Detection of rubber tree orchards infested by Meloidogyne exigua using vegetation indexes obtained from satellite images     

Lemes  Ernane M.  Machado  Túlio V.  Gontijo  Luciana N.  de Andrade  Samuel L.  Torres  José L. R.  Santos  Maria A.  Coelho  Lísias 《New Forests》2020,51(5):765-779

New Forests - Hevea brasiliensis natural rubber production is strategic for the world economy. Meloidogyne exigua causes the main root disease in this crop in Brazil. Its early diagnosis allows...  相似文献   

Patterns of insecticide resistance in Aedes aegypti: meta‐analyses of surveys in Latin America and the Caribbean     

Raul Narciso C Guedes  Kaley Beins  Dennis Navarro Costa  Giovanini E Coelho  Haroldo Srgio da S Bezerra 《Pest management science》2020,76(6):2144-2157

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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   

Crude glycerol in diets for Nile tilapia sex reversal (Oreochromis niloticus,Linnaeus 1758)          下载免费PDF全文

Fábio Meurer  Aldo Tovo Neto  Lilian Carolina Rosa da Silva  Luana Cagol  Marise Taise Theisen  Lilian Dena dos Santos 《Aquaculture Research》2016,47(8):2682-2685

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Use of encounter data to model spatio‐temporal distribution patterns of endangered smalltooth sawfish,Pristis pectinata,in the western Atlantic          下载免费PDF全文

John D. Waters  Rui Coelho  Joana Fernandez‐Carvalho  Amy A. Timmers  Tonya Wiley  Jason C. Seitz  Matthew T. Mcdavitt  George H. Burgess  Gregg R. Poulakis 《水产资源保护:海洋与淡水生态系统》2014,24(6):760-776

Plant extracts as phytogenic additives considering intake,digestibility, and feeding behavior of sheep     

Camila Sousa da Silva  Evaristo Jorge Oliveira de Souza  Gerfesson Felipe Cavalcanti Pereira  Edwilka Oliveira Cavalcante  Ewerton Ivo Martins de Lima  Thaysa Rodrigues Torres  José Ricardo Coelho da Silva  Daniel Cézar da Silva 《Tropical animal health and production》2017,49(2):353-359

The objective was to evaluate the intake, digestibility, and ingestive sheep behavior with feeding phytogenic additives derived from plant extracts. Five non-emasculated sheep without defined breed at 28?±?1.81 kg initial body weight and 6 months age were used. Treatments consisted of administering four phytogenic additives from the garlic extracts, coriander seed, oregano, and pods of mesquite, plus a control treatment (without additive). The ration was composed of Tifton 85 hay grass, corn, soybean meal, and mineral salt. As experimental design, we used a 5?×?5 Latin square design (five treatments and five periods). The data were analyzed through the mixed model through the procedure PROC MIXED of software Systems Statistical Analysis version 9.1, with comparation analysis between the treatment without additive (control) with phytogenic additives produced from vegetable extracts of mesquite pod, of coriander seed, the bulb of garlic, and the oregano leaves. There were no significant differences for the nutrient intake and ingestive behavior patterns. However, the additive intake derived from mesquite pods and coriander extracts provided an increase in digestibility. Extracts from garlic, coriander, and mesquite pods can be used as phytogenic additives in feeding sheep.  相似文献   

Spineless cactus associated with Tifton hay or sugarcane bagasse may replace corn silage in sheep diets     

Julimar do Sacramento Ribeiro  Luana Lira Santos  Dorgival Morais de Lima Júnior  Tobyas Maia de Albuquerque Mariz  Márcio Machado Ladeira  Paulo Sérgio de Azevedo  Carolyny Batista Lima  Maria Josilaine Matos dos Santos Silva 《Tropical animal health and production》2017,49(5):995-1000

The effect of the replacement of corn silage with spineless cactus associated with Tifton 85 hay or sugarcane bagasse was evaluated on the performance, body weight components and sheep meat quality. Twenty-one Santa Inês male sheep with initial body weight of 22.9 ± 2.9 kg were used. They were confined in individual stalls for 74 days receiving the following diets: corn silage + concentrate (CS); spineless cactus + Tifton 85 hay + concentrate (TH); spineless cactus + sugarcane bagasse + concentrate (SB). After the feedlot period, the animals were slaughtered and their body components were weighed and sampled. Data were submitted to Tukey’s test at 5% probability. The average daily gain (0.25 vs 0.14 kg), cold carcass weight (13.3 vs 13.7 kg), loin muscularity (0.6 vs 0.4 kg) and liver weight (0.7 vs. 0.5 kg) were higher (P < 0.05) for the TH diet when compared to that for the CS. The physical-chemical parameters of meat were not influenced (P > 0.05) by the treatments and presented about 20.1% of crude protein, 6.1% of crude fat and shear force of 2.0 kgf/cm². In complete diets for sheep, Tifton 85 hay associated with spineless cactus provides greater weight gain, cold carcass muscularity and organ weight when compared to those for animals fed with corn silage as exclusive roughage. Sugarcane bagasse associated with spineless cactus may replace corn silage in complete diets for sheep.  相似文献   

Proteomic analyses of Ehrlichia ruminantium highlight differential expression of MAP1-family proteins     

Marcelino I  de Almeida AM  Brito C  Meyer DF  Barreto M  Sheikboudou C  Franco CF  Martinez D  Lefrançois T  Vachiéry N  Carrondo MJ  Coelho AV  Alves PM 《Veterinary microbiology》2012,156(3-4):305-314

The Rickettsiales Ehrlichia ruminantium (ER) is the causative agent of heartwater, a fatal tick-borne disease of livestock in sub-Saharan Africa and in the Caribbean, posing strong economical constraints to livestock production. In an attempt to identify the most prominent proteins expressed by this bacterium, especially those encoded by the major antigenic protein 1 (map1) multigene family, a proteome map of ER cultivated in endothelial cells was constructed by using two dimensional gel electrophoresis combined with mass spectrometry. Among the sixty-four spots detected, we could identify only four proteins from the MAP1-family; the other proteins detected were mainly related to energy, amino acid and general metabolism (26%), to protein turnover, chaperones and survival (21%) and to information processes (14%) or classified as hypothetical proteins (23%). Additional studies on MAP1-family protein using immunochemical labeling also revealed that these proteins are differentially expressed along the bacterium life cycle, presenting different structural organization. Interestingly, when infectious elementary bodies (EBs) are released from host cells, MAP1 appears to be organized in SDS and heat-resistant dimers and trimers stabilized by disulfide bridges. Overall, the results presented herein not only reveal the first partial proteome map of ER but provide new insights on the expression ER MAP1-family proteins in host endothelial cells.  相似文献   

Resistance to classical scrapie in experimentally challenged goats carrying mutation K222 of the prion protein gene     

Acutis PL  Martucci F  D'Angelo A  Peletto S  Colussi S  Maurella C  Porcario C  Iulini B  Mazza M  Dell'atti L  Zuccon F  Corona C  Martinelli N  Casalone C  Caramelli M  Lombardi G 《Veterinary research》2012,43(1):8

ABSTRACT: Susceptibility of sheep to scrapie, a transmissible spongiform encephalopathy of small ruminants, is strongly influenced by polymorphisms of the prion protein gene (PRNP). Breeding programs have been implemented to increase scrapie resistance in sheep populations; though desirable, a similar approach has not yet been applied in goats. European studies have now suggested that several polymorphisms can modulate scrapie susceptibility in goats: in particular, PRNP variant K222 has been associated with resistance in case-control studies in Italy, France and Greece. In this study we investigated the resistance conferred by this variant using a natural Italian goat scrapie isolate to intracerebrally challenge five goats carrying genotype Q/Q 222 (wild type) and five goats carrying genotype Q/K 222. By the end of the study, all five Q/Q 222 goats had died of scrapie after a mean incubation period of 19 months; one of the five Q/K 222 goats died after 24 months, while the other four were alive and apparently healthy up to the end of the study at 4.5 years post-challenge. All five of these animals were found to be scrapie negative. Statistical analysis showed that the probability of survival of the Q/K 222 goats versus the Q/Q 222 goats was significantly higher (p = 0.002). Our study shows that PRNP gene mutation K222 is strongly associated with resistance to classical scrapie also in experimental conditions, making it a potentially positive target for selection in the frame of breeding programs for resistance to classical scrapie in goats.  相似文献   

Does orchiectomy enhance the immune-stimulatory effects of melatonin during experimental Chagas’ disease?     

Santello FH  Caetano LC  Filipin Mdel V  Brazão V  Caetano LN  Toldo MP  do Prado JC 《Research in veterinary science》2012,93(2):819-825

Melatonin has been reported to play a fundamental role in T-cell immunoregulation. Control of Trypanosoma cruzi parasitism during the acute phase of infection is considered to be critically dependent on direct macrophage activation by cytokines. The aim of this work was to evaluate the influence of exogenous melatonin treatment and the influences exerted by sexual hormones during the acute phase of the experimental Chagas' disease in rats. With melatonin treatment, orchiectomized animals (CMOR and IMOR) displayed the highest concentrations of IFN-γ and TNF-α. On the 7th day post-infection, untreated and treated orchiectomized animals (IOR and IMOR) showed an enhanced number of peritoneal macrophages. Nitric oxide levels were also increased in untreated and treated orchiectomized (IOR and IMOR) when compared to the other groups, with or without LPS. Our data suggest that melatonin therapy associated with orchiectomy induced a stimulating effect on the immune response to the parasite.  相似文献