Consulta: subjectFacets:"Trophic position"
Registros recuperados: 2
Data/hora: 13/06/2024 05:24:03

Global data set for nitrogen and carbon stable isotopes of tunas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bodin, Nathalie; Pethybridge, Heidi; Duffy, Leanne M.; Lorrain, Anne; Allain, Valerie; Logan, John M.; Ménard, Frederic; Graham, Brittany; Choy, C. Anela; Somes, Christopher J.; Olson, Robert J.; Young, Jock W.
Nitrogen and carbon stable isotope data sets are commonly used to assess complex population to ecosystem responses to natural or anthropogenic changes at regional to global spatial scales, and monthly to decadal timescales. Measured in the tissues of consumers, nitrogen isotopes (δ15N) are primarily used to estimate trophic position while carbon isotopes (δ13C) describe habitat associations and feeding pathways. Models of both δ15N and δ13C values and their associated variance can be used to estimate likely dietary contributions and niche width and provide inferences about consumer movement and migration. Stable isotope data have added utility when used in combination with other empirical data sets (e.g., stomach content, movement tracking,...
Tipo: Text
Palavras-chave: Baseline isotopic variability; Food web dynamics; Global Ocean; Marine top predators; Pelagic ecosystem; Scombrids; Trophic position.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00665/77750/79872.pdf

Variability in the trophic position of larval fishes in theupper Paraná floodplain based on δ15N
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: Manetta,Gislaine I; Bialetzki,Andréa; Martinelli,Luiz A; Benedito,Evanilde.
The upper Paraná River floodplain is composed of several marginal lagoons, making it a natural breeding ground for many fish species at developmental stages. The aim of this study is to estimate the trophic positions of these fishes based on feed intake (measured via diet) and nitrogen assimilation (measured via δ15N). The monthly samplings were concentrated during the spawning season in the Ivinheima River, which is located in the upper Paraná River floodplain. The specimens were grouped into preflexion, flexion and postflexion stages. Trophic positions were estimated based on the isotope value of nitrogen and on diet. During the developmental stages of P. squamosissimus, there were significant differences in the isotope values of δ15N; for H. edentatus,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish; Larval development; Trophic position; Δ15N.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000200016