Relationship between mating success and wing length in a drosophilid: Phorticella striata
2008
Yenisetti, Sarat Chandra (Nagaland (Central) University, Nagaland, India), E-mail: yenisets@yahoo.co.in | Hegde, Sreedhara Narayana (Mysore University, Karnataka, India) | Venkateswarlu, Mididoddi (Kuvempu University, Karnataka, India)
Correlative studies were made between mating success and Ming length in a drosophilid insect Phorticella striata. Mating latency (time elapsed until mating from introduction) noted for all the matings. Observations were made for one hour considering number of pairs mated in every 15 minutes as one group. Mating latency of the flies gradually increased from 0-15 min to 45-60 min. Data showed that difference in mean number of flies mated during different time intervals was significant, but the difference was non-significant between age groups, suggesting age has no influence on mating latency. Males mating in the first fifteen minutes (0-15 min) time interval had significantly longer wings. In females also there was significant difference in wing length that mate in different time intervals. Females mating in the first thirty minutes (0-30 min) bear significantly longer wings when compared with those that mate during 31-60 min. This showed large flies mate early in both the sexes. Thus the present study shows a direct relationship between wing length and mating success. So there is sexual selection acting on body size.
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