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The impact of parasites in adult populations of zygoptera

Odonatologica, 1990-01, Vol.19 (3), p.223-233

ISSN: 0375-0183

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  • Title:
    The impact of parasites in adult populations of zygoptera
  • Author: Aabro, A
  • Subjects: Freshwater ; Odonata ; Zygoptera
  • Is Part Of: Odonatologica, 1990-01, Vol.19 (3), p.223-233
  • Description: Based on countings and mark-release-recapture experiments the effects of intestinal eugregarines and ectoparasitic water-mite larvae on zygopteran imagines were studied in habitats on the W coast of Norway. In Enallagma cyathigerum and Coenagrion hastulatum , the larval mites attach during emergence: imagines on their maiden flight revealed the highest numbers of attached mites; the figures appeared to decline in the course of adult life. Heavily loaded individuals disappeared during the prereproductive and the succeeding reproductive phase. Pyrrhosoma nymphula and Lestes sponsa on their maiden flight carried low numbers of mites; the infestation increased consequent on repetitive visits to the water for reproduction, and the number of mites tended to rise with increasing adult age. In all Zygoptera the load of gregarines increased with advancing adult age owing to recurrent ingestion of infective gregarine oocysts; the gregarines influence zygopteran longevity.
  • Publisher: Societas Internationalis Odonatologica
  • Language: English;Dutch
  • Identifier: ISSN: 0375-0183
  • Source: Alma/SFX Local Collection
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