Population trends, reproductive success, and organochlorine chemical contaminants in waterbirds nesting in Galveston Bay, Texas




King KA
Krynitsky AJ

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The effects of environmental contaminants on the reproductive success of olivaceous cormorants (Phalacrocorax olivaceus ), Laughing gulls (Larus atricilla ), and black skimmers (Rhynchops niger ) nesting in Galveston Bay, Texas were investigated from 1980 through 1982. Populations of cormorants and gulls have remained stable in recent years, but skimmer numbers may have declined. Cormorants produced 1.9 to 2.8 young per pair in nests that remained active throughout the season. Gull and skimmer reproduction was seriously limited by storms and predation. DDE and polychlorinated biphenyl (PCB) residues in carcasses and eggs generally were below levels associated with chronic poisoning and reproductive problems in most species of birds




ASW,Galveston Bay, Birds, breeding success, chlorinated hydrocarbons, contaminants, D 04803 Pollution effects, Eggs, Galveston Bay, Gulls, H SE1.21 WILDLIFE, Larus atricilla, Laughing gull, levels, Nesting, O 4020 POLLUTION - ORGANISMS, organochlorine, P 1000 MARINE POLLUTION, P 6000 TOXICOLOGY AND HEALTH, PCB, pesticides, Phalacrocorax olivaceus, Poisoning, pollution effects, population decline, population dynamics, Populations, Predation, Q1 01504 Effects on organisms, Reproduction, Rhynchops niger, sexual reproduction, storms, Texas, USA, USA,Texas,Galveston Bay, X 24136 Environmental impact