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64 results for “behavioural plasticity”
Sex-specific effects of psychoactive pollution on behavioural individuality and plasticity in fish
<p>The global rise of pharmaceutical contaminants in the aquatic environment poses a serious threat to ecological and evolutionary processes. Studies have traditionally focused on the collateral (average) effects of psychoactive pollutants on ecologically-relevant behaviours of wildlife, often neglecting effects among and within individuals, and whether they differ between males and females. We tested whether psychoactive pollutants have sex-specific effects on behavioural individuality and plasticity in guppies (<em>Poecilia</em> <em>reticulata</em>), a freshwater species that inhabits contaminated waterways in the wild. Fish were exposed to fluoxetine (Prozac) for two years across multiple generations before their activity and stress-related behaviour were repeatedly assayed. Using a Bayesian statistical approach that partitions the effects among and within individuals, we found that males—but not females—in fluoxetine-exposed populations differed less from each other in their behaviour (lower behavioural individuality) than unexposed males. In sharp contrast, effects on behavioural plasticity were observed in females—but not in males—whereby exposure to even low levels of fluoxetine resulted in a substantial decrease (activity) and increase (freezing behaviour) in the behavioural plasticity of females. Our evidence reveals that psychoactive pollution has sex-specific effects on the individual behaviour of fish, suggesting that males and females might not be equally vulnerable to global pollutants.</p>
Sex-specific effects of psychoactive pollution on behavioural individuality and plasticity in fish
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Data from: Developmental behavioural plasticity and DNA methylation patterns in response to predation stress in Trinidadian guppies
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Data for: Behavioural plasticity compensates for adaptive loss of cricket song
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Data from: Colour plasticity alters thermoregulatory behaviour in Battus philenor caterpillars by modifying the cue received
Behaviour is an important way for animals to rapidly respond to changes in their current environment; however, over extended periods animals can also respond to environmental change via slower, developmental plasticity in other traits. This developmental plasticity could itself alter the animal's behaviour in two ways: it could change the state of the aspect of the animal's current environment that induces the behaviour (the cue), or it could change the physiology underlying production of that behaviour (the behavioural reaction norm). We tested these alternatives for two responses to temperature, colour plasticity and refuge-seeking behaviour, in pipevine swallowtail, Battus philenor, caterpillars. Prior research found that black caterpillars seek thermal refuges at lower ambient temperatures than red caterpillars in the field. Here, we found that the effect of colour on behaviour in the laboratory depended on how we heated the caterpillars. When warmed by radiant heat, black caterpillars sought refuge sooner than red caterpillars, as occurs in nature. In contrast, when warmed by conduction of heat, black caterpillars no longer sought refuges sooner than red caterpillars. Both colour morphs began seeking refuges at the same body temperature in both experiments, and the sensitivity of their metabolic rate to temperature was also the same. Taken together, our findings indicate that while colour does change the cue for refuge seeking, it does not change the behaviour's reaction norm. Similar cue-mediated interactions may often occur for thermoregulatory behaviour in other species.
Data from: Correlational selection on personality and social plasticity: morphology and social context determine behavioural effects on mating success
Despite a central line of research aimed at quantifying relationships between mating success and sexually dimorphic traits (e.g., ornaments), individual variation in sexually selected traits often explains only a modest portion of the variation in mating success. Another line of research suggests that a significant portion of the variation in mating success observed in animal populations could be explained by correlational selection, where the fitness advantage of a given trait depends on other components of an individual's phenotype and/or its environment. We tested the hypothesis that interactions between multiple traits within an individual (phenotype dependence) or between an individual's phenotype and its social environment (context dependence) can select for individual differences in behaviour (i.e., personality) and social plasticity. To quantify the importance of phenotype- and context-dependent selection on mating success, we repeatedly measured the behaviour, social environment and mating success of about 300 male stream water striders, Aquarius remigis. Rather than explaining individual differences in long-term mating success, we instead quantified how the combination of a male's phenotype interacted with the immediate social context to explain variation in hour-by-hour mating decisions. We suggest that this analysis captures more of the mechanisms leading to differences in mating success. Males differed consistently in activity, aggressiveness and social plasticity. The mating advantage of these behavioural traits depended on male morphology and varied with the number of rival males in the pool, suggesting mechanisms selecting for consistent differences in behaviour and social plasticity. Accounting for phenotype and context dependence improved the amount of variation in male mating success we explained statistically by 30–274%. Our analysis of the determinants of male mating success provides important insights into the evolutionary forces that shape phenotypic variation. In particular, our results suggest that sexual selection is likely to favour individual differences in behaviour, social plasticity (i.e., individuals adjusting their behaviour), niche preference (i.e., individuals dispersing to particular social conditions) or social niche construction (i.e., individuals modifying the social environment). The true effect of sexual traits can only be understood in interaction with the individual's phenotype and environment.
Lack of avian predators is associated with behavioural plasticity in nest construction and height in an island songbird
<p>Orange-crowned warblers, Leiothlypis celata sordida, breeding on the California Channel Islands exhibit remarkable variation in their nest structure and placement, providing an intriguing exception to the general pattern that avian nest structure and nest site selection are highly conserved characters. We examined nest construction at both the population and individual scale to test whether warblers on Santa Catalina Island change their nest construction in response to nest height. At the population level, warblers built both lighter, grass-dominated ground nests and heavier off-ground nests that contained more ridged materials and less grass. The probability of nest success was significantly and positively correlated with nest height. At the individual level, we found the same individuals were capable of building on- and off-ground nests between nesting attempts within the same season. However, nest construction was highly variable among individuals and not significantly correlated with nest success after controlling for nest height. We suggest this observed behavioural plasticity in nest construction and nest height is a hierarchical response to the absence of avian predators. Reduced risk from avian predators appears to allow the warblers to use a variety of nest sites, thereby necessitating increased flexibility in nest construction.</p>
Raw data for: Plastic responses of males and females interact to determine mating behaviour
<p>Individuals can respond plastically to variation in their social environment. However, each sex may respond to different cues and contrasting aspects of competition. Theory suggests that the plastic phenotype expressed by one sex can influence evolutionary dynamics in the other, and that plasticity simultaneously expressed by both sexes can exert sex-specific effects on fitness. However, data are needed to test this theory base. Here, we examined whether the simultaneous expression of adaptive plasticity by both sexes of <em>Drosophila melanogaster</em> fruit flies in response to their respective social environments interacts to determine the value of key reproductive traits (mating latency, duration and fecundity). To vary social environments, males were kept alone, or with same sex rivals, and females were kept alone, in same-sex, or mixed-sex groups. Matings were then conducted between individuals from all of these 5 social treatments in all combinations, and the resulting reproductive traits measured in both 'choice' and 'no choice' assays. Mating latency was determined by an interaction between the plastic responses of both sexes to their social environments. Interestingly, the mating latency response occurred in opposing directions in the different assays. In females exposed to same-sex social treatments, mating latency was more rapid with rival treatment males in the choice assays, but slower with those same males in no choice assays. In contrast, mating duration was determined purely by responses of males to their social environments, and fecundity purely by responses of females. Collectively, the results show that plastic responses represent an important and novel facet of sexual interactions.</p>
A model for the dissemination of circulating tumour cell clusters involving platelet recruitment and a plastic switch between cooperative and individual behaviours
<p>This folder includes live/dead cell counts as well as transwell assay data for the corresponding manuscript. </p>
Finotypic plasticity: Predator-induced plasticity in fin size, darkness, and display behaviour in a teleost fish
<p>Fish fins are remarkable devices of propulsion. Fin morphology is intimately linked to locomotor performance, and hence to behaviours that influence fitness, such as foraging and predator avoidance. This foreshadows a connection between fin morphology and variation in predation risk. Yet, whether prey can adjust fin morphology according to changes in perceived risk within their lifetime (a.k.a. predator-induced plasticity) remains elusive. </p> <p>Here, we quantify the structural size of five focal fins in crucian carp (Carassius carassius) following controlled manipulations to perceived predation risk (presence/absence of pike Esox lucius). We also assess if crucian carp respond to increased predation risk by shifts in dorsal fin colouration, and test for differences in how fish actively use their dorsal fins by quantifying the area of the fin displayed in behavioural trials. </p> <p>We find that crucian carp show phenotypic plasticity with regard to fin size as predator-exposed fish consistently have larger fins. Individuals exposed to perceived predation risk also increased dorsal fin darkness and actively displayed a larger area of the fin to potential predators. </p> <p>Our result thus provides compelling evidence for predator-induced fin enlargement, which should result in enhanced escape swimming performance. Moreover, fin-size plasticity may evolve synergistically with fin colouration and display behaviour, and we suggest that the adaptive value of this synergy is to enhance the silhouette of deep-bodied and hard-to-capture prey to deter gape-limited predators prior to an attack. Together, our results provide new perspectives on the role of predation risk for the development and evolution of fins. </p>
Data from: Evolution of cold tolerance and thermal plasticity in life history, behaviour and physiology during a poleward range expansion
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Raw data for: Plastic responses of males and females interact to determine mating behaviour
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Data for: Synchronous seasonal plasticity in colouration, behaviour, and visual gene expression in a wild butterfly population
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Lack of avian predators is associated with behavioural plasticity in nest construction and height in an island songbird
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Data from: Correlational selection on personality and social plasticity: morphology and social context determine behavioural effects on mating success
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Finotypic plasticity: Predator-induced plasticity in fin size, darkness, and display behaviour in a teleost fish
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Data from: Colour plasticity alters thermoregulatory behaviour in Battus philenor caterpillars by modifying the cue received
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Intercontinental test of constraint-breaking adaptations; testing behavioural plasticity in the face of a predator with novel hunting strategies
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Data and code from: Social plasticity and individuality shape variation in contest behaviour
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Raw data for: Plastic male mating behaviour evolves in response to the competitive environment
<p>Male reproductive phenotypes can evolve in response to the social and sexual environment. The expression of many such phenotypes may also be plastic within an individual's lifetime. For example, male <i>Drosophila melanogaster</i> show significantly extended mating duration following a period of exposure to conspecific male rivals. The costs and benefits of reproductive investment, and plasticity itself, can be shaped by the prevailing socio-sexual environment and by resource availability. We investigated these ideas using experimental evolution lines of <i>D. melanogaster </i>evolving under three fixed sex ratios (high, medium and low male-male competition) on either rich or poor adult diets. We found that males evolving in high-competition environments evolved longer mating durations overall. In addition, these males expressed a novel type of plastic behavioural response following exposure to rival males: they both significantly reduced and showed altered courtship delivery and exhibited significantly longer mating latencies. Plasticity in male mating duration in response to rivals was maintained in all of the lines, suggesting that the costs of plasticity were minimal. None of the evolutionary responses tested were consistently affected by dietary resource regimes. Collectively, the results show that fixed behavioural changes and new augmentations to the repertoire of reproductive behaviours can evolve rapidly.</p>
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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.