Consulta: subjectFacets:"Feed conversion ratio"
Registros recuperados: 18
Data/hora: 10/06/2024 15:10:28

Economic values of growth and feed efficiency for fish farming in recirculating aquaculture system with density and nitrogen output limitations: a case study with African catfish (Clarias gariepinus)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Besson, M.; Komen, H.; Aubin, J.; De Boer, I. J. M.; Poelman, M.; Quillet, Edwige; Vancoillie, C.; Vandeputte, Marc; Van Arendonk, J A M.
In fish farming, economic values (EV) of breeding goal traits are lacking, even though they are key parameters when defining selection objectives. The aim of this study was to develop a bioeconomic model to estimate EV of 2 traits representing production performances in fish farming: the thermal growth coefficient (TGC) and the feed conversion ratio (FCR). This approach was applied to a farm producing African catfish (Clarias gariepinus) in a recirculating aquaculture system (RAS). In the RAS, 2 factors could limit production level: the nitrogen treatment capacity of the biofilter or the fish density in rearing tanks at harvest. Profit calculation includes revenue from fish sales, cost of juveniles, cost of feed, cost of waste water treatment, and fixed...
Tipo: Text
Palavras-chave: Economic values; Feed conversion ratio; Fish farming; Recirculating aquaculture system; Selective breeding; Thermal growth coefficient.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00245/35593/34277.pdf

Quantifying the genetic parameters of feed efficiency in juvenile Nile tilapia Oreochromis niloticus
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: De Verdal, Hugues; Vandeputte, Marc; Mekkawy, Wagdy; Chatain, Beatrice; Benzie, John A. H.
Background: Improving feed efficiency in fish is crucial at the economic, social and environmental levels with respect to developing a more sustainable aquaculture. The important contribution of genetic improvement to achieve this goal has been hampered by the lack of accurate basic information on the genetic parameters of feed efficiency in fish. We used video assessment of feed intake on individual fish reared in groups to estimate the genetic parameters of six growth traits, feed intake, feed conversion ratio (FCR) and residual feed intake in 40 pedigreed families of the GIFT strain of Nile tilapia, Oreochromis niloticus. Feed intake and growth were measured on juvenile fish (22.4g mean body weight) during 13 consecutive meals, representing 7days of...
Tipo: Text
Palavras-chave: Feed conversion ratio; Tilapia; Heritability; Genetic estimations; Correlations.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00469/58115/60551.pdf

Combining Individual Phenotypes of Feed Intake With Genomic Data to Improve Feed Efficiency in Sea Bass
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Besson, Mathieu; Allal, Francois; Chatain, Beatrice; Vergnet, Alain; Clota, Frederic; Vandeputte, Marc.
Measuring individual feed intake of fish in farms is complex and precludes selective breeding for feed conversion ratio (FCR). Here, we estimated the individual FCR of 588 sea bass using individual rearing under restricted feeding. These fish were also phenotyped for their weight loss at fasting and muscle fat content that were possibly linked to FCR. The 588 fish were derived from a full factorial mating between parental lines divergently selected for high (F+) or low (F–) weight loss at fasting. The pedigree was known back to the great grand-parents. A subset of 400 offspring and their ancestors were genotyped for 1,110 SNPs which allowed to calculate the genomic heritability of traits. Individual FCR and growth rate in aquarium were both heritable...
Tipo: Text
Palavras-chave: Aquaculture; Feed conversion ratio; Fine phenotyping; Genomic selection; Individual feed intake; Restricted feeding; Selective breeding.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00486/59799/62927.pdf

Improving feed efficiency in fish using selective breeding: a review
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
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

Feed intake and growth performance of goats supplemented with soy waste
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Rahman,Mohammad Mijanur; Nakagawa,Toshinori; Abdullah,Ramli Bin; Embong,Wan Khadijah Wan; Akashi,Ryo.
The objective of this work was to evaluate the effects of supplemental feeding of soy waste on the feed intake and growth rate of goats. Twenty male crossbred (Boer x local) goats were assigned to two isonitrogenous diet groups: one of commercial pellet and the other of soy waste. The commercial pellet (1.0%) and soy waste (0.8%) were provided on the dry matter basis of body weight (BW) per day, to the respective group of each diet. The soy waste group had lower daily intakes of total dry matter (0.79 vs. 0.88 kg) and organic matter (665.71 vs. 790.44 g) than the group fed pellet; however, the differences on daily intakes for grass (0.62 vs. 0.64 kg), crude protein (96.81 vs. 96.83 g), and neutral detergent fibre (483.70 vs. 499.86 g) were not significant....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pennisetum purpureum; Commercial pellet; Crude protein; Feed conversion ratio; Neutral detergent fibre.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014000700554

Production Performance and Economic Appraisal of Broiler Farms in Anand District of Gujarat
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Shaikh,   A.S.; Zala,   Y.C.
The production performance of different sizes of broiler farms has been studied by collecting data from 60 broiler producers of Anand district during 2005. To examine production performance, the average feed conversion ratio, livability percentage, average body weight and age at marketing have been worked out. Though broiler production is capital-intensive, it has been found profitable. The average cost of production per broiler has been found to be ` 64 and per kilogram live weight of broiler as ` 32. The variable cost and fixed cost constitute 84.5 per cent and 15.5 per cent of total cost, respectively. The major cost components have been found as feed cost (58.6%), chick cost (21.5%) and depreciation on buildings (10.7%). The net profit per broiler as...
Tipo: Article
Palavras-chave: Broiler farms; Feed conversion ratio; Livability percentage; Benefit-cost ratio; Break-even analysis; Agricultural and Food Policy; Q120; Q130.
Ano: 2011
URL: http://purl.umn.edu/119385

Effect of dietary phytase suplementation on the performance, bone densitometry, and phosphorus and nitrogen excretion of broilers
Provedor de dados: Revista Brasileira de Ciência Avícola
Autores: Assuena,V; Junqueira,OM; Duarte,KF; Laurentiz,AC; Filardi,RS; Sgavioli,S.
This experiment was carried out to evaluate the effects of the inclusion of different levels of phytase on broiler performance, bone densitometry, and phosphorus and nitrogen excretion. Nine hundred and sixty one-day old broilers, 50% males and 50% females, were distributed in a completely randomized experimental design into five treatments and six replicates 32 birds each. The treatments consisted of a control diet and four diets with the addition 25, 50, 75, and 100 g/ ton of phytase (250, 500, 750 and 1000 FTU of phytase/kg fed). Diets were formulated to contain equal nutritional levels, and considered the phytase product nutritional levels. In general, the addition of phytase resulted in a linear decrease in broiler performance. However, the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bone mineralization; Feed conversion ratio; Feed intake; Weight gain.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2009000100005

Dietary Levels of Zinc and Manganese on the Performance of Broilers Between 1 to 42 Days of Age
Provedor de dados: Revista Brasileira de Ciência Avícola
Autores: Pacheco,BHC; Nakagi,VS; Kobashigawa,EH; Caniatto,ARM; Faria,DE; Faria Filho,DE.
ABSTRACT The objective of this study was to determine the optimal dietary concentration of zinc and manganese on the performance characteristic and the requirement of these trace minerals derived from organic sources for broilers from 1 to 42 days of age. In experiment 1, zinc was evaluated, whereas manganese was evaluated in experiment 2. In each experiment, 320 males chicks were distributed in iron mesh metabolic cages (0.9m x 0.7m x 0.5m), according to a completely randomized experimental design in eight treatments with five replicates of eight birds each. In experiment 1, zinc sulfate was included at 0,60 and 100mg/kg and zinc methionine at 20, 40, 60, 80 and 100mg/kg. In experiment 2, manganese sulfate was added at 0, 65 and 105mg/kg and manganese...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Avian; Feed conversion ratio; Nutrition; Requirements; Trace minerals.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000200171

Broiler-Housing Conditions Affect the Performance
Provedor de dados: Revista Brasileira de Ciência Avícola
Autores: Mesa,D; Muniz,E; Souza,A; Geffroy,B.
ABSTRACT In the last decades animal production has considerably increased worldwide to sustain an ever-growing human population. Among animal reared for consumption purposes, chickens are undoubtedly one of the most successful, mainly due to their rapid growth rate. The development of broiler farming has been accompanied in recent years by a substantial attention to animal welfare. This study is aimed at assessing the effects of different housing conditions on both feed conversion ratio and mortality of male broiler flocks through a large-scale study (more than 100 million birds) involving 977 farms belonging to one major producer. For this, we evaluated nine features of the housing system using a linear model with random effect. The features were:...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chickens; Sheds; Feed conversion ratio; Mortality; Welfare.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000200263

Digestible Lysine on Live Performance of Chicken Type Naked Neck During the Starter Phase
Provedor de dados: Revista Brasileira de Ciência Avícola
Autores: Oliveira,RG de; Pinheiro,SRF; Castro,MR de; Vieira,DJ; Pires,AV; Abreu,LRA de.
ABSTRACT The poultry market has changed due to a higher consumer interest on products with differentiated organoleptic characteristics, making of free-range broiler production a promising activity. This experiment was conducted to determine the digestible lysine requirements of Redbro Cou Nu male and female chickens during the starter phase (one to 21 days of age). Six hundred and thirty Redbro Cou Nu broilers were distributed into 30 pens (21 chickens/pen) according to a randomized complete design in a 5 x 2 factorial arrangement, consisting of five levels of digestible lysine and two sexes, with three replicates (pens) per treatments. Diets with increasing digestible lysine levels (8.1, 9.5, 10.9, 12.3 and 13.7 g of digestible lysine per kg of diet) were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amino acid; Feed conversion ratio; Ideal protein; Nutritional requirement.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000400483

Live Performance, Carcass, and Bone Quality Responses of Grower and Finisher Broilers to Dietary Metabolizable Energy Levels
Provedor de dados: Revista Brasileira de Ciência Avícola
Autores: Gopinger,E; Krabbe,EL; Surek,D; Lopes,LS; Avila,VS.
ABSTRACT Broiler energy nutrition has attracted attention due to its economic importance, particularly during the rearing period of 22-42 days of age. There are many evidences that broilers changed their feed intake capacity due to genetic selection, especially when good quality pellets are fed, which suggests that modern broiler strains may achieve good performance when fed low metabolizable energy levels. The objective was to evaluate the energy efficiency, performance parameters, bone parameters, and carcass yield of 22- to 42-d-old broilers fed diets with energy levels below or above their requirements, while maintaining the density of all other nutrients. In total, 900 male broilers were distributed in a randomized block design, with five treatments...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bone; Carcass; Energy efficiency; Feed conversion ratio; Feed intake.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000400559

Application of the first canonical variable in the evaluation of animal production trials
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Detmann,Edenio; Cecon,Paulo Roberto; Andreotti,Marcelo de Oliveira; Resende,Flávio Dutra de; Sousa,Daniel de Paula; Ponciano,Niraldo José; Campos,José Maurício de Souza; Souza,Paulo Marcelo de; Vittori,Andrea.
The objective of this work was to evaluate the inter treatment discrimination according to feed conversion efficiency in several animal performance experiments. The variables investigated were: feed conversion ratio (FCR = intake: production ratio), feed efficiency index (FEI = production: intake ratio) and bio-nutritional index (BNI). The BNI was constructed from the first canonical variable obtained based on the multivariate analysis of variance of the intake and animal production (weight gain or milk production) variables. The results indicated that FCR and FEI reciprocated each other at experimental plot level but did not reciprocate at animal group or treatment level. This fact implicates distortions on the descriptive levels of probability of type I...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bio-nutritional index; Cattle; Feed conversion ratio; Feed efficiency index; Multivariate statistical analysis; Poultry.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982005000700030

The economic impact of infection with Eimeria spp. in broiler farms from Romania
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Györke,Adriana; Kalmár,Zsuzsa; Pop,Loredana Maria; Şuteu,Ovidiu Loan.
ABSTRACT A survey was conducted on chicken broiler farms from Romania in August-November 2010 to evaluate economic losses due to coccidiosis. Data were collected from six broiler farms of different capacity regarding chemoprophylaxis program, weight gain, feed conversion, and mortality, for two previous flocks in two houses of each farm, and finally we evaluated the economic losses. Also, faeces samples were collected and oocysts were classified according to their size, and virulence of each Eimeria spp. field isolate was determined by lesion scoring. Correlations between economic performance, oocysts category, and virulence of Eimeria were assessed by multiple linear regression. Total economic losses per 24 flocks of 18,000 chicks each were about...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Body weight gain; Chickens; Feed conversion ratio; Losses.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016000500273

Effect of supplementing finishing pigs with different sources of chromium on performance and meat quality
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Peres,Louise Manha; Bridi,Ana Maria; Silva,Caio Abércio da; Andreo,Nayara; Barata,Cátia Chilanti Pinheiro; Dário,Julie Gabriela Nagi.
The objective was to evaluate the dietary supplementation of different sources of chromium (inorganic: chromium sulfate and chelated: chromium-methionine) during the finishing period of pigs to obtain improvements in the animal performance, and carcass and meat quality. The statistical design was randomized blocks, where 44 barrows, with an initial weight 60.49±5.12 kg, were divided into four blocks (heavier, heavy, light and lighter) according to initial weight. The experimental diets were isoenergetic and isonutrient, except for the chromium level. The treatments were divided as follows: control (without chromium), control + 200 ppb of inorganic chromium (chromium sulfate), and control + 200 ppb of chelated chromium (chromium-methionine). In the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chromium-methionine; Daily weight gain; Feed conversion ratio; Glucose; Inorganic chromium; Lipid oxidation.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000700369

ประสิทธิภาพของอิมัลซิไฟเออร์ภายนอกต่อสมรรถนะการผลิตและคุณภาพซากของไก่เนื้อ
Provedor de dados: Thai Agricultural Research Repository
Autores: Sukanya Phonpalert; Nattanan Saenthaweesuk; Songsak Chumpawadee; Jowaman Khajarern.
The objective of this study was to determine the effects of an exogenous emulsifier on performance and carcass traits of broiler. The exogenous emulsifier (sodium strearoyl-2-lactylate) was added 0.05% to the 3 levels reduction (0.70, 1.00 and 1.30 %) rice bran oil from control diets. The results showed that body weight gain, feed intake, feed conversion ratio, survival rate, productive index and feed cost/kg BW (FCG) were similar to the added emulsifier and control fed groups for 3 periods of testing (1-21, 22-35 and 36-42d of age). However, over period of 1-42 d of age, birds fed with exogenous emulsifier 0.05% to 0.07% reduction rice bran oil from control diets showed improvement and better (P&lt;0.05) FCR and showed higher (P&lt;0.05) than no added...
Tipo: PhysicalObject
Palavras-chave: Broiler chicken; Supplemention; Emulsifier; Sodium strearoyl-2-lactylate; Growth performance; Production performance; Feed conversion ratio; Carcass quality; ไก่เนื้อ; การให้อาหารเสริม; โซเดียมสเตียรออิล 2 แลคทิเลส; อิมัลซิไฟเออร์; สารเสริม; เอนไซม์ไลเปส; การไฮโดรไลซ์; กรดไขมัน; โมโนกลีเซอไรด์; สมรรถนะการผลิต; อัตราการเปลี่ยนอาหารเป็นน้ำหนัก; คุณภาพซาก.
Ano: 2013
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5787

ประสิทธิภาพของกรดอินทรีย์ต่อสมรรถนะการผลิตและคุณภาพซากในไก่เนื้อ
Provedor de dados: Thai Agricultural Research Repository
Autores: Dungjai Jongtamklang; Nattanan Saenthaweesuk; Anut Chantiratikul; Jowaman Khajarern.
The effects of organic acid (double-coated calcium butyrate base supplement) on performance and carcass traits of broiler chickens were assessed in three groups (PC, NC1 and NC2). The organic acid was added in three phases of feeding (1-21d, 22-35d, 36-42d) in PC, NC1 (PC deduction 40 kcal ME/kg and both methionine and lysine 1.5%) and NC2 (PC deduction 60 kcal ME/kg and both methionine and lysine 2.2%). Organic acid was added in PC with three period dosages 750-500-500 ppm and in both NC1 and NC2 1000-750-750 ppm. Addition organic acid in three controls (PC, NC1, NC2) showed similar performance of body weight gain, survival rate, feed conversion ratio and productive index, except for early starter period (1-21d of age). Broilers fed with organic acid...
Tipo: PhysicalObject
Palavras-chave: Broiler chicken; Supplemention; Organic acid; Additive; Digestibility; Nutrient absorption; Production performance; Feed conversion ratio; Carcass quality; ไก่เนื้อ; การให้อาหารเสริม; กรดอินทรีย์; สารเสริม; ประสิทธิภาพการย่อย; การดูดซึมสารอาหาร; ค่าความเป็นกรดด่าง; สมรรถนะการผลิต; อัตราการเปลี่ยนอาหารเป็นน้ำหนัก; คุณภาพซาก.
Ano: 2013
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5781

Relationships between residual feed intake and feedlot performance, profitability, and carcass traits in Brahman cattle
Provedor de dados: Arquivo Brasileiro de Medicina Veterinária e Zootecnia
Autores: Favero,R.; Mizubuti,I.Y.; Gomes,R.C.; Ribeiro,E.L.A.; Pereira,E.S.; Prado-Calixto,O.P.P.; Massaro Júnior,F.L.; Santos,A.P.S.
ABSTRACT The present study aimed to evaluate the feedlot performance, profitability and carcass traits of Brahman bulls classified according to the residual feed intake (RFI). Twenty-four bulls (19-month old, 370±34kg live weight) were housed in individual pens for 54 days and had the daily feed intake (observed dry matter intake, DMIobs; DMI % live weight, LW) and average daily gain (ADG) measured. Ultrasound carcass evaluations were performed at the initial and final weighings, when measurements were taken of Longissimus dorsi area, ratio, Longissimus and Biceps femoris fat thickness. The animals were ranked and divided into high (&gt;+0.5 standard deviation; SD), medium (between ±0.5 SD from the mean), and low (&lt;-0.5 SD) RFI groups. Low-RFI animals...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bos indicus; Feed conversion ratio; Musculature; Phenotype.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000200525

Performance of broiler chickens at pre starter and starter phases using diets with different metabolizable energy values of ingredients, at different ages
Provedor de dados: Ciência Rural
Autores: Schneiders,José Luiz; Nunes,Ricardo Vianna; Savoldi,Thaís Lorana; Borsatti,Liliane; Schöne,Rodrigo André; Frank,Rafael; Bayerle,Douglas Fernando; Silva,Idiana Mara da.
ABSTRACT: The experiment was carried out to evaluate the performance of broilers in 1-7 and 8-21 days of age, using metabolizable energy values of corn, soybean meal and soybean oil previously determined for each phase in another metabolism trial. Two trails were conducted, divided into phases according to ages: pre-starter (1-7 days) and starter (8-21 days). At each trial were used 924 broiler chicken randomly distributed into 42 experimental units in a completely randomized design with six treatments and seven replications. Treatments consisted of five diets using the values of apparent metabolizable energy corrected for nitrogen balance of corn, soybean meal and soybean oil determined in different metabolism trials, and one diet with the metabolizable...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Energetic coefficients; Feed conversion ratio; Feed intake; Weight gain.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001001846