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18 results for “dominance status”
Fig. 1 in Dominance Hierarchy And Status Signalling In Captive Tree Sparrow (Passer Montanus) Flocks
Fig. 1. The relationship between badge size and dominance ranks in flock B (n= 9 birds, for statistics see Table 2). The most subordinate individual has rank 1
Data from: It's cool to be dominant: social status alters short-term risks of heat stress
Climate change has potential to trigger social change. As a first step towards understanding mechanisms determining the vulnerability of animal societies to rising temperatures, we investigated interactions between social rank and thermoregulation in three arid-zone bird species: fawn-coloured lark (Mirafra africanoides, territorial); African red-eyed bulbul (Pycnonotus nigricans, loosely social) and sociable weaver (Philetairus socius, complex cooperative societies). We assessed relationships between body temperature (Tb), air temperature (Ta) and social rank in captive groups in the Kalahari Desert. Socially dominant weavers and bulbuls had lower mean Tb than subordinate conspecifics, and dominant individuals of all species maintained more stable Tb as Ta increased. Dominant bulbuls and larks tended to monopolise available shade, but dominant weavers did not. Nevertheless, dominant weavers thermoregulated more precisely, despite expending no more behavioural effort on thermoregulation than subordinates. Increasingly unequal risks associated with heat stress may have implications for stability of animal societies in warmer climates.
Glucocorticoids of European bison in relation to their status: age, dominance, social centrality and leadership
<p>Dataset for the paper "Glucocorticoids of European bison in relation to their status: age, dominance, social centrality and leadership"</p> <p>Stress is the body's response to cope with the environment and generally better survive unless too much chronic stress persists. While some studies suggest that it would be more stressful to be the dominant individual of the group, others support the opposite hypothesis. Several variables can actually affect this relationship, or even cancel it. This study therefore aims to make the link between social status and the basal level of stress of 14 wild European bison (<em>Bison bonasus, </em>L. 1758) living together. We collected faeces and measured the faecal glucocorticoid metabolites (FGM). We showed that FGM is linked to different variables of social status of European bison, specifically age, dominance rank, eigenvector centrality but also to interactions between the variables. Preferential leaders in bison, <em>i.e</em>. the older and more dominant individuals which are more central ones, are less stressed compared to other group members. Measurement of such variables could thus be a valuable tool to follow and improve the conservation of species by collecting data on FGM and other social variables and adapt group composition or environmental conditions (e.g. supplement in food) according to the FGM concentration of herd individuals.</p>
Social dominance status is associated with differences in spatial cognitive flexibility in wild mountain chickadees
Social dominance has long been used as a model to investigate social stress. However, many studies using such comparisons have been performed in captive environments. These environments may produce unnaturally high antagonistic interactions, exaggerating the stress of social subordination and any associated adverse consequences. One such adverse effect concerns impaired cognitive ability, often thought to be associated with social subordination. Here, we tested whether social dominance rank is associated with differences in spatial learning and memory and in reversal spatial learning (flexibility) abilities in wild food-caching mountain chickadees at different montane elevations. Higher dominance rank was associated with higher spatial cognitive flexibility in harsh environments at higher elevations, but not at lower, milder elevations. In contrast, there were no consistent differences in spatial learning and memory ability associated with dominance rank. Our results suggest that spatial learning and memory ability in specialized food-caching species is a stable trait resilient to social influences. Spatial cognitive flexibility, on the other hand, appears to be more sensitive to environmental influences including social dominance. These findings contradict those from laboratory studies and suggest that it is critical to investigate the biological consequences of social dominance under natural conditions.
Data from: It's cool to be dominant: social status alters short-term risks of heat stress
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Urine washing and urinary odor profiles in relation to dominance rank status in wild male capuchin monkeys (Cebus imitator)
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Social dominance status is associated with differences in spatial cognitive flexibility in wild mountain chickadees
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Data from: Mitochondrial function predicts dominance status in brown trout
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Data from: Expressions of nitrate transporter genes reveal different nitrogen statuses of dominant diatom groups in the southern East China Sea
In this study, the mRNA levels of the Nrt2 nitrate transporter gene were used as a molecular indicator of nitrogen status in two dominant diatom groups, Skeletonema and Chaetoceros, which inhabit the southern East China Sea (ECS). To accurately interpret the abundance of Nrt2 transcripts in situ, maximum and minimum expression levels were determined under conditions of nitrogen deprivation and ammonium addition, respectively. In August 2010, Nrt2 transcript levels in Skeletonema at the inner shelf region exhibited a mean of 111 mmole/(mole EFL); at the mid-shelf region, the mean Nrt2 mRNA levels were 298 mmole/(mole EFL), which was very close to the maximum levels observed under nitrogen starvation. By contrast, the Nrt2 transcript levels in Chaetoceros were low at all of the shelf locations, except at one station in the mid-shelf region. The cross-shelf mean was 2.86 mmole/(mole EFL), which was similar to the expression levels observed in cultured Chaetoceros under conditions of sufficient ammonium. Similar expression patterns were observed in diatoms in the southern ECS in June 2011, but the Nrt2 transcript levels in Skeletonema at the inner shelf region were reduced to a mean of 28.6 mmole/(mole EFL). Regression analysis indicated that cell abundance and Nrt2 expression were closely related to the nutricline depth in the coastward half of the southern ECS for Skeletonema but not for Chaetoceros. These results indicate that the evaluated species differ in nitrogen status, which may reflect their evolutionary strategies to survive in a fluctuating marine environment.
Data from: Oxidative status and social dominance in a wild cooperative breeder
1. Oxidative stress has been proposed as a key mediator of life-history trade-offs, yet the social factors that affect patterns of oxidative states amongst individuals in animal societies remain virtually unexplored. 2. This is important, as rank-related differences in reproductive effort in many social species have the potential to generate, or indeed arise from, differences in oxidative state across dominance classes. 3. Here, we examine rank-related variation in oxidative states before and after a lengthy breeding season in a wild cooperatively breeding bird with high reproductive skew in the semi-arid zone of Southern Africa; the white-browed sparrow weaver (Plocepasser mahali). 4. Our findings reveal that prior to breeding, neither sex showed rank-related differences in markers of oxidative damage or antioxidant protection, suggesting that dominants' reproductive monopolies do not arise from superior pre-breeding oxidative states. 5. After breeding, however, females (who provision young at higher rates than males) suffered elevated oxidative damage, and dominant females (the only birds to lay and incubate eggs, and the primary nestling provisioners) experienced differential declines in antioxidant protection. 6. While males also showed reduced antioxidant capacity after breeding, this decline was rank-independent and not associated with elevated oxidative damage. 7. Our findings suggest that divisions of labour in animal societies can leave the hardest-working classes differentially exposed to oxidative stress, raising the possibility of hitherto unexplored impacts on health and ageing in social species.
Data from: Expressions of nitrate transporter genes reveal different nitrogen statuses of dominant diatom groups in the southern East China Sea
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Data from: Oxidative status and social dominance in a wild cooperative breeder
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Data from: Changes in dominance status erode personality and behavioral syndromes
The interplay between consistent individual differences in behavior (i.e., animal personality) and behavioral plasticity has recently attracted increased interest. We used male Australian field crickets (Teleogryllus oceanicus) to investigate how dominance status influences the consistency and plasticity of different personality traits, namely boldness, exploration, and activity, by experimentally manipulating dominance status between measuring sessions. We found that dominants that became subordinate when socially challenged, shifted their behavior, becoming less bold, explorative, and active, whereas subordinates that became dominant, became bolder, more explorative, and more active. Individuals that experienced no change in dominance status did not alter their behavior. Changes in dominance status reduced the repeatability of the putative personality traits of exploration and activity while not affecting the repeatability of boldness. Moreover, changes in dominance status affected the presence of correlations between some personality traits, but not others. Finally, calling behavior was related to current and future dominance and explorative tendencies. We discuss the broader evolutionary and ecological implications of our findings and propose that changes in social status should be considered when investigating behavioral syndromes and the interplay between animal personality and behavioral plasticity.
Taxonomic classification and dominance status of the 144 plant species analyzed in the study.
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Data from: Stress and early experience underlie dominance status and division of labour in a clonal insect
Cooperation and division of labour are fundamental in the "major transitions" in evolution. While the factors regulating cell differentiation in multicellular organisms are quite well understood, we are just beginning to unveil the mechanisms underlying individual specialization in cooperative groups of animals. Clonal ants allow studying which factors influence task allocation without confounding variation in genotype and morphology. Here, we subjected larvae and freshly hatched workers of the clonal ant Platythyrea punctata to different rearing conditions and investigated how these manipulations affected division of labour among pairs of oppositely treated, same-aged clonemates. High rearing temperature, physical stress, injury, and malnutrition increased the propensity of individuals to become subordinate foragers rather than dominant reproductives. This is reflected in changed gene regulation: early stages of division of labour were associated with different expression of genes involved in nutrient signalling pathways, metabolism, and the phenotypic response to environmental stimuli. Many of these genes appear to be capable of responding to a broad range of stressors. They might link environmental stimuli to behavioural and phenotypic changes and could therefore be more broadly involved in caste differentiation in social insects. Our experiments also shed light on the causes of behavioural variation among genetically identical individuals.
Data from: Changes in dominance status erode personality and behavioral syndromes
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Data from: Stress and early experience underlie dominance status and division of labour in a clonal insect
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Effects of housing environment, dominance status, and parity on the PBMC transcriptome of sows during gestation and lactation
GEO Series GSE234561. Sus scrofa. 56 samples. Type: Expression profiling by high throughput sequencing.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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