Autor(es): Tebet, Jussara Maria [UNESP] ; Ferreira de Souza, Fabiana [UNESP] ; Mello Martins, Maria Isabel [UNESP] ; Chirinéa, Viviane Helena [UNESP] ; Candido de Carvalho, Jaqueline [UNESP] ; Papa, Frederico Ozanam [UNESP] ; Lopes, Maria Denise [UNESP]
Data: 2022
Identificador Persistente: http://hdl.handle.net/11449/229706
Origem: Oasisbr
Assunto(s): Acrosome-injury; Cat; Cryopreservation; Cryoresistency; Wild-animal
Made available in DSpace on 2022-04-29T08:35:25Z (GMT). No. of bitstreams: 0 Previous issue date: 2022-01-01
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
This study aimed to evaluate the cryopreservation effects on the semen of oncilla (Leopardus guttulus, n = 5, 15 ejaculates) and ocelot (Leopardus pardalis, n = 5, 17 ejaculates) and compare two extenders (commercial and non-commercial extender). An andrological exam was conducted (testicle measurements and penis evaluation), including semen collection by electroejaculation. After collection, the semen was assessed to volume, color, pH, sperm motility, vigor, sperm number in the ejaculate, viability, membrane integrity, and sperm morphology. Samples were centrifuged (300 g for 10 min) and pellet diluted in two extenders (TRIS/glucose/egg yolk and BotuCRIO®), packed into 0.25 mL French straws (20 × 106 spermatozoa/mL), equilibrated at 5 °C for 1 h (<0.5 °C/min), freezing in nitrogen vapor for 20 min. Thawing was achieved at 46 °C for 15 min. Thawed samples were evaluated to the same characteristics and ultrastructural analysis. There is no difference for extenders, but in ocelot the spermatozoa maintained higher quality after thawing. Major defects were increased in thawed samples, especially acrosome injuries, in both species. Semen contamination by urine was remarkable to oncilla (53% of the ejaculates) which can have reduced sperm cryoresistance of this species. Ultrastructural analysis endorsed morphological analysis under light microscopy and identified cells with acrosome vesiculation. In conclusion, the spermatozoa of ocelot were more cryoresistent and the extender commercial and non-commercial were suitable for their cryopreservation. Other extenders should be investigated for oncilla.
Núcleo de Gestão de Programas NGP8/CTR8/DGR/CFB Secretaria de Infraestrutura e Meio Ambiente de São Paulo, São Paulo
Departamento de Cirurgia Veterinária e Reprodução Animal FMVZ Universidade Estadual Paulista UNESP, São Paulo
Departamento de Clínicas Veterinárias Universidade Estadual de Londrina UEL, Paraná
Santo Amaro University UNISA, São Paulo
Departamento de Cirurgia Veterinária e Reprodução Animal FMVZ Universidade Estadual Paulista UNESP, São Paulo
FAPESP: FAPESP 02/03761–8
