Aggregated oviposition in Rhodnius prolixus, sensory cues and physiological consequences
Females of the haematophagous bug Rhodnius prolixus attach their eggs in clusters on substrates related to their hosts, such as nests or avian feathers. Because the hosts are an enormous food resource as well as potential predators, the choice of the site and pattern of oviposition could have an imp...
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00221910_v98_n_p74_Rolandi http://hdl.handle.net/20.500.12110/paper_00221910_v98_n_p74_Rolandi |
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paper:paper_00221910_v98_n_p74_Rolandi2023-06-08T14:47:19Z Aggregated oviposition in Rhodnius prolixus, sensory cues and physiological consequences Schilman, Pablo Ernesto Egg laying behavior Insect eggs Metabolic rate Open flow respirometry Water loss desiccation egg environmental conditions fitness hatching host insect oviposition physiology sensory system site selection trade-off Aves Hexapoda Rhodnius prolixus carbon dioxide water animal association chemotaxis egg laying embryo development female growth, development and aging metabolism ovum physiology Rhodnius scanning electron microscopy ultrastructure Animals Carbon Dioxide Chemotaxis Cues Embryonic Development Female Microscopy, Electron, Scanning Oviposition Ovum Rhodnius Water Females of the haematophagous bug Rhodnius prolixus attach their eggs in clusters on substrates related to their hosts, such as nests or avian feathers. Because the hosts are an enormous food resource as well as potential predators, the choice of the site and pattern of oviposition could have an important adaptive value. Here we investigated proximate and a potential ultimate cause of this aggregated pattern of laid eggs. First, we studied proximal causes by analyzing the use of chemical or physical cues associated with aggregated oviposition in R. prolixus. For all terrestrial organisms there is a trade-off between exchange of respiratory gases and water loss. Particularly, insect eggs are highly susceptible to this trade-off because they do not obtain water from the environment, hence our second objective is to study the possible mechanisms involved in dehydration resistance in this species. Therefore we examined the dynamics of change in CO 2 release rate (ṀCO 2 ), and water loss rate (ṀH 2 O) in relation to embryo development as energetic demands increase, and tested the energetic or hygric efficiency hypothesis as a potential ultimate cause of aggregated oviposition. This hypothesis states that grouped eggs consume less energy or lose less water than equal numbers of isolated eggs, the latter being more susceptible to dehydration. Results indicated the use of physical external cues such as dummy eggs or edges of the oviposition substrates, but we did not find any chemical cues associated with the aggregated pattern of oviposition. There are no energetic or hygric benefits associated with egg's aggregated pattern. However, when we analyzed the ṀCO 2 and ṀH 2 O change in relation to embryo development, we found a fairly constant and low ṀH 2 O albeit a clear increase in ṀCO 2 , suggesting a tightly control of egg's desiccation tolerance. This high resistance to desiccation coupled with a temporal strategy of hatching allows R. prolixus embryos to successfully develop and hatch under harsh environmental conditions. © 2016 Elsevier Ltd Fil:Schilman, P.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00221910_v98_n_p74_Rolandi http://hdl.handle.net/20.500.12110/paper_00221910_v98_n_p74_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 |
Egg laying behavior Insect eggs Metabolic rate Open flow respirometry Water loss desiccation egg environmental conditions fitness hatching host insect oviposition physiology sensory system site selection trade-off Aves Hexapoda Rhodnius prolixus carbon dioxide water animal association chemotaxis egg laying embryo development female growth, development and aging metabolism ovum physiology Rhodnius scanning electron microscopy ultrastructure Animals Carbon Dioxide Chemotaxis Cues Embryonic Development Female Microscopy, Electron, Scanning Oviposition Ovum Rhodnius Water |
| spellingShingle |
Egg laying behavior Insect eggs Metabolic rate Open flow respirometry Water loss desiccation egg environmental conditions fitness hatching host insect oviposition physiology sensory system site selection trade-off Aves Hexapoda Rhodnius prolixus carbon dioxide water animal association chemotaxis egg laying embryo development female growth, development and aging metabolism ovum physiology Rhodnius scanning electron microscopy ultrastructure Animals Carbon Dioxide Chemotaxis Cues Embryonic Development Female Microscopy, Electron, Scanning Oviposition Ovum Rhodnius Water Schilman, Pablo Ernesto Aggregated oviposition in Rhodnius prolixus, sensory cues and physiological consequences |
| topic_facet |
Egg laying behavior Insect eggs Metabolic rate Open flow respirometry Water loss desiccation egg environmental conditions fitness hatching host insect oviposition physiology sensory system site selection trade-off Aves Hexapoda Rhodnius prolixus carbon dioxide water animal association chemotaxis egg laying embryo development female growth, development and aging metabolism ovum physiology Rhodnius scanning electron microscopy ultrastructure Animals Carbon Dioxide Chemotaxis Cues Embryonic Development Female Microscopy, Electron, Scanning Oviposition Ovum Rhodnius Water |
| description |
Females of the haematophagous bug Rhodnius prolixus attach their eggs in clusters on substrates related to their hosts, such as nests or avian feathers. Because the hosts are an enormous food resource as well as potential predators, the choice of the site and pattern of oviposition could have an important adaptive value. Here we investigated proximate and a potential ultimate cause of this aggregated pattern of laid eggs. First, we studied proximal causes by analyzing the use of chemical or physical cues associated with aggregated oviposition in R. prolixus. For all terrestrial organisms there is a trade-off between exchange of respiratory gases and water loss. Particularly, insect eggs are highly susceptible to this trade-off because they do not obtain water from the environment, hence our second objective is to study the possible mechanisms involved in dehydration resistance in this species. Therefore we examined the dynamics of change in CO 2 release rate (ṀCO 2 ), and water loss rate (ṀH 2 O) in relation to embryo development as energetic demands increase, and tested the energetic or hygric efficiency hypothesis as a potential ultimate cause of aggregated oviposition. This hypothesis states that grouped eggs consume less energy or lose less water than equal numbers of isolated eggs, the latter being more susceptible to dehydration. Results indicated the use of physical external cues such as dummy eggs or edges of the oviposition substrates, but we did not find any chemical cues associated with the aggregated pattern of oviposition. There are no energetic or hygric benefits associated with egg's aggregated pattern. However, when we analyzed the ṀCO 2 and ṀH 2 O change in relation to embryo development, we found a fairly constant and low ṀH 2 O albeit a clear increase in ṀCO 2 , suggesting a tightly control of egg's desiccation tolerance. This high resistance to desiccation coupled with a temporal strategy of hatching allows R. prolixus embryos to successfully develop and hatch under harsh environmental conditions. © 2016 Elsevier Ltd |
| author |
Schilman, Pablo Ernesto |
| author_facet |
Schilman, Pablo Ernesto |
| author_sort |
Schilman, Pablo Ernesto |
| title |
Aggregated oviposition in Rhodnius prolixus, sensory cues and physiological consequences |
| title_short |
Aggregated oviposition in Rhodnius prolixus, sensory cues and physiological consequences |
| title_full |
Aggregated oviposition in Rhodnius prolixus, sensory cues and physiological consequences |
| title_fullStr |
Aggregated oviposition in Rhodnius prolixus, sensory cues and physiological consequences |
| title_full_unstemmed |
Aggregated oviposition in Rhodnius prolixus, sensory cues and physiological consequences |
| title_sort |
aggregated oviposition in rhodnius prolixus, sensory cues and physiological consequences |
| publishDate |
2017 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00221910_v98_n_p74_Rolandi http://hdl.handle.net/20.500.12110/paper_00221910_v98_n_p74_Rolandi |
| work_keys_str_mv |
AT schilmanpabloernesto aggregatedovipositioninrhodniusprolixussensorycuesandphysiologicalconsequences |
| _version_ |
1768546054324617216 |