Browsing by Autor "Daniel Antonio Perdomo"

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    Comparación morfométrica y de los rendimientos cárnicos de dos especies piscícolas continentales criadas en el estado Trujillo, Venezuela
    (2017) Daniel Antonio Perdomo; Katiuska Castellanos; Miguel A. Maffei Valero; José David Gechele; Zenaida Corredor; José Arnoldo Piña; Moises David Martínez; Anthony José Naranjo
    A comparative study of morphometric and meat yields two freshwater fish, cachama (Colossoma macropomum) and Nile tilapia (Oreochromis niloticus, Chitralada strain), farmed under intensive conditions in Trujillo state, Venezuela; using a completely randomized design was conducted. The morphometric variables related to total length (LT), standard length (LS), head length (LC), head height (AC), body longitude (LTr), body thickness (ET) were determined. Morphometric relations measured were: head length/head height (LC/AC), head length/standard length (LC/LS), head length/total length (LC/LT), body longitude/body thickness (LTR/ET), body longitude/standard length (LTr/LS), standard length/total length (LS/LT). The carcass yield (%RC), fillet yield (%RFi) and waste (%R) was determined as beefing variables. The morphometric parameters and weight variables showed significant differences in favor of C. macropomum (P 0,05) for fish species.
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    Tasa de fertilidad al primer servicio en vacas resultantes del cruce alterno entre Brahman Rojo y Holstein Rojo de acuerdo con el predominio racial, la generación (madres e hijas) y a la época de parto
    (Asociación Latinoamericana de Producción Animal, 2022) Fernando P. Perea; Eleazar Soto‐Belloso; Daniel Antonio Perdomo; Mariana S. Perea; Roberto A. Palomares; Juan Carlos Gutiérrez-Añez; Hugo Hernández–Fonseca
    The fertility rate at 1st service (FPS) is the percentage relationship between the cows that become pregnant at the 1st service and those that are served for the first time, and constitutes an important reproductive index that allows evaluating the reproductive efficiency of the herd (González-Stagnaro, 2001). The effect of racial predominance and season on FPS in tropical mestizo cows was previously described (Perea et al., 2005; Perea and González-Stagnaro, 2005). In Bos indicus predominant cows, FPS is higher than in Bos taurus predominant cows (Perea et al., 2006). The dry season favors a higher FPS in both genetic groups (Perea et al., 2006). Considering a population of mestizo cows subject to alternate crossbreeding between the Red Holstein and Red Brahman breeds, the objective of this study was to evaluate the FPS in predominantly Brahman or Holstein mothers and daughters according to three calving seasons in the year.