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Author Ellard, M.-E.; Crowell-Davis, S.L. url  doi
openurl 
  Title (down) Evaluating equine dominance in draft mares Type Journal Article
  Year 1989 Publication Applied Animal Behaviour Science Abbreviated Journal Appl. Anim. Behav. Sci.  
  Volume 24 Issue 1 Pages 55-75  
  Keywords  
  Abstract The social hierarchy of a herd of 12 draft mares was assessed using agonism in the field, paired-feeding tests and a group-feeding test. Results from the paired-feeding test correlated significantly, but imperfectly, with those from the field. Differential motivation among subjects for the feed and disruption of ambiguous relationships among mares reduced the reliability of the paired-feeding test as a measure of social dominance. Results from the group-feeding test did not correlate significantly with the field hierarchy and only a few mares ever ate from the bucket. Height, weight and age each correlated significantly with rank; a mare's tendency to remain alone did not. Total aggressive scores during the paired-feeding test correlated with rank. However, a high-ranking mare was no more aggressive to each of her subordinates than was a low-ranking mare. Rather, all mares aggressed more against individuals close in rank to themselves and with preferred field associates. In the field, mares associated most with other mares of similar rank.  
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  Notes Approved no  
  Call Number refbase @ user @ Serial 662  
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Author Huizinga, H.A.; van der Meij, G.J.W. url  openurl
  Title (down) Estimated parameters of performance in jumping and dressage competition of the Dutch Warmblood horse Type Journal Article
  Year 1989 Publication Livestock Production Science Abbreviated Journal  
  Volume 21 Issue 4 Pages 333-345  
  Keywords  
  Abstract The objective of this study is to estimate several genetic parameters in the Dutch Warmblood riding horse population. The traits involved are performances in jumping and dressage competition. The following parameters are estimated: heritabilities for jumping and dressage; phenotypic and genetic correlations between jumping and dressage; and phenotypic and genetic correlations between performances at different ages. These parameters are estimated by restricted maximum likelihood (REML). Data are from 6899 horses with performances in jumping and 10 408 horses with performances in dressage competition. The horses are sired by 205 and 237 stallions for the two traits, respectively. The progeny range in age from 4 to 8 years old. The performance trait is a cumulatively derived score, that reflects the level of performance in competition. A square root transformation of the score is most appropriate to normalize the data. For estimation of phenotypic and genetic parameters the data is split into two data sets according to the age of the sires (offspring sired by older vs. younger stallions). For estimating correlations between performances at 4, 5 and 6 years of age, performances of the offspring out of previous years are linked to the data. The most unbiased estimates of heritability for jumping and dressage are from data derived from the youngest offspring sired by the younger stallions and are 0.20 and 0.10, respectively. Genetic correlation between jumping and dressage ranges from -0.27 to 0.10. The phenotypic correlation between these traits ranges from 0.15 to 0.26. Phenotypic and genetic correlations between performances at 4, 5 and 6 years average 0.95 and 0.75, respectively. These latter results have important implications for genetic evaluation of breeding candidates in the population.  
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  Notes Approved no  
  Call Number refbase @ user @ Serial 3966  
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Author Galef, B.G. url  doi
openurl 
  Title (down) Enduring social enhancement of rats' preferences for the palatable and the piquant Type Journal Article
  Year 1989 Publication Appetite Abbreviated Journal Appetite  
  Volume 13 Issue 2 Pages 81-92  
  Keywords  
  Abstract In three experiments on the social induction of food preferences in rats, I found: (a) that eight 30-min exposures of a naive “observer” rat to a “demonstrator” rat fed one of two approximately equipalatable diets produced observer preference for the diet fed to its demonstrator that lasted for more than a month, (b) that simple exposure of naive subjects to a diet itself, rather than to a rat that had eaten a diet, was not sufficient to enhance preference for that diet, and (c) that lasting preference for an unpalatable, piquant diet could also be established by exposing naive rats to demonstrators that had eaten the piquant diet, but not by simply exposure to the piquant diet itself. These findings are consistent with the hypothesis proposed by both Birch and Rozin that social-affective contexts are important in establishing stable, learned preferences for foods.  
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  ISSN 0195-6663 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 6567  
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Author McHugh, C.P. openurl 
  Title (down) Ecology of a semi-isolated population of adult Anopheles freeborni: abundance, trophic status, parity, survivorship, gonotrophic cycle length, and host selection Type Journal Article
  Year 1989 Publication The American Journal of Tropical Medicine and Hygiene Abbreviated Journal Am J Trop Med Hyg  
  Volume 41 Issue 2 Pages 169-176  
  Keywords Aging/physiology; Animals; Anopheles/*physiology; Breeding; California; Cattle/parasitology; Dogs/parasitology; Ecology; Feeding Behavior/physiology; Female; Horses/parasitology; Host-Parasite Relations; Male; Parity; Population Density; Rabbits/parasitology  
  Abstract A population of adult Anopheles freeborni near Sheridan, CA was sampled daily during 13 August-7 September 1984. Data on abundance, trophic status, and gonotrophic age were recorded. Abundance and gonotrophic age data were analyzed to estimate daily survivorship and gonotrophic cycle length. Daily survivorship for unfed mosquitoes was estimated to be 0.72 with a gonotrophic cycle of 6 days duration. Daily survivorship for bloodfed mosquitoes was estimated to be 0.74 with a gonotrophic cycle of 4 days. The 2 day difference in gonotrophic cycles between unfed and bloodfed mosquitoes was the result of the period required for maturation and mating of teneral females. In 1986, an incage release of field-collected females estimated survivorship at 0.75 per day. Precipitin tests of 1,338 blood-engorged mosquito abdomens indicated that bovids, horses, rabbits, and canids comprised 92% of bloodmeals; no bloodmeals of human origin were detected.  
  Address Department of Entomology, University of California, Davis  
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  Series Volume Series Issue Edition  
  ISSN 0002-9637 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:2774063 Approved no  
  Call Number Equine Behaviour @ team @ Serial 2673  
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Author de Waal, F. B. isbn  openurl
  Title (down) Dominance “style” and primate social organization. Type Book Chapter
  Year 1989 Publication Comparative Socioecology Abbreviated Journal  
  Volume Issue Pages 243-263  
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  Publisher Blackwell Science Place of Publication Editor Standen, V.; Foley, R. A.  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN 978-0632023615 Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number refbase @ user @ Serial 2864  
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Author Crowell-Davis, S.L.; Caudle, A.B. url  doi
openurl 
  Title (down) Coprophagy by foals: recognition of maternal feces Type Journal Article
  Year 1989 Publication Applied Animal Behaviour Science Abbreviated Journal Appl. Anim. Behav. Sci.  
  Volume 24 Issue 3 Pages 267-272  
  Keywords  
  Abstract Six foals were each observed for 4 h per week during the first 6 weeks of life in an experimental situation in which they had access to feces taken from their mother and from another mare which was not pregnant or lactating. The foals sniffed at the feces equally. Two foals engaged in a total of seven bouts of coprophagy. All bouts of coprophagy involved maternal feces (χ2; P<0.01).  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 2273  
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Author Steinhoff, H.J.; Lieutenant, K.; Redhardt, A. openurl 
  Title (down) Conformational transition of aquomethemoglobin: intramolecular histidine E7 binding reaction to the heme iron in the temperature range between 220 K and 295 K as seen by EPR and temperature-jump measurements Type Journal Article
  Year 1989 Publication Biochimica et Biophysica Acta Abbreviated Journal Biochim Biophys Acta  
  Volume 996 Issue 1-2 Pages 49-56  
  Keywords Animals; Electron Spin Resonance Spectroscopy; Heme; Histidine; Horses; Humans; Hydrogen-Ion Concentration; Methemoglobin/*ultrastructure; Motion; Protein Conformation; Temperature; Thermodynamics; Water  
  Abstract Temperature-dependent EPR and temperature-jump measurements have been carried out, in order to examine the high-spin to low-spin transition of aquomethemogobin (pH 6.0). Relaxation rates and equilibrium constants could be determined as a function of temperature. As a reaction mechanism for the high-spin to low-spin transition, the binding of N epsilon of His E7 to the heme iron had been proposed; the same mechanism had been suggested for the ms-effect, found in temperature-jump experiments on aquomethemoglobin. A comparison of the thermodynamic quantities, deduced form the measurements in this paper, gives evidence that indeed the same reaction is investigated in both cases. Our results and most of the findings of earlier studies on the spin-state transitions of aquomethemoglobin, using susceptibility, optical, or EPR measurements, can be explained by the transition of methemoglobin with H2O as ligand (with high-spin state at all temperatures) and methemoglobin with ligand N epsilon of His E7 (with a low-spin ground state). Thermal fluctuations of large amplitude have to be postulated for the reaction to take place, so this reaction may be understood as a probe for the study of protein dynamics.  
  Address Institut fur Biophysik, Ruhr-Universitat Bochum, F.R.G  
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  Series Volume Series Issue Edition  
  ISSN 0006-3002 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:2544230 Approved no  
  Call Number Equine Behaviour @ team @ Serial 3803  
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Author Dewsbury, D.A. url  openurl
  Title (down) Comparative Psychology, Ethology, and Animal Behavior Type Journal Article
  Year 1989 Publication Annual Review of Psychology Abbreviated Journal  
  Volume 40 Issue 1 Pages 581-602  
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  Notes Approved no  
  Call Number refbase @ user @ Serial 3541  
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Author Harrington, F.H. url  doi
openurl 
  Title (down) Chorus howling by wolves: Acoustic structures, pack size and Beau Geste effect Type Journal Article
  Year 1989 Publication Bioacoustics Abbreviated Journal  
  Volume 2 Issue Pages  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Harrington1989 Serial 6463  
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Author Hunter, L.; Houpt, K..A. url  openurl
  Title (down) Bedding material preferences of ponies. Type Journal Article
  Year 1989 Publication Journal of American Society of Animal Science Abbreviated Journal J Anim Sci  
  Volume 67 Issue 8 Pages 1986-1991  
  Keywords  
  Abstract The bedding preferences of ponies were determined using video recordings of nighttime (1900 to 0700) behavior of individually housed ponies. The ponies' behavior each minute was recorded to determine time budgets. In Exp. I, preference for bedding was determined using three mares, three stallions and two geldings given access to bedded and unbedded areas in a box stall. The ponies spent more time (66%) on the bedded area and were never observed lying on the unbedded areas. In Exp. II, three mares and six stallions were given access to a box stall, one side of which was bedded with wood shavings and the other with straw. Although some individual animals preferred one bedding over the other, neither form of bedding was preferred consistently. Time budgets in Exp. II were similar on both bedding materials. The ponies spent 12% of their nighttime lying, 2% walking, 35% eating and 50% standing inactively. Some ponies had a relatively strong preference for bedding, but the type of bedding preferred varied with the individual animal. Some individual ponies had no clear preference, but instead had a side or position preference  
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  Notes from Professor Hans Klingels Equine Reference List Approved yes  
  Call Number Serial 1211  
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