Advocacy of trapping as a wildlife and conservation management tool . teaching history of trapping , ethics , and representing the nhta ' s commitment to objectives which are environmentally and socially responsible 作為一個野生動物和保存管理工具套住的倡導。套住的教學歷史,道德,并且環境地并且社會上代表nhta的承諾到是的目的負責。