title: Photoperiod and longevity in Anopheles crucians.
abstract: The effect of photoperiod on longevity of nondiapausing members of Anopheles crucians was evaluated in laboratory experiments. First-generation adults reared from field collections illustrated the same trends. Individuals reared and maintained under short photoperiod (either 8 h light:16 h dark or 11 h light:13 h dark) lived longer than did those reared and maintained under long photoperiod (either 16 h light:8 h dark or 15 h light:9 h dark). Analysis of covariance showed that the greater longevity of short-photoperiod mosquitoes was not caused by their larger average body size. Also, a paired t-test confirmed the effect of photoperiod, independent of body size, on longevity; in mosquitoes paired according to thorax length, short-photoperiod individuals lived longer than did long-photoperiod individuals of the same sex and cohort. The reason short-photoperiod mosquitoes of this species live longer is not known.
authors.affiliation: Department of Zoology, University of Florida, Gainesville 32611.
authors.forename: C A
authors.initials: CA
authors.lastname: Lanciani
mesh_terms: D000818:Animals; D000852:Anopheles / Q000502:physiology*; D008136:Longevity; D017440:Photoperiod; D013997:Time Factors