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Author Mitchell, B.L.; Skenton, J.B.; Uys, J.C.M. openurl 
  Title Predation on large mammals in Kafue National Park Type Journal Article
  Year (up) 1965 Publication Abbreviated Journal Zool. Afr  
  Volume 1 Issue Pages 297-318  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 2377  
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Author Heck L Jr, openurl 
  Title Immobilisation einer Hartmann-Berzebrastute mit Hilfe der Cap Chur Gun im Tierpark Hellabrunn, München Type Journal Article
  Year (up) 1966 Publication Zoologische Garten Abbreviated Journal Zool. Garten.  
  Volume 32 Issue Pages 159-162  
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  Notes from Professor Hans Klingels Equine Reference List Approved no  
  Call Number Serial 1173  
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Author Klingel H Klingel U, openurl 
  Title Die Geburt eines Zebras (Equus quagga boehmi Matschie) Type Journal Article
  Year (up) 1966 Publication Zeitschrift für Tierpsychologie Abbreviated Journal Z. Tierpsychol.  
  Volume 23 Issue Pages 72-76  
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  Notes from Professor Hans Klingels Equine Reference List Approved no  
  Call Number Serial 1281  
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Author Zolovick, A.; Upson, D.W.; Eleftheriou, B.E. url  openurl
  Title Diurnal Variation In Plasma Glucocorticosteroid Levels In The Horse (Equus Caballus) Type Journal Article
  Year (up) 1966 Publication Journal of Endocrinology Abbreviated Journal J. Endocrinol.  
  Volume 35 Issue 3 Pages 249-253  
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  Abstract Thin-layer chromatography, acetylation of reference and unidentified glucocorticosteroids, u.v. absorption and fluorescence induced in sulphuric acid were used to identify cortisol as the major free plasma glucocorticosteroid in the horse (Equus caballus), with cortisone and corticosterone as minor glucocorticosteroids. Deoxycorticosterone was also identified. The plasma ratio for free cortisol: cortisone: corticosterone was 16:8:0·5.The diurnal variation was determined for all three glucocorticosteroids. The highest levels of cortisol and corticosterone were found at 10.00 hr. (260 and 10·3 μg./100 ml., respectively) and the lowest concentration of cortisol at 02.00 hr. The highest level of cortisone occurred at 02.00 hr. (140 μg./100 ml.), and the lowest appeared at 16.00 hr. (65 μg./100 ml.). The maximum plasma concentration of the combined glucocorticosteroids was found at 10.00 hr. (395·3 μg./100 ml.), and the minimum at 20.00 hr. (219 μg./100 ml.).  
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  Notes 10.1677/joe.0.0350249 Approved no  
  Call Number Equine Behaviour @ team @ Serial 5591  
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Author Klingel, H. url  doi
openurl 
  Title Soziale Organisation und Verhalten freilebender Steppenzebras (Equus quagga) Type Journal Article
  Year (up) 1967 Publication Zeitschrift für Tierpsychologie Abbreviated Journal Z. Tierpsychol.  
  Volume 24 Issue 5 Pages 580-624  
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  Notes from Professor Hans Klingels Equine Reference List Approved yes  
  Call Number Serial 1289  
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Author Klingel, H. doi  openurl
  Title Sozial Organisation und Verhaltensweisen von Hartmann- und Bergzebras (Equus zebra hartmannae und E. z. zebra). Type Journal Article
  Year (up) 1968 Publication Zeitschrift für Tierpsychologie Abbreviated Journal Z. Tierpsychol.  
  Volume 25 Issue Pages 76-88  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 2163  
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Author Klingel H, openurl 
  Title Dauerhafte Sozialverbände beim Bergzebra Type Journal Article
  Year (up) 1969 Publication Zeitschrift für Tierpsychologie Abbreviated Journal Z. Tierpsychol.  
  Volume 26 Issue Pages 965-966  
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  Notes from Professor Hans Klingels Equine Reference List Approved no  
  Call Number Serial 1295  
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Author Roth Hh, openurl 
  Title Über das Schwimmen afrikanischer Landsäugetiere im Kariba – Stauseegebiet und ihr Verhalten gegenüber dem Flutwasser Type Journal Article
  Year (up) 1969 Publication Zoologische Garten Abbreviated Journal Zool. Garten.  
  Volume 37 Issue Pages 12-29  
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  Notes from Professor Hans Klingels Equine Reference List Approved no  
  Call Number Serial 1522  
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Author Sambraus, H.H. url  doi
openurl 
  Title Das soziale Lecken des Rindes Type Journal Article
  Year (up) 1969 Publication Zeitschrift für Tierpsychologie Abbreviated Journal Z. Tierpsychol.  
  Volume 26 Issue 7 Pages 805-810  
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  Publisher Blackwell Publishing Ltd Place of Publication Editor  
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  ISSN 1439-0310 ISBN Medium  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 5235  
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Author Hamilton, W.D. doi  openurl
  Title Geometry for the selfish herd Type Journal Article
  Year (up) 1971 Publication Journal of theoretical biology Abbreviated Journal J. Theor. Biol.  
  Volume 31 Issue 2 Pages 295-311  
  Keywords Animals; Anura; *Behavior, Animal; Breeding; Communication; Evolution; Fear; Metallurgy; *Models, Biological; Probability; Snakes; *Spatial Behavior  
  Abstract This paper presents an antithesis to the view that gregarious behaviour is evolved through benefits to the population or species. Following Galton (1871) and Williams (1964) gregarious behaviour is considered as a form of cover-seeking in which each animal tries to reduce its chance of being caught by a predator.

It is easy to see how pruning of marginal individuals can maintain centripetal instincts in already gregarious species; some evidence that marginal pruning actually occurs is summarized. Besides this, simply defined models are used to show that even in non-gregarious species selection is likely to favour individuals who stay close to others.

Although not universal or unipotent, cover-seeking is a widespread and important element in animal aggregation, as the literature shows. Neglect of the idea has probably followed from a general disbelief that evolution can be dysgenic for a species. Nevertheless, selection theory provides no support for such disbelief in the case of species with outbreeding or unsubdivided populations.

The model for two dimensions involves a complex problem in geometrical probability which has relevance also in metallurgy and communication science. Some empirical data on this, gathered from random number plots, is presented as of possible heuristic value.
 
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  ISSN 0022-5193 ISBN Medium  
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  Notes PMID:5104951 Approved no  
  Call Number refbase @ user @ Serial 771  
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