[MARMAM] Paper: Stable isotope analysis reveals unique trophic niches for two globally threatened species
ana_pinela at hotmail.com
Mon Oct 18 06:33:43 PDT 2010
To whom it may concern:
The following paper has been published in this month's issue of Marine Ecology Progress Series:
Stable isotope analysis reveals habitat partitioning among marine
mammals off the NW African coast and unique trophic niches for two
globally threatened species.
A. M. Pinela, A. Borrell, L. Cardona, A. Aguilar
MEPS 416:295-306 (2010) - doi:10.3354/meps08790
Abstract: Stable isotope abundances of carbon (δ13C) and nitrogen (δ15N)
in the bone of 13 species of marine mammals from the northwest coast of
Africa were investigated to assess their positions in the local trophic
web and their preferred habitats. Also, samples of primary producers
and potential prey species from the study area were collected to
characterise the local isotopic landscape. This characterisation
indicated that δ13C values increased from offshore to nearshore and that δ15N was a good proxy for trophic level. Therefore, the most coastal species were Monachus monachus and Sousa teuszii, whereas the most pelagic were Physeter macrocephalus and Balaenoptera acutorostrata. δ15N values indicated that marine mammals located at the lowest trophic level were B. acutorostrata, Stenella coeruleoalba and Delphinus sp., and those occupying the highest trophic level were M. monachus and P. macrocephalus. The trophic level of Orcinus orca was similar to that of M. monachus, suggesting that O. orca preys on fish. Conservation of coastal and threatened species (M. monachus and S. teuszii)
off NW Africa should be a priority because these species, as the main
apex predators, cannot be replaced by other marine mammals.
Here is the link to the Abstract page: http://www.int-res.com/abstracts/meps/v416/p295-306/
If you are interested in a reprint please write to one of these e-mail addresses:
ana.pinela at gmail.com or anapinela at ub.edu
Thank you very much in advance.
Ana Pinela, Ph.D. Candidate
University of Barcelona
Faculty of Biology
Dpt. Animal Biology
Av. Diagonal 645
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