The breeding of creole cattle from the southern region of Ecuador, also known as Criollo Lojano, is a source of economic support and work for the communities located in the remote areas of the Andes mountains in this region. These cattle are grouped into four biotypes based on their phenotypic characteristics: Negro Lojano, Encerado, Colorado, and Cajamarca or Pintado. This study analyzes the morphometric variability of these creole cattle using least squares means (LSM) and restricted maximum likelihood Restricted Maximum Likelihood (REML) variance components. The evaluation parameters used to characterize these cattle were live weight plus 15 morphometric characteristics and nine morphometric indexes. The measurements came from 151 adult animals (28 male and 123 females). With the exception of Height at Withers (P = 0.06), the other morphometric characteristics do not show significant difference among these creole biotypes. Sexual dimorphism was found in live weight, thoracic circumference, height at withers, chest width, length of thorax, length of body, depth of thorax, depth of abdomen, length of head, and length of horns (P < 0.05). The adult Creole Lojano has an average live weight of 288 ± 12.9 kg (mean ± standard error), The Cephalic index is 45.6, the Corporal index is 115.9, the Pelvic index is 90.5, the Thoracic index is 58.3, the Proportionality index is 62.6, the Thoracic Capacity index is 2.1, the Lower Leg–Thoracic index is 9.9, the Transverse Pelvic index is 34.7, and the Pelvic Length index is 38.4. This creole bovine breed presents 4 biotypes that are similar; there are differences in the analysis with respect to sex (males are higher in 10 of the 16 characteristics analyzed); and on the basis of the indexes, this animal is small, has a triangular head, is longilinear with a long and narrow hip. It is a dual-purpose milk type with the exception of the Colorado biotype which is a dual purpose meat type.
Existe una comprobada influencia de la luna sobre las labores culturales en las plantas, pero, a nivel de los animales tal acción ha sido muy poco analizada. El objetivo de la presente investigación fue analizar la influencia de las fases lunares sobre algunos procesos reproductivos en bovinos. Los resultados se obtuvieron del análisis estadístico por X 2 de una base de datos de 830 celos naturales y 305 nacimientos, en bovinos de diferentes hatos ganaderos asentados en el Sur del Ecuador, determinándose que los celos naturales y nacimientos siguen un proceso cíclico de presentación, siendo más frecuentes en las fases de Cuarto creciente y Luna llena, sin embargo la incidencia fue baja en la fase de Cuarto menguante. Las hembras que fueron cubiertas en cualquiera fase lunar tienden a parir en las dos fases siguientes y la probabilidad de parición en la misma fase en que fue cubierta es baja. En cuanto a la reproducción programada, los mejores resultados en la preñez al primer servicio se obtuvieron cuando las hembras fueron sincronizadas en las fases de Luna nueva y Cuarto creciente. En conclusión hay influencia de las fases lunares en los procesos reproductivos analizados, siendo importante su consideración para obtener mejores resultados.
The largest population of goats (62%) in Ecuador is in the dry forest region in the south of the country. A Creole goat, named “Chusca Lojana”, has adapted to the dry forest region where environmental conditions are warm-dry, with sparse vegetation. Knowledge of the genetic information of the Creole goat is important to determine intra-racial diversity, the degree of genetic distance among other breeds of goats, and the possible substructure of the population, which is valuable for the conservation of such a species’ genetic resources. A total of 145 samples of the Creole goat was taken from the four biotypes previously identified. Genetic analyses were performed using 38 microsatellites recommended for studies of goat genetic diversity (FAO-ISAG). The results of within-breed genetic diversity showed a mean number of alleles per locus (MNA) of 8, an effective number of alleles (Ae) of 4.3, an expected heterozygosity (He) of 0.71, an observed heterozygosity (Ho) of 0.63, polymorphic information content (PIC) of 0.67, and an FIS value of 0.11. Between-breed genetic diversity among 43 goat populations (native of Spain, American Creole, Europeans, and Africans) showed the following values: FIS = 0.087, FIT = 0.176, and FST = 0.098. Regarding the analysis of the population structure, the results showed that the Creole Chusca Lojana goat population is homogeneous and no genetic separation was observed between the different biotypes (FST = 0.0073). In conclusion, the Chusca Lojana goat has a high genetic diversity, without exhibiting a genetic substructure. Therefore, it should be considered as a distinct population because crossbreeding with other breeds was not detected.
La Brucelosis es una enfermedad infecciosa producida por Brucella mellitensis, siendo la causa más importante de aborto en cabras. En la provincia de Loja, al sur del Ecuador, se encuentra la mayor población de caprinos del país, que también reporta la presencia de abortos; en razas de tipo especializado se han realizado trabajos aislados para determinar la presencia de esta bacteria, sin embargo, del nicho de animales criollos no se dispone de información sanitaria realizada, el presente estudio se realizó con el objetivo de monitorear si una de las causas de los abortos en la cabra chusca criolla es la B. mellitensis, se levantó información epidemiológica por tres meses registrándose el 66.5% de abortos en los animales muestreados, se realizó el diagnóstico de B. mellitensis por medio de técnica de reacción en cadena de la polimerasa PCR, amplificando un fragmento de 731 pb sin registrarse amplificación del fragmento de Brucella investigado.
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 © 2025 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.