Ciencia Animal Brasileira最新文献_第2页

Spectrophotometric method for determination of Colossoma macropomum (tambaqui) sperm concentration 分光光度法测定大巨像(tambaqui)精子浓度

Ciencia Animal Brasileira Pub Date : 2023-06-26 DOI: 10.1590/1809-6891v24e-74695e

C. S. S. Vanderley, Marcelo José da Ascensão Feitosa Vieira, T. M. Torres, Marcos Luiz da Silva Apoliano, Carlos Henrique Sousa de Melo, C. Salgueiro, J. Nunes

{"title":"Spectrophotometric method for determination of Colossoma macropomum (tambaqui) sperm concentration","authors":"C. S. S. Vanderley, Marcelo José da Ascensão Feitosa Vieira, T. M. Torres, Marcos Luiz da Silva Apoliano, Carlos Henrique Sousa de Melo, C. Salgueiro, J. Nunes","doi":"10.1590/1809-6891v24e-74695e","DOIUrl":"https://doi.org/10.1590/1809-6891v24e-74695e","url":null,"abstract":"Abstract To assist the reproductive management of tambaqui (Colossoma macropomum) males in laboratory and commercial fish farming, a linear regression model was obtained from concentration curves using the spectrophotometric method. Twenty-two tambaqui males with an average age of three years old were selected and divided into two groups containing 11 animals each. Both groups alternately received a single dose of carp pituitary extract (CPE; 2.0 mg/kg body weight, intracoelomic). Sperm was collected 14 h after hormonal treatment and diluted (1:4000; sperm:formaldehyde saline). The concentration was estimated by counting spermatozoa in a Neubauer chamber and by using a spectrophotometer (λ=540 nm). Individual sperm concentration ranged from 11.40 to 71.13 × 109 sperm/mL. The degree of transmittance ranged from 62.1% to 95.0%. There was a significant correlation (r2 = 0.966; p < 0.0001) between sperm concentration analyzed in a Neubauer chamber and transmittance at 540 nm. Analysis by spectrophotometry and the prediction provided by the equation Y=100.293 - 0.509X proved to be an efficient and fast method for estimating sperm concentration in tambaqui and can be used in routine procedures in artificial fish reproduction laboratories.","PeriodicalId":38520,"journal":{"name":"Ciencia Animal Brasileira","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67271243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Surgical Correction of Metatarsal Angular Deviation in a Thoroughbred Filly Using Wedge Metatarsal Ostectomy: a case report 楔形跖骨切除术矫正纯种母马跖骨角度偏差1例

Ciencia Animal Brasileira Pub Date : 2023-06-26 DOI: 10.1590/1809-6891v24e-75114e

J. A. Villanova Junior, Mônica Maciel, Pedro Augusto Lara, Luane Camargo Zeni, Carlos Eduardo Camargo, L. Capriglione, P. Michelotto Júnior

{"title":"Surgical Correction of Metatarsal Angular Deviation in a Thoroughbred Filly Using Wedge Metatarsal Ostectomy: a case report","authors":"J. A. Villanova Junior, Mônica Maciel, Pedro Augusto Lara, Luane Camargo Zeni, Carlos Eduardo Camargo, L. Capriglione, P. Michelotto Júnior","doi":"10.1590/1809-6891v24e-75114e","DOIUrl":"https://doi.org/10.1590/1809-6891v24e-75114e","url":null,"abstract":"Abstract This study describes a corrective procedure for a metatarsal angular malformation using wedge ostectomy in a 41-day-old Thoroughbred filly. A 41.6 °angular malformation of the metatarsus was corrected with wedge ostectomy of the left hindlimb in association with a type II external fixator and methyl methacrylate resin. The animal was subjected to the surgical procedure under general anesthesia. The filly was placed in dorsal recumbency with the left hind limb free for manipulation. A bone saw was used for the wedge ostectomy, while the bars for external fixation were placed using a drill. A Kirschner pin and acrylic resin were then applied. Radiographic images obtained immediately after surgery confirmed a total malformation reduction of 32.6 (from 41.6° to 9°). With medication and a Robert Jones bandage, intensive postoperative care was instituted to ensure that the animal adapted properly to the linear external fixator without overloading the pins and connection bars. No postoperative complications were observed. On the day after surgery, the filly was standing and walking with no signs of pain. After 180 days, total osseous calcification was achieved, and the implants were removed during the second surgery. The filly demonstrated adequate locomotion, performed all the movements, and ran without any difficulty in the paddock. The remaining discrete angular deviations were partially corrected using hoof trimming.","PeriodicalId":38520,"journal":{"name":"Ciencia Animal Brasileira","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67270896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of dog tooth enamel by scanning electron microscopy after different types of polishing 不同抛光方式对犬牙釉质的扫描电镜评价

Ciencia Animal Brasileira Pub Date : 2023-06-26 DOI: 10.1590/1809-6891v24e-74619e

Nelcimara Mirley de Souza Correia, Vitor Eduardo Arantes de Barros, Emmanuel Arnhold, M. Fioravanti, Raquel Cunha Carneiro, Patricia Lorena da Silva Neves Guimarães

{"title":"Evaluation of dog tooth enamel by scanning electron microscopy after different types of polishing","authors":"Nelcimara Mirley de Souza Correia, Vitor Eduardo Arantes de Barros, Emmanuel Arnhold, M. Fioravanti, Raquel Cunha Carneiro, Patricia Lorena da Silva Neves Guimarães","doi":"10.1590/1809-6891v24e-74619e","DOIUrl":"https://doi.org/10.1590/1809-6891v24e-74619e","url":null,"abstract":"Abstract Polishing is an important procedure which takes part in the periodontal disease treatment, being commonly performed with the help of prophylactic paste and provides smoothing of the tooth surface, hindering the adhesion of new plaque. With this study we aimed to evaluate by means of scanning electron microscopy (SEM), the effects of dental polishing observing, qualitatively, the effectiveness and the damage, in three distinct treatments after calculus removal. Twenty (20) teeth were used (four of each dog), from which were obtained three samples each. The sixty samples were distributed into three groups (G0= tooth segmentation submitted to prophylaxis without polishing; G1= vestibular surface prophylaxis followed by polishing with the use of Defengy OC® and G2= vestibular surface prophylaxis followed by polishing with the use of pumice and fluorine gel). The samples were prepared and sent to images execution via SEM. These images, with enlargement of 100x and 500x, were evaluated and the classification averages were obtained. The statistical analysis of these averages was made through the Friedman nonparametric test using the software R. Statistical differences were observed (P<0,05) between groups 0 and 1 in the 100x magnification, whereas in the 500x magnification there was no difference (P>0,05) between the groups. The evaluation based on SEM images at two magnifications was essential, as it allowed the visualization of grooves and remaining calculi in a comprehensive way at 100x magnification and in more detail at 500x.","PeriodicalId":38520,"journal":{"name":"Ciencia Animal Brasileira","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67271115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ammonium dipropionate in the total mixed ration does not change the ingestive behavior but improves the productive performance of feedlot bulls 总混合日粮中添加二丙酸铵不会改变饲粮公牛的摄食行为，但能提高其生产性能

Ciencia Animal Brasileira Pub Date : 2023-05-29 DOI: 10.1590/1809-6891v24e-74652e

Eduardo Rodrigues de Almeida, M. Neumann, Thomer Durman, A. M. Souza, F. Cristo, Ellen Baldissera, Elisa Emanuela Bremm

{"title":"Ammonium dipropionate in the total mixed ration does not change the ingestive behavior but improves the productive performance of feedlot bulls","authors":"Eduardo Rodrigues de Almeida, M. Neumann, Thomer Durman, A. M. Souza, F. Cristo, Ellen Baldissera, Elisa Emanuela Bremm","doi":"10.1590/1809-6891v24e-74652e","DOIUrl":"https://doi.org/10.1590/1809-6891v24e-74652e","url":null,"abstract":"Abstract The objective of the present study was to evaluate the productive performance, the ingestive behavior, the apparent digestibility of the diet, and the carcass characteristics of beef steers finished in confinement under the effect of ammonium dipropionate in the diet, and the fractionation or not in the supply of the diet. The experimental design was completely randomized, in a 2 x 2 factorial scheme, totaling four treatments, as follows: Diet without ammonium dipropionate provided twice a day; Diet without ammonium dipropionate given once daily; Diet with ammonium dipropionate provided twice daily; Ammonium dipropionate diet provided once daily. Thirty-two ½ Angus ½ Nellore bulls were used, with an average age of 11 months. The use of ammonium dipropionate in the overall average increased average daily gain, dry matter intake, and carcass gain. The diet provided twice a day provided, on average, greater weight gain, greater carcass gain, and better feed conversion. When evaluating the association between treatments, the use of dipropionate plus the diet supplied twice a day showed greater daily carcass gain during the experimental period and higher hot carcass weight (1.251 kg, 111.4 kg, and 308.6 kg respectively), as well as ensuring better apparent digestibility of dry matter (74.57%). With the data obtained in the present study, it is possible to state that it is advisable to use ammonium dipropionate while maintaining the fractionation of the diet for beef steers in the finishing phase.","PeriodicalId":38520,"journal":{"name":"Ciencia Animal Brasileira","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67271189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Testicular biometry and hierarchy of dominance of the white-lipped peccary (Mammalia, Tayassuidae) 白唇鲣鸟睾丸生物学特征及优势等级(哺乳纲，鲣鸟科)

Ciencia Animal Brasileira Pub Date : 2023-05-29 DOI: 10.1590/1809-6891v24e-75078e

Renan Luiz Albuquerque Vieira, M. C. Santos, Danilo Evaristo Leonardo, C. Barros, P. Pedroso, M. Feliciano, Ana K.S. Cavalcante

{"title":"Testicular biometry and hierarchy of dominance of the white-lipped peccary (Mammalia, Tayassuidae)","authors":"Renan Luiz Albuquerque Vieira, M. C. Santos, Danilo Evaristo Leonardo, C. Barros, P. Pedroso, M. Feliciano, Ana K.S. Cavalcante","doi":"10.1590/1809-6891v24e-75078e","DOIUrl":"https://doi.org/10.1590/1809-6891v24e-75078e","url":null,"abstract":"Abstract The objective of this study was to obtain data on the testicular biometry of the white-lipped peccary (Tayassu pecari) and to verify if there is a correlation between the individual’s biometric data with their dominance rank. Data were collected from 16 adult males, aged between two and seven years, who made up the same group. By the agonistic interactions analyses we calculated the linearity indexes (h') of the dominance hierarchy and dominance rank. At the end of the behavioral observations, males were captured to collect biometric data from the testis. White-lipped peccaries showed testicles located in a perineal position, inclined cranio-ventrally with oval shape, flattened laterally and with tenso-elastic consistency (2.54±0.07). There was variance in the means (± standard deviation) of testis length (5.88±1.05cm), width (4.24 ± 0.98cm), height (4.44±0.86cm), and total scrotal width (8.78±17.05). The linear dominance hierarchy described the social structure of the males of this group (h'>0.9), with probability of linearity in the hierarchy greater than chance (P = 0.02). There was a correlation between dominance rank with the body mass, length and volume of the testicles. As in general the dimensions of the testicles are directly correlated with sperm production and also testosterone, this characteristic favors the reproductive performance of dominant white-lips males. Therefore, the characteristics of testicular biometry of white-lips should be considered for the selection of individuals more likely to reproduce in captivity favoring the conservation of this vulnerable species.","PeriodicalId":38520,"journal":{"name":"Ciencia Animal Brasileira","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67271266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Epidemiological and anatomopathological findings of type 1 and 2 abomasum ulcers in cattle with different comorbidities 具有不同合并症的牛1型和2型皱胃溃疡的流行病学和解剖病理学结果

Ciencia Animal Brasileira Pub Date : 2023-05-29 DOI: 10.1590/1809-6891v24e-74772e

A.Q. Andrade Neto, J. R. Silva, C. L. Mendonça, Rodolfo José Cavalcanti, J. F. P. Cajueiro, Maria Izabel de Souza, L. Sá, J. Afonso

{"title":"Epidemiological and anatomopathological findings of type 1 and 2 abomasum ulcers in cattle with different comorbidities","authors":"A.Q. Andrade Neto, J. R. Silva, C. L. Mendonça, Rodolfo José Cavalcanti, J. F. P. Cajueiro, Maria Izabel de Souza, L. Sá, J. Afonso","doi":"10.1590/1809-6891v24e-74772e","DOIUrl":"https://doi.org/10.1590/1809-6891v24e-74772e","url":null,"abstract":"Abstract This study aimed to investigate the epidemiological and pathological findings of type 1 and 2 abomasal ulcers in cattle with different primary comorbidities. A total of 201 animals; 40/201 (20%) were young cattle under the age of two years and 161/201 (80%) were adult cattle over the age of two years, which were hospitalized for clinical care 152/201 (75,62%), 19/201 (9,45%) obstetric care, 17/201 (8,46%) surgical care and 13/201 (6,47%) for anatomopathological diagnosis, being euthanized or had natural death. The diagnosis of ulcers was based on the result of the post-mortem examination (macroscopic and histopathological analysis). Histopathological examination was performed on 201 fragments of ulcers and classified as type 1 or type 2. Of these, 193/201 (96.01%) corresponded to type 1 ulcers, of which 12/193 (5.97%) corresponded to subtype 1a lesions, 101/193 (50.25%) to subtype 1b, 77/ 193 (38.31%) to subtype 1c, 03/193 (1.49%) to subtype 1d, while 08/201 (3.98%) were type 2 ulcers. The ulcers were characterized by a focal, focally extensive, multifocal or diffuse inflammatory process, mainly by mononuclear cells. Abomasitis associated with ulcerated mucosa was found in 160/201 (79.60%). In 26/201 (12.93%) the abomasitis had diffuse foci of multifocal lymphocytic proliferation by atypical lymphocytes. Digestive and reproductive comorbidities were seen more frequently in cattle with type 1 or type 2 ulcers. The Subtype 1b focal ulcers and subtype 1a and 1b multifocal ulcers were more prevalent. In addition to the presence of comorbidities, most cases occur in the dry period, associated with feeding with higher amounts of concentrates and silages.","PeriodicalId":38520,"journal":{"name":"Ciencia Animal Brasileira","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67271319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Supplementation of yeast culture combined with an enzyme complex in the diet for confined steers 限制性阉牛日粮中添加酵母培养物与酶复合物的研究

Ciencia Animal Brasileira Pub Date : 2023-05-29 DOI: 10.1590/1809-6891v24e-74470e

L. Melo, P. Oliveira, D. C. Plodoviski, L. Costa, Caroline Bordignon da Rosa, Everton Luiz Carneiro Pereira, A. M. Souza, M. Neumann

{"title":"Supplementation of yeast culture combined with an enzyme complex in the diet for confined steers","authors":"L. Melo, P. Oliveira, D. C. Plodoviski, L. Costa, Caroline Bordignon da Rosa, Everton Luiz Carneiro Pereira, A. M. Souza, M. Neumann","doi":"10.1590/1809-6891v24e-74470e","DOIUrl":"https://doi.org/10.1590/1809-6891v24e-74470e","url":null,"abstract":"Abstract The objective was to evaluate the productive performance, apparent digestibility of the diet and ingestive behavior of beef cattle finished in feedlot under the effect of the inclusion of yeast culture or enzyme complex. The treatments were: diet without additives (control); diet with enzyme complex (7 g animal day-1); diet with yeast culture (7g animal day-1) and diet with the association of enzymatic complex (7 g animal day-1) and yeast culture (7g animal day-1). The experimental design was completely randomized, with five replications. Forty ½ Angus ½ Nellore steers, with an average initial body weight of 362 kg ± 6 kg, were used. Regardless of the evaluation period, non-supplementation caused the animals to gain less weight (0 to 21 days: 1.267 kg day-1; 0 to 42 days: 1.377 kg day-1; 0 to 63 days: 1.368 kg day-1) compared to supplemented animals, feed conversion for non-supplemented animals was also worse. Starch apparent digestibility showed higher averages when steers were supplemented with yeast culture alone and yeast culture combined with enzyme complex (97.30% and 97.07%, respectively). Supplementation using a combination of yeast culture with enzyme complex did not cause additional effects on weight gain, but resulted in the lowest averages for feed conversion.","PeriodicalId":38520,"journal":{"name":"Ciencia Animal Brasileira","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67270443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of variables inherent to the dynamics of the practice of vaquejada to determine its influence on the result obtained in the competition 分析vaquejada练习中固有的动态变量，以确定其对比赛结果的影响

Ciencia Animal Brasileira Pub Date : 2023-05-29 DOI: 10.1590/1809-6891v24e-74483e

T. Mariz, Paulo Otavio Silva Cavalcante, Heloiza Maria Pires Santos, P. B. Escodro, H. Parente, A. Perazzo, Taíne Cris Soares da Silva

{"title":"Analysis of variables inherent to the dynamics of the practice of vaquejada to determine its influence on the result obtained in the competition","authors":"T. Mariz, Paulo Otavio Silva Cavalcante, Heloiza Maria Pires Santos, P. B. Escodro, H. Parente, A. Perazzo, Taíne Cris Soares da Silva","doi":"10.1590/1809-6891v24e-74483e","DOIUrl":"https://doi.org/10.1590/1809-6891v24e-74483e","url":null,"abstract":"Abstract The objective of this work was to evaluate several attempts to knock down neats and to correlate the success obtained with actions performed by the horse/rider sets through an analysis of public domain videos of vaquejadas. Approximately 300 videos were considered, and the groups were evaluated according to the competition category, that is, amateur/aspirant and professional, and the animals used in the test, that is, pulling or tracking of the neat. It was found that for the pull set in the professional competition category, only the characteristics of directing the cow on the track, and the guiding behavior and positioning in the pull were significant (p<0.01), while for the amateur/aspirant category, the characteristics of remaining in the pull after falling of the cattle and of the behavior at the gate had an effect (p<0.01). The characteristic of remaining in the pull after the fall of the neats, in the category of professional pulling athletes, exists in greater prevalence during the competition with 85.3%, while the characteristic of directing the neat to the side of the track is performed by 87.6% of the competitors. For the set used to track the cattle, the values of the dimensions 1 and 2 were 96.56% and 3.43%, respectively, which is 99.9% of the total variance of the data based on those selected for the final result of “earn the ox”. The use of multiple diversity analysis in this study of variables associated with the vaquejada set proved to be quite advantageous, and there was not much variation in the elements obtained with a greater weight in the determination of the final result.","PeriodicalId":38520,"journal":{"name":"Ciencia Animal Brasileira","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67270564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Energy values and metabolizability coefficients of maize kernels with different specific gravities 不同比重玉米籽粒的能量值和代谢系数

Ciencia Animal Brasileira Pub Date : 2023-05-29 DOI: 10.1590/1809-6891v24e-74343e

Lucas Ferreira Batista, Eduardo de Faria Viana, E. Arnhold, M. Café, C. D. S. Leite, J. H. Stringhini

{"title":"Energy values and metabolizability coefficients of maize kernels with different specific gravities","authors":"Lucas Ferreira Batista, Eduardo de Faria Viana, E. Arnhold, M. Café, C. D. S. Leite, J. H. Stringhini","doi":"10.1590/1809-6891v24e-74343e","DOIUrl":"https://doi.org/10.1590/1809-6891v24e-74343e","url":null,"abstract":"Abstract The aim of this study was to examine the influence of the specific gravity of maize kernels on physicochemical traits, energy values, and metabolizability coefficients. Pearson’s correlations were evaluated between specific gravity (kg/m3) and crude protein (%); ether extract (%); crude fiber (%); gross energy (%); presence of fumonisins (ppb) and aflatoxins (ppb); and kernel quality (good, rotten, weevil-damaged, broken, and shriveled kernels, %). A metabolism trial was conducted with diets containing maize fractions of different specific gravities for male broilers from 14 to 21 days of age. Apparent metabolizable energy (AME), nitrogen-corrected AME (AMEn), and the metabolizability coefficients of dry matter (MCDM), crude protein (MCCP), ether extract (MCEE), calcium (MCCa), and phosphorus (MCP) were evaluated. The experiment consisted of five treatments (reference diet and diets with 40% replaced with maize at five specific gravities (740, 740, 760, or 800 kg/m3). Eight replications were used, totaling 400 broilers chickens. The Scott-Knott test was applied and regression equations were fitted to compare the treatments. Specific gravity had moderate correlations with good and broken kernels and low-magnitude correlations with chemical parameters. Increasing specific gravities caused AME and AMEn to increase linearly when analyzed on an as-is basis; and to respond quadratically when expressed on a dry-matter basis. The specific gravity of 780 kg/m3 provided the lowest MCDM, MCCP, MCCa, and MCP values, whereas the lowest MCEE, was found at the lowest density. It was not possible to determine the best nutritional composition or the best metabolizability coefficients.","PeriodicalId":38520,"journal":{"name":"Ciencia Animal Brasileira","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67270846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A proposed new frame score system for Nellore cattle 提出了一种新的内洛牛骨架评分系统

Ciencia Animal Brasileira Pub Date : 2023-05-08 DOI: 10.1590/1809-6891v24e-73754e

R. Sainz, N. Guimarães, A. Carmo, C. U. Magnabosco

{"title":"A proposed new frame score system for Nellore cattle","authors":"R. Sainz, N. Guimarães, A. Carmo, C. U. Magnabosco","doi":"10.1590/1809-6891v24e-73754e","DOIUrl":"https://doi.org/10.1590/1809-6891v24e-73754e","url":null,"abstract":"Abstract A new frame score system was developed for Nellore cattle, based upon ideal slaughter weights to achieve desired degrees of carcass fat cover. Data consisting of 688 complete records including sex, age, weight, hip height, and subcutaneous fat on growing Nellore cattle (190 males and 498 females) were obtained from the National Association of Breeders and Researchers (ANCP), Ribeirão Preto – SP, Brazil. Weight data were regressed on sex, age, hip height, and fat cover as covariates. Age was then fixed at 550 days and fat cover was set to 6 mm, and new equations for frame scores (1 to 11) in Nellore cattle were developed: FrameNellore (males) = -42.43 + 0.04919 × Age + 0.3368 × Height – 0.0003369 × Age × Height and FrameNellore (females) = -41.76 + 0.04919 × Age + 0.3368 × Height – 0.0003369 × Age × Height (Age and Height in days and cm, respectively). The Nellore equations resulted in average frame of 5.3, ranging from 2.3 to 7.7. Values were similar for males (5.4) and females (5.3). By contrast, previous equations gave higher values, that were very different between males and females. The new Nellore frame scores appear reasonable, particularly regarding body composition.","PeriodicalId":38520,"journal":{"name":"Ciencia Animal Brasileira","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67270175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0