| organochlorine residues and shell thicknesses in eggs of the clapper rail, common gallinule, purple gallinule, and limpkin (class aves), eastern and southern united states, 1972-74. | organochlorine residues and shell thicknesses were surveyed in eggs of the clapper rail (rallus longirostris), purple gallinule (porphyrula martinica), common gallinule (gallinula chloropas), and limpkin (aramus guarauna) from the eastern and southern united states. clapper rail eggs were collected during 1972-73 in new jersey, virginia, and south carolina. during 1973-74, gallinule eggs were collected in florida, south carolina, and louisiana, and limpkin eggs were collected in florida. egg con ... | 1980 | 6780971 |