Influence of temperature and humidity on the biology of Triatoma mexicana (Hemiptera: Reduviidae: Triatominae) under laboratory conditions
Several biological parameters related to the Triatoma mexicana life-cycle were evaluated in this study. Three cohorts were maintained under different combinations of temperature and relative humidity (RH): 25ºC/50% RH; 25ºC/75% RH; and 30ºC/75% RH. Observed hatching rates varied from 49-57.5% whereas the average time of hatching varied from 19.5-22.7 days. In the three cohorts studied, the mean time-lapse between presentation of the blood meal and the beginning of feeding was less than 5 min in all instars; the mean feeding time was longer than 10 min in all the instars; the post-feed defecation delay was over 10 min in all the instars. Less than 50% of nymphs in each cohort completed the cycle and the average time from 1st instar nymph to adult was more than 255 days for the three cohorts. The number of blood meals before molt at each nymphal instar varied from 1-9. Our results appear to indicate a lack of influence of temperature and RH on the biological parameters of T. mexicana that were studied, which could reflect the adaptation capacity of this species. We also conclude that T. mexicana can not be considered an effective transmitter of Trypanosoma cruzi to human populations in areas where this species is currently present.
Main Authors: | , , , , , , , |
---|---|
Format: | Digital revista |
Language: | English |
Published: |
Instituto Oswaldo Cruz, Ministério da Saúde
2008
|
Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762008000700015 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
id |
oai:scielo:S0074-02762008000700015 |
---|---|
record_format |
ojs |
spelling |
oai:scielo:S0074-027620080007000152008-12-02Influence of temperature and humidity on the biology of Triatoma mexicana (Hemiptera: Reduviidae: Triatominae) under laboratory conditionsMartínez-Ibarra,José AlejandroSalazar-Schettino,Paz MaríaSolorio-Cibrián,MiriamCabrera Bravo,MargaritaNovelo-López,MónicaVences,Mauro OmarMontes-Ochoa,Jazmín YeseniaNogueda-Torres,Benjamín Triatoma mexicana biology ethology laboratory conditions Several biological parameters related to the Triatoma mexicana life-cycle were evaluated in this study. Three cohorts were maintained under different combinations of temperature and relative humidity (RH): 25ºC/50% RH; 25ºC/75% RH; and 30ºC/75% RH. Observed hatching rates varied from 49-57.5% whereas the average time of hatching varied from 19.5-22.7 days. In the three cohorts studied, the mean time-lapse between presentation of the blood meal and the beginning of feeding was less than 5 min in all instars; the mean feeding time was longer than 10 min in all the instars; the post-feed defecation delay was over 10 min in all the instars. Less than 50% of nymphs in each cohort completed the cycle and the average time from 1st instar nymph to adult was more than 255 days for the three cohorts. The number of blood meals before molt at each nymphal instar varied from 1-9. Our results appear to indicate a lack of influence of temperature and RH on the biological parameters of T. mexicana that were studied, which could reflect the adaptation capacity of this species. We also conclude that T. mexicana can not be considered an effective transmitter of Trypanosoma cruzi to human populations in areas where this species is currently present.info:eu-repo/semantics/openAccessInstituto Oswaldo Cruz, Ministério da SaúdeMemórias do Instituto Oswaldo Cruz v.103 n.7 20082008-11-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762008000700015en10.1590/S0074-02762008000700015 |
institution |
SCIELO |
collection |
OJS |
country |
Brasil |
countrycode |
BR |
component |
Revista |
access |
En linea |
databasecode |
rev-scielo-br |
tag |
revista |
region |
America del Sur |
libraryname |
SciELO |
language |
English |
format |
Digital |
author |
Martínez-Ibarra,José Alejandro Salazar-Schettino,Paz María Solorio-Cibrián,Miriam Cabrera Bravo,Margarita Novelo-López,Mónica Vences,Mauro Omar Montes-Ochoa,Jazmín Yesenia Nogueda-Torres,Benjamín |
spellingShingle |
Martínez-Ibarra,José Alejandro Salazar-Schettino,Paz María Solorio-Cibrián,Miriam Cabrera Bravo,Margarita Novelo-López,Mónica Vences,Mauro Omar Montes-Ochoa,Jazmín Yesenia Nogueda-Torres,Benjamín Influence of temperature and humidity on the biology of Triatoma mexicana (Hemiptera: Reduviidae: Triatominae) under laboratory conditions |
author_facet |
Martínez-Ibarra,José Alejandro Salazar-Schettino,Paz María Solorio-Cibrián,Miriam Cabrera Bravo,Margarita Novelo-López,Mónica Vences,Mauro Omar Montes-Ochoa,Jazmín Yesenia Nogueda-Torres,Benjamín |
author_sort |
Martínez-Ibarra,José Alejandro |
title |
Influence of temperature and humidity on the biology of Triatoma mexicana (Hemiptera: Reduviidae: Triatominae) under laboratory conditions |
title_short |
Influence of temperature and humidity on the biology of Triatoma mexicana (Hemiptera: Reduviidae: Triatominae) under laboratory conditions |
title_full |
Influence of temperature and humidity on the biology of Triatoma mexicana (Hemiptera: Reduviidae: Triatominae) under laboratory conditions |
title_fullStr |
Influence of temperature and humidity on the biology of Triatoma mexicana (Hemiptera: Reduviidae: Triatominae) under laboratory conditions |
title_full_unstemmed |
Influence of temperature and humidity on the biology of Triatoma mexicana (Hemiptera: Reduviidae: Triatominae) under laboratory conditions |
title_sort |
influence of temperature and humidity on the biology of triatoma mexicana (hemiptera: reduviidae: triatominae) under laboratory conditions |
description |
Several biological parameters related to the Triatoma mexicana life-cycle were evaluated in this study. Three cohorts were maintained under different combinations of temperature and relative humidity (RH): 25ºC/50% RH; 25ºC/75% RH; and 30ºC/75% RH. Observed hatching rates varied from 49-57.5% whereas the average time of hatching varied from 19.5-22.7 days. In the three cohorts studied, the mean time-lapse between presentation of the blood meal and the beginning of feeding was less than 5 min in all instars; the mean feeding time was longer than 10 min in all the instars; the post-feed defecation delay was over 10 min in all the instars. Less than 50% of nymphs in each cohort completed the cycle and the average time from 1st instar nymph to adult was more than 255 days for the three cohorts. The number of blood meals before molt at each nymphal instar varied from 1-9. Our results appear to indicate a lack of influence of temperature and RH on the biological parameters of T. mexicana that were studied, which could reflect the adaptation capacity of this species. We also conclude that T. mexicana can not be considered an effective transmitter of Trypanosoma cruzi to human populations in areas where this species is currently present. |
publisher |
Instituto Oswaldo Cruz, Ministério da Saúde |
publishDate |
2008 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762008000700015 |
work_keys_str_mv |
AT martinezibarrajosealejandro influenceoftemperatureandhumidityonthebiologyoftriatomamexicanahemipterareduviidaetriatominaeunderlaboratoryconditions AT salazarschettinopazmaria influenceoftemperatureandhumidityonthebiologyoftriatomamexicanahemipterareduviidaetriatominaeunderlaboratoryconditions AT soloriocibrianmiriam influenceoftemperatureandhumidityonthebiologyoftriatomamexicanahemipterareduviidaetriatominaeunderlaboratoryconditions AT cabrerabravomargarita influenceoftemperatureandhumidityonthebiologyoftriatomamexicanahemipterareduviidaetriatominaeunderlaboratoryconditions AT novelolopezmonica influenceoftemperatureandhumidityonthebiologyoftriatomamexicanahemipterareduviidaetriatominaeunderlaboratoryconditions AT vencesmauroomar influenceoftemperatureandhumidityonthebiologyoftriatomamexicanahemipterareduviidaetriatominaeunderlaboratoryconditions AT montesochoajazminyesenia influenceoftemperatureandhumidityonthebiologyoftriatomamexicanahemipterareduviidaetriatominaeunderlaboratoryconditions AT noguedatorresbenjamin influenceoftemperatureandhumidityonthebiologyoftriatomamexicanahemipterareduviidaetriatominaeunderlaboratoryconditions |
_version_ |
1756383616607191040 |