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Thromb Haemost 1979; 42(03): 959-964
DOI: 10.1055/s-0038-1656986
Original Article
Schattauer GmbH Stuttgart

Comparative Studies of Blood Coagulation in Hibernating and Non-Hibernating Frogs (Rana tigrina)

Nasreen Ahmad
The Department of Pathology, Institute of Medical Sciences, and Department of Zoology, Banaras Hindu University, Varanasi-221005 (India)
,
B Dube
The Department of Pathology, Institute of Medical Sciences, and Department of Zoology, Banaras Hindu University, Varanasi-221005 (India)
,
G P Agarwal
The Department of Pathology, Institute of Medical Sciences, and Department of Zoology, Banaras Hindu University, Varanasi-221005 (India)
,
Rama Kanta Dube
The Department of Pathology, Institute of Medical Sciences, and Department of Zoology, Banaras Hindu University, Varanasi-221005 (India)
› Author Affiliations
Further Information

Publication History

Received 05 November 1977

Accepted 06 November 1978

Publication Date:
23 August 2018 (online)

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Summary

1. During hibernation in frogs (Rana tigrina) there occurs prolongation of several clotting tests, viz, whole blood clotting time, plasma recalcification time, cephalin time and prothrombin time.

2. The ambient body temperature of the frog during winter hibernation is low and the retarded blood clotting at lower temperature may play an important protective role against intravascular thrombosis.

3. Shorter plasma recalcification time in low-spun plasma as compared to high-spun plasma indicated the presence of procoagulant activity in platelets/leucocytes of frogs.

 

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