Acquisition and Allocation of Resources: Their Influence on Variation in Life History Tactics

Noordwijk, Arie J. van; Jong, G. de

doi:10.1086/284547

Cited by 2,037 publications

(1,878 citation statements)

References 7 publications

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“…This is surprising since some negative correlations were expected in our study, as a result of re-allocation between fitness-associated traits (Reznick, 2000). However, when resource assimilation is genetically variable, genotypes with high assimilation rates have more resources to allocate to all aspects of their life history, and positive genetic correlations should arise (Van Noodwijk & de Jong, 1986). As far as fecundity is concerned, this is a plausible explanation in our experiment since the number of eggs increased with individual size in both populations.…”

Section: (C) Limited Mating Activitycontrasting

confidence: 57%

Prior selfing and the selfing syndrome in animals: an experimental approach in the freshwater snailBiomphalaria pfeifferi

et al. 2008

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SummaryInbreeding species of hermaphroditic animals practising copulation have been characterized by few copulations, no waiting time (the time that an isolated individual waits for a partner before initiating reproduction compared with paired individuals) and limited inbreeding (self-fertilization) depression. This syndrome, which has never been fully studied before in any species, is analysed here in the highly selfing freshwater snail Biomphalaria pfeifferi. We conducted an experiment under laboratory conditions over two generations (G 1 and G 2 ) using snails sampled from two populations (100 individuals per population). G 1 individuals were either isolated or paired once a week (potentially allowing for crosses), and monitored during 29 weeks for growth, fecundity and survival. Very few copulations were observed in paired snails, and there was a positive correlation in copulatory activity (e.g. number of copulations) between the male and female sexual roles. The waiting time was either null or negative, meaning that isolated individuals initiated reproduction before paired ones. G 2 offspring did not differ in hatching rate and survival (to 28 days) between treatments, but offspring from paired individuals grew faster than those from isolated individuals. On the whole, the self-fertilization depression was extremely low in both populations. Another important result is that paired G 1 individuals began laying (selfed) eggs several weeks prior to initiating copulation : this is the first characterization of prior selfing (selfing initiated prior to any outcrossing) in a hermaphroditic animal. A significant population effect was observed on most traits studied. Our results are discussed with regard to the maintenance of low outcrossing rates in highly inbreeding species.

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Section: (C) Limited Mating Activitycontrasting

confidence: 57%

Prior selfing and the selfing syndrome in animals: an experimental approach in the freshwater snailBiomphalaria pfeifferi

et al. 2008

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“…This suggests that the association between PUUV infection and maturation or survival probability is not just due to an age effect. Assuming that host populations are made of individuals of different intrinsic quality (e.g., ability to fight infection), another possible hypothesis is that the probability of maturation is higher in infected than in noninfected bank voles because only the few ''high-quality'' individuals could afford the costs of fighting PUUV infection and going through the maturation process (Vaupel and Yashin, 1985;Van Noordwijk and Dejong, 1986). It is also possible that the physiologic or behavioral changes prior to the maturation process in rodents (Lambin and Yoccoz, 2001) already increase the risk of infection or the susceptibility of some individuals (Bernshtein et al, 1999;Klein and Calisher, 2007).…”

Section: Discussionmentioning

confidence: 99%

“…Alternatively, hosts may alter their lifehistory traits in order to compensate for the negative effects of parasitism. The resource allocation model (Van Noordwijk and Dejong, 1986) predicts early reproductive maturation or high reproductive investment to compensate for an increasing negative impact of chronic parasite infection through time (Gandon et al, 2001). An increased investment in reproduction was recorded in deer mice exposed to chronic schistosome infection (Schwanz, 2008); the same mechanism could hold for chronic PUUV infection in bank voles.…”

Section: Discussionmentioning

confidence: 99%

Impact of Puumala Virus Infection on Maturation and Survival in Bank Voles: A Capture-Mark-Recapture Analysis

Tersago

Crespin

Verhagen

et al. 2012

Journal of Wildlife Diseases

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ABSTRACT:Many zoonotic diseases are caused by rodent-borne viruses. Major fluctuations in the transmission of these viruses have been related to large changes in reservoir host population numbers due to external factors. However, the impact of the pathogen itself on the demography of its reservoir host is often overlooked. We investigated the impact of Puumala virus (PUUV) on survival and reproductive maturation probability of its reservoir host, the bank vole (Myodes glareolus). Three years (2004-06) of data from nine independent sites in southern Belgium were collected and analyzed with a capture-mark-recapture (CMR) method that includes statistical correction for the variation in capture probability of voles. A multistate model based on four states of reproductive activity and PUUV immunoglobulin G (IgG) antibody status was used to estimate survival and probability of transition from one reproductive or infection state to another. Although survival estimates for reproductively active voles were similar between infected and noninfected individuals, PUUV infection in reproductively inactive voles decreased mean monthly survival by 14%. PUUV infection was associated with a threefold increase in the probability of reproductive maturation in bank voles. Moreover, the probability of PUUV IgG seroconversion was three times higher for reproductively active voles compared to reproductively inactive voles. Our model indicates that PUUV infection may alter bank vole population dynamics by affecting both survival and maturation in its host. Additional studies, using CMR methodology with shorter time intervals between trapping sessions and possibly a longer duration, are needed to confirm these findings.

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“…Resources have to be allocated to different functions with the overall goal to optimize fitness, within the given constraints of limited resources. However, high variation in resource acquisition might mask negative correlations (i.e., trade-offs) between two traits (Van Noordwijk and Dejong 1986). In the two-trait Y model, resources that are allocated to mechanisms promoting cellular maintenance, and therefore, better survival, will not be available for reproduction.…”

Section: Introductionmentioning

confidence: 99%

Interactive effects of sex, social environment, dietary restriction, and methionine on survival and reproduction in fruit flies

Zajitschek

Friberg

et al. 2012

AGE

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For the evolution of life histories, the trade-off between survival and reproduction is fundamental. Because sexes optimize fitness in different ways, this trade-off is expected to be resolved differently by males and females. Consequently, the sexes are predicted to respond differently to changes in resource availability. In fruit flies, research on dietary restriction has focused largely on females maintained in the absence of males, thereby neglecting sexual interactions that affect reproductive behavior of both sexes under more natural conditions. Here, we tested for the interactive effects of diet (40, 60, 100, and 300 % of standard yeast concentrations) and social environment (separate-sex vs. mixed-sex groups) on male and female Drosophila melanogaster life histories. Additionally, we evaluated the essential amino acid methionine as an agent that can uncouple the survival-reproduction trade-off. We show sex differences in the effect of social environment on survival patterns, but not on reproductive fitness. In females, yeast had a positive effect on reproduction and a negative effect on survival. In males, yeast had a negative effect on reproduction and the effect on survival depended on the social environment. Methionine reduced survival, but had no effect on reproduction. Our findings highlight the need to include both sexes and to vary social environments in research programs aimed at lifespan extension and call for further evaluation of the fecundityrestoring effect of methionine.

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Acquisition and Allocation of Resources: Their Influence on Variation in Life History Tactics

Cited by 2,037 publications

References 7 publications

Prior selfing and the selfing syndrome in animals: an experimental approach in the freshwater snailBiomphalaria pfeifferi

Prior selfing and the selfing syndrome in animals: an experimental approach in the freshwater snailBiomphalaria pfeifferi

Impact of Puumala Virus Infection on Maturation and Survival in Bank Voles: A Capture-Mark-Recapture Analysis

Interactive effects of sex, social environment, dietary restriction, and methionine on survival and reproduction in fruit flies

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