Tamanho relativo dos órgãos internos e do trato gastrintestinal de bovinos indubrasil e mestiços leiteiros em fase de engorda

Backes, Alfredo Acosta; Paulino, Mário Fonseca; Alves, Dorismar David; Filho, Sebastião de Campos Valadares

doi:10.1590/s0103-84782010005000071

Cited by 6 publications

(8 citation statements)

References 10 publications

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“…However, because crossbred dairy cattle have a greater capacity to accumulate internal fat compared with beef cattle (BACKES et al, 2010;FERNANDES et al, 2005) and because internal fat is metabolically more active than external fat, the energy expenditure for its deposition and maintenance is higher and directly influences the energy requirements for maintenance (VALADARES FILHO et al, 2006). Thus, the increase in internal fat deposition associated with increased concentrate in the cattle found by Neves (2013) with the same animals of this study may have contributed to the high NE m found compared with the data reported in the Brazilian literature.…”

Section: Resultsmentioning

confidence: 99%

“…Most of the beef cattle population in Brazil comprises Zebu breeds, which is why most studies evaluate the nutritional requirements of this species (ALMEIDA et al, 2009;BACKES et al, 2005BACKES et al, , 2010COSTA E SILVA et al, 2012;FREITAS et al, 2006;MARCONDES et al, 2011aMARCONDES et al, , 2011bSOUZA et al, 2012aSOUZA et al, , 2012b. However, male cattle raised in dairy farms are also used for meat production; however, their performance is poorer compared with that of Zebu, and thus, many producers prefer to slaughter them as calves.…”

Section: Introductionmentioning

confidence: 99%

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Energy and protein requirements of crossbred cattle in feedlot

et al. 2016

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The objective of this study is to predict the energy and protein requirements of crossbred dairy cattle in feedlot. The study was conducted at the Unidade Acadêmica de Serra Talhada, Universidade Federal Rural de Pernambuco, Brazil with 30 bulls with a body weight of 339.1 ± 35.4 kg. Five animals were slaughtered at the end of the adaptation period to serve as the reference group; the remainder of the animals was slaughtered after 112 days. The latter group was randomly allocated to receive five treatments: 0, 17, 34, 51 and 68% of concentrate in the feed using a completely randomized design. The dietary intake of the animals that were not given concentrate was restricted to 1.5% of their body weight; these animals composed the group fed for maintenance. The body composition and empty body weight (EBW) were estimated by means of the comparative slaughter method and full dissection of a half-carcass. The results showed that for crossbred dairy bulls in confinement, the net and metabolizable energy requirements were 86.49 and 138 kcal EBW -0.75 day -1 , respectively, and the efficiency of use of metabolizable energy for maintenance and gain were 62.67% and 31.67%, respectively. The net energy (NE g ) and net protein (NP g ) requirements for gain can be estimated using the following equations, respectively: NE g = 0.0392*EBW e PLg = 242,34 × GPCVZ -23,09 × ER, respectivamente. A eficiência do uso da proteína metabolizável para ganho foi de 25,8% enquanto que as exigências de proteína para mantença foram 2,96 g PCVZ -0,75 dia -1 . A proteína degradável no rúmen pode suprir 62,44% das exigências em proteína bruta de bovinos mestiços leiteiros, machos não castrados, em confinamento, com peso corporal de 450 kg e ganho de 1 kg dia -1 . Palavras-chave: Composição corporal. Ganho de peso. Mantença.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Energy and protein requirements of crossbred cattle in feedlot

et al. 2016

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“…Leg + head + skin strongly influences carcass yield (Backes et al, 2006). In the present study, this group represented 24.8% of the EBW of the animals, a very high value when compared to that observed Backes et al (2010) which was 17.6% for castrated males (Indubrasil). The head weight of animals fed 0.3% supplementation differed (p < 0.05), by Dunett's test, from cattle fed only mineral mix (0% supplement).…”

Section: Resultsmentioning

confidence: 39%

“…The sum of empty rumen, reticulum, omasum and abomasum weight was 4% of bovine EBW. Backes et al (2006) and Backes et al (2010) observed that pre-stomachs and abomasum represented about 3% EBW in zebu animals. Reticulum and omasum weight, at 0.3% supplement level, differed from the treatment in which the animals received only mineral mix (0% supplement).…”

Section: Resultsmentioning

confidence: 99%

“…Animal performance represents gain of carcass components (muscle, fat and bones) and non-carcass components (NCC) (organs, viscera and slaughter by-products). The NCCs represent more than 50% of the cattle empty body weight (Backes, Paulino, Alves, & Valadares Filho, 2010) and are demanded by pet food, pharmaceutical, clothing and chemistry industries (Toldrá, Mora, & Reig, 2016). According to Vaz et al (2015), non-carcass components add from R$ 0.71 to R$ 0.80 per kilogram of carcass to the frigorific industry.…”

Section: Introductionmentioning

confidence: 99%

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Body weight components of Nellore steers finished in tropical pastures

Almeida

Oliveira

et al. 2018

Acta Sci. Anim. Sci.

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The aim of this study was to evaluate the effect of increasing levels of supplementation on body weight components of Nellore cattle grazing in Urochloa brizantha. Twenty-four steers with initial body weight (BW) of 371 ± 14 kg and average age of 26 months were used. Four animals were slaughtered at the beginning of the experiment as a reference and the others were distributed in 4 treatments [0.0% (mineral salt), 0.3%, 0.6% and 0.9% supplement BW]. The slaughter of the experimental group was performed when the animals reached 450 kg and the body weight components were weighed. Data were submitted to analysis of variance and regression. The increase in supplementation level reduced (p < 0.05) pasture dry matter intake, but did not influence (p > 0.05) on empty body weight (EBW) (380.3 kg) and cold carcass weight (CCW) (247.5 kg). The weights of skin, liver, rumen and fat were not influenced (p > 0.05) by supplementation level. The animals gained, on average, 75.3 kg EBW and 50.7 kg CCW, but the treatments did not influence (p > 0.05) the gains of body weight components. The increasing of energetic-protein supplement level for Nellore steers in Urochloa brizantha pasture does not affect carcass and non-carcass components.

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Morphometry of cryopreserved organs from the gastrointestinal system of squirrel monkeys (Saimiri sciureus, Linnaeus, 1758) for improvement of management

Andrade

Lemos

Lopes

et al. 2022

J of Medical Primatology

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Background Nonhuman primates (NHPs) are fundamental for countless types of research and their phylogenetic similarities with humans make them valuable biomodels. Saimiri (squirrel monkeys) is the New World simian genus that is most widely used in research; however, little is known about the morphology of the gastrointestinal tract (GIT) of these animals. Methods The morphological and topographical aspects of GIT organs from 14 previously frozen carcasses of captive squirrel monkeys (Saimiri sciureus) were described as a means for refining clinical and laboratory diagnoses, with the aim of providing a basis for clinical assessments and animal management. The carcasses were gradually thawed, macroscopically evaluated for their appearance, measured, weighed, photographed, and necropsied. The characteristics of all the GIT organs (main and accessories) were evaluated, with measurement of the dimensions and description of the shape, consistency, and color of each one. Results The stomach of squirrel monkeys is simple and of non‐compartmentalized type and the cecum does not have numerous folds, compared with other species. These characteristics are compatible with omnivorous simian species with no adaptive digestive specialization for the food fermentation process. Significant correlations were found between the weights of the carcass and GIT (p < .05); carcass and tongue (0.83; p < .01); and liver and right salivary gland (0.83; p < .01). It was also observed that the animals showed good body score conformation and GIT organs in good condition, which indicated that their nutritional management had been adequate. Regarding the correlations found among the organs: (i) squirrel monkeys with heavier carcasses had better‐developed GIT with greater food storage capacity; (ii) the bigger the animal was, the greater its overall muscle development was, including that of the tongue, which would enable intensification of its feeding activity; and (iii) the measurements of the esophagus, small and large intestines, pancreas, and salivary glands were not sex‐dependent in Saimiri sciureus. Conclusions Previously cryopreserved carcasses of squirrel monkeys can be used for gastrointestinal system studies, with the potential to make clinical, zootechnical, management, and scientific contributions.

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Tamanho relativo dos órgãos internos e do trato gastrintestinal de bovinos indubrasil e mestiços leiteiros em fase de engorda

Abstract: Relative size of the internal organs and gastrointestinal tract of dairy crossbreeds and zebu steers in fattening RESUMO

Cited by 6 publications

References 10 publications

Energy and protein requirements of crossbred cattle in feedlot

Energy and protein requirements of crossbred cattle in feedlot

Body weight components of Nellore steers finished in tropical pastures

Morphometry of cryopreserved organs from the gastrointestinal system of squirrel monkeys (Saimiri sciureus, Linnaeus, 1758) for improvement of management

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