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Author Reeve, H.K. url  doi
openurl 
  Title Queen activation of lazy workers in colonies of the eusocial naked mole-rat Type Journal Article
  Year 1992 Publication Nature Abbreviated Journal Nature  
  Volume 358 Issue Pages 147-149  
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  Notes (up) 10.1038/358147a0 Approved no  
  Call Number Equine Behaviour @ team @ Serial 4921  
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Author Dugatkin, L.A. url  openurl
  Title Tendency to inspect predators predicts mortality risk in the guppy (Poecilia reticulata) Type Journal Article
  Year 1992 Publication Behavioral Ecology Abbreviated Journal Behav. Ecol.  
  Volume 3 Issue 2 Pages 124-127  
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  Abstract Although predator inspection behavior in fishes has become a model system for examining game theoretical strategies such as Tit for Tat, the direct costs of inspection behavior have not been quantified. To begin quantifying such costs, I conducted an experiment that examined mortality due to predation as a function of predator inspection in the guppy (Poecilia reticulata). Before being subjected to a “survivorship” experiment, guppies were assayed for their tendency to inspect a predator. Groups were then composed of six guppies that differed in their tendency to inspect. These groups were placed into a pool containing a predator, and survivorship of guppies with different inspection tendencies was noted 36 and 60 h later. Results indicate that individuals that display high degrees of inspection behavior suffer greater mortality than their noninspecting shoalmates.  
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  Notes (up) 10.1093/beheco/3.2.124 Approved no  
  Call Number refbase @ user @ Serial 526  
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Author Elzenga, J. W, url  openurl
  Title Why zebras are striped Type Journal Article
  Year 1992 Publication Swara Abbreviated Journal Swara  
  Volume 15 Issue 4 Pages 28-30  
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  Notes (up) from Professor Hans Klingels Equine Reference List Approved yes  
  Call Number Serial 1068  
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Author Winkler A, openurl 
  Title The feeding ecology of the Cape Mountain zebra in the Mountain Zebra National Park Type Manuscript
  Year 1992 Publication Abbreviated Journal  
  Volume Issue Pages  
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  Abstract  
  Address  
  Corporate Author Thesis Doctoral thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
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  Series Volume Series Issue Edition  
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  Area Expedition Conference  
  Notes (up) from Professor Hans Klingels Equine Reference List Approved yes  
  Call Number Serial 1713  
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Author Duncan P, isbn  openurl
  Title Zebras, asses, and horses Type Book Whole
  Year 1992 Publication Kelvyn Press USA Abbreviated Journal  
  Volume Issue Pages  
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  Abstract Provides summaries of the conservation status, biology, and ecology of wild zebras, asses, and horses. The Action Plan presents chapters on taxonomy, genetics, reproductive biology, population dynamics, management, disease and epidemiology, and the importance of developing an assessment methodology that considers the role of equids in ecosystems.  
  Address  
  Corporate Author Thesis  
  Publisher Kelvyn Press Place of Publication Broadview, Illinois Editor  
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  ISSN ISBN 978-2831700564 Medium  
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  Notes (up) from Professor Hans Klingels Equine Reference List JA - Approved yes  
  Call Number Serial 1032  
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Author Detmer, D. openurl 
  Title Response: of pigs and primitive notions Type Journal Article
  Year 1992 Publication Between the Species : a Journal of Ethics Abbreviated Journal Between Species  
  Volume 8 Issue 4 Pages 203-208  
  Keywords Agriculture; *Animal Rights; Animals; *Animals, Genetically Modified; Humans; Self Concept; Stress, Psychological; Genetics and Reproduction  
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  Language English Summary Language Original Title  
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  Notes (up) PMID:12091951; KIE: 9 fn.; KIE: KIE BoB Subject Heading: genetic intervention Approved no  
  Call Number Equine Behaviour @ team @ Serial 4156  
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Author Kirkpatrick, J.F.; Liu, I.M.; Turner, J.W.J.; Naugle, R.; Keiper, R. openurl 
  Title Long-term effects of porcine zonae pellucidae immunocontraception on ovarian function in feral horses (Equus caballus) Type Journal Article
  Year 1992 Publication Journal of reproduction and fertility Abbreviated Journal J Reprod Fertil  
  Volume 94 Issue 2 Pages 437-444  
  Keywords Animals; Contraception, Immunologic/*veterinary; *Egg Proteins; Estrogens, Conjugated (USP)/urine; Female; Glycoproteins/*pharmacology; Horses/immunology/*physiology; *Membrane Glycoproteins; Ovary/drug effects/*physiology; Progesterone/metabolism; *Receptors, Cell Surface; Swine/immunology; Time Factors; Zona Pellucida/*immunology  
  Abstract Ten feral mares free-roaming in Maryland, USA, were inoculated with porcine zonae pellucidae (PZP) protein before the breeding season for three consecutive years (1988-90). Ovarian function was monitored for 51 days during the peak of the breeding season after the third annual PZP inoculation, in seven of these mares and in four untreated control mares, by means of urinary oestrone conjugates and nonspecific progesterone metabolites. None of the ten inoculated mares became pregnant in 1990, compared with 55% of 20 control mares, which included two of the four monitored for ovarian function. Three of the untreated mares demonstrated apparent normal ovarian activity, characterized by preovulatory oestrogen peaks, concurrent progesterone nadirs at ovulation, breeding activity, and luteal-phase progesterone increases after ovulation. Two of the seven monitored PZP-treated mares demonstrated ovulatory cycles that did not result in conception. One was pregnant as a result of conception in 1989 and demonstrated a normal, late-gestation, endocrine profile. The remaining four PZP-treated mares revealed no evidence of ovulation, and urinary oestrogen concentrations were significantly depressed. The experiments indicated that (i) a third consecutive annual PZP booster inoculation is greater than 90% effective in preventing pregnancies in mares and (ii) three consecutive years of PZP treatment may interfere with normal ovarian function as shown by markedly depressed oestrogen secretion.  
  Address Deaconess Research Institute, Billings, MT 59102  
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  Series Volume Series Issue Edition  
  ISSN 0022-4251 ISBN Medium  
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  Notes (up) PMID:1317449 Approved no  
  Call Number refbase @ user @ Serial 145  
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Author Dugatkin, L.A.; Godin, J.G. doi  openurl
  Title Reversal of female mate choice by copying in the guppy (Poecilia reticulata) Type Journal Article
  Year 1992 Publication Proceedings. Biological sciences / The Royal Society Abbreviated Journal Proc Biol Sci  
  Volume 249 Issue 1325 Pages 179-184  
  Keywords Acclimatization; Animals; *Choice Behavior; Female; Male; Poecilia; *Sexual Behavior, Animal  
  Abstract Ever since Fisher (1958) formalized models of sexual selection, female mate choice has been assumed to be a genetically determined trait. Females, however, may also use social cues to select mates. One such cue might be the mate choice of conspecifics. Here we report the first direct evidence that a female's preference for a particular male can in fact be reversed by social cues. In our experiments using the Trinidadian guppy (Poecilia reticulata), this reversal was mediated by mate-copying opportunities, such that a female (the 'focal' female) is given the opportunity to choose between two males, followed by a period in which she observes a second female (the 'model' female) displaying a preference for the male she herself did not prefer initially. When allowed to choose between the same males a second time, compared with control tests, a significant proportion of focal females reversed their mate choice and copied the preference of the model female. These results provide strong evidence for the role of non-genetic factors in sexual selection and underlie the need for new models of sexual selection that explicitly incorporate both genetic and cultural aspects of mate choice.  
  Address Department of Biology, Mount Allison University, Sackville, New Brunswick, Canada  
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  Series Volume Series Issue Edition  
  ISSN 0962-8452 ISBN Medium  
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  Notes (up) PMID:1360679 Approved no  
  Call Number Serial 1824  
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Author Clark, M.L.; Ayers, M. url  doi
openurl 
  Title Friendship similarity during early adolescence: gender and racial patterns Type Journal Article
  Year 1992 Publication The Journal of Psychology Abbreviated Journal J Psychol  
  Volume 126 Issue 4 Pages 393-405  
  Keywords Achievement; Adolescent; African Americans/*psychology; *Cross-Cultural Comparison; Female; *Gender Identity; Humans; Individuality; *Interpersonal Relations; Male; *Personality Development; Personality Inventory; Sociometric Techniques  
  Abstract We studied the relationship of reciprocity, gender, and racial composition (Caucasian, African American, cross-race) of adolescent friendship dyads to similarity and proximity in 136 young adolescents. We found that adolescents selected friends who were of the same gender and race and that female dyads were more similar than male dyads on verbal achievement and several personality dimensions. Caucasian dyads were more similar than African American dyads on verbal achievement, mental alertness, and dominance. African American adolescents had more contact with their best friends outside school, whereas Caucasian adolescent friends had more in-school contact. African American students had fewer reciprocal relationships than the Caucasian students. Cross-race friendships were less reciprocal than same-race friendships. Race and gender were important in determining friendship patterns. Similarity and proximity were more important than reciprocity in understanding early adolescent friendships.  
  Address Department of Psychology, Virginia Commonwealth University  
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  Series Volume Series Issue Edition  
  ISSN 0022-3980 ISBN Medium  
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  Notes (up) PMID:1403972 Approved no  
  Call Number Equine Behaviour @ team @ Serial 5628  
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Author Dvoinos, G.M.; Kharchenko, V.A.; Zviagnitsova, N.S. url  openurl
  Title The characteristics of the helminth community in the Turkmen kulan (Equus hemionus) Type Journal Article
  Year 1992 Publication Parazitologiia Abbreviated Journal Parazitologiia  
  Volume 26 Issue 3 Pages 246-251  
  Keywords Animals; Female; Helminthiasis/parasitology; Helminthiasis, Animal; Helminths/classification/*isolation & purification; Male; Perissodactyla/*parasitology; Turkmenistan; Ukraine  
  Abstract The helminth fauna of 24 kulans from Askaniya-Nova and Badkhyz was studied. 42 species of helminths were found, 34 of which belong to strongylids. The helminth species composition of kulan is similar to that of other species of horses. This is a result of an intensive parasite exchange in the historical past when numerous populations of different Equidae species made long seasonal migrations over steppe inter-river lands of Asia and grazed for some time on common pastures.  
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  Language Russian Summary Language Original Title K kharakteristike soobshchestva gel'mintov turkmenskogo kulana (Equus hemionus)  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0031-1847 ISBN Medium  
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  Notes (up) PMID:1408368 Approved no  
  Call Number Equine Behaviour @ team @ Serial 2285  
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