4 documents found, page 1 of 1
Wild boars (Sus scrofa scrofa) seminiferous tubules morphometry
Costa, Deiler Sampaio; Silva, José Frederico StraggiottiThe aim of this data was to analyze morphology and function of the seminiferous tubule in adult wild boars. Testes removed by unilateral castration of five animals were used. The testicular parenchyma was composed by 82.1±2.2% of seminiferous tubule and 17.9±2.2% of intertubular tissue. The tubular diameter was 249.2±33.0 µm and the seminiferous tubule lenght per gram of testis was 19.3±4.9m. The spermatogonial...
Use of spermatocrit to estimate sperm concentration of semen from piabanha (Bry...
Shimoda, Eduardo; Andrade, Dalcio Ricardo de; Vidal Junior, Manuel Vazquez; Yasui, George Shigueki; Godinho, Hugo PereiraThe aim of this work was to determine the viability of spermatocrit use in Piabanha's sperm concentration estimation. Gametogenesis of piabanha Brycon insignis (n=29) was induced with crude pituitary extract of carp and semen was further collected. The spermatocrit was determined using cappilar tube micro-centrifuge. The sperm concentration was verified by counting in "Neubauer chamber", after dilution. The ver...
Morphometry of leydig cells in the collared peccary (Tayassu tajacu)
Costa, Deiler Sampaio; Silva, José Frederico Straggiotti; Silveira, Leonardo Serafim daObjetivou-se com esta pesquisa determinar o volume total e individual das células de Leydig, o índice leydigossomático e o número de células de Leydig por testículo e por grama de testículo em catetos. Utilizaram-se testículos de 10 catetos sexualmente maturos, destinados ao abate comercial. O volume total e individual das células de Leydig foi 2,02ml e 1202,74 x 10-12ml, respectivamente. O núcleo e o citoplasm...
Apoptosis in spermatozoa: a new approach in sperm viability evaluation
Bustamante Filho, Ivan Cunha; Silva, José Frederico Straggiotti; Jobim, Maria Inês MascarenhasAnimal reproduction biotechnics are developing day after day. However, almost every applied and studied technology are basicly cellular stressful procedures. Cryopreservation is the most used technic for gamette conservation, although in some species this methodology is not efficiently applied. Apoptosis has been recognized as the one of the major causes of poor post-thaw sperm viability. This review presents n...