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Author |
Reeve, H.K. |
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Title |
Queen activation of lazy workers in colonies of the eusocial naked mole-rat |
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Year |
1992 |
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Nature |
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Nature |
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358 |
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147-149 |
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10.1038/358147a0 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4921 |
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Author |
Ehardt, C.L.; Bernstein, I.S. |
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Title |
Conflict intervention behaviour by adult male macaques: structural and functional aspects |
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Year |
1992 |
Publication |
Coalitions and Alliances in Humans and Other Animals |
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83-111 |
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Oxford University Press |
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Oxford |
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Harcourt, A.H.; de Waal, F.B.M. |
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Equine Behaviour @ team @ |
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4926 |
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Author |
Schneider, K. |
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Title |
Emotionen |
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Book Chapter |
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Year |
1992 |
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Allgemeine Psychologie |
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Verlag Hans Huber |
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Bern |
Editor |
Spada Hans |
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3456823029 |
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Equine Behaviour @ team @ |
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5070 |
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Author |
Lamprecht, J. |
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Title |
Variable Leadership in Bar-Headed Geese (Anser Indicus) : an Analysis of Pair and Family Departures |
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Journal Article |
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Year |
1992 |
Publication |
Behaviour |
Abbreviated Journal |
Behaviour |
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122 |
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1-2 |
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105-119 |
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This paper reports quantitative leadership differences in semi-captive bar-headed geese (Anser indicus) at different times of the year, and in different types of groups. Leading is defined here as causing the departure or determining the direction of movement of the whole group. No permanent and exclusive leader of a pair or family group was found, rather relative leading frequencies of male, female and young showed a definite shifting pattern. Females led more often than their mates prior to breeding, and on nest pauses during the incubation period, but less often in summer, autumn and early winter. In families there was no difference between the frequencies of male and female leading. Family females led relatively more often than those of pairs without offspring. This difference was related to the presence, not the number, of young. Goslings led the family about as often as the parents during the rearing period in early summer, less often in autumn, winter and next spring. Such differences and changes are to be expected where competence in particular tasks and dependence on partners vary between group members, and where different situations require different abilities. For the geese, the results can be related to the different options of group members and to the different benefits they derive from leaving (or 'staying put') or following (or waiting for the others) in different situations. |
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Equine Behaviour @ team @ |
Serial |
5128 |
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Author |
Krause, J.; Bumann, D.; Todt, D. |
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Title |
Relationship between the position preference and nutritional state of individuals in schools of juvenile roach (Rutilus rutilus) |
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Journal Article |
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Year |
1992 |
Publication |
Behavioral Ecology and Sociobiology |
Abbreviated Journal |
Behav. Ecol. Sociobiol. |
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30 |
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3 |
Pages |
177-180 |
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Position preferences of well-fed and food-deprived juvenile roach were investigated in schools of 2 and 4 fish in the laboratory. Food-deprived fish appeared significantly more often in the front position than their well-fed conspecifics. For fish at the same hunger level, individuals at the front of the school had the highest feeding rate. These results represent the first evidence for a relationship between the nutritional state of individual fish and their positions in a school and suggest a functional advantage of the preference. |
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Equine Behaviour @ team @ |
Serial |
5140 |
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Author |
Zabel, C. J.; Glickman, S. E.; Frank, L. G.; Woodmansee, K. B.; Keppel, G. |
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Title |
Coalition formation in a colony of prepubertal spotted hyaenas |
Type |
Book Chapter |
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Year |
1992 |
Publication |
Coalitions and Alliances in Humans and Other Animals |
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Pages |
113–135 |
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Oxford University Press |
Place of Publication |
Oxford |
Editor |
Harcourt, A.H.; de Waal, F.B.M. |
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Equine Behaviour @ team @ |
Serial |
5232 |
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Author |
Silk, J. B. |
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Title |
Patterns of intervention in agonistic contests among male bonnet macaques |
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Book Chapter |
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Year |
1992 |
Publication |
Coalitions and Alliances in Humans and Other Animals |
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215-232 |
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Oxford University Press |
Place of Publication |
Oxford |
Editor |
Harcourt, A.H., and de Waal, F.B.M. |
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Call Number |
Equine Behaviour @ team @ |
Serial |
5234 |
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Author |
Connor, R. C.; Smokler, R. A.; Richards, A. F. |
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Title |
Dolphin alliances and coalitions |
Type |
Book Chapter |
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Year |
1992 |
Publication |
Coalitions and Alliances in Humans and Other Animals |
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415-443 |
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Oxford University Press |
Place of Publication |
Oxford |
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Harcourt, A.H.;de Waal, F.B.M. |
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Equine Behaviour @ team @ |
Serial |
5238 |
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Author |
Romano, N.; Vitale, F.; Alesi, D.R.; Bonura, F.; La Licata, R.; Intonazzo, V.; Dardanoni, G.; Mammina, C. |
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Title |
The changing pattern of human immunodeficiency virus type 1 infection in intravenous drug users. Results of a six-year seroprevalence study in Palermo, Italy |
Type |
Journal Article |
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Year |
1992 |
Publication |
American Journal of Epidemiology |
Abbreviated Journal |
Am J Epidemiol |
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Volume |
135 |
Issue |
11 |
Pages |
1189-1196 |
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Acquired Immunodeficiency Syndrome/*epidemiology; Adolescent; Adult; Chi-Square Distribution; Cross-Sectional Studies; Female; HIV Antibodies/blood; HIV Infections/*epidemiology; HIV Seroprevalence/*trends; *Hiv-1; Hepatitis B Antibodies/blood; Hepatitis B Surface Antigens/blood; Heroin; Humans; Incidence; Italy/epidemiology; Logistic Models; Male; Multivariate Analysis; Odds Ratio; Prevalence; Risk Factors; Substance Abuse, Intravenous/*epidemiology; Time Factors |
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A cross-sectional seroepidemiologic study was carried out between 1985 and 1990 in 1,567 heterosexual intravenous drug users who had been seen at the AIDS Regional Reference Center in Palermo, Italy, to evaluate the rate of human immunodeficiency virus type 1 (HIV-1) seroprevalence in this group and its long-term trend. Sixty serum samples collected from drug users in 1980 and 1983, before the founding of the Center (1985), were tested as well. Some demographic and behavioral risk factors were studied in a subgroup of intravenous drug users enrolled in 1985, 1987, and 1990 for their possible association with HIV-1. These factors were also studied in relation to hepatitis B virus infection, since both viruses share the same modes of spread. These drug users had a higher prevalence of markers for hepatitis B virus than of HIV-1 antibodies, and the prevalence rates in sera collected declined over time for both infections. The presence of both antibodies to HIV-1 and markers for hepatitis B virus was independently associated with the age of the drug user, the duration of drug use, and the year of serum collection. Antibodies to HIV-1 were observed more frequently in females than in males. No relation was found between education or employment status and the presence of HIV-1 antibodies or hepatitis B virus markers. Although new HIV-1 infections still occur, the decline in seroprevalence observed at the end of the 1980s might be related to modifications in social behavior among newer drug users, partial exhaustion of the susceptible population, and increasing risk awareness in more experienced users. |
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Giuseppe D'Alessandro Department of Hygiene and Microbiology, School of Medicine, University of Palermo, Italy |
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English |
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0002-9262 |
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Notes |
PMID:1626537 |
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Call Number |
Equine Behaviour @ team @ |
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5258 |
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Author |
Noë, R. |
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Title |
Alliance formation among male hamadryas baboons: shopping for profitable partners |
Type |
Book Chapter |
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Year |
1992 |
Publication |
Coalitions and alliances in humans and other animals |
Abbreviated Journal |
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Volume |
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Pages |
284-321 |
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Oxford University Press |
Place of Publication |
Oxford |
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Harcourt, A.H.; deWaal, F.B.M. |
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Equine Behaviour @ team @ |
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5405 |
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