The adaptive value of hatching towards the end of the night: Lessons from eggs of the haematophagous bug Rhodnius prolixus

The daily hatching rhythm of Rhodnius prolixus eggs is established under an LD 12 : 12 h photoperiod. The endogenous nature of this rhythm is demonstrated under continuous darkness. Hatching takes place during the last half of the night, when the maximum environmental relative humidity (RH) and mini...

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Detalles Bibliográficos
Autores principales: Schilman, P.E., Minoli, S.A., Lazzari, C.R.
Formato: JOUR
Materias:
Daily rhythms
Hatching
Relative humidity
RH
Temperature
Water vapour saturation deficit
diurnal variation
egg
fitness
hatching
insect
light effect
photoperiod
preference behavior
relative humidity
temperature effect
Rhodnius
Rhodnius prolixus
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_03076962_v34_n3_p231_Schilman
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_03076962_v34_n3_p231_Schilman
record_format dspace
spelling todo:paper_03076962_v34_n3_p231_Schilman2023-10-03T15:22:42Z The adaptive value of hatching towards the end of the night: Lessons from eggs of the haematophagous bug Rhodnius prolixus Schilman, P.E. Minoli, S.A. Lazzari, C.R. Daily rhythms Hatching Relative humidity RH Temperature Water vapour saturation deficit diurnal variation egg fitness hatching insect light effect photoperiod preference behavior relative humidity temperature effect Rhodnius Rhodnius prolixus The daily hatching rhythm of Rhodnius prolixus eggs is established under an LD 12 : 12 h photoperiod. The endogenous nature of this rhythm is demonstrated under continuous darkness. Hatching takes place during the last half of the night, when the maximum environmental relative humidity (RH) and minimum temperature (i.e. the combination that yields the lower water vapour saturation deficits) occur in wild habitats. This temporal window of approximately 7 h recurs at 24-h intervals, producing a hatching rhythm in the population. The effects of the RH upon egg-hatching are analysed. In agreement with previous studies, hatching success is strongly affected by environmental RH. Although 88% of eggs hatch at 75% RH, only 4% and 10% hatch at 0% or 100% RH, respectively. These results support the hypothesis that temporal synchronization is related to the avoidance of low environmental RHs, high environmental temperatures, or high water vapour saturation deficit during hatching, thus minimizing their deleterious effects. Given that eggs cannot choose optimum microclimatic conditions, selective pressures appear to have originated from an adaptive temporal rather than spatial hygropreference. © 2009 The Royal Entomological Society. Fil:Schilman, P.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Minoli, S.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Lazzari, C.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03076962_v34_n3_p231_Schilman
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Daily rhythms
Hatching
Relative humidity
RH
Temperature
Water vapour saturation deficit
diurnal variation
egg
fitness
hatching
insect
light effect
photoperiod
preference behavior
relative humidity
temperature effect
Rhodnius
Rhodnius prolixus
spellingShingle Daily rhythms
Hatching
Relative humidity
RH
Temperature
Water vapour saturation deficit
diurnal variation
egg
fitness
hatching
insect
light effect
photoperiod
preference behavior
relative humidity
temperature effect
Rhodnius
Rhodnius prolixus
Schilman, P.E.
Minoli, S.A.
Lazzari, C.R.
The adaptive value of hatching towards the end of the night: Lessons from eggs of the haematophagous bug Rhodnius prolixus
topic_facet Daily rhythms
Hatching
Relative humidity
RH
Temperature
Water vapour saturation deficit
diurnal variation
egg
fitness
hatching
insect
light effect
photoperiod
preference behavior
relative humidity
temperature effect
Rhodnius
Rhodnius prolixus
description The daily hatching rhythm of Rhodnius prolixus eggs is established under an LD 12 : 12 h photoperiod. The endogenous nature of this rhythm is demonstrated under continuous darkness. Hatching takes place during the last half of the night, when the maximum environmental relative humidity (RH) and minimum temperature (i.e. the combination that yields the lower water vapour saturation deficits) occur in wild habitats. This temporal window of approximately 7 h recurs at 24-h intervals, producing a hatching rhythm in the population. The effects of the RH upon egg-hatching are analysed. In agreement with previous studies, hatching success is strongly affected by environmental RH. Although 88% of eggs hatch at 75% RH, only 4% and 10% hatch at 0% or 100% RH, respectively. These results support the hypothesis that temporal synchronization is related to the avoidance of low environmental RHs, high environmental temperatures, or high water vapour saturation deficit during hatching, thus minimizing their deleterious effects. Given that eggs cannot choose optimum microclimatic conditions, selective pressures appear to have originated from an adaptive temporal rather than spatial hygropreference. © 2009 The Royal Entomological Society.
format JOUR
author Schilman, P.E.
Minoli, S.A.
Lazzari, C.R.
author_facet Schilman, P.E.
Minoli, S.A.
Lazzari, C.R.
author_sort Schilman, P.E.
title The adaptive value of hatching towards the end of the night: Lessons from eggs of the haematophagous bug Rhodnius prolixus
title_short The adaptive value of hatching towards the end of the night: Lessons from eggs of the haematophagous bug Rhodnius prolixus
title_full The adaptive value of hatching towards the end of the night: Lessons from eggs of the haematophagous bug Rhodnius prolixus
title_fullStr The adaptive value of hatching towards the end of the night: Lessons from eggs of the haematophagous bug Rhodnius prolixus
title_full_unstemmed The adaptive value of hatching towards the end of the night: Lessons from eggs of the haematophagous bug Rhodnius prolixus
title_sort adaptive value of hatching towards the end of the night: lessons from eggs of the haematophagous bug rhodnius prolixus
url http://hdl.handle.net/20.500.12110/paper_03076962_v34_n3_p231_Schilman
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