IMIS | Flanders Marine Institute
 

Flanders Marine Institute

Platform for marine research

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

Evidence of abalone (Haliotis rubra) diet from combined fatty acid and stable isotope analyses
Guest, M.A.; Nichols, P.D.; Frusher, S.D.; Hirst, A.J. (2008). Evidence of abalone (Haliotis rubra) diet from combined fatty acid and stable isotope analyses. Mar. Biol. (Berl.) 153(4): 579-588. hdl.handle.net/10.1007/s00227-007-0831-9
In: Marine Biology. Springer: Heidelberg; Berlin. ISSN 0025-3162, more
Peer reviewed article  

Available in Authors 

Keyword
    Marine

Authors  Top 
  • Guest, M.A.
  • Nichols, P.D.
  • Frusher, S.D.
  • Hirst, A.J.

Abstract
    Abalone are common herbivores throughout temperate and tropical waters, and yet the contribution of red and brown macroalgae to the diet of wild abalone remains unclear. In the northern hemisphere, adult abalone are considered to consume predominantly brown algae, but in the southern hemisphere abalone are thought to prefer red algae. Conventional methods such as gut content analysis and feeding trials provide some insight into diet choice, but the associated biases of these techniques create uncertainty surrounding the aforementioned variability in abalone diet. We use combined stable isotope and fatty acid analysis to determine the relative contribution of red algae, brown algae and detritus/microalgae to the diet of wild abalone in Tasmanian waters. Stable isotopes of carbon suggest that brown algae and/detritus are a more important source of carbon than red algae. Fatty acid analysis confirmed the larger contribution of brown algae to the diet of abalone, and also identified the bacterial and diatom component of detritus to be an important contributor to abalone diet. These results show combined use of chemical tracers to be a promising technique for resolving abalone diet, and challenge current perceptions regarding spatial variability in abalone diet choice.

All data in IMIS is subject to the VLIZ privacy policy Top | Authors