Analyze Diet

Topic:Observational Study

Observational studies in horses involve systematically assessing and recording behaviors, conditions, or other characteristics without manipulating the study environment. These studies provide insights into natural equine behaviors, health conditions, and interactions with their environment. Researchers often focus on aspects such as herd dynamics, feeding patterns, or responses to environmental changes. The data collected can help identify trends, correlations, and potential risk factors for certain conditions. This page compiles peer-reviewed research studies and scholarly articles that explore various observational methodologies and their applications in understanding equine behavior and health.
[Experience report following one-year’s activity of the department “horseback riding as therapy” in the Reit- und Fahrverein Schwäbisch Hall].
ZFA. Zeitschrift fur Allgemeinmedizin    January 10, 1976   Volume 52, Issue 1 35-49 
Gerster E.No abstract available
Osteodystrophia fibrosa in horses at pasture in Queensland: field and laboratory observations.
Australian veterinary journal    January 1, 1976   Volume 52, Issue 1 11-16 doi: 10.1111/j.1751-0813.1976.tb05362.x
Walthall JC, McKenzie RA.Horses grazing manily Cenchrus ciliaris and/or Panicum maximum var. trichoglume pastures on over 30 properties in southern central Queensland developed lesions of osteodystrophia fibrosa. Horses on individual properties in coastal Queensland grazing Setaria anceps, Brachiaria mutica or Pennisetum clandestinum also developed the disease. Ill-thrift, lameness, and fibrous swellings of nasal bones, maxillae and mandibles were observed. Calcium and phosphorus levels of pasture were normal but all the above pasture species contained oxalates which were suspected of causing the disease.
Cardiac monitoring during exercise tests in the horse. 2. Heart rate responses to exercise.
Australian veterinary journal    January 1, 1976   Volume 52, Issue 1 1-5 doi: 10.1111/j.1751-0813.1976.tb05358.x
Hall MC, Steel JD, Stewart GA.Data on resting heart rates, pre-exercise heart rates, the anticipatory rises before exercise, the influence of speed of work and recovery heart rates have been presented. Some observations on differences in the heart rate response on slow and fast working days are also recorded. In conformity with other workers, a linear relationship between heart rate and working speed within the range of 400-800 metre/min was observed. When the speed of work was between 400-800 metre/min, horses with resting ECG's classed as abnormal had significantly higher heart rates than those regarded as normal. It was...
Animal behavior as a subject for veterinary students.
The Cornell veterinarian    January 1, 1976   Volume 66, Issue 1 73-81 
Houpt KA.Knowledge of animal behavior is an important asset for the veterinarian; therefore a course in veterinary animal behavior is offered at the New York State College of Veterinary Medicine as an elective. The course emphasizes the behavior of those species of most interest to the practicing veterinarian: cats, dogs, horses, cows, pigs and sheep. Dominance heirarchies, animal communication, aggressive behavior, sexual behavior and maternal behavior are discussed. Play, learning, diurnal cycles of activity and sleep, and controls of ingestive behavior are also considered. Exotic and zoo animal beha...
Incidence and nature of horse-riding injuries. A one-year prospective study.
Acta chirurgica Scandinavica    January 1, 1976   Volume 142, Issue 1 57-61 
Gierup J, Larsson M, Lennquist S.A prospective one-year study of horse-riding accidents was performed in an area with a very high frequency of amateur riding. Totally 174 patients with riding injuries were registered--66% children--making an incidence of only 0.7 per thousand riding occasions. However, many of these injuries were of a severe nature, one leading to death and 27 of the patients reporting persisting symptoms at follow-up one year after the accident. Eleven per cent of the accidents lead to cerebral injuries and 44% to fractures, mainly of the upper extremities. Eleven per cent required hospitalization and 17% op...
Intra-articular treatment of arthritis in race-horses with sodium hyaluronate.
Acta veterinaria Scandinavica    January 1, 1976   Volume 17, Issue 4 379-394 doi: 10.1186/BF03547893
Asheim A, Lindblad G.Forty-five race-horses with arthritis of non-in-fectious type in 54 joints were treated with sodium hyaluronate intra-articularly. All joints had previously been treated without lasting success by conventional methods, such as firing, blistering or intraarticular injection of cortisone. In most cases only 1 injection of 2 ml (20 mg) sodium hyaluronate was needed. To avoid subjective evaluation, the effects of the treatment were based on the joint’s capacity of withstanding extreme stress, which means that the horse should be able to train and race again. The treatment was concentrated on the...
Observations upon the shoeing of horses.
Modern veterinary practice    December 1, 1975   Volume 56, Issue 12 845-847 
Clark J.No abstract available
Observations on the time of foaling in thoroughbred mares in Australia.
Journal of reproduction and fertility. Supplement    October 1, 1975   Issue 23 545-546 
Bain AM, Howey WP.No abstract available
Recent observations concerning Klebsiella infections in stallions.
Journal of reproduction and fertility. Supplement    October 1, 1975   Issue 23 143-145 
Merkt H, Klug E, Bohm KH, Weiss R.A high incidence of Klebsiella contamination in German 'Warmblut' and Thoroughbred stallions is reported. The organism was recovered from the nostrils, prepuce, pre-ejacultory secretion and, in some cases, on the body surface, in the faeces and on the ground of the covering (mating) yard. Fertility was not affected. However, differences of virulence were observed and Type 5 proved to be the most pathogenic.
Pelviscopy in the mare.
Journal of reproduction and fertility. Supplement    October 1, 1975   Issue 23 319-321 
Heinze H.A method of endoscopic examination of the internal genital (pelvic) organs of the mare is described. Special emphasis is placed on the induction of artificial pneumoperitoneum and the installation of an endoscopic peritoneal fistula device for prolonged observation. The potential of pelviscopy in the mare as a diagnostic aid, a new device for research in equine reproduction and as an auxillary aid to teaching is discussed.
A survey of eggs in the oviducts of mares.
Journal of reproduction and fertility. Supplement    October 1, 1975   Issue 23 513-517 
David JS.A total of 424 eggs was recovered from flushings of 176 pairs of oviducts. Of these eggs, 324 were in a state of advanced degeneration (Type 4) and ten appeared to have been recently ovulated (Type 1). The number of eggs/oviduct varied from 0 to 13, most being up to 3 eggs, but fifty oviducts contained no eggs. It is widely believed that unfertilized ova are selectively retained in the oviducts but an alternative explanation for their presence is put forward.
Control of fertility in Thoroughbred horses in West Germany.
Journal of reproduction and fertility. Supplement    October 1, 1975   Issue 23 311-313 
von Lepel J.A central control system for German Thoroughbred horses is described. Autumn examination of mares and stallions enables them to be classified according to breeding potential. The results of 25 years of study are reported.
Some clinical observations on the effect of an implant of oestradiol benzoate in brood mares.
Journal of reproduction and fertility. Supplement    October 1, 1975   Issue 23 303-306 
Azzie MA.The clinical effects and therapeutic value of a 500 mg implant of oestradiol benzoate was observed in thirty-nine Thoroughbred brood mares showing various abnormalities of the ovary and/or the reproductive tract. Sixteen similarly affected, untreated mares acted as controls. The implant was inserted during the early part of the normal anoestrous period and was removed 6 to 10 weeks later. The conception rate among the treated group (59%) during the onset of the ensuing breeding season was significantly higher (P less than 0-02) than that in the control group. The value of this form of treatmen...
Sperm transport and distribution in the mare.
Journal of reproduction and fertility. Supplement    October 1, 1975   Issue 23 63-66 
Parker WG, Sullivan JJ, First NL.Fifty mares were inseminated on Days 2, 4, 7, 11 or 17 of the oestrous cycle with spermatozoa from one of three stallions to observe the distribution of the spermatozoa in various parts of the reproductive tract 12 hr later (Days 3, 5, 8, 12 and 18). Only 0-06 to 2-21% of inseminated spermatozoa were recovered from the tract. More (P less than 0-05) spermatozoa were recovered from the cervix and uterus on Day 12 than on Days 3, 5, 8 and 18. The mean number of spermatozoa recovered from either or both oviducts was significantly greater (P less than 0-10) on Days 5 and 8 than on Days 3, 12 and 1...
Observations on reproductive performance in the yearling mare.
Journal of reproduction and fertility. Supplement    October 1, 1975   Issue 23 531-536 
Mitchell D, Allen WR.Reproductive performance was studied in 137 yearling mares run with stallions in small groups for 3 months between June and August in 1968 to 1971 (four breeding seasons). Pregnancy diagnosis by repeated rectal palpation and qualitative tests for PMSG, showed that ninety-five mares conceived of which forty-four aborted spontaneously between Days 30 and 160 of gestation. Laboratory examination of twenty-one aborted fetuses failed to show any infectious agents. Serial quantitative and qualitative tests for PMSG in aborting animals gave results similar to those observed in mares with normal pregn...
The oestrous cycle of the mare.
Journal of reproduction and fertility. Supplement    October 1, 1975   Issue 23 161-166 
Hughes JP, Stabenfeldt GH, Evans JW.In eleven non-pregnant mares examined for 2 years, oestrous cycle length was 20-6 days (range 13 to 34) excluding any anoestrous periods. The duration of oestrus was 5-7 days (range 1 to 24); from February to May it was 7-6 days (range 2 to 24) and from May to November 4-8 days (range 1 to 10). The majority of ovulations occurred between 16.00 and 08.00 hours and 78% of the mares ovulated within 48 hr of the end of oestrus. Mean follicular diameter was 45 mm on the day of ovulation and there was a 25-5% incidence of multiple ovulations. It was uncommon for oestrus to occur without ovulation, w...
Urinary oestrogen and plasma progesterone levels in non-pregnant mares.
Journal of reproduction and fertility. Supplement    October 1, 1975   Issue 23 213-221 
Palmer E, Jousset B.Eight mares were observed clinically for 14 months to detect oestrus and ovarian activity, and assays of urinary oestrogens and plasma progesterone were performed. Cyclical ovarian activity occurred during 60% of the experimental period. Persistent luteal activity was found over 20% of the period and for the rest of the time activity was absent. Cyclical activity was characterized by the alternation of periods of low and high progesterone levels corresponding to the follicular and luteal phases of the ovarian cycle. During the follicular phase, urinary oestrogen levels increased to a maximum o...
Plasma LH levels in the mare during the oestrous cycle.
Journal of reproduction and fertility. Supplement    October 1, 1975   Issue 23 207-212 
Geschwind II, Dewey R, Hughes JP, Evans JW, Stabenfeldt GH.Plasma levels of LH were determined by heterologous radioimmunoassay utilizing highly purified equine LH as standard. Samples were taken regularly from eleven mares for twenty-six oestrous cycles over a period of 10 weeks. The mean cycle length was 20-5 +/- 3-1 (S.D.) days, and ovulation occurred on average 4-3 +/- 1-6 (S.D.) days from the time heat was first detected. Levels of LH were persistently low from Days 5 to 16 of the cycle (ovulation = Day 0). They then increased slowly over a number of days and continued to rise beyond the levels observed at any time during the immediate preovulato...
Reproduction in feral horses.
Journal of reproduction and fertility. Supplement    October 1, 1975   Issue 23 13-18 
Feist JD, McCullough DR.A behavioural study of feral horses was conducted on the Pryor Mountain Wild Horse Range in the western United States. All 270 horses on the Range were identified individually. The sex ratio was nearly balanced. Foal to adult female ratio was 43-2:100. Morality was concentrated among foals and old horses. Horses were organized as forty-four harem groups each with a dominant stallion, one to two immature stallions, one to three immature mares, one to three adult mares and their yearling and foal offspring, and 23 bachelor groups of one to eight stallions. Harem groups were quite stable year-rou...
Observations on the equine hypophysial protal system.
Zentralblatt fur Veterinarmedizin. Reihe C: Anatomie, Histologie, Embryologie    June 1, 1975   Volume 4, Issue 2 149-161 doi: 10.1111/j.1439-0264.1975.tb00633.x
Vitums A.No abstract available
Sequelae of Venezuelan equine encephalitis in humans: a four year follow-up.
International journal of epidemiology    June 1, 1975   Volume 4, Issue 2 131-140 doi: 10.1093/ije/4.2.131
León CA.The purpose of this study was the identification of possible sequelae of the infection of human individuals with Virus of Venezuelan Equine Encephalitis (VEE). Special emphasis was laid on exploring neurological, psychological and behavioural aspects and particularly on the search for a possible association of the disease with epileptic phenomena, brain damage and/or mental deficiency. A four-year period of observation was conducted on a sample of children from El Carmelo (Colombia) where an epidemic of VEE took place in 1967. A group of seven children who presented the encephalitic type of th...
Observations on the T wave of the equine electrocardiogram.
Equine veterinary journal    April 1, 1975   Volume 7, Issue 2 55-62 doi: 10.1111/j.2042-3306.1975.tb03230.x
Holmes JR, Rezakhani A.The paper describes changes observed in the T wave and T vectorcardiogram in horse after various periods of exercise. Using radiotelemetry and a bipole lead all horses showed negative T waves immediately after exercise. In some of them this was followed by a markedly positive T deflection. Possible reasons for these changes are briefly discussed.
[Studies on the duration of feeding, masticatory frequency and mincing of feed in horses].
DTW. Deutsche tierarztliche Wochenschrift    February 5, 1975   Volume 82, Issue 2 54-58 
Meyer H, Ahiswedeu L, Reinhardt HJ.No abstract available
Urination by racehorses as related to environmental factors.
The Canadian veterinary journal = La revue veterinaire canadienne    January 1, 1975   Volume 16, Issue 1 16-17 
Hutson LR.No abstract available
Presence of the arteria caroticobasilaris in the horse.
Anatomischer Anzeiger    January 1, 1975   Volume 137, Issue 1-2 116-119 
Nanda BS, Getty R.The consistent presence of the caroticobasilar artery was observed and discussed in view of the anatomical normalities in the horse. The persistence of the above vessel was correlated with the developmental changes in the cranial and cerebral arteries.
Observations and procedures at foaling on a thoroughbred stud.
Australian veterinary journal    December 1, 1974   Volume 50, Issue 12 553-557 doi: 10.1111/j.1751-0813.1974.tb14075.x
Barty KJ.No abstract available
Letter: Questions interpretation of observations on pulmonary ventilation in horses.
Veterinary medicine, small animal clinician : VM, SAC    November 1, 1974   Volume 69, Issue 11 1354-1356 
Heavner JE.No abstract available
Clinical and pathological observations on five cases of equine sarcoidosis identified in Romania.
Zentralblatt fur Veterinarmedizin. Reihe A    November 1, 1974   Volume 21, Issue 10 815-823 doi: 10.1111/j.1439-0442.1974.tb01342.x
Ivascu I, Simu G, Muresan E, Pápay Z.No abstract available
Observations on the sexual behavior of nonlactating mares.
Journal of the American Veterinary Medical Association    October 15, 1974   Volume 165, Issue 8 717-720 
Back DG, Pickett BW, Voss JL, Seidel GE.No abstract available
Observations on the specific location of Gasterophilus spp. larvae in the mouth of the horse.
The Journal of parasitology    October 1, 1974   Volume 60, Issue 5 891-892 
Tolliver SC, Lyons ET, Drudge JH.No abstract available
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