Detalhes bibliográficos
| Ano de defesa: |
2014 |
| Autor(a) principal: |
Adames, Maurício Spagnolo
 |
| Orientador(a): |
Bombardelli, Robie Allan
|
| Banca de defesa: |
Piana, Pitágoras Augusto
,
Silva, Lilian Carolina Rosa da
|
| Tipo de documento: |
Dissertação
|
| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Universidade Estadual do Oeste do Parana
|
| Programa de Pós-Graduação: |
Programa de Pós-Graduação Stricto Sensu em Recursos Pesqueiros e Engenharia de Pesca
|
| Departamento: |
Recursos Pesqueiros e Engenharia de Pesca
|
| País: |
BR
|
| Palavras-chave em Português: |
|
| Palavras-chave em Inglês: |
|
| Área do conhecimento CNPq: |
|
| Link de acesso: |
http://tede.unioeste.br:8080/tede/handle/tede/1936
|
Resumo: |
The aim of this study was to evaluate the effects of fructose as a modulator of sperm movement on the optimization of the sperm: oocyte in artificial reproduction procedures with the use of cryopreserved semen in Rhamdia quelen. Through the Computer Assisted Sperm Analysis (CASA) were evaluated in four replicas the motility rates, speed and time of sperm activation of the cryopreserved semen after thawing (10 seconds after activation) into six activating solutions containing fructose, concentrated at 0.0; 0.9; 1.8; 2.7; 3.6 and 4.5%. For the testing of fertilization an factorial experimental design (5 x 6) composed of five sperm:oocyte ratio (1x104, 3x104, 5x104, 7x104 e 9x104), six activating solutions containing fructose (0.0; 0.9; 1.8; 2.7; 3.6 and 4.5%) and three replicas or experimental blocks ("pools" of oocytes from three female groups). The effects were evaluated over variable rates of fertilization, hatching and larval normality. In the evaluation of sperm variables a regression analysis showed effect (p<0,05) of the solutions in motility, speed and duration of sperm activation. It was also verified effect (p<0,05) in the index obtained from clustering of such variables called index of sperm movement, with results of theoretical peak performance when 2.85% of fructose in solutions was employed. In the fertilization assay the analysis of response surface showed interactive effect (p<0.05) between sperm:oocyte ratio and fructose concentrations in activating solutions, on the fertilization and hatching rates and of the clustering index of two variables called index of reproductive success. According to the statistical model, sperm:oocyte ratio can be reduced keeping up the rates of fertilization and hatching. The inclusion of fructose in activating solutions has promoted similar theoretical maximum levels for fertilization and hatching when compared to fertilization only in distilled water, however with a saving of 17.77% of mobile spermatozoa: oocyte. The larval normality showed effect (p<0.05) just for the block. It is concluded that the sperm:oocyte ratio can be reduced through the employment of fructose-based activating solutions, without affecting the fertilization, hatching rates and larval normality. |
