scholarly journals Mobbing-like response to secondary predator cues is not a form of teaching in meerkats

2020 ◽  
Author(s):  
Isabel Driscoll ◽  
Marta Manser ◽  
Alex Thornton
Keyword(s):  
Accurate Assessment ◽  
Predator Cues ◽  
Response Intensity ◽  
Suricata Suricatta ◽  
Multiple Contexts ◽  
Prediction Response ◽  
Size Number ◽  
Group Members ◽  
Predator Cue ◽  
The Individual

AbstractAcross many taxa, individuals learn how to detect, recognise and respond to predators via social learning. Learning to recognise and interpret predator cues is essential in the accurate assessment of risk. Cues can come directly from a predator’s presence (visual, acoustic) or from secondary predator cues (SPCs, such as hair/feathers, urine or faeces) left in the environment. Animals show various responses to encountering SPCs, which are thought to act in reducing risk to the individual. Meerkats, Suricata suricatta, show a response to SPCs not described in any other species: they display a mobbing-like behaviour. The function of this behaviour is unclear as unlike mobbing, the response it so closely resembles, it cannot serve to drive predators away. We used experiments to investigate whether adults may use this mobbing-like response to teach naïve young how to recognise and respond to predators. Meerkats are known to teach pups hunting skills, but there is as yet no evidence that any species other than humans teaches across multiple contexts. We used experimental presentations of SPCs to test whether wild adult meerkats respond more intensely to SPCs in the presence of naïve pups, as would be expected if the behaviour serves to promote learning. Contrary to this prediction, response intensity was lower when pups were present than when they were absent, and declined as the number of pups in the group increased, possibly due to costs associated with foraging with dependent young. Response intensity instead increased with increasing group size, number of group members interacting with the cue, and varied with predator cue type. These results suggest that the mobbing-like response to SPCs is not a form of teaching in meerkats. Instead, this behaviour may function to increase the recruitment of others to investigate the SPC. Exposing group members to SPCs may better inform them of the nature of the threat, facilitating more effective defensive group responses.

The Epistemology of Groups

2020 ◽  
Author(s):  
Jennifer Lackey
Keyword(s):  
Group Level ◽  
Social Significance ◽  
Individual Group ◽  
Key Concepts ◽  
Normative Requirements ◽  
Group Members ◽  
The Individual ◽  
Belief Justification ◽  
In Virtue Of ◽  
Trump Administration

Groups are often said to bear responsibility for their actions, many of which have enormous moral, legal, and social significance. The Trump Administration, for instance, is said to be responsible for the U.S.’s inept and deceptive handling of COVID-19 and the harms that American citizens have suffered as a result. But are groups subject to normative assessment simply in virtue of their individual members being so, or are they somehow agents in their own right? Answering this question depends on understanding key concepts in the epistemology of groups, as we cannot hold the Trump Administration responsible without first determining what it believed, knew, and said. Deflationary theorists hold that group phenomena can be understood entirely in terms of individual members and their states. Inflationary theorists maintain that group phenomena are importantly over and above, or otherwise distinct from, individual members and their states. It is argued that neither approach is satisfactory. Groups are more than their members, but not because they have “minds of their own,” as the inflationists hold. Instead, this book shows how group phenomena—like belief, justification, and knowledge—depend on what the individual group members do or are capable of doing while being subject to group-level normative requirements. This framework, it is argued, allows for the correct distribution of responsibility across groups and their individual members.

scholarly journals Decentralised sweetpotato (Ipomoea batatas) vine multiplication in Lake Zone, Tanzania: Five years later

2020 ◽  
Vol 5 (1) ◽  
pp. 677-689
Author(s):  
Margaret A. McEwan ◽  
Conny J. M. Almekinders ◽  
Moses S. Matui ◽  
Dorothy Lusheshanija ◽  
Mariana Massawe ◽  
...  
Keyword(s):  
Group Dynamics ◽  
Ipomoea Batatas ◽  
Water Access ◽  
Qualitative And Quantitative ◽  
Factors Influencing ◽  
Lake Zone ◽  
Norms And Values ◽  
Group Members ◽  
Market Factors ◽  
The Individual

AbstractFarmer-based seed multiplication is widely promoted by development practitioners, but there is limited understanding of the individual or collective motivations of farmers to engage or disengage in specialised seed production. The objective of this study is to understand the factors influencing the continuity of sweetpotato vine multiplication enterprises in the Lake Zone of Tanzania, five years after support from a project ended. A total of 81 out of 88 trained group or individual decentralised vine multipliers (DVMs) were traced to assess their vine multiplication activities. Qualitative and quantitative data were collected through telephone and field interviews. Our data showed that 40% of the 81 DVMs had sold vines in the year prior to the study and 20% had maintained the improved varieties for their own use. Some group members had continued vine sales as individuals. The DVMs’ reasons for abandoning vine multiplication included climatic and water access issues, market factors and group dynamics. The DVMs did not engage in high volumes of commercial sales. Socio-economic norms and values underpin the transactions of sweetpotato vines. These norms may undermine the emergence of commercially viable enterprises yet seem navigable for a substantial number of the DVMs. Group DVMs seem less commercially successful than individuals.

scholarly journals Task allocation and site fidelity jointly influence foraging regulation in honeybee colonies

2017 ◽  
Vol 4 (8) ◽  
pp. 170344 ◽  
Author(s):  
Thiago Mosqueiro ◽  
Chelsea Cook ◽  
Ramon Huerta ◽  
Jürgen Gadau ◽  
Brian Smith ◽  
...  
Keyword(s):  
Site Fidelity ◽  
Collective Behaviour ◽  
Trade Off ◽  
Agent Based ◽  
Resource Collection ◽  
Group Members ◽  
Collective Foraging ◽  
The Individual ◽  
Colony Level ◽  
And Task

Variation in behaviour among group members often impacts collective outcomes. Individuals may vary both in the task that they perform and in the persistence with which they perform each task. Although both the distribution of individuals among tasks and differences among individuals in behavioural persistence can each impact collective behaviour, we do not know if and how they jointly affect collective outcomes. Here, we use a detailed computational model to examine the joint impact of colony-level distribution among tasks and behavioural persistence of individuals, specifically their fidelity to particular resource sites, on the collective trade-off between exploring for new resources and exploiting familiar ones. We developed an agent-based model of foraging honeybees, parametrized by data from five colonies, in which we simulated scouts, who search the environment for new resources, and individuals who are recruited by the scouts to the newly found resources, i.e. recruits. We varied the persistence of returning to a particular food source of both scouts and recruits and found that, for each value of persistence, there is a different optimal ratio of scouts to recruits that maximizes resource collection by the colony. Furthermore, changes to the persistence of scouts induced opposite effects from changes to the persistence of recruits on the collective foraging of the colony. The proportion of scouts that resulted in the most resources collected by the colony decreased as the persistence of recruits increased. However, this optimal proportion of scouts increased as the persistence of scouts increased. Thus, behavioural persistence and task participation can interact to impact a colony's collective behaviour in orthogonal directions. Our work provides new insights and generates new hypotheses into how variations in behaviour at both the individual and colony levels jointly impact the trade-off between exploring for new resources and exploiting familiar ones.

scholarly journals Major Evolutionary Transitions in Social Insects, the Importance of Worker Sterility and Life History Trade-Offs

2021 ◽  
Vol 9 ◽  
Author(s):  
Abel Bernadou ◽  
Boris H. Kramer ◽  
Judith Korb
Keyword(s):  
Life History ◽  
Social Insects ◽  
Division Of Labour ◽  
Evolutionary Transitions ◽  
Individual Level ◽  
Individual Fitness ◽  
Trade Offs ◽  
Group Members ◽  
The Individual ◽  
Worker Sterility

The evolution of eusociality in social insects, such as termites, ants, and some bees and wasps, has been regarded as a major evolutionary transition (MET). Yet, there is some debate whether all species qualify. Here, we argue that worker sterility is a decisive criterion to determine whether species have passed a MET (= superorganisms), or not. When workers are sterile, reproductive interests align among group members as individual fitness is transferred to the colony level. Division of labour among cooperating units is a major driver that favours the evolution of METs across all biological scales. Many METs are characterised by a differentiation into reproductive versus maintenance functions. In social insects, the queen specialises on reproduction while workers take over maintenance functions such as food provisioning. Such division of labour allows specialisation and it reshapes life history trade-offs among cooperating units. For instance, individuals within colonies of social insects can overcome the omnipresent fecundity/longevity trade-off, which limits reproductive success in organisms, when increased fecundity shortens lifespan. Social insect queens (particularly in superorganismal species) can reach adult lifespans of several decades and are among the most fecund terrestrial animals. The resulting enormous reproductive output may contribute to explain why some genera of social insects became so successful. Indeed, superorganismal ant lineages have more species than those that have not passed a MET. We conclude that the release from life history constraints at the individual level is a important, yet understudied, factor across METs to explain their evolutionary success.

scholarly journals The analysis of individual Visegrad group members’ agrarian export sensitivity in relation to selected macroeconomic aggregations

2011 ◽  
Vol 59 (4) ◽  
pp. 327-342
Author(s):  
Miroslav Svatoš ◽  
Luboš Smutka
Keyword(s):  
Agricultural Trade ◽  
Added Value ◽  
The Czech Republic ◽  
Grocery Industry ◽  
Agricultural Exports ◽  
Group Members ◽  
The Subject ◽  
The Individual ◽  
High Degree ◽  
Visegrad Group

This paper analyzes the development of agricultural trade of the countries of the Visegrad Group with emphasis on development of the value of agricultural exports of the individual countries. The subject matter of the analysis is the sensitivity of the commodity structure of agricultural exports of individual countries and the identification of aggregations that are the least and the most sensitive to changes to the external and internal economic environment. From the conducted research, agricultural trade in the V4 countries was found to have developed very dynamically from 1993 to 2008, while the commodity structure of exports has constantly narrowed as the degree of specialization of the individual countries has increased (this applies especially to the Czech Republic, Slovakia and Hungary). From the results of analysis of sensitivity to changes of selected variables relating to the development of the value of agricultural exports of the individual V4 countries, it appears that the aggregations that react most sensitively to changes are those that are the subject of re-exports, followed by the aggregations that are characterized by a high degree of added value. In general it can be said that products of agricultural primary production exhibit less sensitivity in comparison with grocery industry products. This is confirmed by the general trend arising from the very nature of consumer behaviour.

scholarly journals Media Baru dan Potensi Terorisme Virtual

2012 ◽  
Vol 1 (1) ◽  
pp. 59-70
Author(s):  
Rulli Nasrullah
Keyword(s):  
Mental Representations ◽  
Multiple Identities ◽  
The Internet ◽  
Internet Users ◽  
Group Members ◽  
The Individual ◽  
Internet Medium ◽  
Police Commissioner ◽  
Different Characteristics ◽  
National Police

It is interesting to look at the Head of Criminal Investigation statement of the Indonesian National Police Commissioner General Ito Sumardi (Kompas, 22/9/2010), which warns that the crime of terrorism is closely related to ideology. Sociologist Van Dijk (1993) states that ideology is basically a mental system that is exchanged, represented both in the level of discourse and action to achieve certain goals or desires in a groups (defi ned as the system of mental representations and processes of group members). Why (technology) Internet so powerful in spreading the message of terrorism? First, the interaction happens on internet can be done anywhere and anytime. Second, Internet users in Indonesia, which is increasingly growing in number, allows access to the site or content to be easily obtained terrorism. Third, Internet medium provides access not only cheap but free. Fourth, the Internet allows anyone to construct new identity. In a fact proves that the identities of individuals in cyber world are individuals who have two possibilities, it could be the same or different identities as in the real world. Furthermore, the individual does not only have one identity per se on the internet, they could have multiple identities as well as different characteristics from each other. In according to Gilmore (1996), those on the Internet nobody knows you at all, not either knows your race or your sex. This is the opportunities that could be used by the perpetrators of terrorism to spread the ideology of terrorism and violence in the name of religion without worried their identity will be revealed. Key words: cybermedia, virtual terorism, internet, identity.

scholarly journals Drought decreases cooperative sentinel behavior and affects vocal coordination in meerkats

2019 ◽  
Vol 30 (6) ◽  
pp. 1558-1566 ◽  
Author(s):  
Ramona Rauber ◽  
Tim H Clutton-Brock ◽  
Marta B Manser
Keyword(s):  
Small Groups ◽  
Cooperative Behavior ◽  
Drought Condition ◽  
Drought Period ◽  
Suricata Suricatta ◽  
Naturally Occurring ◽  
Dry Conditions ◽  
Group Members ◽  
Fitness Benefits ◽  
Cooperative Behaviors

Abstract Cooperative breeding often evolved in harsh and arid habitats characterized by high levels of environmental uncertainty. Most forms of cooperative behavior have energetic costs and previous studies have shown that the contributions of individuals to alloparental provisioning are conditional on their food intake. However, the effect of naturally occurring, extreme environmental conditions on the persistence of costly forms of cooperative behaviors and their coordination by communication remain unknown. Here, we show that in meerkats (Suricata suricatta) the probability to act as sentinel, a cooperative vigilance behavior, was the same for typically occurring dry and wet conditions, but significantly reduced during a drought condition with almost no rain, especially in young individuals, members of small groups and groups with pups. The duration an individual stayed on sentinel guard, however, was most reduced during dry conditions. Besides reductions in sentinel behavior, the vocal coordination of foraging meerkats differed when comparing drought and wet conditions. Individuals responded more strongly to playbacks of sentinel “all-clear” calls and close calls, resulting in less vigilance and more foraging behavior during the drought condition. We conclude that while meerkats are adapted to commonly occurring dry periods with low rainfall, the extreme drought period with almost no rain, led to a decrease of the frequency of costly forms of cooperative behaviors in favor of behaviors that maximize direct fitness benefits and also affected the vocal coordination among group members.

Membership Rights: The Individual Rights of Group Members

2019 ◽  
Vol 32 (02) ◽  
pp. 343-364
Author(s):  
Adi Goldiner
Keyword(s):  
Human Rights ◽  
Legal Protection ◽  
Moral Rights ◽  
Social Categories ◽  
Group Rights ◽  
Reasonable Accommodations ◽  
Theoretical Inquiry ◽  
Group Members ◽  
The Individual ◽  
Distinct Features

AbstractIndividuals often invoke the moral rights that they hold as members of certain groups or social categories. Yet, there is ambiguity in both terminology and theorizing surrounding the nature of those rights. Focusing on the paradigmatic case of disabled people’s right to reasonable accommodations, this paper develops a descriptive account of those group-related rights, as a distinct category of rights which I call ‘membership rights’. Membership rights neither fit the concept of ‘human rights’, as not all people hold them, nor are they typical ’group rights’, as they are held by members of some group as individuals, not by groups collectively. In addition, the grounding of membership rights is linked to the distinct features of group members, be it their special interests or special circumstances. Finally, the content of membership rights includes distinct entitlements and correlating duties, which are not secured by human rights, group rights, or any combination thereof. Recognizing the distinct features of membership rights may have practical implications by strengthening efforts to secure legal protection to membership rights. It also invites further theoretical inquiry, for example, towards identifying other specific rights that fit into this category.

scholarly journals Parochial Versus Universal Cooperation: Introducing a Novel Economic Game of Within- and Between-Group Interaction

2019 ◽  
Vol 11 (1) ◽  
pp. 36-45 ◽  
Author(s):  
Hillie Aaldering ◽  
Robert Böhm
Keyword(s):  
Social Dominance ◽  
Social Dominance Orientation ◽  
Intergroup Conflict ◽  
Social Value Orientation ◽  
Group Interactions ◽  
Group Relations ◽  
Group Cooperation ◽  
Group Members ◽  
The Individual ◽  
Natural Groups

Engaging in personally costly within-group cooperation benefits one’s in-group members but also impacts other groups by benefiting, neglecting, or harming out-group members, leading to a range of potential consequences for between-group relations (e.g., collaboration vs. competition). We introduce the Intergroup Parochial and Universal Cooperation (IPUC) game to investigate the prevalence of the individual preferences underlying these different expressions of within-group cooperation: universalism, weak parochialism, and strong parochialism. In two online experiments with natural groups, we show that the IPUC has value beyond existing economic games in measuring these preferences separately. In a third experiment conducted in the lab, we show how dispositional measures traditionally associated with within- and between-group cooperation, that is, social value orientation, social dominance orientation, honesty-humility, and empathic concern, predict different preferences. Thus, the IPUC provides a tool to better understand within- and between-group interactions and to test interventions to overcome intergroup conflict.

On the Outside Looking In: Distress and Sympathy for Ethnic Victims of Violence by Out-Group Members

2017 ◽  
Vol 17 (3-4) ◽  
pp. 199-217
Author(s):  
Nakia S. Gordon ◽  
Samantha A. Chesney
Keyword(s):  
Emotion Regulation ◽  
Emotional Reactivity ◽  
Negative Emotions ◽  
Emotional Suppression ◽  
Group Evaluation ◽  
Before And After ◽  
Group Members ◽  
Victims Of Violence ◽  
The Individual ◽  
Abu Ghraib Prison

Abstract It is well documented that individuals respond with negative emotions to racial and ethnic out-groups. Yet, it is unknown whether the responses are a measure of simple emotional reactivity or if they are also influenced by emotion regulation. Given the importance of emotions in out-group evaluation (see Intergroup Emotion Theory; Smith and Mackie, 2008), we investigated emotional reactivity and regulation in response to out-group victimization. Forty-one undergraduates completed the Emotion Regulation Questionnaire and viewed three sets of images: lynching of African-Americans, torture of Abu Ghraib prison detainees, and iaps images depicting graphic violence. Participants rated 13 emotions before and after viewing the images. A factor analysis identified four emotional response categories: Distress, Sympathy, Arousal and Avoidance. Analyses at both the individual emotion level and factor level indicated that negative emotions (e.g., anger, disgust, and guilt) were greater in response to violence against ethnic groups relative to violence depicted in the iaps images. Emotional suppression predicted blunted distress and arousal to ethnic victimization. These findings highlight that emotional responses to out-group victimization are complex and tempered by emotional suppression. Individuals’ emotion regulation may provide further insight into responses to ethnic and racial out-groups.

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