title: Changes in eggshell thickness during incubation: implications for evaluating the impact of organochlorine contaminants on productivity.
mesh_terms: D000818:Animals; D001717:Birds; D004372:Ducks; D004528:Egg Shell / Q000187:drug effects*; D004785:Environmental Pollutants / Q000633:toxicity*; D006843:Hydrocarbons, Chlorinated; D007306:Insecticides / Q000633:toxicity*; D012098:Reproduction / Q000187:drug effects*
chemical_list: D004785:Environmental Pollutants; D006843:Hydrocarbons, Chlorinated; D007306:Insecticides