Author
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Nakano S; Nakamura K; Abbas I
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著者
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中野 進・中村浩二・Abbas I
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Title
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Survivorship and fertility schedules of a Sumatran phytophagous lady
beetle, Epilachna enneasticta (Coleoptera, Coccinellidae) under laboratory
conditions
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タイトル
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スマトラ産食葉性テントウムシEpilachna
enneastictaの生存-繁殖スケジュール
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Keywords
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Coccinellidae, Epilachna enneasticta, phytophagous lady beetle,
survivorship and fertility schedules, West Sumatra, E.
vigintioctopunctata
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Abstract
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A Sumatran phytophagous lady beetle, Epilachna enneasticta was reared
under laboratory conditions in order to study its survivorship and
fertility schedules. E. enneasticta required 28.7 days for development of
the immature stages. The mean longevity of males (90.4 days) was longer
than that of females (71.4 days). The mean length of the pre-reproductive
period (30.1 days) was longer than that of the post-reproductive period
(2.4 days). Females laid eggs continuously at a rather constant rate
throughout their reproductive period and the average number of eggs
produced per female was 425.4. The intrinsic rate of natural increase r
was 0.070 per capita per day. E. enneasticta showed half to two-thirds of
the mean fecundity, twice the pre-reproductive period, and a lower
intrinsic rate of natural increase than three of its sympatric species in
Sumatra (E. vigintioctopunctata, E. septima, and E.
dodecastigma).
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要旨
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Journal
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Appl.Ent.Zool., 32(2), 1997, p.317-323.
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