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1.
The results of vaccinating two groups of puppies with commercial vaccines, both of which claimed to provide adequate protection with a final vaccination at 10 weeks of age, were compared. Groups of 19 and 20 puppies with similar titres of maternally derived antibodies against canine parvovirus (cpv), canine distemper virus (cdv) and canine adenovirus type 2 (cav-2) at four weeks of age were vaccinated at six and 10 weeks of age and their responses to each vaccination were measured by comparing the titres against cpv, cdv and cav-2 in the serum samples taken immediately before the vaccination and four weeks later. After the vaccination at six weeks of age, all 19 of the puppies in group 1 had responded to cpv and cdv, and 14 had responded to cav-2; in group 2, 17 of the 20 had responded to cpv, 19 to cdv and 15 to cav-2. In both groups the puppies that did not respond to the first vaccination had responded serologically to cpv, cdv and cav-2 at 10 weeks of age. 相似文献
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da Silva Kleitiane Balduino de Oliveira Juliana Silva Santos Edson Mauro Cartaxo Felipe Queiroga Guerra Ricardo Romão do Nascimento de Souza Aelson Fernandes Muniz Ana Cecília Souza de Lima Cruz Gabriel Ferreira 《Tropical animal health and production》2020,52(2):637-645
Tropical Animal Health and Production - This study examined rumen fermentation, histological, blood, and urinary characteristics as well as ammoniacal nitrogen concentration, pH, nitrogen balance,... 相似文献
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Light-enhanced free radical formation and trypanocidal action of gentian violet (crystal violet) 总被引:2,自引:0,他引:2
R Docampo S N Moreno R P Muniz F S Cruz R P Mason 《Science (New York, N.Y.)》1983,220(4603):1292-1295
Transmission of Chagas' disease by transfusion of blood containing Trypanosoma cruzi has often been reported, and gentian violet, a triarylmethane dye, is widely used by blood banks in attempts to eliminate such transmission. In a study of intact trypanosomes, gentian violet was found to undergo a one-electron reduction to produce a carbon-centered free radical as demonstrated by electron spin resonance spectroscopy. Either reduced nicotinamide adenine dinucleotide or the reduced dinucleotide phosphate could serve as a source of reducing equivalents for the production of this free radical by homogenates of Trypanosoma cruzi. The formation of this free radical, and the trypanocidal action of gentian violet, were enhanced by light. The enhanced free radical formation may be the basic cause of the selective toxicity of gentian violet to Trypanosoma cruzi. 相似文献
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Boris Marioni José António L. Barão-Nóbrega Robinson Botero-Arias Fábio Muniz Zilca Campos Ronis Da Silveira William E. Magnusson Francisco Villamarín 《水产资源保护:海洋与淡水生态系统》2021,31(12):1056-1067
- Crocodilians represent one of the oldest extant vertebrate lineages. They have co-existed with humans throughout the Amazon basin for thousands of years, often having a strong cultural and economic influence on people's lives. Shifts in the socio-economic and political reality of the Amazon basin during the last century have led crocodilian populations to face large variations in their numbers according to different levels of exploitation and strategies for their conservation.
- This article reviews the scientific knowledge obtained between 1945 and 2019 on the biology, conservation and management for the four Amazonian crocodilian (caiman) species (Caiman crocodilus, Melanosuchus niger, Paleosuchus palpebrosus and Paleosuchus trigonatus). It provides a general overview on past and current population status and research efforts involving caimans in the Amazon basin and discusses perspectives for the future.
- The most significant studies on the ecology, genetics and management strategies are examined in more detail and this information is contextualized to provide an overview of the most relevant findings that might explain caiman population trends over the last 75 years.
- Systems for sustainable management in the Amazon basin have been discussed for the past 20 years, but remain rarely applicable. It is necessary to develop new ways to maintain healthy caiman populations through innovative management programmes. Sustainable harvesting of wildlife has been shown to promote conservation targets, especially those initiatives based on community co-management. In this article, we propose some general guidelines for future management schemes, in the expectation that the information provided by the scientific community will be considered fully without political agendas determining the priorities.
5.
Carolina M. Muniz Natália C. L. dos Santos Matheus T. Baumgartner Angelo A. Agostinho Luiz C. Gomes 《Ecology of Freshwater Fish》2020,29(2):241-251
One of the main impacts on aquatic environments is the alteration of flow regime, usually caused by dam construction. This impact changes the dynamics and functioning of the environment. We aimed to evaluate changes in the composition of functional traits of fish assemblages from 29 reservoirs of different chronological ages. We assessed if there were any alterations in trophic state of these reservoirs according to their ages (chronological variable). Then, we evaluated the relationship between functional traits and environmental/chronological variables. Results showed that reservoir age is a predictor of fish assemblage functional traits composition. In older reservoirs, there was a predominance of omnivorous species, with multiple spawning and parental care. However, herbivorous species, with total spawning and medium size, had their abundance reduced. Also, it was possible to identify the influence of depth and water retention time on the composition of functional traits. By showing that although age has an influence on composition, the intrinsic characteristics of each reservoir are very important in evaluating the impacts of these projects. Therefore, the findings presented provide insights into what may happen to functional traits of fish assemblages with ageing of reservoirs. 相似文献
6.
Fish status in terms of ‘good, ‘sparse’, ‘lost’, ‘never had fish’, has previously been reported for several thousands of lakes in southermost Norway. In more than a thousand of these lakes pH and conductivity have also been measured. These data have been used to establish a relationship between pH and fish status (brown trout). It is estimated that a uniform pH increase of 0.2 units will result in status changes from category ‘lost’ to ‘sparse’ in 12% of the lakes (27% of the lakes which have lost the fish population). Altogether 21 % of the lakes are predicted to change to a better category. We have used a fixed pH shift in order to make the approach applicable. This is a rather drastic simplification since the lakes will respond very differently to a reduction in S deposition depending on the original acidity and a number of other factors. The limitations of the approach and an alternative method used by Chester (1982) are discussed in detail. 相似文献
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Elisa Sandra Tanaka de Farias José Carlos Pintro Maria Anita Gonçalves da Silva Antonio Saraiva Muniz Marlene Estevão Marchetti Antonio Nolla 《Journal of plant nutrition》2013,36(3):465-475
The objective of the present study was to evaluate the phytotoxic effect of aluminum (Al) in corn plants in nutrient solution under high ionic strength (0.0094 uM) and low ionic strength (0.00001 uM). Regarding the low ionic strengths, nutrient solution was added daily until the end of the experimental period. The findings showed that the pH of the nutrient solution reduced with the increase in Al concentration, under both high and low ionic strengths solutions. Electrical conductivity of the nutrient solution increased with Al concentrations only in the solution with low ionic strength, demonstrating that the plant was more sensible to the element toxicity, thus reducing its growth and absorption of nutrients. The production of the total dry mass of corn was affected by the increase of Al concentration in the solution only under low ionic strengths, which reinforces the greater activity and absorption of the element under such condition. 相似文献
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Adriana de Farias Jucá Juliana Cantos Faveri Geraldo Magalhães Melo Filho Antônio de Lisboa Ribeiro Filho Hymerson Costa Azevedo Evandro Neves Muniz Luís Fernando Batista Pinto 《Tropical animal health and production》2014,46(7):1249-1256
This study aimed to evaluate sex, the number of lambs per birth, and the family effects on production traits in the Santa Ines breed of sheep by estimating the least square means and coefficient of variance for those traits. A total of 484 lambs were evaluated for the following traits: weight at birth, at weaning, and at 240 days of age; weight gain during the pre-weaning and post-weaning periods; height, width, and length of different body regions; and rib eye area and fat thickness between the 12th and 13th ribs. We observed coefficients of variation higher than 10 % for several traits. Generally, males were larger than females (P?0.05), while lambs from single and double births were larger than lambs from triple births (P?0.05). Family effect was significant (P?0.05) for most traits and explained the highest percentage of residual variance. The results showed good development of Santa Ines sheep, especially during the pre-weaning period but no in post-weaning. Our study also showed that there is an effect of sex, birth type, and family, which must be included in any statistical model for the estimation of least square means and residual variance in ANOVA. 相似文献
10.
Morphological and Morphometric Description of Female Reproductive Tract of Sapajus apella (Capuchin monkey) 下载免费PDF全文
A. R. Lima S. B. Guimarães É. Branco E. G. Giese J. A. P. C. Muniz W. L. A. Pereira P. K. F. da Cunha R. E. Ricci M. A. Miglino 《Anatomia, histologia, embryologia》2015,44(4):262-268
Forest destruction has progressively hampered the survival of many species, and this is why it is so important to study of the lives of primates in captivity. This study aimed to describe the morphological aspects of the female reproductive tract of Sapajus apella. We used five animals obtained from the National Primate Center, Ananindeua – PA. The ovaries were paired, compact and symmetrical and had a smooth surface. The uterine tubes were bilateral and convoluted in adult animals and straight in young individuals. The uterus was simple and located in the pelvic region. The vagina was a long structure due to the position of the uterus. The external genitalia were located in the urogenital perineum and consisted of dark pigmented labia majora and labia minora, a vaginal vestibule as long as the vagina and a well‐developed clitoris. The results showed that the genitals of S. apella resemble those of other Neotropical primates. 相似文献