scholarly journals Spatial partial identity model reveals low densities of leopard and spotted hyaena in a miombo woodland

2020 ◽  
Author(s):  
R. S. Davis ◽  
E. L. Stone ◽  
L. K. Gentle ◽  
W. O. Mgoola ◽  
A. Uzal ◽  
...  
2016 ◽  
Author(s):  
Ben C. Augustine ◽  
J. Andrew Royle ◽  
Marcella J. Kelly ◽  
Christopher B. Satter ◽  
Robert S. Alonso ◽  
...  

Camera trapping surveys frequently capture individuals whose identity is only known from a single flank. The most widely used methods for incorporating these partial identity individuals into density analyses discard some of the partial identity capture histories, reducing precision, and while not previously recognized, introducing bias. Here, we present the spatial partial identity model (SPIM), which uses the spatial location where partial identity samples are captured to probabilistically resolve their complete identities, allowing all partial identity samples to be used in the analysis. We show that the SPIM out-performs other analytical alternatives. We then apply the SPIM to an ocelot data set collected on a trapping array with double-camera stations and a bobcat data set collected on a trapping array with single-camera stations. The SPIM improves inference in both cases and in the ocelot example, individual sex determined from photographs is used to further resolve partial identities, one of which is resolved to near certainty. The SPIM opens the door for the investigation of trapping designs that deviate from the standard 2 camera design, the combination of other data types between which identities cannot be deterministically linked, and can be extended to the problem of partial genotypes.


2000 ◽  
Vol 31 (4) ◽  
pp. 191-203 ◽  
Author(s):  
Kelly S. Fielding ◽  
Michael A. Hogg

Summary: A social identity model of effort exertion in groups is presented. In contrast to most traditional research on productivity and performance motivation, the model is assumed to apply to groups of all sizes and nature, and to all membership contingent norms that specify group behaviors and goals. It is proposed that group identification renders behavior group-normative and encourages people to behave in line with group norms. The effect should be strengthened among people who most need consensual identity validation from fellow members, and in intergroup contexts where there is inescapable identity threat from an outgroup. Together these processes should encourage people to exert substantial effort on behalf of their group.


2017 ◽  
Vol 225 (4) ◽  
pp. 324-335 ◽  
Author(s):  
Dimitrios Barkas ◽  
Xenia Chryssochoou

Abstract. This research took place just after the end of the protests following the killing of a 16-year-old boy by a policeman in Greece in December 2008. Participants (N = 224) were 16-year-olds in different schools in Attiki. Informed by the Politicized Collective Identity Model ( Simon & Klandermans, 2001 ), a questionnaire measuring grievances, adversarial attributions, emotions, vulnerability, identifications with students and activists, and questions about justice and Greek society in the future, as well as about youngsters’ participation in different actions, was completed. Four profiles of the participants emerged from a cluster analysis using representations of the conflict, emotions, and identifications with activists and students. These profiles differed on beliefs about the future of Greece, participants’ economic vulnerability, and forms of participation. Importantly, the clusters corresponded to students from schools of different socioeconomic areas. The results indicate that the way young people interpret the events and the context, their levels of identification, and the way they represent society are important factors of their political socialization that impacts on their forms of participation. Political socialization seems to be related to youngsters’ position in society which probably constitutes an important anchoring point of their interpretation of the world.


2018 ◽  
Vol 125 (2) ◽  
pp. 245-269 ◽  
Author(s):  
Immo Fritsche ◽  
Markus Barth ◽  
Philipp Jugert ◽  
Torsten Masson ◽  
Gerhard Reese

2021 ◽  
Vol 13 (11) ◽  
pp. 5935
Author(s):  
Beatriz Carmona-Moya ◽  
Antonia Calvo-Salguero ◽  
María-del-Carmen Aguilar-Luzón

The deterioration and destruction of the environment is becoming more and more considerable and greater efforts are needed to stop it. To accomplish this feat, all members of society must identify with solving environmental problems, environmental collective action being one of the most relevant means of doing so. From this perspective, the analysis of the psychosocial factors that lead to participation in environmental collective action emerges as a priority objective in the research agenda. Thus, the aim of this study is to examine the role of “environmental identity”, as conceptualized by Clayton, as a central axis for explaining environmental collective action. The inclusion of the latter in the theoretical framework of the SIMCA (social identity model of collective action) model gives rise to the model that we have called EIMECA (environmental identity model of environmental collective action). Two studies were conducted (344 and 720 participants, respectively), and structural equation modeling was used. The results reveal that environmental identity and a variety of negative emotional affects, as well as group efficacy, accompanied by hope for a simultaneous additive effect, are critical when it comes to predicting environmental collective action.


2012 ◽  
Vol 21 (3) ◽  
pp. 153-166 ◽  
Author(s):  
Jean Suvatjis ◽  
Leslie de Chernatony ◽  
John Halikias

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