scholarly journals Dominant convict cichlids (Amatitlania nigrofasciata) grow faster than subordinates when fed an equal ration

Behaviour ◽  
2011 ◽  
Vol 148 (8) ◽  
pp. 877-887 ◽  
Author(s):  
James W.A. Grant ◽  
Gavin Lee ◽  
Perry Comolli

AbstractPrevious studies indicate that dominant fish grow faster than subordinate fish when fed equal rations. It is unclear, however, whether this growth differential is caused by intrinsic differences related to their propensity to become dominant, or by the extrinsic effect of the social stress experienced by subordinates. We first tested whether dominant convict cichlids (Amatitlania nigrofasciata) grew faster than subordinates when fed an equal amount of food. Second, we tested whether the growth advantage of dominants occurred when only visual interactions were allowed between pairs of fish. Third, we randomly assigned social status to the fish to rule out the possibility that intrinsic differences between fish were responsible for both the establishment of dominance and the growth differences. In three separate experiments, dominant fish grew faster than size-matched subordinate convict cichlids, but the growth advantage of dominants was higher when there were direct interactions between fish compared to only visual interactions. Our results provide strong support for the hypothesis that the slower growth rate of subordinate fish was due to the physiological costs of stress.

2021 ◽  
pp. 003802612110162
Author(s):  
Nicholas Hookway ◽  
Dan Woodman

Today’s young people (youth and young adults) are routinely understood in generational terms, constructed as narcissistic and selfish in comparison with their predecessors. Despite announcements of a weakening commitment to values of kindness and generosity, there is little empirical research that examines these trends. The Australian Survey of Social Attitudes shows that young people are more likely to be kind but are less likely to think most Australians are kind. This article investigates this tension using focus groups with Australians of different ages (corresponding to major generational groupings) and drawing on the sociology of generations. To differentiate between generation, period and age/life-cycle effects requires longitudinal methods. However, these qualitative data suggest that a ‘generationalist’ discourse of young people as narcissistic is powerful in Australia and that young people are both internalising and challenging this framing. They appear to be responding to common experiences of growing up with the social and economic uncertainties of an ‘until-further-notice’ world and express strong support for values of kindness and openness to difference.


1981 ◽  
Vol 38 (2) ◽  
pp. 173-184 ◽  
Author(s):  
Patricia Aufderheide

Criminal justice records provide the historian with a wealth of data on social deviance, and on the role of the judiciary in defining and controlling it. They can as well comment on the most invisible group for the social historian: the “innocent bystanders,” the respectable folk who distinguish themselves neither by their power and influence nor by their deviance. This essay illustrates the value of one kind of judicial data, local criminal investigations in Brazil, to provide information on the working citizens of a community. Changes in the characteristics of that population may be indicative of wider social stress in the Brazilian Independence period.


PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e6535 ◽  
Author(s):  
Jennifer L. Snekser ◽  
Murray Itzkowitz

Monogamy can be either long-term or serial, with new pairs formed with each breeding bout. Costs and benefits are associated with each strategy. Because biparental convict cichlids (Amatitlania nigrofasciata) typically switch mates, exhibiting serial monogamy, we tested for the costs associated with forcing individuals to remain with the same mate. Convict cichlids were observed over two successive breeding bouts, either with the same or a new, equally experienced, mate. Parental behavior did not differ between breeding bouts, nor did brood size. Surprisingly, fish that remained with their original partner for a second bout took significantly longer to produce a brood compared to fish that paired with new partners. New partners were also more likely to successfully produce a second brood than re-mated partners. This is in contrast to the majority of bird studies that show many benefits to staying with the same partner for multiple broods. In convict cichlids, there seems to be no benefit associated with remaining with the same partner and switching mates reduces duration between broods for both males and females, potentially increasing overall reproductive success.


Author(s):  
Raid Khan ◽  
Amna Mahmood ◽  
Asif Salim

The Arab Spring was assumed to reform the prevailing regime pattern and to bring socio-economic reforms. However, it failed to get its intended outcomes at large. The objectives of the revolution that are to bring a positive transformation in the social, economic, and political domains were not attained effectively and was considered a failed revolution in the case of Egypt and Syria. The present paper focuses on exploring the reasons and factors behind its failure in the particular context of Egypt and Syria. Although Egypt observed regime transition from dictatorship to democracy, yet within one and a half year, a military coup overthrew the democratically elected government of Mohammad Morsi, and the military regime was reinstalled. In the case of Syria, since 2011, a civil war is going on where Bashar-ul-Asad still holds dictatorial powers. The study reveals that the lack of stable political institutions, weak democratic norms, and the absence of a vibrant civil society paved the way for state authorities to rule out the attempts of protestors. Excluding a few of the countries, the rest of the Middle Eastern countries are still ruled by the powerful elites. The successes of the Arab Spring are still to be awaited.


1983 ◽  
Vol 13 (4) ◽  
pp. 621-634 ◽  
Author(s):  
Leon Grunberg

This paper considers the interrelationships between the social relations of production, workers' safety, and the productivity of labor. The argument is that the social relations of production directly influence the intensity of labor (one facet of labor productivity), which in turn influences the rate of industrial accidents (one aspect of workers' safety). These relationships are illustrated with data from a carefully controlled comparison between two Chrysler plants in Europe in 1976 (Poissy in France and Ryton in England). The data are from internal company sources and are considered very reliable. The data show that Poissy had a higher labor productivity than Ryton, although both made the same car. This is partly accounted for by differences in the intensity of labor at the two plants. The evidence strongly suggests that a key reason for this difference lies in the contrasting nature of the social relations of production at the two plants. Ryton workers were better organized and more militant on the shop floor than were Poissy workers. Finally, it was found that the accident rate was about sixty times higher at Poissy than at Ryton, which provides strong support for the interrelationships proposed.


2021 ◽  
pp. c2-71
Author(s):  
Editors

buy this issue In 1884, important figures in England's budding socialist movement broke with the Social Democratic Federation over concealed jingoism and strong support for the British Empire. A similar division within the broad left on the issue of imperialism is threatening to reappear in our time.


Author(s):  
Moses Rumano ◽  
Rhoda Sommers

In this chapter the authors suggest that religious institutions are strategically and morally positioned to advocate for the inclusion of faculty from diverse backgrounds who will become the voice of the voiceless and the ambassadors for many historically oppressed and underrepresented groups in higher education. The successful integration of faculty from diverse backgrounds at predominantly European American religious institutions of higher education brings the much needed transformation into the social, spiritual, and academic lives of students. Through the lived experiences of six faculty members from diverse backgrounds serving at a variety of religious institutions, the authors discuss ways religious institutions of higher education can advocate for faculty from diverse backgrounds by adopting distinctive policies and beliefs, creating a strong support base through mentorship, and providing opportunities for professional growth to create a welcoming work environment.


Author(s):  
Clare Doherty ◽  
Michael Lang ◽  
James Deane ◽  
Regina Connor

This chapter explores how six constructs—control, trust, perceived risk, risk propensity, perceived legal protection, and privacy disposition—affect information disclosure on the Social Networking Site (SNS) Facebook. Building upon previous related work, an extended causal model of disclosure behaviour is proposed. The hypothesised relationships in this model were tested using survey data collected from 278 social networking site users in Ireland. The results of the analysis provide strong support for the proposed model.


Author(s):  
Monika Frąckowiak-Sochańska ◽  
◽  
Marcin Hermanowski

This paper aims to analyze the influence of the COVID-19 pandemic on the individuals’ mental conditions, focusing on psychotherapy clients. The sources of knowledge about mental condition changes analyzed here are psychotherapists’ reports. One of the research purposes was to examine to what extent the problems resulting from the pandemic are visible from the perspective of psychotherapists’ offices. Moreover, the authors explore the changes in psychotherapists’ functioning and the adjustments of psychotherapy understood as one of the expert systems in a late modern society affected by social changes’ trauma. Adopting the theory of social trauma (Alexander 2004, Sztompka 2002) as the frame of analysis enables examining the relation between personal but repeatable experiences of emotional crises and their global context determined by the pandemic. This paper’s empirical foundation is the survey research on a sample of 384 Polish psychotherapists carried out between August 10 and September 30 as a part of the project „Psychotherapeutic work in the pandemic time” supported by the Faculty of Sociology at Adam Mickiewicz University. The research results enable registering the increased intensity of problems resulting from social stress among people searching for psychotherapeutic support and those working in the helping professions. Simultaneously, changes in the functioning of the whole expert system of psychotherapy may be interpreted as the attempts to compensate for the social order destabilization that results in the growing stress and overburden of individuals.


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