Examinando por Autor "Feijoo Narvasta, Shefferson Gilbert Wilson"

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Caracterización del sistema productivo de fincas ganaderas de las provincias Tambopata y Tahuamanu, Madre de Dios, Perú
(Facultad de Ciencias Veterinarias de la Universidad del Zulia, 2022-12-29) Quispe Ccasa, Hurley Abel; Canto Saenz, Francys Mitchel; Ampuero Trigoso, Gustavo; Feijoo Narvasta, Shefferson Gilbert Wilson; Huaman Fuertes, Ethel
Las políticas agrarias para el mejoramiento de la productividad pecuaria requieren información para formular estrategias de intervención, de acuerdo a las características heterogéneas de los ganaderos y el manejo de sus fincas. El objetivo del estudio fue caracterizar el componente sociodemográfico de los ganaderos y las características del sistema productivo de fincas ganaderas de las provincias de Tambopata (distrito Laberinto, Las piedras y Tambopata) y Tahuamanu (distrito Iberia e Iñapari), departamento de Madre de Dios, Perú. Se aplicó una entrevista estructurada a 183 ganaderos en los cinco Distritos, considerando 33 indicadores. Los datos se analizaron con estadística descriptiva, tablas de contingencia, asociación, ANOVA y prueba de Kruskal-Wallis, y análisis de conglomerados. Se encontró asociación significativa entre distrito con género, ocupación secundaria y fuente de ingresos primaria. La provincia y distrito se asociaron a la fuente de ingreso primaria, tipo de mano de obra, preparación de terreno, pasto para pastoreo y raza bovina secundaria (P<0,05). Hubo diferencias entre años de residencia en el departamento de Madre de Dios y años de dedicación a la ganadería, según provincia, distrito, género y edad (P<0,01). Además, el número de hectáreas para pastoreo y número de cabezas de ganado variaron por provincia y distrito (P<0,01). Se caracterizaron tres grupos de ganaderos: tradicional-experimentado, menos experimentado y experimentado. Los años en la ganadería fueron 32,4 ± 9,5; 16,2 ± 7,7 y 28,0 ± 11,6 años y las unidades animal promedio fueron 69,9 ± 47,7; 40,3 ± 34,6 y 314,4 ± 106,5, respectivamente. En general, existe predominio del enfoque productivo a ganado de carne (85,5 %), uso de Brachiaria brizantha para pastoreo (69,4 %) y el ganado criollo como el más frecuente (68,8 %).
Seroprevalence of reproductive and infectious diseases in cattle: the case of Madre de Dios in the Peruvian southeastern tropics
(American Veterinary Medical Association, 2024-02-12) León Trinidad, Silvia Eliana; Barrantes Bravo, Christian; Feijoo Narvasta, Shefferson Gilbert Wilson; Huamán Fuertes, Ethel; Ampuero Trigoso, Gustavo; Canto Sáenz, Francys Mitchel; Quispe Ccasa, Hurley Abel
OBJECTIVE The objective of this study was to determine the seroprevalence of reproductive and infectious diseases in tropical cattle in the Tambopata and Tahuamanu Provinces in the department of Madre de Dios, Peru. SAMPLE 156 bovines from 7 cattle farms were sampled. These farms used exclusive grazing for food and natural mating for reproduction and did not have sanitary or vaccination programs. METHODS The serum of blood samples was subjected to ELISA with commercial kits for the detection of antibodies against Neospora caninum, Mycobacterium avium subsp paratuberculosis (MAP), Leptospira interrogans, pestivirus bovine viral diarrhea virus-1, retrovirus bovine leukemia virus (BLV), orbivirus bluetongue virus (BTV), and herpesvirus bovine herpes virus-1 (BHV). The data were analyzed by means of association tests with χ2 (P < .05) and Spearman rank correlation (P < .05) in the SPSS v.15.0 software (IBM Corp). RESULTS A low prevalence of antibodies to L interrogans, N caninum, M avium subsp paratuberculosis, bovine viral diarrhea virus-1 was found, but it was high to BTV, BLV, and BHV (100%, 53.85%, and 72.44%, respectively). The presence of BLV and BHV was higher in the Las Piedras District, bovines less than 5 years old, and cattle with breed characteristics of zebu and crossbred (P < .01). In addition, there was a significant correlation between both infections, showing 83.3% of BLV positivity that were also BHV positive (P < .01). CLINICAL RELEVANCE The high prevalence of antibodies to BTV, BHV, and BLV could be due to livestock management practices, direct con tact with infected animals, and variation of the presence of vectors and natural reservoirs in the context of climate change in the tropics.
Unlocking the complete chloroplast genome of a native tree species from the Amazon Basin, capirona (Calycophyllum spruceanum, Rubiaceae), and Its comparative analysis with other Ixoroideae species
(MDPI, 2022-01-07) Saldaña Serrano, Carla Lizet; Rodriguez Grados, Pedro Manuel; Chávez Galarza, Julio César; Feijoo Narvasta, Shefferson Gilbert Wilson; Guerrero Abad, Juan Carlos; Vásquez Pérez, Héctor Vladimir; Maicelo Quintana, Jorge Luis; Jhoncon, Jorge H.; Arbizu Berrocal, Carlos Irvin
Capirona (Calycophyllum spruceanum Benth.) belongs to subfamily Ixoroideae, one of the major lineages in the Rubiaceae family, and is an important timber tree. It originated in the Amazon Basin and has widespread distribution in Bolivia, Peru, Colombia, and Brazil. In this study, we obtained the first complete chloroplast (cp) genome of capirona from the department of Madre de Dios located in the Peruvian Amazon. High-quality genomic DNA was used to construct libraries. Pair-end clean reads were obtained by PE 150 library and the Illumina HiSeq 2500 platform. The complete cp genome of C. spruceanum has a 154,480 bp in length with typical quadripartite structure, containing a large single copy (LSC) region (84,813 bp) and a small single-copy (SSC) region (18,101 bp), separated by two inverted repeat (IR) regions (25,783 bp). The annotation of C. spruceanum cp genome predicted 87 protein-coding genes (CDS), 8 ribosomal RNA (rRNA) genes, 37 transfer RNA (tRNA) genes, and one pseudogene. A total of 41 simple sequence repeats (SSR) of this cp genome were divided into mononucleotides (29), dinucleotides (5), trinucleotides (3), and tetranucleotides (4). Most of these repeats were distributed in the noncoding regions. Whole chloroplast genome comparison with the other six Ixoroideae species revealed that the small single copy and large single copy regions showed more divergence than inverted regions. Finally, phylogenetic analyses resolved that C. spruceanum is a sister species to Emmenopterys henryi and confirms its position within the subfamily Ixoroideae. This study reports for the first time the genome organization, gene content, and structural features of the chloroplast genome of C. spruceanum, providing valuable information for genetic and evolutionary studies in the genus Calycophyllum and beyond.