Mapping carbon and nitrogen isotopic composition of fingernails to demonstrate a rural–urban nutrition transition in the Center‐West , Northeast, and Amazon regions of Brazil

2020 ◽  
Vol 172 (4) ◽  
pp. 650-663 ◽  
Author(s):  
Gabriela B. Nardoto ◽  
Rodrigo J. da Silva ◽  
Tatiana Schor ◽  
Maria Elisa P. E. Garavello ◽  
Marcia Regina F. Silva ◽  
...  
Keyword(s):  
Isotopic Composition ◽  
Nutrition Transition ◽  
Carbon And Nitrogen ◽  
Nitrogen Isotopic Composition

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

2010 ◽  
Vol 61 (3) ◽  
pp. 302 ◽  
Author(s):  
Matthew D. Taylor ◽  
Debashish Mazumder
Keyword(s):  
Stable Isotopes ◽  
Isotopic Composition ◽  
Turnover Rate ◽  
Isotope Composition ◽  
Wild Fish ◽  
Ontogenetic Changes ◽  
Nitrogen Stable Isotope ◽  
Δ13c And Δ15n ◽  
Carbon And Nitrogen ◽  
Nitrogen Isotopic Composition

Carbon 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.

scholarly journals Impact of contamination and pre-treatment on stable carbon and nitrogen isotopic composition of charred plant remains

2014 ◽  
Vol 28 (23) ◽  
pp. 2497-2510 ◽  
Author(s):  
Petra Vaiglova ◽  
Christophe Snoeck ◽  
Erika Nitsch ◽  
Amy Bogaard ◽  
Julia Lee-Thorp
Keyword(s):  
Isotopic Composition ◽  
Stable Carbon ◽  
Carbon And Nitrogen ◽  
Plant Remains ◽  
Nitrogen Isotopic Composition ◽  
Pre Treatment
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