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| Author | Lutta, A.S. | ||||
| Title | [Distribution and biology of Heptatoma pellucens in the Karelian ASSR (fam. Tabanidae)] | Type | Journal Article | ||
| Year | 1976 | Publication | Parazitologiia | Abbreviated Journal | Parazitologiia |
| Volume | 10 | Issue | 1 | Pages | 53-55 |
| Keywords | Animals; Biology; *Diptera; Ecology; Female; Horses/parasitology; Larva; Russia | ||||
Abstract  |
The analysis is given of the peculiarities of the distribution of the widely spread forest subspecies Heptatoma pellucens pellucens Fabr. in the northern part of its distribution area in Karelia. Some data on the biology of the larva of this subspecies are presented. | ||||
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| Language | Russian | Summary Language | Original Title | K rasprostraneniiu i biologii Heptatoma pellucens v Karel'skoi ASSR (sem. Tabanidae) | |
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0031-1847 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:133320 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 2701 | ||
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| Author | Hoang, L.; Maity, H.; Krishna, M.M.G.; Lin, Y.; Englander, S.W. | ||||
| Title | Folding units govern the cytochrome c alkaline transition | Type | Journal Article | ||
| Year | 2003 | Publication | Journal of Molecular Biology | Abbreviated Journal | J Mol Biol |
| Volume | 331 | Issue | 1 | Pages | 37-43 |
| Keywords | Animals; Cytochrome c Group/*chemistry; Horses; Hydrogen/chemistry; Hydrogen-Ion Concentration; Kinetics; Models, Molecular; *Protein Folding; Protein Structure, Tertiary; Spectrum Analysis; Titrimetry | ||||
| Abstract |
The alkaline transition of cytochrome c is a model for protein structural switching in which the normal heme ligand is replaced by another group. Stopped flow data following a jump to high pH detect two slow kinetic phases, suggesting two rate-limiting structure changes. Results described here indicate that these events are controlled by the same structural unfolding reactions that account for the first two steps in the reversible unfolding pathway of cytochrome c. These and other results show that the cooperative folding-unfolding behavior of protein foldons can account for a variety of functional activities in addition to determining folding pathways. | ||||
| Address | Department of Biochemistry and Biophysics, University of Pennsylvania School of Medicine, Philadelphia, PA 19104-6059, USA. lhoang@mail.upenn.edu | ||||
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| Language | English | Summary Language | Original Title | ||
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| ISSN | 0022-2836 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:12875834 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 3781 | ||
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| Author | Marlin, D.J.; Schroter, R.C.; White, S.L.; Maykuth, P.; Matthesen, G.; Mills, P.C.; Waran, N.; Harris, P. | ||||
| Title | Recovery from transport and acclimatisation of competition horses in a hot humid environment | Type | Journal Article | ||
| Year | 2001 | Publication | Equine Veterinary Journal | Abbreviated Journal | Equine Vet J |
| Volume | 33 | Issue | 4 | Pages | 371-379 |
| Keywords | Acclimatization/*physiology; Animals; Body Temperature; Body Weight; Breeding; Feeding Behavior; Female; Heart Rate; Heat; Heat Stroke/prevention & control/veterinary; Horse Diseases/prevention & control; Horses/*physiology; Humidity; Male; Respiration; Sports; *Transportation; Tropical Climate | ||||
| Abstract |
The aims of the present field-based study were to investigate changes in fit horses undergoing acclimatisation to a hot humid environment and to provide data on which to base recommendations for safe transport and acclimatisation. Six horses (age 7-12 years) were flown from Europe to Atlanta and underwent a 16 day period of acclimatisation. Exercise conditions during acclimatisation (wet bulb globe temperature index 27.6+/-0.0 [mean +/- s.e.]) were more thermally stressful compared with the European climate from which the horses had come (22.0+/-1.8, P<0.001). Following the flight, weight loss was 4.1+/-0.8% bodyweight and took around 7 days to recover. Water intake during the day was significantly increased (P<0.05) compared with night during acclimatisation. Daily mean exercise duration was 72+/-12 min and the majority of work was performed with a heart rate below 120 beats/min. Respiratory rate (fR) was increased (P<0.05) throughout acclimatisation compared with in Europe, but resting morning (AM) and evening (PM) rectal temperature (TREC), heart rate (fC) and plasma volume were unchanged. White blood cell (WBC) count was significantly increased at AM compared with in Europe on Days 4 and 10 of acclimatisation (P<0.01), but was not different by Day 16. In conclusion, horses exposed to hot humid environmental conditions without prior acclimatisation are able to accommodate these stresses and, with appropriate management, remain fit and clinically healthy, without significant risk of heat illness or heat-related disorders, provided they are allowed sufficient time to recover from transport, acclimatisation is undertaken gradually and they are monitored appropriately. | ||||
| Address | Centre for Equine Studies, Animal Health Trust, Newmarket, Suffolk, UK | ||||
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| Language | English | Summary Language | Original Title | ||
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| ISSN | 0425-1644 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:11469770 | Approved | no | ||
| Call Number | refbase @ user @ | Serial | 1917 | ||
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| Author | Hausberger, M.; Bruderer, C.; Le Scolan, N.; Pierre, J.-S. | ||||
| Title | Interplay between environmental and genetic factors in temperament/personality traits in horses (Equus caballus) | Type | Journal Article | ||
| Year | 2004 | Publication | Journal of Comparative Psychology | Abbreviated Journal | J Comp Psychol |
| Volume | 118 | Issue | 4 | Pages | 434-446 |
| Keywords | *Affect; Animals; Behavior, Animal/*physiology; *Environment; Female; Horses/*psychology; Learning; Male; Memory/physiology | ||||
| Abstract |
The aim of the present study was to broach the question of the relative influence of different genetic and environmental factors on different temperament/personality traits of horses (Equus caballus). The researchers submitted 702 horses to standardized experimental tests and investigated 9 factors, either genetic or environmental. Genetic factors, such as sire or breed, seemed to influence more neophobic reactions, whereas environmental factors, such as the type of work, seemed to play a more dominant role in reactions to social separation or learning abilities. Additive effects were evident, showing how environmental factors may modulate behavioral traits. This study constitutes a first step toward understanding the relative weights of genetic factors and how the environment may intervene in determining individual behavioral characteristics. | ||||
| Address | Ethologie-Evolution-Ecologie, Universite de Rennes 1, Rennes, France. Martine.Hausberger@univ-rennes1.fr | ||||
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| Publisher | Place of Publication | Washington, D.C. : 1983 | Editor | ||
| Language | English | Summary Language | Original Title | ||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0735-7036 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:15584780 | Approved | no | ||
| Call Number | Serial | 1897 | |||
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| Author | Takimoto, A.; Fujita, K. | ||||
| Title | Are horses (Equus caballus) sensitive to human attentional states? | Type | Conference Article | ||
| Year | 2008 | Publication | IESM 2008 | Abbreviated Journal | |
| Volume | Issue | Pages | |||
| Keywords | Horses; Attentional state; Begging behavior | ||||
| Abstract |
The ability to reliably detect what others are attending to seems important for social species to interact with their partners. Domestic horses (Equus caballus) have lived with humans for over five thousand years, hence they might have developed sensitivity to human attention. In the present study, we investigated whether horses would discriminate the situation in which a human experimenter could see them from the situation in which she could not. Specifically, we tested whether horses understand the role of eyes in human attentional states, produce more visual gestures when the experimenter can see their begging behaviors and produce more auditory or tactile gestures when she can not. We used with a slight modification the paradigm that previously yielded support for chimpanzee understanding of human attention (Hostetter et al. 2007). Twelve horses were offered food by the experimenter who showed various attentional states in front of them. We scored frequency of begging behaviors by the horses. In experiment 1, we set three kinds of condition: hand over the eyes, hand over the mouth and away. In the last condition there was only a food in front of horses, which was a control condition. The results showed that horses produced more auditory or tactile begging behaviors when the experimenter“s eyes were not visible than when her eyes were visible, but there was no difference in visual begging behaviors. In experiment 2, we set two kinds of condition: eyes closed and eyes open. The horses also produced more auditory or tactile begging behaviors when the experimenter”s eyes were closed than when they were open. However, there was no difference in visual begging behaviors. These results show that horses discriminate the situation in which humans can see from that in which humans can not. Of special interest, horses increased only auditory or tactile behaviors, not all types of communicative behaviors, when the experimenter could not see their begging behaviors. This result suggests that horses are sensitive to human attentional states. Moreover, horses may do recognize the eyes as an important indicator of whether or not humans will respond to their behavior and they may be able to behave flexibly depending upon human attentional states | ||||
| Address | Kyoto University | ||||
| Corporate Author | Takimoto, A. | Thesis | |||
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| Area | Expedition | Conference | IESM 2008 | ||
| Notes | Poster IESM 2008 | Approved | yes | ||
| Call Number | Equine Behaviour @ team @ | Serial | 4481 | ||
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| Author | Dutto, D.J.; Hoyt, D.F.; Clayton, H.M.; Cogger, E.A.; Wickler, S.J. | ||||
| Title | Moments and power generated by the horse (Equus caballus) hind limb during jumping | Type | Journal Article | ||
| Year | 2004 | Publication | The Journal of Experimental Biology | Abbreviated Journal | J Exp Biol |
| Volume | 207 | Issue | Pt 4 | Pages | 667-674 |
| Keywords | Animals; Biomechanics; Hindlimb/*physiology; Horses/*physiology; Locomotion/*physiology | ||||
| Abstract |
The ability to jump over an obstacle depends upon the generation of work across the joints of the propelling limb(s). The total work generated by one hind limb of a horse and the contribution to the total work by four joints of the hind limb were determined for a jump. It was hypothesized that the hip and ankle joints would have extensor moments performing positive work, while the knee would have a flexor moment and perform negative work during the jump. Ground reaction forces and sagittal plane kinematics were simultaneously recorded during each jumping trial. Joint moment, power and work were determined for the metatarsophalangeal (MP), tarsal (ankle), tibiofemoral (knee) and coxofemoral (hip) joints. The hip, knee and ankle all flexed and then extended and the MP extended and then flexed during ground contact. Consistent with our hypothesis, large extensor moments were observed at the hip and ankle joints and large flexor moments at the knee and MP joints throughout ground contact of the hind limb. Peak moments tended to occur earlier in stance in the proximal joints but peak power generation of the hind limb joints occurred at similar times except for the MP joint, with the hip and ankle peaking first followed by the MP joint. During the first portion of ground contact (approximately 40%), the net result of the joint powers was the absorption of power. During the remainder of the contact period, the hind limb generated power. This pattern of power absorption followed by power generation paralleled the power profiles of the hip, ankle and MP joints. The total work performed by one hind limb was 0.71 J kg(-1). Surprisingly, the knee produced 85% of the work (0.60 J kg(-1)) done by the hind limb, and the positive work performed by the knee occurred during the first 40% of the take-off. There is little net work generated by the other three joints over the entire take-off. Velocity of the tuber coxae (a landmark on the pelvis of the animal) was negative (downward) during the first 40% of stance, which perhaps reflects the negative work performed to decrease the potential energy during the first 40% of contact. During the final 60% of contact, the hip, ankle and MP joints generate positive work, which is reflected in the increase of the animal's potential energy. | ||||
| Address | Department of Kinesiology and Health Promotion, California State Polytechnic University, Pomona, CA 91768, USA. ddutto@csupomona.edu | ||||
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| Language | English | Summary Language | Original Title | ||
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| ISSN | 0022-0949 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:14718509 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 3654 | ||
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| Author | Houpt, K.A.; Zahorik, D.M.; Swartzman-Andert, J.A. | ||||
| Title | Taste aversion learning in horses | Type | Journal Article | ||
| Year | 1990 | Publication | Journal of animal science | Abbreviated Journal | J. Anim Sci. |
| Volume | 68 | Issue | 8 | Pages | 2340-2344 |
| Keywords | Animal Feed; Animals; *Avoidance Learning; Feeding Behavior/*psychology; *Food Preferences; Horses/physiology/*psychology; *Taste | ||||
| Abstract |
The ability of ponies to learn to avoid a relatively novel food associated with illness was tested in three situations: when illness occurred immediately after consuming a feed; when illness occurred 30 min after consuming a feed; and when illness was contingent upon eating one of three feeds offered simultaneously. Apomorphine was used to produce illness. The feeds associated with illness were corn, alfalfa pellets, sweet feed and a complete pelleted feed. The ponies learned to avoid all the fees except the complete feed when apomorphine injection immediately followed consumption of the feed. However, the ponies did not learn to avoid a feed if apomorphine was delayed 30 min after feed consumption. They could learn to avoid alfalfa pellets, but not corn, when these feeds were presented with the familiar “safe foods,” oats and soybean meal. Ponies apparently are able to learn a taste aversion, but there were constraints on this learning ability. Under the conditions of this study, they did not learn to avoid a food that made them sick long after consumption of the food, and they had more difficulty learning to avoid highly palatable feeds. | ||||
| Address | Cornell University, Ithaca, NY 14853 | ||||
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| Language | English | Summary Language | Original Title | ||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0021-8812 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:2401656 | Approved | no | ||
| Call Number | refbase @ user @ | Serial | 41 | ||
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| Author | Heffner, R.S.; Heffner, H.E. | ||||
| Title | Localization of tones by horses: use of binaural cues and the role of the superior olivary complex | Type | Journal Article | ||
| Year | 1986 | Publication | Behavioral Neuroscience | Abbreviated Journal | Behav Neurosci |
| Volume | 100 | Issue | 1 | Pages | 93-103 |
| Keywords | Animals; Auditory Pathways/physiology; Auditory Perception/*physiology; Avoidance Learning/physiology; Brain Mapping; Electroshock; Female; Horses/*physiology; Male; Olivary Nucleus/anatomy & histology/*physiology; Orientation/physiology; Pitch Perception/physiology; Sound Localization/*physiology | ||||
| Abstract |
The ability of horses to use binaural time and intensity difference cues to localize sound was assessed in free-field localization tests by using pure tones. The animals were required to discriminate the locus of a single tone pip ranging in frequency from 250 Hz to 25 kHz emitted by loudspeakers located 30 degrees to the left and right of the animals' midline (60 degrees total separation). Three animals were tested with a two-choice procedure; 2 additional animals were tested with a conditioned avoidance procedure. All 5 animals were able to localize 250 Hz, 500 Hz, and 1 kHz but were completely unable to localize 2 kHz and above. Because the frequency of ambiguity for the binaural phase cue delta phi for horses in this test was calculated to be 1.5 kHz, these results indicate that horses can use binaural time differences in the form of delta phi but are unable to use binaural intensity differences. This finding was supported by an unconditioned orientation test involving 4 additional horses, which showed that horses correctly orient to a 500-Hz tone pip but not to an 8-kHz tone pip. Analysis of the superior olivary complex, the brain stem nucleus at which binaural interactions first take place, reveals that the lateral superior olive (LSO) is relatively small in the horse and lacks the laminar arrangement of bipolar cells characteristic of the LSO of most mammals that can use binaural delta I. | ||||
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| Language | English | Summary Language | Original Title | ||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0735-7044 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:3954885 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 5634 | ||
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| Author | Haruta, N.; Kitagawa, T. | ||||
| Title | Time-resolved UV resonance Raman investigation of protein folding using a rapid mixer: characterization of kinetic folding intermediates of apomyoglobin | Type | Journal Article | ||
| Year | 2002 | Publication | Biochemistry | Abbreviated Journal | Biochemistry |
| Volume | 41 | Issue | 21 | Pages | 6595-6604 |
| Keywords | Animals; Apoproteins/*chemistry; Circular Dichroism; Holoenzymes/chemistry; Horses; Hydrochloric Acid/chemistry; Hydrogen-Ion Concentration; Imidazoles/chemistry; Kinetics; Models, Molecular; Myoglobin/*chemistry; Peptide Fragments/chemistry; *Protein Folding; Protein Structure, Secondary; Spectrum Analysis, Raman/*methods; Tryptophan/*chemistry; Ultraviolet Rays; Whales | ||||
| Abstract |
The 244-nm excited transient UV resonance Raman spectra are observed for the refolding intermediates of horse apomyoglobin (h-apoMb) with a newly constructed mixed flow cell system, and the results are interpreted on the basis of the spectra observed for the equilibrium acid unfolding of the same protein. The dead time of mixing, which was determined with the appearance of UV Raman bands of imidazolium upon mixing of imidazole with acid, was 150 micros under the flow rate that was adopted. The pH-jump experiments of h-apoMb from pH 2.2 to 5.6 conducted with this device demonstrated the presence of three folding intermediates. On the basis of the analysis of W3 and W7 bands of Trp7 and Trp14, the first intermediate, formed before 250 micros, involved incorporation of Trp14 into the alpha-helix from a random coil. The frequency shift of the W3 band of Trp14 observed for this process was reproduced with a model peptide of the A helix when it forms the alpha-helix. In the second intermediate, formed around 1 ms after the start of refolding, the surroundings of both Trp7 and Trp14 were significantly hydrophobic, suggesting the formation of the hydrophobic core. In the third intermediate appearing around 3 ms, the hydrophobicity was relaxed to the same level as that of the pH 4 equilibrium intermediate, which was investigated in detail with the stationary state technique. The change from the third intermediate to the native state needs more time than 40 ms, while the appearance of the native spectrum after the mixing of the same solutions was confirmed separately. | ||||
| Address | School of Mathematical and Physical Sciences, The Graduate University for Advanced Studies, Myodaiji, Okazaki 444-8585, Japan | ||||
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| Language | English | Summary Language | Original Title | ||
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| ISSN | 0006-2960 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:12022863 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 3785 | ||
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| Author | VanDierendonck, M.C.; de Vries, H.; Schilder, M.B.H. | ||||
| Title | An Analysis of Dominance, Its Behavioural Parameters and Possible Determinants in a Herd of Icelandic orses in Captivity | Type | Journal Article | ||
| Year | 1995 | Publication | Netherlands Journal of Zoology | Abbreviated Journal | Netherl. J. Zool. |
| Volume | 45 | Issue | 3-4 | Pages | 362-385 |
| Keywords | Dominance; rank order; horses; Icelandic horses. | ||||
| Abstract |
Th e applicability of the concept of dominance was investigated in a captive herd of  Icelandic horses and  ponies of diff erent breeds. Eight out of  behaviours possibly related to dominance occurred frequently enough to be investigated in detail. For these eight agonistic behaviours the coverage, the unidirectionality in the exchange, and the degree of transitivity (Landau`s linearity index) were calculated. Four off ensive behaviours, together with avoidance, were suitable for further analysis with regard to dominance. Th e patterns of asymmetries with which these behaviours were exchanged were suffi ciently similar as to justify the application of the dominance concept and to construct a (nearly) linear dominance hierarchy. Th e rank order of the castrated stallions was completely linear, the hierarchy of the mares was almost completely linear. Th e results suggest that off ensive and defensive aggressive behaviours should be treated separately and that the concept of dominance is applicable. However, ritualized formal dominance signals between adult horses appear to be (almost) absent. Th e rank positions of the individuals were correlated with age and residency in the herd but not with height. Middle ranking horses tended to be more frequently in the close vicinity of another horse than high ranking or low ranking horses. Over and above this correlation at the individual level, it was found that pairs of horses close in rank to each other were more often also spatially close to each other. Being in oestrus did not infl uence the dominance relationships between mares. For castrated stallions the rank positions were correlated with the age at which they were castrated. Th is suggests that in male horses experience prior to neutering infl uences the behaviour afterwards. |
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| Notes | Approved | no | |||
| Call Number | refbase @ user @ | Serial | 440 | ||
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