"Non-human primates" to chyba ci z rzędu naczelnych, którzy nie są homo sapiens (nie mylić z rządem i naczelnym przywódcą, co do nich nie ma wątpliwości ;).
Co do zasady: "Replace, Reduce, Refine
The concept of the “Three Rs”, put forward by Russell and Burch in their 1959 ‘The Principles of Humane Experimental Technique’, can be defined as procedures to:
Completely replace the need for animal experiments
Reduce the numbers of animals required
Diminish the amount of pain and distress suffered by animals
while meeting the needs of man and other animals."