The influence of age of the parents on some characteristics of the offspring of insects bred in the laboratory

Howe, Robert W.

doi:10.1016/0022-474x(67)90041-0

Cited by 19 publications

(11 citation statements)

References 23 publications

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“…Metabolic heating was a regrettable consequence of the much greater-thanexpected population density within the experimental grain masses but had no discernible effect on larval survival and hence on Ro, the major determinant of r^.. On the positive side, the need to quantify the role of metabolic heating drew attention to the positive correlation between maternal age and the duration of the immature stages. By contrast, Howe (1967) found that the curve relating duration of the immature stages to maternal age was parabolic with a maximum in middle age.…”

Section: Discussionmentioning

confidence: 85%

The capacity for increase at a low temperature of several Australian populations of Sitophilus oryzae (L.)

Evans

1977

Australian Journal of Ecology

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lation density shortened the duration of the immature stages by 7% but did not affect their survival. AbstractThe capacity for increase (r^) of one laboratory and seven field populations of young adult S. oryzae from different sites in Australia was determined over a thirty-week period at 15°C, a supposedly marginal temperature, in wheat of 14% moisture content.The average value of r^, was 0.0838 ± 0.0017 and the populations comprised three significantly different groups. Variations in the net rate of increase per generation ('RQA which averaged 34.7±1.71, had a major effect on the value of ic whereas variation in the cohort generation time /Tc), which averaged 41.6iO.23 weeks had only a minor effect. The survivorship of adults of the populations did not differ significantly and 93% of females were alive after thirty weeks. Estimates ofr^ based on a fifteen-week period and on an amended value of T^. differed little from those over thirty weeks.The capacity for increase at lS'^C of a given population was found to be correlated with its fertility at 27°C and with its bodyweight rather than with its cold-tolerance, as evidenced by chill-coma temperature, or with its previous temperature-history.The temperature experienced by the immature stages of weevils had a profound effect on r^. in that weevils reared at 15 and 27°C had respective values of 0.0350 and 0.0707 when subsequently cultured at 15°C.Because all observed values of Xc were higher than expected, possible errors in method were considered. An alternative estimate of Ro agreed closely with that observed and indicated that only 17% of the immature stages survived at 15°C. Metabolic heating due to the higher than expected popu-

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Section: Discussionmentioning

confidence: 85%

The capacity for increase at a low temperature of several Australian populations of Sitophilus oryzae (L.)

Evans

1977

Australian Journal of Ecology

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“…The longer development time of O1 and its negative correlation with starvation tolerance are in agreement with a study reporting a negative correlation between development time and adult survival in the same species (Soliman, ). However, the effect of parental age on development time and larval, pupal, and adult mass in flour beetles is probably species‐ or strain‐specific (Howe, ; Soliman, ). An increase in offspring development time was accompanied by their larger adult body mass, a common life‐history trade‐off (Nylin & Gotthard, ).…”

Section: Discussionmentioning

confidence: 99%

The consequences of parental age for development, body mass and resistance to stress in the red flour beetle

Halle

Nowizki

Scharf

2015

Biol J Linn Soc Lond

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The performance of most animals deteriorates with age. Motivated by the inconsistency in the literature regarding the effect of parental age on offspring traits and performance, we studied how parental age affects offspring development time, body mass, and starvation and cold tolerance in the red flour beetle (Tribolium castaneum). Offspring of old parents pupated later and at a higher body mass, and there was a general positive correlation between body mass and starvation tolerance. Despite their higher body mass, offspring of old parents tolerated starvation less well than those of young parents, emphasizing the impaired performance of the former. However, parental age did not affect offspring thermal tolerance and offspring of old parents were not more sensitive to cold shock than those of young parents. We also examined how ageing affects body mass and cold tolerance in the parental generations. By contrast to the effect of ontogeny on thermal tolerance, which is better known, change in thermal tolerance with age is seldom studied and can take different shapes. Old beetles were more sensitive to cold shock than younger beetles. Similar to cold tolerance, body mass decreased with age. In summary, older beetles reflect a worse physiological condition than younger ones. Ageing leads to impaired cold tolerance, lower body mass, lower number of offspring reaching adulthood, and deteriorated performance of the offspring, expressed as a lower starvation tolerance and a longer development time of the offspring.

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“…Maternal age at the time of an individual's birth, or egg order in species which reproduce only once, have been shown to cause remarkable variability within single families, particularly among the insects (e.g., HOWE, 1967). Only a few workers have considered the possible influence of such variability on population dynamics, or its potential as a population-regulating mechanism (e. g., MURAI and KIRITANI, 1970;VISSCHER, 1971;WATTIAUX, 1968;WELLINGTON, 1957WELLINGTON, , 1960.…”

Section: Introductionmentioning

confidence: 99%

Maternal age as a source of variation in the ability of an aphid to produce dispersing forms

MacKay

Wellington

1976

Population Ecology

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SummaryApterous parthenogentic females of the pea aphid, Acyrthosiphon pisum (Harris), begin to produce alate offspring soon after they have been subjected to crowding. Females which were born early in their own parent's reproductive period respond most strongly to crowding, producing much larger numbers of alatae than their late‐born sisters.In contrast, the early‐born daughters of most alate females do not produce winged offspring after being crowded. Some of their later‐born sisters may produce a few winged individuals, resembling in this respect the late‐born daughters of the apterous females.Control of the production of alatae thus begins in the grandparental generation. Risk‐spreading by means of differential dispersal becomes a less uncertain venture when local populations can modify their responses to environmental changes by utilizing past as well as present signals from their surroundings.

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The influence of age of the parents on some characteristics of the offspring of insects bred in the laboratory

Cited by 19 publications

References 23 publications

The capacity for increase at a low temperature of several Australian populations of Sitophilus oryzae (L.)

The capacity for increase at a low temperature of several Australian populations of Sitophilus oryzae (L.)

The consequences of parental age for development, body mass and resistance to stress in the red flour beetle

Maternal age as a source of variation in the ability of an aphid to produce dispersing forms

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