Respiratory metabolism of Hydromedion sparsutum and Perimylops antarcticus (Col., Perimylopidae) from South Georgia

Polar Biology ◽  
1989 ◽  
Vol 10 (2) ◽  
Author(s):  
L. S�mme ◽  
R.A. Ring ◽  
W. Block ◽  
M.R. Worland
2020 ◽  
Author(s):  
Jaume Orta ◽  
Ernest Garcia ◽  
David Christie ◽  
Francesc Jutglar ◽  
Guy M. Kirwan
Keyword(s):  

2019 ◽  
Author(s):  
Ian W.D. Dalziel ◽  
◽  
Robert Smalley ◽  
Lawrence A. Lawver ◽  
Demian Gomez ◽  
...  

Oikos ◽  
1982 ◽  
Vol 39 (2) ◽  
pp. 137 ◽  
Author(s):  
Mogens G. Nielsen ◽  
Torben F. Jensen ◽  
Ib Holm-Jensen

1957 ◽  
Vol 190 (3) ◽  
pp. 425-428 ◽  
Author(s):  
Richard M. Hoar ◽  
William C. Young

Oxygen consumption and heart rate during pregnancy were measured in untreated, thyroxin-injected and thyroidectomized guinea pigs given I131. From impregnation until parturition, oxygen consumption increased 7.9% in untreated females. The increase continued until 5 days postpartum when a sharp decrease occurred. The increase is not accounted for by growth of the fetal mass. Comparable increases occurred in thyroxin-injected (16.2%) and thyroidectomized (11.9%) females, although the levels throughout were higher and lower, respectively, than in intact females. Heart rate did not increase. On the contrary, statistically significant decreases occurred in the untreated and thyroxin-injected females. Although the mechanism associated with the increased metabolic rate is not known, the possibility of thyroid participation would seem to be excluded. Involvement of the adrenal cortex is suggested by morphological differences in the cells of the zona fasciculata in pregnant and nonpregnant females and by evidence cited from other studies.


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