Detecting the presence of fish farm-derived organic matter at the seafloor using stable isotope analysis of phospholipid fatty acids /631/1647/296 /631/1647/2234 /631/326/171 /704/172/169/895 /704/172/4081 article

Daniel J. Mayor*, Nia B. Gray, Giannina S.I. Hattich, Barry Thornton

*Korresponderande författare för detta arbete

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

2 Citeringar (Scopus)

Sammanfattning

The expansion of global aquaculture activities is important for the wellbeing of future generations in terms of employment and food security. Rearing animals in open-exchange cages permits the release of organic wastes, some of which ultimately reaches the underlying sediments. The development of rapid, quantitative and objective monitoring techniques is therefore central to the environmentally sustainable growth of the aquaculture industry. Here, we demonstrate that fish farm-derived organic wastes can be readily detected at the seafloor by quantifying sediment phospholipid fatty acids (PLFAs) and their carbon stable isotope signatures. Observations across five farms reveal that farm size and/or distance away from it influence the spatial distribution of the generated organic wastes and their effect on benthic bacterial biomass. Comparison to the isotopic signatures of fish feed-derived PLFAs indicates that 16:0 and 18:1(n-9) are potential biomarkers for fish farm-derived organic wastes. Our results suggest that stable isotope analysis of sediment PLFAs has potential for monitoring the environmental performance of aquaculture activities, particularly given the increasing prevalence of terrigenous organic matter in aquaculture feed stocks because it is isotopically district to marine organic matter.

OriginalspråkEngelska
Artikelnummer5146
TidskriftScientific Reports
Volym7
Utgåva1
DOI
StatusPublicerad - 1 dec 2017
MoE-publikationstypA1 Tidskriftsartikel-refererad

Fingeravtryck

Fördjupa i forskningsämnen för ”Detecting the presence of fish farm-derived organic matter at the seafloor using stable isotope analysis of phospholipid fatty acids /631/1647/296 /631/1647/2234 /631/326/171 /704/172/169/895 /704/172/4081 article”. Tillsammans bildar de ett unikt fingeravtryck.

Citera det här