Abstract
Natural History Observations on Mass Congregation and Diapause Behaviour of Pre-Migratory Roosting Danainae (Lepidoptera: Nymphalidae) From Sahyadri Mountains, India
Highlights
Migration is an evolved response towards spatiotemporal heterogeneity of environment (Ramenofsky and Wingfield, 2007; Roff and Fairbairn, 2007; Gotthard, 2008). It is a mass movement of individuals in a same direction along with simultaneous occurrences of both the sexes, which falls with internal inhibitory responses (Shields, 1974; Dingle and Drake, 2007)
Study Area The study was conducted in a small village Gothos (16°02’23.40”N, 73°49’59.82”E, elevation- 107.89m above msl and 36.6km radial distance from the West coast of India), Sindhudurg District of Maharashtra State. It is a westerly-faced amphitheater of hills in the Sahyadri Mountains occupied with two distinct forest types; the lower moist deciduous type and the upper semi-evergreen type (Figure 1)
The stage of reproductive diapause was confirmed by lack of mature eggs, lack of ovarian activity and presence of huge mass of reserved fat in abdominal cavity (Orr, 1992; Canzano et al, 2003)
Summary
Migration is an evolved response towards spatiotemporal heterogeneity of environment (Ramenofsky and Wingfield, 2007; Roff and Fairbairn, 2007; Gotthard, 2008). It is a mass movement of individuals in a same direction along with simultaneous occurrences of both the sexes, which falls with internal inhibitory responses (Shields, 1974; Dingle and Drake, 2007). Non-migratory summer population and the migratory winter population. The former cohort lives around two to January 2016 | Volume 4 | Issue 1 | Page 25
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