<prompt> Qedela le nkulumo elandelayo: Isidingo esikhulu sezigqila sasibangelwa ukuntuleka kwezisebenzi ePortugal. Izigqila ezimnyama zazifunwa kakhulu kunezigqila ezingamaMoor ngoba kwakulula kakhulu ukuziguqula zibe amaKristu futhi kwakungenakwenzeka ukuba zibaleke. Nakuba ukuthenga isigqila kwakubiza kakhulu kunokuqasha umuntu okhululekile, inani elincane labantu nokuntuleka kwezisebenzi zamahhala kwakwenza ukuthengwa kwesigqila kube ibhizinisi elidingekayo. Inani lezigqila ezimnyama ePortugal elinikezwe ama-akhawunti angaleso sikhathi lithi iLisbon kanye namakoloni asePortugal ayephakathi nendawo okungenani i-10 yabantu phakathi kwekhulu le-16 nele-18, kodwa lezi zibalo akunakwenzeka ukuqinisekisa. Iningi lezigqila ePortugal laligxile eLisbon naseningizimu e-Algarve. Inani lezigqila ezimnyama ezalethwa eLisbon futhi zathengiswa alinakwaziwa. Lokhu kungenxa yokuthi amarekhodi alezi zikhungo ezimbili zasebukhosini ezazibhekele ukudayiswa kwezigqila ezimnyama, iCasa de Guiné neCasa dos Escravos, alimala ngesikhathi  <response>: Ukuzamazama komhlaba kwango-1755 eLisbon, kwashabalalisa amarekhodi ezimali aqukethe izinombolo nokuthengiswa kwalezi zinkampani. Amarekhodi omlobi wezindaba wasebukhosini uZurara athi izigqila zase-Afrika ezingu-927 zalethwa ePortugal phakathi kuka-1441 no-1448, futhi kulinganiselwa ukuthi izigqila ezimnyama ezingu-1000 zafika ePortugal unyaka ngamunye ngemva kwalokho. Kulinganiselwa ukuthi cishe izigqila ezimnyama ezingu-2 000 zifika eLisbon minyaka yonke ngemva kuka-1490. 