Qualidade qu��mica da ��gua residual da cria����o de peixes para cultivo de alface em hidroponia

Aiming to evaluate the association of hydroponic lettuce cultivation with residues from a fish intensive breeding system, a project was carried out in the Aquaculture Center in the FCAV-UNESP at Jaboticabal, SP, Brazil. A closed system was designed in order to allow the water to circulate through the fish tanks, a clarifier tank for removal of residues, a reservoir for biological conversion of ammonia into nitrate, and the hydroponic system. After this process, water returned back to the fish tanks. Three varieties of lettuce, constituting the treatments with four repetitions were evaluated. The results of the chemical analysis of the residual water from the fish tanks indicated the presence of the majority of the mineral nutrients necessary for vegetable development. Their concentration was close to that found in nutrient solutions, used for lettuce hydroponic cultivation, except for potassium and magnesium. The low concentration of magnesium in the water did not prevent lettuce development, although the plants presented visual symptoms of deficiency of this nutrient. Differences were not found between the varieties produced, regarding productivity and the mean weight of fresh plants.

Correla����es entre morfometria ovariana e hormônios em vacas zebus n��o prenhes

The study of ovarian morphometry is directly related to its practical applications to interpret the examination of the reproductive tract of the cow. The objective of this work was to study the ovarian morphometry collected in slaughterhouse and correlations between corpus luteum area, progesterone and cortisol in no pregnant zebu cows. One hundred fourteen pairs of ovaries were collected from slaughterhouse, measured in thickness, length, width and volume, diameter and volume of the follicle, diameter and area of the corpus luteum. Significative difference (p<0.05) were observed for widths of (1.95 cm and 1.83 cm) and volume (p<0.05) of 7.26 ml and 6.23 ml of left and right ovaries respectively. For size and volume of follicles, and diameter and area of the corpus luteum, there was no significative difference between the sides. There was correlation of 0.46 (p<0.01) between left ovary volume �� luteum corpus area, in the presence of follicles with diameters equal or greater than 9 mm, the corpus luteum of the massive and protuberant type were present in 23 (43.39%) of 53 ovaries, predominating in relation to type of massive and incluse 16 (30.18%). There were no significative correlation between corpus luteum area �� progesterone, corpus luteum area �� cortisol and progesterone �� cortisol. In conclusion, the presence of the included corpus luteum in zebu cows could result in error during the rectal palpationexam to estimate the ovarian activity.

Oxida����o lip��dica em peixes: mecanismo de a����o e preven����o

Aquaculture produces food with high nutritive value, however its environmental conditions and management increase the stress reaction of fishes, prejudicing the quality of their products. The lipid oxidation is one of the main causes of the fishery deterioration, due the high unsaturated value of fatty acid of aquatic organisms. This review describes lipid oxidation mechanisms, their analysis methodology and some preventive ways, emphasizing the antioxidants effects of vitamin E utilization in fish's diet.

Qualidade microbiol��gica da ��gua e histopatologia de br��nquias de peixes provenientes de pisciculturas do munic��pio de itapecuru-mirim, Estado do Maranh��o

The present study evaluated the microbiological water quality and tissue lesions in gills from Nile tilapia (Oreochromis niloticus) and hybrid tambacu (Colossoma macropomum female x Piaractus mesopotamicus male). For this, water and gills were collected from fish farming at six locations in Itapecuru- Mirim County, Maranh��o State. Microbiological water analyses revealed contamination by total coliforms, Escherichia coli and heterotrophic bacteria. In the gills, we observed a diversity of Gram-positive and Gramnegative bacteria. The tissue lesions were: lamellar fusion, interlamellar hyperplasia, sub-epithelial edema and telangiectasia. Inflammatory lesions were not observed. Significant statistical difference (p > 0.05) was not detected when comparing different gills lesions during rainy and dry season. The correlation between lesion and pond type was statistically different (p < 0.05) for lamellar fusion and interlamellar hyperplasia which occurred more frequently at ground ponds. Regarding the frequency of lesions in the different fish species, there was statistical difference (p < 0.05), and the tambacu was more sensitive to lamellar fusion while tilapia was more sensitive for the other lesions. In relation to the sampling stations, there was statistical difference for all the gill lesions. In conclusion, tissue lesions are nonspecific and function as a defense mechanism against polluted aquatic environments, without infectious character.

Avalia����o ecotoxicol��gica e risco ambiental dos inseticidas utilizados no controle da larva de Aedes aegypti para Daphnia magna, Lemna minor e peixes

Conselho Nacional de Desenvolvimento Cient��fico e Tecnol��gico (CNPq)

Salga e dassalga de peixes: aspectos qu��micos, f��sicos e efeito antioxidante do extrato aquoso de manjeric��o (Ocimum basilicum)

P��s-gradua����o em Aquicultura - FCAV

Hematologia e ecotoxicidade do teflubenzuron no controle de Trichodina sp. em peixes

Coordena����o de Aperfei��oamento de Pessoal de N��vel Superior (CAPES)

Fator Pr��-digest��o inicial�� e Isoter��pico�� na larvicultura da til��pia-do-Nilo: avalia����o do ��ndice de parasitismo, integridade hep��tica e branquial

P��s-gradua����o em Aquicultura - FCAV

Fauna parasit��ria e altera����es teciduais em peixes oriundos de pisciculturas com mono ou policultivo do m��dio Vale do Itaja��, SC

Coordena����o de Aperfei��oamento de Pessoal de N��vel Superior (CAPES)

Din��mica da qualidade da ��gua em tanques de peixes de sistema pesque-pague: aspectos f��sico-qu��micos e pl��ncton

Conselho Nacional de Desenvolvimento Cient��fico e Tecnol��gico (CNPq)

Perfil microbiol��gico de peixes e ��gua de cultivo em pesque-pagues situados na regi��o nordeste do Estado de S��o Paulo

Conselho Nacional de Desenvolvimento Cient��fico e Tecnol��gico (CNPq)

Estrutura e evolu����o cariot��pica de peixes cicl��deos sul americanos

P��s-gradua����o em Biologia Geral e Aplicada - IBB

Estrutura ecomorfol��gica e tr��fica de peixes de riachos: compara����o entre ambientes com diferentes graus de conserva����o e entre bacias hidrogr��ficas

Conselho Nacional de Desenvolvimento Cient��fico e Tecnol��gico (CNPq)

Comunidades de peixes e integridade bi��tica do C��rrego da ��gua Limpa na fase de pr��-recupera����o de matas ciliares

Funda����o de Amparo �� Pesquisa do Estado de S��o Paulo (FAPESP)

Crioconserva����o de embri��es de peixes neotropicais

P��s-gradua����o em Biologia Animal - IBILCE