scholarly journals Modulation of heart rate response to acute stressors throughout the breeding season in the king penguin Aptenodytes patagonicus

2015 ◽  
Vol 218 (11) ◽  
pp. 1686-1692 ◽  
Author(s):  
V. A. Viblanc ◽  
A. D. Smith ◽  
B. Gineste ◽  
M. Kauffmann ◽  
R. Groscolas
Keyword(s):  
Heart Rate ◽  
Breeding Season ◽  
Heart Rate Response ◽  
King Penguin ◽  
Aptenodytes Patagonicus

scholarly journals Tipping back the balance: recolonization of the Macquarie Island isthmus by king penguins (Aptenodytes patagonicus) following extermination for human gain

2009 ◽  
Vol 21 (3) ◽  
pp. 237-241 ◽  
Author(s):  
John van den Hoff ◽  
Clive R. McMahon ◽  
Iain Field
Keyword(s):  
Breeding Season ◽  
Breeding Population ◽  
Egg Laying ◽  
King Penguin ◽  
Breeding Sites ◽  
Macquarie Island ◽  
Aptenodytes Patagonicus ◽  
Breeding Behaviour ◽  
Temporal Discontinuity

AbstractDuring the late 19th and early 20th centuries, when blubber oil fuelled house lamps, the king penguin population at Macquarie Island was reduced from two very large (perhaps hundreds of thousands of birds) colonies to about 3000 birds. One colony, located on the isthmus when the island was discovered in 1810, was extinct by 1894 and it took about 100 years for king penguins to re-establish a viable breeding population there. Here we document this recovery. The first eggs laid at Gadget Gully on the isthmus were recorded in late February 1995 but in subsequent years egg laying took place earlier between November and February (this temporal discontinuity is a consequence of king penguin breeding behaviour). The first chick was hatched in April 1995 but the first fledging was not raised until the following breeding season in October 1996. The colony increased on average 66% per annum in the five years between 1995 and 2000. King penguins appear resilient to catastrophic population reductions, and as the island's population increases, it is likely that other previously abandoned breeding sites will be reoccupied.

The discriminative control of a conditioned heart rate response.

1957 ◽  
Author(s):  
Philip J. Bersh ◽  
Joseph M. Notterman ◽  
William N. Schoenfeld
Keyword(s):  
Heart Rate ◽  
Heart Rate Response ◽  
Discriminative Control ◽  
Conditioned Heart Rate

Effect of human galanin on the response of circulating catecholamines to hypoglycemia in man

1995 ◽  
Vol 133 (6) ◽  
pp. 723-728 ◽  
Author(s):  
Ettore C degli Uberti ◽  
Maria R Ambrosio ◽  
Marta Bondanelli ◽  
Giorgio Transforini ◽  
Alberto Valentini ◽  
...  
Keyword(s):  
Heart Rate ◽  
Healthy Subjects ◽  
Sympathetic Nerve Activity ◽  
Heart Rate Response ◽  
Statistical Significance ◽  
Inhibitory Effect ◽  
Amino Acid Residues ◽  
Nerve Activity ◽  
Receptor Stimulation

degli Uberti EC, Ambrosio MR, Bondanelli M, Trasforini G, Valentini A, Rossi R, Margutti A, Campo M. Effect of human galanin on the response of circulating catecholamines to hypoglycemia in man. Eur J Endocrinol 1995;133:723–8. ISSN 0804–4643 Human galanin (hGAL) is a neuropeptide with 30 amino acid residues that has been found in the peripheral and central nervous system, where it often co-exists with catecholamines. In order to clarify the possible role of hGAL in the regulation of sympathoadrenomedullary function, the effect of a 60 min infusion of hGAL (80 pmol·kg−1 · min−1) on plasma epinephrine and norepinephrine responses to insulin-induced hypoglycemia in nine healthy subjects was investigated. Human GAL administration significantly reduced both the release of basal norepinephrine and the response to insulin-induced hypoglycemia, whereas it attenuated the epinephrine response by 26%, with the hGAL-induced decrease in epinephrine release failing to achieve statistical significance. Human GAL significantly increased the heart rate in resting conditions and clearly exaggerated the heart rate response to insulin-induced hypoglycemia, whereas it had no effect on the blood pressure. We conclude that GAL receptor stimulation exerts an inhibitory effect on basal and insulin-induced hypoglycemia-stimulated release of norepinephrine. These findings provide further evidence that GAL may modulate sympathetic nerve activity in man but that it does not play an important role in the regulation of adrenal medullary function. Ettore C degli Uberti, Chair of Endocrinology, University of Ferrara, Via Savonarola 9, I-44100 Ferrara, Italy

scholarly journals Genetic and Environmental Sources of Variation in Heart Rate Response to Infused Nicotine in Twins

2007 ◽  
Vol 16 (6) ◽  
pp. 1057-1064 ◽  
Author(s):  
Gary E. Swan ◽  
Christina N. Lessov-Schlaggar ◽  
Ruth E. Krasnow ◽  
Kirk C. Wilhelmsen ◽  
Peyton Jacob ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Response ◽  
Sources Of Variation

Heart rate response to egg rotation in the domestic fowl embryo

1979 ◽  
Vol 20 (3) ◽  
pp. 247-254 ◽  
Author(s):  
Margaret A. Vince ◽  
J. V. Clarke ◽  
Margaret R. Reader
Keyword(s):  
Heart Rate ◽  
Domestic Fowl ◽  
Heart Rate Response
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