Mercury isotopes as tracers of ecology and metabolism in two sympatric shark species.
Journal
Environmental pollution (Barking, Essex : 1987)
ISSN: 1873-6424
Titre abrégé: Environ Pollut
Pays: England
ID NLM: 8804476
Informations de publication
Date de publication:
Oct 2020
Oct 2020
Historique:
received:
27
04
2020
revised:
27
05
2020
accepted:
01
06
2020
pubmed:
27
6
2020
medline:
19
8
2020
entrez:
27
6
2020
Statut:
ppublish
Résumé
In coastal ecosystems, top predators are exposed to a wide variety of nutrient and contaminant sources due to the diversity of trophic webs within inshore marine habitats. Mercury contamination could represent an additional threat to shark populations that are declining worldwide. Here we measured total mercury, carbon and nitrogen isotopes, as well as mercury isotopes, in two co-occurring shark species (the bull shark Carcharhinus leucas and the tiger shark Galeocerdo cuvier) and their potential prey from a coastal ecosystem of the western Indian Ocean (La Réunion Island). Our primary goals were to (i) determine the main trophic Hg sources for sharks and (ii) better characterize their diet composition and foraging habitat. Hg isotope signatures (Δ
Identifiants
pubmed: 32590319
pii: S0269-7491(20)33198-5
doi: 10.1016/j.envpol.2020.114931
pii:
doi:
Substances chimiques
Carbon Isotopes
0
Mercury Isotopes
0
Nitrogen Isotopes
0
Mercury
FXS1BY2PGL
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
114931Informations de copyright
Copyright © 2020 Elsevier Ltd. All rights reserved.
Déclaration de conflit d'intérêts
Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.