Reference : Assessment of gestation, lactation and fasting on stable isotope ratios in northern elep...
Scientific journals : Article
Life sciences : Aquatic sciences & oceanology
Life sciences : Environmental sciences & ecology
http://hdl.handle.net/2268/12401
Assessment of gestation, lactation and fasting on stable isotope ratios in northern elephant seals (Mirounga angustirostris)
English
Habran, Sarah mailto [Université de Liège - ULg > Département des sciences et gestion de l'environnement > Océanologie >]
Debier, Cathy [ > > ]
Crocker, Dan E. [ > > ]
Houser, Dorian S. [ > > ]
Lepoint, Gilles mailto [Université de Liège - ULg > Département des sciences et gestion de l'environnement > Océanologie >]
Bouquegneau, Jean-Marie mailto [Université de Liège - ULg > Département des sciences et gestion de l'environnement > Océanologie >]
Das, Krishna mailto [Université de Liège - ULg > Département des sciences et gestion de l'environnement > Océanologie >]
Oct-2010
Marine Mammal Sciences
Wiley-Backwell Publishing
26
4
880-895
Yes (verified by ORBi)
International
0824-0469
MA
[en] northern elephant seal ; Mirounga angustirostris ; stable isotopes ; lactation ; fasting ; gestation
[en] Effects of physiological processes such as gestation, lactation and nutritional stress on stable isotope ratios remain poorly understood. To determine their impact, we investigated these processes in simultaneously fasting and lactating northern elephant seals (Mirounga angustirostris). Stable carbon and nitrogen isotope values were measured in blood and milk of 10 mother-pup pairs on days 5 and 22 of lactation. As long- and short-term integrators of diet, blood cells and serum may reflect foraging data or energy reserves from late gestation and lactation, respectively. Limited changes in isotopic signatures of maternal blood over the lactating period were highlighted. Nitrogen isotope fractionation associated with mother-to-offspring transfer of nutrients was generated between mother and offspring during gestation
and lactation. This fractionation was tissue and time-specific, it varied between early and late lactation from +0.6‰ to +1.3‰ in blood cells and from +1.1‰ to nonsignificant value in serum. Therefore, if pups appear to be good proxies to investigate the female trophic ecology especially for C sources, much more caution is required in using δ15N values. Further studies are also needed to better define the relative impact of fasting and lactation on the enrichment or depletion of isotopes in different tissues.
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
Researchers ; Professionals
http://hdl.handle.net/2268/12401
10.1111/j.1748-7692.2010.00372.x
http://onlinelibrary.wiley.com/doi/10.1111/j.1748-7692.2010.00372.x/abstract

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Restricted access
Habran_2010_MMS.pdfPublisher postprint264.22 kBRequest copy

Bookmark and Share SFX Query

All documents in ORBi are protected by a user license.