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Effects of trophic ecology and habitat use on maternal transfer of contaminants in four species of young of the year lamniform sharks.
- Source :
-
Marine environmental research [Mar Environ Res] 2013 Sep; Vol. 90, pp. 27-38. Date of Electronic Publication: 2013 May 29. - Publication Year :
- 2013
-
Abstract
- Organic contaminant and total mercury concentrations were compared in four species of lamniform sharks over several age classes to examine bioaccumulation patterns and gain insights into trophic ecology. Contaminants found in young of the year (YOY) sharks were assumed to be derived from maternal sources and used as a proxy to investigate factors that influence maternal offloading processes. YOY white (Carcharodon carcharias) and mako (Isurus oxyrinchus) sharks had comparable and significantly higher concentrations of PCBs, DDTs, pesticides, and mercury than YOY thresher (Alopias vulpinus) or salmon (Lamna ditropis) sharks. A significant positive relationship was found between YOY contaminant loads and maternal trophic position, suggesting that trophic ecology is one factor that plays an important role in maternal offloading. Differences in organic contaminant signatures and contaminant concentration magnitudes among species corroborated what is known about species habitat use and may be used to provide insights into the feeding ecology of these animals.<br /> (Copyright © 2013 The Authors. Published by Elsevier Ltd.. All rights reserved.)
- Subjects :
- Animals
California
DDT metabolism
Environmental Monitoring
Female
Gas Chromatography-Mass Spectrometry
Liver metabolism
Mercury metabolism
Muscle, Skeletal metabolism
Pesticides metabolism
Polychlorinated Biphenyls metabolism
Sharks growth & development
Sharks metabolism
Species Specificity
Ecosystem
Environmental Exposure
Sharks physiology
Water Pollutants, Chemical metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 1879-0291
- Volume :
- 90
- Database :
- MEDLINE
- Journal :
- Marine environmental research
- Publication Type :
- Academic Journal
- Accession number :
- 23773783
- Full Text :
- https://doi.org/10.1016/j.marenvres.2013.05.009