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10 results for “condition-dependent signal”
Data for: Offspring plumage colouration as a condition-dependent signal in the Blue Tit
<p>In many species, offspring display conspicuous colouration already early in life, even though they might be very vulnerable to predation at this stage. However, most attention has been drawn to the conspicuous plumage displayed by adult individuals in a sexual context, while other signalling functions have been explored much less. Here, we investigated whether the yellow breast plumage of blue tit (<em>Cyanistes caeruleus</em>) nestlings shows patterns of condition-dependence and hence signals individual quality, as has been described for adult birds. During three consecutive breeding seasons, we, therefore, explored the association between nestling body mass and three colour components of the yellow breast plumage (i.e., UV chroma, carotenoid chroma and total brightness), considering both within and among nest effects. Variation in carotenoid chroma was not related to body mass. However, UV chroma and total brightness varied with body mass on an among-nest level, suggesting that they might signal aspects of genetic quality or parental rearing capacity. Interestingly, we also found a within-nest effect of body mass on total brightness, suggesting that this is a good candidate for a condition-dependent signal within the family. Thus, other family members could rely on brightness to adjust their behavioural strategies, such as feeding behaviour in parents. Our study thus reveals that certain colour components of the yellow breast plumage might signal different aspects of offspring quality and they might have a correlated signalling value across life-history stages.</p>
Dataset:Female state and condition-dependent chemical signalling revealed by male choice of silk trails
<p class="MsoNormal"><span>We ask whether males of the nuptial gift-giving spider <em>Pisaura mirabilis</em> exert preferences for mates varying in their reproductive potential based on chemical information during mate search. Males were presented with binary trails consisting of silk lines and substrate-borne chemicals deposited while females were walking, from females varying in a) body condition (high vs. low), b) developmental state (subadult vs. adult) and c) mating state (unmated vs. mated). If female chemical signaling co-varies with individual state, we expect males to choose trails of females that are a) in higher body condition, indicating higher fecundity, b) adults, which can successfully reproduce, and c) unmated, to avoid sperm competition. </span><span>We show that female signaling is condition-dependent, with m</span><span>ales being</span><span> more likely to follow trails of higher body condition females, but not dependent on female mating state. Males also tended to prefer trails of adults over subadults. Choice did not depend on male individual body condition.</span></p>
Data for: Offspring plumage colouration as a condition-dependent signal in the Blue Tit
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Dataset:Female state and condition-dependent chemical signalling revealed by male choice of silk trails
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Data from: Interpopulation variation in a condition-dependent signal: predation regime affects signal intensity and reliability
In many models of sexual selection, conspicuous ornaments are preferred by mates because they indicate heritable signaler viability. To function as indicators, ornaments must exhibit a proportional relationship between expression and viability. In cases where the evolutionary interests of signaler and receiver diverge, selection favors exploitative exaggeration by low-viability individuals producing unreliable signals. Theory suggests that the evolutionary stability of such communication systems requires costs that prevent low-viability males from expressing disproportionately intense signals. Therefore, given ecological variation in signaling cost, the reliability of signaling systems will vary concomitantly. In this study, we assess the effect of a variable signal cost, predation, on signal intensity and reliability among 16 populations of Bahamas mosquitofish (Gambusia hubbsi) that use colorful dorsal fins in courtship displays. We found that fin coloration was more intense in low-predation sites and could be used to predict body condition. However, this predictive relationship was apparent only in populations subject to predation risk. We demonstrate an important role for ecological signaling cost in communication and show that ecological heterogeneity drives interpopulation variation in both the intensity and the reliability of a sexual signal.
Data from: Interpopulation variation in a condition-dependent signal: predation regime affects signal intensity and reliability
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Spectral data for analysis: Full spectra colouration and condition-dependent signalling in a skin-based carotenoid sexual ornament
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Data from: Has the inbreeding load for a condition-dependent sexual signalling trait been purged in insular lizard populations?
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Data from: A condition-dependent male sexual signal predicts adaptive predator-induced plasticity in offspring
<p>The possibility that sexual selection promotes adaptive evolution in variable environments remains controversial. In particular, where the scale of environmental variation results in parents and their offspring experiencing different environmental conditions, such variation is expected to break down associations between adult sexual traits and adaptive offspring traits. However, when adaptive offspring plasticity in nonsexual traits acts as an indirect benefit of mate choice, then mate choice for males that produce more plastic offspring could promote adaptation to variable environments. This hypothesis assumes that male sexual signals predict offspring plasticity, which has rarely been tested. To test this assumption, we used spadefoot toads (<i>Spea multiplicata</i>) to investigate whether variation in male sexual signals predicts the expression of tadpole tail-fin plasticity in response to predation cues. Such plasticity has been shown to be adaptive in numerous amphibian taxa. We found that condition-dependent male call characteristics predicted offspring plasticity. Generally, both phenotypic plasticity and female mate choice are ubiquitous in nature; therefore, adaptive associations between male sexual signals and offspring plasticity such as the one reported here might be common. </p>
Data from: A condition-dependent male sexual signal predicts adaptive predator-induced plasticity in offspring
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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.