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Author |
Birch, H.L.; Bailey, A.J.; Goodship, A.E. |
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Title |
Macroscopic 'degeneration' of equine superficial digital flexor tendon is accompanied by a change in extracellular matrix composition |
Type |
Journal Article |
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Year |
1998 |
Publication |
Equine Veterinary Journal |
Abbreviated Journal |
Equine Vet J |
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Volume |
30 |
Issue |
6 |
Pages |
534-539 |
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Keywords |
Animals; Collagen/analysis; DNA/analysis; Extracellular Matrix/*chemistry; Glycosaminoglycans/analysis; Horses/injuries/*physiology; Immunohistochemistry; Rupture/veterinary; Tendon Injuries/metabolism/pathology/veterinary; Tendons/chemistry/*pathology; Water/analysis |
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Abstract |
Injuries to the superficial digital flexor tendon are common in horses required to gallop and jump at speed. Partial rupture of this tendon usually occurs in the central core of the midmetacarpal region and may be preceded by localised degenerative changes. Post mortem examination of apparently normal equine flexor tendons has revealed an abnormal macroscopic appearance in the central core, characterised by a reddish discolouration. We have previously shown that there is also physical damage to the collagen fibres. In the present study we tested the hypothesis that the abnormal appearance is accompanied by changes in the composition of the extracellular matrix of the tendon. Biochemical analysis of the extracellular matrix demonstrated an increase in total sulphated glycosaminoglycan content, increase in the proportion of type III collagen and decrease in collagen linked fluorescence in the central core of 'degenerated' tendons relative to tissue from the peripheral region of the same tendon. Dry matter content and total collagen content were not significantly different between tendon zones or normal and 'degenerated' tendons. These changes suggest a change in cell metabolism and matrix turnover in the central core of the tendon and are likely to contribute to a decrease in mechanical properties in this part of the tendon, predisposing to the characteristic partial rupture of the tendon. |
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Veterinary Basic Sciences, Royal Veterinary College, North Mymms, Hatfield, UK |
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0425-1644 |
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PMID:9844973 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
3794 |
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Author |
Gilmanshin, R.; Callender, R.H.; Dyer, R.B. |
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Title |
The core of apomyoglobin E-form folds at the diffusion limit |
Type |
Journal Article |
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Year |
1998 |
Publication |
Nature Structural Biology |
Abbreviated Journal |
Nat Struct Biol |
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Volume |
5 |
Issue |
5 |
Pages |
363-365 |
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Keywords |
Animals; Apoproteins/*chemistry; Diffusion; Horses; Myoglobin/*chemistry; *Protein Folding; Spectroscopy, Fourier Transform Infrared; Temperature |
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Abstract |
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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Call Number |
Equine Behaviour @ team @ |
Serial |
3795 |
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Author |
Jolly, A. |
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Title |
Pair-bonding, female aggression and the evolution of lemur societies |
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Journal Article |
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Year |
1998 |
Publication |
Folia Primatologica; International Journal of Primatology |
Abbreviated Journal |
Folia Primatol (Basel) |
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Volume |
69 Suppl 1 |
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1-13 |
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Keywords |
*Aggression; Animals; Evolution; Female; Intelligence; Lemur/*psychology; Male; *Pair Bond; Sex Factors; Social Dominance; Strepsirhini/psychology |
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Abstract |
Lemur societies have been described as convergent with those of anthropoids, including Papio-like female-bonded multi-male groups. Recent research, however, shows at least 5 pair-bonded species among the Lemuridae and Indriidae. Three more, Eulemur mongoz, Eulemur fulvus and Varecia variegata, have societies combining aspects of pairing with aspects of troop life. The best-known female-bonded societies, those of Lemur catta, Propithecus diadema edwardsi and Propithecus verreauxi, may be assemblages of mother-daughter dyads, capable of high aggression towards other females, but derived from more solitary female ancestors, perhaps also living as pairs. The internal structure of such lemur groups differs from the more extensive kin groups of catarrhines. This in turn may relate to the lemurs' level of social intelligence and to lemur female dominance over males. |
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Department of Ecology and Evolutionary Biology, Princeton University, N.J. 08544, USA. ajolly@princeton.edu |
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0015-5713 |
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Notes |
PMID:9595685 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4179 |
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Author |
Kesel, L.; Neil, D.H. |
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Title |
Restraint and handling of animals |
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Journal Article |
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Year |
1998 |
Publication |
Clinical Textbook for Veterinary Technicians. 4th ed. |
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1-26 |
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Cited By (since 1996): 1; Export Date: 21 October 2008 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4523 |
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Author |
Luescher, U.A.; McKeown, D.B.; Dean, H. |
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Title |
A cross-sectional study on compulsive behaviour (stable vices) in horses |
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Journal Article |
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Year |
1998 |
Publication |
Equine veterinary journal. Supplement |
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Issue |
27 |
Pages |
14-18 |
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Cited By (since 1996): 22; Export Date: 21 October 2008 |
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Equine Behaviour @ team @ |
Serial |
4527 |
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Author |
Peters, G.; Tembrock, G. |
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Title |
Subharmonics, biphonation, and deterministic chaos in mammal vocalizations |
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Journal Article |
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Year |
1998 |
Publication |
Bioacoustics |
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9 |
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Equine Behaviour @ team @ Peters1998 |
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6483 |
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Title |
Animal Acoustic Communication: Sound Analysis and Research Methods |
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Book Whole |
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Year |
1998 |
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Springer |
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Berlin |
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Call Number |
Equine Behaviour @ team @ ref56 |
Serial |
6497 |
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Author |
Oakenfull, E.A.; Ryder, O.A. |
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Title |
Mitochondrial control region and 12S rRNA variation in Przewalski's horse (Equus przewalskii) |
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Journal Article |
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Year |
1998 |
Publication |
Animal Genetics |
Abbreviated Journal |
Anim Genet |
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Volume |
29 |
Issue |
6 |
Pages |
456-459 |
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Keywords |
Animals; DNA, Mitochondrial/*genetics; Female; *Genetic Variation; Horses/*genetics; Male; Pedigree; RNA, Ribosomal/*genetics |
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Abstract |
Variation in the control region and the 12S rRNA gene of all surviving mitochondrial lineages of Przewalski's horse was investigated. Variation is low despite the present day population being descended from 13 individuals probably representing animals from three different regions of its range. Phylogenetic comparison of these sequences, with sequences for the domestic horse, does not resolve the ancestral status of either horse. |
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Center for Reproduction of Endangered Species, Zoological Society of San Diego, CA 92112, USA |
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0268-9146 |
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Notes |
PMID:9883508 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
5040 |
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Author |
Oliveira, R. F.; McGregor, P.K.; Latruffe, C. |
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Title |
Know thine enemy: fighting fish gather information from observing conspecific interactions |
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Journal Article |
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Year |
1998 |
Publication |
Proceedings of the Royal Society B: Biological Sciences |
Abbreviated Journal |
Proc. Roy. Soc. Lond. B Biol. Sci. |
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Volume |
265 |
Issue |
1401 |
Pages |
1045-1049 |
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Abstract |
Many of the signals that animals use to communicate transmit relatively large distances and therefore encompass several potential signallers and receivers. This observation challenges the common characterization of animal communication systems as consisting of one signaller and one receiver. Furthermore, it suggests that the evolution of communication behaviour must be considered as occurring in the context of communication networks rather than dyads. Although considerations of selection pressures acting upon signallers in the context of communication networks have rarely been expressed in such terms, it has been noted that many signals exchanged during aggressive interactions will transmit far further than required for information transfer between the individuals directly involved, suggesting that these signals have been designed to be received by other, more distant, individuals. Here we consider the potential for receivers in communication networks to gather information, one aspect of which has been termed eavesdropping. We show that male Betta splendens monitor aggressive interactions between neighbouring conspecifics and use the information on relative fighting ability in subsequent aggressive interactions with the males they have observed. |
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Equine Behaviour @ team @ |
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2168 |
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Author |
Barton, N. |
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Title |
Evolutionary biology: The geometry of adaptation |
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Journal Article |
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Year |
1998 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
395 |
Issue |
6704 |
Pages |
751-752 |
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0028-0836 |
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Notes |
10.1038/27338 |
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Equine Behaviour @ team @ |
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5469 |
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