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Discriminant analysis in wildlife research: Theory and applications

B. Kenneth Williams

D.E. Capen, editor(s)

1981, Book chapter, The Use of Multivariate Statistics in Studies of Wildlife Habitat

Discriminant analysis, a method of analyzing grouped multivariate data, is often used in ecological investigations. It has both a predictive and an explanatory function, the former aiming at classification of individuals of unknown group membership. The goal of the latter function is to exhibit group separation by means of linear...

PCBs and organochlorine pesticides in wild mink and river otters from Oregon

Charles J. Henny, L. J. Blus, S.V. Gregory, C. J. Stafford

Joseph A. Chapman, Duane Pursley, editor(s)

1981, Book chapter, Worldwide Furbearer Conference Proceedings: August 3-11, 1980, Frostburg, Maryland, USA

Mink (Mustela vison) and river otters (Lutra canadensis) collected during the 1978-1979 trapping season in Oregon were analyzed for organochlorine pesticide and polychlorinated biphenyl (PCB) residues. PCB residues were most frequently encountered in both species from the Lower Columbia River. PCB residues in 6 of 9 Columbia River mink livers...

Bird activity levels related to weather

C.S. Robbins

C. John Ralph, J. Michael Scott, editor(s)

1981, Book chapter, Estimating Numbers of Terrestrial Birds

The Breeding Bird Survey data bank serves as a primary source for studying effects of sky cover, wind speed, and temperature on bird census results. Other standardized methods, such as spot-mapping (Breeding Bird Census), point counts, banding, and the Winter Bird Survey, provide additional, but limited, means of assessing...

Problems in separating species with similar habits and vocalizations

C.S. Robbins, R.W. Stallcup

C. John Ralph, J. Michael Scott, editor(s)

1981, Book chapter, Estimating Numbers of Terrestrial Birds

The possibilities for species misidentification based on vocalization or habitat association are high. However, the magnitude of the errors actually perpetrated is generally within an acceptable range in most types of bird survey work. Examples of problems discussed are: congeners that are similar in appearance or in song (such...

Analysis of bird survey data using a modification of Emlen's method

F. L. Ramsey, J. M. Scott

C. John Ralph, J. Michael Scott, editor(s)

1981, Book chapter, Estimating Numbers of Terrestrial Birds

The fauna of bottomland hardwoods in southeastern United States

C.H. Wharton, V.W. Lambou, J. Newsom, P. V. Winger, L.L. Gaddy, R. Mancke

J. R. Clark, J. Benforado, editor(s)

1981, Book chapter, Developments in Agricultural and Managed Forest Ecology

Reproductive tests of diazinon on bobwhite quail

K. L. Stromborg

D.W. Lamb, E.E. Kenaga, editor(s)

1981, Book chapter, Avian and Mammalian Wildlife Toxicology: Second Conference

Diazinon was fed at sublethal levels to reproductively active bobwhite (Colinus virginianus). Thirty pairs were given constant concentrations (0, 35. 50, 72, 104, or 150 ppm) for 3 weeks (Constant group). Another 30 pairs (Pair-fed group) were matched to these by body weights and were fed the amounts of untreated...

Formalin preservation of avian blood for organochlorine analysis

C. J. Stafford, W. H. Stickel

D.W. Lamb, E.E. Kenaga, editor(s)

1981, Book chapter, Avian and Mammalian Wildlife Toxicology: Second Conference

Blood biopsy for chemical analysis is a valuable technique for evaluating chemical exposure of birds in the wild without harming the birds. Field conditions, however, often make sample storage difficult. Better methods than freezing are needed to improve the interpretive value of chemical analysis of the sample....

Diagnostic brain residues of dieldrin: Some new insights

G. H. Heinz, R.W. Johnson

D.W. Lamb, E.E. Kenaga, editor(s)

1981, Book chapter, Avian and Mammalian Wildlife Toxicology, Second Conference: a symposium

Forty adult male cowbirds were fed a diet containing 20 ppm dieldrin; 20 of the birds were randomly selected to die from dieldrin poisoning and 20 were sacrificed when dieldrin had made them too sick to eat. An average of 6.8 ppm dieldrin (range of 1.51 to 11.7) in the...

Inorganic and organic mercury chloride toxicity to Coturnix: sensitivity related to age and quantal assessment of physiologic responses

E. F. Hill

1981, Book

The toxicities of mercuric chloride (HgCl(,2)) and methylmercuric chloride (CH(,3)HgCl) were compared for coturnix (Coturnix coturnix japonica) from hatching to adulthood. Comparisons were based on: (1) Median lethal dosages (LD50) derived by administering single peroral and single intramuscular dosages of mercury, (2) median lethal concentrations (LC50) derived by feeding mercury...

Responses of Raptorial Birds to Low Level Military Jets and Sonic Booms: Results of the 1980-1981 Joint U.S. Air Force-U.S. Fish and Wildlife Service Study

D. H. Ellis

1981, Book

Summary: For this study, we gathered several kinds of data to determine the likely effects of low level jets and sonic booms on nesting Peregrine Falcons and other raptors. We directly observed responses to worst case stimulus loads: responses to extremely frequent and extremely nearby jet aircraft were often...

Landsat image map of the Al Muwayh quadrangle, sheet 22E, Kingdom of Saudi Arabia