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Effects of mercury, selenium, and organochlorine contaminants on reproduction of Forster's terns and black skimmers nesting in a contaminated Texas bay

Archives of Environmental Contamination and Toxicology
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Abstract

Mean mercury (0.40 mu g/g), and geometric mean DDE (1.6 mu g/g) and polychlorinated biphenyl (PCB) (2.3 mu g/g) concentrations in Forster's tern (Sterna forsteri ) eggs from Lavaca Bay were higher than those in tern eggs from a reference area in San Antonio Bay, but residues were not correlated with hatching success. Nest success was similar between bays. Selenium levels in Lavaca Bay tern eggs (0.71 mu g/g) were also comparable to those in eggs from the reference area (0.68 mu g/g). Clutch size (3.1 to 3.4) of Lavaca Bay black skimmers (Rynchops niger ) was no different than that (3.4) at a reference colony near Laguna Vista. Nest success was similar among three Lavaca Bay colonies, but success was lower at one Lavaca Bay colony (40%) than at Laguna Vista (65%). Mean mercury (0.46 mu g/g) and selenium (0.75 mu g/g) concentrations in skimmer eggs from Lavaca Bay wee higher than those (0.19, 0.33 mu g/g) from Laguna Vista.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Effects of mercury, selenium, and organochlorine contaminants on reproduction of Forster's terns and black skimmers nesting in a contaminated Texas bay
Series title Archives of Environmental Contamination and Toxicology
Volume 20
Issue 1
Year Published 1991
Language English
Publisher U.S. Fish and Wildlife Service
Contributing office(s) Upper Midwest Environmental Sciences Center
Description pp. 32-40
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Archives of Environmental Contamination and Toxicology
First page 32
Last page 40