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Framescore Question
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<blockquote data-quote="blackcowz" data-source="post: 608073" data-attributes="member: 8834"><p>Yes, there are charts. No, it ain't the same across breeds, ages, or sexes. Attached is a good peice of literature on it. </p><p></p><p>BULLS </p><p>Frame Score = -11.548 + .04878 (Height) - 0.0289 (Days of Age) +</p><p> 0.00001947 (Days of Age)2 + 0.0000334 (Height) (Days of Age)</p><p>Age in -------------------------- Frame Score ---------------------------</p><p>Months 1 2 3 4 5 6 7 8 9</p><p> ---------------------------------------------------------------------------</p><p> 5 33.5 35.5 37.5 39.5 41.6 43.6 45.6 47.7 49.7</p><p> 6 34.8 36.8 38.8 40.8 42.9 44.9 46.9 48.9 51.0</p><p> 7 36.0 38.0 40.0 42.1 44.1 46.1 48.1 50.1 52.2</p><p> 8 37.2 39.2 41.2 43.2 45.2 47.2 49.3 51.3 53.3</p><p> 9 38.2 40.2 42.3 44.3 46.3 48.3 50.3 52.3 54.3</p><p> 10 39.2 41.2 43.3 45.3 47.3 49.3 51.3 53.3 55.3</p><p> 11 40.2 42.2 44.2 46.2 48.2 50.2 52.2 54.2 56.2</p><p> 12 41.0 43.0 45.0 47.0 49.0 51.0 53.0 55.0 57.0</p><p> 13 41.8 43.8 45.8 47.8 49.8 51.8 53.8 55.8 57.7</p><p> 14 42.5 44.5 46.5 48.5 50.4 52.4 54.4 56.4 58.4</p><p> 15 43.1 45.1 47.1 49.1 51.1 53.0 55.0 57.0 59.0</p><p> 16 43.6 45.6 47.6 49.6 51.6 53.6 55.6 57.5 59.5</p><p> 17 44.1 46.1 48.1 50.1 52.0 54.0 56.0 58.0 60.0</p><p> 18 44.5 46.5 48.5 50.5 52.4 54.4 56.4 58.4 60.3</p><p> 19 44.9 46.8 48.8 50.8 52.7 54.1 56.7 sa.7 60.6</p><p> 20 45.1 47.1 49.1 51.0 53.0 55.0 56.9 58.9 60.9</p><p> 21 45.3 47.3 49.2 51.2 53.2 55.1 57.1 59.1 61.0</p><p></p><p>HEIFERS </p><p>Frame Score = -11.7086 + 0.4723 (Height) - 0.0239 (Days of Age) +</p><p> 0.0000146 (Days of Age)2 + 0.0000759 (Height) (Days of Age)</p><p>---------------------------------------------------------------------------</p><p>Age in -------------------------- Frame Score ---------------------------</p><p>Months 1 2 3 4 5 6 7 8 9</p><p>---------------------------------------------------------------------------</p><p> 5 33.1 35.1 37.2 39.3 41.3 43.4 45.5 47.5 49.6</p><p> 6 34.1 36.2 38.2 40.3 42.3 44.4 46.5 48.5 50.6</p><p> 7 35.1 37.1 39.2 41.2 43.3 45.3 41.4 49.4 51.5</p><p> 8 36.0 38.0 40.1 42.1 44.1 46.2 48.2 50.2 52.3</p><p> 9 36.8 38.9 40.9 42.9 44.9 47.0 49.0 51.0 53.0</p><p> 10 37.6 39.6 41.6 43.7 45.7 47.7 49.7 51.7 53.8</p><p> 11 38.3 40.3 42.3 44.3 46.4 48.4 50.4 52.4 54.4</p><p> 12 39.0 41.0 43.0 45.0 47.0 49.0 51.0 53.0 55.0</p><p> 13 39.6 41.6 43.6 45.5 47.5 49.5 51.5 53.5 55.5</p><p> 14 40.1 42.1 44.1 46.1 48.0 50.0 52.0 54.0 56.0</p><p> 15 40.6 42.6 44.5 46.5 48.5 50.5 52.4 54.4 56.4</p><p> 16 41.0 43.0 44.9 46.9 48.9 50.8 52.8 54.8 56.7</p><p> 17 41.4 43.3 45.3 47.2 49.2 51.1 53.1 55.1 57.0</p><p> 18 41.7 43.6 45.6 47.5 49.5 51.4 53.4 55.3 57.3</p><p> 19 41.9 43.9 45.8 47.7 49.7 51.6 53.6 55.5 57.4</p><p> 20 42.1 44.1 46.0 47.9 49.8 51.8 53.7 55.6 57.6</p><p> 21 42.3 44.2 46.1 48.0 50.0 51.9 53.8 55.7 57.7</p><p>---------------------------------------------------------------------------</p><p></p><p></p><p></p><p>Source: Adapted from Boggs, South Dakota State </p><p>University, 1991</p><p></p><p>Greater mature cow weight is associated with increased frame scores, which results in additional feed required for maintenance because of a larger body mass. Stocking rates and quantities of feed need to be adjusted to meet the demands of larger cows. Provided necessary feed is available, larger cows generally meet their higher requirements. Under favorable management, reproductive rates tend to be similar across frame size; however, when the availability of feed becomes restricted, larger framed cattle are more susceptible to reproductive failure. Increasing mature size is a concern and may require adjusting replacement heifer development programs in order to insure they reach heavier prebreeding weights necessary to attain puberty.</p><p>Large frame size is also associated with greater growth potential, longer finishing periods, and heavier slaughter weights. The generally preferred range for carcass weights of 650 to 850 pounds suggests the need to produce feeder cattle with a 5 to 7 range in frame scores. The current USDA feeder cattle grading system is based on the factors of frame size and muscle thickness. Three frame score designations are included: large, medium, and small, which relate to an evaluation by appearance of an animal's skeletal height in relation to its age and the weight at which an animal will produce a choice quality carcass with about .5 inches external fat at the 12th rib. Large frame steers and heifers would not be expected to produce choice carcasses until their live weight exceeds 1200 and 1000 pounds, respectively. Medium frame steers would be expected to produce choice carcasses at live weights of 1000 to 1200 pounds, and heifers at 850 to 1000 pounds. Small frame steers and heifers would produce choice carcasses at live weights of less than 1000 and 850 pounds, respectively.</p><p>An indication of frame size is very important when estimating growing and finishing cattle nutrient requirements and projected feed intake. Although larger framed cattle will generally have increased intakes, energy concentration in the feed that is used for gain (NEg) is lower than that of medium framed cattle. Furthermore, protein requirements for large framed steers have been based on medium framed steers that weigh 15% less. This results in a greater protein requirement for large compared to medium framed cattle.</p><p>Frame score is considered to be moderately to highly heritable. As such, frame score can be significantly changed through selection, primarily achieved through sire selection. With an heritability estimate of .40, about 40% of a bull's difference in frame score from herd average will be passed on to progeny.</p><p>Frame score measurements are descriptive of animal type and growth patterns in beef cattle. They are useful in evaluating animal nutritional requirements, characterizing target market weights, and aid in selection decisions.</p></blockquote><p></p>
[QUOTE="blackcowz, post: 608073, member: 8834"] Yes, there are charts. No, it ain't the same across breeds, ages, or sexes. Attached is a good peice of literature on it. BULLS Frame Score = -11.548 + .04878 (Height) - 0.0289 (Days of Age) + 0.00001947 (Days of Age)2 + 0.0000334 (Height) (Days of Age) Age in -------------------------- Frame Score --------------------------- Months 1 2 3 4 5 6 7 8 9 --------------------------------------------------------------------------- 5 33.5 35.5 37.5 39.5 41.6 43.6 45.6 47.7 49.7 6 34.8 36.8 38.8 40.8 42.9 44.9 46.9 48.9 51.0 7 36.0 38.0 40.0 42.1 44.1 46.1 48.1 50.1 52.2 8 37.2 39.2 41.2 43.2 45.2 47.2 49.3 51.3 53.3 9 38.2 40.2 42.3 44.3 46.3 48.3 50.3 52.3 54.3 10 39.2 41.2 43.3 45.3 47.3 49.3 51.3 53.3 55.3 11 40.2 42.2 44.2 46.2 48.2 50.2 52.2 54.2 56.2 12 41.0 43.0 45.0 47.0 49.0 51.0 53.0 55.0 57.0 13 41.8 43.8 45.8 47.8 49.8 51.8 53.8 55.8 57.7 14 42.5 44.5 46.5 48.5 50.4 52.4 54.4 56.4 58.4 15 43.1 45.1 47.1 49.1 51.1 53.0 55.0 57.0 59.0 16 43.6 45.6 47.6 49.6 51.6 53.6 55.6 57.5 59.5 17 44.1 46.1 48.1 50.1 52.0 54.0 56.0 58.0 60.0 18 44.5 46.5 48.5 50.5 52.4 54.4 56.4 58.4 60.3 19 44.9 46.8 48.8 50.8 52.7 54.1 56.7 sa.7 60.6 20 45.1 47.1 49.1 51.0 53.0 55.0 56.9 58.9 60.9 21 45.3 47.3 49.2 51.2 53.2 55.1 57.1 59.1 61.0 HEIFERS Frame Score = -11.7086 + 0.4723 (Height) - 0.0239 (Days of Age) + 0.0000146 (Days of Age)2 + 0.0000759 (Height) (Days of Age) --------------------------------------------------------------------------- Age in -------------------------- Frame Score --------------------------- Months 1 2 3 4 5 6 7 8 9 --------------------------------------------------------------------------- 5 33.1 35.1 37.2 39.3 41.3 43.4 45.5 47.5 49.6 6 34.1 36.2 38.2 40.3 42.3 44.4 46.5 48.5 50.6 7 35.1 37.1 39.2 41.2 43.3 45.3 41.4 49.4 51.5 8 36.0 38.0 40.1 42.1 44.1 46.2 48.2 50.2 52.3 9 36.8 38.9 40.9 42.9 44.9 47.0 49.0 51.0 53.0 10 37.6 39.6 41.6 43.7 45.7 47.7 49.7 51.7 53.8 11 38.3 40.3 42.3 44.3 46.4 48.4 50.4 52.4 54.4 12 39.0 41.0 43.0 45.0 47.0 49.0 51.0 53.0 55.0 13 39.6 41.6 43.6 45.5 47.5 49.5 51.5 53.5 55.5 14 40.1 42.1 44.1 46.1 48.0 50.0 52.0 54.0 56.0 15 40.6 42.6 44.5 46.5 48.5 50.5 52.4 54.4 56.4 16 41.0 43.0 44.9 46.9 48.9 50.8 52.8 54.8 56.7 17 41.4 43.3 45.3 47.2 49.2 51.1 53.1 55.1 57.0 18 41.7 43.6 45.6 47.5 49.5 51.4 53.4 55.3 57.3 19 41.9 43.9 45.8 47.7 49.7 51.6 53.6 55.5 57.4 20 42.1 44.1 46.0 47.9 49.8 51.8 53.7 55.6 57.6 21 42.3 44.2 46.1 48.0 50.0 51.9 53.8 55.7 57.7 --------------------------------------------------------------------------- Source: Adapted from Boggs, South Dakota State University, 1991 Greater mature cow weight is associated with increased frame scores, which results in additional feed required for maintenance because of a larger body mass. Stocking rates and quantities of feed need to be adjusted to meet the demands of larger cows. Provided necessary feed is available, larger cows generally meet their higher requirements. Under favorable management, reproductive rates tend to be similar across frame size; however, when the availability of feed becomes restricted, larger framed cattle are more susceptible to reproductive failure. Increasing mature size is a concern and may require adjusting replacement heifer development programs in order to insure they reach heavier prebreeding weights necessary to attain puberty. Large frame size is also associated with greater growth potential, longer finishing periods, and heavier slaughter weights. The generally preferred range for carcass weights of 650 to 850 pounds suggests the need to produce feeder cattle with a 5 to 7 range in frame scores. The current USDA feeder cattle grading system is based on the factors of frame size and muscle thickness. Three frame score designations are included: large, medium, and small, which relate to an evaluation by appearance of an animal's skeletal height in relation to its age and the weight at which an animal will produce a choice quality carcass with about .5 inches external fat at the 12th rib. Large frame steers and heifers would not be expected to produce choice carcasses until their live weight exceeds 1200 and 1000 pounds, respectively. Medium frame steers would be expected to produce choice carcasses at live weights of 1000 to 1200 pounds, and heifers at 850 to 1000 pounds. Small frame steers and heifers would produce choice carcasses at live weights of less than 1000 and 850 pounds, respectively. An indication of frame size is very important when estimating growing and finishing cattle nutrient requirements and projected feed intake. Although larger framed cattle will generally have increased intakes, energy concentration in the feed that is used for gain (NEg) is lower than that of medium framed cattle. Furthermore, protein requirements for large framed steers have been based on medium framed steers that weigh 15% less. This results in a greater protein requirement for large compared to medium framed cattle. Frame score is considered to be moderately to highly heritable. As such, frame score can be significantly changed through selection, primarily achieved through sire selection. With an heritability estimate of .40, about 40% of a bull's difference in frame score from herd average will be passed on to progeny. Frame score measurements are descriptive of animal type and growth patterns in beef cattle. They are useful in evaluating animal nutritional requirements, characterizing target market weights, and aid in selection decisions. [/QUOTE]
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