Summary

Description

Data on the breeding biology of tufted puffins, blacklegged kittiwakes, glaucouswinged gulls, and common murres nesting at Porpoise Rocks were collected during the summers of 1976, 1977 and 1978. Data were also collected on the breeding biology of arctic terns, Canada geese, black oystercatchers and semipalmated plovers nesting in Constantine Harbor and near Phipps Rocks. A summary of the 1976, 1977 and 1978 breeding population estimates and hatching success the seabird colonies in the Porpoise RocksConstantine Harbor area is presented in Table 1. The phenology of reproductive activities of the seabirds in the Porpoise RocksConstantine Harbor area in 1976 Nysewander and Knudsson 1977, 1977 Sangster et al. 1978 and 1978 is presented in Table 2.