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Strong site fidelity, residency and local behaviour of Atlantic cod (Gadus morhua) at two types of artificial reefs in an offshore wind farm
Berges, B.; van der Knaap, I.; Van Keeken, O.A.; Reubens, J.; Winter, H.V. (2024). Strong site fidelity, residency and local behaviour of Atlantic cod (Gadus morhua) at two types of artificial reefs in an offshore wind farm. Royal Society Open Science 11(7): 240339. https://dx.doi.org/10.1098/rsos.240339
In: Royal Society Open Science. The Royal Society: London. ISSN 2054-5703; e-ISSN 2054-5703
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| Trefwoorden |
Structures > Hydraulic structures > Offshore structures > Artificial reefs
Gadus morhua Linnaeus, 1758 [WoRMS]
Marien/Kust |
| Author keywords |
animal telemetry, offshore wind farm, artificial reefs |
| Auteurs | | Top |
- Berges, B.
- van der Knaap, I.
- Van Keeken, O.A.
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| Abstract |
Globally, biogenic temperate reefs are among the most threatened habitats. In the North Sea in particular, large shellfish reefs were lost owing to fishing activities in the 1900s. The impact of offshore wind farms (OWFs) on marine wildlife is extensive, and it offers the possibility to reintroduce new hard substrate habitats that are protected from fisheries at a large scale. In addition to the submerged structures of OWFs, marine hard substrate habitat can be further enhanced by providing extra artificial reefs. In an operational OWF along the Dutch coast, four artificial reefs (two with a scour bed and two without) were deployed in the vicinity of a wind turbine. Acoustic telemetry was used to monitor the fine-scale movement of 64 Atlantic cod (Gadus morhua). The monitoring ran from July 2021 to January 2023. Detailed information on behaviour, area utilization and attraction to the structures was determined. Results showed strong attraction (high site fidelity and residency) to the artificial reef, with no significant difference between the two tested types of reefs, and only a few individuals staying over winter. Cod spent a large proportion of their time hiding in the artificial reefs, suggesting that adding pipes for shelter has a beneficiary effect. |
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