Svedäng, Henrik
- Swedish Board of Fisheries
Abstract
Diadromous fishes - species that move across salinity gradients as part of their life repertoire - form a major part of coastal and inland fisheries. Conventional mark-recapture techniques have long been used to track their movements, but give incomplete information at best. On the other hand, otoliths (ear-stones) of fishes can provide a complete record of major life history events, as reflected both in their microstructure and elemental composition. Strontium, which substitutes for calcium in the aragonite matrix of otoliths, is a powerful tracer of salinity histories in many migratory fishes. We measured Sr and Ca with a nuclear microprobe (PIXE) and show examples (eel, Anguilla anguilla; brown trout, Salmo trutta; American shad, Alosa sapidissima) of how the technique has solved several mysteries within fisheries biology. (C) 2000 Elsevier Science B.V. All rights reserved.
Keywords
otolith; PIXE; nuclear microprobe
Published in
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
2000, volume: 161-163, pages: 877-881
Publisher: ELSEVIER SCIENCE BV
SLU Authors
UKÄ Subject classification
Bioinformatics and Computational Biology (Methods development to be 10203)
Evolutionary Biology
Subatomic Physics
Publication identifier
- DOI: https://doi.org/10.1016/S0168-583X(99)00923-4
Permanent link to this page (URI)
https://res.slu.se/id/publ/42032