Agro Productividad https://revista-agroproductividad.org/index.php/agroproductividad <p><strong>Agro Productividad</strong> es una publicación mensual del Colegio de Postgraduados en Ciencias Agrícolas. Fue fundada en 2008 con el objetivo de difundir resultados en artículos científicos originales, así como notas científicas, revisiones temáticas, relacionados con la agricultura (cultivos, silvicultura, ganadería, pesca y acuicultura, y agroindustria) y la producción de agroalimentos.</p> <p>También aborda temáticas sobre procesos económicos, sociales y ambientales que impactan la productividad agrícola y el desarrollo rural.</p> <p>Todas las contribuciones recibidas son sometidas a un proceso de arbitraje doble ciego y edición final. La revista se publica en español y en inglés. Se encuentra indexada a diferentes indicadores nacionales e internacionales resaltando <a title="CONACYT (Competencia Internaciona)" href="http://www.revistascytconacyt.mx/index.php/revistas/resultado/461"><strong>CONACYT </strong>(Competencia Internacional)</a>,<a href="https://www.ebsco.com/"><em> EBSCO</em></a>, <a href="https://latam.cengage.com/">CENGAGE LEARNING</a>, INC., <a href="https://scholar.google.com/citations?hl=es&amp;user=BX46e5AAAAAJ">Google Académico</a> además de <a href="https://clarivate.libguides.com/webofscienceplatform/zr">Zoological Records</a> en <a href="https://mjl.clarivate.com/">Master Journal List</a> de <a href="https://clarivate.com/">Clarivate Analitycs</a> (antes ISI), <a href="http://periodica.unam.mx/F?func=find-b-0&amp;local_base=per01"><em>PERIODICA</em></a>-<a href="https://biblat.unam.mx/es/">Biblat</a>, <a href="https://www.cabdirect.org/">CABI</a> y <a href="http://revista-agroproductividad.org/index.php/agroproductividad/management/settings/cabdirect.org">CAB Abstracts</a>, <a href="https://www.latindex.org/latindex/Solar/Busqueda">Latindex (Directorio</a> y <a href="https://www.latindex.org/latindex/Solar/Busqueda">Catálogo</a>), <a href="https://www.redib.org/">REDIB</a>, <a href="http://sibdi.ucr.ac.cr/">SIBDI</a>, <a href="http://miar.ub.edu/">MIAR</a>, <a href="https://app.dimensions.ai/discover/publication?or_facet_source_title=jour.1389419&amp;and_facet_source_title=jour.1389419&amp;viz-st:aggr=mean">DIMENSIONS</a>, <a href="https://core.ac.uk/data-providers/14738">CORE</a>,<a href="https://www.scilit.net/journal/4149474"> Scilit</a>, <a href="https://ageconsearch.umn.edu/search?ln=en&amp;cc=2394">AgEconSEARCH , </a><a href="https://www.worldcat.org/title/agroproductividad-ap/oclc/1031278376&amp;referer=brief_results">WordCat </a>y recientemente <a href="https://www.base-search.net/Search/Results?q=dccoll:ftjrap&amp;refid=dctableen">BASE</a></p> es-ES agroproductividadeditor@gmail.com (Dr. Jorge Cadena Iñiguez) agroproductividadeditor@gmail.com (M.C. Valeria Abigail Martínez Sias) Thu, 08 Jul 2021 00:00:00 +0000 OJS 3.3.0.7 http://blogs.law.harvard.edu/tech/rss 60 REALIZED ECOLOGICAL NICHE OF THE MEXICAN SPOTTED OWL (Strix occidentalis lucida) IN MEXICO https://revista-agroproductividad.org/index.php/agroproductividad/article/view/2020 <p><strong>Objective:</strong> To characterize the realized niche of the Mexican spotted owl (Strix occidentalis lucida) and compare the environmental values it uses within the Mexican physiographic provinces.<br /><strong>Design/methodology/approach:</strong> The environmental temperature variables (n =7), precipitation (n = 7) and elevation (n = 1) were extracted from 79 unique occurrences sites of S. o. lucida. These values were grouped by physiographic provinces: Sierra Madre Occidental (n = 59), Sierra Madre Oriental (n = 13) and Transversal Neovolcanic Belt (n = 6). The climate and elevation of these sites were described and compared via non-parametric Kruskal-Wallis and Bonferroni-Dunn tests (P ? 0.05).<br /><strong>Results:</strong> The presences of the spotted owls were both, dispersed and focallydistributed, over the geographic space in Mexico. The temperature and elevation variables have similar characteristics in the assessed physiographic provinces. To be noted, the precipitation variables showed significant differences among sites.<br /><strong>Limitations on study/implications:</strong> This study describes the environmental characteristics of the realized niche of the Mexican spotted owl; however, it isnecessary to investigate other habitat variables at a smaller scale.</p> <p><strong>Findings/conclusions:</strong> The temperature and elevation environmentalcharacteristics of the ecological niche of the Mexican spotted owl was similar between physiographic provinces.</p> Manuel Armando Salazar Borunda, Luis Antonio Tarango Arámbula, Pablito Marcelo López Serrano, Jorge Armando Chávez Simental, Genaro Olmos Oropeza, José Hugo Martínez Guerrero, Martin Emilio Pereda Solis Derechos de autor 2021 Agro Productividad https://revista-agroproductividad.org/index.php/agroproductividad/article/view/2020 Thu, 22 Jul 2021 00:00:00 +0000 Feeding ecology of the catfish Ictalurus punctatus (Siluriformes: Ictaluridae) in a reservoir in Northeast Mexico https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1931 <p><strong>Objective: T</strong>o determine the main food of the catfish according to seasonal variability and the sex of the<br />organism in the Venustiano Carranza Dam, Coahuila, Mexico.<br /><strong>Methodology:</strong> In total, 143 catfish stomachs from different seasons were examined. In the analysis of the stomach content, the detected organisms were determined until the taxonomic order rank. The seasonal and sex feeding variability were also analyzed. The Relative Importance Index and the Alimentary Index were applied. Non-parametric tests were carried out to compare stomach content between seasons and sexes.<br /><strong>Results: </strong>The total annual trophic spectrum for catfish consisted of 13 items, of which only the order Ephemeroptera was categorized as a frequent food. In the winter season the catfish consumed significantly more food compared to the other seasons, but there was no difference in the amount consumed by females and males (p&gt;0.05).<br /><strong>Implications: </strong>This information is relevant to highlight the importance of the biological integrity of the terrestrial site which surrounds the reservoir as a source of food for the catfish.<br /><strong>Conclusions:</strong> Catfish channel in the Venustiano Carranza Dam is a generalist species (13 alimentary items). There was a difference in food consumed during the different seasons of the year. However, there was no difference between the sexes.</p> GABRIEL FERNANDO CARDOZA MARTINEZ, Cristo A. Bojórquez-Moreno, Alexander Czaja, Jorge L. Becerra-López, Miguel A. Garza-Martínez, Josué R. Estrada-Arellano, Julián Cerano-Paredes, José L. Estrada-Rodríguez, Fernando Alonzo-Rojo Derechos de autor 2021 Agro Productividad https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1931 Thu, 22 Jul 2021 00:00:00 +0000 Modelling potential distribution of the endemic ringtail (Bassariscus astutus saxicola) on an island of the Gulf of California https://revista-agroproductividad.org/index.php/agroproductividad/article/view/2042 <p><strong>Objetivo: </strong>Analizar la topografía de la isla mediante modelos digitales de elevación (DEM) con a 30 m de resolución espacial y generar el primer modelo de distribución potencial para un carnívoro endémico de las islas del Golfo de California.</p> <p><strong>Diseño / Metodología / Enfoque: </strong>En este estudio se empleó el software Maxent para encontrar la distribución potencial del babisuri en la Isla Espíritu Santo. Los muestreos se realizaron en 2015–2016, los babisuris se muestrearon en ocho bahias en el oeste de la isla. Se capturaron un total de 74 individuos, con nueve recapturas.</p> <p><strong>Resultados: </strong>Las variables con mayores aportes a los modelos fueron elevación, aportando 71.6%; índice de carga de calor el 15% y la rugosidad del 11.8%. El modelo predice&gt; 0.5 probabilidades de presencia de este carnívoro en 3.018 hectáreas de la isla. Obtuvimos un valor alto de AUC (0.928), lo que indica que el modelo es exacto, y posteriormente lo confirmamos con un valor de pAUC = 1,917.</p> <p><strong>Limitaciones / Implicaciones del estudio: </strong>El hábitat del babisuri (<em>Bassariscus astutus saxicola</em>) era poco conocido principalmente porque es una especie endémica. Y no existe un artículo publicado que muestre su distribución dentro de la isla.</p> <p><strong>Conclusiones: </strong>Este modelo muestra que las variables topográficas son útiles para explicar la distribución potencial del babisuri, principalmente porque la topografía está relacionada con sitios que pueden ofrecer refugio termal, abundancia de alimento y rutas de escape de depredadores, entre otras características.</p> Gustavo Arnaud, Sarahi Sandoval, Jonatgan G. Escobar-Flores, Rigel Sansores Sánchez Derechos de autor 2021 Agro Productividad https://revista-agroproductividad.org/index.php/agroproductividad/article/view/2042 Thu, 22 Jul 2021 00:00:00 +0000 Diet and sexual segregation of desert bighorn sheep (Ovis canadensis mexicana Merriam) in Sonora, Mexico https://revista-agroproductividad.org/index.php/agroproductividad/article/view/2043 <p><strong>Objective:</strong> To determine the diet of the desert bighorn sheep and to identify differences<br />in its composition between sexes during the reproductive and sexual segregation periods.<br /><strong>Design/methodology/approach:</strong> The study was carried in the UMA Rancho Noche<br />Buena, Hermosillo, Sonora. The microhistological technique and a cell catalog of plants<br />from the study area were used to identify plant species present in fecal samples of<br />bighorn sheep. The relative frequency, the Shannon-Weaver diversity index and the<br />Kulczynski similarity index were determined by sex and period (reproductive and<br />segregation)<br /><strong>Results</strong>: The diet of bighorn sheep included 40 species, being herbaceous (36.1 ±4.4<br />%) and grasses (26.8 ±8.9 %) the most common. The diet of males during the<br />segregation period was mainly composed of grasses (36.2%) and female diet by<br />herbaceous (30%) and grasses (29.8%). No differences were found in the diversity of<br />the diet of males and females in the segregation period (H &amp;#39;= 1.0) and in general, their diets were very similar (80%).<br /><strong>Limitations/implications:</strong> To collect a greater number of fecal samples by sex and<br />period (reproductive and segregation) and to analyze the nutritional content of plants<br />consumed by bighorn sheep.<br /><strong>Findings/conclusions:</strong> In this study, the sexual segregation exhibited by the bighorn<br />sheep in the Wildlife Management and Conservation Unit Rancho Noche Buena was not<br />due to food preferences.</p> Fernando Isaac Gastelum-Mendoza, Luis Antonio Tarango-Arámbula, Genaro Olmos-Oropeza, Jorge Palacio-Núñez, Diego Valdez-Zamudio, Roberto Noriega-Valdez Derechos de autor 2021 Agro Productividad https://revista-agroproductividad.org/index.php/agroproductividad/article/view/2043 Thu, 22 Jul 2021 00:00:00 +0000 Hematological and biochemical profile of spider monkey (Ateles geoffroyi) in captivity https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1974 <p><strong>Objective:</strong> To estimate the hematological and biochemical reference values inMAteles geoffroyi individuals in captivity.</p> <p><strong>Methodology:</strong> Eleven males and 23 females were captured. We collected blood,from the coccygian vein; conventional techniques were used to analyze thesamples.<br /><strong>Results:</strong> mean corpuscular volume (MCV; P &amp;lt; 0.03), platelets (PLT; P &amp;lt; 0.04) were significantly higher in females than in males. In relation to biochemical blood values wasn’t significantly in male and female groups.<br /><strong>Limitations/Implications</strong>: hematological and biochemical reference values of A. geoffroyi are within normal health parameters, are between the ranges reported for other species of neotropical primates and can be used as a reference in for the management of the health of this species in captivity.<br /><strong>Conclusions:</strong> hematological and biochemical parameters of captive specimens of A. geoffroyi are described, which provide reference indicators for the management of the health of the species.</p> Carlos David Pérez Brígido, Dora Romero Salas, Anabel Cruz Romero, Ricardo Serna Lagunes, José Luis Bravo Ramos, Sokani Sánchez Montes, Sandra Cecilia Esparza González, Anabel Elisa Rodríguez Derechos de autor 2021 Agro Productividad https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1974 Thu, 22 Jul 2021 00:00:00 +0000 Migratory Seasonality and Phenology by Birds in a Temperate Forest with Two Disturbance Conditions https://revista-agroproductividad.org/index.php/agroproductividad/article/view/2061 <p><strong>Objective: </strong>The objective was to infer the effect of the variables phenology (migration-non-migration), seasonal (rainfall-dry season), sex and forest condition on the abundances of birds (resident-migratory) in a semi-preserved and disturbed oak pine forest.</p> <p><strong>Design/methodology/approach:</strong> It was carried out in Monte Tlaloc, State of Mexico, under two conditions of apparent disturbance, semi-preserved oak pine forest and disturbed oak pine forest. Ten bird samplings were carried out with "count on point" with a fixed radius of 25 m, covering the 4 seasons of the year and migratory periods. With the previous data, the Relative Abundance Index (RAI) was estimated. To infer the effect of the variables phenology, seasonality, sex and forest condition on the abundances of birds, generalized linear models were elaborated.</p> <p><strong>Results: </strong>The IAR of the birds registered in the semi-considered pine forest indicates that the species with the lowest presence was <em>Aphelocoma ultramarina</em> (0.002) and with the highest frequency<em> Empidonax sp</em>. (0.13), unlike to that found in the disturbed pine forest where the lowest IAR corresponded to <em>Colaptes auratus</em> (0.003) and with the highest appearance was <em>Ptiliogonys cinereus</em> (0.23). The Generalized Linear Model suggested that forest condition and phenology are significantly related to the frequency of species.</p> <p><strong>Limitations on study/implications: </strong>In this study it was found that the abundance of birds was affected by the condition of the forest and that the phenology (migration-non-migration), seasonal (rain-dry season), sex and condition of the forest were related to the abundance of birds. Four species classified as under Special Protection and two Threatened according to NOM-059 were registered as well as the presence of four endemic species which highlights the importance of conserving these ecosystems.</p> <p><strong>Findings/conclusions:</strong> The fauna communities present in Monte Tláloc highlight the importance of conserving the pine-oak forests since this site is part of the Eje Neovolcanico Transversal.</p> Yessenia Cruz-Miranda, Luis A. Tarango-Arámbula, Jonathan G. Escobar-Flores, Genaro Olmos-Oropeza, Leonardo Chapa-Vargas Derechos de autor 2021 Agro Productividad https://revista-agroproductividad.org/index.php/agroproductividad/article/view/2061 Thu, 22 Jul 2021 00:00:00 +0000 Wild turkey (Meleagris gallopavo mexicana) monitoring: Innovation in sampling and estimator of population density https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1982 <p><strong>Objective:</strong> To estimate the population of wild turkey (Meleagris gallopavo, mexicana) and its density in ecosystems of its distribution.<br /><strong>Design / methodology / approach:</strong> A method based on random sampling with a population density estimator was designed. The design was based on the observation of wild turkeys that go to attraction sites (feedlots) of 2,500 m 2 (50 X 50 m) counted in 12 h a day, three consecutive days. For the total of random sites, the criterion of one site for every 300 ha of surface under study was used. The study was carried out on March 1, 2 and 3, 2019 in 3,000 ha of pine-oak forest, in Monte Escobedo, Zacatecas, Mexico. Observations were made from a fixed point 25 m from each site, from 6:00 a.m. to 6:00 p.m. The attraction sites were located at a random distance within 10 systematically fixed transects in the study area.<br /><strong>Results:</strong> The results showed a population of 66 turkeys in 3,000 ha, with a density of 0.022 turkeys ha -1 .</p> <p><strong>Limitations / implications:</strong> The application of the method was useful for the monitoring of wild turkey in the pine-oak forest, showing that it is a method that does not affect the population, which does not require long sampling times, is reliable, low-cost, and easy to carry out. The method is not reliable in ecosystemsthat do not allow the location of high visibility sites.<br /><strong>Findings / conclusions:</strong> Considering the distribution of wild turkey in Mexico, the method is a new alternative applicable to population studies of wild turkey.</p> Fernando Clemente-Sánchez, Octavio C. Rosas-Rosas, Luis A. Tarango-Arámbula Derechos de autor 2021 Agro Productividad https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1982 Thu, 22 Jul 2021 00:00:00 +0000 Cost-benefit analysis for the production of juveniles of tropical gar (Atractosteus tropicus Gill): a comparison of four feeding schemes. https://revista-agroproductividad.org/index.php/agroproductividad/article/view/2030 <p><strong>Objective</strong>: To determine the production cost and profitability of different feeding<br />strategies during the tropical gar larviculture<br /><strong>Design/methodology/approach:</strong> Growth and survival obtained from the evaluation<br />of an experimental diet with maize starch, comparing against the conventional<br />strategy (commercial diet for rainbow trout and co-feeding with Artemia naupliii). The<br />experimental diet was evaluated with co-feeding with Artemia and with no Artemia.<br />The productions cost was estimated for each strategy and was calculated the unit<br />cost by juvenile as well as the sale cost. We also determined the cost-benefit relation<br />and the breakeven point for the economic analysis.</p> <p><strong>Results:</strong> The direct feeding with no Artemia strategy during the larviculture is not<br />profitable. According to the relation cost-benefit, comparing the strategy with the<br />experimental diet in co-feeding with the conventional strategy, the profitability of the<br />first was greater. The breakeven point between the profitable strategies was similar,<br />but the greater survival with the experimental diet suggest a higher impact on the<br />optimization of the product system.<br /><strong>Limitations on study/implications:</strong> the lack of economic analysis on the tropical gar<br />larviculture affect indirectly the product system tropical gar as there is no accurate information on production costs.<br /><strong>Findings/conclusions:</strong> From a financial point of view, the feeding strategy using<br />experimental diet with co-feeding is the most profitable process of larviculture.</p> David J. Palma-Cancino, Carlos A. Álvarez-González, Fernando Vega-Villasante, Manuel Vargas-Ceballos, Emyr Peña-Marin, Edith A. Castillo-Arias, Rafael martinez garcia Derechos de autor 2021 Agro Productividad https://revista-agroproductividad.org/index.php/agroproductividad/article/view/2030 Thu, 22 Jul 2021 00:00:00 +0000 Productive performance and carcass characteristics of New Zealand white and California rabbits and their crosses https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1916 <p><strong>Objective:</strong> Evaluate the growth performance and carcass characteristics as well as the individual and maternal heterosis effects of New Zealand White (NZB), California (CA) rabbits and their crosses.<br /><strong>Design/methodology/approach:</strong> 450 offspring rabbits, from 48 females mated to 6 stud rabbits, were evaluated, recording the weight (PNC) and litter size at birth (TCN) and at weaning (TCD), as well as, and weight (PMS), weight gain (GMD), consumption (CMS), and feed conversion (CONV) for during 8 weeks post-weaning. The carcass live weight at slaughter, warm carcass weight with head, carcass yield, and carcass parts of the carcass were evaluated.<br /><strong>Results:</strong> Showed differences (p &amp;lt;0.05) in TCN and TCD with values of 10.47 and 9.03 kits, respectively. When NZB was used as the paternal breed, obtaining an individual heterosis of 5.91% for litter size and 12.44% for weaning weight. In the productive performance and carcass characteristics, the superiority of the California breed as a paternal breed was evidenced, with average values of 36.05 g in GMD and 2.95 kg in CONV. The average<br />individual weight at the end of the fattening, at 70 days of age, was 2.09 kg and the weight of the carcass 1.16 kg. Post-weaning heterosis for the characteristics evaluated during fattening was were positive and moderate.<br /><strong>Limitations on study/implications:</strong> It is necessary to carry out genetic improvement studies, with different crossing systems and to evaluate results based on the productive and reproductive behavior.<br /><strong>Findings/conclusions:</strong> in reproductive characteristics, when using NZB as a<br />paternal breed, the offspring are superior to those obtained from CA; while in<br />the productive variables, the offspring from CA show superior results.</p> Mario Enrique Macias-Fonseca, J.G. Herrera – Haro, A. Pro – Martínez , M.E. Ortega – Cerrilla, B. Ruíz – Sesma Derechos de autor 2021 Agro Productividad https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1916 Thu, 22 Jul 2021 00:00:00 +0000 Lactation curve, milk production of Pelibuey ewes and preweaning growth rate of the lambs https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1850 <p><strong>Objective</strong>: To estimate the lactation curve and milk production of Pelibuey ewes and<br />the relationship with preweaning growth rate of the lambs.<br /><strong>Design/methodology/approach</strong>: Forty five Pelibuey ewes were milked during 70<br />days in Montecillo, México, in 2018, to estimate daily and total milk production. The<br />lactation curve was fitted with the incomplete gamma function. In addition, the effects<br />of type of birth and ewe weight at milking on milk production were analyzed, and<br />correlations were calculated between ewe milk production and growth rate of the<br />lambs, per week and for the entire lactation</p> <p><strong>Results:</strong> A “typical” lactation curve was found, average ewe milk production for the<br />entire lactation, weighted for the number of lambs suckling, was 131±8 L, with<br />444±24 g d -1 . Ewe weight at milking had an effect (p&amp;lt;0.01) on milk production.<br />Positive correlations were found (p&amp;lt;0.05) between ewe milk production and<br />preweaning growth rate of the lambs.<br /><strong>Limitations on study/implications:</strong> There is a strong dependency of the lambs for<br />the milk production of the Pelibuey ewe, a factor of great relevance so that lambs can<br />gain body weight and survive during lactation.<br /><strong>Findings/conclusions:</strong> Pelibuey ewes produce less milk than dairy ewes. Therefore,<br />lambs should be weaned at a maximum of 10 weeks of lactation.</p> Hugo Andrés Rodríguez-Álvarez, José Alfonso Hinojosa-Cuéllar, Roberto González-Garduño, Jaime Gallegos-Sánchez, Moisés Rubio-Rubio, Emilio Manuel Aranda-Ibáñez, Jorge Oliva-Hernández, Glafiro Torres-Hernández Derechos de autor 2021 Agro Productividad https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1850 Thu, 22 Jul 2021 00:00:00 +0000 Defecation rates of white-tailed deer (Odocoileus virginianus) based on fiber content in feces https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1987 <p><strong>Objective:</strong> To develop three models in order to estimate the defecation rate of<br />white-tailed deer (Odocoileus virginianus) according to the season of the year,<br />content of neutral detergent fiber (NDF), and acid detergent fiber (ADF) in feces.<br /><strong>Design / methodology / approach:</strong> Nine captive adult deer were assigned to<br />three levels of dietary fiber. Fecal groups (defecation rate) were counted, forage<br />consumption was estimated, and feces were analyzed for NDF and ADF content. A<br />randomized block design was used, where the effect of the treatments was blocked<br />by season, and a multiple regression analysis was used to define the prediction<br />models of the defecation rates.<br /><strong>Results:</strong> The rates were different for dietary fiber levels (p&amp;lt;0.0001), and for the<br />year season (p = 0.0007). For spring, the defecation rate model (DR) was DR = -4.84696 - [0.02159 (NDF)] + [0.58397 (ADF)]; for summer DR = -51.0272 +[0.26868 (NDF)] + [1.61121 (ADF)]; and for winter DR = 7.82939- [0.02667 (NDF)]+ [0.17309 (ADF)].<br /><strong>Limitations / implications:</strong> Defecation rate or fecal group counting is a useful tool<br />to estimate deer populations. Nevertheless, the definition of an adequate<br />defecation rate represents a hard task, since it depends on various factors such as<br />the environmental conditions, and the components of the diet the deer consumes.<br /><strong>Findings / conclusions:</strong> The defecation rate varies depending on the year season<br />and the fiber content in the diet.</p> Dania M. Vega-Hernández, Fernando Clemente-Sánchez, María M. Crosby-Galván, Ricardo Bárcena-Gama, Genaro Olmos-Oropeza Derechos de autor 2021 Agro Productividad https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1987 Thu, 22 Jul 2021 00:00:00 +0000 Andrological characteristics of tropical milking criollo bulls https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1930 <p><strong>Objective:</strong> To assess the testicular and semen characteristics in Criollo Lechero<br />Tropical (CLT) bulls in the subhumid Mexican tropics.<br /><strong>Design/methodology/approach:</strong> Eight bulls were included in the study and distributed<br />in two groups: G1 (n=5): young bulls and G2 (n=3): adult bulls. All bulls were managed<br />under grazing and were evaluated throughout one year. From each bull the following<br />measurements were taken once a month: live weight, body condition score, scrotal<br />circumference, and testicular width, length and volume. Semen was obtained every 3<br />months via artificial vagina. Semen variables evaluated in each collection were: aspect,<br />volume, mass and individual motility, and sperm concentration and morphology.</p> <p><strong>Results:</strong> Live weight and testicular measurements increased linearly during the study in<br />bulls from both groups. All bulls had scrotal circumference larger than the minimum<br />threshold value for cattle and semen of high quality.<br /><strong>Study limitations/implications</strong>: The low availability of CLT bulls prevented the<br />inclusion of a larger number of animals in the study. This low availability of animals<br />makes it necessary to establish standard values for testicular measurements and semen<br />characteristics in the CLT breed in order to select the best individuals as sires and<br />contribute to its conservation.<br /><strong>Findings/conclusions:</strong> The CLT bulls had good scrotal circumference and semen<br />quality since a young age and into adulthood. These traits make the CLT bulls an<br />important alternative for livestock breeding in the tropics.</p> Ponciano Pérez-Hernández, Andea G. Estrella-García, Rodolfo Canseco-Sedano, Silvia Lopez-Ortiz, Concepción Ahuja-Del Carmen, Jonathan Guerrero-Hernández Derechos de autor 2021 Agro Productividad https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1930 Thu, 22 Jul 2021 00:00:00 +0000 Productive achievements in backyard poultry projects funded by the strategic program for food security at Tepecoacuilco, Guerrero, Mexico https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1885 <p><strong>Objective:</strong> To identify the socioeconomic factors in Tepecoacuilco, Guerrero that favored food production<br />and family income that improves their food security via backyard poultry projects.<br /><strong>Methodology:</strong> 31 families with backyard poultry projects for chicken meat and egg production were surveyed<br />and their information complemented with two participatory workshops.<br /><strong>Results:</strong> The average area of the backyards per family was 48.27 m<sup>2</sup> and 25.3 m<sup>2</sup> out of<br />them were used for the supported projects. It was found that only 16.1% of the studied<br />projects are in operation y families with active projects had improvements in their diet<br />since their consumption of eggs and healthy meats. Regarding egg production, an<br />annual average of 187.2 kg was obtained in operating projects.<br /><strong>Limitations:</strong> The conditions of local violence in the study region limited the possibility of<br />interviewing all the beneficiaries selected in the sample.</p> <p><strong>Conclusions:</strong> The beneficiaries improved their family diet with the financed projects,<br />however, results indicate that family needs are not yet fully satisfied since the<br />beneficiaries still continue to buy eggs that they consider essential for their intake. The<br />projects had null o little contribution to household income.</p> Irad Jared Reza-Solis, Aurelio León-Merino, Esteban Valtierra-Pacheco, Martín Hernández-Juárez, Vinicio Haracio Santoyo-Cortes Derechos de autor 2021 Agro Productividad https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1885 Thu, 22 Jul 2021 00:00:00 +0000 Advances and Perspectives in Research on Buffalo Milk Production and Mozzarella Cheese https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1868 <p><strong>Objective:</strong> To conduct a bibliographic review of the inventory and distribution of the buffalo herd, leading dairy buffalo breeds, and to map the main research topics for dairy buffaloes, emphasizing feeding methods and their effects on milk and mozzarella cheese quality.<br /><strong>Design/Methodology/Approach:</strong> Analysis of the main research topics on dairy buffalo, through a wide review of specialized journals.<br /><strong>Results:</strong> The production and processing of buffalo milk has gained relevance in recent years along different latitudes thanks to its nutritional qualities and the international regard for products such as mozzarella cheese. The main studies are carried out in Asia, Italy, and Brazil, emphasizing that diets are a determining factor in yield and quality of milk and its derivatives, but that genetics, environment, and animal management<br />are what in the end model these characteristics.<br /><strong>Study Limitations/Implications</strong>: To conduct further research on dairy buffalo, especially in Mexico, where it has important development opportunities.<br /><strong>Findings/Conclusions:</strong> The bibliographic body of work presents practical restrictions, advances are recognized, and also the need to further research topics such as reproduction and animal welfare, management and valuation of buffalo milk and its derivatives, with the opportunity to explore organic production.</p> Fabio Napolitano, Daniel Mota-Rojas, Giuseppe De Rosa, Adolfo Guadalupe Alvarez Macias, Ada Braghieri, Aldo Bertoni , Karla Flores, Jocelyn Gómez, Gisela López, Isabel Guerrero-Legarreta, Francesco Serrapica Derechos de autor 2021 Agro Productividad https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1868 Thu, 22 Jul 2021 00:00:00 +0000 Agronomic Evaluation and Physiological Quality in Triticale, under Two Production Systems in the Laguna Region https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1855 <p><strong>Objective:</strong> To evaluate ten triticale genotypes to assess the quality of the seeds under two production systems, with cut and without cut, in the municipalities of Matamoros (L1) and Francisco I. Madero (L2), Coahuila,Mexico.<br /><strong>Design/Methodology/Approach:</strong> The agronomic variables evaluated were: Grain yield (GY), number of seeds per spike (NSS), spike length (SL), number of spikelets per spike (SS) and plant height (PH). Variables in the laboratory were: normal seedlings (NS), abnormal seedlings (AS), seeds without germinating (SWG), dry seedling weight (DW), plumule length (PL) and radicle length (RL). Statistical analysis was performed with the PROC ANOVA procedure, of the SAS software.<br /><strong>Results:</strong> A higher grain yield was found for Matamoros (L1) compared to Francisco I. Madero (L2); however,for the variable number of seeds per spike it was higher in the latter (L2). For the physiological quality of seeds in L2, the highest values were in the variables normal seedlings and radicle length. In the comparison of production systems, the best response was for the system without cut in both locations; therefore, good quality triticale seed can be produced with acceptable grain yield.<br /><strong>Study Limitations/Implications:</strong> It is necessary to describe the performance of triticale in the springsummer agricultural cycle in the central region of the country.<br /><strong>Findings/Conclusions:</strong> The productive performance of triticale genotypes was variable depending on the production system, and there was also a different effect on the physiological quality of the harvested seed</p> Ruben Lecona-Garcia , Antonio Flores Naveda, Alejandro J. Lozano-del-Rio , Norma Angélica Ruiz-Torres , Mario Ernesto Vázquez-Badillo Derechos de autor 2021 Agro Productividad https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1855 Thu, 22 Jul 2021 00:00:00 +0000 Analysis of the environmental impact generated by backyard swine production in Tepetlán, Veracruz, Mexico https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1875 <p><strong>Objective:</strong> To identify and estimate waste production, water consumption and production practices of backyard swine farms at the municipality of Tepetlán; Veracruz, Mexico, to foresee the possible influences on the environment and generate information that promotes new public environmental policies adapted to small producers.<br /><strong>Methodology:</strong> 36 backyard livestock production units were identified and studied in Vicente Guerrero and Alto Tío Diego by a census in which structured surveys were applied to obtain data; the results were analyzed by descriptive statistics. The maximum pollutant potential of the load with the installed infrastructure was estimated.<br /><strong>Results:</strong> We registered 503 swine heads of diverse zootechnical functions, mainly from the Landrace breed, in 36 studied farms, 54.7% of idle infrastructure was identified. We found that about three tons of excreta are produced per day between the towns of Vicente Guerrero and Alto Tío Diego, from which 78% are dumped into the municipal drainage. The average water consumption per unit of livestock production was 132.2 L<br />and for each unit of animal population 28.5 L, with a standard deviation of 32.2 L per animal population unit. This research also provides information on the feeding and production practices of the animals. It was possible to estimate the volume of swine excreta generated in the assessed localities. However, it is necessary to quantify organic matter, nitrogenous products, phosphorus, and total and fecal coliforms.<br /><strong>Conclusions:</strong> It is important to quantify and regulate the generated waste by this livestock activity, to take corrective and regulatory decisions, to establish solutions that protect natural resources without harming the economy of the small producer.</p> Miguel Á. Solís-Tejeda, Fabiola Lango-Reynoso, María del R. Castañeda-Chávez, Laura C. Ruelas-Monjardin Derechos de autor 2021 Agro Productividad https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1875 Thu, 22 Jul 2021 00:00:00 +0000 Reproductive evaluation of Charolais and Charbray bulls on the reproductive efficiency of herds in warm subhumid climate of Veracruz https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1936 <p><strong>Objective:</strong> To correlate the Breeding Soundness Evaluation (BSE) of Charolais and<br />Charbray bulls in the warm subhumid climate and its effect on the Pregnancy rate and<br />Calving interval of herds to estimate differences between breeds.<br /><strong>Design/methodology/approach</strong><em>:</em> BSE was carried out on N = 90 Bulls; Charolais (n =33) and Charbray (n = 57), evaluated in situ during the period 2017 to 2019. Bull (age, body condition, libido, and scrotal circumference), Semen (concentration, motility, and volume), Herd (Pregnancy rate and Calving interval) and environment variables (Rainy and Dry season) were analyzed with the one-way ANOVA, Factorial, Multiple regression, and Multivariate analysis.<br /><strong>Results:</strong> Charolais and Charbray bulls show similar results in the BSE (p&amp;gt;0.05) in a<br />warm subhumid climate.<br /><strong>Limitations/implications:</strong> Year season (Rainy or Dry) do not affect (p&amp;lt;0.05) the BSE<br />rating. Libido is associated (p&amp;lt;0.05) with age (R=-0.42), sperm motility (R=0.67), sperm<br />concentration (R=0.66) and pregnancy rate (R=0.63).</p> <p><strong>Findings/conclusions:</strong> Variables with high association (p&amp;lt;0.05) with pregnancy rate<br />were libido (R=0.63), motility (R=0.60), sperm concentration (R=0.51) and age (R=-<br />0.50); variables with high association (p&amp;lt;0.05) with calving interval were: age (R=0.74)<br />and libido (R=-0.33). Charolais and Charbray bulls show similar reproductive efficiency<br />in herds under a warm subhumid climate in Veracruz.</p> Victor Fernando Torres-Aburto, Antonio Hernandez-Beltran, Patricia Cervantes-Acosta, Manuel Barrientos-Morales, Arrieta Gonzalez-Armando, Araceli Rodriguez-Andrade, Herminio Hernández-Flores, Belisario Dominguez-Mancera Derechos de autor 2021 Agro Productividad https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1936 Thu, 22 Jul 2021 00:00:00 +0000 Recommendation of Choline Inclusion in Lambs’ Diet https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1951 <p><strong>Objective:</strong> To establish an inclusion recommendation for choline (herbal or synthetic) in fattening lambs’diet based on productive performance and blood metabolites.<br /><strong>Design/Methodology/Approach:</strong> A literature review was carried out of herbal and synthetic choline supplementation in the diet of fattening lambs.<br /><strong>Results:</strong> The addition of protected choline chloride (50% purity) in the lamb’s diet should be less than 2.5g/kg DM in order not to cause a detrimental effect on the productive performance. On the other hand, the inclusion of herbal choline in lambs’ diet should be greater than 6 g/kg DM to have positive effects on body gain and feed conversion.<br /><strong>Study Limitations/Implications:</strong> It is necessary to establish the requirement for choline in fattening lambs because studies where choline is supplemented show that the contribution of conventional ingredients is insufficient.<br /><strong>Findings/Conclusions:</strong> The inclusion of herbal (6 g/kg DM) and synthetic (2.5 g/kg DM) choline in lambs’ diet improves body weight gain and modifies energy metabolites</p> Martínez Aispuro José Alfredo, María Teresa Sánchez-Torres Esqueda, Figueroa Velasco José Luis, Cordero Mora José Luis Derechos de autor 2021 Agro Productividad https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1951 Thu, 22 Jul 2021 00:00:00 +0000 Factors Associated with the Onset of Ovarian Activity of Cattle Commonly Reared in the Huasteca Veracruzana, Mexico https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1852 <p><strong>Objective:</strong> To identify the factors that affect the onset of ovarian activity in prepuberal heifers in the Huasteca Veracruzana of Mexico.<br /><strong>Design/Methodology/Approach:</strong> Samples were taken from animal production units of the municipality of Tantoyuca, Veracruz. The onset of ovarian activity was determined by the presence of ovarian follicles andncorpus luteum by ultrasonography technique. Zoometric indices and body condition were calculated at them same time, and the zootechnical practices that were applied to the animals in the last six months before the<br />sampling day were registered. A survey was applied to characterize the management of animal productionunits; the main topics in the survey were: health, reproduction, nutrition, and suckling. All animals available within selection criteria in the production units were sampled. A multiple linear regression (Statistical Analysis Software Version 9.4) and cluster analysis (R Studio Version 1.1.419) were used to identify the main categorical variables that affected the model.<br /><strong>Results:</strong> The onset of ovarian activity depends mainly on the anatomical development of the heifers. The biostimulation (male effect) on the heifers has an important effect on reducing the age at puberty.<br /><strong>Study Limitations/Implications</strong>: The study was developed during a long drought period in the region.<br /><strong>Findings/Conclusions:</strong> The genetic mosaic of the evaluated animals in the production units did not affect the onset of ovarian activity of the heifers; however crossbred heifers (Bos taurus ? Bos indicus) begin the ovarian activity younger.</p> Luciano Olivares-Sixto, Karla L. Silva-Martínez, Claudio Vite-Cristóbal, Oscar Del Ángel-Piña, Armando Arrieta González Derechos de autor 2021 Agro Productividad https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1852 Thu, 22 Jul 2021 00:00:00 +0000