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| Registros recuperados: 12 | |
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| Rios,Flavia Sant'Anna; Donatti,Lucélia; Fernandes,Marisa Narciso; Kalinin,Ana Lucia; Rantin,Francisco Tadeu. |
| Hoplias malabaricus (traíra) were experimentally starved (0 to 240 days) and subsequently re-fed for 30 days (after 90 and 240-d fasting). Long-term starvation produced minor changes in muscle composition, but shrinkage of muscle fibres was a conspicuous result. The diameter of muscle fibres decreased gradually and the spaces among them increased as the starvation period progressed. After re-feeding, fish prior starved for 90 days presented partial restoration on diameter of muscle fibres. However, the fibres remained shrunken after re-feeding following 240-d fasting. While the lipid content did not change, the protein levels fell after 240-d fasting, but they were restored after re-feeding |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish; Morphology; Muscle; Proximate composition; Starvation. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000200025 |
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| Romão,Silvia; Donatti,Lucélia; Freitas,Matheus O.; Teixeira,Josiane; Kusma,Josiana. |
| This study aimed to assess the influence of the environment on fish health. Samples of Hoplias malabaricus and Geophagus brasiliensis, were collected from three different environments: area I was urban and areas II and III were rural. Analyses of red blood cell count, microhematocrit, hemoglobin concentration, white blood cell count and differential white cell count in blood smear were carried out. Mean corpuscular volume and mean corpuscular hemoglobin concentration were calculated. To analyze morphological alterations, gills, liver, kidney and gonads were submitted to routine histological processing. Individuals collected from area III had slightly lower blood indices than collected from area I . Severe kidney changes, degeneration of and crystallization... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish; Bioindicators; Biomarkers; Morphological alterations; Hematology. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000400012 |
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| Storti-Filho,Agenor; Damke,Edilson; Carrara,Márcia Aparecida; Batista,Marcia Regina; Donatti,Lucélia; Boer,Cinthia Gandolfi; Svizdinski,Terezinha Inez Estivalet; Consolaro,Márcia Edilaine Lopes. |
| The objective of this study was to determine the effect of medroxyprogesterone acetate (DMPA) on the development and maintenance of Candida albicans in the vagina of oophorectomized Wistar rats. The animals were divided into negative control groups (NCG), which received injections of sterile saline; positive control groups (PCG), which were given injections of estradiol valerate; and progesterone groups (PG), which were given injections of Depo-Provera®. After one week of hormonal induction, vaginal infection by C. albicans was induced in all the groups and detected by vaginal yeast culture and Papanicolaou smear. In addition, scanning and transmission electron microscopy images were obtained to confirm the vaginal infection by yeast in PG. A difference in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Depomedroxyprogesterone acetate/effects; Depomedroxyprogesterone acetate/experimental study; Vulvovaginal candidiasis; Candida albicans. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502011000100021 |
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| Wolff,Luciano Lazzarini; Abilhoa,Vinícius; Rios,Flavia Sant'Anna; Donatti,Lucélia. |
| This study described the feeding habits of the characin Astyanax aff. fasciatus. The diet compositions of specimens from two sites (A and B) on a river in Southern Brazil were compared according to the size of individuals and seasonal period. The collections were performed monthly from March 2005 to February 2006, where the stomach contents of 290 specimens were assessed. Food items for A. aff. fasciatus were basically composed of plants and insects, especially leaf fragments, seeds, fruits, filamentous algae, aquatic and terrestrial insects and insect fragments. At site A, the most common items were insect and plant fragments. Conversely at site B, plant fragments were more representative. In general, all items of animal origin showed the highest feeding... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Resource availability; Feeding flexibility; Omnivore; Niche shifts; Freshwater. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000200018 |
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| Donatti,Lucélia; Fanta,Edith. |
| The Antarctic fish Notothenia coriiceps Richardson, 1844 lives in an environment of daily and annual photic variation and retina cells have to adjust morphologically to environmental luminosity. After seven day dark or seven day light acclimation of two groups of fish, retinas were extracted and processed for light and transmission electron microscopy. In seven day dark adapted, retina pigment epithelium melanin granules were aggregated at the basal region of cells, and macrophages were seen adjacent to the apical microvilli, between the photoreceptors. In seven day light adapted epithelium, melanin granules were inside the apical microvilli of epithelial cells and macrophages were absent. The supranuclear region of cones adapted to seven day light had... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Photic variation; Photoreceptor; Retinomotor movements. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752007000100004 |
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| Donatti,Lucélia; Fanta,Edith. |
| The retina of Metynnis roosevelti Eigenmann, 1915, a very active freshwater fish, was investigated by light and electron microscopy and was found to have a complex neuronal structure that allows rapid responses of visual stimuli. Retina photoreceptors are double cones, single long cones, single short cones and rods. Cone inner segments are arranged as mosaics. The outer nuclear layer contains small nuclei of twin cones, long and wide nuclei of long single cones, spherical large nuclei of short cones, and small dense nuclei of rods. Horizontal, amacrine, bipolar and ganglion neurones are responsible for connections and integration between photoreceptor cells and afferent neurones. The pigmented epithelium comprises a single layer of cylindrical cells each... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish; Retina; Morphology; Red light. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000100011 |
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| Donatti,Lucélia; Fanta,Edith. |
| The Antarctic fish Trematomus newnesi (Boulenger, 1902) occurs from benthic to pelagic habitats, in seasonally and daily varied photic conditions that induce retinomotor movements. Fish were experimentally kept under constant darkness or light, and 12Light/12Dark for seven days. The retinomotor movement of the pigment epithelium was established through the pigment index, while that of the cones was calculated as the length of the myoid. The retinomotor movement of the pigment epithelium in T.newnesi,revealed that the adaptation to constant light occurred in the one hour of exposure, remaining constant for the next seven days. However, the adaptation to constant darkness, was slower. The difference between the mean values of the pigment indices in the time... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Photic variation; Photoreceptors; Retina. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752007000200025 |
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| Donatti,Lucélia; Zaleski,Tânia; Calil,Patrícia; Fanta,Edith. |
| The influence of photoperiod on the ability of Notothenia rossii Richardson, 1844 to detect prey was studied experimentally. In 12L/12D there was the highest number of individuals stimulated visually and chemically while in 24D chemical perception was the same as that observed in 12L/12D, the latter being lower than in 24L. The ultrastructure of chemo- and photo-sensory structures, involved in the detection of food, was studied. The photoreceptor cells of the retina are single and double cones, and rods. Taste buds were concentrated in the central part of upper and lower lips. Their shape is even, but the size is variable. The olfactory rosette has a sensory and a non-sensory epithelium, being rich in different mucosubstances. The conclusion was that in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chemoreception; Microscopy; Photoreception. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752008000200014 |
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| Registros recuperados: 12 | |
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