Senescent Decline in Flour Beetle Strains Selected for Early Adult Fitness

Mertz, David B.

doi:10.1086/physzool.48.1.30155634

Cited by 99 publications

(60 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Higher survival rates of virgins relative to non-virgins have been reported in other insect studies including those on Drosophila (Fowler and Partridge, 1989;Smith, 1958); the housefly Musca domestica (Ragland and Sohal, 1973); the bruchiid beetle Callosobruchus maculatus (Tatar et al, 1994); the tribolium beetle Tribolium castaneum (Sonleitner, 1961, Mertz, 1975; grasshoppers, Melanoplus spp. (Dean, 1981); the bug Dysdercus fasciatus (Clarke and Sardesai, 1959); the leaf miner Agromyza frontella (Quiring and McNeil, 1984); the apple maggot fly Rhagoletis pomonella (Roitberg, 1989); and the moth Ephestia kuhniella (Norris, 1933).…”

Section: Discussionmentioning

confidence: 74%

A mortality cost of virginity at older ages in female Mediterranean fruit flies

Carey

Liedo

Harshman

et al. 2002

Experimental Gerontology

View full text Add to dashboard Cite

Mortality rates were measured over the lifetime of 65,000 female Mediterranean fruit flies, Ceratitis capitata, maintained in either all-female (virgin) cages or cages with equal initial numbers of males, to determine the effect of sexual activity and mating on the mortality trajectory of females at older ages. Although a greater fraction of females maintained in all-female (virgin) cages survived to older ages, the life expectancy of the surviving virgins was less than the life expectancy of surviving nonvirgins at older ages. This was due to a mortality crossover where virgin flies experience lower mortality than mated flies from eclosion to Day 20 but higher mortality thereafter. These results suggest that there are two consequences of mating-a short-term mortality increase (cost) and a longer term mortality decrease (benefit).

show abstract

Section: Discussionmentioning

confidence: 74%

A mortality cost of virginity at older ages in female Mediterranean fruit flies

Carey

Liedo

Harshman

et al. 2002

Experimental Gerontology

View full text Add to dashboard Cite

show abstract

“…Selection for high fecundity at early ages in Tribolium correlates with a reduction in adult life span (Mertz, 1975;Sokal, 1970). Conversely, selection for high fertility at later ages results in increased longevity and reduced early fecundity Rose and Charlesworth, 1981;Wattiaux, 1968aWattiaux, , 1968b.…”

Section: Introductionmentioning

confidence: 99%

Interactions between injury, stress resistance, reproduction, and aging in Drosophila melanogaster

Sepúlveda

Shojaeian

Rauser

et al. 2008

Experimental Gerontology

View full text Add to dashboard Cite

SummaryAn important aspect of the aging process in Drosophila melanogaster is the natural loss of antennae, legs, bristles, and parts of wings with age. These injuries lead to a loss of hemolymph, which contains water and nutrients. Stress-resistant lines of D. melanogaster are sometimes longer-lived than the populations from which they are derived. One hypothesis tested here is that increased stress resistance fosters longevity because it allows fruit flies to cope with the loss of hemolymph due to injury to the aging fly. We tested the effects of surgically induced injury on the aging and reproduction of five replicate populations. We then tested the effects of injury on populations that had been selected for different levels of stress resistance and on control populations. Injury affected aging more in males than in females, in part because of a counter-balancing reduction in female reproduction brought about by injury. More specifically, injury reduced female fecundity and male virility. Injury significantly reduced the starvation resistance in some groups of flies, but not in others. These findings undermine any simple interpretation of the interactions between injury, reproduction, and aging based on stress resistance. But they do indicate the existence of significant interactions between these biological processes, interactions that should be resolved in greater mechanistic detail than has been managed here. §To whom all correspondence and queries should be addressed:

show abstract

“…Sokal (1970) and Mertz (1975) selected for high fecundity at early ages in Tribolium. They obtained a correlated reduction in adult life span, although results were not consistent across replicates in either experiment.…”

Section: Introductionmentioning

confidence: 99%

Resistance to Environmental Stress in Drosophila melanogaster Selected for Postponed Senescence

Service,

Hutchinson,

MacKinley

et al. 1985

Physiological Zoology

299

View full text Add to dashboard Cite

Adult Drosophila melanogaster from populations that exhibit postponed senescence were compared to flies from control populations. Male and female flies from populations displaying postponed senescence were significantly more resistant than control flies to desiccation, starvation, and the vapor of a 15% ethanol solution. In the presence of desiccant or when humidity was not controlled, flies from postponedsenescence populations were more resistant than controls to heat stress in the range 37-39 C. Differences in heat tolerance disappeared when experiments were conducted at high humidity. Tolerance to starvation increased with age for females but remained approximately constant for males. Tolerance to desiccation decreased with age for both sexes. Differences between control and postponed-senescence populations with respect to starvation resistance and desiccation resistance were obtained at all ages examined. Females from postponed-senescence populations had lower proportional water content than did females from control populations. Differences in water content cannot explain the greater desiccation resistance of flies from postponedsenescence populations. Genetically increased life span in these D. melanogaster populations appears to result proximally from greater resistance to mortality arising from environmental stress.

show abstract

Senescent Decline in Flour Beetle Strains Selected for Early Adult Fitness

Cited by 99 publications

References 26 publications

A mortality cost of virginity at older ages in female Mediterranean fruit flies

A mortality cost of virginity at older ages in female Mediterranean fruit flies

Interactions between injury, stress resistance, reproduction, and aging in Drosophila melanogaster

Resistance to Environmental Stress in Drosophila melanogaster Selected for Postponed Senescence

Contact Info

Product

Resources

About