The Microclimate of Simulated Burrows of Bandicota Bengalensis (G. & H.) in Calcutta, India (Rodentia: Muridae)1

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Abstract
Diel and seasonal climatic changes were monitored in simulated burrows of Bandicota bengalensis (G. & H.) and at .6 m (2 feet) above ground level in Calcutta from March 1965 through February 1966. There were no marked differences in occupied and unoccupied burrows. The burrow microclimate was much more stable on a diel and seasonal basis than was the climate outside the burrows. The average relative humidity inside the burrows was 89% or greater during each month and, as a result, the average vapor pressure deficit inside the burrows never exceeded 6.4 mm of mercury during any month. Temperature was the microclimatic variable most subject to change. The monthly mean temperature in occupied burrows increased 14.6°C between January and June 1965. The possible deleterious effects of this temperature increase on the longevity of fleas inhabiting natural burrows is discussed.

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