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Showing 1 to 20 of 42 for “"Yearlings"”.
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The influence of month of birth on growth and development of thoroughbred foals and yearlings
Thirteen Thoroughbred farms in Virginia provided 260 horses for the study of growth patterns of horses from birth to July of the yearling year. Measurements included heart girth, wither and hip height, body length, chest width, knee to ground length, cannon bone circumference and body weight, as …
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Proximal Causes of Dispersal in Yellow-Bellied Marmots.
… that agonistic behavior between adults and yearlings is not necessary for dispersal to occur. Dispersal of male yearlings appears to be independent of adult-yearling interactions, although dispersal of female yearlings probably is mediated by social interactions. Individual behavioral …
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The effect of loading upon hoof wall growth and hoof shape in the Thoroughbred foal
… were recorded in foals (n=80) and weanlings/yearlings (n=12) and the hoof wall structure of histological samples of fetuses and paediatric foals (n=15) was determined. Solar loading, hoof growth, and hoof angle was recorded in healthy foals (n=18) and compared to a group with acquired …
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Evaluations of Techniques for Estimating Fall Age Ratios of Canada and Snow Geese
… other groups contained parents and young plus yearlings and unknown aged adults, possibly non-breeders. Cannon-net catches and hunter-bag checks were biased and favored immature snow and Canada geese because the young birds were not as wary as adults and were more vulnerable to the net and gun. …
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Carbohydrate and Fat Supplementation in Grazing Mares and Foals
… status of grazing mares, foals, weanlings and yearlings, fed either a starch and sugar supplement (SS) or a fat and fiber supplement (FF), was examined using growth measurements, radiographic bone evaluations, milk composition and glucose tolerance tests. These studies suggest that fiber may be …
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Growth and the Somatotropic Axis in Young Thoroughbreds
… glucose, insulin, GH, and IGF-I was described in yearlings fed two meals a day. Finally, an association between ADG and IGF-I was described in Thoroughbreds from birth to 16 mo of age. Feeding diets to the foal that influence the somatotropic axis during growth may affect development of growth …
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Population Characteristics of Urban White-Tailed Deer (Odocoileus Virginianus) in Southern Springfield, Missouri
… An approximate age ratio of 4:1:1, fawns: yearlings: adults existed for the marked portion of the population. A sex ratio of 3:1, females: male was determined for yearlings and adults within the population. An annual mortality rate of 13.2% was established for the marked portion of the …
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Survival, family breakups, and dispersal of yearling and subadult black bears in western Virginia
… We monitored 6 black bear family groups with 12 yearlings (6M : 6F) to determine the timing of family breakup; we intensely monitored 3 of the family groups to document home range establishment and movements by 5 subadult bears (2M : 3F) following separation from their mothers. Estimated dates of …
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A study of growth rate and type score of offspring of four different sires in Hereford cattle
… to 240 days at weaning and 395 days as yearlings. The analysis of variance, regression, and correlation were used in the analysis and interpretation of the data. Heritability of weaning weight and type score was estimated from intra-class correlation obtained from the analysis of …
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Nutritional Management Affects Feedlot Performance, Carcass Characteristics and the Relationships of Intramuscular Fat, Subcutaneous Fat, and Feed Efficiency of Normal and Early -Weaned Heifers
… to heifers grazed on pasture and finished as yearlings, heifers finished as calves gained more efficiently at any given fat thickness (P ≤ 0.01) and deposited intramuscular fat at a faster (P ≤ 0.01) rate relative to subcutaneous fat. As two-year-olds, Angus heifers tended to gain more …
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Descriptive aspects of two fawn populations as delineated by reproductive differences
… in average heterozygosity between fawns or yearlings of the 2 areas was observed, but upland adult females were significantly more heterozygous than adult swamp females. Changes occurred in average heterozygosity in swamp females during 1970 and 1971; fawns and yearlings were significantly …
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Evaluation of a technique employing the chemosterilant diethylstilbestrol for suppressing reproduction of wild foxes in Virginia
… Two of five marked females probably were yearlings; the unmarked female was 4 or more years old. Five of six female gray foxes from reference areas successfully reproduced. The barren female was an anovulatory yearling. At the P<0.025 level (l d.f., chi-square = 5.17) unsuccessful …
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Ram performance testing programs in Virginia
… (P < .001) of OW and DG was .22 and -.20 for yearlings and ram lambs, respectively. Age and DG were correlated (P < .001) with a coefficient of -.20 for both yearlings and ram lambs. Yearling rams' SHT, HHT and BLGTH were highly correlated ( P < . 001), and cannon length was moderately …
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Studies of Hypoderma lineatum and Hypoderma bovis with especial reference to economic importance and control
… Virginia generally. 2. Young cattle, calves and yearlings particularly, are generally more heavily infested than older cattle. 3. Adults appear in Burkes Garden the first warm days in April though they are at their worst in June and July, a normal season. 4. Larvae ordinarily make their first …
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Population dynamics and denning ecology of black bears in Shenandoah National Park, Virginia
… rates were estimated at 30% for cubs, 54% for yearlings, 39% for 2-year olds, and 21.5% for older bears. Radio collared adult males had an annual mortality rate of 41.5%, over 5-fold that of adult females (7.5%). Bear density was estimated at 1 bear/0.96-1.49 km'. This high density was …
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Utility of inbreeding coefficient and sire as predictors for osteochondrosis risk in Standardbred horses
… this in a cohort of 910 Standardbred yearlings fluoroscopically screened for osteochondral fragments. Controls (n = 545) were defined as horses that had no osteochondral fragments in any joint. Two groups of cases were defined; those with ostechondrosis dissecans (OCD) of the hock (n = …
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Tooth lesions and fluoride content in teeth, bones and antlers of mule deer (Odocoileus hemionus)
… and bones were lower (P<O. 001) in fawns and yearlings than in older animals and in males (> I. 5 years) than in females. Median fluoride concentrations were lower (P<O. 001) in deciduous than in permanent teeth. Median concentrations of fluoride were higher (P<O.OO1) in non-erupted teeth than …
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Population Viability Analysis of Swift fox (Vulpes velox) at the Badlands National Park
… Monthly apparent survival probability of pups, yearlings, and adults was 0.88 (95% CI: 0.86-0.90), 0.90 (95% CI: 0.88-0.92), and 0.93 (95% CI: 0.91-0.94), respectively, in our study area. Accordingly, the annual apparent survival probability of pups, yearlings, and adults in our study area was …
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A proof of concept to differentiate among differences in flavor of American lamb using volatile flavor compound analysis
… groups [ young lambs (0 permanent incisors), yearlings (2 permanent incisors) and mature sheep or mutton (>2 permanent incisors)] to establish a proof of concept for differentiating the inherent differences in flavor that exist in meat from ovine animals of various age classes using volatile …
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