... on their numerous insect hosts, including manipulating the host reproductive system in order to increase the bacteria spreading in a host population, and increasing the host fitness. Here, we demonstrate that the type of Wolbachia infection determines the effect on Drosophila melanogaster egg production as a proxy...

... of fleas would be lowest on non-breeding females, moderate on pregnant females and highest on lactating females. We estimated feeding performance of the fleas via absolute and mass-specific bloodmeal size and reproductive performance via egg production and latency to peak oviposition. Host reproductive...

...Joshua B. Benoit; Kevin R. Patrick; Karina Desai; Jeffrey J. Hardesty; Tyler B. Krause; David L. Denlinger SUMMARY In this study of the mosquito, Culex pipiens , we examined the impact of multiple bouts of dehydration and rehydration on survival, depletion of metabolic reserves and egg production...

...Katrina G. Salvante; François Vézina; Tony D. Williams SUMMARY Recent studies have shown that the metabolic cost of avian egg production involves a 16–27% increase in metabolic rate (MR) above non-reproductive basal or resting values (BMR and RMR, respectively). To determine how the metabolic cost...

...-biased parasitism. * Author for correspondence (e-mail: krasnov@bgu.ac.il ) 12 3 2009 2009 rodents fleas gender blood meal size egg production The behaviour of an individual is determined, to a great extent, by the evolutionary motivation to maximize lifetime fecundity...

... variable adjustment or `plasticity' in energy expenditure associated with egg production is repeatable among individuals between successive breeding attempts in female zebra finches ( Taeniopygia guttata ). Our study highlights the importance (a) of measuring`plasticity' or change associated...

... reproductive anemia associated with egg production(hemodilution, transient suppression of erythropoiesis, resource dependence)in relation to (1) the time-course of development and recovery from anemia,(2) changes in specific hematological traits, and (3) the effect of diet quality, in female zebra finches...

... observed during egg production in birds might be due to antagonistic pleiotropic effects of estrogens. This could generate costs of reproduction by reducing oxygen-carrying capacity during subsequent aerobically demanding stages such as chick-provisioning. Here we show that the reduction in hematocrit...

... hosts. When parasitizing G. dasyurus , females of both flea species required a similar number of blood meals to start oviposition, independent of density. By contrast, fleas on M. crassus at higher densities needed less blood meals than at lower densities. Egg production of female fleas differed...

...Katrina G. Salvante; Rosemary L. Walzem; Tony D. Williams SUMMARY Avian reproduction is generally timed to synchronize chick-rearing with periods of increased food abundance. Consequently, the energetically demanding period of egg production may coincide with periods of lower food availability...

...François Vézina; Tony D. Williams SUMMARY The metabolic cost of egg production in birds (passerines) has been measured as a 16–27% increase in basal or resting metabolic rate (BMR and RMR, respectively) when comparing non-breeding values with those in egg-producing individuals. However, available...

... consequences for egg production. * Author for correspondence (e-mail: cjp2@stir.ac.uk ) † Present address: School of Biological Sciences, Hatherly Laboratories,University of Exeter, Exeter, EX4 4PS, UK 25 3 2004 © The Company of Biologists Limited 2004 2004 Japanese quail...

...François Vézina; Katrina G. Salvante; Tony D. Williams SUMMARY Little is known about the energy costs of egg production in birds. We showed in previous papers that, during egg production, European starlings( Sturnus vulgaris ) undergo a 22% increase in resting metabolic rate(RMR...

... by Company of Biologists 1999 egg production yolk oocyte growth vitellogenin intraspecific variation starling Sturnus vulgaris Reproduction necessitates the allocation of resources among competing demands ( Stearns, 1992 ). Trade-offs may occur within reproductive bouts (e.g. between...