Mothers reduce egg provisioning with age

Giron, David; Casas, Jérôme

doi:10.1046/j.1461-0248.2003.00429.x

Cited by 132 publications

(142 citation statements)

References 31 publications

Supporting

Mentioning

133

Contrasting

Order By: Relevance

“…It was suggested in each study that the observed decreases in egg size were due to reduction in adult size resulting from limited feeding after the onset of reproduction, or the detrimental effects of aging. Similar decreases in propagule size with age have been reported for shortlived terrestrial species including the housefly (McIntyre & Gooding 2000), a parasitic wasp (Giron & Casas 2003), some butterflies (Fischer et al 2003), and 8 weedy herbaceous plants (Cavers & Steel 1984). Egg size has occasionally been reported to increase with age in arthropods (e.g.…”

Section: Introductionsupporting

confidence: 64%

Repeatability of egg size in two marine gastropods: brood order and female size do not contribute to intraspecific variation

Collin

2010

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Egg size has been shown to vary among females in many species of marine invertebrates and fishes. Usually, however, only a single reproductive event is measured for each female, leaving open the possibility that egg size could vary significantly among broods from the same female. Here I measured egg size from 3 to 7 broods per female from 2 calyptraeid species, Crepidula atrasolea and C. ustulatulina, in 2 experiments. In a preliminary experiment, females were raised from hatching under constant temperature in incubators; in a second larger experiment, they were raised under varying temperatures on the laboratory bench top. Under both conditions, there were significant differences in egg size among broods from each female, as well as significant differences among females from the bench top. Estimates of repeatability, which give an upper boundary on the heritability of a trait, were significantly reduced when among brood variation was included in the calculations, suggesting that caution should be used in interpreting among-female components of variation in studies that measure only a single brood per female. Egg size was not related to female size, and there was an effect of brood order on egg size in only C. ustulatulina from the bench top. Eggs produced in the incubators were larger than those from the bench top and they were more variable within broods, resulting in a lower repeatability of egg size from incubator animals than from bench top animals. The significant variation in egg size at all levels of the analysis suggests that such variation should be included in models of egg size evolution, and that the evolutionary dynamics of egg size may be more complicated than reflected in current models of life-history evolution. KEY WORDS: Crepidula · Direct development · Phenotypic plasticity · Bet-hedgingResale or republication not permitted without written consent of the publisher

show abstract

Section: Introductionsupporting

confidence: 64%

Repeatability of egg size in two marine gastropods: brood order and female size do not contribute to intraspecific variation

Collin

2010

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

show abstract

“…Within this experiment E. inaron did not experience sperm limitation per se, because spermatheca dissection confirmed the presence of ample sperm in virtually all mated individuals. However, sperm quality may have diminished with age (Ridley, 1988), or it is possible that female eggs receive greater nutrient provisioning than male eggs, and that older (lower quality) mothers opt to lay less costly male eggs (Giron and Casas, 2003).…”

Section: Discussionmentioning

confidence: 99%

Endosymbiont costs and benefits in a parasitoid infected with both Wolbachia and Cardinium

et al. 2010

View full text Add to dashboard Cite

Theory suggests that maternally inherited endosymbionts can promote their spread and persistence in host populations by enhancing the production of daughters by infected hosts, either by improving overall host fitness, or through reproductive manipulation. In the doubly infected parasitoid wasp Encarsia inaron, Wolbachia manipulates host reproduction through cytoplasmic incompatibility (CI), but Cardinium does not. We investigated the fitness costs and/or benefits of infection by each bacterium in differentially cured E. inaron as a potential explanation for persistence of Cardinium in this population. We introgressed lines infected with Wolbachia, Cardinium or both with the cured line to create a similar genetic background, and evaluated several parasitoid fitness parameters. We found that symbiont infection resulted in both fitness costs and benefits for E. inaron. The cost was lower initial egg load for all infected wasps. The benefit was increased survivorship, which in turn increased male production for wasps infected with only Cardinium. Female production was unaffected by symbiont infection; we therefore have not yet identified a causal fitness effect that can explain the persistence of Cardinium in the population. Interestingly, the Cardinium survivorship benefit was not evident when Wolbachia was also present in the host, and the reproduction of doubly infected individuals did not differ significantly from uninfected wasps. Therefore, the results of our study show that even when multiple infections seem to have no effect on a host, there may be a complex interaction of costs and benefits among symbionts.

show abstract

“…For instance, female-age dependent reduction in egg weight should result from a depletion in the nitrogen resources rather than in hydrocarbons (the former are not replenished by adult feeding: Wheeler, 1996; Boggs, 1997Boggs, , 2003O'Brien et al, 2002O'Brien et al, , 2004. Thus in butterflies, the size of the eggs should decrease as one of the two nutrients becomes scarce, rather than show a shift in the C : N ratio (as reported for parasitic wasps: Rivero et al, 2001;Giron & Casas, 2003;cf. Fischer et al, 2004, andO'Brien et al, 2004 for butterflies).…”

Section: Discussionmentioning

confidence: 92%

Within and between species scaling in the weight, water, carbon and nitrogen contents of eggs and neonate larvae of twelve satyrine butterflies (Lepidoptera: Nymphalidae)

García‐Barros¹

2006

Eur. J. Entomol.

View full text Add to dashboard Cite

Abstract. The fresh weight, dry weight, and C and N content of the eggs, egg shells and neonate larvae of several satyrines were measured. This was done in order to assess the specificity of the composition of the egg and larvae, the phylogenetic or ecological nature of the variation and the existence of structural constraints on the composition of the offspring. All the traits investigated were found to be highly species-specific. The nature of the variation was not primarily phylogenetic, suggesting that the composition of the offspring has an ecological meaning. However, only a slight association was detected between three life history traits or habitat features and the compositions of the eggs or larvae, namely: female egg dropping was associated with a high C content of the eggs, xerophily with a high C : N ratio, and a high content of N in the larvae with egg diapause. The evidence for intra-specific allometry between the traits investigated and egg weight varied among the species, suggesting that the slope of such relationship may be a specific feature. There was a close to isometric relationship between C and N contents in every species. Therefore simple C : N ratios are independent of egg size, hence they can be used directly in comparative studies. Across species analyses indicated that small offspring contained a proportionally low amount of carbon and had a high dry matter content, suggesting that selection for small eggs was accompanied by selection for an enhanced proportion of nitrogen per egg. Finally, the species with large adult females invested comparatively more nitrogen per egg, which indicates a potential, constraint-based advantage of large adult size.

show abstract

Mothers reduce egg provisioning with age

Cited by 132 publications

References 31 publications

Repeatability of egg size in two marine gastropods: brood order and female size do not contribute to intraspecific variation

Repeatability of egg size in two marine gastropods: brood order and female size do not contribute to intraspecific variation

Endosymbiont costs and benefits in a parasitoid infected with both Wolbachia and Cardinium

Within and between species scaling in the weight, water, carbon and nitrogen contents of eggs and neonate larvae of twelve satyrine butterflies (Lepidoptera: Nymphalidae)

Contact Info

Product

Resources

About