Examinando por Autor "Ruiz Chamorro, Jose Antonio"

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Occurrence of endoparasites in creole goats under an extensive production system on the southern coast of Peru
(MDPI, 2025-04-30) Sessarego Davila, Emmanuel Alexander; Soca Jorge, Jhony; Terán Rojas, Jose Alfonso; Dávalos Almeyda, María Emilia; Valdivia Zevallos, Justo; Ruiz Chamorro, Jose Antonio; Cruz Luis, Juancarlos Alejandro; Cruz Flores, Danny Julio
Endoparasitosis is a critical health challenge in the management of Creole goats under extensive production systems due to its negative impact on animal health and productivity. This study determined the occurrence of endoparasites and identified associated risk factors in Creole goats from the southern coast of Peru. Fecal samples were collected from 129 goats in two localities of the Pisco province to detect the presence of oocysts from Eimeria spp. and eggs from trichostrongyles, Skrjabinema spp., Trichuris spp., and Fasciola hepatica. Data were analyzed using logistic regression models and adjusted through bootstrapping and stepwise selection methods, with locality, feeding type, age, and body condition as predictive variables. The results revealed a high occurrence of Eimeria spp. (86.0%) and trichostrongyles (65.1%), while Fasciola hepatica (14.0%) and Skrjabinemaspp. (7.0%) were exclusively identified in Independencia and San Clemente, respectively. Mixed infestations were predominant (65.9%), occurring more frequently in Independencia (75.9%) than in San Clemente (57.7%) (OR: 2.26, p < 0.05). The likelihood of infestation was significantly higher in Independencia for Eimeria spp. (OR: 5.72, p < 0.01) and Fasciola hepatica (OR: 61.4, p < 0.01). Moreover, goats fed exclusively on alfalfa were more likely to be infested with Fasciola hepatica compared to those fed a mixed diet of alfalfa and crop residues (OR: 0.06, p < 0.05). These findings underscore the necessity of implementing comprehensive health programs tailored to local management and feeding conditions.
Short Communication: Prediction of body weight using morphometric measurements in Creole goats from Peru
(Society for Indonesian Biodiversity, 2025-07-15) Paredes Chocce, Miguel Enrique; Sessarego Davila, Emmanuel Alexander; Tafur Gutierrez, Lucinda; Temoche Socola, Victor Alexander; Salinas Marco, Jorge; Acosta Granados, Irene Carol; Ruiz Chamorro, Jose Antonio; Cruz Luis, Juancarlos Alejandro; Trillo Zarate, Fritz Carlos
Goats are an important component of smallholder family farms along the coast and highlands of Peru. The weight of an animal is an important indicator of the production and economy of farmers in rural areas. Therefore, this study aimed to develop predictive models for Body Weight (BW) using Morphometric Measurements (MM) of Creole goats (Capra hircus) in Perú. BW and five MM were collected from 356 goats from the coast and highlands of Peru. Variables were analyzed using correlation and stepwise regression analysis to select the best model based on the coefficient of determination (r²), adjusted r², Residual Standard Error (RSE), and Akaike Information Criterion (AIC) using the RStudio statistical software. The highest correlation was found between BW and TG (0.76), followed by RW (0.67), and RH (0.65). The combinations of MM selected as predictors of BW by stepwise regression were TG, RH, and RW, with r² 0.640. The selected candidate model met all established tests and, upon validation, reached an r² of 0.66 (p<0.001), indicating that the model can adequately predict the BW of Peruvian Creole goats and serve as a practical tool to support selection programs, feeding strategies, and market decision-making in smallholder systems.