Browsing Brage IMR by Author "Keeley, Nigel B."
Now showing items 1-17 of 17
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Attraction of cod Gadus morhua from coastal spawning grounds to salmon farms
Skjæraasen, Jon Egil; Karlsen, Ørjan; Langangen, Øystein Ole Gahr; Meier, Sonnich; Dunlop, Katherine Mary; van der Meeren, Terje; Keeley, Nigel B.; Myksvoll, Mari Skuggedal; Dahle, Geir; Moland, Even; Nilsen, Rune; Elvik, Kristine Marit Schrøder; Bannister, Raymond; Olsen, Esben Moland (Peer reviewed; Journal article, 2022)Wild fish aggregate at aquaculture net-pens, but the underlying mechanisms are not fully understood. This study examined how salmon farms attract coastal Atlantic cod Gadus morhua from their inshore spawning grounds. ... -
Attraction of cod Gadus morhua from coastal spawning grounds to salmon farms
Skjæraasen, Jon Egil; Karlsen, Ørjan; Langangen, Øystein Ole Gahr; Meier, Sonnich; Dunlop, Katherine Mary; van der Meeren, Terje; Keeley, Nigel B.; Myksvoll, Mari Skuggedal; Dahle, Geir; Moland, Even; Nilsen, Rune; Elvik, Kristine Marit Schrøder; Bannister, Raymond; Olsen, Esben Moland (Peer reviewed; Journal article, 2022)Wild fish aggregate at aquaculture net-pens, but the underlying mechanisms are not fully understood. This study examined how salmon farms attract coastal Atlantic cod Gadus morhua from their inshore spawning grounds. ... -
Beyond taxonomy: Validating functional inference approaches in the context of fish-farm impact assessments
Laroche, Olivier; Pochon, Xavier; Wood, Susanna A.; Keeley, Nigel B. (Peer reviewed; Journal article, 2021)Characterization of microbial assemblages via environmental DNA metabarcoding is increasingly being used in routine monitoring programs due to its sensitivity and cost-effectiveness. Several programs have recently been ... -
Bimodal distribution of seafloor microbiota diversity and function are associated with marine aquaculture
Pettersen, Ragnhild; Ormaasen, Ida; Angell, Inga Leena; Keeley, Nigel B.; Lindseth, A.; Snipen, Lars-Gustav; Rudi, Knut (Peer reviewed; Journal article, 2022)The aim of the current work was to investigate the impact of marine aquaculture on seafloor biogeochemistry and diversity from pristine environments in the northern part of Norway. Our analytical approach included analyses ... -
Comparing sediment DNA extraction methods for assessing organic enrichment associated with marine aquaculture
Pearman, John K.; Keeley, Nigel B.; Wood, Susanna A.; Laroche, Olivier; Zaiko, Anastasija; Thomson-Laing, Georgia; Biessy, Laura; Atalah, Javier; Pochon, Xavier (Peer reviewed; Journal article, 2020)Marine sediments contain a high diversity of micro- and macro-organisms which are important in the functioning of biogeochemical cycles. Traditionally, anthropogenic perturbation has been investigated by identifying ... -
Ecological interactions between farmed Atlantic salmon and wild Atlantic cod populations in Norway: A review of risk sources and knowledge gaps
Bøhn, Thomas; Strøm, John Frederik; Sanchez-Jerez, Pablo; Keeley, Nigel B.; Johansen, Torild; Gjelland, Karl Øystein; Sandlund, Nina; Sæther, Bjørn Steinar; Sætra, Ingeborg Mathisen; Olsen, Esben Moland; Skjæraasen, Jon Egil; Meier, Sonnich; van der Meeren, Terje; Bjørn, Pål Arne (Peer reviewed; Journal article, 2024)Aquaculture provides an important and expanding source of protein rich and healthy food to the world. However, to minimize environmental harm from aquaculture, interactions with wild fish communities need to be thoroughly ... -
Ecosystems monitoring powered by environmental genomics: a review of current strategies with an implementation roadmap
Cordier, Tristan; Alonso Sáez, Laura; Apothéloz-Perret-Gentil, Laure; Aylagas, Eva; Bohan, David A.; Bouchez, Agnès; Chariton, Anthony; Creer, Simon; Frühe, Larissa; Keck, François; Keeley, Nigel B.; Laroche, Olivier; Leese, Florian; Pochon, Xavier; Stoeck, Thorsten; Pawlowski, Jan; Lanzén, Anders (Peer reviewed; Journal article, 2021)A decade after environmental scientists integrated high-throughput sequencing technologies in their toolbox, the genomics-based monitoring of anthropogenic impacts on the biodiversity and functioning of ecosystems is yet ... -
Effect of substrate type and pellet age on the resuspension of Atlantic salmon faecal material
Carvajalino-Fernandez, Marcos Antonio; Keeley, Nigel B.; Fer, Ilker; Law, Brent; Bannister, Raymond (Peer reviewed; Journal article, 2020) -
Effects of fish farm activities on the sponge Weberella bursa, and its associated microbiota
Laroche, Olivier; Meier, Sonnich; Mjøs, Svein A.; Keeley, Nigel B. (Peer reviewed; Journal article, 2021)Sustained growth of world-wide sea farming and the search of optimal growing conditions have driven several countries, including Norway, to establish new finfish sites in more exposed, high current locations. Characterized ... -
Epifaunal habitat associations on mixed and hard bottom substrates in coastal waters of Northern Norway
Dunlop, Katherine Mary; Harendza, Astrid; Plassen, Liv; Keeley, Nigel B. (Peer reviewed; Journal article, 2020)Hard and mixed seafloor substrates are an important benthic habitat in coastal northern Norway and they are known to be colonized by relatively diverse communities of sessile epifauna. These assemblages are highly susceptible ... -
Global Trends of Benthic Bacterial Diversity and Community Composition Along Organic Enrichment Gradients of Salmon Farms
Frühe, Larissa; Dully, Verena; Forster, Dominik; Keeley, Nigel B.; Laroche, Olivier; Pochon, Xavier; Robinson, Shawn; Wilding, Thomas A.; Stoeck, Thorsten (Peer reviewed; Journal article, 2021)The analysis of benthic bacterial community structure has emerged as a powerful alternative to traditional microscopy-based taxonomic approaches to monitor aquaculture disturbance in coastal environments. However, local ... -
Habitat associations of juvenile Atlantic cod (Gadus morhua L.) and sympatric demersal fish communities within shallow inshore nursery grounds
Dunlop, Katherine Mary; Staby, Arved; van der Meeren, Terje; Keeley, Nigel B.; Olsen, Esben Moland; Bannister, Raymond; Skjæraasen, Jon Egil (Peer reviewed; Journal article, 2022)Resolving the relationship between demersal fish and sublittoral biotic habitats and substrates is a key element in the protection of important nursery grounds for strengthening fish recruitment. In Norway, coastal Atlantic ... -
Resilience of dynamic coastal benthic ecosystems in response to large-scale finfish farming
Keeley, Nigel B.; Valdemarsen, Thomas; Woodcock, Skye; Holmer, Marianne; Husa, Vivian; Bannister, Raymond (Journal article; Peer reviewed, 2019)Global expansion of salmon aquaculture is contingent upon finding new, large-capacity farming locations that are, increasingly, situated in dispersive environments with atypical ecological characteristics. The capacity of ... -
Simulating particle organic matter dispersal beneath Atlantic salmon fish farms using different resuspension approaches
Carvajalino-Fernandez, Marcos Antonio; Sævik, Pål Næverlid; Johnsen, Ingrid Askeland; Albretsen, Jon; Keeley, Nigel B. (Peer reviewed; Journal article, 2020)An accurate representation of the particle organic matter (POM) footprint is necessary in order to effectively predict impacts upon benthic communities and the risk of excessive organic enrichment beneath aquaculture ... -
Spatial response of hard- and mixed-bottom benthic epifauna to organic enrichment from salmon aquaculture in northern Norway
Dunlop, Katherine Mary; Harendza, Astrid; Bannister, Raymond; Keeley, Nigel B. (Peer reviewed; Journal article, 2021)Norwegian Atlantic salmon aquaculture is continuing to expand in northern regions dominated by hard- and mixed-bottom substrates. Such habitats contain rich benthic epifaunal communities, including sponges and other sessile ... -
A Substrate-Independent Benthic Sampler (SIBS) for Hard and Mixed-Bottom Marine Habitats: A Proof-of-Concept Study
Keeley, Nigel B.; Laroche, Olivier; Birch, Murray; Pochon, Xavier (Peer reviewed; Journal article, 2021)Sea cage fish farms are increasingly situated over hard and mixed substrate habitats for production and waste-dispersion reasons; yet in many cases, these installations are not being effectively managed with respect to ... -
Suspension-feeding benthic species’ physiological and microbiome response to salmon farming and associated environmental changes
Laroche, Olivier; Meier, Sonnich; Mjøs, Svein Are; Keeley, Nigel B. (Peer reviewed; Journal article, 2022)Caged salmon farming is increasingly undertaken in water bodies with strong hydrodynamics where hard and mixed substrate habitats are more prevalent. Yet, these structurally complex and heterogeneous habitats support diverse ...