scholarly journals Not just passengers: pigeons, Columba livia , can learn homing routes while flying with a more experienced conspecific

2013 ◽  
Vol 280 (1750) ◽  
pp. 20122160 ◽  
Author(s):  
Benjamin Pettit ◽  
Andrea Flack ◽  
Robin Freeman ◽  
Tim Guilford ◽  
Dora Biro

For animals that travel in groups, the directional choices of conspecifics are potentially a rich source of information for spatial learning. In this study, we investigate how the opportunity to follow a locally experienced demonstrator affects route learning by pigeons over repeated homing flights. This test of social influences on navigation takes advantage of the individually distinctive routes that pigeons establish when trained alone. We found that pigeons learn routes just as effectively while flying with a partner as control pigeons do while flying alone. However, rather than learning the exact route of the demonstrator, the paired routes shifted over repeated flights, which suggests that the birds with less local experience also took an active role in the navigational task. The efficiency of the original routes was a key factor in how far they shifted, with less efficient routes undergoing the greatest changes. In this context, inefficient routes are unlikely to be maintained through repeated rounds of social transmission, and instead more efficient routes are achieved because of the interaction between social learning and information pooling.

Author(s):  
Michelle Baddeley

‘Social lives’ explores some of the main ways in which social influences drive behaviour, including aversion to unequal outcomes, trust and reciprocity, social learning, and peer pressure. The interplay between trust and reciprocity is a key element in many of the cooperative and collaborative activities that we undertake daily. There are two main types of inequity aversion: disadvantageous and advantageous. Social norms are another set of social influences that drive our behaviour, and these are often reinforced through peer pressure. They help to explain how and why we have evolved as a cooperative species, but how do we ensure that no-one free rides on others’ generosity?


Author(s):  
Hiroaki Kawamichi ◽  
Kazufumi Yoshihara ◽  
Ryo Kitada ◽  
Masahiro Matsunaga ◽  
Akihiro Sasaki ◽  
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Keyword(s):  

2018 ◽  
Vol 58 (5) ◽  
pp. 793-807 ◽  
Author(s):  
Ángela Martínez-Pérez ◽  
Dioni Elche ◽  
Pedro M. García-Villaverde ◽  
Gloria Parra-Requena

Radical innovation is a key factor for competitiveness in cultural tourism clusters. There is an open debate about the specific effect of relationships with cluster agents (bonding capital) on radical innovation due to redundancy of information and lock-in. This article aims to identify factors that influence radical innovation in the context of cultural tourism clusters. The empirical study uses original data on 215 firms located in UNESCO World Heritage Cities in Spain. The findings show that relationships with firms outside a cluster (bridging capital) reinforce the positive effect of relationships with agents within a cluster on radical innovation. However, relationships with local institutions weaken this effect. Combining relationships with internal agents and external ones is suggested. This study also advocates a more active role for local institutions as bridging agents.


2019 ◽  
Vol 14 (3) ◽  
pp. 299-301 ◽  
Author(s):  
Andrew M. Parker ◽  
Amanda F. Edelman ◽  
Katherine G. Carman ◽  
Melissa L. Finucane

ABSTRACTDisasters are typically unforeseen, causing most social and behavioral studies about disasters to be reactive. Occasionally, predisaster data are available, for example, when disasters happen while a study is already in progress or where data collected for other purposes already exist, but planned pre-post designs are all but nonexistent. This gap fundamentally limits the quantification of disasters’ human toll. Anticipating, responding to, and managing public reactions require a means of tracking and understanding those reactions, collected using rigorous scientific methods. Oftentimes, self-reports from the public are the best or only source of information, such as perceived risk, behavioral intentions, and social learning. Significant advancement in disaster research, to best inform practice and policy, requires well-designed surveys with large probability-based samples and longitudinal assessment of individuals across the life-cycle of a disaster and across multiple disasters.


2019 ◽  
Vol 22 (1) ◽  
pp. 85-112 ◽  
Author(s):  
Giuseppe Montalbano

AbstractAccording to most of the literature available so far, international and European cross-border banks and investments firms are considered the primary beneficiaries of the CMU and related revitalization of securitization. Nevertheless, an in-depth analysis of the transnational financial industry lobbying and influence, in the light of the final agreement on the securitization reform package, is still missing. This paper intends to fill this gap in the story by assessing if, and to what extent, the alleged industry beneficiaries played an active role in shaping the regulatory agenda within the CMU project and its related outcomes. An in-depth analysis of corporate lobbying in the securitization reform is thus provided, by looking at the interactions between structural and political contextual factors in shaping private/public coalitions along the different stages of the EU policy-making process. As it is argued here, the policy entrepreneurship of the European securitization industry has been the key factor to explain the emergence of the EU regulatory approach and its legislative outcomes.


Minerals ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 693 ◽  
Author(s):  
Borgomano ◽  
Fortin ◽  
Guéguen

Elastic wave velocities are key parameters in geosciences. In seismology at a large scale, or in seismic exploration at a more local and shallower scale, they were the main source of information for a long time. At the time of the Apollo mission, Anderson explained the unexpected result of very low velocities in Moon surface rocks by an intense cracking resulting from meteoritic impacts. Yet, it was also known that the Q factor was high. This could appear as a paradox. In the shallow layers of the Earth, rocks are porous. These shallow layers are of major importance in the Earth since they contain fluids. This is why velocities are higher and Q values lower in the Earth’s shallow layers than in the Moon’s shallow layers. Cracks have a determining effect on elastic properties because they are very compliant. Fluids also play a key role. Combining poroelasticity and effective elasticity, two independent theories much developed since the time of the Apollo mission, makes it possible to revisit the contrasting results observed in the Moon case and in the Earth case. Experimental results obtained on cracked synthetic glass show that dry cracks result in a strong decrease in velocity. On the other hand, saturated porous limestones exhibit a strong frequency-dependent attenuation when thermally cracked. The presence of fluid is the key factor.


Author(s):  
William Hoppitt ◽  
Kevin N. Laland

This chapter describes developmental methods for studying social learning. Developmental approaches can be broadly divided into two types. The first type includes approaches that involve collecting observational data on the development of a trait and the opportunities that arise for social learning, as well as attempting to infer the role of social learning. The second consists of developmental methods that involve experimental manipulations. The chapter begins by discussing some of the methods that have been applied to observational data on the development of traits in order to elucidate the social influences on development. In particular, it considers approaches for describing the developmental process, modeling the probability of acquisition and time of acquisition, modeling the proficiency of trait performance, and modeling option choice. The chapter also evaluates the limitations of observational data and concludes with an overview of experimental manipulation methods, including diffusion experiments, manipulation of social experience, and translocation experiments.


2015 ◽  
Vol 14 (3) ◽  
pp. 98-98
Author(s):  
Chris Roseveare ◽  

Many readers will be familiar with the challenges associated with the measurement of quality in acute medicine. The annual Society for Acute Medicine Benchmarking Audit (SAMBA) has attempted to map performance of acute medical units (AMUs) against quality standards established by SAM in 2011. The data presented in this autumn’s edition need to be interpreted with some caution – a single weekday in June is not necessarily representative of practice at other times of the year, and the figures are more than one year old, with the 2015 audit data currently being analysed. However the paper contains some interesting points which are worthy of comment. Overall, around 20% of patients waited more than 4 hours from arrival on the AMU before being seen by a ‘competent decision maker’, while more than a third of patients waited longer than the defined standard (8 hours during daytime and 14 hours after 5pm) to see a consultant. It should be noted, however that almost 70% of these patients passed through the Emergency Department (ED) prior to their arrival on the AMU, and many will therefore have already seen a senior ED clinician with a management plan being initiated. It is clearly important that Units who admit significant numbers of patients directly from General Practitioners are recording time delays for this group of patients, who should be subject to the same degree of rigorous prioritisation afforded to patients in the ED. It is also of interest that those patients least likely to fulfil all three of the defined standards were those who arrived on the AMU in the early evening period (5pm-10pm), while patients who arrive after 10pm were most likely to be seen within the appropriate time period. This is not surprising when one considers the way in which arrangements for consultant review are often designed, with morning ‘post take’ ward rounds enabling review of those patients who were admitted overnight. This needs to be addressed – 25% of patients arrived on the AMU during the evening period, and local experience suggests that many of these are patients referred directly by general practitioners. Many units now have a consultant presence on AMU until 8pm and some have extended this further to enable real-time consultant review of this cohort of patients later into the evening. Of the units which participated in SAMBA14, 97% were visited daily by a pharmacist. Pharmacists have clearly become an integral part of the AMU team over the past decade, and their value in performing medicines reconciliation is highlighted in Maria Richards’ article. While it is disappointing to read that the error rate in the medical drug history was so high for patients admitted to the AMU, accuracy was greater for patients sent in by general practitioners, suggesting that the availability of information at the time of clerking was a key factor. Widening access to, and use of the Summary Care Record, as recommended by the authors, would be a major step forward in reducing the risk associated with drug errors. Our ‘viewpoint’ section features two articles promoting different approaches to the interface between primary and secondary care. Stephen Gulliford has presented a year’s worth of data from his Ambulatory Emergency Care service in Wigan. The importance of a protected space in close proximity to the ED is demonstrated by the dramatic reduction in numbers of patients utilising the service when it was relocated due to local bed pressures. Overnight conversion of ambulatory care areas into bedded facilities may provide a temporary solution to operational pressures, but the knock-on impact can be significant. Ben Jamieson’s ambulatory service in Plymouth is staffed by General Practitioners, who also take calls from their colleagues working in the community. Utilising this model has enabled 50% of GP referrals to be managed without overnight admission, with a combination of clinical advice, ambulatory care and alternative pathways. Dr Jamieson highlights the complimentary skills which GPs can bring to an acute medicine team, although widespread adoption of this model might be limited by current recruitment challenges – which are apparently as great in general practice as they are in acute medicine.


2020 ◽  
Vol 91 (6) ◽  
pp. 622-629
Author(s):  
Samantha McLendon ◽  
Caroline R. Amoroso

Previous primate research has demonstrated social learning related to accepting novel foods, but little evidence suggests social learning of food avoidance. Ring-tailed lemurs (<i>Lemur catta</i>)<i></i>have been observed to shake their heads rapidly in response to sour and bitter stimuli. This study investigated whether this head-shaking behavior may have a social function. The experiment presented a performing lemur with two items of the same type of fruit, one of which had been manipulated to take on a sour flavor, and the other which was not manipulated and served as a control. The performer could taste each of the stimuli while an observing lemur had the opportunity to watch the performer’s behavior from an adjacent enclosure. The observer was then presented with two stimuli with the same qualities. This study evaluated whether a preceding head-shaking reaction by the performer improved the success rate of the observer avoiding bitter stimuli to greater than chance. Our results reveal that following a head shake by the performer in response to the sour stimuli, observer avoidance of sour stimuli was statistically greater than chance, indicating that there may be social influences on food avoidance in this species. Further research should focus on confirming this effect and characterizing the full set of socially influential food reaction behaviors.


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