NDLI: Stable isotope analyses of otoliths in identification of hatchery origin of Atlantic salmon (Salmo salar) in Maine

Content Provider	Springer Nature Link
Author	Gao, Yongwen Bean, David
Copyright Year	2008
Abstract	We conducted stable oxygen and carbon isotope analyses for otoliths of Atlantic salmon (Salmo salar), in an attempt to develop a reference database on isotopic variability among private and federal hatcheries in Maine which currently support the salmon aquaculture industry and recovery of endangered populations. During the first phase of our study, we collected 40–50 sagittal otoliths of juvenile Atlantic salmon from each of the five hatcheries and analyzed for stable oxygen and carbon isotope ratios (18O/16O or δ18O, and 13C/12C or δ13C). Combination of δ18O and δ13C signatures in otoliths showed that the five hatcheries can be clearly separated and chemically distinguished. By identifying stable isotopic variations of otoliths from different hatchery settings, we were able to establish some isotopic criteria or standards to assign a likelihood that an individual Atlantic salmon came from a specific hatchery within the reference database. If successful, a diagnostic tool that can provide definitive information on identification of the hatchery origin could serve as a novel marking technique, and the chemical method may provide a more effective alternative to DNA analysis for mixed stocks. Overall our isotopic data from otoliths support the hypothesis that there are detectable differences between the five hatcheries, and multiple statistical analyses indicated that we can correctly distinguish individual Atlantic salmon into a hatchery with high confidence.
Starting Page	429
Ending Page	437
Page Count	9
File Format	PDF
ISSN	03781909
Journal	Environmental Biology of Fishes
Volume Number	83
Issue Number	4
e-ISSN	15735133
Language	English
Publisher	Springer Netherlands
Publisher Date	2008-06-25
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Aquaculture salmon Restoration hatchery Statistical difference δ13C and δ18O Nature Conservation Environment Animal Systematics/Taxonomy/Biogeography Zoology Freshwater & Marine Ecology
Content Type	Text
Resource Type	Article
Subject	Aquatic Science Ecology, Evolution, Behavior and Systematics

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