Objective. The objective of the work was evaluate the damage genetic caused by the use of ivermectin (IVM) in cows zebu to concentrations of 1% and 3.15% through the test comet. Material and methods. 15 cows, were taken with age between 3 and 4 years old, average weight of 350 kg, body condition between 3 and 3.5. Three experimental groups with five animals per group, which were exposed to the concentration of IVM to 1% to 3.15% more group control (without application of IVM) were used. Animal blood sample was performed by venipuncture jugular or medial flow with vacutainer ® needle, extracting 8 ml of blood. The blood samples it was collected at 9, 18 and 27 days post-treatment. Results. The display of the comets is made by using fluorescence microscope, the cells were evaluated by means of visual log and the Comet image software. Evidenced the presence of nuclei with DNA migration in all analyzed plates. The values of classification of comets indicate cells with high levels of damage (grade 3: cells with high damage). The rate of DNA damage of the treatment to 1% to 3.15% was significant, to relate to the control group. Conclusions. The results obtained in this study demonstrate the likely genotoxic potential of the use of IVM in cattle.Keywords: Genetic damage, ADN, mammals, drug (Source: CAB). RESUMENObjetivo. El objetivo del trabajo fue evaluar el daño genético causado por el uso de Ivermectina (IVM) en vacas cebú (Bos taurus indicus). Materiales y Métodos. Se tomaron quince vacas, con edad entre tres y cuatro años, peso promedio de 350 kilogramos, condición corporal entre 3 y 3,5. Se utilizaron tres grupos experimentales con cinco animales por grupo, los cuales se expusieron a la concentración de IVM al 1% y 3,15% más un grupo control (sin aplicación de IVM). La muestra sanguínea por animal fue realizada mediante punción venosa yugular o caudal medial con aguja para vacutainer ®, extrayéndose 8 ml de sangre. Las muestras sanguíneas fueron recolectadas a los 9, 18 y 27 días postratamiento. Resultados. La visualización de los cometas se realizaron con microscopio de fluorescencia, las células fueron evaluadas por medio de registro visual y por el software Comet INTRODUCCIÓNEl uso de productos de origen químicos, para mantener el ganado vacuno sano y con altos rendimientos productivos, se basa en la necesidad de satisfacer la creciente demanda mundial de productos de origen animal. Los fármacos se aplican en forma habitual y con fines profilácticos a los animales de producción, para el tratamiento de enfermedades parasitarias. Se tiene poco conocimiento de estudios realizados sobre la genotoxicidad (definida como daño en el ADN) y/o citotoxicidad de la IVM en individuos (vectores, mamíferos y humanos), para los cuales el compuesto es disponibilizado para el control parasitario (1,2). Sin embargo, existe amplia literatura in vivo asociada a la evaluación de las formas de administración, dosis terapéuticas (3), sensibilidad de invertebrados a la droga (4) y resistencias (5,6).Para detectar el daño geno...
The sheep body measurements are useful indicators of type and function that allow improving the selection. Biometric studies have shown in sheep a relationship between these measures with some productive variables. The main purpose of this study was to evaluate the testicular development and their relationship with morphometric parameters on Colombian hairy sheep of Sampués, Sucre, Colombia. Weaned males (n=12) born between February and April of 2014 were used, and the following measures were taken every twenty-eight days: scrotal circumference (CS), body weight (PC), rump height (AG), withers height (AC), and right and left testicular length (LTD and LTL).The sheep were between three to twelve months old. A multiple regression analysis (RA) was done from PC; AG; AC; TL. To describe the variation of LT, the model included only the variables PC; AG; AC. The grade of association between the studied variables was performed by a Pearson correlation. Scrotal circumference showed a high correlation with the evaluated morphometric parameters. In the RA analysis, the PC influenced the variable CE (p<0.05), while other variables did not have a significant influence. According to the regression coefficient associated to the measurement, per each kg of PC that an animal gained in weight, there was a corresponding increase of 0,09 cm in the CS.
Objective: The objective of this study was to estimate the heritability ( h 2 ), repeatability ( r ), and correlations ( r ŷ i y i ) in some traits of zootechnical interest in a population of New Zealand white rabbits of a tropical dry forest area. Materials and Methods: Three mating groups were formed, each one of 1 male and 70 females. The traits evaluated were litter size at birth (LB), born alive (BA), born dead (BD), litter weight born alive (LW), litter weight at weaning (LWW), weaning weight (WW), slaughter weight (SW), and carcass weight (CW). Weaning took place at 42 days, and the fattening phase lasted 60 ± 3 days. A descriptive statistical study was carried out on the study variables. Paternal heritability was estimated ( ) and maternal ( ), repeatability, rabbit index IC, and Pearson’s correlations ( r ŷ i y i ) between traits. The descriptive statistics showed high variation for the BD traits. Results: The values of the productivity found were similar to those presented in studies around the world. h 2 presented magnitudes between low and medium. ranged between 0.09 and 0.42 and between 0.11 and 0.45 for . In general, the values of were higher than the values of . The r values for the traits LB, BA, LW, LWW, and SW presented low magnitude, while it was medium for WW and CW. From the values of r , IC was calculated for each of the rabbits, allowing their categorization, which will be used in future selection plans. r ŷ i y i among the variables ranged from −0.01 to 0.860. They were generally positive and mostly not significant ( p > 0.05); they took a magnitude from low to moderate, except for the correlation between LB and BA. Conclusion: The production of rabbits under tropical conditions is similar to other reports. The genetic parameters evaluated were medium-to-low, indicating a robust non-additive gene and/or environmental effect.
Objetivo. Realizar un análisis bibliométrico de la producción científica publicada en la Revista Colombiana de Ciencia Animal 2009-2018. Materiales y métodos. Se realizó un estudio bibliométrico descriptivo-retrospectivo incluyendo los artículos publicados en los últimos 10 años de la revista. Se seleccionaron indicadores bibliométricos como distribución cronológica, producción científica, índice de crecimiento, categorización temática, productividad de autores, coautoría y cooperación institucional. Se calcularon los indicadores cienciométricos mediante el software Harzing's Publish or Perish 6, tomando como base de datos el Google Académico. Resultados. Fueron evaluados 379 artículos científicos y se publicó un promedio de 16.48 artículos/volumen. La productividad ponderada fue de 0.39 artículos/autor; el H-index fue 13; el g-index fue de 18; el hi normalizado fue de 8 y el h1 anual fue de 0.89. Se evidenció un incremento en las contribuciones internacionales con predominio de los artículos originales. Conclusiones. Publicar un mayor número de artículos en inglés constituiría una oportunidad de mejorar la visibilidad de la revista. Se mostraron los indicadores específicos de la revista teniendo en cuenta su visibilidad y productividad ofrecidos por el programa Publish or Perish.
Palabras Clave:Correlación; búfalo; morfométría; reproducción. ResumenObjetivo: Caracterizar la circunferencia escrotal (CE) y su relación con otros parámetros morfometricos en machos bufalinos (Bubalus bubalis) de la raza Murrah en la Hacienda Mosquito, Municipio de San Marcos -Sucre -Colombia. Metodología: Se tomaron 14 machos a partir del destete hasta los 20 meses de edad, se les realizaron medidas testiculares (CE, longitud testicular), peso corporal y alzada al anca, cada 28 días. Para establecer la CE del grupo en estudio se utilizó estadística descriptiva, media y desviación estándar. Igualmente análisis de correlaciones simples entre CE con edad, peso, alzada al anca y longitud testicular (derecha e izquierda). Resultados: La CE aumentó durante el seguimiento experimental de 12,4 ± 1,0 cm a 20,2 ± 1,4 cm. El peso osciló de 162,1 ± 24,9 kg a 323,8 ± 39,8 kg. La LTD fluctúo de 4,0 ± 0,7 cm a 7,4 ± 0,7 cm. La LTI inició con 4,2 ± 0,5 cm y culminó con 6,9 ± 0,6 cm y la alzada al anca a los 10 meses fue de 104 ± 4,4 cm a 118 ± 3,4 cm a los 20 meses de edad de los animales estudiados. Las correlaciones entre CE con edad, peso, longitud testicular derecha e izquierda y alzada al anca fueron: r= 0,4, 0,90; 0,93; 0,91, y 0,71 respectivamente. Se concluye, que el crecimiento de la CE no fue uniforme, además se encontró una alta correlación entre la CE y los parámetros morfometricos estudiados. AbstractIn the present study the scrotal circumference of male buffaloes (Bubalus bubalis, Murrah race) was characterized and its relationship with other morphometric parameters was defined. The study was realized at "El Mosquito" farm, in San Marcos municipality in Sucre, Colombia. Fourteen (14) male buffaloes were taken from their weaning to twenty months old. These animals were subjected to testis measures (SC, testis longitude), body weight, and croup height, every twenty-eight days. To establish SC of the group under study, descriptive statistics was used, mean and standard deviation. In the same way, simple correlation analysis between SC with age, weight, croup height and testicular length (right and left). SC increased during experimental monitoring from 12, 4 ± 1, 0 cm to 20, 2 ± 1,4 cm. The weight ranged from 162, 1 ± 24, 9 kg to 323, 8 ± 39,8 kg. LTD fluctuated from 4,0 ± 0,7 cm to 7,4±0,7 cm. LTI began from 4,2 ± 0,5 cm and finished in 6,9 ± 0,6 cm and height rump at 10 months, was 104 ± 4,4 ± 3,4 cm to 118 cm at 20 months old male buffaloes studied. In conclusion, correlations between CE and age, weight, right and left testis length height and height haunch were: r = 0, 84; 0, 90; 0, 93; 0.91, and 0, 71 respectively. It´s concluded growth to SC was not uniform, also a high correlation was found between SC and morphometric parameters studied.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.