ABSTRACT
Maintaining genetic variability is an important part of the conservation of endangered species, so the construction of germplasm banks is essential. Several species of the genus Mazama endure constant pressure in their natural habitat and are threatened with extinction. The correct manipulation and adequacy of the diluents and cryoprotectants must be studied to be successful in the formation of these banks. The purpose of this study was to evaluate the efficiency of three different cryoprotectants in sperm cryopreservation in the species Mazama americana: 6% glycerol (GLY), 3% ethylene glycol (ETG), and 5% dimethylformamide (DMF). Semen was obtained with the lateral deviation of the penis to an artificial vagina. In the pre-freeze and post-thaw periods, motility, vigor, membrane integrity, acrosome integrity, and sperm cell morphology were evaluated for each of the cryoprotectants. Post-thaw motility was higher when semen was frozen with cryoprotectants GLY and DMF (55.31 ± 7.39 and 55.94 ± 2.77, respectively), compared with the result obtained for ETG (48.13 ± 2.39). For major defects (MaD), a difference was observed between the pre- and post-cryopreservation periods, such that DMF generated a higher number of post-thaw MaD (25.94 ± 5.37). All cryoprotectants were efficient for cryopreservation of M. americana semen, resulting in samples with satisfactory viability after thawing. However, the medium with the cryoprotectants GLY, at a concentration of 6%, and DMF, at a concentration of 5%, were preferable.
Subject(s)
Semen Preservation , Semen , Animals , Cryopreservation , Cryoprotective Agents , Female , Freezing , Glycerol , Humans , Male , Sperm Motility , Spermatozoa , VaginaABSTRACT
The aim of this study was to characterize the protein profile of ovarian follicular fluid (FF) of brown brocket deer (Mazama gouazoubira). Five adult females received an ovarian stimulation treatment and the FF was collected by laparoscopy from small/medium (≤3.5 mm) and large (>3.5 mm) follicles. Concentrations of soluble proteins in FF samples were measured and proteins were analyzed by 1-D SDS-PAGE followed by tryptic digestion and tandem mass spectrometry. Data from protein list defined after a Mascot database search were analyzed using the STRAP software tool. For the protein concentration, no significant difference (P > 0.05) was observed between small/medium and large follicles: 49.2 ± 22.8 and 56.7 ± 27.4 µg/µl, respectively. Mass spectrometry analysis identified 13 major proteins, but with no significant difference (P > 0.05) between follicle size class. This study provides insight into elucidating folliculogenesis in brown brocket deer.
Subject(s)
Deer , Animals , Female , Follicular Fluid , Ovarian Follicle , Ovulation InductionABSTRACT
O desenvolvimento de técnicas não invasivas para a obtenção de sêmen de cervídeos facilita a criação de bancos genômicos, que são importantes instrumentos para a conservação ex situ e in situ. Este trabalho teve como objetivo criar uma metodologia não-invasiva de coleta de sêmen e comparar duas técnicas de coleta em quatro espécies do gênero Mazama: M. americana, M. gouazoubira, M. nana e M. nemorivaga. Para tanto, foram utilizados seis machos (M) e duas fêmeas (F) da espécie M. americana, 3M e 2F de M. gouazoubira, 1M e 1F de M. nana e 2M e 1F de M. nemorivaga. Para cada técnica testada, foi realizado um período de habituação dos animais ao manejo. Em seguida, duas técnicas de condicionamento e coleta foram avaliadas. Na primeira delas foi utilizada uma fêmea em estro com desvio lateral do pênis para vagina artificial (FEDL), obtendo-se a coleta de 50% dos indivíduos (100% dos machos de M. gouazoubira e 50% dos machos de M. americana), não obtendo ejaculados das demais espécies. Na segunda técnica, utilizando um manequim taxidermizado com urina de fêmea em estro (MUFE) não foi possível a coleta de nenhum ejaculado. Em todas as fases foi observado o comportamento do macho quanto ao tempo de interesse e aproximação, reflexo de "Flehmen", ato de cheirar ou lamber, exposição do pênis, ereção, número de falsas montas, tentativas de cópula e ocorrência de agressividade entre os animais.
The development of noninvasive techniques for obtaining semen from deer facilitates the creation of genome banks, which are important tools for ex situ and in situ conservation. This study aimed to establish a noninvasive method of semen collection and compare two techniques of collection in four species of the genus Mazama: M. americana, M. gouazoubira, M. nana and M. nemorivaga. To achieve this, 6 males (M) and 2 females (F) of the species M. Americana, 3M and 2F of M. gouazoubira, 1M and 1F of M. nana and 2M and 1F of M. nemorivaga were used. For each technique tested, a period of habituation to animal handling was conducted; then, the two conditioning techniques and collection were evaluated. In the first, a female in estrus was used with lateral deviation of the penis to an artificial vagina (FEDL), yielding collection from 50% of the males (100% from M. gouazoubira and 50% from M. americana), with no ejaculate from the remaining species. In the second technique, using a taxidermized dummy with urine from females in estrus (MUFE), no semen collection was possible. During all stages, male behavior was observed regarding the time of interest and approximation, the "Flehmen" response, the act of sniffing or licking, exposure of the penis, erection, number of false mounts, attempts at copulation and the occurrence of aggression between the deer.
