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Early mortality surge in protein-deprived females causes reversal of sex differential of life expectancy in Mediterranean fruit flies

Tipo de material: Artículo impreso(a) y electrónico Artículo impreso(a) y electrónico Idioma: Inglés Tema(s) en español: Tema(s) en inglés: Clasificación:
  • AR/632.774 E2
Recurso en línea: Formatos físicos adicionales disponibles:
  • Disponible en línea
 En: Proceedings of the National Academy of Sciences volumen 94, (March 1997), páginas 2762-2765Nota de acceso: Disponible para usuarios de ECOSUR con su clave de acceso Resumen:
Inglés

Experiments based on over 400,000 medflies revealed that females maintained on a normal diet (sucrose plus protein) have a higher life expectancy than males maintained on a normal diet, with a difference of 1.30 +/- 0.27 days in favor of females. However, this sex differential reverses under protein deprivation, with a difference of 2.24 +/- 0.18 days in favor of males. The reversal of the male-female life expectancy differential is caused by a sustained surge in early female mortality under protein deprivation that is tied to egg-laying and physiological processes. In contrast, male mortality and life expectancy are only mildly affected by protein deprivation. The surge in early mortality for female medfly cohorts is an instance of a vulnerable period. These vulnerable periods are linked with patterns in hazard rates.

Número de sistema: 19620
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Tipo de ítem Biblioteca actual Colección Signatura topográfica Info Vol Estado Código de barras
Artículos Biblioteca Electrónica Recursos en línea (RE) ECOSUR Recurso digital ECO400196203878
Artículos Biblioteca San Cristóbal Artículos (AR) ECOSUR AR 632.774 E2 001 Disponible SER000968
Artículos Biblioteca San Cristóbal Artículos (AR) ECOSUR AR 632.774 E2/EJ. 2 002 Disponible SER000977
Artículos Biblioteca Tapachula Artículos (AR) ECOSUR AR 632.774 E2 003 Disponible ECO020010321

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Experiments based on over 400,000 medflies revealed that females maintained on a normal diet (sucrose plus protein) have a higher life expectancy than males maintained on a normal diet, with a difference of 1.30 +/- 0.27 days in favor of females. However, this sex differential reverses under protein deprivation, with a difference of 2.24 +/- 0.18 days in favor of males. The reversal of the male-female life expectancy differential is caused by a sustained surge in early female mortality under protein deprivation that is tied to egg-laying and physiological processes. In contrast, male mortality and life expectancy are only mildly affected by protein deprivation. The surge in early mortality for female medfly cohorts is an instance of a vulnerable period. These vulnerable periods are linked with patterns in hazard rates. Inglés

Disponible en línea

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