scholarly journals Consensus of travel direction is achieved by simple copying, not voting, in free-ranging goats

2021 ◽  
Vol 8 (2) ◽  
pp. 201128
Author(s):  
D. W. E. Sankey ◽  
L. R. O'Bryan ◽  
S. Garnier ◽  
G. Cowlishaw ◽  
P. Hopkins ◽  
...  
Keyword(s):  
Decision Making ◽  
Group Living ◽  
Theoretical Models ◽  
Body Orientation ◽  
African Buffalo ◽  
Preferred Direction ◽  
Magnetometer Data ◽  
Golden Shiners ◽  
Active Communication ◽  
Free Ranging

For group-living animals to remain cohesive they must agree on where to travel. Theoretical models predict shared group decisions should be favoured, and a number of empirical examples support this. However, the behavioural mechanisms that underpin shared decision-making are not fully understood. Groups may achieve consensus of direction by active communication of individual preferences (i.e. voting), or by responding to each other's orientation and movement (i.e. copying). For example, African buffalo ( Syncerus caffer ) are reported to use body orientation to vote and indicate their preferred direction to achieve a consensus on travel direction, while golden shiners ( Notemigonus crysoleucas ) achieve consensus of direction by responding to the movement cues of their neighbours. Here, we present a conceptual model (supported by agent-based simulations) that allows us to distinguish patterns of motion that represent voting or copying. We test our model predictions using high-resolution GPS and magnetometer data collected from a herd of free-ranging goats ( Capra aegagrus hircus ) in the Namib Desert, Namibia. We find that decisions concerning travel direction were more consistent with individuals copying one another's motion and find no evidence to support the use of voting with body orientation. Our findings highlight the role of simple behavioural rules for collective decision-making by animal groups.

scholarly journals Coccidian oocyst and nematode egg counts of free-ranging African buffalo (Syncerus caffer) in the Kruger National Park, South Africa : research communication

2000 ◽  
Vol 71 (2) ◽  
Author(s):  
B.L. Penzhorn
Keyword(s):  
South Africa ◽  
National Park ◽  
Kruger National Park ◽  
African Buffalo ◽  
Syncerus Caffer ◽  
Research Communication ◽  
Nematode Eggs ◽  
Coccidian Oocyst ◽  
Free Ranging

Faecal specimens collected in the Kruger National Park from 103 African buffaloes (Syncerus caffer) up to 1 year old and 283 buffaloes older than 1 year were examined for the presence of coccidian oocysts and nematode eggs. Most specimens from animals older than 1 year had negative coccidian oocyst counts. Positive specimens from younger animals had significantly higher coccidian oocyst counts than those from older animals. No such difference was found for nematode egg counts.

scholarly journals Sneeze to leave: African wild dogs ( Lycaon pictus ) use variable quorum thresholds facilitated by sneezes in collective decisions

2017 ◽  
Vol 284 (1862) ◽  
pp. 20170347 ◽  
Author(s):  
Reena H. Walker ◽  
Andrew J. King ◽  
J. Weldon McNutt ◽  
Neil R. Jordan
Keyword(s):  
Decision Making ◽  
Group Living ◽  
High Energy ◽  
Relative Strength ◽  
Directed Group ◽  
Collective Decisions ◽  
African Wild Dogs ◽  
Minimum Number ◽  
Collective Movements ◽  
Wild Dogs

In despotically driven animal societies, one or a few individuals tend to have a disproportionate influence on group decision-making and actions. However, global communication allows each group member to assess the relative strength of preferences for different options among their group-mates. Here, we investigate collective decisions by free-ranging African wild dog packs in Botswana. African wild dogs exhibit dominant-directed group living and take part in stereotyped social rallies: high energy greeting ceremonies that occur before collective movements. Not all rallies result in collective movements, for reasons that are not well understood. We show that the probability of rally success (i.e. group departure) is predicted by a minimum number of audible rapid nasal exhalations (sneezes), within the rally. Moreover, the number of sneezes needed for the group to depart (i.e. the quorum) was reduced whenever dominant individuals initiated rallies, suggesting that dominant participation increases the likelihood of a rally's success, but is not a prerequisite. As such, the ‘will of the group’ may override dominant preferences when the consensus of subordinates is sufficiently great. Our findings illustrate how specific behavioural mechanisms (here, sneezing) allow for negotiation (in effect, voting) that shapes decision-making in a wild, socially complex animal society.

scholarly journals Multifunctionality of agriculture, public policies and scientific evidences: Some critical issues of contemporary controversies

2010 ◽  
Vol 4 (1-2) ◽  
pp. 53-58 ◽  
Author(s):  
Catherine Laurent ◽  
Marielle Berriet-Solliec ◽  
Marc Kirsch ◽  
Pierre Labarthe ◽  
AurélieT AurélieTrouvé
Keyword(s):  
Decision Making ◽  
Theoretical Models ◽  
Evidence Based ◽  
Evidence Based Practices ◽  
Policy Makers ◽  
Science And Policy ◽  
Public Policy Analysis ◽  
Critical Issues ◽  
The Status ◽  
New Situation

Various theoretical models of public policy analysis are used to treat situations of decision-making in which public deciders have to take into account the multifunctionality of agriculture. For some, science-society relations are not really problematical. Others acknowledge the current attempts of these policy-makers to find adequate scientific knowledge, and the difficulties they encounter. These difficulties stem partly from the very content of knowledge produced by research. Could other modes of production be more efficient? The status of the knowledge produced by these approaches is a subject of debate. Bridging the divide between science and policy more effectively is not only a question of knowledge brokerage.Accessibility and reliability of the existing evidences are also problems to be addressed. The debates around evidence-based practices may provide some landmarks in this new situation although they also emphasize the limits of the tools that can be built for this purpose.  

scholarly journals Apparent source levels and active communication space of whistles of free-ranging Indo-Pacific humpback dolphins (Sousa chinensis) in the Pearl River Estuary and Beibu Gulf, China

2016 ◽  
Author(s):  
Zhi-Tao Wang ◽  
Whitlow Au ◽  
Luke Rendell ◽  
Ke-Xiong Wang ◽  
Hai-Ping Wu ◽  
...  
Keyword(s):  
River Estuary ◽  
Pearl River Estuary ◽  
Pearl River ◽  
Beibu Gulf ◽  
Apparent Source ◽  
Communication Space ◽  
The Mean ◽  
Active Communication ◽  
The Pearl River ◽  
Free Ranging

Background. Knowledge of species-specific vocalization characteristics and their associated active communication space, the effective range over which a communication signal can be detected by a conspecific, is critical for understanding the impacts of underwater acoustic pollution, as well as other threats. Methods. We used a two-dimensional cross-shaped hydrophone array system to record the whistles of free-ranging Indo-Pacific humpback dolphins (Sousa chinensis) in shallow-water environments of the Pearl River Estuary (PRE) and Beibu Gulf (BG), China. Using hyperbolic position fixing, which exploits time differences of arrival of a signal between pairs of hydrophone receivers, we obtained source location estimates for whistles with good signal-to-noise ratio (SNR≥10 dB) and not polluted by other sounds and back-calculated their apparent source levels. Combining with the masking levels (including simultaneous noise levels, masking tonal threshold, and the Sousa auditory threshold) and the custom made site-specific sound propagation models, we further estimated their active communication space (ACS). Results. Humpback dolphins produced whistles with average root-mean-square apparent source levels (ASL) of 138.5 ± 6.8 (mean ± standard deviation) and 137.2 ± 7.0 dB re 1μPa in PRE (N=33) and BG (N=209), respectively. We found statistically significant differences in ASLs among different whistle contour types. The mean and maximum ACS of whistles were estimated to be 14.7 ± 2.6 (median ± quartiledeviation) and 17.1± 3.5 m in PRE, and 34.2 ± 9.5 and 43.5 ± 12.2 m in BG. Using just the auditory threshold as the masking level produced the mean and maximum ACSat of 24.3 ± 4.8 and 35.7± 4.6 m for PRE, and 60.7 ± 18.1 and 74.3 ± 25.3 m for BG. The small ACSs were due to the high ambient noise level. Significant differences in ACSs were also observed among different whistle contour types. Discussion. Besides shedding some light for evaluating appropriate noise exposure levels and information for the regulation of underwater acoustic pollution, these baseline data can also be used for aiding the passive acoustic monitoring of dolphin populations, defining the boundaries of separate groups in a more biologically meaningful way during field surveys, and guiding the appropriate approach distance for local dolphin-watching boats and research boat during focal group following.

Utilizing Emotions for Ethical Decision Making in Leadership

2015 ◽  
pp. 158-175
Author(s):  
Jennifer A. Griffith ◽  
Thomas A. Zeni ◽  
Genevieve Johnson
Keyword(s):  
Decision Making ◽  
Ethical Decision ◽  
Ethical Decision Making ◽  
Theoretical Models ◽  
Theoretical Research ◽  
Decision Making Process ◽  
Organizational Leaders ◽  
Emotional Component

Modern organizational leaders must rise to the challenge of making both ethically sound decisions as well as traditional fiscal decisions in order to remain competitive in today's marketplace. It is critical for leaders to be mindful of how emotions may assist or hinder them throughout the ethical decision-making process. Attempting to ignore the emotional component of ethical decision making or pretending that emotions do not exert influence on decisions is foolhardy and disregards both empirical and theoretical research suggesting otherwise. The challenge for leaders is how to best incorporate emotion into ethical decision making. This chapter examines several theoretical models of emotion and ethical decision making, applies theoretical and empirical findings to explain how two common emotions—anger and anxiety—impact ethical decision making, and provides recommendations for leaders seeking to improve ethical decision-making outcomes.

scholarly journals Host immunity, nutrition and coinfection alter longitudinal infection patterns of schistosomes in a free ranging African buffalo population

2017 ◽  
Vol 11 (12) ◽  
pp. e0006122 ◽  
Author(s):  
Brianna R. Beechler ◽  
Anna E. Jolles ◽  
Sarah A. Budischak ◽  
Paul L. A. M. Corstjens ◽  
Vanessa O. Ezenwa ◽  
...  
Keyword(s):  
Host Immunity ◽  
African Buffalo ◽  
Free Ranging

Ethical Decision-Making in Schools

2020 ◽  
Author(s):  
Özgür Önen ◽  
Burcu Tibet
Keyword(s):  
Decision Making ◽  
Intensity Factor ◽  
Ethical Decision ◽  
Ethical Decision Making ◽  
Theoretical Models ◽  
Intimate Relationship ◽  
Moral Intensity ◽  
Educational Organizations ◽  
Factors Affecting ◽  
Ethical Decisions

How many times do people encounter an ethical dilemma within a day? Many of them, probably, say more than one. Frequently encountering ethically questionable situations which have heavy costs to both business and educational organizations is very common. It is crucial to understand how teachers, for example, make decisions when they are faced with ethically questionable situations, such as intimate relationship offers or dishonest grading desires. Indeed, every individual involved with schools—not only teachers, but principals, students, and even parents—are faced with ethically questionable situations, forcing them to choose between right and wrong, possibly benefiting themselves or the ones they are close to and/or harming innocent others. So, increasing knowledge on how individuals make judgments and act when they are confronted a dilemma is important. Which factors affects ethical decisions? Do people simply choose the options granting their positions or beneficial for them in some way? A review of theoretical models of ethical decision-making revealed that existing models need to be modified in order to cover some ignored aspects. Additionally, there seems to be a need to add new constructs to the moral intensity factor: ease of the act and magnitude of the gain are possible issue contingents to be considered. Furthermore, empirical findings, in general, present contradictory results on proposed factors affecting ethical decision-making. However, some factors, such as moral intensity and reward–sanction systems, were found to consistently affect decisions on ethically questionable issues. There are, nonetheless, many finer points to be understood regarding what exactly is happening when people face dilemmas. This suggests new studies need to be conducted.

scholarly journals How do clinical psychologists make ethical decisions? A systematic review of empirical research

2020 ◽  
Vol 15 (4) ◽  
pp. 213-224
Author(s):  
Becky Grace ◽  
Tony Wainwright ◽  
Wendy Solomons ◽  
Jenna Camden ◽  
Helen Ellis-Caird
Keyword(s):  
Systematic Review ◽  
Decision Making ◽  
Empirical Research ◽  
Clinical Psychology ◽  
Ethical Decision ◽  
Ethical Decision Making ◽  
Theoretical Models ◽  
Future Research ◽  
Original Research ◽  
Ethical Decisions

Given the nature of the discipline, it might be assumed that clinical psychology is an ethical profession, within which effective ethical decision-making is integral. How then, does this ethical decision-making occur? This paper describes a systematic review of empirical research addressing this question. The paucity of evidence related to this question meant that the scope was broadened to include other professions who deliver talking therapies. This review could support reflective practice about what may be taken into account when making ethical decisions and highlight areas for future research. Using academic search databases, original research articles were identified from peer-reviewed journals. Articles using qualitative ( n = 3), quantitative ( n = 8) and mixed methods ( n = 2) were included. Two theoretical models of aspects of ethical decision-making were identified. Areas of agreement and debate are described in relation to factors linked to the professional, which impacted ethical decision-making. Factors relating to ethical dilemmas, which impacted ethical decision-making, are discussed. Articles were appraised by two independent raters, using quality assessment criteria, which suggested areas of methodological strengths and weaknesses. Comparison and synthesis of results revealed that the research did not generally pertain to current clinical practice of talking therapies or the particular socio-political context of the UK healthcare system. There was limited research into ethical decision-making amongst specific professions, including clinical psychology. Generalisability was limited due to methodological issues, indicating avenues for future research.

scholarly journals Grooming in Barbary macaques: better to give than to receive?

2007 ◽  
Vol 3 (3) ◽  
pp. 231-233 ◽  
Author(s):  
Kathryn Shutt ◽  
Ann MacLarnon ◽  
Michael Heistermann ◽  
Stuart Semple
Keyword(s):  
Social Life ◽  
Physiological Stress ◽  
Group Living ◽  
Lower Stress ◽  
Macaca Sylvanus ◽  
Barbary Macaques ◽  
Stress Levels ◽  
Free Ranging ◽  
To Receive ◽  
Grooming Behaviour

It is well established that grooming underpins sociality in group-living primates, and a number of studies have documented the stress-reducing effects of being groomed. In this study, we quantified grooming behaviour and physiological stress (assessed by faecal glucocorticoid analysis) in free-ranging Barbary macaques, Macaca sylvanus . Our results indicate that it is the giving rather than the receiving of grooming that is associated with lower stress levels. These findings shed important new light on the benefits of this key behaviour in primate social life.

Sign in / Sign up

Export Citation Format

Share Document