Dispersal and assimilation of an aquaculture waste subsidy in a low productivity coastal environment.
Mar Pollut Bull
; 120(1-2): 309-321, 2017 Jul 15.
Article
en En
| MEDLINE
| ID: mdl-28535958
ABSTRACT
To understand dispersal and assimilation of aquaculture waste subsidies in a naturally low-productivity environment, we applied a novel, rapid transmethylation technique to analyse sediment and biota fatty acid composition. This technique was initially validated at Atlantic salmon farms in Macquarie Harbour, Australia, where sediments were collected at farm and control locations. Subsequently, sediment, benthic polychaete and zooplankton were sampled at sites 0, 50, 250, 500 and 1000m distant from multiple cages. Results demonstrated an acute deposition zone up to 50m from cages and a diffuse zone extending 500m from cages. Changes in sediment concentration of linoleic acid, oleic acid and total fatty acids were effective tracers of farm deposition. Bacterial biomarkers indicated that aquaculture waste stimulates bacterial productivity in sediments, with elevated biomarker concentrations also detected in benthic polychaetes. Overall, fatty acid analysis was a sensitive technique to characterize the benthic footprint of aquaculture influence.
Palabras clave
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Eliminación de Residuos Líquidos
/
Monitoreo del Ambiente
/
Acuicultura
/
Ácidos Grasos
Límite:
Animals
País/Región como asunto:
Oceania
Idioma:
En
Revista:
Mar Pollut Bull
Año:
2017
Tipo del documento:
Article