Survival and molting incidence after heat and cold shocks in Panstrongylus megistus Burmeister
| Autor: | Antenor Nascimento Ferraz Filho, Maria Luiza S. Mello, Vera Lúcia Cortiço Corrêa Rodrigues, Nancy L. Garcia, Simone L. Garcia |
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| Rok vydání: | 1999 |
| Předmět: |
Microbiology (medical)
Male Nymph Thermal shock lcsh:Arctic medicine. Tropical medicine Hot Temperature lcsh:RC955-962 lcsh:QR1-502 Zoology Molting Panstrongylus megistus survival lcsh:Microbiology Triatoma infestans medicine Animals biology molting Ecology Incidence (epidemiology) Panstrongylus biology.organism_classification Temperature stress heat shock Cold Temperature cold shock Shock (circulatory) Female medicine.symptom Moulting |
| Zdroj: | Memórias do Instituto Oswaldo Cruz., Vol 94, Iss 1 (1999) Memórias do Instituto Oswaldo Cruz, Volume: 94, Issue: 1, Pages: 131-137, Published: JAN 1999 |
| ISSN: | 0074-0276 |
| Popis: | Survival and molting incidence were studied after heat (40 degrees C) and cold (0 degree C) shocks in specimens of Panstrongylus megistus with the aim of establishing its response to temperature stress under laboratory rearing conditions and to understand occasional changes in the biological characteristics of specimens captured in nature. The response to the thermal shocks was found to vary as a function of the temperature and duration of the shock, developmental phase and sex of the specimens, and in certain cases, the insect habit and nourishment conditions. P. megistus specimens were found to be less resistant to the heat shock assay than Triatoma infestans, another reduviid species. The short cold shock affected survival of P. megistus more than did the heat shock, survival of fully-nourished specimens being preferential. The response of adults to the short cold shock was affected by sex, males being generally less resistant. The insect sylvatic habit was found to seldom affect the thermal shock response established for specimens with domestic habit. A decrease in molting frequency and sometimes a slowdown of the molting rate were found after the short heat and cold shocks, possibly promoted by change in hormonal balance, and differing from patterns reported for T. infestans. The results indicate that no generalization should be made for different reduviid species in terms of the effects of temperature shocks. |
| Databáze: | OpenAIRE |
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