Provision of a protein-rich supplement for grazing suckling female beef calves to improve productive performance and metabolic response

This study assessed the effects of different amounts of supplement on the productive performance, nutrional caracteristics and behaviour of suckling beef calves, as well as on the productive performance of their dams on tropical pastures. Forty-four male Nellore beef calves with an average age of 120 days and an initial average body weight (BW) of 145±3.7 kg and their respective dams, with an average BW of 449±6.9 kg, were used. The amounts of supplement evaluated were as follows: 0 = calves received only mineral mixture ad libitum; 3, 6, and 9 = calves received 3, 6, or 9 g kg-1 BW of supplement, respectively, containing 250 g CP kg-1 (as-fed). The experimental design was completely randomized. A positive linear effect (P < 0.01) was observed in the intakes of dry matter and organic matter, and a cubic effect (P < 0.07) was observed for the intake of neutral detergent fiber corrected for ash and protein. There was quadratic effect (P < 0.06) for total digestibility of neutral detergent fiber. A cubic effect (P < 0.01) was observed for the calves’ performance. However, the calves’ supplementation did not affect the milk yield and performance (P ? 0.21) of their dams. The supplementation decreased grazing time (P < 0.01) but did not influence suckling time (P ? 0.59). It is recommended supplying of supplement containing 250 g CP kg-1 (as-fed) in amount 6 g kg-1 BW to suckling beef calves managed in tropical pasture. Supplementation of suckling beef calves increases the intake of dry matter, decreases grazing time and forage intake. However, it does not affect the suckling time and productive performance of their dams.

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Effects of feeding baleage to beef calves on performance, rumen fermentation, and metabolic response during the fall backgrounding period

The Professional Animal Scientist ◽

10.15232/pas.2015-01402 ◽

2015 ◽

Vol 31 (4) ◽

pp. 324-332 ◽

Cited By ~ 1

Author(s):

R.M. Martin ◽

R.S. Walker ◽

M.T. Kearney ◽

C.C. Williams

Keyword(s):

Metabolic Response ◽

Rumen Fermentation ◽

Beef Calves

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Serologic profiles for Sarcocystis sp. and Neospora caninum and productive performance in naturally infected beef calves

Parasitology Research ◽

10.1007/s00436-010-1721-5 ◽

2010 ◽

Vol 106 (3) ◽

pp. 689-693 ◽

Cited By ~ 9

Author(s):

Gastón Moré ◽

Diana Bacigalupe ◽

Walter Basso ◽

Magdalena Rambeaud ◽

Maria C. Venturini ◽

...

Keyword(s):

Neospora Caninum ◽

Productive Performance ◽

Beef Calves

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PRODUCTIVE PERFORMANCE OF PRE-WEANED CALVES REARED IN THE PANTANAL

Ciência Animal Brasileira ◽

10.1590/1809-6891v20e-51187 ◽

2019 ◽

Vol 20 ◽

Cited By ~ 1

Author(s):

Luiz Orcirio Fialho de Oliveira ◽

Urbano Gomes Pinto de Abreu ◽

Rodrigo da Costa Gomes ◽

Ériklis Nogueira ◽

Juliana Correa Borges Silva ◽

...

Keyword(s):

Live Weight ◽

High Energy ◽

Low Energy ◽

Productive Performance ◽

Early Weaning ◽

Cattle Breeding ◽

Beef Calves ◽

Genetic Groups ◽

Breeding Farms ◽

Low Energy Diet

Abstract Early weaning (EW) has been adopted in cattle breeding farms in Pantanal as a strategy to increase the rate of pregnancy in cows. The primary income of these properties is the production of beef calves, and the price of these animals depends on their weight. Therefore, the calves subjected to EW should present weight similar to or higher than those of calves subjected to conventional weaning (CW). This study aimed to evaluate the productive performance of pure (Nellore) calves and crossbred (Nellore/Angus) calves reared in the Pantanal and subjected to either EW or CW. After EW, the calves were supplemented with concentrate at 1 kg/animal/day (low-energy diet) or 1% of live weight (high-energy diet). The weights adjusted to 300 days of age were higher for EW calves fed the high-energy diet (p<0.01) in both genetic groups. No significant differences were observed in the weight of EW animals fed the low-energy diet and CW animals (p>0.01), and animal weight was 241.17 and 236.27 kg in crossbred calves and 184.44 and 189.78 in Nellore calves, respectively. The EW adopted in this experimental model did not affect the productive performance of calves raised in the Pantanal.

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ВЫСОКОПРОТЕИНОВАЯ РЫБНАЯ МУКА В КОМБИКОРМАХ ДЛЯ ЦЫПЛЯТ-БРОЙЛЕРОВ

10.33845/0033-3239-2021-70-1-17-21 ◽

2021 ◽

Vol 70 (1) ◽

Keyword(s):

Amino Acids ◽

Meat Quality ◽

Crude Protein ◽

Nutritive Value ◽

Negative Impact ◽

Conversion Ratio ◽

Feed Conversion Ratio ◽

Productive Performance ◽

Feed Conversion ◽

Protein Rich

Егоров И.А., Егорова Т.В., Шевяков А.Н., Клейнерман Ю.Е КЛЮЧЕВЫЕ СЛОВА: РЫБНАЯ МУКА, ЦЫПЛЯТА-БРОЙЛЕРЫ, АМИНОКИСЛОТЫ, ЗООТЕХНИЧЕСКИЕ ПОКАЗАТЕЛИ, ИСПОЛЬЗОВАНИЕ ПИТАТЕЛЬНЫХ ВЕЩЕСТВ, КОНВЕРСИЯ КОРМА, КАЧЕСТВО МЯСА АННОТАЦИЯ: Исследования выполняли на 2 группах бройлеров селекции СГЦ «Смена» с 1- до 35-суточного возраста, при клеточном содержании птицы. Контрольная группа бройлеров получала полнорационный комбикорм растительного типа, сбалансированный по всем питательным веществам, а опытная - полнорационный комбикорм аналогичной питательности с включением изучаемой рыбной муки в количестве 5% до 21 суток и 3% - с 22 до 28 суток. С 29 суток рыбная мука исключалась из рациона. Рыбная мука содержала 3,66% влаги, 76,70% сырого протеина, 7,97% сырого жира. При этом содержание кальция составило 4,51% , фосфора - 2,62%, натрия - 1,10%; уровень лизина составлял 7,09%, а метионина + цистина - 3,36%. Живая масса бройлеров в возрасте 35 суток в опытной группе достоверно повысилась на 7,54% (р<0,001), а конверсия корма снизилась на 6,84%. Рыбная мука не оказала существенного негативного влияния на вкусовые качества мяса; содержание сырого протеина в грудных мышцах в опытной группе было на 3,35% выше, сырого жира - на 1,09% ниже, чем в контроле. Сделан вывод, что ввод высокопротеиновой рыбной муки в комбикорма позволяет получить хорошую сохранность, живую массу и приросты живой массы бройлеров за счет лучшего использования питательных веществ, причем улучшение продуктивности и меньшее использование синтетических аминокислот полностью окупает затраты на рыбную муку. PROTEIN-RICH FISHMEAL IN COMPOUND FEEDS FOR BROILERS EGOROV I.A.1, EGOROVA T.V.1, SHEVYAKOV A.N.1, KLEINERMAN YU.E.2 1 Federal Scientific Center “All-Russian Research and Technological Institute of Poultry” of Russian Academy of Sciences 2 Vetsnab, LCC The chemical composition of protein-rich fishmeal (produced by Vetsnab, LCC ) and its efficiency as protein additive for broilers were studied. The fishmeal contained (%): moisture 3.66; crude protein 76.70; crude fat 7.97; calcium 4.51; phosphorus 2.62; sodium 1.10; lysine 7.09; methionine+cystine 3.36. Two treatments of broilers (cross Smena-9, 1-35 days of age, 70 birds per treatment) were fed similar vegetable diets with equal nutritive value and reared in similar management conditions; in the experimental diets soybean meal was partially substituted by fishmeal at the levels 5% of total diet since 1 to 21 days of age and 3% since 22 to 28 days; since 29 days the treatments were fed similar vegetable finisher diets. Live bodyweight at 35 days of age in the experimental treatment was significantly higher by 7.54% in compare to control (p<0.001), feed conversion ratio lower by 6.84%. Sensory evaluation of breast and thigh meat evidenced the absence of negative impact of the fishmeal on the taste; concentration of crude protein in breast muscles was higher by 3.35%, crude fat lower by 1.09% in compare to control. The conclusion was made that supplementation of starter and grower diets for broilers with protein-rich fishmeal results in better productive performance and digestibility of dietary nutrients in compare to entirely vegetable diets without the deterioration of meat quality; better productivity in broilers and lower use of the synthetic amino acids in the diets entirely compensate for the fishmeal related expenses. Keywords: FISHMEAL, BROILERS, AMINO ACIDS, PRODUCTIVE PERFORMANCE, DIGESTIBILITY OF NUTRIENTS, FEED CONVERSION RATIO, MEAT QUALITY

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THE EFFECTS OF THE STRESS OF WEANING AND TRANSIT ON PERFORMANCE AND METABOLIC PROFILE OF BEEF CALVES OF DIFFERENT GENOTYPES

Canadian Journal of Animal Science ◽

10.4141/cjas87-104 ◽

1987 ◽

Vol 67 (4) ◽

pp. 991-999 ◽

Cited By ~ 7

Author(s):

W. A. PHILLIPS ◽

P. E. JUNIEWICZ ◽

M. T. ZAVY ◽

D. L. VON TUNGELN

Keyword(s):

Body Weight ◽

Dry Matter ◽

Metabolic Response ◽

Bos Taurus ◽

Bos Indicus ◽

Serum Glucose ◽

Weight Changes ◽

Metabolic Factors ◽

Beef Calves ◽

Response To Stress

Feeder calves of Bos indicus or Bos taurus breeding, reared under the same management and environmental conditions, were subjected to the stressors of weaning, assembly and transport to determine if genotype of the calf had a significant impact on stress responsive parameters. These responses were measured by monitoring changes in body weight, poststress dry matter intake and selected metabolic factors. Calves lost 11 kg or 8.1% of their weaning body weight during assembly and transit. Genotype was not related to weight changes during assembly and transit; however, Hereford × Brahman calves gained less (P < 0.05) weight during the 28-d post-transit period than Angus × Brahman or Angus × Hereford calves. Serum glucose, urea nitrogen, total protein, potassium and sodium concentrations were altered (P < 0.05) by weaning or transport and were generally higher (P < 0.05) in the half Brahman calves than the Angus × Hereford calves. Within the context and conditions of this experiment, genotype was not related to the metabolic response of the beef calf to the stresses associated with weaning and transport. However, genotype was found to influence basal nonstressed metabolic values indicating that poststress metabolic measurements alone may be misleading as an indication of the physiological response to stress. Key words: Cattle, stress, genotype, glucose, protein, urea

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Microscopic investigations of novel intracellular bodies of a Nocardia SP

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100169511 ◽

1994 ◽

Vol 52 ◽

pp. 356-357

Author(s):

J. L. Stites

Keyword(s):

Uranyl Acetate ◽

Electron Microscopic ◽

En Bloc ◽

Ribonucleic Acids ◽

Transmission Electron ◽

Nocardia Sp ◽

Internal Constitution ◽

Membrane Bound ◽

Molecular Components ◽

Protein Rich

A Nocardia sp.was found during an initial transmission electron microscopic (TEM) examination to have unusual intracellular bodies (ICB's) which do not appear to have been described previously in the literature. Most intracellular structures within bacteria have been classified as storage granules, a product of membrane invagination (i.e. mesosomes), or vacuoles. In bacteria there are no known intracellular membrane-bound organelles, and all internal membranes are invaginations of the unit membrane. Several microscopic-level examinations of the Nocardia sp. ICB's were initiated in order to determine their overall structure, classification, and internal constitution.Different TEM staining procedures were performed to determine possible molecular components of the ICB. In all of the staining protocols the ICB's showed a lack of electron density similar to the cell wall. Because the ICB's showed no affinity to any stain, it appeared they do not have strong positive charge (phosphotungstic acid), are not protein rich (en bloc uranyl acetate), lack glycogen and are not phosphate or sulphur rich (lead citrate), nor do they contain lipids or ribonucleic acids (osmium tetroxide).

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