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Publications

This is a list of publications written by Patuxent employees since Patuxent opened in 1939.  To search for Patuxent's publications by author or title, please click below to go to the USGS Publication Warehouse.

Filter Total Items: 8128

Maui-Molokai forest birds recovery plan, May 1984 Maui-Molokai forest birds recovery plan, May 1984

No abstract available.
Authors
C. B. Kepler, T. Burr, C.B. Cooper, D. Dunatchik, J. Medeiros, J. M. Scott, M. Ueoko, W. Wong

Neurotoxic and teratogenic effects of an organophosphorus insecticide (phenyl phosphonothioic acid-O-ethyl-O-[4-nitrophenyl] ester) on mallard development Neurotoxic and teratogenic effects of an organophosphorus insecticide (phenyl phosphonothioic acid-O-ethyl-O-[4-nitrophenyl] ester) on mallard development

Phenyl phosphonothioic acid-O-ethyl-O-[4-nitrophenyl] ester (EPN) is one of the 10 most frequently used organophosphorus insecticides and caused delayed neurotoxicity in adult chickens and mallards. Small amounts of organophosphorus insecticides placed on birds' eggs are embryotoxic and teratogenic. For this reason, the effects of topical egg application on EPN were examined on mallard...
Authors
D. J. Hoffman, L. Sileo

The significance of diurnal terrestrial emergency of green turtles (Chelonia mydas) in the Gal?pagos Archipelago The significance of diurnal terrestrial emergency of green turtles (Chelonia mydas) in the Gal?pagos Archipelago

The diurnal, nonreproductive emergence of green turtles Chelonia mydas in Galapagos apparently occurs throughout the year on several islands. Turtles on beaches have cloacal temperatures that exceed temperatures of adjacent coastal waters. Basking turtles are predominately females. We hypothesize that females bask to accelerate digestion and fat build-up, necessary antecedents to egg...
Authors
H.L. Snell, Thomas H. Fritts

Some observations on the use of discriminant analysis in ecology Some observations on the use of discriminant analysis in ecology

The application of discriminant analysis in ecological investigations is discussed. The appropriate statistical assumptions for discriminant are illustrated, and both classification and group separation approaches are outlined. Three assumptions that are crucial in ecological studies are discussed at length, and the consequences of their violation are developed. These assumptions are: (1...
Authors
Byron K. Williams

Clutch size, reproductive success, and organochlorine contaminants in Atlantic coast black-crowned night-herons Clutch size, reproductive success, and organochlorine contaminants in Atlantic coast black-crowned night-herons

In 1979, we gathered clutch-size and reproductive-success data on Black-crowned Night-Herons (Nycticorax nycticorax) nesting in three New England and two North Carolina colonies. In 1975, we gathered similar data from one of the New England and one of the North Carolina colonies. Latitudinal differences in clutch initiation were not evident. Mean clutch size was larger in the New England...
Authors
Thomas W. Custer, Gary L. Hensler, T. Earl Kaiser

Cholinesterase inhibition of birds inhabiting wheat fields treated with methyl parathion and toxaphene Cholinesterase inhibition of birds inhabiting wheat fields treated with methyl parathion and toxaphene

Red-winged blackbirds (Agelaius phoeniceus) and dickcissels (Spiza americana) inhabiting wheat fields treated with 0.67 kg AI/ha methyl parathion and 1.35 kg AI/ha toxaphene showed brain cholinesterase (ChE) inhibition compared with birds inhabiting untreated fields. Maximum inhibition occurred about five days after insecticide application. ChE activities again approached “normal” 10...
Authors
K. R. Niethammer, Thomas S. Baskett
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