A multi-criteria approach to identify favorable areas for goat production systems in Veracruz,México     

Emmanuel de Jesús Ramírez-Rivera  Jose Lopez-Collado  Pablo Díaz-Rivera  Eusebio Ortega-Jiménez  Glafiro Torres-Hernández  Jazmín Jacinto-Padilla  Erasmo Herman-Lara 《Tropical animal health and production》2017,49(4):725-731

This research identifies favorable areas for goat production systems in the state of Veracruz, Mexico. Through the use of the analytic hierarchy process, layers of biophysical and soil information were combined to generate a model of favorability. Model validation was performed by calculating the area under the curve, the true skill statistic, and a qualitative comparison with census records. The results showed the existence of regions with high (4494.3 km²) and moderate (2985.8 km²) favorability, and these areas correspond to 6.25 and 4.15%, respectively, of the state territory and are located in the regions of Sierra de Huayacocotla, Perote, and Orizaba. These regions are characterized as mountainous and having predominantly temperate-wet or cold climates, and having montane mesophilic forests, containing pine, fir, and desert scrub. The reliability of the distribution model was supported by the area under the curve value (0.96), the true skill statistic (0.86), and consistency with census records.  相似文献   

Random pattern of parasitism and female-biased sex ratio in the egg parasitoid <Emphasis Type="Italic">Neochrysocharis formosa</Emphasis> attacking the pine sawfly <Emphasis Type="Italic">Diprion pini</Emphasis> in mountain forests of Spain     

Jesús Selfa  Carlo Polidori  Josep Daniel Asís  Luis De Pedro  Juli Pujade-Villar  José Tormos 《Phytoparasitica》2017,45(1):85-93

The most harmful hymenopteran pests of Pinus sylvestris L. are conifer sawflies from the family Diprionidae, including the widespread Diprion pini (L.). Natural enemies of this pest are still poorly known in many European areas where attacks occur. We studied the egg parasitoids of D. pini at four sites in two mountainous areas of Spain: the Sierra de Francia (western Spain) and the Sierra de Albarracín (eastern Spain). At all sites, the dominant egg parasitoid was Neochrysocharis formosa (Westwood) (Hymenoptera: Eulophidae), whereas other three chalcidoid species were rare. All these species were previously recorded in association with D. pini, but we report here their first record in Spain. Neochrysocharis formosa attacked up to 32.3% of egg clusters of D. pini in the Sierra de Albarracín and 18.5% in the Sierra de Francia. In the attacked egg clusters, this species parasitized up to 35% of eggs in the Sierra de Albarracín and 23.7% in the Sierra de Francia, with a marked female-biased sex ratio. Contrary to the clustered pattern of parasitism observed for N. formosa while attacking other gregarious diprionids, the oviposition in egg clusters of D. pini followed a random pattern, probably due to the froth roof (spumous coating) that covers its eggs and interferes with the egg-searching behavior of females. Indeed, other parasitoid species of D. pini have been reported to behave similarly.  相似文献   

Migration by seed dispersal of ACCase‐inhibitor‐resistant Avena fatua in north‐western Mexico          下载免费PDF全文

J Antonio Tafoya‐Razo  Juan Núñez‐Farfán  Jesús R Torres‐García 《Pest management science》2017,73(1):167-173

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A negative association between bromadiolone exposure and nestling body condition in common kestrels: management implications for vole outbreaks          下载免费PDF全文

Jesús Martínez‐Padilla  Jhon J López‐Perea  Rafael Mateo  Alfonso Paz  Javier Viñuela 《Pest management science》2017,73(2):364-370

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Estimation of preliminary reference values for macro and micronutrients in ‘Valencia’ orange in Venezuela,by means of the compositional nutrient diagnosis system     

Edwin A. Hernández-Caraballo  Wendy C. Bencomo-Fernández  Jesús Aular  Orlando Rodríguez-Rodríguez 《Communications in Soil Science and Plant Analysis》2018,49(15):1943-1952

The present study was aimed at developing preliminary reference values for foliar tissue for nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), copper (Cu), iron (Fe), manganese (Mn), and zinc (Zn) for `Valencia´ orange in Venezuela, using the Compositional Nutrient Diagnosis system (CND). References values were derived from a database comprising the nutrients concentrations and the yields of `Valencia´ orange trees (Citrus sinensis L. Osbeck) grafted on two different rootstocks, viz., Volkamer lemon (Citrus volkameriana Pasq.), and Cleopatra tangerine (Citrus reshni, Hort. ex. Tan). Cutoff values separating high- and low-yield sub-samples were estimated through modeling the cumulative variance ratio function versus yield relationships with the Boltzmann equation. For macronutrients, the norms developed were dependent upon the inclusion of the micronutrients concentrations in the calculations, and on the rootstocks. Care must thus be exercised, since nutrient indexes, and thus nutritional diagnosis, are based upon proper selection of such values.  相似文献   

Oxidative stress regulates the expression of the Pht cluster genes involved in phaseolotoxin synthesis in <Emphasis Type="Italic">Pseudomonas syringae</Emphasis> pv. <Emphasis Type="Italic">phaseolicola</Emphasis> NPS3121     

Alejandro Hernández-Morales  Jennifer Alexis Rojas-Morales  Marisol Reynoso-López  Abril Bernardette Martínez-Rizo  Jesús Bernardino Velázquez-Fernández  Jackeline Lizzeta Arvizu-Gómez 《Journal of General Plant Pathology》2018,84(2):137-141

This study evaluated the role of oxidative stress on the expression of Pht cluster genes involved in phaseolotoxin synthesis in Pseudomonas syringae pv. phaseolicola. Results demonstrate that the expression of Pht cluster genes is regulated by oxidative stress in a manner dependent of the ROS present in the cell. The presence of H₂O₂ and Paraquat, influences on the expression of the Pht cluster genes in function of the compound and of the concentration evaluated, demonstrating that expression of Pht genes is part of the oxidative stress response in P. syringae pv. phaseolicola NPS3121.  相似文献   

Functionality of Agave Bagasse as Supplement for the Development of Prebiotics-Enriched Foods     

Escobedo-García  Sarai  Salas-Tovar  Jesús A.  Flores-Gallegos  Adriana C.  Contreras-Esquivel  Juan C.  González-Montemayor  Ángela M.  López  Mercedes G.  Rodríguez-Herrera  Raúl 《Plant foods for human nutrition (Dordrecht, Netherlands)》2020,75(1):96-102

Plant Foods for Human Nutrition - Agave bagasse is a fibrous-like material obtained during aguamiel extraction, which is also in contact with indigenous microbiota of agave plant during aguamiel...  相似文献   

Shelter and lighting in the intensive rearing of juvenile crayfish (Pacifastacus leniusculus,Astacidae) from the onset of exogenous feeding     

Rocío González  Jesús Domingo Celada  Vanesa García  José Manuel Carral  Álvaro González  María Sáez‐Royuela 《Aquaculture Research》2011,42(3):450-456

Recent advances on feeding in intensive rearing of juvenile astacids enable research of other factors influencing growth and survival without the confounding effect of inadequate feeding. Two experiments were conducted to evaluate the effects of the number of shelters per crayfish and to test different lighting conditions. Stage 2 juvenile Pacifastacus leniusculus were stocked in fibreglass tanks and fed a dry diet for salmonids combined with restricted amounts of decapsulated Artemia cysts. In experiment 1, four, two or one shelters per crayfish were tested for 80 days. No significant differences were found among groups either in survival (final mean: 86.67%) or in growth [final mean: 11.41 mm mean carapace length (CL), 355.45 mg mean weight]. In experiment 2, three lighting conditions were tested for 120 days: continuous lighting of 925 lx, continuous darkness and natural photoperiod. Survival rates ranged from 76.7% to 88.3%, with no significant differences among groups. The crayfish kept under continuous darkness grew faster (final mean: 12.70 mm CL, 543.08 mg weight) than those reared under the other two light conditions. This study shows that, under improved feeding conditions, a minimum number of shelters can be provided, and faster growth can be obtained in continuous darkness.  相似文献   

Morphometric Relationship of Weight and Length of Cultured Freshwater Snail,Pomacea patula (Baker, 1922), at Three Different Life Stages     

Manuel García‐Ulloa  Maríadel Carmen Gallo‐García  Hervey Rodríguez‐González  Andrés Góngora‐Gómez  Jesús T. Ponce‐Palafox 《Journal of the World Aquaculture Society》2008,39(6):842-846

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Rhodamine-pink as a genetic marker for yeast populations in wine fermentation     

Ambrona J  Vinagre A  Maqueda M  Alvarez ML  Ramírez M 《Journal of agricultural and food chemistry》2006,54(8):2977-2984

Winemaking with selected yeasts requires simple techniques to monitor the inoculated yeast. New high-concentration rhodamine-resistant mutants and low-concentration rhodamine-pink mutants, easy to detect by replica-plate assay, were obtained from selected wine yeasts. The rhodamine-pink mutations were dominant and were located at the pdr5 locus that encodes for the Pdr5 ATP-binding cassette multidrug resistance transporter. The mutants were genetically stable but had lost the killer phenotype of the parent yeast strain. They were genetically improved by elimination of recessive growth-retarding alleles followed by crossing with selected killer wine yeasts. Several spore-clones were selected according to their must fermentation kinetics and the organoleptic quality of the wine. Some spore-clones were tested in industrial winemaking, and they were easily monitored during must fermentation using a simple color-plate assay. They accounted for >96% of the total yeasts in the must, and the resulting wine had as good a quality as those made with standard commercial wine yeasts. The rhodamine-pink yeasts may also be detected by direct seeding onto rhodamine agar or by observation under fluorescence microscopy. These possibilities greatly reduce the time of analysis and make the monitoring procedure for rhodamine-pink yeasts faster, easier, and cheaper than for the genetically marked wine yeasts obtained previously.  相似文献