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1999

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Articles 301 - 330 of 658

Full-Text Articles in Animal Sciences

Ontogenetic Habitat Shifts Of Juvenile Bear Lake Sculpin, J. Ruzycki, Wayne A. Wurtsbaugh Jan 1999

Ontogenetic Habitat Shifts Of Juvenile Bear Lake Sculpin, J. Ruzycki, Wayne A. Wurtsbaugh

Watershed Sciences Faculty Publications

Bear lake sculpin Cottus extensus exhibit ontogenetic habitat shifts during their initial year of life. Distribution and habitat switching was measured with bimonthly bottom-trawl surveys repeated throughout the summer. Patterns of daily growth increments on otoliths were used to measure the history of habitat residence, individual size at the time of the habitat switch, and habitat-specific growth rates. Laboratory experiments and known-age fish confirmed daily increment formation of otoliths. After dispersing during an initial pelagic larval stage, postlarval juveniles settled in both the warm, food-rich littoral zone and the cold, unproductive profundal zone. During summer, initial profundal-zone inhabitants underwent a …

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Species And Subspecies Of The Genus Aphanius Nardo 1897 (Pisces: Cyprinodontidae) In Turkey, Rudolf H. Wi̇ldekamp, Fahretti̇n Küçük, Mustafa Ünlüsayin, Wi̇m Van Neer Jan 1999

Species And Subspecies Of The Genus Aphanius Nardo 1897 (Pisces: Cyprinodontidae) In Turkey, Rudolf H. Wi̇ldekamp, Fahretti̇n Küçük, Mustafa Ünlüsayin, Wi̇m Van Neer

Turkish Journal of Zoology

The Turkish species of the Cyprinodontiform genus Aphanius Nardo 1827 are described. The naming used follows Wildekamp (1993) (1) as the latest available revision. Information is given on morphology, sexual dimorphism, colouration and distribution, as well as remarks on taxonomy, nomenclature, distribution, variability and conservation. Comments are given on the Lazara (1995) (2) revalidation of Lebias as a distinct genus. It is shown that Valenciennes (1846) (3) is the first revisor of Lebias, and not Lazara, and that Aphanius should be maintained as a genus. The taxon Aphanius chantrei (Galliard 1895) is regarded as a junior synonym of Aphanius danfordii …

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The First Record Of Epistylis Niagaraeon Astacus Leptodactylusin A Crayfish Rearing Unit, Cip, Muzaffer Mustafa Harlioğlu Jan 1999

The First Record Of Epistylis Niagaraeon Astacus Leptodactylusin A Crayfish Rearing Unit, Cip, Muzaffer Mustafa Harlioğlu

Turkish Journal of Zoology

In this study, the presence of the ectocommensal Epistylis niagarae on the carapace, abdomen, walking legs, uropod, telson, antennae and antennulae of crayfish was observed.

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The Arctic And Antarctic: An Integrated Curriculum Unit, Grades K-2, Institute For The Development Of Gifted Education, Ricks Center For Gifted Children, University Of Denver Jan 1999

The Arctic And Antarctic: An Integrated Curriculum Unit, Grades K-2, Institute For The Development Of Gifted Education, Ricks Center For Gifted Children, University Of Denver

Ricks Curriculum Units Series

An integrated curriculum is an instructional approach that connects the disciplines to an underlying theme or topic. Immersing students in an integrated-thematic unit provides the backdrop for experiences to occur across the disciplines. Shaping coursework around integrated themes is especially appropriate for gifted students, however using an integrated-thematic curriculum is appropriate for all learners as it develops students' abilities to make connections, to solve problems by looking at multiple perspectives, and to integrate information from different fields of experience. An integrated-thematic curriculum permits students to be active participants in their own learning as they design their own explorations and take …

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Optimal Conditions Of Cooler Aging For Beef, Chris R. Calkins, Rosemarie Rosario Jan 1999

Optimal Conditions Of Cooler Aging For Beef, Chris R. Calkins, Rosemarie Rosario

Nebraska Beef Cattle Reports

Steaks from longissimus muscle were stored at 30°F and 38°F for one, two, three, eight and 15 days postmortem to identify time/temperature combinations providing optimum tenderization. After completion of each treatment, steaks were sampled for myfibrillar protein degradation using gel electrophoresis and Warner-Bratzler shear force. Steaks aged at 38°F tended to have lower shear force values (greater tenderness) and shorter storage times than those stored at 30°F. Gel electrophoresis confirmed these results: samples stored at 38° F had considerable protein degradation in eight days, comparable to steaks aged at 30°F for 15 days.

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1999 Nebraska Beef Cattle Reports Jan 1999

1999 Nebraska Beef Cattle Reports

Nebraska Beef Cattle Reports

Acknowledgments

Cow/Calf: Effects of Time of Weaning on Cow and Calf Performance • Summer Grazing Date and Fall Grazing Intensity Effects on Protein Content and Digestibility of Fall Diets in the Nebraska Sandhills • Climate Affects Calf Birth Weights and Calving Difficulty • Trace Mineral Supplementation and Ovarian and Luteal Function in Pubertal Heifers • Progesterone Metabolism by the Liver and Brain During the Estrous Cycle of Heifers

Growing: Cysteine from Feather Meal and Sulfur Amino Acid Requirements for Growing Steers • Hog Hair Meal as a Protein Source for Ruminants • Pork Meat and Bone Meal Value Relative to …

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Use Of Neutral Detergent Insoluble Protein In Omasal Samples To Estimate Escape Protein, Abdullah Can, Terry J. Klopfenstein, Ryan Mass Jan 1999

Use Of Neutral Detergent Insoluble Protein In Omasal Samples To Estimate Escape Protein, Abdullah Can, Terry J. Klopfenstein, Ryan Mass

Nebraska Beef Cattle Reports

Three experiments were conducted with ruminally cannulated steers to evaluate neutral detergent insoluble protein (NDIP) content of omasal samples as an escape protein estimation technique. In experiment 1, brome hay escape protein (EP) values were determined with the NDIP technique and the omasal sampling purine technique (OSPT) with no difference in EP values. In experiment 2, smooth bromegrass EP values were estimated in June and August, 1996. In situ and OSPT estimated similar EP values, but EP estimates from NDIP were lower. Experiment 3 was conducted from May through July, 1997. OSPT estimated the highest EP values. In experiments 2 …

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Climate Affects Calf Birth Weights And Calving Difficulty, Gene H. Deutscher, Dave Colburn, Rex Davis Jan 1999

Climate Affects Calf Birth Weights And Calving Difficulty, Gene H. Deutscher, Dave Colburn, Rex Davis

Nebraska Beef Cattle Reports

A six-year study was conducted to investigate effects of winter temperatures on two-year-old cows (n=285) and their subsequent calf birth weights and calving difficulty in the spring. The winter of 1992-93 (coldest) was 11° F colder than the winter of 1994-95 (warmest). The coldest winter was followed by calf birth weights that were 11 pounds heavier with 29 percent greater calving difficulty compared to the warmest winter. Our results indicated that as average winter temperatures decreased 1° F, subsequent calf birth weights increased 1 pound and calving difficulties increased 2.6 percentage points. When blankets were placed on cows before calving, …

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Effects Of Matching Protein To Requirements On Performance And Waste Management In The Feedlot, Galen E. Erickson, Terry J. Klopfenstein, Todd Milton, Dan Herold Jan 1999

Effects Of Matching Protein To Requirements On Performance And Waste Management In The Feedlot, Galen E. Erickson, Terry J. Klopfenstein, Todd Milton, Dan Herold

Nebraska Beef Cattle Reports

Four experiments were conducted, two with calves in the winter/spring and two with yearlings during the summer, to evaluate the effects of decreasing protein levels on nutrient balance in the feedlot. The control diet was formulated for 13.5 percent protein; the experimental diets were formulated using the 1996 NRC model to predict protein requirements. Nutrient balances for organic matter (OM) and nitrogen (N) were measured. Nitrogen intake and subsequent excretion were decreased with steers fed the experimental treatment. During the summer more N was removed from pens on the experimental treatment since OM excretion was greater which led to decreased …

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Effects Of Rumensin Level And Bunk Management Strategy On Finishing Steers, Ki Fanning, Todd Milton, Terry J. Klopfenstein, D. J. Jordon, Rob Cooper, Cal Parrott Jan 1999

Effects Of Rumensin Level And Bunk Management Strategy On Finishing Steers, Ki Fanning, Todd Milton, Terry J. Klopfenstein, D. J. Jordon, Rob Cooper, Cal Parrott

Nebraska Beef Cattle Reports

Eight ruminally fistulated, yearling steers (two concurrent 4x4 Latin squares) were used to evaluate dietary Rumensin level (0, 30, 30/40 or 40 g/t), and bunk management strategy (ad libitum or clean bunk: 24- or 14-hour feed access). Rumensin decreased meal size and increased meal frequency without compromising intake. Clean bunk management increased consumption rate, meal size and ruminal pH change and pH variance. Steers with limited feed exposure are at greater risk for subacute acidosis; Rumensin effects consumption favorably for controlling acidosis, especially for cattle with limited feed exposure.

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The Relationship Of Beef Primal Cut Composition To Overall Carcass Composition, Dana Hanson, Chris R. Calkins, Bucky Gwartney, John Forrest, Ron Lemenager Jan 1999

The Relationship Of Beef Primal Cut Composition To Overall Carcass Composition, Dana Hanson, Chris R. Calkins, Bucky Gwartney, John Forrest, Ron Lemenager

Nebraska Beef Cattle Reports

The amount of lean, subcutaneous fat, seam fat and bone of each of the four major primal cuts (round, rib, loin and chuck) were used in combination with yield grade to predict total side composition. The makeup of each primal is highly related to total carcass composition The decision of which primal to fabricate depends on the sex of the animal and which component (lean, subcutaneous fat, seam fat or bone) is of greatest interest.

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Corn Bran, Solvent-Extracted Germ Meal, And Steep Liquor Blends For Finishing Yearlings, Daniel Herold, Rob Cooper, Terry J. Klopfenstein, Todd Milton, Rick Stock Jan 1999

Corn Bran, Solvent-Extracted Germ Meal, And Steep Liquor Blends For Finishing Yearlings, Daniel Herold, Rob Cooper, Terry J. Klopfenstein, Todd Milton, Rick Stock

Nebraska Beef Cattle Reports

Finishing performance of yearling steers was used to assess eight treatments containing corn wet milling byproducts. Interactions were encountered for dry matter intake, average daily gain and feed efficiency as level of dietary steep liquor/distillers solubles increased and corn bran and(or) corn bran with solvent- extracted germ meal decreased. Average daily gain and feed efficiency increased as steep liquor/distillers solubles replaced corn bran or a combination of corn bran and solvent-extracted germ meal. Steep liquor with distillers solubles had higher feeding value than corn bran or solvent-extracted germ meal and solvent-extracted germ meal had 19.9 percent higher energy than corn …

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Hormonal Influence On Fat Synthesis In Cattle, Sheila Jacobi, Jess L. Miner Jan 1999

Hormonal Influence On Fat Synthesis In Cattle, Sheila Jacobi, Jess L. Miner

Nebraska Beef Cattle Reports

The ability of adenosine, insulin and human acylation-stimulating protein to modify fat synthesis was determined using cultures of fat tissue from steers. Adenosine did not influence fat synthesis. However, acylation stimulating protein and insulin promoted fat synthesis. These observations, coupled with knowledge of how fat synthesis is regulated in other species, justify investigation of whether cattle synthesize acylation-stimulating protein, and how this synthesis is regulated. An understanding of how acylation-stimulating protein production and action is regulated should expose potential places for intervention to manipulate fat synthesis in cattle.

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Evaluation Of Growth-Promoting Systems For Heifer Calves Finished In The Feedlot, Mari Lubberstedt, Terry L. Mader, Jill Heemstra, Kelly Letchenberg Jan 1999

Evaluation Of Growth-Promoting Systems For Heifer Calves Finished In The Feedlot, Mari Lubberstedt, Terry L. Mader, Jill Heemstra, Kelly Letchenberg

Nebraska Beef Cattle Reports

Two-hundred ten head of predominantly British and/or British x Continental cross heifers were assigned to six implant/reimplant treatment groups (five pens/treatment). In addition, melengestrol acetate (MGA) was provided to four treatment groups from day 28 until 48 hours prior to slaughter. Heifers not fed MGA had the greatest number of immature ovaries, although they were also the most efficient in feed conversion (lower feed to gain ratio). Heifers fed MGA and implanted with Finaplix were the least efficient in feed conversion

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Hog Hair Meal As A Protein Source For Ruminants, Amie Mass, Ryan Mass, Terry J. Klopfenstein, D. J. Jordon Jan 1999

Hog Hair Meal As A Protein Source For Ruminants, Amie Mass, Ryan Mass, Terry J. Klopfenstein, D. J. Jordon

Nebraska Beef Cattle Reports

A cattle growth trial, two lamb digestion trials and a lamb growth trial evaluated hog hair meal as a protein source for ruminants. Although no differences in protein efficiency were found in the cattle trial, hair meal tended to be lower in protein efficiency than feather meal and soybean meal and true nitrogen digestibility of hair meal was lower than both feather meal and soybean meal. Treatments of additional steam pressure and hydrolysis time were applied to raw hog hair. True nitrogen digestibility increased as hydrolysis time and steam pressure increased. Metabolizable protein supplied by hair meal was increased by …

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Protein Evaluation Of Treated Soybean Meal Products, Ryan Mass, D. J. Jordon, Terry J. Klopfenstein Jan 1999

Protein Evaluation Of Treated Soybean Meal Products, Ryan Mass, D. J. Jordon, Terry J. Klopfenstein

Nebraska Beef Cattle Reports

Three treated soybean meal (SBM) products: 1) nonenzymatically browned SBM (SoyPass®); 2)expeller SBM (SoyPlus®); and 3) a product of an unpublished manufacturing process (AminoPlus®), were compared using the following measurements: undegraded intake protein concentration (UIP), true nitrogen digestibility (TND) and metabolizable protein (MP) concentration. Soy Pass had the highest UIP, TND and MP values of the three treated SBM, followed by AminoPlus and then SoyPlus. The degree of heating may explain the differences in the three treated SBM products.

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Effects On Protein Content And Digestibility Of Fall Diets In The Nebraska Sandhills, Trey Patterson, Terry J. Klopfenstein, Don C. Adams, Walter H. Schacht, Patrick E. Reece, Jacqueline A. Musgrave, Amy Johnson Jan 1999

Effects On Protein Content And Digestibility Of Fall Diets In The Nebraska Sandhills, Trey Patterson, Terry J. Klopfenstein, Don C. Adams, Walter H. Schacht, Patrick E. Reece, Jacqueline A. Musgrave, Amy Johnson

Nebraska Beef Cattle Reports

Four blocks of Sandhills rangeland (three pastures/block) were used to test summer grazing date and fall grazing intensity effects on protein content and digestibility of fall diets. Summer treatments applied to each block were 1) no summer grazing, 2) June grazing and 3) July grazing. Each block was grazed in sequence at six different stocking rates the following fall by six esophageally fistulated cows (two per pasture). Digestibility of fall diets declined linearly and crude protein declined quadratically as fall stocking intensity progressively increased. June grazing increased the CP content of fall diets compared to July or no summer grazing, …

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Progesterone Metabolism By The Liver And Brain During The Estrous Cycle Of Heifers, Jorge Quintal-Franco, Hector Jimenez-Severiano, Eraldo Zanella, Michael Wehrman, Brad Lindsey, Eric Melvin, Jim Kinder Jan 1999

Progesterone Metabolism By The Liver And Brain During The Estrous Cycle Of Heifers, Jorge Quintal-Franco, Hector Jimenez-Severiano, Eraldo Zanella, Michael Wehrman, Brad Lindsey, Eric Melvin, Jim Kinder

Nebraska Beef Cattle Reports

Heifers were used to evaluate progesterone metabolism in the liver and brain during the estrous cycle. Blood samples were collected from the carotid artery and jugular, portal and hepatic veins. Progesterone concentrations in the hepatic vein were less than in portal and jugular veins and the carotid artery, but there were no differences between the carotid artery and jugular and portal veins. Progesterone concentrations in the hepatic, portal and jugular veins represented 25, 89 and 86 percent of concentrations in the carotid artery, respectively. During the estrous cycle much of the progesterone in blood is metabolized by the liver.

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N-Alkane As An Internal Market For Predicting Digestibility Of Forages, Russell Sandberg, Don C. Adams, Terry J. Klopfenstein, Rick Grant Jan 1999

N-Alkane As An Internal Market For Predicting Digestibility Of Forages, Russell Sandberg, Don C. Adams, Terry J. Klopfenstein, Rick Grant

Nebraska Beef Cattle Reports

Independent digestion trials were conducted with three immature grasses, mature grass hay, and alfalfa hay to compare n-alkane with indigestible ADF (IADF) as internal markers to predict in vivo dry matter digestibility (DMD). Forage DMD estimated with n-alkane ratios were lower than in vivo DMD. N-alkanes predicted higher DMD than IADF for alfalfa hay and two of the immature grasses. Comparison of freeze-drying and oven-drying on fecal n-alkane concentrations showed oven drying reduced amounts of n-alkane extracted for alfalfa hay but had no effect on grass hay. Although fecal recovery of markers was incomplete, more n-alkane was recovered than IADF.

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Effects Of Programmed Gain On Performance And Carcass Characteristics In Calves, Rob Cooper, Tony Scott, Todd Milton, Terry L. Mader, Terry J. Klopfenstein Jan 1999

Effects Of Programmed Gain On Performance And Carcass Characteristics In Calves, Rob Cooper, Tony Scott, Todd Milton, Terry L. Mader, Terry J. Klopfenstein

Nebraska Beef Cattle Reports

One hundred sixty crossbred steer calves were used to evaluate the efficacy of including a programmed gain phase in the feeding program and to evaluate effects of rate and duration of programmed gain on finishing performance. Including a multiple phase programmed gain period with two rates of gain resulted in performance similar to a single period of programmed gain. Increasing length of the programmed gain period resulted in higher gains and dry matter intakes after steers were switched to ad libitum feeding. Cumulative daily gain and dry matter intake were decreased by the programmed feeding strategies. Net return per animal …

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Effects Of Time Of Weaning On Cow And Calf Performance, Chuck Story, Richard J. Rasby, Todd Milton, Mark Dragastin Jan 1999

Effects Of Time Of Weaning On Cow And Calf Performance, Chuck Story, Richard J. Rasby, Todd Milton, Mark Dragastin

Nebraska Beef Cattle Reports

Research investigating the effects of weaning calves at three different ages was conducted over four years at the Dalbey-Halleck Farm. Each year 180 spring calving cows had their calves weaned at 150 days of age, (n=60); 210 days of age, (n=60); or 270 days of age, (n=60). Weaning at 150 days resulted in greater cow weight and body condition. Pregnancy rate was similar among groups. Early weaned calves were fed a finishing ration longer, which resulted in heavier carcasses and a greater percentage grading at least Choice. Early weaning can be used to improve cow condition at calving.

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Trace Mineral Supplementation And Ovarian And Luteal Function In Pubertal Heifers, Chuck Story, Richard J. Rasby, Dennis R. Brink, Jim Kinder, Tony Moravek Jan 1999

Trace Mineral Supplementation And Ovarian And Luteal Function In Pubertal Heifers, Chuck Story, Richard J. Rasby, Dennis R. Brink, Jim Kinder, Tony Moravek

Nebraska Beef Cattle Reports

Crossbred heifers (n=19) were used to determine the effects of feeding Cu, Co, Mn and Zn in amounts greater than recommended by the NRC on ovarian function. Heifers were fed hay ad libitum and individually fed a control (n=9) or trace mineral (n=10) supplement for 109 days. Dry-matter intake, average daily gain, day luteal phase began, length of luteal phase, daily mean progesterone production, follicular phase estradiol production and first wave dominant follicle size were not affected by mineral supplementation. However, heifers in the treatment group had fewer large follicles during the early portion of the estrous cycle.

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Crude Protein And Energy Combinations For Finishing Yearling Steers, Burt Weichenthal, Ivan G. Rush, Brad Van Pelt Jan 1999

Crude Protein And Energy Combinations For Finishing Yearling Steers, Burt Weichenthal, Ivan G. Rush, Brad Van Pelt

Nebraska Beef Cattle Reports

Yearling Angus steers averaging 889 pounds were fed 12.1 or 13.8 percent crude protein with two energy levels during the first half of finishing, followed by 12.3 or 13.8 percent crude protein with the higher energy level during the second half of finishing. In a 126-day trial, finishing performance and carcass traits were not improved by feeding more than 12.1 percent crude protein or more than 56 Mcal/cwt NEg during the first half of finishing or more than 12.3 percent crude protein in the second half. These rseults indicate increased corn silage levels during the first half of finishing …

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Africa: An Integrated Curriculum Unit, Grades 2-4, Institute For The Development Of Gifted Education, Ricks Center For Gifted Children, University Of Denver Jan 1999

Africa: An Integrated Curriculum Unit, Grades 2-4, Institute For The Development Of Gifted Education, Ricks Center For Gifted Children, University Of Denver

Ricks Curriculum Units Series

An integrated curriculum is an instructional approach that connects the disciplines to an underlying theme or topic. Immersing students in an integrated-thematic unit provides the backdrop for experiences to occur across the disciplines. Shaping coursework around integrated themes is especially appropriate for gifted students, however using an integrated-thematic curriculum is appropriate for all learners as it develops students' abilities to make connections, to solve problems by looking at multiple perspectives, and to integrate information from different fields of experience. An integrated-thematic curriculum permits students to be active participants in their own learning as they design their own explorations and take …

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Animal Science Alumni Newsletter, Winter 1999 Jan 1999

Animal Science Alumni Newsletter, Winter 1999

Department of Animal Science: Departmental News

Contents:

From the Department Head's Desk
Graduate Program
Bud Britton Animal Science Golf Classic
Undergraduate Program
Death
Animal Science Open House
Academic Quadrathlon Held
Emeriti Addresses
Block & Bridle Activities
Past Honorees at Block and Bridle Banquet
Officers for Fall 1999
Activities for 1999-00
Recent Department Awards and Recognitions
Judging Team Activities
Staff
Your Newsletter Committee
Alumni News
Animal Science Newsletter Nationally Recognized
Animal Science Department Web Site
Calendar of Events for 1999 – 2000

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Evaluation Of Nitrogen And Organic Matter Balance In The Feedlot As Affected By Level And Source Of Dietary Fiber, S. Bierman, Galen Erickson, Terry Klopfenstein, Rick A. Stock, D. H. Shain Jan 1999

Evaluation Of Nitrogen And Organic Matter Balance In The Feedlot As Affected By Level And Source Of Dietary Fiber, S. Bierman, Galen Erickson, Terry Klopfenstein, Rick A. Stock, D. H. Shain

Department of Animal Science: Faculty Publications

A trial was conducted to determine the effect of level and source of dietary fiber on N and OM excretion by cattle on finishing diets. One hundred twenty steers were stratified by weight and allotted to one of the following treatments: 7.5% roughage (7.5% R), wet corn gluten feed (WCGF; 41.5% of dietary DM), and all-concentrate (All Con) diet. Cattle were fed for 87 d during the summer with 23.7 m2 of pen area per animal. Steers fed the WCGF diet had heavier final weights, greater DMI, and higher ADG ( P < .01) than the 7.5% R and All Con treatments. Steers fed All Con had lower ( P < .01) DMI than the other two treatments. Nitrogen and OM mass balances in the feedlot were quantified. Main components were nutrient input, retention, and excretion. Nitrogen and OM intake of steers fed WCGF were greater ( P < .05) than those of steers fed the other treatments. The WCGF treatment had a greater percentage of fecal N output ( P < .05). The All Con treatment had a greater ( P < .01) percentage of urinary N than WCGF and 7.5% R diets. Steers fed the WCGF treatment excreted more ( P < .01) OM compared with the other treatments, which led to more N and OM being removed in manure at cleaning. The All Con treatment had more ( P < .01) N and OM in runoff than the other treatments. Nutrition can change site of fermentation, which affects the composition of excreted material; however, total amount of N excreted may be more important than route of excretion in decreasing N losses to the environment and maximizing recovery in manure.

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Effect Of Dietary Phosphorus On Finishing Steer Performance, Bone Status, And Carcass Maturity, Galen Erickson, Terry Klopfenstein, C. T. Milton, D. Hanson, Chris Calkins Jan 1999

Effect Of Dietary Phosphorus On Finishing Steer Performance, Bone Status, And Carcass Maturity, Galen Erickson, Terry Klopfenstein, C. T. Milton, D. Hanson, Chris Calkins

Department of Animal Science: Faculty Publications

Yearling crossbred steers (n = 60; 386 kg) were individually fed in a completely randomized experimental design to determine their P requirement. Treatments were in a factorial arrangement with two levels of Ca (.35 or .70% of DM) and five concentrations of P (.14, .19, .24, .29, or .34% of DM). The finishing diet consisted of 34.5% dry-rolled corn, 22.5% brewers grits, 22.5% corn bran, 7.5% ground corncobs, 5% molasses, 3% fat, and 5% supplement. Supplemental P was provided as monosodium phosphate and Ca as limestone. Ash content was determined on the first phalanx bone from the lower front legs …

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Evaluation Of The Ovine Callipyge Locus: Iii. Genotypic Effects On Meat Quality Traits, B. A. Freking, J. W. Keele, S. D. Shackelford, T. L. Wheeler, M. Koohmarai, Merlyn K. Nielsen, Kreg A. Leymaster Jan 1999

Evaluation Of The Ovine Callipyge Locus: Iii. Genotypic Effects On Meat Quality Traits, B. A. Freking, J. W. Keele, S. D. Shackelford, T. L. Wheeler, M. Koohmarai, Merlyn K. Nielsen, Kreg A. Leymaster

Department of Animal Science: Faculty Publications

A resource flock of 362 F2 lambs provided phenotypic and genotypic data to estimate effects of callipyge ( CLPG) genotypes (NN, NC, CN, and CC) on meat quality traits. The mutant allele is represented as C, the normal allele(s) as N, and the paternal allele of a genotype is given first. Lambs of each genotype born in 1994 and 1995 were serially slaughtered in six groups at 3-wk intervals starting at 23 wk of age. Warner-Bratzler shear force and subjective evaluation of marbling were collected during both years from longissimus. Calpastatin activity was measured on longissimus from the 1994 …

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The Effect Of Forage Source And Particle Size On Finishing Yearling Steer Performance And Ruminal Metabolism, D. H. Shain, Rick Stock, Terry J. Klopfenstein, D. W. Herold Jan 1999

The Effect Of Forage Source And Particle Size On Finishing Yearling Steer Performance And Ruminal Metabolism, D. H. Shain, Rick Stock, Terry J. Klopfenstein, D. W. Herold

Department of Animal Science: Faculty Publications

Two finishing trials and a metabolism trial were conducted to evaluate the effect of forage source and particle size in dry-rolled corn finishing diets. In Exp. 1, 224 crossbred yearling steers (BW = 342 ± 11 kg) were used in a randomized complete block design consisting of seven treatments. Treatments were an all-concentrate diet or diets containing equal NDF levels provided by alfalfa hay or wheat straw (three treatments each) with each forage source ground to pass through a .95-, 7.6-, or 12.7-cm screen. Steers fed diets containing forage had greater ( P < .05) DMI than steers fed an all concentrate diet. Steers fed alfalfa diets gained faster ( P < .05) with a greater ( P < .05) concentrate efficiency than steers fed either all-concentrate or straw diets. In Exp. 2, 120 crossbred yearling steers (BW = 307 ± 2 kg) were used in a completely randomized design and fed dry-rolled corn diets containing 10% alfalfa ground to pass through either a .95- or 7.6-cm screen. Alfalfa particle size had no effect on performance or carcass measurements. In Exp. 3, six ruminally fistulated steers (BW = 508 ± 34 kg) were used in a 6 x 6 Latin square design and fed an all-concentrate diet or diets containing equal NDF levels provided by alfalfa hay, wheat straw, or ground corncobs with alfalfa and straw ground to pass through either a 2.54- or 12.7-cm screen. Steers fed straw diets spent more time ( P < .10) chewing than those receiving the other diets. In conclusion, forage particle size had no effect on finishing cattle performance or ruminal metabolism data. However, cattle consuming different forage sources in dry-rolled corn finishing diets may not respond similarly in animal performance.

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Predicting Amount Of Compensatory Gain, Terry J. Klopfenstein, D. J. Jordon, Ivan G. Rush, Todd Milton Jan 1999

Predicting Amount Of Compensatory Gain, Terry J. Klopfenstein, D. J. Jordon, Ivan G. Rush, Todd Milton

Nebraska Beef Cattle Reports

In North American beef production systems, the entire spectrum of restriction and compensation is found. The area of compensatory gain is complex and not well understood, but critically important to the economics of cattle feeding. Several compensatory gain studies from the University of Nebraska have been compiled. The range in compensation observed with cattle grazing season-long is 19-88 percent with a mean of 53 percent. From these grazing studies, days of restriction appear to be related to percentage compensation. In the feedlot, even relatively short restrictions trigger compensatory gain; however, feed efficiency response to compensatory gain is

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