title: [Influence of photoperiod length on the mictic-female production rate in Notommata copeus Ehr. (Rotifera)].
abstract: In short-day conditions, the reproduction of N. copeus is parthenogenetic (no mictic females). The mictic females appear when the day-length exceeds 14 hrs (LD=14/10). Beyond this critical photoperiod, the mictic females rate increases up to a maximum of 60% at the 17/7 photoperiod.The reproduction rate does not vary with the day-length.The age of the parent females has no significant influence on the rate of mictic-female production.
authors.affiliation: Laboratoire de Génétique Evolutive et de Biométrie du C.N.R.S., Gif-sur-Yvette.
authors.forename: Roger
authors.initials: R
authors.lastname: Pourriot
authors.affiliation: Laboratoire de Génétique Evolutive et de Biométrie du C.N.R.S., Gif-sur-Yvette.|Departement de Biologie Animale, Université Claude Bernard, 43 boulevard du 11 novembre 1918, F-69621, Villeurbanne, France.
authors.forename: Pierre
authors.initials: P
authors.lastname: Clément