Journal Article
Capillary dilatation in response to hypoxia In the brain of a gobiid fish
Scheich, H., Honegger, H.W., Warrell, D.A. and Kennedy, G.
Record Number:
4488
Year:
1972
Journal:
Respiration Physiology
Pages:
87-95
Volume:
15
Abstract:
Abstract. Typhlogohius californiensis, a small fish living in tide pools, was exposed to 24-36 hr of hypoxia
and instantly fixed by deep freezing. In freeze dried brain sections of hypoxic fish the capillary diameter
increased 1.6 times and the y/, capillary area 2.4 times compared to normoxic controls. Since the average
distance between open capillaries stayed constant the diameter increase accounted for the increase of
capillary area. The fishes heart rate slows to 20% during hypoxia and does not overshoot on return to
normoxia. The opercular frequency drops to 45%. The capillary dilatation may be important in surviving
hypoxia and is discussed as an additional element of the diving response.
Times Cited:
1
Relevent Species: