title: Circadian activity patterns, photoperiodic responses and population cycles in voles : II. Photoperiodic responses and population cycles.
authors.affiliation: Physiologische Ökologie, Zoologisches Institut der Universität Köln, Weyertal 119, D-5000, Köln 41, Federal Republic of Germany.
authors.forename: U
authors.initials: U
authors.lastname: Lehmann
authors.affiliation: Physiologische Ökologie, Zoologisches Institut der Universität Köln, Weyertal 119, D-5000, Köln 41, Federal Republic of Germany.
authors.forename: S
authors.initials: S
authors.lastname: Halle
keywords: Circadian system; Microtines; Photoperiodism; Population cycle; Reproduction