Dispersal and assimilation of an aquaculture waste subsidy in a low productivity coastal environment

White, Camille A.; Nichols, Peter D.; Ross, D. J.; Dempster, Tim

doi:10.1016/j.marpolbul.2017.05.042

Cited by 24 publications

(25 citation statements)

References 83 publications

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“…; White et al . ) However, White et al . () did observe an overall shift in FA composition of benthic polychaetes found in close proximity to farm sites, corresponding to increases in arachidonic acid (ARA) in body tissue.…”

Section: Synthesis and Discussionmentioning

confidence: 98%

“…) However, White et al . () did observe an overall shift in FA composition of benthic polychaetes found in close proximity to farm sites, corresponding to increases in arachidonic acid (ARA) in body tissue. As ARA is converted from LA via desaturation and elongation steps, it is very likely that dietary LA is being elongated to form ARA through similar metabolic pathways.…”

Section: Synthesis and Discussionmentioning

confidence: 98%

“…For example, using C 18 PUFA as biomarkers, White et al . () failed to detect an aquaculture signal in benthic polychaetes in Macquarie Harbour, Australia, despite aquafeeds being high in terrestrial oils and ecological studies indicating benthic polychaetes are attracted to and will consume waste (Ross et al . ; White et al .…”

Section: Synthesis and Discussionmentioning

confidence: 99%

“…; White et al . ), with the animal's biosynthetic capability suggested as the most plausible explanation. In these instances, differentiation between selective retention of FA and biosynthetic capacity, along with uptake of aquaculture‐derived FA, was only possible because of empirical knowledge of the FA metabolism in the target animal.…”

Section: Synthesis and Discussionmentioning

confidence: 99%

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Terrestrial fatty acids as tracers of finfish aquaculture waste in the marine environment

White

Woodcock

Bannister

et al. 2017

Reviews in Aquaculture

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Waste from open‐cage aquaculture flows directly into the marine environment from uneaten feeds, faecal material and dissolved nutrients. Sustainable management outcomes are regularly based on the dispersal patterns of the waste, with biochemical tracing a key tool in understanding the footprint of aquaculture. We examined the use of fatty acid (FA) analysis to trace aquaculture waste for this purpose, with the aim of identifying specific biomarkers for environmental applications, as well as identifying challenges that are regularly encountered. Overall, the widespread use of terrestrial‐based oils in the production of marine aquaculture feeds has increased the use of FA biomarkers to trace aquaculture waste across benthic and pelagic systems, in vertebrates, invertebrates and environmental samples such as sediment and seston. A combination of linoleic acid (LA), oleic acid (OA) and α‐linolenic acid (ALA), which are dominant C18 FA in terrestrial seed and animal oils, is the most commonly used biomarkers, along with overall shifts in FA profile related to diet. A challenge regularly encountered, particularly in lower trophic species, was the capacity of an organism to biomodify or selectively spare certain dietary FA, which can mask assimilation of aquaculture‐derived FA. In these species, controlled feeding studies are needed to properly understand FA metabolism and to ensure correct interpretation of FA data collected from wild samples. Overall, as FA biomarkers have the capacity to link aquaculture waste in the environment with potential effect, they are a valuable and increasingly applied tool for examining the overall influence of aquaculture in marine ecosystems.

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Section: Synthesis and Discussionmentioning

confidence: 98%

Section: Synthesis and Discussionmentioning

confidence: 98%

Section: Synthesis and Discussionmentioning

confidence: 99%

Section: Synthesis and Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Terrestrial fatty acids as tracers of finfish aquaculture waste in the marine environment

White

Woodcock

Bannister

et al. 2017

Reviews in Aquaculture

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“…Flocculent matter and fish wastes can be a food source for benthic organisms, given their accessibility and high nutritive value (i.e., enrichment in lipids and ω3 and ω6 fatty acids; Salvo et al, 2015b;White et al, 2016White et al, , 2017. Copper values above 50-150 mg·kg −1 exceed levels considered safe for various animal species (Debourg et al, 1993;Burridge et al, 1999); similarly Zn values above the threshold of 260 µg·g −1 exceed the apparent effects value (Burridge et al, 2010).…”

Section: Trace Metals and Other Elementsmentioning

confidence: 99%

Measurement of Aquaculture Chemotherapeutants in Flocculent Matter Collected at a Hard-Bottom Dominated Finfish Site on the South Coast of Newfoundland (Canada) After 2 Years of Fallow

et al. 2018

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The expansion of aquaculture is resulting in sites being installed over a diversity of substrate types, leading to different potential chemotherapeutant degradation scenarios. There is little to no information on the biodegradation and/or persistence of chemotherapeutants at hard-bottom dominated aquaculture sites having little natural sediment. In this study, we measured organic matter (OM) content and concentrations of chemicals linked to finfish aquaculture activities (trace elements, antibiotics and parasiticides) in flocculent matter samples collected close to cages at a site fallowed for 2 years and at an active site, the latter being indicative of flocculent chemical signature during production. Our results show persistence of flocculent matter after 2 years of fallow. The chemical signature of the samples confirms that Cu, Zn, Ca, and P, present around fish cages, are direct markers of aquaculture wastes. Persistence of two pyrethroids, one avermectin, and one antibiotic in grab samples show a potentially lasting association between these chemicals and the OM from fish feed and wastes, even after 2 years. Overall, the concentrations measured do not indicate a direct lethal toxicity on marine organisms (as per studies described in literature) except for Zn. Nevertheless, the long-term persistence of a flocculent mixture rich in chemicals and the lack of information on sublethal and synergistic effects on hard-bottom communities calls for caution and additional studies.

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Is Holothuria tubulosa the golden goose of ecological aquaculture in the Mediterranean Sea?

Sadoul

Caprioli²,

Barrier-Loiseau

et al. 2022

Aquaculture

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Dispersal and assimilation of an aquaculture waste subsidy in a low productivity coastal environment

Cited by 24 publications

References 83 publications

Terrestrial fatty acids as tracers of finfish aquaculture waste in the marine environment

Terrestrial fatty acids as tracers of finfish aquaculture waste in the marine environment

Measurement of Aquaculture Chemotherapeutants in Flocculent Matter Collected at a Hard-Bottom Dominated Finfish Site on the South Coast of Newfoundland (Canada) After 2 Years of Fallow

Is Holothuria tubulosa the golden goose of ecological aquaculture in the Mediterranean Sea?

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