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	Provedor de dados OMA (7) Autor Polk, Ph. (7) Nihoul, J.C.J. (3) Bergmans, M. (1) Hauspie, R. (1) Lambert, F. (1) Pissierssens, P. (1) Mais... Palavra-chave Analytical techniques (1) Belgium (1) Carbon compounds (1) Community composition Oyster culture Plankton ASW (1) Cuba (1) Greater Antilles (1) Oostende Harbour (1) Organic matter (1) Sluice Dock (1) Staining (1) Swimming Copepoda [copepods] ANE (1) Mais... Tipo do documento Info:eu-repo/semantics/article (6) Info:eu-repo/semantics/book (1) Ano 1985 (1) 1976 (4) 1973 (1) 1971 (1) País Belgium (7) Idioma Holandês (4) Inglês (2) Francês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 414 Primeira ... 13 14 15 16 17 18 19 20 21 ... Última Variability of the anthracnose fungus Colletotrichum graminicola in sorghum genotype mixtures Trop. Plant Pathol. Valério,Henrique M.; Casela,Carlos R.; Resende,Maria A.; Santos,Fredolino G.. This paper reports partial results obtained on the variability of Colletotrichum graminicola developed in response to the host diversity generated by three-line combination of sorghum (Sorghum bicolor) genotypes. Nine sorghum lines were used in this study: CMSXS210B, CMSXS112B, CMSXS215B, CMSXS221B, CMSXS169R, CMSXS180R, CMSXS182R, CMSXS227R, and CMSXS116R. A total of 39 treatments on mixtures and pure stands of the component lines were evaluated in the field for the development of anthracnose, as a natural epidemic. Samples of the single spore isolates of the pathogen of each treatment indicated a reduction in the phenotypic diversity and an increase in the frequency of more complex races in genotype mixtures in relation to the pure stands of each genotype. Tipo: Info:eu-repo/semantics/report Palavras-chave: Sorghum bicolor; Diseases; Virulence; Diversity. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582004000500019 Variação temporal da comunidade fitoplanctônica em lagos urbanos eutróficos - doi: 10.4025/actascibiolsci.v33i4.5955 Biological Sciences Nabout, João Carlos; UFG; Nogueira, Ina Souza; UFG. O objetivo desse trabalho foi averiguar a mudança sazonal e o sincronismo temporal de atributos da comunidade fitoplanctônica (diversidade e a densidade) de quatro reservatórios urbanos eutróficos (lago do Jardim Botânico, lago do parque Vaca Brava, lago das Rosas e lago do bosque dos Buritis) do município de Goiânia, Estado de Goiás. A diversidade foi estimada pelo índice de Shannon-Winner (H’) e a densidade foi pelo método de Utermöhl. Todos os quatro lagos apresentaram elevada diversidade fitoplanctônica, variando de H’ = 0,97 (bosque dos Buritis) a H’ = 4,29 (lago do Jardim Botânico), além disso, a diversidade foi significativamente distinta entre os quatro lagos estudados (F = 4,74; p < 0,001, n = 4). A densidade fitoplanctônica foi elevada, sendo... Palavras-chave: Ecologia; Botanica; Taxonomia de criptógamos Densidade; Diversidade; Sincronismo; Lagos artificiais; Fatores locais; Sazonalidade Density; Diversity; Synchronism; Artificial lakes; Local factors; Seasonality. Ano: 2011 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5955 Variaciones espaciales y temporales del fitoplancton en un lago subtropical de Argentina BJB ZALOCAR DE DOMITROVIC,YOLANDA; ASSELBORN,VIVIANA M.; CASCO,SYLVINA L.. Species composition, biomass and diversity of the phytoplankton in a subtropical lake (27°29'S; 58°45'W) were studied from February 1995 to March 1996. One or two samples were taken monthly in the limnetic and the littoral area. Cell counts were done by the Utermöhl method (1958). Phytoplankton biomass varied among 2.38 and 45.59 mm³.m-2 with a mean value of 12.11 (±10.52) mm³.m-2. The population density oscillated among 0.3x10(6) and 4.7x10(6) ind.cm-2. Cyanophyta was the dominant group all the year contributing among 25% and 83% of the total biomass. Cylindrospermopsis raciborskii, Aphanizomenon sp. and Microcystis aeruginosa were the dominant species. The Chlorophyta, second group in importance, contributed among 8% and 50% being Botryococcus braunii... Tipo: Info:eu-repo/semantics/article Palavras-chave: Subtropical lake; Phytoplankton; Composition; Biomass; Diversity. Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081998000300003 Variation in synonymous codon use and DNA polymorphism within the Drosophila genome ArchiMer Bierne, Nicolas; Eyre Walker, A. A strong negative correlation between the rate of amino-acid substitution and codon usage bias in Drosophila has been attributed to interference between positive selection at nonsynonymous sites and weak selection on codon usage. To further explore this possibility we have investigated polymorphism and divergence at three kinds of sites: synonymous, nonsynonymous and intronic in relation to codon bias in D. melanogaster and D. simulans. We confirmed that protein evolution is one of the main explicative parameters for interlocus codon bias variation (r(2) similar to 40%). However, intron or synonymous diversities, which could have been expected to be good indicators of local interference [here defined as the additional increase of drift due to selection on... Tipo: Text Palavras-chave: Substitution rate; Selective constraints; Linkage; Hill Robertson interference; GC content; Drosophila; Diversity; Codon usage. Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-4221.pdf Variation of the ichthyofauna along the Goioerê River: an important tributary of the Piquiri-Paraná basin Iheringia, Sér. Zool. Tos,Claudenice Dei; Gomes,Luiz C.; Rodrigues,Maria A.. The construction of reservoirs is considered an important source of impacts on the fish fauna, severely altering the structure of the assemblage. This paper aimed to describe the structure of the fish assemblage of the Goioerê River, determining its longitudinal distribution and patterns of species dominance. The evaluation of its longitudinal variation in the diversity and abundance of the fish assemblage was conducted in July and October 2004 and January and May 2005. The collections were carried out near the headwaters (Gurucaia), middle stretch (Olaria), just above the falls (Paiquerê) and downstream (Foz). Forty-four species were captured. The Gurucaia fish assemblages differed significantly from Olaria, Paiquerê and Foz. The Olaria assemblages... Tipo: Info:eu-repo/semantics/article Palavras-chave: Diversity; Fish community; Richness; Evenness; Goioerê River basin. Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212014000100014 Vegetación y etnobotánica de milpas y potreros en la región de Los Choles, en el municipio de Candelaria, Campeche. Colegio de Postgraduados Guillermo Gómez, María Asunción. Los potreros están cubriendo una proporción cada vez más grande del trópico húmedo de México, mientras el área de selvas y del cultivo de maíz ha ido en descenso. Pero, existe muy poca información sobre la composición florística y ecológica de estos pastizales inducidos. En este trabajo se compara la florística, fitogeografía, diversidad, etnobotánica y usos de la vegetación en milpas y potreros en el municipio de Candelaria, Campeche, entre la población de la etnia chol; además de que se describe el manejo de cada tipo de vegetación (milpa/potrero) con detalle. Se parte de la premisa que las milpas tendrán mayor diversidad, una proporción más grande de especies nativas y útiles, y que son recolectadas en cantidades mayores que los potreros, por ser el... Palavras-chave: Arvense; Diversidad; Cobertura; Frecuencia; Aprovechamientos; Weeds; Diversity; Coverage; Frequency; Uses; Botánica; Maestría. Ano: 2013 URL: http://hdl.handle.net/10521/2091 Vertical structure of an assemblage of bats (Mammalia: Chiroptera) in a fragment of Atlantic Forest in Southern Brazil Rev. Bras. Zool. Carvalho,Fernando; Fabián,Marta E.; Menegheti,João O.. Few studies have focused the vertical structure of bat assemblages, and how it influences community composition. The goal of this study was to analyze the vertical structure of an assemblage of bats in a forest fragment in southern Brazil. Bats were sampled using mist-nets placed at three heights (understory, below-canopy, and canopy). Forest strata were compared with respect to their species richness and diversity. The latter was estimated using the Shannon-Wiener index (H'), and the statistical significance of differences among strata was assessed using t tests. We used an index of Constancy (C) to determine the frequency of a given species in each vegetation stratum, such that a species was considered as "frequent" (C &gt; 50), "less frequent" (25... Tipo: Info:eu-repo/semantics/article Palavras-chave: Diversity; Phyllostomidae; Richness; Stratification; Vespertilionidae. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000500004 Visual censuses around drifting fish aggregating devices (FADs): a new approach for assessing the diversity of fish in open-ocean waters ArchiMer Gaertner, J; Taquet, Marc; Dagorn, L; Merigot, B; Aumeeruddy, R; Sancho, G; Itano, D. This study provides a baseline measure of pelagic fish species diversity around fish aggregating devices (FADs) in the Western Indian Ocean. Using data from visual censuses made by SCUBA divers around drifting FADs we (1) analysed 11 diversity indices describing 4 main components of pelagic diversity: number of species, evenness, taxonomic diversity and rarity and (2) discussed the viability of using visual censuses around FADs to monitor temporal and spatial changes in diversity patterns of pelagic fishes in the future. Our results not only show that a single index, such as species richness or the Shannon-Wiener index, cannot provide a complete description of pelagic fish diversity around FADs, but also that some components of diversity appear to be... Tipo: Text Palavras-chave: Indian Ocean; Drifting FADs; Diversity; Pelagic fishes. Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-4674.pdf Weed Diversity in Corn with Different Plant Arrangement Patterns Grown Alone and Intercropped with Palisade Grass Planta Daninha MELO,T.S.; MAKINO,P.A.; CECCON,G.. ABSTRACT: Composition and level of weed infestation interfere with crop yield and increase production costs. This study aimed to identify weed composition and infestation in corn grown with different plant populations, single, and intercropped with palisade grass. The phytosociological method was used to evaluate density, frequency, dominance, and infestation level of weeds in single and intercropped corn, a with conventional (0.90 m) and reduced (0.45 m) spacing, and low and high plant population in Dourados, MS, Brazil. Commelina benghalensis, Echinochloaspp., and Euphorbia heterophylla were the species most found in the treatments. Single corn with higher plant population decreased weed occurrence. Treatments with palisade grass under a reduced spacing... Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays; Urochloa; Plant population; Phytosociology; Diversity. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100199 What do we know about Neotropical trap-nesting bees? Synopsis about their nest biology and taxonomy Pap. Avulsos de Zool. (São Paulo) Costa,Camila Cristina Ferreira da; Gonçalves,Rodrigo Barbosa. Abstract Cavity-nesting bees are enigmatic because they are difficult to observe in the wild, hence trap-nests (man-made cavities) provide the means by which these bees may be studied. Trap-nests is an efficient methodology to study these bees and are common worldwide. These traps have been used for a variety of reasons, including inventories, to examine pollen load, to study habitat disturbance, and bee conservation. However Neotropical trap-nesting bees’ taxonomy and biology are still poorly known and here we provide a review about these subjects. We searched for trap-nest bee studies in the Neotropical Region using Google Scholar and ISI Web of Science at any time in the past to December 2017. We found 109 independent studies, most of which were from... Tipo: Info:eu-repo/semantics/article Palavras-chave: Bee hotels; Diversity; Methodology; Nesting behavior; Systematics. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492019000100226 Why we shouldn’t blame women for gender disparity in academia: perspectives of women in zoology Rev. Bras. Zool. Slobodian,Veronica; Soares,Karla D.A.; Falaschi,Rafaela L.; Prado,Laura R.; Camelier,Priscila; Guedes,Thaís B.; Leal,Laura C.; Hsiou,Annie S.; Del-Rio,Glaucia; Costa,Eliza R.; Pereira,Karla R.C.; D’Angiolella,Annelise B.; Sousa,Shirliane de A.; Diele-Viegas,Luisa M.. ABSTRACT The following letter, from a network of women zoologists, is a reply to the article of AlShebli et al. (2020), which suggests that female protégés reap more benefits when mentored by men and concludes that female mentors hinder the success of their female protégés and the quality of their impact. This contribution has two parts. First, we highlight the most relevant methodological flaws which, in our opinion, may have impacted the conclusions of AlShebli et al. (2020). Second, we discuss issues pertaining to women in science, bring a perspective of Women in Zoology and discuss how current diversity policies are positively changing our field. Tipo: Info:eu-repo/semantics/other Palavras-chave: Academic settings; Diversity; Gender gap; Gendered metrics; STEM; Women in science. Ano: 2021 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702021000100101 การตรวจสอบความหลากหลายของสายพันธุ์เชื้อราสาเหตุโรคไหม้ของข้าวในประเทศไทย Thai Agricultural Poonsak Mekwatanakarn; Payorm Cobelli; Acharaporn Na Lampang Noenplab; Thanomjit Rithmontree; Kulchana Ketsuwan; Chanasirin Klinmanee; Sanguan Teang Deerith. Rice blast disease is the major disease in rainfed lowland area of Thailand. The causal fungus of this disease is Pyricularia grisea Sacc. Variation of this fungus was higher than other rice pathogens. This report used near isogenic lines (NILs) to detect the variation, pathothype and virulence spectrum of the fungus in Thailand during 2002 - 2005. Trap blast nurseries consisted of 9 Thai local cultivars and 18 NILs were conducted at Ubon Ratchathani Rice Research Center, Khon Kaen Rice Research Center, Phrae Rice Research Center, Phitsanulok Rice Research Center, and Phatthalung Rice Research Center. Single conidia was isolated from infected rice leaves. Virulence spectrum of blast populations were screened on 18 NILs. Two thousand four hundred seventy... Tipo: Collection Palavras-chave: Rice; Blast disease; Pathotype; Near isogenic lines; Diversity; ข้าว; โรคไหม้; เชื้อสาเหตุ; สายพันธุ์เชื้อ; ยีนต้านทานเดี่ยว; ความหลากหลายของเชื้อ; เชื้อรา. Ano: 2007 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5300 ความหลากหลายของสัตว์ไม่มีกระดูกสันหลังในระบบนิเวศข้าวไร่ ที่อำภอบ้านแฮด จังหวัดขอนแก่น Thai Agricultural Patchai Souksai; Yupa Hanboonsong. The research studies an arthropod community in upland rice ecosystem at farmers’ field in Ban Had District, Khon Kaen Province, Northeast Thailand, was conducted during May to October 2011. Samples were collected using light traps, yellow sticky traps, sweep nets and visual observation methods. A total of 7,195 individual arthropods from 160 species were recorded in this study. Among the sampling methods, 140 species were recorded using light trap, followed by 108, 58 and 30 species collected by using yellow sticky trap, sweep net and visual observation, respectively. The arthropod community of this studies constituted of four guilds as phytophagous, predator, parasitoid and scavenger. The predator (60.93 % of total individuals and 47.17% of total species)... Tipo: PhysicalObject Palavras-chave: Arthropods; Upland rice ecosystem; Community structure; Diversity; Rice growth; Pest control program; Ban Had district; Khon Kaen province; Northeast; สัตว์ไม่มีกระดูกสันหลัง; ระบบนิเวศข้าวไร่; โครงสร้างประชากร; อนุกรมวิธาน; ความหลากหลาย; จ.ขอนแก่น. Ano: 2013 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5794 สิทธิเกษตรกร: ผลกระทบจากร่างแก้ไขกฎหมายคุ้มครองพันธุ์พืช Thai Agricultural Somchai Ratanachueskul. Agriculture has been one of the most important occupations in the Thai society from the past to the present. A considerable number of plant varieties in Thailand are partly derived from the farmers’ path of life and their customs—they exchange seeds and knowledge relating to such varieties. However, under unavoidable international trade and free market paradigm, agriculture businesses led by multinational corporations encourage and support modern agriculture by convincing farmers to cultivate for export using high yield varieties, and limiting farmers’ choice to grow crops. Under these circumstances, the principle factors of farmers’ cultivation, seeds and plant varieties among others, are transformed into private property and protected by an intellectual... Tipo: PhysicalObject Palavras-chave: Farmers'rights; Plant variety protection act; Plant conservation; Ownership; Seed; Diversity; Legal rights; สิทธิเกษตรกร; พ.ร.บ.คุ้มครองพันธุ์พืช; อนุรักษ์พันธุ์พืช; กรรมสิทธิ์ในเมล็ดพันธุ์; พันธุ์พืช; เมล็ดพันธุ์พืช; กฎหมายคุ้มครองพันธุ์พืช; ทรัพย์สินทางปัญญา; นักปรับปรุงพันธุ์พืช; การพัฒนาพันธุ์พืช; สิทธิทางกฎหมาย. Ano: 2014 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5734 Registros recuperados: 414 Primeira ... 13 14 15 16 17 18 19 20 21 ... Última

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