Stable isotopes as a useful tool for revealing the environmental fate and trophic effect of open-sea-cage fish farm wastes on marine benthic organisms with different feeding guilds

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

14 Scopus Citations
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Author(s)

  • Tak-Cheung Wai
  • Rudolf S.S. Wu
  • Paul K.S. Shin
  • X.Y. Li
  • Joseph H.W. Lee

Detail(s)

Original languageEnglish
Pages (from-to)77-85
Journal / PublicationMarine Pollution Bulletin
Volume63
Issue number5-12
Online published8 Jun 2011
Publication statusPublished - 2011

Abstract

Environmental fate of fish farm wastes (FFW) released from an open-sea-cage farm at Kat O, Hong Kong was examined by measuring carbon and nitrogen stable isotope (SI) ratios in selected benthic organisms collected along a 2000m transect from the farm. Our results showed that FFW significantly influenced the energy utilization profile of consumers near the fish farm. Although nitrogen enrichment effect on δ15N was anticipated in biota near the farm, the predicted patterns did not consistently occur in all feeding guilds. Two species of suspension-feeders, which relied on naturally δ15N-depleted sources, were δ15N-enriched near the fish farm. In contrast, both species of benthic grazer and deposit-feeder, which relied on naturally δ15N-enriched algal sources, were δ15N-depleted under the influence of FFW. The SI signatures of biota can, therefore, serve as feasible biomarkers for FFW discharges only when the trophic structure of the receiving environment is fully elucidated. © 2011 Elsevier Ltd.

Research Area(s)

  • Anthropogenic nutrients, Fish farming, Stable isotope, Trophic dynamics

Citation Format(s)

Stable isotopes as a useful tool for revealing the environmental fate and trophic effect of open-sea-cage fish farm wastes on marine benthic organisms with different feeding guilds. / Wai, Tak-Cheung; Leung, Kenneth M.Y.; Wu, Rudolf S.S.; Shin, Paul K.S.; Cheung, S.G.; Li, X.Y.; Lee, Joseph H.W.

In: Marine Pollution Bulletin, Vol. 63, No. 5-12, 2011, p. 77-85.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review