Consulta: subjectFacets:"Feed efficiency"
Registros recuperados: 49
Data/hora: 11/06/2024 09:14:43

Agonistic behaviour and feed efficiency in juvenile Nile tilapia Oreochromis niloticus
Provedor de dados: 5
Autores: De Verdal, Hugues; O'Connell, Catherine Maeve; Mekkawy, Wagdy; Vandeputte, Marc; Chatain, Beatrice; Bégout, Marie-laure; Benzie, John A.h.
Given the strong effects of behavioural hierarchies on growth in many cultured species and the key role of feed efficiency in aquaculture economics, understanding the nature of the interaction of these variables is important for the sustainability of aquaculture. The relationship between agonistic behaviour, growth and feed efficiency in Nile tilapia, Oreochromis niloticus, was studied by rearing 120 fish in eight aquaria. Fish were video-recorded to estimate the occurrence of agonistic behaviour during a fasting and a refeeding period. Growth, feed intake and feed conversion efficiency (FCE - calculated as the inverse of feed conversion ratio (FCR)) were subsequently measured individually for each fish. Fish showed 58% less agonistic traits during the...
Tipo: Text
Palavras-chave: Agonstic behaviour; Feed efficiency; Nile tilapia; Performances; Correlation.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00483/59495/62363.pdf

A brief review of nutritional studies for Penaeus monodon
Provedor de dados: 5
Autores: Liao, I; Liu, F.
In order to develop effective formulated for Penaeus monodon , sufficient information is needed on its nutritional requirements. Unfortunately, research on this area has been very limited. This paper outlines the results of such research. Since data on the nutritional requirements of P. japonicus are relatively well established, some of these data are also reviewed in this paper and are used as a basis for assessing the nutritional requirements of P. monodon . Protein, lipid, carbohydrate, mineral and vitamin requirements are evaluated from the parameters of growth survival and feed efficiency. Studies on the effects of enzymes and the development of microparticulate diet for larvae are also summarized.
Tipo: Text
Palavras-chave: Penaeus monodon; Pond culture; Shrimp culture; Amino acids; Fatty acids; Marine crustaceans; Diets; Enzymes; Feed efficiency; Survival; Growth; Vitamins; Carbohydrates; Lipids; Proteins.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1471.pdf

Can individual feed conversion ratio at commercial size be predicted from juvenile performance in individually reared Nile tilapia Oreochromis niloticus?
Provedor de dados: 5
Autores: Rodde, Charles; Chatain, Beatrice; Vandeputte, Marc; Quoc Trinh, Trong; Benzie, John A.h.; De Verdal, Hugues.
Feed conversion ratio (FCR), the ratio between feed intake and body weight gain, is of major interest for improving aquaculture sustainability through reduced feed costs and environmental impacts. Demonstrating whether FCR measured in juvenile fish is an accurate predictor of their performance during the whole rearing period is critical to developing genetic improvement programs for this trait. This is especially true for estimates obtained in individually reared fish, for which this has high implications regarding the size of the necessary rearing structures. We obtained individual FCR from 30 male Nile tilapia Oreochromis niloticus from the GIFT strain individually reared in a recirculating system, from 36 to 260 g mean weight. They were fed twice a day...
Tipo: Text
Palavras-chave: Feed efficiency; GIFT tilapia; Individual rearing; Selective breeding.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00630/74175/73757.pdf

The Effects of Feed Restriction and Isolated or Group Rearing on the Measurement of Individual Feed Intake and Estimation of Feed Conversion Ratio in Juvenile Nile Tilapia (Oreochromis niloticus) for Selective Breeding Purposes
Provedor de dados: 5
Autores: Rodde, Charles; Vandeputte, Marc; Quoc Trinh, Trong; Douchet, Vincent; Canonne, Marc; Benzie, John A. H.; De Verdal, Hugues.
Accurately measuring the phenotype at the individual level is critical to the success of selective breeding programs. Feed efficiency is a key sustainability trait and is typically approached through feed conversion ratio (FCR). This requires measurements of body weight gain (BWG) and feed intake (FI), the latter being technically challenging in fish. We assessed two of the principal methods for measuring feed intake in fish over consecutive days: (1) group rearing 10 fish per group and video recording the meals and (2) rearing fish individually on a restricted ration. Juvenile Nile tilapia (Oreochromis niloticus) from the Genetically Improved Farmed Tilapia (GIFT) strain and the Cirad strain were entered into the study (128 GIFT and 109 Cirad). The GIFT...
Tipo: Text
Palavras-chave: Feed efficiency; Individual rearing; Group rearing; Fish; Video analyses; Feed intake.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00677/78924/81292.pdf

Effect of past nutritional history and fasting on feed intake and growth in rainbow trout Oncorhynchus mykiss
Provedor de dados: 5
Autores: Boujard, Thierry; Burel, Christine; Medale, Francoise; Haylor, Graham; Moisan, Annick.
Groups of juvenile rainbow trout were fed to satiation for 10 days after 1, 11 and 21 days of feed deprivation. These fish (initial body weight =20 +/- 2 g) were previously fed at different feeding levels (0.5 or 1.5% initial body weight, to satiation) with a high (20.4 kJ . g(-1)) or a low (16.2 kJ.g(-1)) digestible energy diet content for 34 days. It is shown that past nutritional history affected growth performance: duration of feed deprivation has a major effect on intake and feed conversion efficiency; previous feeding level has an effect on intake; dietary energy content affected feed conversion efficiency. In addition, an attempt was made to identify some of the metabolic parameters that could be involved in the increase in growth performance during...
Tipo: Text
Palavras-chave: Feed efficiency; Appetite; Past nutritional history; Compensatory growth; Aquaculture.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-1399.pdf

Effects of temperature on the growth of pollack (Pollachius pollachius) juveniles
Provedor de dados: 5
Autores: Person, Jeannine; Buchet, Vincent; Vincent, Benoit; Le Delliou, Herve; Quemener, Loic.
Growth of juvenile pollack was assessed at five constant temperatures (9, 12, 15, 18 and 21 degrees C) in an 84-day trial. Duplicate groups of 75 fish (initial weight 143 +/- 2 g) were held in O-2 saturated water (102-103% saturation) and fed to apparent satiation. Growth increased as temperature increased from 9 degrees C up to a plateau at 12-15 degrees C (NS differences between 12 and 15 degrees C) followed by a decrease from 18 degrees C. No growth occurred at 21 degrees C. For the overall period, specific growth rates were 0.52% and 0.53% day(-1) at 12 and 15 degrees C compared to 0.40% day(-1) at 18 degrees C. Feed intake was maximum at 15-18 degrees C (0.68-0.69% day(-1)) and it was significantly lower at 21 degrees C (0.45% day(-1)). Apparent feed...
Tipo: Text
Palavras-chave: Feed efficiency; Growth; Temperature; Pollack.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1122.pdf

Mineral requirement of Penaeids
Provedor de dados: 5
Autores: Piedad-pascual, F.
Marine shrimps absorb minerals from their aquatic environment aside from the minerals that come from the food they eat. Thus, the dietary requirement of shrimps for certain minerals will depend on the amounts and availability of these minerals in the aquatic environment. Dietary sources for growth may be necessary due to losses during moltings.
Tipo: Text
Palavras-chave: Penaeus californiensis; Penaeus monodon; Penaeus japonicus; Penaeidae; Malacostraca; Juveniles; Moulting; Feed efficiency; Survival; Growth; Phosphorus; Calcium; Diets; Shrimp culture; Nutritional requirements.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1454.pdf

Improving feed efficiency in fish using selective breeding: a review
Provedor de dados: 5
Autores: De Verdal, Hugues; Komen, Hans; Quillet, Edwige; Chatain, Beatrice; Allal, Francois; Benzie, John A. H.; Vandeputte, Marc.
Improving feed efficiency (FE) is key to reducing production costs in aquaculture and to achieving sustainability for the aquaculture industry. Feed costs account for 30–70% of total production costs in aquaculture; much work has been done on nutritional and husbandry approaches to improve FE but only a limited amount of research has been devoted to using genetics, despite its potential. This paper reviews past work to improve FE in fish using selective breeding and assess future directions. Direct selection on FE traits requires methods to measure individual feed consumption and estimate FE efficiently and accurately. This is particularly difficult to do in fish because of the environment in which they live. Many of the published studies on FE were found...
Tipo: Text
Palavras-chave: Feed conversion ratio; Feed efficiency; Feed intake; Fish; Genetics; Selection.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00415/52675/53771.pdf

In search for indirect criteria to improve residual feed intake in sea bass (Dicentrarchus labrax) Part I: Phenotypic relationship between residual feed intake and body weight variations during feed deprivation and re-feeding periods
Provedor de dados: 5
Autores: Grima, Laure; Vandeputte, Marc; Ruelle, Francois; Vergnet, Alain; Mambrini, Muriel; Chatain, Beatrice.
No commercial breeding programs have yet started to improve feed utilization efficiency in fish, mainly because of the difficulty in accurately measuring individual feed intake in fish reared in groups. Our general goal is to propose indirect criteria to be used for breeding of commercial lines. In a previous study undertaken with rainbow trout clones, a genetic correlation was detected between residual feed intake (RFI), and body weight variation during successive periods of feed deprivation (FD) and re-feeding (RF). To assess the pertinence of such indirect criteria for future breeding programs, we set up a large experiment using sea bass (Dicentrachus labrax), a recently domesticated species with broad genetic diversity. The objectives of the present...
Tipo: Text
Palavras-chave: European sea bass; Dicentrachus labrax; Feed efficiency; Residual feed intake; Feed deprivation; Compensatory growth; Selective breeding.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00002/11297/7838.pdf

In search for indirect criteria to improve feed utilization efficiency in sea bass (Dicentrarchus labrax) Part II: Heritability of weight loss during feed deprivation and weight gain during re-feeding periods
Provedor de dados: 5
Autores: Grima, Laure; Chatain, Beatrice; Ruelle, Francois; Vergnet, Alain; Launay, Amandine; Mambrini, Muriel; Vandeputte, Marc.
Selective breeding to improve residual feed intake (RFI) in sea bass (Dicentrarchus labrax) is a major goal that would optimize economic gain while minimizing the environmental impact of production. Due to the difficulty in accurately measuring individual feed intake, no selective breeding program has yet been started. In a previous study, we identified a criterion phenotypically related to RFI variations: the loss of weight during feed deprivation, FD. Moreover, an additional composite criterion (CC) integrating both FD and weight gain during subsequent re-feeding (RF) was closely related to RFI, even though the relationship was only close to significance (P=0.06). The aim of the present study was to estimate the heritability of these two traits, in order...
Tipo: Text
Palavras-chave: European sea bass; Dicentrarchus labrax; Feed efficiency; Heritability; Genetic parameters; Residual feed intake; Feed deprivation; Compensatory growth; Selective breeding.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00004/11529/8213.pdf

Feed intake, molt frequency, tissue growth, feed efficiency and energy budget during a molt cycle of mud crab juveniles, Scylla serrata (Forskål, 1775), fed on different practical diets with graded levels of soy protein concentrate as main source of protein
Provedor de dados: 5
Autores: Nguyen, Ngoc Thi Bich; Chim, Liet; Lemaire, Pierrette; Wantiez, Laurent.
There has been growing interest in the development of mud crab aquaculture in New Caledonia. However, for this to become established at a commercial level, a cost-effective formulated feed based on internationally-available ingredients needs to be developed. We have evaluated the optimal dietary protein content for juvenile crabs, Scylla serrata (Forskål, 1775), using a series of diets with a protein content ranging from 27 to 49% and soy protein concentrate (SPC) as the main protein source. For this purpose, 54 individually housed crabs were allocated to five dietary treatments (n = 10 or 11). The crabs were fed ad libitum, for 81 days with the allocated diets. The apparent digestibilities of dry mater, crude protein and energy were high (96.2-97.3%),...
Tipo: Text
Palavras-chave: Scylla serrata; Tissue growth; Feed efficiency; Protein requirement; Soy protein concentrate; Energy budget.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00211/32196/30630.pdf

Environmental impacts of genetic improvement of growth rate and feed conversion ratio in fish farming under rearing density and nitrogen output limitations
Provedor de dados: 5
Autores: Besson, M.; Aubin, J.; Komen, H.; Poelman, M.; Quillet, E.; Vandeputte, Marc; Van Arendonk, J. A. M.; De Boer, I. J. M.
Today, fish farming faces an increasing demand in fish products, but also various environmental challenges. Genetic improvement in growth rate and feed conversion ratio is known to be an efficient way to increase production and increase efficiency in fish farming. The environmental consequences of genetic improvement in growth rate and feed conversion ratio, however, are unknown. In this study, we investigated the environmental consequences of genetic improvement in growth rate and feed conversion ratio in an African catfish farm, using Recirculating Aquaculture System (RAS). In RAS, total fish production of the farm is limited by rearing density or by the capacity to treat dissolved nitrogen. To evaluate the environmental consequences of genetic...
Tipo: Text
Palavras-chave: Life cycle assessment; African catfish; Feed efficiency; Recirculating aquaculture system; Selection; Thermal growth coefficient.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00302/41355/40546.pdf

Effect of selection for fasting tolerance on feed intake, growth and feed efficiency in the European sea bass Dicentrarchus labrax
Provedor de dados: 5
Autores: Daule, Sophie; Vandeputte, Marc; Vergnet, Alain; Guinand, Bruno; Grima, Laure; Chatain, Beatrice.
Feed efficiency is a major goal for aquaculture sustainability, and selecting fish to genetically enhance this trait would be highly valuable. However, no selective breeding program specifically targeted to feed efficiency exists for farmed fish, mostly because of the difficulty of measuring individual feed intake. However, a negative phenotypic correlation between feed efficiency and weight loss at fasting has been previously demonstrated in sea bass submitted to feed deprivation (FD). We mated sea bass parents selected for their high (FD+) or low (FD-) weight loss at fasting to produce FD+ and FD- progeny, which were reared in a single tank to avoid common environmental effects. At 8 months of age, 1200 of those fish were submitted to three alternating...
Tipo: Text
Palavras-chave: European sea bass; Dicentrarchus labrax; Selective breeding; Feed efficiency; Fasting tolerance.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00189/29985/28483.pdf

Population, Temperature and Feeding Rate Effects on Individual Feed Efficiency in European Sea Bass (Dicentrarchus labrax)
Provedor de dados: 5
Autores: Rodde, Charles; Vandeputte, Marc; Allal, Francois; Besson, Mathieu; Clota, Frederic; Vergnet, Alain; Benzie, John A. H.; De Verdal, Hugues.
Using breeding programs to improve feed efficiency, the ratio between fish body weight gain (BWG) and feed intake (FI), could increase aquaculture sustainability through reduced feed costs and environmental impact. To this end, individual phenotypic information is required. Individual FI can be measured by isolating each fish. Under these conditions, restricting the feeding rate has proved relevant to improve feed efficiency indirectly by selecting faster-growing animals. Moreover, a restricted feeding rate reduces the work load of collecting uneaten pellets after each meal. The approach assumes the most efficient fish at high and low feeding rates are the same, but this assumption remains untested. In European sea bass (Dicentrarchus labrax), feed...
Tipo: Text
Palavras-chave: Aquaculture; Individual rearing; Feed efficiency; Feeding rate; Fasting tolerance; Sea bass.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00654/76614/77767.pdf

Estimation of genetic parameters of feed conversion ratio based on individual phenotypes and genomic data in sea bass
Provedor de dados: 5
Autores: Besson, Mathieu; Allal, Francois; Chatain, Beatrice; Vergnet, Alain; Clota, Frederic; Ferrari, Sebastien; Vandeputte, Marc.
We estimated genetic parameters of feed conversion ratio (FCR) and daily growth coefficient (DGC) using individual phenotypes measured in aquariums under a restricted feeding regime and genomic information on 2,722 SNP markers. The results showed a moderate heritability of both traits (0.26 for FCR and 0.41 for DGC) as well as close to unity negative genetic correlation between them. Thus, FCR of fish in aquariums could be improved by selecting fish for higher DGC. Nevertheless, these results must be taken with caution until we know whether individual FCR measured in aquariums also reflects the FCR of fish reared in groups.    
Tipo: Text
Palavras-chave: Feed efficiency; Fish; Genomics.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00446/55756/57416.pdf

No efficiency of the lateral system on nocturnal feeding in the European sea bass (Dicentrarchus labrax L.)
Provedor de dados: 5
Autores: Faucher, Karine; Dutto, Gilbert; Coves, Denis; Aubert, Anne; Lagardere, Jean-paul.
In order to evaluate the effect and consequence of lateral system inactivation on fish nocturnal feeding, the differential growth of groups of European sea bass maintained in different rearing conditions were compared. Whereas some fish with intact lateral system (placebo fish) were placed under a photoperiod of 12-L: 12-D, other placebo fish were kept in the dark. In the same way, fish deprived of lateral system by section of their lateral system nerves and antibiotic treatment were placed under a photoperiod of 12-L: 12-D and the others in the dark. For each of these four rearing conditions, two sets of experiment were realized. Percent mortality, feed rhythm, averaged daily feed demand, specific growth rate and feed efficiency were compared among these...
Tipo: Text
Palavras-chave: Feed efficiency; Growth; Nocturnal feeding; Photoperiod; Lateral system; European sea bass.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2267.pdf

Effets de l’incorporation de la farine de tomate dans l’alimentation du Tilapia du nil (oreochromis niloticus, l., 1758) en élevage  dans les eaux géothermales du sud Tunisien
Provedor de dados: 20
Autores: Azaza, M.S.; Mensi, F.; Imouri Toko, I.; Dhraief, M.N.; Abdelmouleh, A.; Brini, B.; Kraiem, M.M.
Afin de réduire le coût des aliments aquacoles, nous avons procédé à la substitution d’une matière première végétale importée: le tourteau de soja (TS) par un sous produit local : la farine de tomate (FT). L’expérience est menée sur des juvéniles de Tilapia (Oreochromis niloticus) monosexe mâle ayant un poids moyen initial de 20,54 ± 0,08 g. (poids moyen ± ES), et elle consiste à tester 4 régimes alimentaires isoprotéiques (27 % de protéines) et isoénergétiques (17 KJ/g) contenant différents taux de farine de tomate: 0 % (aliment témoin), 10 %, 20 % et 30 % noté respectivement A0, A10, A20 et A30. Ces aliments sont testés, durant 75 jours.  A la fin de l’expérience les poids moyens finaux ont atteint des valeurs comprises entre 98,62 g et 129,77 g selon...
Tipo: Journal Contribution
Palavras-chave: Diets; Digestibility; Feed efficiency; Feeding experiments; Fish culture; Growth; Marine aquaculture; Nutrition; Oreochromis niloticus; Http://aims.fao.org/aos/agrovoc/c_34687.
Ano: 2006
URL: http://hdl.handle.net/1834/4238

International study on &lt;i&gt;Artemia&lt;/i&gt; : 30. Bio-economic evaluation of the nutritional value for carp (&lt;i&gt;Cyprinus carpio&lt;/i&gt; L.) larvae of nine &lt;i&gt;Artemia&lt;/i&gt; strains
Provedor de dados: 27
Autores: Vanhaecke, P.; Sorgeloos, P.
The nutritional value of fresh hatched nauplii from nine geographical strains of brine shrimp, &lt;i&gt;Artemia&lt;/i&gt; , was determined for larvae of the carp (&lt;i&gt;Cyprinus carpio&lt;/i&gt;). After 2 weeks of culture, the survival of carp larvae was over 90% and no significant differences in survival among treatments were detected. The growth rate of the larvae, however, was a function of the &lt;i&gt;Artemia&lt;/i&gt; strain used. The highest weight gains were recorded with parthenogenetic &lt;i&gt;Artemia&lt;/i&gt; , to the lowest with Chaplin Lake brine shrimp and intermediate results with the other bisexual strains. With the exception of the Chaplin lake strain, the growth results were positively correlated with the size and weight of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Feed efficiency; Nutritional requirements; Artemia; Cyprinus carpio.
Ano: 1983
URL: http://www.vliz.be/imisdocs/publications/261900.pdf

Hematological profile of beef cattle with divergent residual feed intake, following feed deprivation
Provedor de dados: 86
Autores: Gomes,Rodrigo da Costa; Siqueira,Renata Farinelli de; Ballou,Michael Alan; Stella,Tiago Roberto; Leme,Paulo Roberto.
The objective of this work was to characterize the hematological profiles of steers and bulls, according to residual feed intake (RFI), after feed deprivation. Twenty‑month‑old Nellore steers and bulls were fed feedlot diets for 70 and 56 days, respectively. RFI was calculated as the difference between actual feed intake and expected feed intake. More and less efficient steers and bulls, according to RFI, were subjected to 24 hours of food deprivation. Blood was sampled prior to and following the withdrawal period. Hematological analyses included total and differential white blood cell count, red blood cell count and morphology, and plasma glucose concentration. Variation in RFI did not influence plasma glucose concentration or blood cell profiles. Glucose...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bos indicus; Fasting; Feed efficiency; Leukocytes; Stress.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011000900019

The role of cattle genetically efficient in feed utilisation in an Australian carbon trading environment
Provedor de dados: 31
Autores: Arthur,   Paul F.; Herd,   Robert M.; Basarab,   John A.
Special Edition Sheep and Cattle Production in New South Wales
Tipo: Article
Palavras-chave: Feed efficiency; Residual feed intake; Methane; Greenhouse gas; Emission; Beef cattle; Farm Management.
Ano: 2011
URL: http://purl.umn.edu/121457

ANTIMICROBIAL DRUG USE AND VETERINARY COSTS IN U.S. LIVESTOCK PRODUCTION
Provedor de dados: 31
Autores: Mathews,   Kenneth H., Jr.
Antimicrobial drugs are fed to animals at low levels to treat diseases, to promote growth, and to increase feed efficiency. Incorporating low levels of antimicrobial drugs in livestock feeds has been shown to be a factor stimulating the development of antimicrobial drug resistant bacteria in livestock. Since many of the drugs used to treat livestock are the same as or are related to drugs used in human health care, there is concern that resistant organisms may pass from animals to humans through the handling of animals or food derived from animals. The movement of pathogens from animals to humans, and vice versa, has been documented, but the extent to which it has occurred or could occur is unknown. Although it is estimated that as little as 10 percent of...
Tipo: Report
Palavras-chave: Antimicrobial drugs; Pathogens; Growth promotion; Feed efficiency; Therapeutic drug use; Subtherapeutic drug use; Subclinical; Livestock Production/Industries.
Ano: 2001
URL: http://purl.umn.edu/33695

ECONOMIC EFFECTS OF A BAN AGAINST ANTIMICROBIAL DRUGS USED IN U.S. BEEF PRODUCTION
Provedor de dados: 31
Autores: Mathews,   Kenneth H., Jr.
Economic effects for three scenarios of antimicrobial drug use in livestock production -- a no-ban scenario and two levels of bans -- are examined through cost minimization and a partial equilibrium analysis.  Results indicate that regulating antimicrobial drug use in livestock production would increase per-unit costs of producers previously using drugs and reduce beef supplies in the short run, reducing consumer surplus.  Producers not previously using drugs would benefit from short-run price increases.
Tipo: Journal Article
Palavras-chave: Antimicrobial drug; Ban; Beef production; Cost minimization; Feed efficiency; Growth function; Growth promotant; Livestock Production/Industries; C61; D21; D41; I118; Q11; Q12; Q18; R38.
Ano: 2002
URL: http://purl.umn.edu/15068

ECONOMIC IMPACTS OF BANNING SUBTHERAPEUTIC USE OF ANTIBIOTICS IN SWINE PRODUCTION
Provedor de dados: 31
Autores: Brorsen,   B. Wade; Lehenbauer,   Terry; Ji,   Dasheng; Connor,   Joseph.
Public health officials and physicians are concerned about possible development of bacterial resistance and potential effects on human health that may be related to the use of antimicrobial agents in livestock feed.  The focus of this research is aimed at determining the economic effects that subtherapeutic bans of antimicrobials would have on both swine producers and consumers.  The results show that a ban on growth promotants for swine would be costly, totaling $242.5 million annually, with swine producers sharing the larger portion in the short run and consumers sharing the larger portion in the long run.
Tipo: Working or Discussion Paper
Palavras-chave: Banning subtherapeutic use; Feed efficiency; Mortality rate; Sort loss; Livestock Production/Industries; Q18; D61.
Ano: 2002
URL: http://purl.umn.edu/15078

Comparison between linear and nonlinear systems of feed formulation for broilers
Provedor de dados: 89
Autores: Dadalt,JC; Butzen,FM; Ribeiro,AML; Renz,SV; Kessler,A de M; Penz Júnior,AM.
Two experiments were simultaneously carried out to compare feed formulation models: a linear model for minimum cost with a nonlinear model for maximum profitability for one-to 42-d-old broilers. One-d-old male or female Cobb 500 broilers (n=2368) were allocated to one of the two trials according to sex. The experiments were performed simultaneously in an experimental poultry farm. Two housing densities were used: high density (HDH), with 14 birds/m2, and low density (LDH), with 10 birds/m2. The following treatments were evaluated: linear feed formulation and LDH (LF10); nonlinear formulation and LDH (NF10); linear formulation and HDH (LF14); and nonlinear formulation and HDH (NF14). A completely randomized design with four treatments of eight replicates...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Feed efficiency; Nutritional strategies; Profitability.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000100109

Effects of Lactobacillus buchneri on the nutritive value of sugarcane silage for finishing beef bulls
Provedor de dados: 96
Autores: Schmidt,Patrick; Nussio,Luiz Gustavo; Queiroz,Oscar Cézar Müller; Santos,Mateus Castilho; Zopollatto,Maity; Toledo Filho,Sérgio Gil de; Daniel,João Luiz Pratti.
Lactobacillus buchneri 40788 and the fibrolytic enzymes β-glucanase and xylanase were applied to chopped sugarcane to study their effects on the nutritive value of silage. Sugarcane was mechanically harvested after 14 mo of growth and treated without (control) or with L. buchneri at a theoretical application rate of 5 × 10(4) cfu/g, 1 × 10(5) cfu/g, or 1 × 10(5) cfu/g plus enzymes. Forage was packed into farm-scale bag silos (40 t/silo) and stored for 92 d. Fifty-six bulls (32 Nellore and 24 Charolais × Nellore) were housed in 20 collective pens and fed diets comprising (dry matter [DM] basis) 458 g/kg sugarcane silage and 542 g/kg concentrates for an 84-d period. Treated silages had higher concentrations of acetic acid and lower concentrations of ethanol....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Feed efficiency; Heterolactic bacteria; Saccharum officinarum L.; Voluntary feed intake.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000100002

Relationship between residual feed intake and enteric methane emission in Nellore cattle
Provedor de dados: 96
Autores: Mercadante,Maria Eugênia Zerlotti; Caliman,Ana Paula de Melo; Canesin,Roberta Carrilho; Bonilha,Sarah Figueiredo Martins; Berndt,Alexandre; Frighetto,Rosa Toyoko Shiraishi; Magnani,Elaine; Branco,Renata Helena.
Feed intake and average daily gain (ADG) in Nellore cattle were determined to calculate residual feed intake in two performance tests: first during the growth phase (RFIgrowth) and then during a measurement of the methane emission phase (RFImet). During the RFIgrowth test, 62 males and 56 females were classified as low-, medium-, and high-RFI. Enteric methane emission was measured in 46 animals; 23 males used for RFImet measurement plus 23 females (22 low-RFIgrowth and 24 high-RFIgrowth). Diet consisted of Brachiaria brizantha cv. Marandu hay (445 g/kg DM) and concentrate (555 g/kg DM). During the RFIgrowth and RFImet phases, DMI was lower in the animals with low RFI, with no difference in ADG. Residual feed intake was -0.359 and 0.367 kg DM/d for low- and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beef cattle; Enteric methane production; Feed efficiency; Performance; Sulfur hexafluoride.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982015000700255

Bionutritional efficiency of crossbred beef cattle finished on feedlot andslaughtered at different body weights
Provedor de dados: 96
Autores: Mello,Renius; Queiroz,Augusto César de; Faria,Marcelo Henrique de; Henrique,Douglas Sampaio; Maldonado,Fabiana.
The objective of this study was to assess the bionutritional efficiency of crossbred F1 Red Angus × Nellore (½ RA ½ N) and F1 Blonde D'Aquitaine × Nellore (½ BA ½ N) young bulls finished on feedlot and slaughtered at 480, 520 and 560 kg body weight. A completely randomized experimental design in a 2 × 3 (genetic group × slaughter weight) factorial arrangement with six replicates was used. The ½ BA ½ N young bulls showed higher kidney, pelvic and inguinal fat (KPIF, kg and % BW) and lower multivariate biological nutritional index (MBNI) and residual feed intake than ½ RA ½ N young bulls. The young bulls slaughtered at heavier weight had larger ribeye area (cm²), fat thickness over the 12-13th rib, fat thickness over the rump, KPIF (kg and % BW), dry matter...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal performance; Feed efficiency; Feed conversion; Kleiber ratio; Multivariate biological nutritional index; Residual feed intake.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000300018

Performance of dairy cows fed rations produced with sugarcane silages treated with additives or fresh sugarcane
Provedor de dados: 96
Autores: Pedroso,André de Faria; Nussio,Luiz Gustavo; Rodrigues,Armando de Andrade; Santos,Flávio Augusto Portela; Mourão,Gerson Barreto; Barioni Júnior,Waldomiro.
An experiment was performed aiming at evaluating the performance of dairy cows fed sugarcane silages treated with additives compared to cows fed fresh forage. Twenty-four Holstein cows were grouped in blocks of three cows, according to parity order and milk production level, in multiple 3 x 3 Latin Square design to evaluate three types of ration (63% roughage and 37% concentrate in dry matter - DM): ration with silage treated with urea (5.0 g/kg of fresh forage - FF) + sodium benzoate (0.5 g/kg FF); ration with silage inoculated with Lactobacillus buchneri (5 x 10(4) cfu/g FF); ration with fresh sugarcane. Each evaluation period consisted of two weeks for adaptation and one week for data collection. Cows fed rations with silages treated with urea +...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Feed efficiency; L. Buchneri; Milk composition; Milk production; Sodium benzoate; Urea.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000900005

Animal performance and carcass characteristics of Nellore young bulls fed coated or uncoated urea slaughtered at different weights
Provedor de dados: 96
Autores: Pazdiora,Raul Dirceu; Resende,Flávio Dutra de; Faria,Marcelo Henrique de; Siqueira,Gustavo Rezende; Almeida,Geraldo Benedito de Souza; Sampaio,Ricardo Linhares; Pacheco,Paulo Santana; Prietto,Murilo Sergio Rodrigues.
The objective of this study was to evaluate animal performance and carcass characteristics of 64 Nellore young bulls at 22 months of age finished in a feedlot and slaughtered at five body weights (350; 455; 485; 555 and 580 kg) fed diets containing coated or uncoated urea. The experimental design adopted was completely randomized, set in a 4 × 2 factorial arrangement, and for the variables assessed in the control animals, it was 5 × 2. No effect of interaction between slaughter weights and diets were observed, so the variables were analyzed separately, compared by polynomial contrasts and by the F test, respectively. The time animals remained in the feedlot to reach slaughter weights was 66, 88, 145 and 194 days. Average daily gain (ADG) showed quadratic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Body composition; Fat thickness; Feed efficiency; Feedlot; Gain yield; High grain rations.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000400007

Corn silage with and without enzyme-bacteria inoculants on performance, carcass characteristics and meat quality in feedlot finished crossbred bulls
Provedor de dados: 96
Autores: Fugita,Carlos Alberto; Prado,Ivanor Nunes do; Jobim,Clóves Cabreira; Zawadzki,Fernando; Valero,Maribel Velandia; Pires,Maria Carla de Oliveira; Prado,Rodolpho Martin do; Françozo,Mônica Chaves.
Two height cuttings of corn silage with or without enzyme inoculants were evaluated for 68 days on performance, carcass characteristics, meat quality and chemical composition of the Longissimus muscle in crossbred bulls (F1 - ½ Nellore vs. ½ Angus) finished in feedlot. Thirty-two 20-month-old bulls, with initial average weight of 374±25 kg, were kept in individual pens (10 m²). Diets consisted of 50% roughage and 50% concentrate, with an expected 1.80 kg/day weight gain. The experimental design with four diets and eight replications was completely randomized. Different cutting heights, low (25 cm) and high (45 cm), with or without enzyme inoculants, were studied. Live weight, average daily gain, feed intake, feed efficiency, carcass characteristics,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Feed efficiency; Feed intake; Finishing system; Forage conservation; Human health; Meat quality.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000100023

Residual feed intake in beef cattle
Provedor de dados: 96
Autores: Arthur,J P.F.; Herd,R.M.
Providing feed is a major input cost in beef production, hence improvements in the efficiency of feed utilisation will reduce the cost of production. Residual feed intake (RFI) is a measure of feed efficiency, and is defined as the difference between an animal's actual feed intake and its expected feed intake based on its size and growth. It is independent of the level of production, and the lower the value the more efficient the animal is. This paper examines the current state of knowledge on RFI. Available information indicates that postweaning RFI is moderately heritable, and that selection for low RFI will result in progeny that consume less feed for the same level of production as progeny of high RFI cattle. Under ad libitum feeding, RFI is...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cattle; Feed efficiency; Growth; Residual feed intake.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982008001300031

Protein metabolism, feed energy partitioning, behavior patterns and plasma cortisol in Nellore steers with high and low residual feed intake
Provedor de dados: 96
Autores: Gomes,Rodrigo da Costa; Sainz,Roberto Daniel; Leme,Paulo Roberto.
The objective was to evaluate protein turnover, nitrogen balance, feed energy partitioning, behavior patterns and plasma cortisol in Nellore (B. indicus) cattle with high and low residual feed intake (RFI = actual minus expected dry matter intake). Seventy-two Nellore steers (16 to 21 months-old, 334±19 kg initial body weight) were fed a feedlot diet for 70 days ad libitum. Daily dry matter intake (DMI) and average daily gain (ADG) were recorded individually and RFI was calculated. The 12 steers of lowest (Low-RFI, most efficient) RFI and the 12 ones of highest RFI (High-RFI, least efficient) were evaluated with respect to their behavior patterns and plasma cortisol concentration. Urine was collected for determination of daily 3-methylhistidine excretion...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bos indicus; Feed efficiency; Methane; Net feed intake; 3-methyl-histidine; Zebu.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000100007

Feed restriction of F1 Holstein × Zebu cows in the final third of lactation modifies intake, nutrient digestibility, feeding behavior, and performance
Provedor de dados: 96
Autores: Santana,Pedro Felipe; Rocha Júnior,Vicente Ribeiro; Ruas,José Reinaldo Mendes; Monção,Flávio Pinto; Borges,Luana Alcântara; Rigueira,João Paulo Sampaio; Ramos,Joyce Cipriana Pacheco; Gomes,Virgílio Mesquita.
ABSTRACT The objective of this study was to evaluate the effect of quantitative feed restriction level on nutrient intake and digestibility, nitrogen balance, efficiency and feeding behavior, and productive performance of F1 Holstein × Zebu cows in late lactation. Sixty F1 Holstein × Zebu cows were used at the stage of late lactation (183.0±17.5 days of lactation) and with initial body weight (BW) of 499±30 kg. The experimental arrangement adopted was the completely randomized design, with five feed restriction levels (3.39, 2.75, 2.50, 2.25, and 2.00% of BW) and twelve cows as replicates for each treatment. The roughage:concentrate ratio was of 75:25 in the total dry matter of the diet. The restriction of dietary supply from 3.39 to 2.0% of BW linearly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crossbred cows; Feed efficiency; Milk production; Nitrogen balance.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100701

Residual feed intake and hematological and metabolic blood profiles of lle de France lambs
Provedor de dados: 96
Autores: Paula,Edson Ferraz Evaristo de; Souza,Damaris Ferreira de; Monteiro,Alda Lúcia Gomes; Santana,Miguel Henrique de Almeida; Gilaverte,Susana; Rossi Junior,Paulo; Locatelli Dittrich,Rosangela.
The objectives of this study were to estimate the phenotypic correlations of residual feed intake (RFI) and gross feed efficiency (GFE) with hematological and metabolic blood profiles of lambs and to determine the differences for these traits in animals of different RFI classes. Twenty Ile de France male lambs, 115±8 days of age and 31.3±4.1 kg of body weight (means ± SD), were individually housed and their dry matter intake was measured over 65 days. They were weighed every 13 days to determine the average daily weight gain and two blood samples were collected at the last two weighings (at 07h30) for analysis of blood variables. The animals were divided into two classes: negative RFI (most efficient: &lt;0.5 SD below the mean; n = 6) and positive RFI...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Blood biochemistry; Feed efficiency; Hematology; Metabolism; Sheep.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013001100007

Residual feed intake and its effect on carcass and meat characteristics of feedlot Zebu cattle
Provedor de dados: 96
Autores: Ribeiro,Julimar do Sacramento; Gonçalves,Tarcisio de Moraes; Ladeira,Márcio Machado; Campos,Fabrício Rodrigues; Tullio,Rymer Ramiz; Machado Neto,Otávio Rodrigues; Oliveira,Dalton Mendes de; Bassi,Marcelo Silva.
The objective of this study was to evaluate the residual feed intake (RFI) and its relation with performance, carcass and meat characteristics of Zebu animals. A total of 40 Zebu steers with initial age of 18 months and initial live weight of 350 kg were confined in feedlot for 112 days. The average daily gain (ADG) and dry matter intake (DMI) were obtained every 14 days. Residual feed intake was determined by the difference between observed and predicted DMI, based on the metabolic weight and the ADG. Animals were classified into the RFI groups: high (&amp;gt;0.5 standard deviation of the mean - least efficient), medium (±0.5 standard deviation of the mean) and low (&lt;0.5 standard deviation of the mean - most efficient). Daily cost with feeding and per...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Feed efficiency; Meat quality; Performance.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000600027

Feeding behaviors of feedlot bulls fed concentrate levels and babassu mesocarp meal
Provedor de dados: 96
Autores: Cruz,Rossini Sôffa da; Alexandrino,Emerson; Missio,Regis Luis; Neiva,José Neuman Miranda; Restle,João; Melo,Jonahtan Chaves; Sousa Júnior,Antonio de; Resende,José Messias de.
The objective of the present study was to evaluate the feeding behavior of feedlot Nellore bulls fed two levels of concentrate (650 and 710 g/kg dry matter) with or without the inclusion of 350 g babassu mesocarp meal/kg dry matter in the concentrate. Twenty-eight animals at 18 months of initial age and 356.66±19.25 kg initial body weight were used. A completely randomized design was used with treatments in a 2 × 2 factorial arrangement. Increase in concentrate level from 650 to 710 g/kg dry matter did not change the feeding time, of 194.41 and 189.64 minutes/day, respectively. The inclusion of 350 g babassu mesocarp meal/kg dry matter in the concentrate increased the feeding time from 173.92 to 210.12 minutes/day, ensuring similar energy intake in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biofuels; Feed efficiency; Feeding time; Idle; Rumination.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000700024

Narasin inclusion for feedlot lambs fed a diet containing high amounts of ground flint corn
Provedor de dados: 63
Autores: Polizel,Daniel Montanher; Marques,Samuel Sutil; Westphalen,Mariana Fontana; Gouvea,Vinícius Nunes; Ferraz Júnior,Marcos Vinícius de Castro; Miszura,Alexandre Arantes; Barroso,José Paulo Roman; Limede,Arnaldo Cintra; Ferreira,Evandro Maia; Pires,Alexandre Vaz.
ABSTRACT: Narasin is an antibacterial agent that may change rumen fermentation. Two experiments were proposed to evaluate the efficiency of narasin inclusion for lambs fed a diet containing high amounts of ground flint corn. Thirty rumen-cannulated wethers were used to evaluate nutrient digestibility, nitrogen balance, and rumen metabolism (Exp. 1); and forty-five lambs were used to evaluate performance (Exp. 2) of animals fed with narasin for high flint corn diets. The experimental diets were: control or basal diet without additives (C); 25 mg of monensin kg−1 of dry matter (DM) (M); and inclusion of 5 (N5), 10 (N10), and 15 (N15) mg of narasin kg−1 of DM. The statistical analyses were performed using the MIXED procedure of SAS. Monensin increased DM...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Average daily gain; Feed efficiency; Propionate; Rumen metabolism; Sheep.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000600401

Low doses of monensin for lambs fed diets containing high level of ground flint corn
Provedor de dados: 63
Autores: Polizel,Daniel Montanher; Martins,André Storti; Miszura,Alexandre Arantes; Ferraz Júnior,Marcos Vinícius de Castro; Bertoloni,Analisa Vasques; Oliveira,Gabriela Bagio; Barroso,José Paulo Roman; Ferreira,Evandro Maia; Pires,Alexandre Vaz.
ABSTRACT Two experiments were proposed to evaluate the addition of monensin for lambs fed diets containing a high level of mature ground flint corn. The experimental diets were as follows: no inclusion of monensin (M0) and inclusion of 8 (M8), 16 (M16) and 24 mg kg–1 of monensin (M24). In experiment 1, eight cannulated wethers were divided into a double 4 × 4 Latin square experimental design to evaluate nutrient digestibility, plasma parameters and rumen fermentation. The experiment lasted 112 days, divided into four periods of 28 days each. In experiment 2, ninety-two lambs were used in a randomized block design to evaluate the performance over 56 days. In experiment 1, doses of monensin had no effect on nutrient intake (p ≥ 0.07) and digestibility (p ≥...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Feed efficiency; Propionate; Sheep.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000400402

Decoquinate, lasalocid and monensin for starter feeds and the performance of holstein calves to 20 weeks of age
Provedor de dados: 63
Autores: Nussio,Carla Maris Bittar; Huber,John Tal; Nussio,Luiz Gustavo.
The large utilization of coccidiostats in dairy herds has raised the question regards the best product to use, based on better animal performance. Sixty-four Holstein calves were randomly assigned to four treatments at 10 (±4) d of age to evaluate calf performance when fed approved coccidiostats available on the market in Arizona, USA. Calves received a dry calf starter without (control) or with one of the following coccidiostats: lasalocid, 30 mg kg-1; decoquinate, 19 mg kg-1; and monensin, 30 mg kg-1. Calves received 3.6 kg d-1 of a commercial 22% CP:20% fat milk replacer until 6 wk of age. Calves were offered starter "ad libitum" up to 2 kg d-1, and calves had free access to water throughout the trial. Alfalfa hay was offered "ad libitum" after weaning....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coccidiostats; Feed efficiency; Growth; Ionophore; Weight gain.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000300002

Effects of melamine and urea formaldehyde contamination in nile tilapia (Oreochromis niloticus) diets on growth performance, economic loss and toxicity appearance characteristic index
Provedor de dados: 106
Autores: Aruneepong Srisathaporn; Jowaman Khajarern; Prapas Chalorkpunrut; Bundit Tengjroenkul.
A study was performed to evaluate the effects of melamine (Me) and urea formaldehyde (UF) combinations in diets on growth performance, and characterization of toxicity appearance. The combinations of three levels of Me and UF (0.5, 1.0 and 2.0%) were conducted with one control (no addition) in a completely randomized design (CRD). Four hundred and eighty mixed-sex fish with the initial weight of 9.67±0.03 g were assigned to 10 dietary treatments with 3 replications and fed for 6 weeks. No interaction was observed between Me and UF in this study. However, significant differences (P&lt;0.05) in growth performance, feed efficiency and survival rate (SR) between the control and the fish fed with Me and UF combinations were observed. The body weight (BW) and...
Tipo: PhysicalObject
Palavras-chave: Nile tilapia; Oreochromis niloticus; Melamine; Urea formaldehyde; Histology; Production index; Microscope; Growth performance; Toxicity; Feed efficiency; Survival rate; Diet contamination; ปลานิล; เมลามีน; ยูเรียฟอร์มัลดีไฮด์; สารเสริมอาหาร; ดัชนีผลผลิต; กล้องจุลทรรศน์; สมรรถนะการผลิต; การเจริญเติบโต; ประสิทธิภาพการใช้อาหาร; อัตราการรอดตาย; การปนเปื้อน; จุลพยาธิวิทยา.
Ano: 2013
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5766

Effect of early feed restriction on body weight and compensatory growth in Label Rouge broiler chickens
Provedor de dados: 109
Autores: Morais,Bianca Corrêa de; Netto,Daniel Araújo; Alves,Julia Rodrigues; Lima,Heder José D'Avila.
Abstract This research was conducted to assess the compensatory gain in birds that have suffered severe food restriction and a reduced growth in its initial phase. A total of 144 birds were used in the Label Rouge lineage with average initial weight 239.90 ± 76.80 g, from 28 to 49 days. The experimental design used was a completely randomized design, where the birds were distributed in 18 boxes, containing 3 treatments and 6 replicates of 8 birds per cage. The treatments were as follows: birds with body weight of 150.73 ± 12.62 g, between weighing from 239.79 ± 13.14 g and heavy weight of 329.17 ± 24.89 g in different periods, from 28 to 35, 35 to 42 and 42 to 49 days of age, respectively. In relation to weight gain, the heavy birds, obtained better...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Consumption; Feed efficiency; Poultry; Severe restriction.
Ano: 2017
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122017000400606

Feeding behavior of dairy cows in feedlot and fed on crude glycerin levels in the diet
Provedor de dados: 2
Autores: Meneses, Murilo de Almeida; Universidade Estadual do Sudoeste da Bahia; Silva, Fabiano Ferreira da; Universidade Estadual do Sudoeste da Bahia; Schio, Alex Resende; Universidade Estadual do Sudoeste da Bahia; Silva, Robério Rodrigues; Universidade Estadual do Sudoeste da Bahia; Souza, Dicastro Dias de; Universidade Estadual do Sudoeste da Bahia; Porto Junior, Antônio Ferraz; Universidade Estadual do Sudoeste da Bahia.
Current experiment evaluated the inclusion effect of crude glycerin levels in the diet on the feeding behavior of confined dairy cows. Fifteen crossbred Holsteinx Zebu cows were used, divided into three 5 x 5 Latin squares, with treatments: control (no addition of glycerin) and inclusion of 50, 100, 150 and 200 gcrude glycerin per kg of dry matter (DM) in the diet. The animals were subjected to five visual assessments of feeding behavior for 24 hours in each period. Linear increase on feeding time and rumination and on decrease of idle time with the inclusion of crude glycerin levels (p &amp;lt; 0.05) was reported. There was a linear effect on consumption of dry matter and neutral detergent fiber (NDF) corrected for ash and protein (NDF); a similar effect...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.04.00.00-2; 5.04.03.00-1 feeding; Visual assessment; Feed efficiency; Leisure; Rumination.
Ano: 2014
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/21488

Effect of nutritional density and season on the performance of young rabbit does before the first mating - doi: 10.4025/actascianimsci.v35i4.19101
Provedor de dados: 2
Autores: Teixeira, Paulo Sergio dos Santos; Universidade Estadual Paulista “Júlio de Mesquita Filho”; Wechsler, Francisco Stefano; Universidade Estadual Paulista “Júlio de Mesquita Filho”; Moura, Ana Silvia Alves Meira Tavares; Universidade Estadual Paulista “Júlio de Mesquita Filho”.
The objective was to evaluate the effect of nutritional density and season on the performance of young rabbit does before the first mating. Forty-eight females from the Botucatu Genetic Group were used in each season (warm or cool), starting at the age of 70 days, housed in groups of four per cage up to 119 days, and reared individually from 120 to 140 days of age. The high-density diet was formulated to contain, on a 90% DM basis, 18.4% CP, 16.5% ADF and 2,500 kcal DE kg-1; whereas the low-density diet was formulated to contain 14.7% CP, 24% ADF and 2,000 kcal DE kg-1. The experiment was conducted according to a 2x2 factorial design (two diets x two seasons) with repeated measures (weeks). The high-density diet promoted lower feed intake, higher final...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.04.03.00-1 acid detergent fiber; Feed efficiency; Feed intake; Growth; Live weight; Nutrition acid detergent fiber; Feed efficiency; Feed intake; Growth; Live weight; Nutrition.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/19101

Feeding behavior of lactating cows fed palm kernel cake in the diet
Provedor de dados: 2
Autores: Pimentel, Leidiane Reis; Silva, Fabiano Ferreira da; Silva, Robério Rodrigues; Schio, Alex Resende; Rodrigues, Eli Santana de Oliveira; Oliveira, Paulo Andrade de.
This study aimed to evaluate the effect of including of palm kernel cake on feeding behavior of lactating crossbred cows. Twelve crossbred Holstein x Zebu cows were distributed in three 4 x 4 latin squares, with the following treatments: control; inclusion of 5%; inclusion of 10%; inclusion of 15% palm kernel cake in the diet dry matter. The animals were observed during four periods as to feeding behavior, 24 hours in each period. There was no effect of inclusion of palm kernel cake (p &gt; 0.05) on time spent on eating, ruminating and idling. The feeding efficiencies of dry matter and corrected neutral detergent fiber, total digestible nutrients, and the rumination efficiency of corrected neutral detergent fiber were not influenced (p &gt; 0.05). There...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Behavioral activities; Feeding; Feed efficiency; Dry matter; Idle; Rumination.
Ano: 2015
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/23391

Avaliação do consumo alimentar residual em touros jovens da raça Nelore Mocho em prova de desempenho animal - DOI: 10.4025/actascianimsci.v30i4.6464
Provedor de dados: 2
Autores: Bonin, Marcio de Nadai; UEL; Demarchi, João José Assumpção de Abreu; Agência Paulista de Tecnologia dos Agronegócios; Mizubuti, Ivone Yurika; UEL; Ribeiro, Edson Luis de Azambuja; UEL; Manella, Marcelo de Queiroz; Instituto de Zootecnia; Pereira, Elzânia Sales; UFC.
Este trabalho avaliou as características: idade, peso, ganho de peso diário (GPD), ingestão de matéria seca (IMS), conversão alimentar (CA), eficiência alimentar (EA) e consumo alimentar residual (CAR) de tourinhos da raça Nelore Mocho em prova de desempenho animal (PDA). Foram utilizados 30 animais, inteiros, com idade inicial de 243,6±30,4 dias. Alimentos e sobras individuais foram quantificados diariamente. A classificação baseou-se no índice de prova de desempenho animal (IPDA). Para CAR não houve diferença (p &gt; 0,05) entre a média dos grupos. As variáveis peso e GPD não foram correlacionadas com CAR. Houve alta correlação entre CAR e CA. EA e CA apresentaram correlação com CAR. O IPDA apresentou alta correlação com a IMS (r = 0,75). Comparado o CAR...
Palavras-chave: 5.04.03.00-1 Nutrição e Alimentação Animal bovinos de corte; Eficiência alimentar; Melhoramento; Seleção. beef cattle; Feed efficiency; Improve; Selection.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/6464

Automatic feeders for Nile tilapia raised in cages: productive performance at high feeding frequencies and different rates
Provedor de dados: 45
Autores: Oliveira,F.A.; Argentim,D.; Novelli,P.K.; Agostinho,S.M.M.; Agostinho,L.M.; Agostinho,C.A.
ABSTRACT The main goal of modern intensive fish farms should be to increase productivity at a low cost. The automation of fish feeding plays an important role in this scenario since it may improve feed efficiency and reduce organic waste emissions. The aim of this experiment was to provide basic information for the development of feeding techniques using automatic feeders. The experiment was done from September to December, with tilapia weighing 185g, fed 48 meals a day at 22 or 30 minute intervals, with feeding rates of 2, 3 and 4% of live weight. Eighteen 1m3 net cages equipped with automatic feeders were distributed in one pond. During the experimental trial the mean values for dissolved oxygen, pH and temperature were 3.20mg/l, 8.03 and 25.43°C,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Automatic feeding; Feeding management; Oreochromis niloticus; Feed efficiency; Carcass indexes.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000300702

Carcass quality of buffalo (Bubalus bubalis) finished in silvopastoral system in the Eastern Amazon, Brazil
Provedor de dados: 45
Autores: Peixoto,M.R.S.; Lourenço Junior,J.B.; Faturi,C.; Garcia,A.R.; Nahúm,B.S.; Lourenço,L.F.H.; Meller,L.H.; Oliveira,K.C.C.
The influence of the diet on the quality of buffalo (Bubalus bubalis) carcasses of crossbred Murrah and Mediterranean, concentrate fed on traditional (corn/soybean) or on agro-industrial residues (palm oil and coconut cakes) was studied. The animals were sacrificed in a slaughterhouse, and physical and physical-chemical analyses in the carcasses were carried out after 24 hours, and instrumental color and texture analyses of the Longissimus dorsi were carried out 48 hours after cooling. The animals supplemented with palm oil cake had better carcass conformation and fat trim, and differences (P&lt;0.05) in the percentage of fat in the carcass fat thickness and coverage were observed.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Buffalo; Feed efficiency; Agroforestry systems; Oil palm cake; Coconut cake.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352012000400034

Effects of Yucca Extract on Feed Efficiency, Immune and Antioxidative Functions in Broilers
Provedor de dados: 52
Autores: Su,Jun-Ling; Shi,Bin-Lin; Zhang,Peng-Fei; Sun,Deng-Sheng; Li,Ti-Yu; Yan,Su-Mei.
Effects of yucca extract (YE) on feed efficiency, immune and antioxidative function in Arbor Acres broilers were studied. One hundred and twenty-eight fourteen-day-old broiler chickens were randomly divided into four treatments with four replicates of 8 birds each. These four diets were formulated by adding 0, 100, 200 and 300 mg/kg YE to the basal diet. The results showed that: diets supplemented with 100 and 200 mg/kg YE increased average body weight gain, feed efficiency, IgG, IgM, T-AOC, CAT and SOD levels, and have positive effects on inducing immune organs' maturation. In addition, 100 mg treatment mainly improved the feed efficiency whereas 200 mg treatment mainly acted on immunity and anti-oxidation. In conclusion, YE can be used as a feed additive...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Yucca product; Chicken; Feed efficiency; Immunity; Antioxidant.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100504

Genetic analysis of residual feed intake adjusted for fat and carcass and performance traits in a Nellore herd
Provedor de dados: 65
Autores: Moraes,Giovanna Faria de; Abreu,Luiza Rodrigues Alves; Ferreira,Isabel Cristina; Pereira,Idalmo Garcia.
ABSTRACT: The study of the genetic evaluation of residual feed intake adjusted for fat (RFIFat) is important for the appropriate use of feed efficiency in selection programs. The objective was to analyze the influence of selection for RFIF at on carcass and performance traits by estimating various genetic parameters. Data were analyzed from five tests of feed efficiency, which were conducted with 677 Nellore males. Genetic evaluation was performed by Bayesian inference using an animal model via single- and two-trait analyses. Variables analyzed were dry matter intake, average daily gain, RFIFat, rib eye area, back fat thickness, rump fat thickness, marbling score, and subcutaneous fat thickness. The posterior mean distributions estimated at each analysis...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Back fat thickness; Feed efficiency; Genetic correlation; Heritability.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000200651