ZIN Annual Reports - 1999
DEVELOPMENT

Valentin P. Semyanov & Nina P. Vagina
Zoological Institute, Russian Academy of Sciences, Universitetskaya nab., 1, St. Petersburg, 199034, Russia

TROPHIC DIAPAUSE: EFFECT ON FECUNDITY AND LONGEVITY OF HARMONIA SEDECIMNOTATA (FABR.) (COLEOPTERA, COCCINELLIDAE)

Adult H. sedecimnotata beetles possessed a well pronounced trophic diapause; no photoperiodic diapause was found. In contrast to constantly ovipositing females, a strong increase fecundity (93%) was found in females fed on aphids after a 30-day long trophic diapause. The state of the trophic diapause itself had a little affect on part of females (14%) longevity.