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Abstract:

The effects of temperature on the development of early stages and the thermopreference of nymphs and adults were analysed in the haematophagous bug Triatoma brasiliensis Neiva, 1911 (Hemiptera, Reduviidae). Egg hatching, mortality of nymphs, feeding and moulting success of the early stages of T. brasiliensis were all affected by temperature. While high rates of egg hatching were observed between 25 and 27°C, no hatching occurred at 12, 19 and 38°C. The mortality of first-instar nymphs was highest at 38°C, at which no insects survived after 10 days of exposure. Feeding success was only affected at the lowest temperature (12°C). No ecdysis was observed in the groups exposed to 12, 19 and 21°C. Recently fed fourth-instar nymphs preferred to stay at a temperature of approximately 30°C. The preferred temperature began to decline gradually to approximately 27°C during ecdysis, reaching 26°C at 30 days after ecdysis. After a second blood meal, the insects' preferred temperature was again approximately 30°C. The thermopreference pattern of females was similar to that of nymphs. Nymphs and females showed a daily fluctuation in their preferred temperature, moving towards higher values at the beginning of the dark phase, and choosing lower ones after this time interval, at which they remained until the end of the light phase. The females laid their eggs in all sectors of the arena, although the largest numbers of eggs were found between 28 and 32°C.

Registro:

Documento: Artículo
Título:The effect of temperature on the behaviour and development of Triatoma brasiliensis
Autor:Guarneri, A.A.; Lazzari, C.; Xavier, A.A.P.; Diotaiuti, L.; Lorenzo, M.G.
Filiación:Ctro. de Pesq. René Rachou, FIOCRUZ, Belo Horizonte, MG, Brazil
Depto. de Biodiversidad y Biol. Exp., Fac. de Cie. Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
Ctro. de Pesq. René Rachou, FIOCRUZ, Avenue Augusto de Lima, 1715, CEP 30190-002, Belo Horizonte, MG, Brazil
Palabras clave:Behaviour; Chagas vectors; Microclimate; Temperature; Triatoma; behavior; hatching; larval development; microclimate; temperature effect; Arthropoda; Hemiptera; Hexapoda; Insecta; Invertebrata; Reduviidae; Triatoma; Triatoma brasiliensis
Año:2003
Volumen:28
Número:3
Página de inicio:185
Página de fin:191
DOI: http://dx.doi.org/10.1046/j.1365-3032.2003.00330.x
Título revista:Physiological Entomology
Título revista abreviado:Physiol.Entomol.
ISSN:03076962
CODEN:PENTD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03076962_v28_n3_p185_Guarneri

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Citas:

---------- APA ----------
Guarneri, A.A., Lazzari, C., Xavier, A.A.P., Diotaiuti, L. & Lorenzo, M.G. (2003) . The effect of temperature on the behaviour and development of Triatoma brasiliensis. Physiological Entomology, 28(3), 185-191.
http://dx.doi.org/10.1046/j.1365-3032.2003.00330.x
---------- CHICAGO ----------
Guarneri, A.A., Lazzari, C., Xavier, A.A.P., Diotaiuti, L., Lorenzo, M.G. "The effect of temperature on the behaviour and development of Triatoma brasiliensis" . Physiological Entomology 28, no. 3 (2003) : 185-191.
http://dx.doi.org/10.1046/j.1365-3032.2003.00330.x
---------- MLA ----------
Guarneri, A.A., Lazzari, C., Xavier, A.A.P., Diotaiuti, L., Lorenzo, M.G. "The effect of temperature on the behaviour and development of Triatoma brasiliensis" . Physiological Entomology, vol. 28, no. 3, 2003, pp. 185-191.
http://dx.doi.org/10.1046/j.1365-3032.2003.00330.x
---------- VANCOUVER ----------
Guarneri, A.A., Lazzari, C., Xavier, A.A.P., Diotaiuti, L., Lorenzo, M.G. The effect of temperature on the behaviour and development of Triatoma brasiliensis. Physiol.Entomol. 2003;28(3):185-191.
http://dx.doi.org/10.1046/j.1365-3032.2003.00330.x