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Phenotypic variation in the breeding phenology of the woodlouse Armadillidium vulgare by J. M. Dangerfield; Mark Hassall is a Environmental Science article available to read on EtoBox.

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The breeding phenology of temperate wood-lice is strongly seasonal, the result of physiological constraints and precise environmental cues for reproduction. The adaptive value of such mechanisms is that the release of offspring coincides with favourable conditions for growth and survival (Willows 1984). We recorded the breeding phenology of Armadillidium vulgare (Latreille) on two grassland sites in Great Britain and found between-site and between-year variation in the onset of reproduction, the duration of reproductive activity, the release of offspring, the size of reproductive females and the number of broods per female. Between 82.7 and 97.7% of gravid females sampled were semelparous at 23 months, with the remainder iteroparous, producing a second brood after 35 months. On one site (Weeting Health) improved growth conditions during 1984 allowed some females (19.3% of gravid females sampled in that year) to produce a brood after 11 months. There was also an increase in the number of 3-year-old females found to be gravid. An experimental manipulation of the same habitat confirmed that such changes in life history tactics could be phenotypic responses. The observed phenotypic var

Who reads Phenotypic variation in the breeding phenology of the woodlouse Armadillidium vulgare?

Author

J. M. Dangerfield; Mark Hassall

Publisher

Springer-Verlag; Springer Verlag; Springer Science and Business Media LLC (ISSN 0029-8549)

Published

1992

Language

EN

Field

Environmental Science (Physical Sciences)