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  • Life history of the stonefly Isogenoides zionensis (Plecoptera:Perlodidae) from the San Miguel River, Colorado [Elektronski vir]
    Sandberg, John B. ; Stewart, Kenneth W.
    The detailed life history of a San Miguel River, Colorado, population of Isogenoides zionensis is reported. Adult emergence, determined from exuvial counts, and adult presence were synchronized over ... a 20-day period from late June to early July 1999. Sex ratio for 1999 adults was 1.85 male:1 female. Observed oviposition behavior involved undulating flights over the river, withfemales descending to the water surface to release eggs. Females emerge with eggs nearly mature and produce up to three egg masses with an average 499, 176, and 50 eggs, respectively. Captive-reared males and females lived anaverage of 7 and 8 days respectively. The approximate 8-month or longer egg diapause and growth of nymphs in the field, beginning in May the following year, resulted in a semivoltine life cycle.
    Vir: Illiesia [Elektronski vir] : international journal of stonefly research. - ISSN 1854-0392 (Vol. 1, no. 4, 4. apr. 2005, str. 21-32)
    Vrsta gradiva - e-članek
    Leto - 2005
    Jezik - angleški
    COBISS.SI-ID - 565237

    Povezava(-e):

    http://www2.pms-lj.si/illiesia/papers/Illiesia01-04.pdf
    Digitalna knjižnica Slovenije - dLib.si

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