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Author |
Schneider M,; Schneider R, |
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Title |
ZUr Kenntnis der innerartlichen Ausformung des Schmelzmusters bei Equidenzähnen |
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1966 |
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Zool Anz |
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176 |
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71-97 |
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from Professor Hans Klingels Equine Reference List |
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1575 |
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Author |
Mazak V, |
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Title |
Spring moult in Equus hemionus kiang Moorcroft 1841 and a contribution to the phylegensis of moulting in the subfamily Equinae (Perissodactyla, Mammalia) |
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1961 |
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Zool Anz |
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168 |
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164-169 |
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from Professor Hans Klingels Equine Reference List |
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no |
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1372 |
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Author |
ANSELL, WFH |
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Title |
The breeding of some larger mammals in northern Rhodesia |
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1960 |
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Proceedings of the Zoological Society of London |
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Proc. Zool. Soc. London. |
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134 |
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Details are given of a standard manner of recording breeding data of large mammals by game department officers, which is considered a great improvement on previous casual reporting. Information on the breeding in Northern Rhodesia of several ungulates and large Carnivora is summarised, and comparisons made with published data from other territories. It is stressed that much more study is needed, but certain points emerge from consideration of present information. Many species have their young at any time of year, and only a few have a really sharply defined birth season. The wart hog (Phacochoerus aethiopicus) seems markedly seasonal in the south of its range, but not in the northern parts. There is at present no data on the fluctuations in frequency of births among non-seasonal breeders. In the seasonally breeding species the actual birth months vary somewhat from north to south, and in the wildebeest (Connochaetes taurinus) there may be variation in the calving time due apparently to purely localdifferences of environment. The wild dog (Lycaon pictus) appears to be monoestrus, but data on the larger felids, though incomplete, seems to indicate that young may be born at any time of the year. Limiting factors in the study of breeding in African large mammals are pointed out, but it is suggested that further work on the lines of that carried out in Northern. Rhodesia would be profitable. |
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from Prof. Hans Klingels Equine Reference List |
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refbase @ user @ |
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643 |
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ANTONIUS. O. |
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On the geographical distribution, in former times and to-day, of the recent equidae. |
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1938 |
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Proceedings of the Zoological Society of London |
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Proc. Zool. Soc. London. |
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107 |
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4 |
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557-564 |
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from Prof. Hans Klingels Equine Reference List |
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no |
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885 |
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Author |
Healy, S.D.; Jones, C.M. |
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Title |
Animal learning and memory: an integration of cognition and ecology |
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2002 |
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Zoology |
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Zoology |
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105 |
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4 |
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321-327 |
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cognitive ecology; spatial learning and memory; adaptive specialisation |
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Summary A wonderfully lucid framework for the ways to understand animal behaviour is that represented by the four [`]whys' proposed by Tinbergen (1963). For much of the past three decades, however, these four avenues have been pursued more or less in parallel. Functional questions, for example, have been addressed by behavioural ecologists, mechanistic questions by psychologists and ethologists, ontogenetic questions by developmental biologists and neuroscientists and phylogenetic questions by evolutionary biologists. More recently, the value of integration between these differing views has become apparent. In this brief review, we concentrate especially on current attempts to integrate mechanistic and functional approaches. Most of our understanding of learning and memory in animals comes from the psychological literature, which tends to use only rats or pigeons, and more occasionally primates, as subjects. The underlying psychological assumption is of general processes that are similar across species and contexts rather than a range of specific abilities. However, this does not seem to be entirely true as several learned behaviours have been described that are specific to particular species or contexts. The first conspicuous exception to the generalist assumption was the demonstration of long delay taste aversion learning in rats (Garcia et al., 1955), in which it was shown that a stimulus need not be temporally contiguous with a response for the animal to make an association between food and illness. Subsequently, a number of other examples, such as imprinting and song learning in birds (e.g., Bolhuis and Honey, 1998; Catchpole and Slater, 1995; Horn, 1998), have been thoroughly researched. Even in these cases, however, it has been typical for only a few species to be studied (domestic chicks provide the [`]model' imprinting species and canaries and zebra finches the song learning [`]models'). As a result, a great deal is understood about the neural underpinnings and development of the behaviour, but substantially less is understood about interspecific variation and whether variation in behaviour is correlated with variation in neural processing (see review by Tramontin and Brenowitz, 2000 but see ten Cate and Vos, 1999). |
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0944-2006 |
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Equine Behaviour @ team @ |
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4741 |
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Author |
Geisbauer, G.; Griebel, U.; Schmid, A.; Timney, B |
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Title |
Brightness discrimination and neutral point |
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Journal Article |
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Year |
2004 |
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Canadian Journal of Zoology |
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Can. J. Zool |
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82 |
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4 |
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660-670 |
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Abstract: Equine brightness discrimination ability and color discrimination were measured using a two-choice discrimination
task. Two Haflinger horses (Equus caballus L., 1758) were trained to discriminate 30 different shades of grey
varying from low to high relative brightness. Their ability to distinguish shades of grey was poor, with calculated
Weber fractions of 0.42 and 0.45. In addition, a “neutral point” test to determine the dimensionality of color vision
was carried out. Three hues of blue-green were tested versus a range of grey targets with brightnesses similar to those
of the blue-green targets. A neutral point was found at about 480 nm. Thus, we can conclude that horses possess
dichromatic color vision. |
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Equine Behaviour @ team @ |
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3649 |
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Author |
Buttiker, W. |
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[Preliminary report on eye-frequenting butterflies in the Ivory Coast] |
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Journal Article |
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Year |
1973 |
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Revue Suisse de Zoologie; Annales de la Societe Zoologique Suisse et du Museum d'Histoire Naturelle de Geneve |
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Rev Suisse Zool |
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80 |
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1 |
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1-43 |
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Animals; Behavior, Animal; Cattle; Cote d'Ivoire; Ecology; Ectoparasitic Infestations/*veterinary; *Eye; Horses; *Insects; *Parasites; Sheep |
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German |
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Vorlaufige Beobachtungen an augenbesuchenden Schmetterlingen in der Elfenbeinkuste |
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0035-418X |
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PMID:4354354 |
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Equine Behaviour @ team @ |
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2716 |
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Author |
Klingel H, |
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Title |
Die Evolution der Sozialen Organisation der Equiden |
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1986 |
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Verh Dtsch Zool Ges |
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79 |
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176 |
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from Professor Hans Klingels Equine Reference List |
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no |
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1318 |
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Zharkikh, T.L.; Andersen, L. |
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Title |
Behaviour of Bachelor Males of the Przewalski Horse (Equus ferus przewalskii) at the Reserve Askania Nova |
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2009 |
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Der Zoologische Garten |
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Zoologische Garten |
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78 |
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5-6 |
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282-299 |
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Equid; Przewalski horse (Equus ferus przewalskii); Bachelor group; Social behaviour |
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The aim of this study was to investigate social relationships between Przewalski horses at a high density in a bachelor group housed in a 3.5-ha enclosure. The group consisted of 16 males aged 5 to 16. Behavioural data were collected during 18 days, total 216 h. Fifteen minute focal animal sampling was used; each horse was observed three times a day for a total of 45 min. The occurrence of 25 behaviours was recorded, and group spacing behaviour was studied using nearest neighbour recordings. The group divided into four subgroups; this supports earlier findings of bachelor groups (n>=10) dividing into two or more subgroups if they included several males aged >5 years. The total frequency of social interactions was 14.6±1.1 h-1. Although the density of the group in this study was higher than in other zoos, the males interacted agonistically only 3.6 h-1. The most frequently observed social behaviour categories were friendly interactions. This study shows possibilities to use some investigative behaviours (marking, flehmen, olfactory investigation, etc.) as indicators of social status of animals in a group. |
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0044-5169 |
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Equine Behaviour @ team @ |
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5098 |
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Author |
Weckerly, Floyd W. |
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Title |
Social bonding and aggression in female Roosevelt elk |
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Journal Article |
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1999 |
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Canadian Journal of Zoology |
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Can J Zool |
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77 |
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9 |
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1379-1384 |
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Abstract: The relationship between degree of social bonding (extent of association among individuals) and level of aggression in ruminants is unclear. I examined social bonding and aggression in three groups of female Roosevelt elk (Cervus elaphus roosevelti) over 2 years. I hypothesized that when animals are socially bonded, bouts of aggression will be won by the individual initiating the aggression, occur quickly, and involve little physical contact, and the level of aggression does not correlate with group size. The degree of social bonding was high among individuals in all groups. Dyads of known individuals were together >80% of the time. A permutation analysis indicated that groups with the observed sizes had <0.001 chance of random association, except on one occasion when the probability was 0.72 for one group. Using focal-animal sampling, aggressive interactions were won 72% of the time by the initiator, occurred quickly (<5 s), and involved little physical contact, and the level of aggression was not correlated with group size. The level of aggression was, however, significantly lower in one of the groups. This group may have had access to more abundant food resources than the other groups. Socially bonded elk conducted aggressive interactions in a fashion that did not disrupt social stability. Résumé : La relation entre le degré de liaison sociale (importance des associations entre individus) et l`agressivité n`est pas claire chez les ruminants. J`ai étudié les liaisons sociales et l`agressivité chez trois groupes de femelles du Cerf de Roosevelt (Cervus elaphus roosevelti) pendant 2 ans. J`ai posé en hypothèse que, chez les animaux liés socialement, la victoire devrait être emportée par l`individu qui entreprend l`agression, l`agression devrait être de courte durée, se faire avec peu de contacts physiques et la fréquence des agressions ne devrait pas être liée à la taille du groupe. Des paires d`individus passaient plus de 80% de leur temps ensemble. Une analyse des permutations a démontré que, chez les groupes des tailles observées, la probabilité d`une association aléatoire était de moins de 0,001, sauf en un cas où cette probabilité a été évaluée à 0,72 chez un groupe. Par échantillonnage directionnel, j`ai observé que les interactions agressives étaient gagnées par l`individu attaquant 72% du temps, étaient de courte durée (<5 s), se faisaient avec peu de contacts physiques et leur fréquence n`était pas reliée à la taille du groupe. Il y avait cependant moins d`agressivité chez l`un des groupes. Il se peut que ce groupe ait eu accès à plus de ressources alimentaires que les autres. Chez les cerfs liés par des liens sociaux, l`agressivité ne se manifeste pas de façon à déséquilibrer la stabilité sociale. |
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Equine Behaviour @ team @ |
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