Laparoscopic Ovariohysterectomy in Asian Small-clawed Otters (Aonyx cinerea)

Abstract

　Female Asian small-clawed otters (Aonyx cinerea) in aquariums and zoos may require sterilization to prevent reproduction and disease or for pedigree-based genetic management. Contraceptive surgery requires ovariohysterectomy or ovariectomy via laparotomy. However, there is a concern that otters may develop various complications due to self-injury at incision sites, especially after procedures requiring longer incisions. Laparoscopic ovariohysterectomy was chosen to prevent these complications in two female otters at the Osaka aquarium KAIYUKAN. To perform laparoscopic ovariohysterectomy, a three-portal technique was used. The surgical durations were 45 and 23 minutes. The minimally invasive procedure was feasible in both cases, and there were no significant complications. Laparoscopic surgery appears suitable for ovariohysterectomy in captive Asian small-clawed otters.