Artículo de revista
Colder is better: The differential effects of thermal acclimation on life history parameters in a parasitoid fly
Fecha
2017Registro en:
Journal of Thermal Biology 68 (2017) 1–4
Autor
Zamorano, Jorge
Bozinovic, Francisco
Veloso Iriarte, Claudio
Institución
Resumen
In this article, we assessed the effect of the rearing temperature on life history traits of the poorly known fly
Phasmovora phasmophagae (Diptera: Tachinidae), a parasitoid of Agathemera crassa (Phasmatodea:
Agathemeridae) in order to: i) test the effect of ambient temperature on life history traits and ii) assess the
potential trade-off between reproduction and survival. Parasitoids were obtained from a population of hosts
located in the Andes range of central Chile. Upon emergence from the host parasitoids were randomly allocated
to three thermal treatments (15 °C, 22.5 °C and 30 °C) and several life history traits were measured. We recorded
higher survival at 15 °C and 22.5 °C and a lower survival at 30 °C.We found differences for both body mass and
head width among thermal treatments. In females, body mass was higher at 15 °C than at 30 °C. An effect of
breeding temperature and sex was observed only for developmental time. In addition, males reared at different
temperatures during the pupal stage and held as adults at 22.5 °C, exhibited no differences in longevity between
treatments. A significant effect of temperature on the mass of ovaries and lipid was recorded in females. These
patterns suggest a trade-off between reproduction and survival. Overall, data seem to support the “colder is
better” hypothesis, because Andean parasitoid P. phasmophagae inhabiting and experimentally reared in colder
environments have a higher performance in all environments.