The evolution of cooperative breeding by direct and indirect fitness effects

Science Advances, Год журнала: 2022, Номер 8(21)

Опубликована: Май 27, 2022

The evolution of cooperative breeding has been traditionally attributed to the effect kin selection. While there is increasing empirical evidence that direct fitness benefits are relevant, relative importance alternative selection mechanisms largely obscure. Here, we model coevolution cornerstones breeding, delayed dispersal, and alloparental care, across different ecological scenarios while allowing individuals adjust philopatry helping levels. Our results suggest (i) from grouping main driver for philopatry; (ii) mainly responsible emergence but group augmentation can be a sufficient promoter in harsh environments; (iii) care subject positive feedback; (iv) age-dependent dispersal triggered by both relatedness. Model predictions supported data provide good opportunities comparative analyses experimental tests causality.

Язык: Английский

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Social restructuring during harsh environmental conditions promotes cooperative behaviour in a songbird

Proceedings of the Royal Society B Biological Sciences, Год журнала: 2024, Номер 291(2021)

Опубликована: Апрель 17, 2024

Cooperation may emerge from intrinsic factors such as social structure and extrinsic environmental conditions. Although these might reinforce or counteract each other, their interaction remains unexplored in animal populations. Studies on multilevel societies suggest a link between structure, conditions individual investment cooperative behaviours. These exhibit flexible configurations, with stable groups that overlap associate hierarchically. Structure can be seasonal, upper-level units appearing only during specific seasons, lower-level persisting year-round. This offers an opportunity to investigate how cooperation relates Here, we study the seasonal society of superb fairy-wrens ( Malurus cyaneus ), observing responses experimental playback conspecific distress calls. Individuals engaged more helping behaviour less aggressive/territorial song harsher non-breeding season compared breeding season. The increase was greater for group members than same community, upper unit, comprised distinct association. Results drives switch cooperation, supporting hypothesis harsh

Язык: Английский

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Multilevel social structure predicts individual helping responses in a songbird

Current Biology, Год журнала: 2023, Номер 33(8), С. 1582 - 1587.e3

Опубликована: Март 9, 2023

Язык: Английский

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Defensive risk-taking in animals

Elsevier eBooks, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

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Climate, habitat and demography predict dispersal by an endangered bird in a fragmented landscape

Journal of Applied Ecology, Год журнала: 2025, Номер unknown

Опубликована: Март 25, 2025

Abstract Worldwide, biodiversity is threatened by human‐induced habitat degradation and fragmentation. Dispersal, particularly long‐distance dispersal between isolated fragments, key for population connectivity species persistence in the face of environmental change. However, we lack an understanding how fragmentation itself affect process. To identify conditions that promote or constrain connectivity, need to reveal habitat, demographic, climatic drive success distance. This challenging, however, because detecting events wild animals, especially over long distances, notoriously difficult. Here address this Endangered purple‐crowned fairy‐wren, Malurus coronatus , a small cooperatively breeding songbird which individuals can opt delay natal dispersal, are able consistently detect colour‐marked individuals, including distances. Thus, assessment drivers distance achievable. Using data from 17‐year study, analyse probability 796 206 (up 68 km). We show poorer quality associated with more frequent greater Additionally, low density promotes while higher rainfall (which increases food availability several months), during wet season, distance, at high densities. indicates that, when saturated, favourable may allow birds successfully disperse distances required connect fragments. Policy implications . Our findings suggest such require benign conditions, presumably limit its cost. results highlight integrate impacts climate change assessing connectivity. recommend conservation management actions targeted increasing source as important first step promoting fragments via dispersal.

Язык: Английский

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Determinants of hyena participation in risky collective action

Proceedings of the Royal Society B Biological Sciences, Год журнала: 2023, Номер 290(2011)

Опубликована: Ноя. 29, 2023

Collective action problems arise when cooperating individuals suffer costs of cooperation, while the benefits cooperation are received by both cooperators and defectors. We address this problem using data from spotted hyenas fighting with lions. Lions much larger kill many hyenas, so these fights require cooperative mobbing for them to succeed. identify factors that predict hyena groups engage in lions, which choose participate how victory distributed among non-cooperators. find is better predicted lower (no male more hyenas) than higher (need food). Individual participation facilitated social factors, over long term (close kin, bond strength) short (greeting interactions prior cooperation). Finally, we some direct participation: after participants were likely feed at contested carcasses non-participants. Overall, results consistent hypothesis that, animals face dangerous dilemmas, selection favours flexible strategies sensitive dynamic emerging multiple time scales.

Язык: Английский

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Increased density of conspecifics caused niche contraction in a multispecific passerine assemblage

Ecology, Год журнала: 2024, Номер 105(5)

Опубликована: Март 25, 2024

Abstract Competition is a prominent mechanism driving population dynamics and structuring community assemblage, which can be investigated by linking shifts in species’ ecological niche the densities of sympatric species because release from competitive constraints density‐dependent process. In this work we determine how steppe passerine segregates their niches evaluate role competition inducing changes species. We built multidimensional (with Gaussian kernel density estimators) using data on habitat features used 10 bird collected seven sites natural steppes Central Spain over 2 consecutive years. computed distance similarity metrics to explore partitioning community. Next, ran multivariate linear regression models effects conspecific heterospecific (as proxies intraspecific interspecific competition, respectively) breadth and/or position three most abundant found low overlap assemblage but varying levels among pairs species, could increase likelihood current operating However, no effect or position, although was negatively related breadth. Contrary predictions theory, increased conspecifics caused contraction. Our results multispecies system contribute advanced knowledge biotic mechanisms wildlife communities within framework theory.

Язык: Английский

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Allonursing in Wild and Farm Animals: Biological and Physiological Foundations and Explanatory Hypotheses

Animals, Год журнала: 2021, Номер 11(11), С. 3092 - 3092

Опубликована: Окт. 29, 2021

The dams of gregarious animals must develop a close bond with their newborns to provide them maternal care, including protection against predators, immunological transference, and nutrition. Even though lactation demands high energy expenditures, behaviors known as allonursing (the nursing non-descendant infants) allosuckling (suckling from any female other than the mother) have been reported in various species wild or domestic, terrestrial aquatic animals. These seem be elements multifactorial strategy, since reports suggest that they depend on following: species, living conditions, social stability, kinship relations, among group factors. Despite potential benefits, can place health welfare both non-filial alien offspring at risk, it augments probability pathogen transmission. This review aims analyze biological physiological foundations bioenergetic costs these behaviors, analyzing individual collective advantages disadvantages for dams' own offspring(s) neonate(s). We also include information animal which occur implications welfare.

Язык: Английский

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Kin do not always help: testing multiple hypotheses on nest feeding in a cooperatively breeding bird

Behavioral Ecology, Год журнала: 2022, Номер 33(6), С. 1080 - 1092

Опубликована: Авг. 18, 2022

Abstract In cooperatively breeding species, group members may derive multiple benefits from helping to raise other individuals’ offspring, yet not all individuals do so. this study, we tested predictions the “kin selection”, “pay-to-stay”, “group augmentation” and “skills” hypotheses, explain why feed nestlings of placid greenbuls (Phyllastrephus placidus). our study population, about 70% pairs were accompanied by subordinates, in 60% these cases at least one subordinate helped provisioning nestlings. total, 80% subordinates related or both breeders. accordance with selection” hypothesis, contrary “pay-to-stay” helpers first-order kin female (although relatedness male did variation helping) presence was associated increased survival pair. However, propensity help varied among members, as 46% Younger fed offspring more often than older ones, supporting hypotheses. support for hypothesis mixed since sex size additional effort. We argue that addition indirect direct benefits, also costs well types aside must be considered better understand behavior.

Язык: Английский

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Why help others? Insights from rodent to human early childhood research

Frontiers in Behavioral Neuroscience, Год журнала: 2023, Номер 17

Опубликована: Март 21, 2023

Helping behavior are actions aiming at assisting another individual in need or to relieve their distress. The occurrence of this not only depends on automated physiological mechanisms, such as imitation emotional contagion, that is, the individual’s emotion and state matching with others, but also needs motivation sustain. From a comparative developmental perspective, we discover for helping has deep foundation both phylogenetically ontogenetically. For example, empathic concern relieving personal distress desire social contact universal motivations across rodents, non-human primates human early childhoods. Therefore, circle-layered model integrating evidences from rodent childhood research is proposed: inner circle contains emotional-behavioral system outer affective-cognitive system. application significance behavioral neuroscience cultivating prosocial society.

Язык: Английский

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