Protecting Damara Terns Sterna balaenarum from recreational disturbance in the Namib Desert increases breeding density and overall success

摘要: Because resources and funds available for the conservation management of many threatened species are limited, it is important to determine effectiveness different measures aimed at protecting species. The globally Near Threatened Damara Tern Sterna balaenarum breeds on anthropogenically disturbed beaches central coast Namibia. We assessed breeding numbers, densities success Terns in a loose colony among small barchan dunes Namibian coast. Nests were monitored daily during 2001/02 2002/03 seasons. Information notices erected season vehicle access was restricted prevent human disturbance season. Nest numbers density doubled second season, but decreased significantly from 83% 67%. This unexpected result probably arose increased attracting more predators. Despite this decrease protection number chicks hatching area by 71%. In conjunction with two previous studies off-road vehicles we conclude that benefit reduced prefer nest undisturbed beaches.