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Author Gutierrez Rincon, J.A.; Vives Turco, J.; Muro Martinez, I.; Casas Vaque, I.
Title A comparative study of the metabolic effort expended by horse riders during a jumping competition Type Journal Article
Year 1992 Publication British Journal of Sports Medicine Abbreviated Journal Br J Sports Med
Volume (up) 26 Issue 1 Pages 33-35
Keywords Adult; Animals; Energy Metabolism/*physiology; *Exertion; Heart Rate/physiology; Horses; Humans; Lactates/blood; *Sports
Abstract The three main Olympic horse riding disciplines are dressage, jumping, and three-day eventing (including dressage, cross country and jumping). In the jumping discipline (obstacle race), the 'team' (horse rider) is judged under the different conditions that might take place in a varied run. The horse is expected to show power and ability; the rider must show riding skill and good physical condition. However, the different conditions encountered by the rider during competition (duration of event, continuous isometric working level, especially in the inferior trunk, lead us to consider the need for a rider to develop different metabolic pathways to meet the high energy requirements of the competition.
Address Centre de Medicina de l'Esport de Barcelona, Spain
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Language English Summary Language Original Title
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ISSN 0306-3674 ISBN Medium
Area Expedition Conference
Notes PMID:1600451 Approved no
Call Number Equine Behaviour @ team @ Serial 3754
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Author Anderson, J.R.; Fornasieri, I.; Ludes, E.; Roeder, J.-J.
Title Social processes and innovative behaviour in changing groups of lemur fulvus Type Journal Article
Year 1992 Publication Behavioural Processes Abbreviated Journal Behav. Process.
Volume (up) 27 Issue 2 Pages 101-112
Keywords Social learning; Lemur fulvus; Dominance; Individual differences
Abstract A group of brown lemurs was presented with one or two baited food-boxes requiring a specific type of motor response in order to be opened. Subsequently, four groups containing different combinations of experienced individuals from the original group and naive individuals were tested. Solutions to the problem and access to the food were recorded and considered in relation to social factors. In the original group, two adult males learned to open the boxes, with one male increasingly preventing the other from approaching. In the second group, with the subordinate male and certain females removed, the dominant male tolerated successful performances by a juvenile female. Group 3 consisted of three passive female participants from the original group and a naive female; one of the three original females now became the sole box-opener. The introduction of the subordinate male from the original group into the all-female group led to a sharing of box-opening by this subject and the skilled female. In the final group, intense aggression toward the skilled female by a new, naive adult male resulted in two previously passive females succeeding on some occasions. In lemurs, at least some `scroungers' appear able to learn to perform a new act when the social context permits.
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Notes Approved no
Call Number refbase @ user @ Serial 576
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Author Munthali, S.M.; Banda, H.M.
Title Distribution and abundance of the common ungulates of Nyika National Park Type Journal Article
Year 1992 Publication Afr. J. Ecol Abbreviated Journal Afr. J. Ecol
Volume (up) 30 Issue Pages 203-212
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Notes Approved no
Call Number Equine Behaviour @ team @ Serial 2390
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Author Krause, J.; Bumann, D.; Todt, D.
Title Relationship between the position preference and nutritional state of individuals in schools of juvenile roach (Rutilus rutilus) Type Journal Article
Year 1992 Publication Behavioral Ecology and Sociobiology Abbreviated Journal Behav. Ecol. Sociobiol.
Volume (up) 30 Issue 3 Pages 177-180
Keywords
Abstract 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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Notes Approved no
Call Number Equine Behaviour @ team @ Serial 5140
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Author Timney, B.; Keil, K.
Title Visual acuity in the horse Type Journal Article
Year 1992 Publication Vision Research Abbreviated Journal Vis. Res.
Volume (up) 32 Issue 12 Pages 2289-2293
Keywords Horse Visual acuity Visual discrimination
Abstract We assessed the ease with which horses could learn visual discriminations and measured their resolution acuity. We trained three horses to press their noses against one of two large wooden panels to receive a small food reward. Following training on a series of two-choice discrimination tasks, resolution acuity was measured. Although there was some variability between animals, the best acuity obtained was 23.3 c deg-1. Within the margin of error imposed by limited anatomical data, the obtained values are consistent with predictions based on retinal ganglion cell density estimates and posterior nodal distance/axial length ratios. They suggest that the resolution acuity of the horse is limited by ganglion cell density in the temporal portion of the narrow visual streak.
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Notes Approved no
Call Number refbase @ user @ Serial 851
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Author Keiper, R.; Receveur, H.
Title Social interactions of free-ranging Przewalski horses in semi-reserves in the Netherlands Type Journal Article
Year 1992 Publication Applied Animal Behaviour Science Abbreviated Journal Appl. Anim. Behav. Sci.
Volume (up) 33 Issue 4 Pages 303-318
Keywords
Abstract Social interactions were recorded in two bands of free-ranging Przewalski horses living on large (greater than 30 ha) pastures in the Netherlands. The average number of aggressive interactions per hour was 8.86 at Lelystad and 10.36 at Noorderheide. The most common aggressive interactions were lower intensity, lower cost displacements (17.2% of all aggressive acts at Lelystad, 13.2% at Noorderheide), threats to bite (42.3% and 40.7%, respectively) and threats to kick (15.4% and 23.9%, respectively). Analysis of aggression revealed that a clear, linear dominance hierarchy was present in each band. For each band there was a positive and highly significant correlation between the age of a horse and its rank in the hierarchy. In each band, the stallion was not the highest ranked horse. Non-agonistic behaviors exceeded the number of agonistic interactions (1253 vs. 558 for Lelystad; 1257 vs. 995 at Noorderheide). There was a negative correlation between the rank of a horse in the dominance hierarchy and the number of non-agonistic behaviors displayed. The group displaying the highest number of non-agonistic interactions were foals (48.9% of total non-agonistic behaviors at Lelystad; 51.1% at Noorderheide). The non-agonistic/agonistic ratio was greater than 1 for yearlings and the band stallion, as was also the case for foals, but was less than 1 for males.
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Notes Approved no
Call Number refbase @ user @ Serial 778
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Author Smith-Funk, E.D.; Crowell-Davis, S.L.
Title Maternal behavior of draft mares (Equus caballus) with mule foals (Equus asinus x Equus caballus) Type Journal Article
Year 1992 Publication Applied Animal Behaviour Science Abbreviated Journal Appl. Anim. Behav. Sci.
Volume (up) 33 Issue 2-3 Pages 93-119
Keywords
Abstract Draft mares and their mule foals were observed from the day of birth to Week 17 of each foal's life. The rate of nursing was recorded and the duration of nursing activity to the nearest second. The rate at which foals engaged in nursing activity varied at each age. The duration of nursing bouts varied slightly as the foals matured. Aggression was recorded during both nursing and non-nursing activity for both the mares and foals. Maternal aggression was highest during nursing activity, especially during the pre-nurse nuzzling period. Maternal aggression increased as the foals matured. Mother-directed foal aggression was primarily in response to maternal aggression. Spatial relationships between each focal dyad were recorded when the foals were upright, not nursing and when they were recumbent. Spatial relationships differed based on the foal's state. The activity in which the mare engaged while her foal was recumbent was recorded. The movements of the mares were also recorded during foal recumbency. Mares approached or maintained their distance from their recumbent foal more than they left their recumbent foal in all weeks of the study, except Week 2.
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Notes Approved no
Call Number Equine Behaviour @ team @ Serial 2272
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Author Kabuga, J.D.
Title Social relationships in N'dama cattle during supplementary feeding Type Journal Article
Year 1992 Publication Applied Animal Behaviour Science Abbreviated Journal Appl. Anim. Behav. Sci.
Volume (up) 34 Issue 4 Pages 285-290
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Abstract Social relationships of 30 N'dama cows during supplementary feeding, post-grazing, were studied over a period of 1.5 years. Dominance ranks determined during idling and feeding periods were strongly correlated (Spearman's rank correlation (rs = 0.964, P < 0.01). The number of animals dominated by a cow during feeding was strongly (P < 0.01) related to liveweight (r = 0.822) and age (r = 0.755). Low status cows ate less frequently than medium and high status animals, while middle ranking cows were ejected more frequently from the feed trough than other dominance groups. Animals had preferences in the use of feed troughs, with social rank being the dominant factor determining the location of feed trough space used. Cows of similar status were generally preferred feeding and movement neighbours and antagonists. However, the dominance rank of an animal and its preferred neighbour during idling were not significantly correlated (rs = 0.220, P > 0.05). Voluntary leadership ranks into and out of the pen were, respectively, related closely (P < 0.01) to feeding dominance ranks (rs = 0.661, 0.640) and idling dominance ranks (rs = 0.621, 0.669).
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Notes Approved no
Call Number Equine Behaviour @ team @ room B 3.029 Serial 2033
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Author Dugatkin, L.A.; Godin, G.J.
Title Predator inspection, shoaling and foraging under predation hazard in the Trinidadian guppy,Poecilia reticulata Type Journal Article
Year 1992 Publication Environmental Biology of Fishes Abbreviated Journal
Volume (up) 34 Issue 3 Pages 265-276
Keywords Antipredation – Social group – Feeding – Predation risk – Trade-off – Fish
Abstract Guppies,Poecilia reticulata, living in stream pools in Trinidad, West Indies, approached a potential fish predator (a cichlid fish model) in a tentative, saltatory manner, mainly as singletons or in pairs. Such behavior is referred to as predator inspection behavior. Inspectors approached the trunk and tail of the predator model more frequently, more closely and in larger groups than they approached the predator's head, which is presumably the most dangerous area around the predator. However, guppies were not observed in significantly larger shoals in the stream when the predator model was present. In a stream enclosure, guppies inspected the predator model more frequently when it was stationary compared to when it was moving, and made closer inspections to the posterior regions of the predator than to its head. Therefore, the guppies apparently regarded the predator model as a potential threat and modified their behavior accordingly when inspecting it. Guppies exhibited a lower feeding rate in the presence of the predator, suggesting a trade-off between foraging gains and safety against predation. Our results further suggest that predator inspection behavior may account for some of this reduction in foraging. These findings are discussed in the context of the benefits and costs of predator inspection behavior.
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Call Number Equine Behaviour @ team @ Serial 2176
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Author Eisgruber, H.; Stolle, F.A.
Title [Clostridia in carcasses and fresh meat--a literature review] Type Journal Article
Year 1992 Publication Zentralblatt fur Veterinarmedizin. Reihe B. Journal of Veterinary Medicine. Series B Abbreviated Journal Zentralbl Veterinarmed B
Volume (up) 39 Issue 10 Pages 746-754
Keywords Abattoirs; Animals; Cattle; Clostridium/*growth & development; *Food Microbiology; Horses; Meat/*microbiology; Muscles/*microbiology; Sheep; Swine
Abstract Clostridia are of large clinical importance as well as in the field of food hygiene, where they are responsible for spoilage but they also have a certain significance as food poisoning organisms. Information on the ecology of Clostridia in samples of deep muscle tissue of slaughtered animals is insufficient. This article is intended to increase the knowledge on the occurrence of different Clostridia species in slaughtered animals. The main emphasis is put on the significance of clostridia in meat hygiene. The theoretical basis of the so called original content of microorganisms (intrinsic bacteria), the factors and pathways of Clostridia spreading in muscles and organs are demonstrated.
Address Institut fur Hygiene und Technologie, Ludwig-Maximilians-Universitat Munchen
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Language German Summary Language Original Title Clostridien in Schlachttierkorpern und frischem Fleisch--Eine Literaturubersicht
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ISSN 0514-7166 ISBN Medium
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Notes PMID:1492516 Approved no
Call Number Equine Behaviour @ team @ Serial 2668
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