The costs of living in a thermal fluctuating environment for the tropical haematophagous bug, Rhodnius prolixus
Environmental temperature is an abiotic factor with great influence on biological processes of living beings. Jensen's inequality states that for non-lineal processes, such as most biological phenomena, the effects of thermal fluctuations cannot be predicted from mean constant temperatures. We...
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2018
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03064565_v74_n_p92_Rolandi http://hdl.handle.net/20.500.12110/paper_03064565_v74_n_p92_Rolandi |
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paper:paper_03064565_v74_n_p92_Rolandi2023-06-08T15:31:23Z The costs of living in a thermal fluctuating environment for the tropical haematophagous bug, Rhodnius prolixus Chagas disease Constant temperature Fluctuating temperature Phenotypic plasticity Rhodnius prolixus Survival time adult adulthood animal experiment Article blood body mass body weight loss Chagas disease controlled study disease transmission ecophysiology egg embryo environmental temperature female fertility food intake gender insect bite insect development insect vector male nonhuman population growth Rhodnius prolixus survival animal growth, development and aging Rhodnius temperature tropic climate Animals Female Fertility Male Rhodnius Temperature Tropical Climate Environmental temperature is an abiotic factor with great influence on biological processes of living beings. Jensen's inequality states that for non-lineal processes, such as most biological phenomena, the effects of thermal fluctuations cannot be predicted from mean constant temperatures. We studied the effect of daily temperature fluctuation (DTF) on Rhodnius prolixus, a model organism in insect physiology, and an important vector of Chagas disease. We measured development time from egg to adult, fecundity, fertility, body mass reduction rate (indirect measurement of nutrient consumption rates) and survival after a single blood meal. Insects were reared at constant temperature (24 °C), or with a DTF (17–32 °C; mean = 24 °C). Taking into account Jensen's inequality as well as the species tropical distribution, we predict that living in a variable thermal environment will have higher costs than inhabiting a stable one. Development time and fertility were not affected by DTF. However, fecundity was lower in females reared at DTF than at constant temperature, and males had higher body mass reduction rate and lower survival in the DTF regime, suggesting higher costs associated to fluctuating thermal environments. At a population and epidemiological level, higher energetic costs would imply an increase in nutrient consumption rate, biting frequency, and, consequently increasing disease transmission from infected insects. On the contrary, lower fecundity could be associated with a decrease in population growth. This knowledge will not only provide basic information to the field of insect ecophysiology, but also could be a useful background to develop population and disease transmission models. © 2018 Elsevier Ltd 2018 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03064565_v74_n_p92_Rolandi http://hdl.handle.net/20.500.12110/paper_03064565_v74_n_p92_Rolandi |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Chagas disease Constant temperature Fluctuating temperature Phenotypic plasticity Rhodnius prolixus Survival time adult adulthood animal experiment Article blood body mass body weight loss Chagas disease controlled study disease transmission ecophysiology egg embryo environmental temperature female fertility food intake gender insect bite insect development insect vector male nonhuman population growth Rhodnius prolixus survival animal growth, development and aging Rhodnius temperature tropic climate Animals Female Fertility Male Rhodnius Temperature Tropical Climate |
| spellingShingle |
Chagas disease Constant temperature Fluctuating temperature Phenotypic plasticity Rhodnius prolixus Survival time adult adulthood animal experiment Article blood body mass body weight loss Chagas disease controlled study disease transmission ecophysiology egg embryo environmental temperature female fertility food intake gender insect bite insect development insect vector male nonhuman population growth Rhodnius prolixus survival animal growth, development and aging Rhodnius temperature tropic climate Animals Female Fertility Male Rhodnius Temperature Tropical Climate The costs of living in a thermal fluctuating environment for the tropical haematophagous bug, Rhodnius prolixus |
| topic_facet |
Chagas disease Constant temperature Fluctuating temperature Phenotypic plasticity Rhodnius prolixus Survival time adult adulthood animal experiment Article blood body mass body weight loss Chagas disease controlled study disease transmission ecophysiology egg embryo environmental temperature female fertility food intake gender insect bite insect development insect vector male nonhuman population growth Rhodnius prolixus survival animal growth, development and aging Rhodnius temperature tropic climate Animals Female Fertility Male Rhodnius Temperature Tropical Climate |
| description |
Environmental temperature is an abiotic factor with great influence on biological processes of living beings. Jensen's inequality states that for non-lineal processes, such as most biological phenomena, the effects of thermal fluctuations cannot be predicted from mean constant temperatures. We studied the effect of daily temperature fluctuation (DTF) on Rhodnius prolixus, a model organism in insect physiology, and an important vector of Chagas disease. We measured development time from egg to adult, fecundity, fertility, body mass reduction rate (indirect measurement of nutrient consumption rates) and survival after a single blood meal. Insects were reared at constant temperature (24 °C), or with a DTF (17–32 °C; mean = 24 °C). Taking into account Jensen's inequality as well as the species tropical distribution, we predict that living in a variable thermal environment will have higher costs than inhabiting a stable one. Development time and fertility were not affected by DTF. However, fecundity was lower in females reared at DTF than at constant temperature, and males had higher body mass reduction rate and lower survival in the DTF regime, suggesting higher costs associated to fluctuating thermal environments. At a population and epidemiological level, higher energetic costs would imply an increase in nutrient consumption rate, biting frequency, and, consequently increasing disease transmission from infected insects. On the contrary, lower fecundity could be associated with a decrease in population growth. This knowledge will not only provide basic information to the field of insect ecophysiology, but also could be a useful background to develop population and disease transmission models. © 2018 Elsevier Ltd |
| title |
The costs of living in a thermal fluctuating environment for the tropical haematophagous bug, Rhodnius prolixus |
| title_short |
The costs of living in a thermal fluctuating environment for the tropical haematophagous bug, Rhodnius prolixus |
| title_full |
The costs of living in a thermal fluctuating environment for the tropical haematophagous bug, Rhodnius prolixus |
| title_fullStr |
The costs of living in a thermal fluctuating environment for the tropical haematophagous bug, Rhodnius prolixus |
| title_full_unstemmed |
The costs of living in a thermal fluctuating environment for the tropical haematophagous bug, Rhodnius prolixus |
| title_sort |
costs of living in a thermal fluctuating environment for the tropical haematophagous bug, rhodnius prolixus |
| publishDate |
2018 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03064565_v74_n_p92_Rolandi http://hdl.handle.net/20.500.12110/paper_03064565_v74_n_p92_Rolandi |
| _version_ |
1768542841342001152 |