Effects of a salmon fish farm on benthic habitats in a high-energy hydrodynamic system: The case of the Rade de Cherbourg (English Channel)

Dauvin, Jean–Claude; Pezy, Jean‐Philippe; Baffreau, Alexandrine; Bachelet, Quentin; Baux, Noémie; Méar, Yann; Murat, Anne; Poizot, Emmanuel

doi:10.1016/j.aquaculture.2019.734832

Cited by 11 publications

(16 citation statements)

References 69 publications

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“…Conversely, in S1, the portion of the population composed of large fish fed with large pellets is considerably smaller, resulting in the F ch fraction being smaller, too. The most relevant environmental consequence of cage fish farming is the organic enrichment of the seabed in the vicinity of the farm, which is mostly caused by accumulation of supplied but uneaten feed and feces [41,42], especially below the cages [43]. In the case of GHSB, the fraction corresponding to F ch should be added to the solid waste budget [18].…”

Section: Discussionmentioning

confidence: 99%

Influence of Production Strategy on Gross Waste Output and Temporal Pattern of Gilthead Seabream (Sparus Aurata) Farming: Implications for Environmental Management

Aguado‐Giménez

Ballester-Moltó²,

García‐García³

2022

Water

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This study compares the farm management model used in the Mediterranean gilthead seabream (GHSB; Sparus aurata) industry (S1)—stepped entry of juveniles throughout the year with several production cycles and fish ages overlapping in a single farm—with that used in the salmon industry (S2)—the whole is farm filled with fish that are the same age at once with a fallowing period between rearing cycles—in terms of waste production by coupling digestibility coefficients with growth, feeding, and eating behavior models into a mass balance model. We considered the total C, N, and P content in the different waste fractions (particulate and dissolved wastes). The model, which simulated real farming conditions, showed relevant quantitative and qualitative differences between both strategies, with stocked biomass and water temperature as the main drivers, the amount of feed wasted by chewing as the most relevant fraction differentiating both strategies, and the fallowing period as the main distinguishing management feature. We discuss the influence of both farming strategies on some key performance and environmental aspects, such as benthic recovery, the breakdown of the life cycle of pathogens, and adaptability to climate change. Our results suggest that changing the GHSB industry’s production model is necessary for its sustainability.

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Section: Discussionmentioning

confidence: 99%

Influence of Production Strategy on Gross Waste Output and Temporal Pattern of Gilthead Seabream (Sparus Aurata) Farming: Implications for Environmental Management

Aguado‐Giménez

Ballester-Moltó²,

García‐García³

2022

Water

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“…Future large-scale wind farming in the North Sea will have a measurable impact on pelagic primary production through the effects of Jassa and other filter feeders settled on the wind turbines' sub-sea platforms (Slavik et al 2019). Jassa can also respond positively to organic matter accumulation and an enhanced hydrodynamic regime created by such artificial enclosures as fish farms by increasing densities under and near the nets (Dauvin et al 2020). The resulting dense fouling mats have a significant impact on their surroundings, covering aquaculture facilities, plugging seawater systems, and overgrowing other sessile organisms (Sebens 1985;Beermann & Franke 2012;Fernandez-Gonzalez 2014examples in this text).…”

Section: Morphologies Related To Tubicolymentioning

confidence: 99%

Untitled

2021

Zootaxa

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The amphipod genus Jassa Leach, 1814 now comprises 24 species that occur in temperate regions of both hemispheres on solid substrates from the lower intertidal zone to 500 m depth. The propensity for some species to form dense colonies in water intake structures and offshore platforms has brought them to attention as an unwanted pest. Based on the examination of ~25,000 specimens from ~1,100 museum and private collections, it is evident that some species of Jassa have been transported by human vectors since at least the 19 th century and now occur widely. Their colonial, tube-living habit enables such transport, and collection records document them on ships, buoys and portable water systems as well as on natural movable substrates such as logs, drift algae and larger crustaceans. Because Jassa can be so readily found, but species discrimination has had a problematic history, the purpose of this monograph is to assist researchers to identify species through illustrations, descriptions, keys and habitat summaries. Seven species which were named in the 19 th century but CONLAN ET AL.

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“…Environmental variability is believed to be the key to changes in microbenthic structure expressed by variation in index values. Depending on the location, the main environmental factors affecting the distribution and structure of macrobenthic animals reported by most authors, such as food availability, particularly organic matter, salinity and sediment characteristics, especially mud or clay content, and hydrodynamic water ecosystem, explained a significant part of macrobenthic spatial patterns [1,10,14,15,18].…”

Section: Expressing the Macrobenthic Assemblages With Indicesmentioning

confidence: 99%

“…Concerning salmon fish farms, ref. [18] reported on the relation between abundances of opportunistic and sensitive taxa and the environmental impact of salmon cages. They found that opportunistic taxa were more abundant in the assemblages impacted by the farm and that, on the contrary, sensitive taxa were more abundant in the unimpacted reference assemblages.…”

Section: Expressing the Macrobenthic Assemblages With Indicesmentioning

confidence: 99%

Biomonitoring of the Application of Monoculture and Integrated Multi-Trophic Aquaculture (IMTA) Using Macrobenthic Structures at Tembelas Island, Kepulauan Riau Province, Indonesia

Putro

Sharani

Widowati

et al. 2020

JMSE

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Sustainable aquaculture needs to be considered when it comes to the utilization of water resources. The aim of this study was to apply biomonitoring using macrobenthic structures on both spatial and temporal applications of monoculture and integrated multi-trophic aquaculture (IMTA) at Tembelas Island, Kepulauan Riau Province, Indonesia. Samples of sediment were taken from three fish farm locations, namely from an IMTA site, a monoculture site, and a reference site. Macrobenthic organisms obtained through rinsing, sieving, and sorting were then identified under a stereo-microscope. Diversity of the macrobenthic assemblages was analyzed with a Shannon-Wiener index (H’). Equitability was expressed through Pielou’s evenness index. Finally, Bray-Curtis’ non-metric multi-dimensional scaling (NMDS) was used for similarities derived from log (X+1) transformed macrobenthic abundance to provide a visual representation of differences in their structure between sites over time. Results showed polychaetes exhibited differences in both variation and abundance of genera between the farm and reference site. The assemblage of macrobenthos at the IMTA site consisted of 9 genera of gastropods, 3 genera of bivalves, 5 genera of polychaetes, and 2 genera of crustaceans. At the monoculture site, 12 genera of gastropods, 4 genera of bivalves, 8 genera of polychaetes, 1 genera of crustaceans, and 1 genera of ophiuroid were observed. A relatively high abundance was observed at the reference site, with 27 genera of gastropods, 11 genera of bivalves, 3 genera of polychaetes, and 1 genera of crustacean. The favorable water conditions and possible absence of waste input from aquaculture resulting in a more suitable habitat for macrobenthic life may explain this relative abundance. Some of them were recognised as opportunistic taxa, i.e., Capitella sp., Heteromastus sp., and Lumbrinereis sp. Based on the diversity and evenness indices and the MNDS ordination, it can be concluded that the application of IMTA systems results in a suppressed or reduced potential impact on environmental disturbance due to aquacultural activities.

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Effects of a salmon fish farm on benthic habitats in a high-energy hydrodynamic system: The case of the Rade de Cherbourg (English Channel)

Cited by 11 publications

References 69 publications

Influence of Production Strategy on Gross Waste Output and Temporal Pattern of Gilthead Seabream (Sparus Aurata) Farming: Implications for Environmental Management

Influence of Production Strategy on Gross Waste Output and Temporal Pattern of Gilthead Seabream (Sparus Aurata) Farming: Implications for Environmental Management

Untitled

Biomonitoring of the Application of Monoculture and Integrated Multi-Trophic Aquaculture (IMTA) Using Macrobenthic Structures at Tembelas Island, Kepulauan Riau Province, Indonesia

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