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| Author |
Gatta, D.; Baragli, P.; Ferrarini, N.; Ciattini, F.; Sighieri, C.; Colombani, B. |
| Title |
Fitness evaluation in endurance horses by standardised exercise test on treadmill |
Type |
Journal Article |
| Year |
1998 |
Publication |
Ippologia |
Abbreviated Journal |
Valutazione dello stato di allenamento del cavallo da endurance mediante test standardizzato su trea |
Volume  |
9 |
Issue |
4 |
Pages |
57-69 |
| Keywords |
Endurance; Horses; Treadmill |
| Abstract |
Endurance horses, like marathon runners, undertake sub-maximal, longterm physical exercises and in both cases thermoregulation plays a critical role. A standardised sub-maximal treadmill test was used to assess fitness and training state in endurance horses. Literature reports that trained human athletes dissipate head load better than not trained ones; in this study parameters related to thermoregulation were recorded together with other haematologic and metabolic ones. Six endurance horses, divided into two groups according to their training state, performed two submaximal tests at a distance of one week. Blood samples were collected at rest, during exercise, at the end and during recovery (10, 30 and 60 minutes after work). Heart rate (HR), respiratory rate (RR), rectal (RT) and skin (ST) temperatures were monitored through the exercise (and recovery for HR). HR resulted significantly lower (P<0.01) in trained horses than in untrained ones, especially during recovery. Also rectal and skin temperatures resulted significantly lower (P<0.05) in trained horses and ST increased more gradually during exercise. The values of haematocrit and haemoglobin resulted significantly lower (P<0.05) at rest, during exercise and recovery samples. In this study, the parameters related to thermoregulation, in accordance with data from human athletes, resulted significantly different in trained and untrained horses, while other parameters didn't vary significantly between the two groups. Thermoregulatory responses to exercise-generated heat load in a standardised test, studied by simple parameters, can thus offer useful information about fitness and training state of endurance horses. |
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Dipto. Anat., Biochim. Fisiol. Vet., Univ. degli Studi di Pisa |
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Cited By (since 1996): 2; Export Date: 13 November 2008; Source: Scopus |
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Equine Behaviour @ team @ |
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4655 |
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Peters, G.; Tembrock, G. |
| Title |
Subharmonics, biphonation, and deterministic chaos in mammal vocalizations |
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Journal Article |
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1998 |
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Bioacoustics |
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9 |
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Equine Behaviour @ team @ Peters1998 |
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6483 |
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| Author |
Potts, R. |
| Title |
Variability selection in hominid evolution |
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Journal Article |
| Year |
1998 |
Publication |
Evolutionary Anthropology: Issues, News, and Reviews |
Abbreviated Journal |
Evol. Anthropol. |
| Volume |
7 |
Issue |
3 |
Pages |
81-96 |
| Keywords |
variability selection; hominids; environment; adaptation; natural selection; evolution |
| Abstract |
Variability selection (abbreviated as VS) is a process considered to link adaptive change to large degrees of environment variability. Its application to hominid evolution is based, in part, on the pronounced rise in environmental remodeling that took place over the past several million years. The VS hypothesis differs from prior views of hominid evolution, which stress the consistent selective effects associated with specific habitats or directional trends (e.g., woodland, savanna expansion, cooling). According to the VS hypothesis, wide fluctuations over time created a growing disparity in adaptive conditions. Inconsistency in selection eventually caused habitat-specific adaptations to be replaced by structures and behaviors responsive to complex environmental change. Key hominid adaptations, in fact, emerged during times of heightened variability. Early bipedality, encephalized brains, and complex human sociality appear to signify a sequence of VS adaptations—i.e., a ratcheting up of versatility and responsiveness to novel environments experienced over the past 6 million years. The adaptive results of VS cannot be extrapolated from selection within a single environmental shift or relatively stable habitat. If some complex traits indeed require disparities in adaptive setting (and relative fitness) in order to evolve, the VS idea counters the prevailing view that adaptive change necessitates long-term, directional consistency in selection. © 1998 Wiley-Liss, Inc. |
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John Wiley & Sons, Inc. |
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1520-6505 |
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Equine Behaviour @ team @ |
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5461 |
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Dunbar, Robin I. M. |
| Title |
The social brain hypothesis |
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Journal Article |
| Year |
1998 |
Publication |
Evolutionary Anthropology: Issues, News, and Reviews |
Abbreviated Journal |
Evol. Anthropol. |
| Volume |
6 |
Issue |
5 |
Pages |
178-190 |
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brain size – neocortex – social brain hypothesis – social skills – mind reading – primates |
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Conventional wisdom over the past 160 years in the cognitive and neurosciences has assumed that brains evolved to process factual information about the world. Most attention has therefore been focused on such features as pattern recognition, color vision, and speech perception. By extension, it was assumed that brains evolved to deal with essentially ecological problem-solving tasks. © 1998 Wiley-Liss, Inc. |
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Robin Dunbar is Professor of Evolutionary Psychology and Behavioural Ecology at the University of Liverpool, England. His research primarily focuses on the behavioral ecology of ungulates and human and nonhuman primates, and on the cognitive mechanisms and brain components that underpin the decisions that animals make. He runs a large research group, with graduate students working on many different species on four continents. |
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Equine Behaviour @ team @ |
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4371 |
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Gilmanshin, R.; Callender, R.H.; Dyer, R.B. |
| Title |
The core of apomyoglobin E-form folds at the diffusion limit |
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Journal Article |
| Year |
1998 |
Publication |
Nature Structural Biology |
Abbreviated Journal |
Nat Struct Biol |
| Volume |
5 |
Issue |
5 |
Pages |
363-365 |
| Keywords |
Animals; Apoproteins/*chemistry; Diffusion; Horses; Myoglobin/*chemistry; *Protein Folding; Spectroscopy, Fourier Transform Infrared; Temperature |
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The E-form of apomyoglobin has been characterized using infrared and fluorescence spectroscopies, revealing a compact core with native like contacts, most probably consisting of 15-20 residues of the A, G and H helices of apomyoglobin. Fast temperature-jump, time-resolved infrared measurements reveal that the core is formed within 96 micros at 46 degrees C, close to the diffusion limit for loop formation. Remarkably, the folding pathway of the E-form is such that the formation of a limited number of native-like contacts is not rate limiting, or that the contacts form on the same time scale expected for diffusion controlled loop formation. |
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1072-8368 |
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PMID:9586997 |
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Equine Behaviour @ team @ |
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3795 |
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McLaren I.P.L. |
| Title |
Animal Learning and Cognition: A neural network approach |
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Journal Article |
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1998 |
Publication |
Trends in Cognitive Sciences |
Abbreviated Journal |
Trends. Cognit. Sci. |
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2 |
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236-236 |
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refbase @ user @ |
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3464 |
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Vallortigara G. |
| Title |
Minds of Their Own |
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Journal Article |
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1998 |
Publication |
Trends in Cognitive Sciences |
Abbreviated Journal |
Trends. Cognit. Sci. |
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2 |
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118-118 |
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3466 |
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Griffin, D.R. |
| Title |
From cognition to consciousness |
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Journal Article |
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1998 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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1 |
Issue |
1 |
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3-16 |
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Animal minds – Cognitive ethology – Cognition – Consciousness |
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This paper proposes an extension of scientific horizons in the study of animal behavior and cognition to include conscious experiences. From this perspective animals are best appreciated as actors rather than passive objects. A major adaptive function of their central nervous systems may be simple, but conscious and rational, thinking about alternative actions and choosing those the animal believes will get what it wants, or avoid what it dislikes or fears. Versatile adjustment of behavior in response to unpredictable challenges provides strongly suggestive evidence of simple but conscious thinking. And especially significant objective data about animal thoughts and feelings are already available, once communicative signals are recognized as evidence of the subjective experiences they often convey to others. The scientific investigation of human consciousness has undergone a renaissance in the 1990s, as exemplified by numerous symposia, books and two new journals. The neural correlates of cognition appear to be basically similar in all central nervous systems. Therefore other species equipped with very similar neurons, synapses, and glia may well be conscious. Simple perceptual and rational conscious thinking may be at least as important for small animals as for those with large enough brains to store extensive libraries of behavioral rules. Perhaps only in “megabrains” is most of the information processing unconscious. |
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Equine Behaviour @ team @ |
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3088 |
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Czeschlik, T. |
| Title |
Animal cognition – the phylogeny and ontogeny of cognitive abilities |
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Journal Article |
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1998 |
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Animal Cognition |
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Anim. Cogn. |
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1 |
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1 |
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1-2 |
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Equine Behaviour @ team @ |
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3100 |
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Westergaard, G.C.; Liv, C.; Chavanne, T.J.; Suomi, S.J. |
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Token-mediated tool-use by a tufted capuchin monkey (Cebus apella) |
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Journal Article |
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1998 |
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Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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1 |
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2 |
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101-106 |
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This research examined token-mediated tool-use in a tufted capuchin monkey (Cebus apella). We conducted five experiments. In experiment 1 we examined the use of plastic color-coded chips to request food, and in experiments 2-5 we examined the use of color-coded chips to request tools. Our subject learned to use chips to request tools following the same general pattern seen in great apes performing analogous tasks, that is, initial discrimination followed by an understanding of the relationship among tokens, tools, and their functions. Our findings are consistent with the view that parallel representational processes underlie the tool-related behavior of capuchins and great apes. |
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Equine Behaviour @ team @ |
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3152 |
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