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C. Jill Stowe - One of the best experts on this subject based on the ideXlab platform.
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Determinants of Weanling Thoroughbred Auction Prices
Journal of Agricultural and Applied Economics, 2018Co-Authors: Charlotte R. Hansen, C. Jill StoweAbstract:Determinants of prices of 1,302 weanling Thoroughbreds sold at the 2010 November Breeding Stock Sale at the Keeneland Association, Inc. are investigated. Weanlings, who are less than one-year-old, are of unknown breeding and racing quality; still, prices at auctions display high variability. A hedonic price analysis is utilized to identify the determinants of weanling sales prices, and the corresponding marginal values of those determinants are estimated. Prices were highly responsive to variables related to pedigree quality, including the sire’s stud fee, whether the sire was relatively new in his breeding career or not, and whether the dam or the dam’s progeny had earned black type. In addition, prices were influenced by individual characteristics such as gender, age, state of birth. The weanling’s placement in the sale and pinhooked Weanlings also influenced price. Results can be used as a decision tool by both buyers and sellers.
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Determinants of Weanling Thoroughbred Auction Prices
2016Co-Authors: Charlotte R. Hansen, C. Jill StoweAbstract:Determinants of the prices of weanling Thoroughbreds sold at the 2010 November Breeding Stock Sale at the Keeneland Association, Inc. are investigated. A cross-sectional dataset of 1,343 Weanlings are used who were for sale at this auction. Weanlings, whose quality and racing potential is unknown, often have hammer prices at auctions that range from low to high prices, but this can also be reflected by the market at a given time. Even Weanlings whose reserve price is not met at an auction, the highest bidding price reveals something about the market and the quality of that weanling based on certain determinants. But what determinants drive weanling prices in which they have yet to prove themselves in any way, but buyers are willing to buy at a low or a high price. By using hedonic price analysis, the determinants of weanling sales prices can be identified and the corresponding marginal values of those determinates estimated. Weanlings who have a sire that is successful in the breeding shed, and a dam that won graded races, as well as her progeny that won graded races, influence the price of a weanling positively. Results of this study aids sellers in the decision-making process of valuing their Weanlings and, perhaps, deciding whether to enter them in the sale. Additionally, this information can be used to inform buyers in their ability to fairly value their purchase of a weanling.
Valdomiro Shigueru Miyada - One of the best experts on this subject based on the ideXlab platform.
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Rice oil as a soybean oil replacement in weanling pig diets
Livestock Science, 2020Co-Authors: Maicon Sbardella, Bernardo Berenchtein, Carla De Andrade, Danilo Do Prado Perina, V.v. Almeida, Valdomiro Shigueru MiyadaAbstract:The motivation for including oils in the diets of weanling pigs is to increase dietary energy density to meet the pigs' energy requirements. The purpose of this study was to determine the digestible and metabolizable energy values of semi-refined rice oil (RO) and refined soybean oil (SO) for weanling pigs (Experiment 1), as well as to evaluate how replacing SO with RO in weanling pig diets affects performance, intestinal histology, organ morphometry and the occurrence of diarrhea (Experiment 2). In Experiment 1,21 barrows, averaging 19.63 +/- 0.37 kg body weight (BW), were used in a randomized complete block design experiment, with seven replications per treatment and one pig per experimental unit (metabolism cage). The treatments consisted of a reference diet and two test diets. The test diets were obtained by using 90% of the reference diet and 10% of RO or SO. The experimental period consisted of a 7 days adaptation period, followed by a 5 days collection period of feces and urine. The values of the apparent digestible energy, apparent metabolizable energy and N-corrected apparent metabolizable energy of the oils were, respectively, 26.24, 25.78 and 26.01 MJ kg(-1) for RO and 31.74, 31.35 and 31.51 MJ kg(-1) for SO. In Experiment 2, 120 weaned pigs, castrated males and females, averaging 6.74 +/- 0.42 kg BW, were used in a randomized complete block design experiment, with eight replications per treatment and three pigs per experimental unit (pen) to evaluate the effects of five replacement levels of SO with RO in isonutritive weanling pig diets. The treatments were as follows: 4:0 basal diet with 4% of SO; 3:1 basal diet with 3% of SO and 1% of RO; 2:2 basal diet with 2% of SO and 2% of RO; 1:3 basal diet with 1% of SO and 3% of RO; and 0:4 basal diet with 4% of RO. No effects of the replacement levels were observed in the weanling pigs' performance, organ morphometry or in their occurrence of diarrhea. However, a quadratic effect on the villus width and a cubic effect on the villus height:crypt depth ratio were observed in the duodenum. Therefore, if the determined values of energy are used in the feed formulation, refined soybean oil can be replaced with semi-refined rice oil in weanling pig diets without affecting their growth performance. (C) 2011 Elsevier B.V. All rights reserved.Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP
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Rice oil as a soybean oil replacement in weanling pig diets
Livestock Science, 2012Co-Authors: Maicon Sbardella, Bernardo Berenchtein, Carla De Andrade, Danilo Do Prado Perina, V.v. Almeida, Valdomiro Shigueru MiyadaAbstract:Abstract The motivation for including oils in the diets of weanling pigs is to increase dietary energy density to meet the pigs' energy requirements. The purpose of this study was to determine the digestible and metabolizable energy values of semi-refined rice oil (RO) and refined soybean oil (SO) for weanling pigs (Experiment 1), as well as to evaluate how replacing SO with RO in weanling pig diets affects performance, intestinal histology, organ morphometry and the occurrence of diarrhea (Experiment 2). In Experiment 1, 21 barrows, averaging 19.63 ± 0.37 kg body weight (BW), were used in a randomized complete block design experiment, with seven replications per treatment and one pig per experimental unit (metabolism cage). The treatments consisted of a reference diet and two test diets. The test diets were obtained by using 90% of the reference diet and 10% of RO or SO. The experimental period consisted of a 7 days adaptation period, followed by a 5 days collection period of feces and urine. The values of the apparent digestible energy, apparent metabolizable energy and N-corrected apparent metabolizable energy of the oils were, respectively, 26.24, 25.78 and 26.01 MJ kg − 1 for RO and 31.74, 31.35 and 31.51 MJ kg − 1 for SO. In Experiment 2, 120 weaned pigs, castrated males and females, averaging 6.74 ± 0.42 kg BW, were used in a randomized complete block design experiment, with eight replications per treatment and three pigs per experimental unit (pen) to evaluate the effects of five replacement levels of SO with RO in isonutritive weanling pig diets. The treatments were as follows: 4:0—basal diet with 4% of SO; 3:1—basal diet with 3% of SO and 1% of RO; 2:2—basal diet with 2% of SO and 2% of RO; 1:3—basal diet with 1% of SO and 3% of RO; and 0:4—basal diet with 4% of RO. No effects of the replacement levels were observed in the weanling pigs' performance, organ morphometry or in their occurrence of diarrhea. However, a quadratic effect on the villus width and a cubic effect on the villus height:crypt depth ratio were observed in the duodenum. Therefore, if the determined values of energy are used in the feed formulation, refined soybean oil can be replaced with semi-refined rice oil in weanling pig diets without affecting their growth performance.
William Owens - One of the best experts on this subject based on the ideXlab platform.
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testosterone stimulated Weanlings as an alternative to castrated male rats in the hershberger anti androgen assay
Regulatory Toxicology and Pharmacology, 2004Co-Authors: John Ashby, P A Lefevre, H Tinwell, J Odum, William OwensAbstract:We showed previously that stimulation of weanling male rats with the synthetic androgen 17-methyltestosterone (17MT) caused premature growth of the sex accessory tissues such that the activity of the two anti-androgens flutamide and DDE could be demonstrated (Regul. Toxicol. Pharmacol. 35 (2002) 280). We suggested that that protocol should be evaluated as an alternative to the castrated male rat Hershberger assay. In the present paper we justify changing the assay protocol to use testosterone propionate (TP), in place of 17MT, as the stimulating androgen. This change enables biochemical formation of dihydrotestosterone from testosterone, a conversion not possible when using 17MT. This change in the protocol enables detection of the testosterone-5-reductase inhibitor finasteride. The modified TP-stimulated weanling male rat assay is shown to have similar sensitivity to that of the castrated male rat Hershberger assay in detection of the anti-androgens flutamide, procymidone, vinclozolin, and DDE, and of the biochemical inhibitor finasteride. The anti-androgen linuron and the anabolic steroid trenbolone were also detected as positive by the TP-stimulated weanling male assay. It is suggested that this modified assay for anti-androgens should be validated as an alternative to the Hershberger assay, thereby reducing animal stress by obviating the need for surgical castration.
Charlotte R. Hansen - One of the best experts on this subject based on the ideXlab platform.
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Determinants of Weanling Thoroughbred Auction Prices
Journal of Agricultural and Applied Economics, 2018Co-Authors: Charlotte R. Hansen, C. Jill StoweAbstract:Determinants of prices of 1,302 weanling Thoroughbreds sold at the 2010 November Breeding Stock Sale at the Keeneland Association, Inc. are investigated. Weanlings, who are less than one-year-old, are of unknown breeding and racing quality; still, prices at auctions display high variability. A hedonic price analysis is utilized to identify the determinants of weanling sales prices, and the corresponding marginal values of those determinants are estimated. Prices were highly responsive to variables related to pedigree quality, including the sire’s stud fee, whether the sire was relatively new in his breeding career or not, and whether the dam or the dam’s progeny had earned black type. In addition, prices were influenced by individual characteristics such as gender, age, state of birth. The weanling’s placement in the sale and pinhooked Weanlings also influenced price. Results can be used as a decision tool by both buyers and sellers.
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Determinants of Weanling Thoroughbred Auction Prices
2016Co-Authors: Charlotte R. Hansen, C. Jill StoweAbstract:Determinants of the prices of weanling Thoroughbreds sold at the 2010 November Breeding Stock Sale at the Keeneland Association, Inc. are investigated. A cross-sectional dataset of 1,343 Weanlings are used who were for sale at this auction. Weanlings, whose quality and racing potential is unknown, often have hammer prices at auctions that range from low to high prices, but this can also be reflected by the market at a given time. Even Weanlings whose reserve price is not met at an auction, the highest bidding price reveals something about the market and the quality of that weanling based on certain determinants. But what determinants drive weanling prices in which they have yet to prove themselves in any way, but buyers are willing to buy at a low or a high price. By using hedonic price analysis, the determinants of weanling sales prices can be identified and the corresponding marginal values of those determinates estimated. Weanlings who have a sire that is successful in the breeding shed, and a dam that won graded races, as well as her progeny that won graded races, influence the price of a weanling positively. Results of this study aids sellers in the decision-making process of valuing their Weanlings and, perhaps, deciding whether to enter them in the sale. Additionally, this information can be used to inform buyers in their ability to fairly value their purchase of a weanling.
Maicon Sbardella - One of the best experts on this subject based on the ideXlab platform.
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Rice oil as a soybean oil replacement in weanling pig diets
Livestock Science, 2020Co-Authors: Maicon Sbardella, Bernardo Berenchtein, Carla De Andrade, Danilo Do Prado Perina, V.v. Almeida, Valdomiro Shigueru MiyadaAbstract:The motivation for including oils in the diets of weanling pigs is to increase dietary energy density to meet the pigs' energy requirements. The purpose of this study was to determine the digestible and metabolizable energy values of semi-refined rice oil (RO) and refined soybean oil (SO) for weanling pigs (Experiment 1), as well as to evaluate how replacing SO with RO in weanling pig diets affects performance, intestinal histology, organ morphometry and the occurrence of diarrhea (Experiment 2). In Experiment 1,21 barrows, averaging 19.63 +/- 0.37 kg body weight (BW), were used in a randomized complete block design experiment, with seven replications per treatment and one pig per experimental unit (metabolism cage). The treatments consisted of a reference diet and two test diets. The test diets were obtained by using 90% of the reference diet and 10% of RO or SO. The experimental period consisted of a 7 days adaptation period, followed by a 5 days collection period of feces and urine. The values of the apparent digestible energy, apparent metabolizable energy and N-corrected apparent metabolizable energy of the oils were, respectively, 26.24, 25.78 and 26.01 MJ kg(-1) for RO and 31.74, 31.35 and 31.51 MJ kg(-1) for SO. In Experiment 2, 120 weaned pigs, castrated males and females, averaging 6.74 +/- 0.42 kg BW, were used in a randomized complete block design experiment, with eight replications per treatment and three pigs per experimental unit (pen) to evaluate the effects of five replacement levels of SO with RO in isonutritive weanling pig diets. The treatments were as follows: 4:0 basal diet with 4% of SO; 3:1 basal diet with 3% of SO and 1% of RO; 2:2 basal diet with 2% of SO and 2% of RO; 1:3 basal diet with 1% of SO and 3% of RO; and 0:4 basal diet with 4% of RO. No effects of the replacement levels were observed in the weanling pigs' performance, organ morphometry or in their occurrence of diarrhea. However, a quadratic effect on the villus width and a cubic effect on the villus height:crypt depth ratio were observed in the duodenum. Therefore, if the determined values of energy are used in the feed formulation, refined soybean oil can be replaced with semi-refined rice oil in weanling pig diets without affecting their growth performance. (C) 2011 Elsevier B.V. All rights reserved.Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP
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Rice oil as a soybean oil replacement in weanling pig diets
Livestock Science, 2012Co-Authors: Maicon Sbardella, Bernardo Berenchtein, Carla De Andrade, Danilo Do Prado Perina, V.v. Almeida, Valdomiro Shigueru MiyadaAbstract:Abstract The motivation for including oils in the diets of weanling pigs is to increase dietary energy density to meet the pigs' energy requirements. The purpose of this study was to determine the digestible and metabolizable energy values of semi-refined rice oil (RO) and refined soybean oil (SO) for weanling pigs (Experiment 1), as well as to evaluate how replacing SO with RO in weanling pig diets affects performance, intestinal histology, organ morphometry and the occurrence of diarrhea (Experiment 2). In Experiment 1, 21 barrows, averaging 19.63 ± 0.37 kg body weight (BW), were used in a randomized complete block design experiment, with seven replications per treatment and one pig per experimental unit (metabolism cage). The treatments consisted of a reference diet and two test diets. The test diets were obtained by using 90% of the reference diet and 10% of RO or SO. The experimental period consisted of a 7 days adaptation period, followed by a 5 days collection period of feces and urine. The values of the apparent digestible energy, apparent metabolizable energy and N-corrected apparent metabolizable energy of the oils were, respectively, 26.24, 25.78 and 26.01 MJ kg − 1 for RO and 31.74, 31.35 and 31.51 MJ kg − 1 for SO. In Experiment 2, 120 weaned pigs, castrated males and females, averaging 6.74 ± 0.42 kg BW, were used in a randomized complete block design experiment, with eight replications per treatment and three pigs per experimental unit (pen) to evaluate the effects of five replacement levels of SO with RO in isonutritive weanling pig diets. The treatments were as follows: 4:0—basal diet with 4% of SO; 3:1—basal diet with 3% of SO and 1% of RO; 2:2—basal diet with 2% of SO and 2% of RO; 1:3—basal diet with 1% of SO and 3% of RO; and 0:4—basal diet with 4% of RO. No effects of the replacement levels were observed in the weanling pigs' performance, organ morphometry or in their occurrence of diarrhea. However, a quadratic effect on the villus width and a cubic effect on the villus height:crypt depth ratio were observed in the duodenum. Therefore, if the determined values of energy are used in the feed formulation, refined soybean oil can be replaced with semi-refined rice oil in weanling pig diets without affecting their growth performance.
