Ciencias Agropecuarias

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    Evaluación del forraje verde hidropónico de cebada (Hordeum vulgare) y concentrado sobre los índices productivos en etapas de crecimiento y engorde en cuyes (Cavia porcellus)
    (2024-08) Villalba Chulco, Ambar Cristina; Núñez Torres, Oscar Patricio
    The study evaluated the effects of different proportions of hydroponic barley green fodder (FVHC) and feed concentrate in the feeding of guinea pigs in the growth and fattening stages. The treatments were distributed in five groups: 100% FVHC + 0% feed concentrate (T0), 75% FVHC + 25% feed concentrate (T1), 50% FVHC + 50% feed concentrate (T2), 25% FVHC + 75% feed concentrate (T3) and 0% FVHC + 100% feed concentrate (T4). The results showed that T2 (50% FVHC + 50% feed concentrate) was the most balanced and effective as it obtained significant weight gain and adequate feed conversion in the growth and fattening stage. On the contrary, T0 (100% FVHC + 0% feed concentrate) and T4 (0% FVHC + 100% feed concentrate) had limitations in which the former obtained higher feed intake and higher feed conversion, demonstrating that it was not sufficient to satisfy the guinea pig's nutritional requirements. On the other hand, T4 presented lower feed efficiency throughout the study because the insufficient amount of fiber negatively affected its performance. Finally, the study emphasizes the importance of a mixed diet to ensure optimal performance and welfare of the guinea pigs.
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    Prevalencia de ectoparásitos artrópodos de cuyes (Cavia porcellus) y su control con Beauveria bassiana en condiciones de laboratorio
    (2024-08) Altamirano Cevallos, Daniela Dessire; Vásquez Freytez, Carlos Luis
    Production of guinea pig (Cavia porcellus) can be affected by different factors, including skin problems, especially ectoparasites, which also predispose to secondary infections. Given the high incidence of ectoparasites, constant control measures are required, which are generally done through the use of chemical products. Therefore, in this research, the prevalence of ectoparasitic arthropods in guinea pigs in the Cevallos municipality and their control with Beauveria bassiana in laboratory conditions were evaluated. Firstly, samples were taken in the different localities in Cevallos (Vinces, Jesús del Gran Poder, Barrio La Amistad, Las Playas, Andignato, Tambo, San Pedro, Mirador, Santo Domingo, La Floresta, Belén, Santa Rosa and Agua Santa) to identify the ectoparasite species. The effect of different concentrations of a commercial product based on the entomopathogenic fungus (Beauvetic) was then evaluated: D1= 1x105 conidia (T1), D2= 1x106 conidia (T2), D3= 1 x107 conidia (T3) and a control treatment (D0) was used. Three species of ectoparasites associated with guinea pigs were identified in the different locations in the Cevallos canton, two species of mites of the genus Ornithonyssus (Ornithonyssus sp1 and Ornithonyssus sp2) and one species of chewing louse, Trimenopon hispidum, within the Trimenoponidae family. In general, mites showed a higher prevalence than lice in all the sampled areas. The effect of increasing the different concentrations of B. bassiana on the mortality of the two species of ectoparasitic mites was demonstrated, being greater when used at concentrations of 1x107 and 1x108 conidia/ml in both species of Ornithonyssus, which were significantly higher than in the rest of the treatments. Given the results obtained under in vitro conditions, it is suggested to evaluate its control effect with direct applications on guinea pigs in order to assess its safety for the animal.