When a body is taken from poles to equator on the earth, its weight :

Earth's gravitational attraction and hence weight of an object decreases at equator compared to the poles as the equator is situated at a greater distance from the centre of the earth compared to the poles g=GMr2 .Also due to spin  of earth about its own geometrical axis , the object placed on the surface of earth at the equator experiences centrifugal force, which reduces the weight of the object .