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Abstract:

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.

Registro:

Documento: Artículo
Título:The adaptive value of hatching towards the end of the night: Lessons from eggs of the haematophagous bug Rhodnius prolixus
Autor:Schilman, P.E.; Minoli, S.A.; Lazzari, C.R.
Filiación:Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, C1428EHA Ciudad Autónoma de Buenos Aires, Argentina
Division of Biological Sciences, University of California, San Diego, CA, United States
Institut de Recherche sur la Biologie de l'Insecte, UMR CNRS 6035, Université François Rabelais, Tours, France
Palabras clave: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
Año:2009
Volumen:34
Número:3
Página de inicio:231
Página de fin:237
DOI: http://dx.doi.org/10.1111/j.1365-3032.2009.00679.x
Título revista:Physiological Entomology
Título revista abreviado:Physiol.Entomol.
ISSN:03076962
CODEN:PENTD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03076962_v34_n3_p231_Schilman

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Citas:

---------- APA ----------
Schilman, P.E., Minoli, S.A. & Lazzari, C.R. (2009) . The adaptive value of hatching towards the end of the night: Lessons from eggs of the haematophagous bug Rhodnius prolixus. Physiological Entomology, 34(3), 231-237.
http://dx.doi.org/10.1111/j.1365-3032.2009.00679.x
---------- CHICAGO ----------
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" . Physiological Entomology 34, no. 3 (2009) : 231-237.
http://dx.doi.org/10.1111/j.1365-3032.2009.00679.x
---------- MLA ----------
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" . Physiological Entomology, vol. 34, no. 3, 2009, pp. 231-237.
http://dx.doi.org/10.1111/j.1365-3032.2009.00679.x
---------- VANCOUVER ----------
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. Physiol.Entomol. 2009;34(3):231-237.
http://dx.doi.org/10.1111/j.1365-3032.2009.00679.x