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BIBTEX RIS

Use of two anesthetic combinations for semen collection by electroejaculation from captive coatis (Nasua nasua)

2009; Elsevier BV; Volume: 71; Issue: 8 Linguagem: Inglês

10.1016/j.theriogenology.2009.01.003

1879-3231

Felipe Farias Pereira da Câmara Barros, João Paulo Araújo Fernandes de Queiroz, Antônio Cavalcante Mota Filho, E.A.A. Santos, Valéria Veras de Paula, Carlos Iberê Alves Freitas, Alexandre Rodrigues Silva,

Hormonal and reproductive studies

The objective was to compare the effects of ketamine-xylazine or tiletamine-zolazepam combinations as anesthetic protocols for captive coatis (Nasua nasua) for semen collection by electroejaculation. Five mature male coatis were physically restrained and then anesthetized by im injections of ketamine (10mg/kg) plus xylazine (1mg/kg) or a tiletamine-zolazepam combination (8 mg/kg). For the two combinations, additional quarter-doses of ketamine or the tiletamine-zolazepam combination were administered when necessary. Semen was collected by electroejaculation and immediately evaluated for color, volume, pH, sperm motility, vigor, morphology, acrosomal integrity, and percentage of live cells. Overall, collection of nine ejaculates was attempted from five animals for each treatment. Regardless of the anesthetic combination, all animals developed an erection during each attempt to collect semen. Ejaculates were obtained in all (9 of 9) attempts that used ketamine-xylazine for anesthesia, but in only 3 of 9 attempts (P<0.05) when tiletamine-zolazepam was used. All ejaculates contained sperm, with no significant differences in semen characteristics between the two anesthetic combinations. Recovery was smooth in all animals. In conclusion, semen collection by electroejaculation in coatis was significantly more successful with the use of a ketamine-xylazine combination than with tiletamine-zolazepam.