Environmental Impact - Wildlife/Vegetation Effects

Gillett, W. H., Haywardjr., J.L., & Stout, J.F. (1975). Effects of human activity on egg and chick mortality in a glaucous-winged gull colony. Condor, 77: 492-495.


Abstract

During studies of glaucous-winged gulls on Colville Island, Washington, the investigators' presence increased chick mortality in areas where they worked, but had no effect on egg mortality. The increase in chick losses resulted largely from chicks moving into adjacent territories and being attacked by neighboring adults when investigators entered the chicks' home territory.

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