Why Sterilization Is the Foundation of Humane Population Management

Surgical sterilization permanently prevents reproduction in the treated animal. In the dog systematic review, fertility control was the most studied approach and had the greatest reported population-size effect. Few studies, however, permitted robust conclusions about specific techniques because methods and reporting quality differed substantially.[1]

The cat systematic review found that all included free-roaming-cat studies used trap-neuter-return as all or part of management. For the specific communities examined, it favored sustained sterilization combined with other locally appropriate measures over short-term or one-time activity.[4]

WOAH frames dog population management as a combination of measures intended to improve animal health and welfare, public health and safety, and coexistence between dogs and communities. It identifies reproductive control as one component of this approach, not a substitute for care, prevention, or accountable management.[2]

For individual dogs and cats, sterilization decisions require veterinary assessment. WSAVA reviews both benefits and potential detriments of reproductive-control methods and notes that the appropriate method can vary by species, sex, breed, age, health, lifestyle, and setting.[3]

WOAH identifies population management as relevant to animal welfare, public health, safety, and environmental concerns. It states that reproductive control can reduce breeding behaviors that may increase contact rates between dogs, while population management can help reduce turnover in vaccinated dog populations. These are program-level objectives; sterilization alone does not replace vaccination, responsible ownership, or public-health measures.[2]

Humane sterilization depends on more than procedure availability. WOAH states that surgery requires veterinary input, trained professionals, suitable drugs and equipment, humane handling, asepsis, appropriate anesthesia, pain management, and perioperative monitoring. Public and private veterinary sectors may both be needed to meet demand.[2]

The dog review reports that effectiveness depends on management intensity, including coverage and duration.[1] The cat review found mixed or limited population effects from short-term interventions, while its longer-term programs combined sustained sterilization with additional interventions. It also stressed that no single plan fits every community.[4]

Tourism destinations and tourism organizations can view sustained, community-based sterilization as one component of responsible destination stewardship. This research does not establish a direct tourism return on investment or a direct effect on tourism performance. It does show that fertility control can help reduce future population growth and that humane population-management programs should be sustained, locally adapted, and monitored rather than limited to short-term interventions.[1] [2] [4]

Successful humane population management requires veterinary capacity, community engagement, responsible ownership, vaccination where appropriate, and ongoing evaluation.[2] For CANDi, this reinforces the role tourism organizations can play by partnering with veterinary professionals, governments, and local animal welfare organizations. Together, these long-term, community-based partnerships can contribute to healthier communities, stronger destination stewardship, and a more positive visitor experience.