Movements within a Population of Introduced Eastern Cottontail Rabbits

Abstract

Movements of an established population of introduced eastern cottontail rabbits (Sylvtlagus floridanus) were studied on the E. E. Wilson Game Management Area near Corvallis, Oregon, during 1967 and 1968. Juvenile males moved greater distances than adult males, and males moved greater distances than females. There were no differences in the movements of juvenile females and adult females. MOVEMENTS OF INTRODUCED COTTONTAILS * Chapman and Trethewey 155 larger birds, a 1.25-inch mesh would probably give a longer range and a greater speed to the cast. A monofilament net constructed by a commercial company would cost in excess of $500 for the size that we used. We ordered a standard width (6 feet) of netting ( most net companies carry standard widths of monofilament nylon netting) and sewed together the appropriate lengths. The test net cost approximately $50 for materials and $50 for labor. We did not add a fringe to our net, but a fringe might prove useful in reducing the rate of escape. As constructed, our net weighed approximately one-eighth as much as the commercially available knotted nylon nets. In moist situations, the knotted nylon nets tend to absorb water, increasing the weight of the net. The monofilament netting will not absorb water. We feel that the weight of the net is an important factor in determining injury rates of captured birds, particularly when small birds are involved. Finally, the lighter weight allows the use of but two recoilless cannons thereby simplifying the electrical system, giving it less chance for misfiring, and reducing the cost of the propelling charges.