Circadian and circannual rhythms in air gulping behaviour of cave fish
作者:
J. Biswas,
A.K. Pati,
R.K. Pradhan,
期刊:
Journal of Interdisciplinary Cycle Research
(Taylor Available online 1990)
卷期:
Volume 21,
issue 4
页码: 257-268
ISSN:0022-1945
年代: 1990
DOI:10.1080/09291019009360086
出版商: Taylor & Francis Group
关键词: Air‐gulping behaviour;circadian rhythm;circannual rhythm;cavernicolous fish
数据来源: Taylor
摘要:
Study of the biological rhythms in cavernicoles is of considerable interest especially since the cave ecosystem is characterized by absence of light, relatively constant temperature and relatively high and constant humidity. The present paper documents for the first time multifrequency biologic rhythms in air gulping behaviour of a cavernicolous fishOreonectus evezardi,kept under complete darkness, DD. A circadian rhythm was demonstrated with statistical significance by cosinor method for air‐gulping activity during 9 months out of 14 months of observations. A 6‐monthly rhythm in circadian mesor was detected. However, statistically significant circannual rhythms in circadian amplitude and circadian acrophase were validated. Thus, results of the present study clearly demonstrate semicircannual or circannual modulation of the circadian behavioural rhythm of a cave dwelling teleost.
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