The degradation of fish-cage waste in sediments during fallowing
By Tony K. McGhie, C. Crawford, Iona M. Mitchell, Dominique S O'Brien. 2000
129 citations recorded by the source corpus.
Abstract The composition and rate of degradation of organic waste deposited in sediment underneath and adjacent to fish cages in the Huon Estuary, Tasmania, Australia, were investigated. Sediment samples from two near-adjacent sites, but with different sediment types and depths, were analyzed for total organic matter, lipids (fatty acids and sterols), %C, δ 13 C, %N, δ 15 N, and redox potential during a 12-month fallowing period. Additionally, representative samples of fish food and fish faeces were analyzed. It was found that most of the accumulation of organic matter was confined to an area directly underneath the fish cages, but at 30 m from the center of the cage, indicators of fish cage waste (faeces and fish food) were still elevated compared with reference sites. As both fish food and faeces have distinctive fatty acid profiles, the relative proportion of food and/or faeces deposited on the sediment could be determined. After 12 months fallowing, fish-farm-derived organic matter in surface sediment at the center of the cage remained greater than at 30 m distance, even though redox potentials indicated that normal oxic conditions had returned.
Subfields: Aquatic Science, Ecology, Global and Planetary Change
View Paper: https://www.semanticscholar.org/paper/6b75d621fecf0e65b791bf646366e4b45d5d1939
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Aquatic Science
In Ecology
In Global and Planetary Change
Citations in the corpus
- Effects of fish farming waste to sedimentary and particulate organic matter in a southern Mediterranean area (Gulf of Castellammare, Sicily): a multiple stable isotope study (δ13C and δ15N) (2004, background): “Biochemical tracers, such as stable isotopes and, in particular, the carbon isotope, have rarely been used (Hansen et al., 1991; Ye et al., 1991; McGhie et al., 2000; Sutherland et al., 2001).”
- Quantifying aquaculture-derived organic matter in the sediment in and around a coastal fish farm using stable carbon and nitrogen isotope ratios (2006, methodology): “6‰ (McGhie et al., 2000) and −1.”