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40 results for “maternal investment”
Data from: On the importance of having a good mother: maternal investment affects duckling mortality risk in wood ducks
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Data from: Effects of maternal investment, temperament, and cognition on guide dog success
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Data from: Placentation and maternal investment in mammals
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Data for: Maternal glucocorticoid levels during incubation predict breeding success, but not reproductive investment, in a free-ranging bird
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Data from: How maternal investment varies with environmental factors and the age and physiological state of wild tsetse Glossina pallidipes and Glossina morsitans morsitans
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Data from: Oxygen limitation at the larval stage and the evolution of maternal investment per offspring in aquatic environments
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Data from: Senescence impacts reproduction and maternal investment in bottlenose dolphins
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Data from: Male and female helper effects on maternal investment and adult survival in red-winged fairy-wrens
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Data from: Cooperative breeding favours maternal investment in size over number of eggs in spiders
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Fig 2 from: Wilson JD, Anner SC, Murphy SM, Tinghitella RM (2020) Consequences of advanced maternal age on reproductive investment of male offspring. Journal of Orthoptera Research 29(1): 71-76. https://doi.org/10.3897/jor.29.39228
Fig 2 Reproductive investment of male offspring by treatment. For all male offspring from both maternal age treatments: A. Testes mass; B. Spermatophore mold mass. There were no significant differences between treatments for either measure. Bars represent least square means ± SE.
Fig 1 from: Wilson JD, Anner SC, Murphy SM, Tinghitella RM (2020) Consequences of advanced maternal age on reproductive investment of male offspring. Journal of Orthoptera Research 29(1): 71-76. https://doi.org/10.3897/jor.29.39228
Fig 1 A diagram of our experimental mating design. We mated females at either a young age (7 days after eclosion to adulthood) or an old age (25 days after eclosion to adulthood) for two subsequent generations, then measured three proxies of reproductive investment in males of the F3 generation. The F3 families from the Old treatment were the offspring of 8 founding females and the F3 families from the Young treatment were the offspring of 7 founding females.
Data from: Increased prenatal maternal investment reduces inbreeding depression in offspring
Inbreeding depression refers to the reduction of fitness that results from matings between relatives. Evidence for reduced fitness in inbred individuals is widespread, but the strength of inbreeding depression varies widely both within and among taxa. Environmental conditions can mediate this variation in the strength of inbreeding depression, with environmental stress exacerbating the negative consequences of inbreeding. Parents can modify the environment experienced by offspring, and have thus the potential to mitigate the negative consequences of inbreeding. While such parental effects have recently been demonstrated during the postnatal period, the role of prenatal parental effects in influencing the expression of inbreeding depression remains unexplored. To address this gap, we performed matings between full-sibs or unrelated individuals in replicated lines of Japanese quail (Coturnix japonica) experimentally selected for high and low maternal egg provisioning. We show that in the low maternal investment lines hatching success was strongly reduced when parents were related. In the high maternal investment lines, however, this negative effect of inbreeding on hatching success was absent, demonstrating that prenatal maternal provisioning can alleviate the negative fitness consequences of inbreeding.
Data from: A trade-off between reproductive investment and maternal cerebellum size in a precocial bird
Natural selection favours increased investment in reproduction, yet considerable variation in parental investment is observed in natural populations. Life-history theory predicts that this variation is maintained by a trade-off between the benefits of increased reproductive investment and its associated costs for the parents. The nature of these costs of reproduction, however, remains poorly understood. The brain is an energetically highly expensive organ and increased reproductive investment may, therefore, negatively affect brain maintenance. Using artificial selection lines for high and low prenatal maternal investment in a precocial bird, the Japanese quail (Coturnix japonica), we provide experimental evidence for this hypothesis by showing that increased prenatal provisioning negatively affects the size of a particular brain region of the mother, the cerebellum. Our finding suggests that cognitive demands may constrain the evolution of parental investment, and vice versa, contributing to the maintenance of variation in reproductive behaviour in animal populations.
Data from: Age-specific patterns of maternal investment in common gull egg yolk
While the general patterns of age-specific changes in reproductive success are quite well established in long-lived animals, we still do not know if allocation patterns of maternally-transmitted compounds are related to maternal age. We measured yolk testosterone, carotenoids and vitamins A and E levels in a population of known-aged common gulls (Larus canus) and found an age-specific pattern in yolk lutein and vitamin A concentrations. Middle-aged mothers allocated more of these substances to yolk compared to young and old mothers. These results can be explained through differences in age-specific foraging, absorption, or deposition patterns of carotenoids and vitamins into yolk. If these molecules play a role in antioxidant defense and immune modulation, our results suggest a possible physiological pathway behind the age-specific changes in reproductive success of long-lived birds in the wild.
Data from: A trade-off between reproductive investment and maternal cerebellum size in a precocial bird
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Data from: Maternal investment increases with altitude in a frog on the Tibetan plateau
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Data from: Age-specific patterns of maternal investment in common gull egg yolk
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Data from: Maternal investment increases with altitude in a frog on the Tibetan plateau
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Data from: Increased prenatal maternal investment reduces inbreeding depression in offspring
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Maternal investment, ecological lifestyle, and brain evolution in sharks and rays
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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.