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17
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ShareScore release 0.9.0
Dataset results
17 results for “cross-fostering”
Data from: Cross-fostering eggs reveals that female collared flycatchers adjust clutch sex ratios according to parental ability to invest in offspring
Across animal taxa, reproductive success is generally more variable and more strongly dependent upon body condition for males than for females; in such cases, parents able to produce offspring in above-average condition are predicted to produce sons, whereas parents unable to produce offspring in good condition should produce daughters. We tested this hypothesis in the collared flycatcher (Ficedula albicollis) by cross-fostering eggs among nests and using the condition of foster young that parents raised to fledging as a functional measure of their ability to produce fit offspring. As predicted, females raising heavier-than-average foster fledglings with their social mate initially produced male-biased primary sex ratios, whereas those raising lighter-than-average foster fledglings produced female-biased primary sex ratios. Females also produced male-biased clutches when mated to males with large secondary sexual characters (wing patches), and tended to produce male-biased clutches earlier within breeding seasons relative to females breeding later. However, females did not adjust the sex of individuals within their clutches; sex was distributed randomly with respect to egg size, laying order, and paternity. Future research investigating the proximate mechanisms linking ecological contexts and the quality of offspring parents are able to produce with primary sex-ratio variation could provide fundamental insight into the evolution of context-dependent sex-ratio adjustment.
Data from: Induced parental care in a poison frog: a tadpole cross-fostering experiment
Understanding the external stimuli and natural contexts that elicit complex behaviours, such as parental care, is key in linking behavioural mechanisms to their real-life function. Poison frogs provide obligate parental care by shuttling their tadpoles from terrestrial clutches to aquatic nurseries, but little is known about the proximate mechanisms that control these behaviours. In this study, we used Allobates femoralis, a poison frog with predominantly male parental care, to investigate whether tadpole transport can be induced in both sexes by transferring unrelated tadpoles to the backs of adults in the field. Specifically, we asked whether the presence of tadpoles on an adult's back can override the decision-making rules preceding tadpole pick-up and induce the recall of spatial memory necessary for finding tadpole deposition sites. We used telemetry to facilitate accurate tracking of individual frogs and spatial analysis to compare movement trajectories. All tested individuals transported their foster-tadpoles to water pools outside their home area. Contrary to our expectation, we found no sex difference in the likelihood to transport or in the spatial accuracy of finding tadpole deposition sites. We reveal that a stereotypical cascade of parental behaviours that naturally involves sex-specific offspring recognition strategies and the use of spatial memory can be manipulated by experimental placement of unrelated tadpoles on adult frogs. As individuals remained inside their home area when only the jelly from tadpole-containing clutches was brushed on the back, we speculate that tactile rather than chemical stimuli trigger these parental behaviours.
Data from: Are blue eggs a sexually selected signal of female collared flycatchers? A cross-fostering experiment
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Data from: Troubleshooting the potential pitfalls of cross-fostering
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Data from: The influence of social structure on brood survival and development in a socially polymorphic ant: insights from a cross-fostering experiment
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Data from: Cross-fostering eggs reveals that female collared flycatchers adjust clutch sex ratios according to parental ability to invest in offspring
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Data from: Induced parental care in a poison frog: a tadpole cross-fostering experiment
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Data from: Superiority of extra-pair offspring: maternal but not genetic effects as revealed by a mixed cross-fostering design
Extra-pair copulations (EPC) are a rule rather than an exception in socially monogamous birds. Despite widespread occurrences, the benefits of female infidelity remain illusive. Most attention has been paid to the possibility that females gain genetic benefits from EPC. Fitness comparison between maternal half-siblings is considered to be a defining test of this hypothesis. Recently it was shown that these comparisons may be confounded by within-brood maternal effects. One such effect may be the distribution of half-siblings in the laying order. This possibility is difficult to study since it would be necessary to detect from which egg the chick hatched. Here we used a new approach for egg-chick assignment. We cross-fostered eggs on an individual basis among a set of nests of the collared flycatcher Ficedula albicollis. After hatching, chicks were ascribed to mothers and therefore to individual eggs by molecular-genetic methods. Extra-pair young predominated early in the laying order. Under natural conditions, this should give them a competitive advantage over their half-siblings mediated by hatching asynchrony. However, we experimentally synchronized hatching. After this treatment extra-pair young did not outperform within-pair young in any studied trait including survival up to recruitment and several indicators of reproductive success and attractiveness. We obtained only modest sample size for the last two traits and did not test for extra-pair success of male offspring. Thus we cannot exclude the possibility of slight advantages of EPY during their adult phase of life. However, our data tentatively suggest that more likely reason for females' EPCs is the insurance against the infertility of a social mate.
Data from: Superiority of extra-pair offspring: maternal but not genetic effects as revealed by a mixed cross-fostering design
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Data from: Experimental cross-fostering of eggs reveals effects of territory quality on reproductive allocation
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Effects of cross-fostering and developmental exposure to mixtures of environmental contaminants on hepatic gene expression in prepubertal 21 days old and adult male Sprague-Dawley rats IV.
GEO Series GSE109016. Rattus norvegicus. 16 samples. Type: Expression profiling by array.
Effects of cross-fostering and developmental exposure to mixtures of environmental contaminants on hepatic gene expression in prepubertal 21 days old and adult male Sprague-Dawley rats
GEO Series GSE109019. Rattus norvegicus. 72 samples. Type: Expression profiling by array.
Effects of cross-fostering and developmental exposure to mixtures of environmental contaminants on hepatic gene expression in prepubertal 21 days old and adult male Sprague-Dawley rats II.
GEO Series GSE109014. Rattus norvegicus. 16 samples. Type: Expression profiling by array.
Effects of cross-fostering and developmental exposure to mixtures of environmental contaminants on hepatic gene expression in prepubertal 21 days old and adult male Sprague-Dawley rats VI.
GEO Series GSE109018. Rattus norvegicus. 8 samples. Type: Expression profiling by array.
Effects of cross-fostering and developmental exposure to mixtures of environmental contaminants on hepatic gene expression in prepubertal 21 days old and adult male Sprague-Dawley rats V.
GEO Series GSE109017. Rattus norvegicus. 16 samples. Type: Expression profiling by array.
Effects of cross-fostering and developmental exposure to mixtures of environmental contaminants on hepatic gene expression in prepubertal 21 days old and adult male Sprague-Dawley rats I
GEO Series GSE109013. Rattus norvegicus. 8 samples. Type: Expression profiling by array.
Effects of cross-fostering and developmental exposure to mixtures of environmental contaminants on hepatic gene expression in prepubertal 21 days old and adult male Sprague-Dawley rats III.
GEO Series GSE109015. Rattus norvegicus. 8 samples. Type: Expression profiling by array.
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