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Agricultural Sciences 2015年第9期6卷 1014-1022页

作者： Jose Luis Arredondo-Figueroa laura georgina nunez-garcía Jesus T.Ponce-Palafox Irene de Los Angeles Barriga-Sosa Unidad Acuícola Departamento de ZootecniaUniversidad Autonoma de AguascalientesAguascalientesMéxico Planta Experimental de Produccion Acuicola Division de Ciencias Biológicas y de la SaludDepartamento de HidrobiologíaUniversidad Autónoma Metropolitana IztapalapaMéxicoD.F.México Centro de Innovación y Transferencia Tecnológica CENITT Posgrado CBAPEscuela Nacional de Ingeniería PesqueraUniversidad Autónoma de NayaritTepicMéxico

We present results of a long-term study aimed to optimize Nile tilapia O. niloticus production in a recirculating aquaculture system (RAS) in México City. Three experiments were evaluated: 1) fry production;2) production of masculinized fries;and 3) assessment of growth under three different densities (10, 30 and 75 fish/m3). The broodstock produced on average 2400 ± 600 fry every 15 days during six months, with a total production of 28,800 ± 2000. One hundred percent males were produced in 274-L raceways in an eight-week period. The obtained results in fish production in the RAS system indicated variations related to density. A daily growth rate of 3.6 g/day was registered with a density of 10 fish/m3, 0.9 g/day in 30 fish/m3 and 0.4 g/day in 75 fish/m3. This information could be useful for production purposes in this type of systems.

关键词： Tilapia Oreochromis niloticus Intensive Culture Sex Reversal Growth Densities

Reproductive performance of the Mesa silverside(Chirostoma jordani Woolman,1894)under natural and controlled photoperiods

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BIOCELL 2012年第3期36卷 105-111页

作者： JOSÉLUIS ARREDONDO-FIGUEROA laura georgina NÚÑEZ-garcÍA PALOMA ADRIANA HEREDIA-GUZMÁN JESÚS T.PONCE-PALAFOX Posta Zootécnica Departamento de ZootecniaCentro de Ciencias AgropecuariasUniversidad Autónoma de AguascalientesJesús MaríaAguascalientesMéxico Planta Experimental de Producción Acuícola Departamento de HidrobiologíaCBSUniversidad Autónoma Metropolitana IztapalapaMéxicoD.F Facultad de Estudios Superiores Iztacala Universidad Nacional Autónoma de MéxicoEstado de MéxicoMéxico Centro de Innovación y Transferencia Tecnológica CENITT Posgrado CBAPEscuela Nacional de Ingeniería PesqueraUniversidad Autónoma de NayaritTepicNayaritMéxico

Chirostoma jordani is a native annual species inhabiting lacustrine waters of the Central Mexico *** is widely distributed and is currently facing high environmental *** experi-ments were performed to study the reproductive performance of this *** of the experiments were conducted in 270-L indoor recirculation *** males and one female at the first stage of reproduction were included in each test.A photoperiod of 14 light hours and 10 dark hours was *** a fifth experiment,10 females and 15 males were kept in an outdoor 3,000-L recirculation tank under natural *** number of spawns,fertilised eggs and 30-day-old juveniles were counted and the survival rate was *** results indicated significant differences(P<0.05)between *** spawn numbers and greater egg production were observed under controlled photoperiod,and higher numbers of juveniles and a higher survival rate were observed under natural *** trials exhibited different patterns of egg produc-tion during the *** egg production in the natural-photoperiod trials followed a polynomial curve *** contrast,the trials under the controlled photoperiod showed an irregular pattern of increases and decreases in egg production.

关键词： breeding Atherinopsidae eggs juveniles survival rate

On the potential of documenting decadal-scale avifaunal change from before-and-after comparisons of museum and observational data across North America

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Avian Research 2022年第1期13卷 1-10页

作者： Fernando Machado-Stredel Benedictus Freeman Daniel Jiménez-garcia Marlon E.Cobos Claudia nunez-Penichet laura Jiménez Ed Komp Utku Perktas Ali Khalighifar Kate Ingenloff Walter Tapondjou Thilina de Silva Sumudu Fernando Luis Osorio-Olvera A.Townsend Peterson Biodiversity Institute and Department of Ecology and Evolutionary Biology University of KansasLawrenceKSUSA Centro de Agroecología y Ambiente Instituto de CienciasBenemérita Universidad Autónoma de PueblaPueblaPueblaMexico Information and Telecommunication Technology Center(ITTC) University of KansasLawrenceKSUSA Department of Biology(Zoology Section-Biogeography Research Lab.) Faculty of ScienceHacettepe UniversityBeytepeAnkaraTurkey Department of Ornithology American Museum of Natural HistoryCentral Park West at 79th StreetNew YorkNYUSA Departamento de Ecología de la Biodiversidad Instituto de EcologíaUniversidad Nacional Autónoma de MéxicoCiudad de MéxicoMéxico

Studies of biodiversity dynamics have been cast on either long(systematics)or short(ecology)time scales,leaving a gap in coverage for moderate time scales of decades to ***-scale biodiversity information resources now available offer opportunities to fill this gap for many parts of the world via detailed,quantitative comparisons of assemblage composition,particularly for regions without rich time series *** explore the possibility that such changes in avifaunas across the United States and Canada before and after the first three decades of marked global change(i.e.,prior to 1980 versus after 2010)can be reconstructed and characterized from existing primary biodiversity *** an illustration of the potential of this methodology for sites even in regions not as well sampled as the United States and Canada,we also explored changes at a single site in Mexico(Chichén-Itzá).We analyzed two large-scale datasets:one summarizing bird records in the United States and Canada before 1980,and one for the same region after *** used probabilistic inventory completeness analyses to identify sites that have avifaunas that have likely been inventoried more or less *** prepared detailed comparisons between the two time periods to analyze species showing distributional changes over the time period *** identified 139 sites on a 0.05°grid that were demonstrably well-inventoried before 1980 in the United States and Canada,of which 108 were also well-inventoried after *** presence/absence patterns between the two time periods for 601 bird species,we found significant spatial autocorrelation in overall avifaunal turnover(species gained and lost),but not in numbers of species *** noted potential northward retractions of ranges of several species with high-latitude(boreal)distributions,while other species showed dominant patterns of population loss,either rangewide(e.g.,Tympanuchus cupido)or regionally(e.g.,Thryomanes bewickii).We dev

关键词： Biodiversity dynamics Birds Climate change Inventory completeness Time scale Turnover

Evaluation of Growth Performance of a Genetically Characterized F1 Rainbow Trout,Oncorhynchus mykiss in a Recirculating Aquaculture System

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Agricultural Sciences 2017年第7期8卷 716-728页

作者： Jose Luis Arredondo-Figueroa Nayeli Ismene Armendáriz-Sáenz laura georgina Núnez-garcía Jesús Trinidad Ponce-Palafox Irene De Los Angeles Barriga-Sosa Posta Zootécnica Departamento de ZootecniaCentro de Ciencias AgropecuariasUniversidad Autónoma de AguascalientesJesús MaríaMéxico Planta experimental de Producción Acuícola Departamento de HidrobiologíaDivisión de Ciencias Biológicas y de la SaludUniversidad Autónoma Metropolitana IztapalapaIztapalapaMéxico Escuela Nacional de Ingeniería Pesquera Unidad de Bioingeniería CosteraUniversidad Autónoma de NayaritSan BlasMéxico

The growth performance of a selected F1 rainbow trout genetically characterized as polymorphic with locus Omy207UoG (NA = 13, PIC = 0.891, HE = 0.9003) was evaluated in a recirculating aquaculture system (RAS). A set of 157 rainbow trout of 37.8 g of mean body weight and 14.6 cm mean total length per tank, were introduced in each of six fish tank of 5 m3 connected to a recirculating aquaculture system (RAS). The trout was rearing during 317 days. Growth performance indicators and water quality were evaluated during the experiment. The genetically selected F1 rainbow trout showed a tendency towards homogeneity in growth performance along the culture period, reaching a mean total weight of 552.2 g. The length-weight relationship indicated an isometric growth (>3.0). This study presents the basis to establish a long-term marker-assisted selection program for rainbow trout culture in a subtropical region.

关键词： Rainbow Trout Oncorhynchus mykiss Genetically Characterized Growth Performance Water Quality

Using a Macroalgal Functional Form Approach to Assess the Level of Disturbance of Seagrass Meadows in Bahía of Nuevitas,Cuba(2000-2002)

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American Journal of Plant Sciences 2019年第11期10卷 2020-2033页

作者： Rubén Cabrera Jhoana Diaz-Larrea Schery Umanzor laura georgina Núnez garcia Gabinete de Arqueologia Oficina del Historiador de la CiudadHabana ViejaCuba Departamento de Hidrobiologia Universidad Autonoma Metropolitana-IztapalapaMexico CityMexico Department of Ecology&Evolutionary Biology University of ConnecticutStamfordCTUSA

A study on the spatial and seasonal variations of the associate macroalgae and epiphytes of Thalassia testudinum was carried out in Bahía de Nuevitas. Sixty-two species were identified: 3 Cyanophyta, 25 Chlorophyta, 8 Phaeophyceae, 23 Rhodophyta and 3 Magnoliophyta, with two new records for Cuba and 43 for the area. The differences in the specific composition of the macroalgae communities are determined by a space component related to the type of affectation in each area. The morpho-functional groups of macroalgae in the station with more nutrient influence were mainly foliaceous and filamentous. In the stations far from the city, the predominant morpho-types were the leathery and articulate calcareous indicators of lower nitrification levels. The abundance and diversity of macroalgae in the site affected by fisheries were lower due to the damage by bottom trawls. Seasonal variations were found in the relative abundance of the species, not in the diversity, which makes evident seasonal changes in the structure of the seaweeds, where some species replace others in the community.

关键词： Cuba Epiphytes Thalassia Morpho-Functional Groups Seaweeds

Sustainable Development of Ecotourism in Mexico

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Economics World 2014年第3期2卷 188-195页

作者： Velazquez-Sainchez Rosa Maria Gomez-Velazquez Jesus Gaytan Bohorquez laura Irene nunez Contreras Carlos Abdiel Benito Juarez Autonomous University of Oaxaca Oaxaca Mexico

Dimensions of sustainable development were analyzed based on the commonality, services, and ecotourism activities of 35 indigenous communities in Mexico. Based on indicators of local development in indigenous communities with ecotourism activities available and environmental indicators given by the Ministry of Tourism of Mexico SECTUR and of communitarian sustainability developed in Mexico. Data from a 118 items questionnaire from inhabitants participating in ecotourism projects of indigenous groups within 13 states of the Mexican Republic were tested. The results showed the definition of five categories of local development, two environmental categories, and four categories of communitarian sustainability in the Mexican states with the largest indigenous populations. A positive relationship between the community perspective and the indigenous ecotourism and the three dimensions of sustainable development was observed. This study provides an alternative methodology for the analysis of the sustainable development dimensions in projects of indigenous communities.

关键词：世界经济政策规划经济问题

高分辨熔解曲线分析技术用于甲基丙二酸血症相关基因突变分析

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高分辨熔解曲线分析技术用于甲基丙二酸血症相关基因突变分析

Current role of capsule endoscopy in Crohn's disease

中国的遗传学研究——遗传学进步推动中国西部经济与社会发展——2011年中国遗传学会大会

作者：黄秋英 Margaret Illson 周路明 laura Dempsey nunez David Rosenblatt Carl Wittwer 厦门大学生命科学学院生物医学科学系 Department of Pathology University of Utah Medical SchoolSalt Lake CityUT 84132USA Department of Medical Genetics McGill University Health CentreMontrealQuebecCA

甲基丙二酸血症(Methylmalonic aciduria,MMA)是一种常染色体隐性遗传病,可以由多个不同基因的突变引起。本文利用近年来迅速发展的高分辨熔解曲线分析技术,对可以引起甲基丙二酸血症的MMACHC基因和MUT基因进行突变分析。首先针对MMACH... 详细信息

甲基丙二酸血症(Methylmalonic aciduria,MMA)是一种常染色体隐性遗传病,可以由多个不同基因的突变引起。本文利用近年来迅速发展的高分辨熔解曲线分析技术,对可以引起甲基丙二酸血症的MMACHC基因和MUT基因进行突变分析。首先针对MMACHC基因和MUT基因的16个编码外显子及邻近内含子区域,设计20对PCR扩增引物(扩增长度145-359bp),且针对两个基因中常见的多态性为位点,设计5条Snapback引物进行基因分型,以区分常见的多态性位点与引起疾病的突变。通过随机筛查96份人类基因组DNA样本,建立了两个基因的高分辨熔解曲线分析体系。该体系随后用于197份经全基因组扩增(WGA)的病人标本的双盲检测,检测结果与测序结果进行比较。检测结果表明,该体系经PCR扩增之后,一次高分辨熔解曲线分析就可以筛查出所有的杂合突变及部分纯合突变标本,而剩余的纯合突变标本通过将未知样本的PCR产物与野生型PCR产物混合,再次高分辨熔解曲线分析也可以检测出。197份病人标本共检测到241种杂合突变和69种纯合突变,其中MMACHC基因检测到频率较高的三种突变,即c.271dupA、c.394C>T和c.331C>T,而MUT基因多为外显子上随机突变。该体系的检测灵敏度和特异性都>99%,少数检测有误的标本是由标本全基因组扩增时等位基因偏向扩增引起。因此,高分辨熔解曲线分析技术用于基因突变筛查具有快速、简便、高通量、高灵敏度、高特异性等优点。

关键词：高分辨熔解曲线分析甲基丙二酸血症突变分析

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World Journal of Gastrointestinal Endoscopy 2016年第17期8卷 572-583页

作者： Marisol Luján-Sanchis laura Sanchis-Artero laura Larrey-Ruiz laura Peno-Munoz Paola nunez-Martinez Génesis Castillo-López Lara González-González Carlos Boix Clemente Cecilia Albert Antequera Ana Durá-Ayet Javier Sempere-garcia-Argüelles Digestive Diseases Unit General University Hospital of Valencia 46014 Valencia Spain

Capsule endoscopy(CE) currently plays an important role in Crohn's disease(CD). It is a noninvasive technique that has led to a breakthrough in the endoscopic diagnosis of diseases of the small intestine. Its superior diagnostic performance and excellent safety profile lead to its considerable acceptance on the part of the patient. This paper reviews current indications of CE in three stages of clinical practice: Suspected CD, unclassified colitis and its extensive role in diagnosed CD. The diagnostic and therapeutic impact of the results of CE on the monitoring of this disease is also reviewed. Knowledge of its applications, the interpretation of its results in an appropriate context and the existence of a validated endoscopic activity index could change the way in which these patients are managed. The definition of mucosal healing and postoperative recurrence by means of endoscopic scoring systems will endow CE with new applications in the management of CD in the near future.

关键词： Capsule endoscopy Inflammatory bowel disease Crohn’s disease