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Synchronization of reproductive period among the two male forms and female of the damselfly Mnais pruinosa selys (Zygoptera: Calopterygidae)
Author(s) -
Nomakuchi Shintaro,
Higashi Kazunori,
Maeda Makoto
Publication year - 1988
Publication title -
ecological research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.628
H-Index - 68
eISSN - 1440-1703
pISSN - 0912-3814
DOI - 10.1007/bf02346931
Subject(s) - damselfly , longevity , biology , period (music) , fecundity , population , demography , reproductive season , odonata , ecology , zoology , survivorship curve , life span , reproduction , evolutionary biology , genetics , physics , sociology , acoustics
Abstract Ecological parameters in a population of Mnais pruinosa were investigated in a mountain stream. In the study area, there were two forms of male with regard to wing color, the orange‐winged male ( esakii ) and the hyaline‐winged male ( strigata ), and only one female form with hyaline wings. Emergence of adults began in late April, and the flying season ended in late June. The time after emergence was spent in maturation, and the insects began to mate when they reached maturity. Longevity of adults was 17.6 days for esakii males, 18.4 days for strigata males and 21.9 days for females. There was little difference in emergence time, maturation period, survivorship curve and longevity among the two male forms and female. In other words, the period for reproductive activities was perfectly coincident among them. The factors influencing the synchronization of emergence were discussed.