Eldershaw TP, Duchamp C, Ye J, Clark MG, Colquhoun EQ. (1997). Potential for nonshivering thermogenesis in perfused chicken (Gallus domesticus) muscle. Comp. Biochem. Physiol., Part A Mol. Integr. Physiol., 117A(4), 545–554.
Abstract: The humoral modulation of resting muscle heat production of chickens (Gallus
domesticus) was investigated in vitro. The resting distal lower limb was perfused
via the popliteal artery at 25 degrees C without erythrocytes at constant flow.
The preparation was stable for at least 3 hr, showing a constant oxygen uptake
(MO2) and perfusion pressure as well as adequately maintaining muscle energy
charge and creatine phosphate: creatine ratio. Noradrenaline (NOR), adrenaline
(ADR) and serotonin (5-HT) each caused a dose-dependent rise in perfusion
pressure. NOR and ADR evoked increased MO2 at low doses eventually followed by
decreased MO2 at higher agonist concentrations. 5-HT gave smaller but
qualitatively similar MO2 effects. The actions of 50 nM NOR were blocked by
prazosin (10 microM) and nitroprusside (0.5 mM), but not altered by propranolol
(10 microM). NOR-induced stimulatory MO2 changes in the presence of
pharmacological concentrations (1 microM) of glucagon were more pronounced and
the thermogenic concentration range of NOR was increased. Taken together, these
in vitro findings demonstrate a potential for vasoconstrictor-controlled muscle
nonshivering thermogenesis in birds as in marsupials and mammals, suggesting that
vascular control of muscle MO2 may be a widespread biological mechanism. The
possible implications of these findings for avian nonshivering thermogenesis are
discussed.
Programme: 131
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Stenni B., Serra F., Frezzotti M., Maggi V., Traversi R., Becagli S. & Udisti R. (2000). Snow accumulation rates in Northern Victoria Land (Antactica) by firn core analysis. Journal of glaciology, 46(155), 541–552.
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Saintenoy A.C. & Tarantola A. (2001). Ground-penetrating radar: Analysis of point diffractors for modeling and inversion. Geophysics, 66(2), 540–550.
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Boulinier, T., McCoy, K.D., Yoccoz, N.G., Gasparini, J. & Tveraa, T. (2008). Public information affects breeding dispersal in a colonial bird: kittiwakes cue on neighbours. Biol. Lett., 4, 538–540.
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Van De Vijver B., Denys L. & Beyens L. (2000). Fragilaria husvikensis sp. nov. (Bacillariophyceae), another Fragilaria species with transapical ribs from Subantarctica. Nova Hedwigia, , 537–550.
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Mardon, J Bonadonna, F. (2009). Behav. Ecol. Sociobiol. (Print), 63, 537–542.
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Duchamp C., Cohen Adad F., Rouanet J.L., Dumonteil E. & Barre H. (1993). Existence of nonshivering thermogenesis in birds. Life in the Cold:Ecological,Physiological,and Molecular Mechanis, , 529–533.
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Gay M., Fily M., Genthon C., Frezzotti M., Oerter H. & Winther J.G. (2002). Snow grain-size measurements in Antarctica. Journal of glaciology, 48(163), 527–535.
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Le Bohec C., Gauthier-Clerc M. & Le Maho Y. (2005). Animal behaviour, 70(3), 527–538.
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Van Roozendael M., Peeters P., Simon P.C., Roscoe H.K., Jones A., Bartlett L., Vaughan G. & Goutail Pommereau Kyro Walhstrom Braaathen. (1996). Absolute calibration of SAOZ measurements of ozone by comparison with Dodson and Brewer instruments. Bachelor's thesis, , .
Abstract: Proc. Third European Symp. on Polar Ozone
Programme: 209
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