Evaluation of Scymnus nubilus (Coleoptera: Coccinellidae) as a biological control agent against Aphis spiraecola and Cinara juniperi (Hemiptera: Aphididae)     

Roberto Meseguer Rosagro  Isabel Borges  Virgilio Vieira  Gemma Pons Sol  Antnio O Soares 《Pest management science》2020,76(2):818-826

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Bee communities in forestry production landscapes: interactive effects of local-level management and landscape context     

Miljanic  Andriana S.  Loy  Xingwen  Gruenewald  David L.  Dobbs  Emily K.  Gottlieb  Isabel G. W.  Fletcher  Robert J.  Brosi  Berry J. 《Landscape Ecology》2019,34(5):1015-1032

Landscape Ecology - Land-use change is a key driver of pollinator declines worldwide. Plantation forests are a major land use worldwide and are likely to expand substantially in the near term,...  相似文献   

Characterization of digestive enzymes protease and alpha‐amylase activities in the thick‐lipped grey mullet (Chelon labrosus,Risso 1827)          下载免费PDF全文

Isabel Maria Pujante  Manuel Díaz‐López  Juan Miguel Mancera  Francisco Javier Moyano 《Aquaculture Research》2017,48(2):367-376

Activities of pepsin, trypsin, chymotrypsin, alpha‐amylase and lipase, as well as their optima and stability to pH and temperature, were determined in digestive extracts of thick‐lipped grey mullet, Chelon labrosus, of three different sizes: Group 1 (45.2 ± 3.0 g), Group 2 (180.9 ± 4.2 g), and Group 3 (328.5 ± 43.3 g). SDS‐PAGE zymograms were also used to assess the role of serine proteases in the digestive tract of C. labrosus. On the other hand, possible changes in the digestive enzyme profile of C. labrosus during development were observed, with a comparatively lower pepsin activity, higher activities of alkaline proteases and alpha‐amylase and no lipase activity recorded in pre‐adult specimens. It is suggested that these variations are linked to the changes in diet composition with age, moving from a partly carnivorous to a more herbivorous feeding habit.  相似文献   

Seaweed Blends as a Valuable Source of Polyunsaturated and Healthy Fats for Nutritional and Food Applications     

Francisca Marques  Diana Lopes  Elisabete da Costa  Tiago Conde  Andreia Rego  Ana Isabel Ribeiro  Maria Helena Abreu  Maria Rosrio Domingues 《Marine drugs》2021,19(12)

Seaweeds are considered healthy and sustainable food. Although their consumption is modest in Western countries, the demand for seaweed in food markets is increasing in Europe. Each seaweed species has unique nutritional and functional features. The preparation of blends, obtained by mixing several seaweeds species, allows the obtaining of maximum benefits and ingredients with single characteristics. In this work, five seaweed blends, commercially available and produced under organic conditions in Europe, were characterized. The proximal composition included contents of ash (20.28–28.68% DW), proteins (17.79–26.61% DW), lipids (0.55–1.50% DW), and total carbohydrates (39.47–47.37% DW). Fatty acid profiles were determined by gas chromatography–mass spectrometry (GC–MS), allowing quantification of healthy fatty acids, namely n-3 and n-6 polyunsaturated fatty acids (PUFA), and calculation of lipid quality indices. Each blend showed a characteristic PUFA content in the lipid pool (35.77–49.43% of total fatty acids) and the content in essential and healthy n-3 PUFA is highlighted. The atherogenicity (0.54–0.72) and thrombogenicity (0.23–0.45) indices evidenced a good nutritional value of lipid fractions. As nutritional and environmentally attractive products, the consumption of the studied seaweed blends can contribute to a healthy lifestyle.  相似文献   

Quantification of the invasiveness risk of non-native macroalgae in the Azores to support conservation measures     

Daniela Gabriel  Beatriz Martins  Cláudia Ribeiro  Lorenzo Vilizzi  Ana Isabel Ferreira  Suzanne Fredericq  Helena Calado 《水产资源保护:海洋与淡水生态系统》2024,34(1):e4082

Improvement of compactness and floral quality in azalea by means of application of plant growth regulators     

Mónica Meijón  Roberto Rodríguez  M Jesús Cañal  Isabel Feito 《Scientia Horticulturae》2009

The ornamental industry's difficulties in producing compact and well branched plants have been the subject of extensive evaluation, the problems being compounded by the fact that each species, and even each cultivar, requires a specific protocol. In this work, growth regulators (daminozide, paclobutrazol and chlormequat chloride) and chemical pinching agents (fatty acids) were applied to reduce shoot extension with a view to lowering production costs whilst optimizing plant quality in the production of azalea japonica. Assessment of the effectiveness of the different treatments was achieved using image analysis as a quantitative method which we consider to be a faster and more objective technique than classic biometry. The results indicate that daminozide and paclobutrazol treatment are the best options to control vegetative development and to promote the flowering of azalea japonica in a cold and humid zone such as Asturias. However, daminozide treatment induces floral deformation in one of the tested cultivars, Blaauw's Pink.  相似文献   

Modelling relative abundance of Oligoryzomys flavescens,an Orthohantavirus reservoir,in an endemic hantavirus pulmonary syndrome zone     

María Victoria Vadell  Carlos González Fischer  Mariano Codesido  Aníbal Carbajo  David Bilenca  Isabel E. Gómez Villafañe 《Zoonoses and public health》2023,70(1):13-21

Hantavirus pulmonary syndrome (HPS) is a zoonotic emerging infectious disease caused by New World orthohantaviruses (family Hantaviridae) hosted by rodents of the family Cricetidae. In Argentina, one of its main hosts is the sigmodontine rodent Oligoryzomys flavescens, a widely distributed mouse of the Pampas, Delta and Espinal ecoregions of central-east Argentina. Because the abundance of the reservoir and its proportion in the rodent community affects both virus prevalence and human exposure risk, its estimation throughout its known geographical distribution is of key importance for the design of public health strategies to prevent HPS. The aim of this study was therefore to model the relative abundance of O. flavescens in most of the Pampas ecoregion within Buenos Aires Province, Argentina, where hantavirus pulmonary syndrome is endemic. To do this we used owl-pellet samples collected between 2006 and 2008 from 51 sites distributed throughout most of Buenos Aires province. Mammalian prey in each pellet was identified to the lowest possible taxonomic level by examination of the skulls, dentaries and molars. We modelled the frequency of O. flavescens found in each sample as a function of climatic, environmental, and topographic data of each site. The two best models were applied to a Geo referential Information System to build maps of estimated frequency (as a proxy of relative abundance) within Buenos Aires province. Estimated relative abundance of O. flavescens in Buenos Aires province was significantly associated with annual mean temperature, annual precipitation and presence of freshwater bodies, and varied among sub-regions, with the Inland and Rolling Pampas being the regions with highest frequencies. Knowing in which areas O. flavescens abundance is expected to be higher can be used to concentrate limited sanitary efforts in those areas that are most needed in order to reduce transmission and increase detection.  相似文献   

Proteolytic Enzymes in Germinating Rye Grains     

Kristof Brijs  Isabel Trogh  Berne L. Jones  Jan A. Delcour 《Cereal Chemistry》2002,79(3):423-428

The proteolytic activities during rye (Secale cereale L. ‘Humbolt’) grain germination were monitored using in‐solution methods and one‐ and two‐dimensional PAGE with gels that contained incorporated substrate proteins. The total proteolytic activity increased during the first three days of germination, but not after that. The proteinase activity was measured at pH 3.8, 6.0, and 8.0 in the presence and absence of class‐specific proteinase inhibitors. This indicated that enzymes from all four proteinase classes were present during the germination process. Germinated rye grain contained mainly aspartic and cysteine proteinase activities that are especially active at pH 3.8. Serine‐ and metallo‐proteinases were less abundant. Overall, the pattern of hydrolysis was very similar to that observed during barley and wheat germination.  相似文献