, S, Bastardie, F, Bolam, S G, Boulcott, P, Egekvist, J, Garcia, C, Van Hoey, G, Jonsson, P, Laffargue, Pascal, Nielsen, J R, Piet, G J, Sköld, M, Van Kooten, T, Degraer, Steven |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Trawling impact Beam trawl Population Fishing Footprint Otter trawl Aquatic Science Oceanography 010603 evolutionary biology 01 natural sciences Otter Method comparison Onderz. Form. D Demersal fish Aquaculture and Fisheries Recovery biology.animal 14. Life underwater education Ecology Evolution Behavior and Systematics education.field_of_study Biomass (ecology) Dredge Ecology biology Aquacultuur en Visserij Trawling 010604 marine biology & hydrobiology Seine biology.organism_classification Bottom trawling Fishery Soft sediment Benthic zone WIAS Environmental science Seafloor habitats |
| Zdroj: | ICES Journal of Marine Science 77 (2020) 5 ICES Journal of Marine Science, 77(5), 1772-1786 Ices Journal Of Marine Science (1054-3139) (Oxford University Press (OUP)), 2020-09, Vol. 77, N. 5, P. 1772-1786 |
| ISSN: | 1095-9289 1054-3139 |
| DOI: | 10.1093/icesjms/fsaa050 |
| Popis: | Fisheries using bottom trawls are the most widespread source of anthropogenic physical disturbance to seafloor habitats. To mitigate such disturbances, the development of fisheries-, conservation-, and ecosystem-based management strategies requires the assessment of the impact of bottom trawling on the state of benthic biota. We explore a quantitative and mechanistic framework to assess trawling impact. Pressure and impact indicators that provide a continuous pressure–response curve are estimated at a spatial resolution of 1 × 1 min latitude and longitude (∼2 km2) using three methods: L1 estimates the proportion of the community with a life span exceeding the time interval between trawling events; L2 estimates the decrease in median longevity in response to trawling; and population dynamic (PD) estimates the decrease in biomass in response to trawling and the recovery time. Although impact scores are correlated, PD has the best performance over a broad range of trawling intensities. Using the framework in a trawling impact assessment of ten métiers in the North Sea shows that muddy habitats are impacted the most and coarse habitats are impacted the least. Otter trawling for crustaceans has the highest impact, followed by otter trawling for demersal fish and beam trawling for flatfish and flyshooting. Beam trawling for brown shrimps, otter trawling for industrial fish, and dredging for molluscs have the lowest impact. Trawling is highly aggregated in core fishing grounds where the status of the seafloor is low but the catch per unit of effort (CPUE) per unit of impact is high, in contrast to peripheral grounds, where CPUE per unit of impact is low. |
| Databáze: | OpenAIRE |
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