Passing as an Indicator of Social Dominance Among Female Wild and Domestic Norway Rats

Behaviour ◽  
1991 ◽  
Vol 118 (1-2) ◽  
pp. 26-41 ◽  
Author(s):  
Terra Ziporyn ◽  
Martha K. McClintock

AbstractThe most frequent form of social interaction between pairs of wild or domestic rats (Rattus norvegicus) was passing behaviour in the narrow burrows and open field of seminatural environments. This behaviour occurs when a moving rat approaches another, either head-to-head or head-to-tail; the passed animal freezes while the passing rat continues, side touching side. The social dominance manifest by this behaviour correlated significantly with fighting dominance, particularly among female wild and domestic rats. In addition, dominance during displacements for access to food and water correlated with the dominance relationship in passing within pairs of domestic female rats. Although both passing and general activity had the same crepuscular daily rhythm, passing dominance did not correlate with individual differences in general activity level. Thus passing indicates social order and is not simply a by-product of general activity. Because passing occurs ten times more frequently than fights, in future studies it may be a more powerful indicator of female dominance and social order.

1965 ◽  
Vol 16 (3) ◽  
pp. 693-696 ◽  
Author(s):  
L. Glenn Collins

In two experiments involving 40 albino rats and two dosage levels of morphine sulfate it was found that relatively high analgesic dosages of morphine significantly depressed general activity level in the revolving drum. Also, there was a significant interaction between drug effect and hunger drive. In the case of moderate analgesic doses (7 mg/kg) no systematic effect of morphine on activity-wheel performance was noted.


1979 ◽  
Vol 48 (3_suppl) ◽  
pp. 1299-1305
Author(s):  
Patrick Maloney ◽  
Robert Deitchman ◽  
Kevin Walsh ◽  
Richard H. Haude

The effects of crowding and estrus cycling upon visual observing behavior and general activity level in the albino rat were investigated. Experimental groups were composed of non-estrus or estrus females and were subjected to one of three different crowding conditions. Measures of the frequency and duration of observing of photographic slides were taken as well as a measure of general activity. Slides were composed of either geometric patterns or color photographs depicting rats in various social postures. Contrary to previous reports, observing measures did not vary with levels of crowding or stage of estrus. There were, however, differences among the various crowded conditions on a measure of general activity. Relatively short-term crowding was shown to affect estrus based cyclical variation in activity and observing.


1999 ◽  
Vol 77 (8) ◽  
pp. 1196-1203 ◽  
Author(s):  
L David Mech

The prevailing view of a wolf (Canis lupus) pack is that of a group of individuals ever vying for dominance but held in check by the "alpha" pair, the alpha male and alpha female. Most research on the social dynamics of wolf packs, however, has been conducted on non-natural assortments of captive wolves. Here I describe the wolf-pack social order as it occurs in nature, discuss the alpha concept and social dominance and submission, and present data on the precise relationships among members in free-living packs, based on a literature review and 13 summers of observations of wolves on Ellesmere Island, Northwest Territories, Canada. I conclude that the typical wolf pack is a family, with the adult parents guiding the activities of the group in a division-of-labor system in which the female predominates primarily in such activities as pup care and defense and the male primarily during foraging and food-provisioning and the travels associated with them.


1958 ◽  
Vol 3 (6) ◽  
pp. 158-160
Author(s):  
LAWRENCE SCHLESINGER

1946 ◽  
Author(s):  
Georgene H. Seward
Keyword(s):  

Author(s):  
ROY PORTER

The physician George Hoggart Toulmin (1754–1817) propounded his theory of the Earth in a number of works beginning with The antiquity and duration of the world (1780) and ending with his The eternity of the universe (1789). It bore many resemblances to James Hutton's "Theory of the Earth" (1788) in stressing the uniformity of Nature, the gradual destruction and recreation of the continents and the unfathomable age of the Earth. In Toulmin's view, the progress of the proper theory of the Earth and of political advancement were inseparable from each other. For he analysed the commonly accepted geological ideas of his day (which postulated that the Earth had been created at no great distance of time by God; that God had intervened in Earth history on occasions like the Deluge to punish man; and that all Nature had been fabricated by God to serve man) and argued they were symptomatic of a society trapped in ignorance and superstition, and held down by priestcraft and political tyranny. In this respect he shared the outlook of the more radical figures of the French Enlightenment such as Helvétius and the Baron d'Holbach. He believed that the advance of freedom and knowledge would bring about improved understanding of the history and nature of the Earth, as a consequence of which Man would better understand the terms of his own existence, and learn to live in peace, harmony and civilization. Yet Toulmin's hopes were tempered by his naturalistic view of the history of the Earth and of Man. For Time destroyed everything — continents and civilizations. The fundamental law of things was cyclicality not progress. This latent political conservatism and pessimism became explicit in Toulmin's volume of verse, Illustration of affection, published posthumously in 1819. In those poems he signalled his disapproval of the French Revolution and of Napoleonic imperialism. He now argued that all was for the best in the social order, and he abandoned his own earlier atheistic religious radicalism, now subscribing to a more Christian view of God. Toulmin's earlier geological views had run into considerable opposition from orthodox religious elements. They were largely ignored by the geological community in late eighteenth and early nineteenth century Britain, but were revived and reprinted by lower class radicals such as Richard Carlile. This paper is to be published in the American journal, The Journal for the History of Ideas in 1978 (in press).


Author(s):  
S. A. Druzhilov

Drastic transformations of the social and labor sphere have led to the emergence of new health risks and sanitary and hygienic problems associated with unreliability of employment. A new socio-economic and psychological phenomenon “precarity” has emerged, which has aff ected the employment conditions of employees, so the description of the phenomenon “precarity” needs to be clarifi ed.The forms of labor employment that diff er from the typical model and worsen the employee’s situation are considered. The criteria based on which non-standard employment is considered unstable are given.Generalized types of unstable employment are identifi ed, the specifi city of which is determined by a combination of two factors: working time and the term of the contract. Unstable working conditions are possible not only in informal employment, but also in legal labor relations. Unreliability and instability of labor has an objective character and is a natural manifestation of the emerging economic and social order. The phenomenon of “precarity of employment” appears as a new determinant of the health of employees. The main feature when referring employment and labor relations to the phenomenon of “precarity” is their unreliability.Specifies the terms used: “precariat”; “precarious work”; precompact; the precariat. An essential characteristic of precarious employment is the violation of social and labor rights and lack of job security. A significant indicator of precarity is underemployment. Precarity induces the potential danger of dismissal of the employee and the resulting stress, psychosomatic disorders and pathological processes in the psyche.Precarious employment and related labor relations have become widespread. Many employees are deprived of social guarantees, including those related to labor safety, payment for holidays and temporary disability, and provision of preventive measures. Th is leads to a violation of the state of well-being, as well as the deterioration of individual and public health.


Mediaevistik ◽  
2020 ◽  
Vol 32 (1) ◽  
pp. 551-552
Author(s):  
Thomas Willard

Shakespeare is well known to have set two of his plays in and around Venice: The Merchant of Venice (1596) and The Tragedy of Othello, the Moor of Venice (1603). The first is often remembered for its famous speech about “the quality of mercy,” delivered by the female lead Portia in the disguise of a legal scholar from the university town of Padua. The speech helps to spare the life of her new husband’s friend and financial backer against the claims of the Jewish moneylender Shylock. The play has raised questions for Shakespearean scholars about the choice of Venice as an open city where merchants of all nations and faiths would meet on the Rialto while the city’s Senate, composed of leading merchants, worked hard to keep it open to all and especially profitable for its merchants. Those who would like to learn more about the city’s development as a center of trade can learn much from Richard Mackenney’s new book.


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