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102 results for “reproductive timing”
How does the timing of weapon loss influence reproductive traits and trade-offs in the insect Narnia femorata?
<p>A longstanding goal of evolutionary biology is to understand among-individual variation in resource allocation decisions and the timing of these decisions. Recent studies have shown that investment in elaborate and costly weapons can result in trade-offs with investment in testes. In this study, we ask at what point plasticity in resource allocation to these different structures ceases during development, if at all? Furthermore, can individuals tailor their reproductive behavior to accompany structural changes? We experimentally addressed these questions in the insect <em>Narnia femorata</em>, quantifying resource reallocation across development for the first time, using a phenotypic engineering approach. To investigate whether allocation plasticity diminishes throughout ontogeny, we induced weapon loss at a range of different developmental stages and examined subsequent testes mass and reproductive behavior. We found that relative testes mass increased as weapon investment decreased, implying a direct trade-off between testes and weapon investment. However, autotomy post-adulthood ceased to induce larger testes mass. Intriguingly, losing a weapon while young was associated with extended adult mating duration, potentially enabling compensation for reduced fighting ability. Our results highlight the importance of examining the ontogeny of trade-offs between reproductive traits and the flexibility of the relationship between reproductive morphology and behavior.</p>
Reproductive phenology is a repeatable, heritable trait linked to the timing of other life history events in a migratory marine predator
<p>Population-level shifts in reproductive phenology in response to environmental change are common, but whether individual-level responses are modified by demographic and genetic factors remains less well understood. We used mixed models to quantify how reproductive timing varied across 1,755 female southern elephant seals (<em>Mirounga</em> <em>leonina</em>) breeding at Marion Island in the Southern Ocean (1989–2019) and to identify the factors that correlate with phenological shifts within- and between individuals. We found strong support for covariation in the timing of breeding arrival dates and the timing of the preceding moult. Breeding arrival dates were more repeatable at the individual-level, as compared to the population-level, even after accounting for individual traits (wean date as a pup, age and breeding experience) associated with phenological variability. Mother-daughter similarities in breeding phenology were also evident, indicating that additive genetic effects may contribute to between-individual variation in breeding phenology. Over 30 years, elephant seal phenology did not change towards earlier or later dates, and we found no correlation between annual fluctuations in phenology and indices of environmental variation. Our results show how maternal genetic (or non-genetic) effects, individual traits and linkages between cyclical life-history events can drive within- and between-individual variation in reproductive phenology.</p>
Climate change does not equally affect temporal patterns of natural selection on reproductive timing across populations in two songbird species
<p>Climate change has led to changes in the strength of directional selection on seasonal timing. Understanding the causes and consequences of these changes is crucial to predicting the impact of climate change. But are observed patterns in one population generalisable to others, and can spatial variation in selection be explained by environmental variation among populations? We used long-term data (1955–2022) on blue and great tits co-occurring in four locations across the Netherlands to assess inter-population variation in temporal patterns of selection on laying date. To analyse selection, we combine reproduction and adult survival into a joined fitness measure. We found distinct spatial variation in temporal patterns of selection which overall acted towards earlier laying, and which was due to selection through reproduction rather than through survival. The underlying relationships between temperature, bird and caterpillar phenology were however the same across populations, and the spatial variation in selection patterns is thus caused by spatial variation in the temperatures and other habitat characteristics to which birds and caterpillars respond. This underlines that climate change is not necessarily equally affecting populations, but that we can understand this spatial variation, which enables us to predict climate change effects on selection for other populations.</p>
R code for Snyder, Ellner, and Hooker, "Time and chance: using age partitioning to understand how luck drives variation in reproductive success"
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Data for: Reproductive tactics, birth timing and the risk-resource trade-off in an income breeder
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Climate change does not equally affect temporal patterns of natural selection on reproductive timing across populations in two songbird species
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Data from: The effects of food supply on reproductive hormones and timing of reproduction in an income-breeding seabird
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Emergence and return times in a colonial, cave-dwelling bat: age and sex differences driven by reproductive cycle
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Reproductive phenology is a repeatable, heritable trait linked to the timing of other life history events in a migratory marine predator
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Data from: Latitudinal clines in the timing and temperature-sensitivity of photoperiodic reproductive diapause in Drosophila montana
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The earlier the better? Nesting timing and reproductive success in subalpine cavity-nesting bees
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Timing of a plant–herbivore interaction alters plant growth and reproduction
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Data: Sex-specific effects of capital resources on reproductive timing and success in red squirrels
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Artificial light at night, in interaction with spring temperature, modulates timing of reproduction in a passerine bird
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Data from: Intra-population variation in reproductive timing co-varies with thermal plasticity of offspring performance in perch (Perca fluviatilis)
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Local adaptation from afar: migratory bird populations diverge in the initiation of reproductive timing while wintering in sympatry
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Data from: Timing-dependent effects of elevated temperature on reproductive traits in the European corn borer moth
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How does the timing of weapon loss influence reproductive traits and trade-offs in the insect Narnia femorata?
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Species differences in reproductive timing and egg load in two fly species adapted to different host plants
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Data from: Importance of whole-plant biomass allocation and reproductive timing to habitat differentiation across the North American sunflowers
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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.