Is the denser contour feather structure in pale grey than in pheomelanic brown tawny owls Strix aluco an adaptation to cold environments?

2015 ◽  
Vol 47 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Katja Koskenpato ◽  
Kari Ahola ◽  
Teuvo Karstinen ◽  
Patrik Karell
Keyword(s):  
Strix Aluco ◽  
Adaptation To Cold ◽  
Cold Environments ◽  
Contour Feather

Evaluation of different contour feather types for biomonitoring lead exposure in Northern goshawk (Accipiter gentilis) and tawny owl (Strix aluco)

2012 ◽  
Vol 85 ◽  
pp. 115-119 ◽  
Author(s):  
Sofía Debén ◽  
J. Ángel Fernández ◽  
Jesús R. Aboal ◽  
Alejo Carballeira
Keyword(s):  
Lead Exposure ◽  
Accipiter Gentilis ◽  
Tawny Owl ◽  
Northern Goshawk ◽  
Strix Aluco ◽  
Contour Feather

scholarly journals In vivo emergence of beige-like fat in chickens as physiological adaptation to cold environments

Amino Acids ◽  
2021 ◽  
Vol 53 (3) ◽  
pp. 381-393
Author(s):  
Rina Sotome ◽  
Akira Hirasawa ◽  
Motoi Kikusato ◽  
Taku Amo ◽  
Kyohei Furukawa ◽  
...  
Keyword(s):  
Adipose Tissue ◽  
Uncoupling Protein ◽  
Subcutaneous Fat ◽  
Morphological Characteristics ◽  
Physiological Adaptation ◽  
Voltage Dependent Anion Channel ◽  
Adaptation To Cold ◽  
Cold Environments ◽  
Beige Fat

AbstractWhile it has been hypothesized that brown adipocytes responsible for mammalian thermogenesis are absent in birds, the existence of beige fat has yet to be studied directly. The present study tests the hypothesis that beige fat emerges in birds as a mechanism of physiological adaptation to cold environments. Subcutaneous neck adipose tissue from cold-acclimated or triiodothyronine (T3)-treated chickens exhibited increases in the expression of avian uncoupling protein (avUCP, an ortholog of mammalian UCP2 and UCP3) gene and some known mammalian beige adipocyte-specific markers. Morphological characteristics of white adipose tissues of treated chickens showed increased numbers of both small and larger clusters of multilocular fat cells within the tissues. Increases in protein levels of avUCP and mitochondrial marker protein, voltage-dependent anion channel, and immunohistochemical analysis for subcutaneous neck fat revealed the presence of potentially thermogenic mitochondria-rich cells. This is the first evidence that the capacity for thermogenesis may be acquired by differentiating adipose tissue into beige-like fat for maintaining temperature homeostasis in the subcutaneous fat ‘neck warmer’ in chickens exposed to a cold environment.

The long-term effect of fitting back-mounted radio tags to juvenile tawny owls Strix aluco

2004 ◽  
Vol 10 (1) ◽  
pp. 161-170 ◽  
Author(s):  
Steve J. Petty ◽  
Bridget M. Appleby ◽  
Christopher F. Coles ◽  
Romain Julliard
Keyword(s):  
Term Effect ◽  
Strix Aluco ◽  
Long Term Effect

Premières données sur le régime alimentaire de la Chouette hulotte (Strix aluco mauritanica) en Algérie

1999 ◽  
Vol 25 (1) ◽  
pp. 111-123
Author(s):  
Watik Hamdine ◽  
Mohamed Boukhemza ◽  
Salaheddine Doumandji ◽  
Françoise Poitevin ◽  
Michel Thevenot
Keyword(s):  
Régime Alimentaire ◽  
Strix Aluco

PHYSIOLOGICAL MECHANISMS OF ADAPTATION TO COLD

2016 ◽  
Vol 50 (4) ◽  
pp. 5-13 ◽  
Author(s):  
M.M. Saltykova ◽  
Keyword(s):  
Physiological Mechanisms ◽  
Adaptation To Cold ◽  
Mechanisms Of Adaptation
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