Stable isotopes reveal post-release trophodynamic and ontogenetic changes in a released finfish, mulloway (Argyrosomus japonicus)

Simple item page
dc.contributor.authorTaylor, MDen_AU
dc.contributor.authorMazumder, Den_AU
dc.date.accessioned2010-04-20en_AU
dc.date.accessioned2010-04-30T05:08:50Zen_AU
dc.date.available2010-04-20en_AU
dc.date.available2010-04-30T05:08:50Zen_AU
dc.date.issued2010-03-29en_AU
dc.date.statistics2010-03-29en_AU
dc.description.abstractCarbon and nitrogen stable isotope ratios were analysed for hatchery-reared, recaptured and wild mulloway, Argyrosomus japonicus, to investigate temporal and growth-related changes in isotopic composition for stocked fish after release, and to evaluate changes in isotopic composition in terms of ontogenetic dietary switches. δ13C and δ15N values decreased and increased, respectively, after release. The isotope composition of released fish was distinct from wild fish until 200 days after release, but after 200 days post-release fish did not differ significantly from wild fish of similar or greater sizes. Abrupt dietary transitions from crustaceans to teleost fish (>50 cm total length (TL)) were evident in a rapid δ13C and δ15N change in wild mulloway, and δ15N was significantly greater in wild fish >65 cm TL compared with wild fish <50 cm TL. Multivariate carbon and nitrogen isotopic data were suitable for separating stocked and wild fish for up to 200 days after release, but did not separate wild fish grouped according to dietary composition. Carbon and nitrogen isotopic composition closely reflected dietary transitions and rapid adaptation by stocked mulloway to wild diets, which was evident in a high tissue turnover rate of up to 0.017 day–1. Stable isotopes are a useful tool for examining the integration of released fish into stocked ecosystems and can be used to describe convergence in the diets of wild and released fish. © 2010, CSIRO Publishingen_AU
dc.identifier.citationTaylor, M. D., & Mazumder, D. (2010). Stable isotopes reveal post-release trophodynamic and ontogenetic changes in a released finfish, mulloway (Argyrosomus japonicus). Marine and Freshwater Research, 61(3), 302-308. doi:10.1071/MF09014en_AU
dc.identifier.govdoc1568en_AU
dc.identifier.issn1323-1650en_AU
dc.identifier.issue3en_AU
dc.identifier.journaltitleMarine and Freshwater Researchen_AU
dc.identifier.pagination302-308en_AU
dc.identifier.urihttp://dx.doi.org/10.1071/MF09014en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/3236en_AU
dc.identifier.volume61en_AU
dc.language.isoenen_AU
dc.publisherCSIRO Publishingen_AU
dc.subjectDieten_AU
dc.subjectStable isotopesen_AU
dc.subjectFishesen_AU
dc.subjectIsotope ratioen_AU
dc.subjectBiological adaptationen_AU
dc.subjectGrowthen_AU
dc.titleStable isotopes reveal post-release trophodynamic and ontogenetic changes in a released finfish, mulloway (Argyrosomus japonicus)en_AU
dc.typeJournal Articleen_AU
Files
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.78 KB
Format:
Plain Text
Description:
Download
Collections
Journal Articles