sentences:  They recorded hunters killing dozens of sea lions at a time for skin and oil, and sportsmen shooting seabirds purely for sport.Due to a scarcity of regional chicken farms at the time, seabird eggs were priced at up to a dollar per dozen, encouraging egg harvesting and reducing the bird colony population.Finley and Bohlman suggested a wildlife refuge to Roosevelt for protecting dwindling populations and ensure survival of seabird and marine mammal populations.