Whinam, J.; Copson, G.; Chapuis, J.-L. (2006). Subantarctic Terrestrial Conservation and Management.
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Whinam J., Copson G. & Chapuis J.L. (2006). Subantarctic terrestrial conservation and management..
Abstract: In: Bergstrom DM, Convey P & Huiskes AHL (eds), Trends in Antarctic Terrestrial and Limnetic Ecosystems: Antarctica as a global indicator. Springer, Dordrecht, The Netherlands
Programme: 136
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Wheeler R. & Alix C. (2004). Economical and Cultural Significance of driftwood in Coastal Communities of Southwest Alaska. Report to Cooperative Extension Services..
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Wenjie Lei, Youyi Ruan, Ebru Bozda?, Daniel Peter, Matthieu Lefebvre, Dimitri Komatitsch, Jeroen Tromp, Judith Hill, Norbert Podhorszki, David Pugmire. (2020). (Vol. 223).
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Wendler G., Andre J.C., Pettre P., Gosink J. & Parish T. (1993). Antarctic research series, , 23–46.
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. (2011). Continuous 25-yr aerosol records at coastal Antarctica I: inter-annual variability of ionic compounds and links to climate indices. Tellus B, .
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Welker, J., Harding, A.M.A., Karnovsky, N.J., Steen, H., Strom, H. & Gabrielsen, G.W. (2009). Flexibility in the bimodal foraging strategy of a high Arctic alcid, the little auk Alle alle. J. Avian Biol., 40, 388–399.
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WELCKER, J., STEEN, H., HARDING, A.M.A. & GABRIELSEN, G.W. (2009). Sex-specific provisioning behaviour in a monomorphic seabird with a bimodal foraging strategy. Ibis (Lond. 1859), 141, 502–513.
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Welcker Jorg, Harding Ann M A, Kitaysky Alexander S, Speakman John R, . (2009). Daily energy expenditure increases in response to low nutritional stress in an Arctic-breeding seabird with no effect on mortality
. Functional Ecology, 23(6), 1081–1090.
Abstract: 1. The regulation of energy expenditure in relation to food availability and its consequences for individual fitness in free-ranging animals are poorly understood. Increased daily energy expenditure (DEE) may be viewed as the result of two different processes: expenditure may be forced
Programme: 388
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Welcker Jorg, Chastel Olivier, Gabrielsen Geir W, Guillaumin Jerome, Kitaysky Alexander S, Speakman John R, Tremblay Yann, Bech Claus, . (2013). Thyroid Hormones Correlate with Basal Metabolic Rate but Not Field Metabolic Rate in a Wild Bird Species
. PLOS ONE, 8(2).
Abstract: Thyroid hormones (TH) are known to stimulate in vitro oxygen consumption of tissues in mammals and birds. Hence, in many laboratory studies a positive relationship between TH concentrations and basal metabolic rate (BMR) has been demonstrated whereas evidence from species in the wild is scarce. Even though basal and field metabolic rates (FMR) are often thought to be intrinsically linked it is still unknown whether a relationship between TH and FMR exists. Here we determine the relationship between the primary thyroid hormone triiodothyronine (T3) with both BMR and FMR in a wild bird species, the black-legged kittiwake (Rissa tridactyla). As predicted we found a strong and positive relationship between plasma concentrations of T3 and both BMR and mass-independent BMR with coefficients of determination ranging from 0.36 to 0.60. In contrast there was no association of T3 levels with either whole-body or mass-independent FMR (R2 = 0.06 and 0.02, respectively). In accordance with in vitro studies our data suggests that TH play an important role in modulating BMR and may serve as a proxy for basal metabolism in wild birds. However, the lack of a relationship between TH and FMR indicates that levels of physical activity in kittiwakes are largely independent of TH concentrations and support recent studies that cast doubt on a direct linkage between BMR and FMR.
Programme: 330
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