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34 results for “offspring number”
Data from: Selection and constraints on offspring size-number trade-offs in sand lizards (Lacerta agilis)
The trade-off between offspring size and number is a central component of life-history theory, postulating that larger investment into offspring size inevitably decreases offspring number. This trade-off is generally discussed in terms of genetic, physiological or morphological constraints; however, as among-individual differences can mask individual trade-offs, the underlying mechanisms may be difficult to reveal. In this study, we use multivariate analyses to investigate whether there is a trade-off between offspring size and number in a population of sand lizards by separating among- and within-individual patterns using a 15-year data set collected in the wild. We also explore the ecological and evolutionary causes and consequences of this trade-off by investigating how a female's resource (condition)- vs. age-related size (snout-vent length) influences her investment into offspring size vs. number (OSN), whether these traits are heritable and under selection and whether the OSN trade-off has a genetic component. We found a negative correlation between offspring size and number within individual females and physical constraints (size of body cavity) appear to limit the number of eggs that a female can produce. This suggests that the OSN trade-off occurs due to resource constraints as a female continues to grow throughout life and, thus, produces larger clutches. In contrast to the assumptions of classic OSN theory, we did not detect selection on offspring size; however, there was directional selection for larger clutch sizes. The repeatabilities of both offspring size and number were low and we did not detect any additive genetic variance in either trait. This could be due to strong selection (past or current) on these life-history traits, or to insufficient statistical power to detect significant additive genetic effects. Overall, the findings of this study are an important illustration of how analyses of within-individual patterns can reveal trade-offs and their underlying causes, with potential evolutionary and ecological consequences that are otherwise hidden by among-individual variation.
Maternal Exercise during Pregnancy Increases BDNF Levels and Cell Numbers in the Hippocampal Formation but Not in the Cerebral Cortex of Adult Rat Offspring
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Individual variation in parental tradeoffs between the number and size of offspring at the pre- and post-natal stages
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Data from: Differential allocation of parental investment and the trade-off between size and number of offspring
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Data from: Selection and constraints on offspring size-number trade-offs in sand lizards (Lacerta agilis)
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Data from: Food-limited mothers favor offspring quality over offspring number: a principal components approach
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Data from: Males mate with multiple females to increase offspring numbers in a nursery web spider
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Data from: Mother and offspring fitness in an insect with maternal care: phenotypic trade-offs between egg number, egg mass and egg care
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Data from: Evaluating the tradeoff between offspring number and survivorship across fishes, amphibians, reptiles and mammals
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Copy number variation in Y chromosome multicopy genes is linked to a paternal parent-of-origin effect on CNS autoimmune disease in female offspring
GEO Series GSE65048. Mus musculus; synthetic construct. 15 samples. Type: Expression profiling by array; Non-coding RNA profiling by array.
Effect of Advanced Paternal Age on Copy Number Variation in Offspring (commercial array)
GEO Series GSE29455. Mus musculus. 22 samples. Type: Genome variation profiling by genome tiling array.
CGH array used to identify de novo copy number variations in offspring of BaP exposed parents.
GEO Series GSE128869. Mus musculus. 354 samples. Type: Genome variation profiling by array.
Effect of Advanced Paternal Age on Copy Number Variation in Offspring (custom array)
GEO Series GSE29454. Mus musculus. 27 samples. Type: Genome variation profiling by genome tiling array.
Effect of Advanced Paternal Age on Copy Number Variation in Offspring
GEO Series GSE29456. Mus musculus. 49 samples. Type: Genome variation profiling by genome tiling array.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.