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67 results for “Social spider”
Data from: Collective aggressiveness limits colony persistence in high but not low elevation sites in Amazonian social spiders
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Data from: Task specialization in two social spiders, Stegodyphus sarasinorum (Eresidae) and Anelosimus eximius (Theridiidae).
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Data from: Body condition and food shapes group dispersal but not solitary dispersal in a social spider
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Data from: Fitness consequences of outcrossing in a social spider with an inbreeding mating system
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Metabolite profiling of the social spider Stegodyphus dumicola along a climate gradient
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Data from: Evolution of sociality in spiders leads to depleted genomic diversity at both population and species level
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Data from: Rain, predators, and spider sociality: a manipulative experiment
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Data from: Individual personalities shape task differentiation in a social spider
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Data from: The ecology of spider sociality – A spatial model
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Data from: Effects of host colony size and hygiene behaviors on social spider kleptoparasite loads along an elevation gradient
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Data from: Not just females: the socio-ecology of social interactions between spider monkey males
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Data from: Physical and social cues shape nest-site preference and prey capture behavior in social spiders
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Data from: Producers and scroungers: feeding type composition changes with group size in a socially foraging spider
In groups of socially foraging animals, feeding behaviour may change with group size in response to varying cost-benefit trade-offs. Numerous studies have described group size effects on group-average feeding behaviour, particularly emphasizing an increase in scrounging incidence for larger groups, where individuals (scroungers) feed from the food sources others (producers) discovered. However, individual variation in feeding behaviour remains unconsidered in the vast majority of these studies even though theoretical models presume individuals to specialize in feeding tactic and anticipate higher scrounger-type frequencies in larger groups. We combined group-level and individual-level analyses of group size effects on social foraging in the subsocial spider Australomisidia ergandros. Lending novel experimental support to model predictions, we found that individuals specialize in feeding tactic and that higher scrounging and lower producing incidence in larger groups were mediated through shifts in the ratio of feeding types. Further, feeding type specialization was not explained by innate individual differences in hunting ability as all feeding types were equally efficient in prey capture when foraging alone. Context adaptivity of feeding behaviour might allow this subsocial species to succeed under varying socioecological conditions.
Data from: Patterns of reproductive isolation in a haplodiploid – strong post‐mating, prezygotic barriers among three forms of a social spider mite
In speciation research, much attention is paid to the evolution of reproductive barriers, preventing diverging groups from hybridizing back into one gene pool. The prevalent view is that reproductive barriers evolve gradually as a byproduct of genetic changes accumulated by natural selection and genetic drift in groups that are segregated spatially and/or temporally. Reproductive barriers, however, can also be reinforced by natural selection against maladaptive hybridization. These mutually compatible theories are both empirically supported by studies, analyzing relationships between intensity of reproductive isolation and genetic distance in sympatric taxa and allopatric taxa. Here, we present the – to our knowledge – first comparative study in a haplodiploid organism, the social spider mite Stigmaeopsis miscanthi, by measuring premating and postmating pre- and postzygotic components of reproductive isolation, using three recently diverged forms of the mite that partly overlap in home range. We carried out cross experiments and measured genetic distances (mtDNA and nDNA) among parapatric and allopatric populations of the three forms. Our results show that the three forms are reproductively isolated, despite the absence of premating barriers, and that the postmating, prezygotic component contributes most to reproductive isolation. As expected, the strength of postmating reproductive barriers positively correlated with genetic distance. We did not find a clear pattern of prezygotic barriers evolving faster in parapatry than in allopatry, although one form did show a trend in line with the ecological and behavioral relationships between the forms. Our study advocates the versatility of haplodiploid animals for investigating the evolution of reproductive barriers.
Data from: Iterative evolution of increased behavioral variation characterizes the transition to sociality in spiders and proves advantageous
The evolution of group living is regarded as a major evolutionary transition and is commonly met with correlated shifts in ancillary characters. We tested for associations between social tendency and a myriad of abiotic variables and behavioral traits (e.g., boldness, activity level) in a clade of spiders that exhibit highly variable social structures.We found that social species tended to exhibit reduced aggressiveness towards prey, increased fearfulness towards predators, reduced activity levels, and occurred in warm, wet habitats with low wind velocities. Within-species variation in aggressiveness and boldness were greater in social species. We then assessed the functional consequences of within-species trait variation on reconstituted colonies of four species (A. eximius, A. rupununi, A. guacamayos, A. oritoyacu). We used colonies consisting of known ratios of docile versus aggressive individuals and group foraging success as a measure of colony performance.We found that groups composed of a mixture of docile and aggressive individuals outperformed monotypic groups: (1) mixed groups were more effective at subduing medium and large sized prey, and (2) mixed groups collectively gained more mass during shared feeding events. Our results suggest that the iterative evolution of depressed aggressiveness and increased within-species behavioral variation in social spiders is advantageous, and could be an adaptation to group living that is analogous to the formation of morphological castes within the social insects
Data from: Socially cued developmental plasticity in web-building spiders
Background: Socially cued anticipatory plasticity (SCAP) has been proposed as a widespread mechanism of adaptive life-history shifts in semelparous species with extreme male mating investment. Such mating systems evolved several times independently in spiders and male reproductive success should critically depend on timely maturation and rapid location of a receptive and, ideally, virgin female. We experimentally investigated socially cued anticipatory plasticity in two sympatric, closely related Nephila species that share many components of their mating systems, but differ in the degree to which male reproductive success depends on mating with virgin females. Juveniles of both species were reared either in the presence or absence of virgin female silk cues. We predicted strong selection on socially cued plasticity in N. fenestrata in which males follow a highly specialized terminal investment strategy, but expected a weaker plastic response in N. senegalensis in which males lost the ability to monopolize females. Results: Contrary to our predictions, N. fenestrata males presented with virgin female silk cues did not mature earlier than siblings reared isolated from such cues. Males in N. senegalensis, however, showed a significant response to female cues and matured several days earlier than control males. Plastic adjustment of maturation had no effect on male size. Conclusions: Our results indicate that a strong benefit of mating with virgins due to first male sperm priority does not necessarily promote socially cued anticipatory plasticity. We emphasize the bidirectional mode of developmental responses and suggest that this form of plasticity may not only yield benefits through accelerated maturation, but also by avoiding costs of precipitate maturation in the absence of female cues.
Data from: Behavioural responses vary with prey species in the social spider, Stegodyphus sarasinorum
Predators living in social groups often show consistent inter-individual differences in prey capture behaviour that may be linked to personality. Though personality predisposes individuals for certain behaviours, responses can also be influenced by context. Studies examining personality-dependent participation in prey capture have largely employed only one prey species, offering the predator no choice. In nature, predators encounter a range of prey species, therefore participation in or leading a prey capture event must also depend on prey attributes (for example, size and risk). In the social spider Stegodyphus sarasinorum, collective prey capture is mediated by personality types as a consequence of which some individuals are consistently more likely to attack. Here, we examined if an individual's consistency to attack persisted within and between the two prey species (honeybees and grasshoppers), and if the same individuals attacked first with both prey species. Our results showed that inter-individual differences in attacking persisted within- and between the two prey species. Spiders showed greater participation in attacking grasshoppers relative to bees. Identities of first attackers were not the same for bees and grasshoppers. Spiders showed greater consistency over time in attacking bees relative to grasshoppers. Bees attracted fewer attackers than size-matched grasshoppers. These results suggest that greater task specialization may be necessary to successfully subdue bees. Spiders handled bees more cautiously, which is likely to explain the observed plasticity in attacking the two prey species. Thus, participation in prey capture in social spiders is influenced by the attributes of prey species.
Data from: Iterative evolution of increased behavioral variation characterizes the transition to sociality in spiders and proves advantageous
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Data from: Patterns of reproductive isolation in a haplodiploid – strong post‐mating, prezygotic barriers among three forms of a social spider mite
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Data from: Collective behavior and colony persistence of social spiders depends on their physical environment
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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.