Abstracts |
TITLE: SEASONAL VARIATIONS IN THE COLOR PATTERNS OF COCCINELLA SEPTEMPUNCTATA (COLEOPTERA: COCCINELLIDAE) IN NILGIRI HILLS. |
Author: M.Ramalinghan |
Journal, Bombay Natural History Society,Vol 83 (3),December 1988.Page no 551 |
Abstract
|
Abstract: The first report on the seasonal melanization in Coccinella septempunctata, found in Mel Hasahatty, Nilgiris, 2000 m above MSL is presented. It shows that there are two peaks of abundance, one extending from June to August and the other from October to February. Fifteen variations in the color patterns of the bivariate confusa weideman have been reported .The total melanies form about 6.05%, of the general population and the relative frequencies if different patterns of the melanies and non-melanies (typicals) are presented. It is found the present study that no single factors responsible for the increase in the incidence if melanics,but temperature, relatively humiduty and solar radiation have combined cumulative effect on the frequenciy of melanics.