Rou?h Draft 
w 
( 
The Pacific Ocean Biological Survey Program of the U.S.N.M,, hereafter 
referred to as POBSP, formally began study of pelagic bird ecology in the Fain 
Hawaiian Islands in October, I 963 . Interspecific activity in these colonies may 
prove an important funcixsnxPOBSP Interest in ihu interspecific activity in these 
mammal the 
colonies fostered an initial rat trappng program at Mokapu Point Red-footed Booby 
colony in October 1966 which resulted in mongoose trapping and marking program 
during the ensueing months through June 196?. An attempt was made to determine 
presence 
mammal activity in or near the Red-footed Booby colony and to note any obvious 
interaction between the bird and mammal populations. 
Area Description 
Ulupau Head, at the far northeast tip of Mokapu Peninsula, rises to a maximum 
elevation of 683 feet on the western rim. Tie Red-footed Booby colony located on th 
the southern exposure near the northeastern tip of the point is at an elevation of 
from 100 to 25>0 feet. Koa Facie (Leucaena leucocephala) trees i ) 20 feet high 
form a dense cover and are the dominant plant in the crater area. ♦ Large Kiawe (Prosopis 
pallida ) trees ^row in the ravines and near the upper crest of the colony area rise 
slightly above the surrounding vegertsetfen Koa Hade and SBvmxto: are the preferred 
roost and nesting sites in the booby colony. A h graded kxxxl access road from the 
marine dump skirts the booby colony on the west and north ending near thR northeastern 
tip of the crater 
