Female terrestrial isopods, Porcellio laevis Latreille (Isopoda: Oniscidea) reduce brooding duration and fecundity in response to physical stress

Scott Kight, Meydar Nevo

Research output: Contribution to journalArticle

6 Scopus citations


Female Porcellio laevis (Isopoda: Oniscidea) brood eggs and young in ventral marsupial pouches, a reproductive strategy with pronounced physical and presumed fitness costs. This study examines the effect of physical stress on reproductive behavior. To induce excessive physical stress, gravid female P. laevis were subjected to five minutes of continuous locomotion daily throughout the brooding period. Stressed females exhibited significantly shorter brooding periods than controls. Although stressed and control groups did not differ in average body size, there was a strong trend of reduced fecundity in stressed females. These results indicate that female isopods modify critical elements of reproductive investment under conditions of physical stress.

Original languageEnglish
Pages (from-to)285-287
Number of pages3
JournalJournal of the Kansas Entomological Society
Issue number3
Publication statusPublished - Jul 2004



  • Isopoda
  • Parental care
  • Parental investment
  • Subsocial behavior

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