The effect of temperature on the behaviour and development of Triatoma brasiliensis

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. bra...

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Autores principales:	Guarneri, A.A., Lazzari, C., Xavier, A.A.P., Diotaiuti, L., Lorenzo, M.G.
Formato:	JOUR
Materias:	Behaviour Chagas vectors Microclimate Temperature Triatoma behavior hatching larval development microclimate temperature effect Arthropoda Hemiptera Hexapoda Insecta Invertebrata Reduviidae Triatoma brasiliensis
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_03076962_v28_n3_p185_Guarneri
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_03076962_v28_n3_p185_Guarneri
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spelling	todo:paper_03076962_v28_n3_p185_Guarneri2023-10-03T15:22:41Z The effect of temperature on the behaviour and development of Triatoma brasiliensis Guarneri, A.A. Lazzari, C. Xavier, A.A.P. Diotaiuti, L. Lorenzo, M.G. Behaviour Chagas vectors Microclimate Temperature Triatoma behavior hatching larval development microclimate temperature effect Arthropoda Hemiptera Hexapoda Insecta Invertebrata Reduviidae Triatoma Triatoma brasiliensis 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03076962_v28_n3_p185_Guarneri
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Behaviour Chagas vectors Microclimate Temperature Triatoma behavior hatching larval development microclimate temperature effect Arthropoda Hemiptera Hexapoda Insecta Invertebrata Reduviidae Triatoma Triatoma brasiliensis
spellingShingle	Behaviour Chagas vectors Microclimate Temperature Triatoma behavior hatching larval development microclimate temperature effect Arthropoda Hemiptera Hexapoda Insecta Invertebrata Reduviidae Triatoma Triatoma brasiliensis 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
topic_facet	Behaviour Chagas vectors Microclimate Temperature Triatoma behavior hatching larval development microclimate temperature effect Arthropoda Hemiptera Hexapoda Insecta Invertebrata Reduviidae Triatoma Triatoma brasiliensis
description	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.
format	JOUR
author	Guarneri, A.A. Lazzari, C. Xavier, A.A.P. Diotaiuti, L. Lorenzo, M.G.
author_facet	Guarneri, A.A. Lazzari, C. Xavier, A.A.P. Diotaiuti, L. Lorenzo, M.G.
author_sort	Guarneri, A.A.
title	The effect of temperature on the behaviour and development of Triatoma brasiliensis
title_short	The effect of temperature on the behaviour and development of Triatoma brasiliensis
title_full	The effect of temperature on the behaviour and development of Triatoma brasiliensis
title_fullStr	The effect of temperature on the behaviour and development of Triatoma brasiliensis
title_full_unstemmed	The effect of temperature on the behaviour and development of Triatoma brasiliensis
title_sort	effect of temperature on the behaviour and development of triatoma brasiliensis
url	http://hdl.handle.net/20.500.12110/paper_03076962_v28_n3_p185_Guarneri
work_keys_str_mv	AT guarneriaa theeffectoftemperatureonthebehaviouranddevelopmentoftriatomabrasiliensis AT lazzaric theeffectoftemperatureonthebehaviouranddevelopmentoftriatomabrasiliensis AT xavieraap theeffectoftemperatureonthebehaviouranddevelopmentoftriatomabrasiliensis AT diotaiutil theeffectoftemperatureonthebehaviouranddevelopmentoftriatomabrasiliensis AT lorenzomg theeffectoftemperatureonthebehaviouranddevelopmentoftriatomabrasiliensis AT guarneriaa effectoftemperatureonthebehaviouranddevelopmentoftriatomabrasiliensis AT lazzaric effectoftemperatureonthebehaviouranddevelopmentoftriatomabrasiliensis AT xavieraap effectoftemperatureonthebehaviouranddevelopmentoftriatomabrasiliensis AT diotaiutil effectoftemperatureonthebehaviouranddevelopmentoftriatomabrasiliensis AT lorenzomg effectoftemperatureonthebehaviouranddevelopmentoftriatomabrasiliensis
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The effect of temperature on the behaviour and development of Triatoma brasiliensis

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