Essential oil of Lippia alba in the diet of Macrobrachium rosenbergii: Effects on antioxidant enzymes and growth parameters     

Luana Cagol  Bernardo Baldisserotto  Alexssandro Geferson Becker  Carine de Freitas Souza  Berta Maria Heinzmann  Braulio Otomar Caron  Francisco Assis Leone  Lilian Dena dos Santos  Eduardo Luis Cupertino Ballester 《Aquaculture Research》2020,51(6):2243-2251

The juveniles of Macrobrachium rosenbergii (0.060 ± 0.004 g and 2.018 ± 0.071 cm) were fed during 60 days with diets containing different doses of Lippia alba essential oil (EOLA) (0.0—control, 1.0, or 2.0 ml EOLA/kg diet; in triplicate, with 20 prawns/replicate). After the experimental period, were verified the survival, growth parameters and the antioxidant enzymes, lipid peroxidation and Na/K‐ATPase activities in hepatopancreas and gills, respectively, of the animals. There were no significant differences on survival, growth parameters and gill Na/K‐ATPase activity. However, glutathione peroxidase and glutathione‐S‐transferase activities were lower in hepatopancreas of prawns fed with 1.0 ml EOLA/kg diet compared to the control. Moreover, the activity of the enzyme superoxide dismutase was higher in hepatopancreas of prawns that received 2.0 ml EOLA/kg diet compared to those fed with 1.0 ml EOLA/kg diet. Although the addition of both EOLA doses has not improved the survival and growth parameters of M. rosenbergii, these doses contributed to decrease lipid peroxidation. Additionally, the dose of 2.0 ml EOLA/kg diet contributed for increasing the antioxidant enzymes activities in the hepatopancreas, improving antioxidant status, and therefore, it can be recommended as diet supplementation for M. rosenbergii.  相似文献   

Effect of feeding frequency on growth performance,blood metabolites,proximate composition and digestive enzymes of Lebranche mullet (Mugil liza) Juveniles     

Ewerton Calixto da Silva  Fabio Carneiro Sterzelecki  Luciana Alves Musialak  Juliet Kiyoko Sugai  Jorgelia de Jesus Pinto Castro  Fabiola Santiago Pedrotti  Caio Magnotti  Filipe dos Santos Cipriano  Vinicius Ronzani Cerqueira 《Aquaculture Research》2020,51(3):1162-1169

This study verified the effects of feeding frequency on growth, blood metabolites, digestive enzyme activities (alkaline protease, acid protease, amylase and lipase) and proximate composition of Lebranche mullet juveniles. Fish with initial weight of 13.6 ± 0.7 g were distributed in twelve tanks and fed one, three, five and seven times per day to apparent satiation for 60 days. While the final weight of fish fed only once a day attained just 15.4 ± 0.7 g, those fed five or seven times per day reached 54.0 ± 12.1 and 55.9 ± 6.1 g respectively. The feed consumption also increased at high frequencies, but feed efficiency was higher (76.7 ± 11.7%) when mullets were fed three times per day. In general, increasing feeding frequencies also increased blood content of metabolites (total protein, glucose, triglycerides and cholesterol), possibly due to increased intake and absorption of nutrients. The response of digestive enzymes correlated with feeding efficiency, with higher activity in fish fed three or five times per day. Concerning whole‐body proximate composition, no significant difference was observed in protein, but lipid content increased significantly with feed frequency. Based on growth performance and biochemical responses, we recommend feeding Lebranche mullet juveniles three to five times per day.  相似文献   

Restoring tropical forest composition is more difficult,but recovering tree-cover is faster,when neighbouring forests are young     

Toledo  R. M.  Perring  M. P.  Verheyen  K.  Martini  A. M. Z.  Ferreira  M. P.  Santos  R. F. 《Landscape Ecology》2020,35(6):1403-1416

Landscape Ecology - Neighbouring forests constitute biological sources that enable the succession from species-poor systems, such as tree-plantings, to highly diverse forests. However, old forest...  相似文献   

Biophysical parameters of coffee crop estimated by UAV RGB images     

dos Santos  Luana Mendes  Ferraz  Gabriel Araújo e Silva  Barbosa  Brenon Diennevan de Souza  Diotto  Adriano Valentim  Maciel  Diogo Tubertini  Xavier  Letícia Aparecida Gonçalves 《Precision Agriculture》2020,21(6):1227-1241

Precision Agriculture - The advance of digital agriculture combined with computational tools and Unmanned Aerial Vehicles (UAVs) has enabled the collection of data for reliably extracting...  相似文献   

Arbuscular mycorrhizal fungi communities improve the phytochemical quality of strawberry     

José Luís Trevizan Chiomento  Rosiani Castoldi da Costa  Fabiola Stockmans de Nardi  Nicolas dos Santos Trentin  Alexandre Augusto Nienow  Eunice Oliveira Calvete 《The Journal of Horticultural Science and Biotechnology》2019,94(5):653-663

The application of arbuscular mycorrhizal fungi (AMF) in strawberry cultivation can improve its growth and development. The objective of this study was to evaluate if strawberry plants in the absence and presence of inoculation with AMF communities, obtained from soils collected in reference-sites in the cultivation of this species, differ in their morpho-horticultural performance. Two experiments were carried out: in experiment I (frequency of AMF communities species) the treatments were eight soils containing AMF communities, collected from natural and agricultural ecosystems in reference-sites of strawberry cultivation in southern Brazil, with nine samples per treatment; in experiment II (use of AMF communities in strawberry) the treatments were eight AMF communities and one control (non-mycorrhizal plants), arranged in a completely randomised design, with three replicates. The species Claroideoglomus aff. luteum, C. claroideum, C. etunicatum, Funneliformis mosseae and Glomus sp2 were the most frequent in the studied sites and the morpho-horticultural performance of strawberry plants was improved when plants inoculated with AMF communities. Strawberry plants inoculated with mycorrhizae develop a more profuse root system and fruit anthocyanin content is increased.  相似文献   

Lippia gracilis essential oil in β‐cyclodextrin inclusion complexes: an environmentally safe formulation to control Aedes aegypti larvae     

Juliana G Galvo  Patrícia Cerpe  Darlisson A Santos  Joyce KMC Gonsalves  Adriana J Santos  Rafaela KV Nunes  Ana AM Lira  Pricles B Alves  Roseli La Corte  Arie F Blank  Gabriel F Silva  Scrates CH Cavalcanti  Rogria S Nunes 《Pest management science》2019,75(2):452-459

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Application of Tamarind Waste Extracts to Improve the Antioxidant Properties of Tamarind Nectars     

Souza  Danilo Santos  Souza  Jane Delane Reis Pimentel  Coutinho  Janclei Pereira  da Silveira  Tayse Ferreira Ferreira  Ballus  Cristiano Augusto  Filho  José Teixeira  Bolini  Helena Maria Andre  Godoy  Helena Teixeira 《Plant foods for human nutrition (Dordrecht, Netherlands)》2020,75(1):70-75

Plant Foods for Human Nutrition - Tamarind fruits are consumed worldwide and their seeds have an underexploited potential. We assessed the effect of the addition of a freeze-dried aqueous of...  相似文献   

Colletotrichum species causing grape ripe rot disease in Vitis labrusca and V. vinifera varieties in the highlands of southern Brazil     

Sergio Echeverrigaray  Fernando J. Scariot  Gabrielli Fontanella  Francesco Favaron  Luca Sella  Murilo C. Santos  Joséli Schwambach  Carine Pedrotti  Ana Paula L. Delamare 《Plant pathology》2020,69(8):1504-1512

Ripe rot is one of the most important bunch diseases of grapes in the highlands of southern Brazil and a matter of concern for winegrowers. Sixty-one strains isolated from berries of Vitis labrusca and V. vinifera varieties with symptoms were classified by phylogenetic analysis of the sequences of β-tubulin, glyceraldehyde-3-phosphate dehydrogenase, D1/D2 domain of 28S rDNA, and rDNA internal transcribed spacer. They were also characterized by morphology, and their pathogenicity was evaluated. The combined molecular data allowed identification of six Colletotrichum species: C. fructicola, C. kahawae and C. viniferum (gloeosporioides complex), C. limitticola, C. nymphaeae (acutatum complex), and C. karstii (boninense complex). This is the first report of C. karstii and C. limitticola associated with the ripe rot of grapes. Morphological characteristics varied within and among species, confirming their separation at the complex level. Pathogenicity tests on V. vinifera berries showed that the most prevalent species, C. viniferum (37.8%) and C. fructicola (36.1%), were more virulent than the less prevalent species C. limitticola and C. karstii. Our findings indicate that there is a high diversity of Colletotrichum species associated with ripe rot disease of grapes in Brazil. There were no clear differences in the distribution of Colletotrichum species between V. labrusca and V. vinifera varieties. The determination of fungal species responsible for grape ripe rot in Brazilian vineyards may contribute to further epidemiological studies and the development of more efficient prophylactic methods for ripe rot management.  相似文献   

Analysis of Colletotrichum musae populations from Brazil reveals the presence of isolates with high competitive ability and reduced sensitivity to postharvest fungicides     

Iris C. H. L. Leite  Renata A. Silva  José E. C. C. Santos  Rejane L. Freitas-Lopes  Marcos P. S. Câmara  Sami J. Michereff  Ueder P. Lopes 《Plant pathology》2020,69(8):1529-1539

In this study, the sensitivity of 218 isolates of Colletotrichum musae to imazalil and thiabendazole was evaluated, as well the fitness and competitive ability of less sensitive isolates. There was a positive correlation between the sensitivity to the two fungicides, but the isolates were more sensitive to imazalil. The estimated effective concentration of the fungicide able to inhibit mycelial growth by 50% (EC₅₀) was used to select four isolates with the lowest and the highest values for both fungicides, which were considered as sensitive (S) and less sensitive (LS), respectively. The level of sensitivity was maintained after 10 successive transfers on fungicide-free medium. Both fungicides were effective in controlling the disease caused by S isolates of C. musae in detached banana fruit when recommended doses were used. However, only imazalil was able to control the disease caused by LS isolates. For both fungicides, analysis of fitness-related variables (mycelial growth, sporulation, germination, and virulence) showed no difference between the groups of S and LS isolates, but a large variation was observed within the group. The LS isolates to thiabendazole that showed a mutation (F200Y) in the β-tubulin gene did not have fitness penalties. Our results allow a better understanding of the sensitivity and fitness of isolates of C. musae from Brazil, and demonstrate the importance of periodic monitoring to determine the frequency of LS isolates in populations, aiming at more effective management of anthracnose in banana orchards in Brazil.  相似文献   

Small rivers,great importance: Refuge and growth sites of juvenile migratory fishes in the upper São Francisco Basin,Brazil     

Marina Ferreira Moreira  Alexandre Peressin  Paulo Santos Pompeu 《Fisheries Management and Ecology》2023,30(1):1-10

Studies of migratory fish species in Neotropical Basins have generally focused on adult fishes, especially on their reproductive migration, whereas sites of growth and refuge of juveniles remain poorly investigated. We aimed to evaluate if smaller rivers play a role in the life cycle of these species. We used 13 rivers of different sizes in the upper São Francisco Basin, Brazil. We found that smaller rivers, especially when draining regions close to floodplains, were the first places where juveniles moved after leaving floodplain lakes. We also found that individuals moved downstream as they grew, and were found in increasingly larger rivers that were more distant from floodplains. Currently, the best-known strategy for conservation of neotropical migratory fishes is the maintenance of free-flowing stretches encompassing necessary habitats for life cycle completion. We conclude that small tributaries near floodplain regions are also needed in these protected free-flowing river systems.  相似文献