Elizabeth Romagosa

• Abstract

  Studies of minerals have been developed in order to ensure better absorption of these nutrients in the intestinal tract of fish without entering the ion competition process, usually determined by the presence of a higher concentration of mineral ions. The present study aims to evaluate the replacement of minerals (selenium, zinc, iron, copper and manganese) inorganic for organic forms in …

  DIETS SUPPLEMENTED WITH MINERAL ORGANIC AND INORGANIC FOR NILE TILAPIA Oreochromis niloticus (phases: juvenile, breeder, larval), AP.R

• Abstract

  One of the challenges of tilapia production chain is to determine what the most appropriate diet, to ensure better reproductive efficiency. Bibliographic and scientific surveys prove that experiments with broodstock nutrition present conflicting results. This experiment aims to assess the reproductive performance of Nile tilapias, lineage GIFT, fed with different protein levels (32, 38, 4…

  Practical diets for Nile Tilapia breeding, Oreochromis niloticus, strain GIFT, AP.R

• Abstract

  The Paraíba do Sul River Basin is located in the region with the highest level of urban and industrial development in the country, geografically isolated from the other basins. It has been suffering the impact of anthropic activity, threatening with extinction a noble endemic fish species, the "surubim-do-Paraiba", Steindachneridion parahybae. The impact of the environmental degradation o…

  Gametes and artificial fertilization of surubim-do-paraíba, Steindachneridion parahybae, an endangered species, AP.R

(Only some records are available in English at this moment)

• Abstract

  Cryopreservation of fish gametes is an important tool in the conservation of genetic material from species, especially endangered ones like the surubim-do-Paraíba, Steindachneridion parahybae. In the present study will be evaluated aspects to cryopreservation of oocytes, aiming to make a satisfactory protocol. The toxicities of oocytes at different concentrations of cryoprotectants tests …

  Cryopreservation of surubim-do-paraíba (Steindachneridion parahybae) oocites, BP.PD

• Abstract

  Digestive enzymes reflect the characteristics digestive of the fish and influence the digestion and absorption of food. This study aimed to evaluate the activity of digestive enzymes (trypsin, pepsin, amylase and alanine phosphatase) in embryonic stages (eggs) and larvae originating from breeding of Nile Tilapia, GIFT strain, fed practical diets containing different levels of crude protei…

  Digestive enzymes in embryogenesis of Nile Tilapia, Oreochromis niloticus, GIFT strain, BP.MS

• Abstract

  In fish, the reproductive seasonality is associated not only to the action of endogenous rhythms, but also physiological changes conditioned to environmental factors. Thus, it is postulated that the manipulation of these factors such as photoperiod and temperature could result in the shortening or extension of the reproductive cycle, with the possibility of obtaining spawning during diffe…

  Manipulation of hours of light and temperature on induced spawning of the lambari-do-rabo-amarelo, Astyanax altiparanae in winter, BP.MS

(Only some records are available in English at this moment)

• Abstract

  The benefits that cryopreservation of animal cells can provide are innumerable and undeniable. However, many difficulties still exist to establish efficient protocols, and in the case of fish oocytes, to guarantee their viability. In this way, studies are needed to deepen the knowledge about cryobiology of animal cells, the process of ice formation, and their impact on the injuries caused…

  Cryopreservation: the crystals ice formation and their relation to the cell injuries, BE.EP.PD

• Abstract

  The digestive digestive enzymes reflect the characteristics of the fish and affect digestion and absorption of food. This study aimed to evaluate the activity of digestive enzymes (trypsin, pepsin, alanine phosphatase, amylase, lipase and leucine-alanine peptidase) in the embryonic and larval stages of breeding of Nile tilapia, GIFT strain, fed levels of protein diets. The experiment was …

  Protein diets on the activity of digestive enzymes in eggs and larvae of tilapia, Oreochromis niloticus, BE.EP.MS