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San Jose del Torreon, Mexico

Alvarado-Espino A.S.,Antonio Narro Agrarian Autonomous University | Meza-Herrera C.A.,National Autonomous University of Mexico | Carrillo E.,Technological Institute of Torreon | Gonzalez-Alvarez V.H.,Antonio Narro Agrarian Autonomous University | And 4 more authors.
Animal Reproduction Science | Year: 2016

This study aimed to determine the possible effects of a single injection of human chorionic gonadotropin (hCG) as a means for estrus induction in acyclic French-Alpine goats during the reproductive transition period at 25°N, 103°W. The potential effects of hCG upon ovarian function and reproductive performance of goats were also assessed. Multiparous acyclic French-Alpine goats (n = 39; 37.4 ± 8.5 kg) were primed with 20 mg progesterone (P4) 1 day prior to hCG administration. Thereafter, does were treated either with saline (hCG-0; n = 10), 50 (hCG-50; n = 9), 100 (hCG-100; n = 10), or 300 IU of hCG (hCG-300; n = 10). Ovarian structures and pregnancy were monitored by transrectal ultrasonography. In addition, after hCG application, goats were monitored twice daily (0800 and 1800 h) to detect estrus signs, with the use of aproned, sexually active bucks treated with testosterone. Goats were bred 12 h after the onset of estrus. Two days after hCG administration, the number of large follicles was higher (P < 0.05) in the hCG-50 and hCG-300 groups (1.7 ± 0.1 and 1.8 ± 0.2, respectively) compared with the hCG-100 and hCG-0 groups (1.4 ± 0.2 and 1.1 ± 0.1, respectively). Although none of the hCG-0-goats depicted estrus, the estrus response from the hCG-50, hCG-100, and hCG-300 groups over the 7-d breeding period was 67%, 100%, and 90%, respectively (P > 0.05), being always accompanied by ovulation. Pregnancy rate (67, 100, and 70%), kidding rate (55%, 80%, and 70%), and litter size (1.6 ± 0.5, 1.5 ± 0.5, and 1.5 ± 0.5) for hCG-50, hCG-100, and hCG-300, respectively, did not differ among the hCG-treated does. Therefore, the combined use of P4-priming plus a 100-IU hCG injection is an effective protocol for inducing estrus in non-cycling Alpine goats during the anestrus-to-estrus transition period, which is of key importance for both goat producers and industrializers. © 2016 Elsevier B.V. Source

Garcia Carrillo L.R.,Compiegne University of Technology | Rondon E.,Compiegne University of Technology | Sanchez A.,CINVESTAV | Dzul A.,Technological Institute of Torreon | And 2 more authors.
Journal of Intelligent and Robotic Systems: Theory and Applications | Year: 2011

We propose a vision-based position control method, with the purpose of providing some level of autonomy to a quad-rotor unmanned aerial vehicle. Our approach estimates the helicopter X-Y-Z position with respect to a landing pad on the ground. This technique allows us to measure the position variables that are difficult to compute when using conventional navigation systems, for example inertial sensors or Global Positioning Systems in urban environment or indoor. We also present a method to measure translational speed in a local frame. The control strategy implemented is based on a full state feedback controller. Experimental results validate the effectiveness of our method. © 2010 Springer Science+Business Media B.V. Source

Camacho F.,University of Almeria | Ricardez M.,Onudi Semarnat Mexico | Huitron M.V.,Technological Institute of Torreon
Acta Horticulturae | Year: 2011

Grafting of vegetables is considered an eco-compatible alternative to soil disinfection with methyl bromide (MB) and it generates employment. Two experiments for watermelon and two experiments with melon were carried out in soils infected with Fusarium oxysporum f. sp. melonis; Olpidium bornovanus and Melon necrotic spot virus (MNSV) in Colima, Mexico. Every experiment had ungrafted plants in disinfected soil with MB, and grafted plants in soil without disinfection. The commercial rootstocks 'RS8441' and 'Shintosa Camelforce' (Cucurbita maxima Duchesne × Cucurbita moschata Duchesne) were used. The experimental design was a randomized complete block with four replications. Plant density for ungrafted watermelon plants was 0.35 plants·m -1, whereas for ungrafted melon plants was 1.85 plants·m -1. Plant densities for grafted plant were 80, 60, and 50% in basis plant density of ungrafted plant. It was measured yield and quality fruit either grafted or ungrafted plants of watermelon and melon. Total yield was higher in both watermelon and melon grafted plants with 50-60% of usual plant density. Grafting improved the fruit quality by increasing the firmness fruit. Grafting improves yield without detrimental effects in fruit quality. Grafting can be an alternative to soil fumigation with MB in melon and watermelon production. Source

Carrillo E.,Technological Institute of Torreon | Meza-Herrera C.A.,National Autonomous University of Mexico | Veliz F.G.,Antonio Narro Agrarian Autonomous University
Revista Mexicana De Ciencias Pecuarias | Year: 2010

Limited data is available on reproductive seasonality in French Alpine goat bucks raised under intensive conditions in northern Mexico, at subtropical latitude (26° N). A study was done of eleven young French Alpine bucks subject to natural, regional photoperiod variations (13:41 h/light at summer solstice; 10:19 h/light at winter solstice). Animals were fed alfalfa hay (17% CP) ad libitum and a commercial supplement (14% CP) at 200 g animal-1 day-1 during the experimental period (December to September). Sperm motility increased (P<0.05) from 1.5 units from January to May to 2.5 units from July to September. Sperm viability also increased, from 25 % in January to May to 40 % in July to September. Ejaculate volume was 0.1 ± 0.03 ml ejaculate-1 from January to July, lower (P<0.05) than the 0.5 ± 0.04 ml ejaculate-1 recorded in August, September and December. Latency to ejaculate in an artificial vagina decreased (P<0.05) from 102 ± 7 sec in December to July, to 52 ± 1 sec in August and September. The studied French Alpine bucks exhibited seasonality in semen quality characteristics, body and testicular variables and sexual response, with generally lower variable values and less sexual activity from January to July followed by increased values and activity. Source

Marquez-Hernandez C.,Universidad Juarez del Estado de Durango | Santana S.,Instituto Nacional de Investigaciones Nucleares | Avila V.,Universidad Juarez del Estado de Durango | Garcia J.L.,Technological Institute of Torreon | Preciado P.,Antonio Narro Agrarian Autonomous University
Southwestern Entomologist | Year: 2014

Studies are lacking of entomofaunistic diversity studies in artificial ecosystems such as agroecosystems. It is estimated that in agroecosystems only 3% of the species behave as pests and 97% are auxiliary fauna. Transgenic cotton (Gossypium hirsutum L.) has a protein toxic against some lepidopterans; however, some studies mention that it harms other orders of insects. The purpose of this study was to identify the entomological diversity in transgenic cotton in the State of Coahuila, Mexico (25°49′25″N and 103°13′21″W). Entomological net, pitfall traps, and direct sampling were used each week. All adults collected were identified to species per family and order and deposited in the entomological collection of the Biological Sciences Faculty of Juárez University of Durango State. In total, 570 specimens were collected, of which 192 seemed to be distinct species belonging to 57 families in 10 orders. The order with the most insects was Hemiptera with 40% of the specimens, followed by Hymenoptera and Coleoptera, with 22 and 19%, respectively. The orders with the most species were Hymenoptera with 42% and Hemiptera with 30%. The families with the greatest numbers of insects were Cicadellidae with 140 and Curculionidae with 47. The families with the most species were Sphecidae with 15, Cicadellidae with 14 and Formicidae with 13. Only one insect was collected from each of 16 families. Source

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