R. B. Clapp, William L. Schipper
1990, 'Elepaio (50) 11-14
No abstract available....
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Publication Extents
Not all publications have extents, not all extents are completely accurateP.O. Class, J.D. Reichel, T.O. Lemke, R. B. Clapp, G.J. Wiles, D.T. Aldan, T.K. Pratt
1990, Micronesica (23) 67-89
J.E. Cadle, R.W. McDiarmid
1990, Proceedings of the Biological Society of Washington (103) 746-768
R.B. Cocroft, R.W. McDiarmid, A.P. Jaslow, P.M. Ruiz-Carranza
1990, Copeia (1990) 631-643
Vocalizations of frogs of the genus Atelopus include three discrete types of signals: pulsed calls, pure tone calls, and short calls. Repertoire composition is conservative across species. Repertoires of most species whose calls have been recorded contain two or three of these identifiable call types. Within a call type, details...
R. B. Clapp
1990, Maryland Birdlife (46) 35
G.S. Butcher, M.R. Fuller, L.S. McAllister, P.H. Geissler
1990, Wildlife Society Bulletin (18) 129-134
W. N. Beyer, G. Miller, J.W. Simmers
1990, Environmental Pollution (65) 19-32
We studied the relation of trace element concentrations in soil to those in house mice (Mus musculus), common reed (Phragmites australis) and ladybugs (Coccinella septempunctata) at five disposal facilities for dredged material. The sites had a wide range of soil trace element concentrations, acid soils and a depauperate fauna....
T. W. Custer, G. Pendleton, H. M. Ohlendorf
1990, Environmental Monitoring and Assessment (15) 83-89
Within-clutch variability of DDE and PCB residues in eggs from 62 clutches of black-crowned night-herons (Nycticorax nycticorax) was small (12% and 17%) compared to among-clutch variability (88% and 83%). Significant correlations between concentrations of DDE (median r=0.8885) and of PCBs (median r=0.8244) occurred when 501 correlations were run on two randomly selected...
R.M. Erwin, V.P. Anders, K. Miles-Iverson
1990, Maryland Magazine (22) 80
The largest night-heron colony in Maryland is located at the foot of the Key Bridge in Dundalk, Maryland, in an industrial area. Foraging herons were followed from the colony during May-July, . Most birds followed landed near industrial/urban sites. Availability of perches and lights (at night) may...
M.B. Camardese, D. J. Hoffman, L. J. LeCaptain, G.W. Pendleton
1990, Environmental Toxicology and Chemistry (9) 785-795
Arsenic (As) has been found at elevated concentrations in irrigation drainwater and in aquatic plants utilized by waterfowl. Mallard (Anas platyrhynchos) ducklings received an untreated diet (controls) or diets containing 30, 100 or 300 ppm As added as sodium arsenate. After 10 weeks blood and tissue samples were collected for...
D. H. Ellis, R.L. Glinski, D.G. Smith
1990, Journal of Raptor Research (24) 98-106
Twenty-six (23 traveling and three point) raptor roadside surveys were conducted during a 29,000 km expedition through nine nations of South America. During roadside surveys, we tallied 41 of the 87 (47%) diurnal raptor species (including vultures) that occur in South America. The number of species observed per route varied...
D. R. Clark Jr., J. W. Spann, C.M. Bunck
1990, Environmental Toxicology and Chemistry (9) 1063-1069
Reproductive parameters of American kestrels (Falco sparverius) were measured through two breeding seasons. Exposure to Kelthane® (containing no DDT-related compounds) at dietary concentrations of 0 (control), 1,3, 10 and 30 μg/g (wet weight) began in late November before, and continued through, the second season. Kelthane thinned eggshells and lowered the...
M.J. Conroy, J.E. Hines
1990, Ring (13) 173-192
We describe MULT, a flexible procedure for analysing ring recovery data. The procedure starts with parametric structures similar to, but more general than, those described by Brownie et al. (1985). Particular models, including those in Brownie et al. (1965), can be obtained by imposing constraints on the general parametric structures....
R.M. Erwin
1990, Colonial Waterbirds (13) 70-71
Discrepancies appear in the literature concerning the influence of time of day and tide on feeding activities of Black Skimmers (Rhynchops niger). Observations from Guyana, South America, suggest that skimmers do feed during the day, but are strongly cued to receding tides....
D. H. Ellis, A.K. Kepler, C. B. Kepler
1990, Journal of Raptor Research (24) 12-18
While conducting seabird surveys along the cruise track of the Soviet oceanographic Research Vessel Akademlk Korolev in the South China Sea in late October, 1988, we encountered about 150 land birds, including about 40 raptors. Most of the raptors were small accipiters, but we also recorded small numbers of Peregrine...
D. H. Ellis, D.G. Smith
1990, The Auk (107) 812-814
Fewer than 40 years ago, Life magazine ran an article decrying the plight of Whooping Cranes (Grus americana) on their wintering grounds at Aransas National Wildlife Refuge (Aransas) along the Gulf Coast. The small flock of approximately 20 birds that summered at Wood Buffalo National Park (Wood Buffalo) in Canada...
J. W. Wiley, J. A. Ottenwalder
1990, Studies on Neotropical Fauna and Environment (25) 65-88
Isla Beata and Isla Alto Velo are small satellites of the Dominican Republic, lying off its southwestern coast. We visited Isla Beata between 26–30 July 1977 and 20–21 October 1978. We explored Isla Alto Velo on 22 October 1978. In addition we made aerial surveys of the islands in 1977...
A.F. O'Connell Jr.
1990, Bar Harbor Times (78) B7
Charles J. Henny
1990, The Auk (107) 808-809
The Osprey (Pandion haliaetus) is now arguably the world's best known bird of prey. The DDT-related Osprey population crash in the northeastern United States resulted in an unparalleled amount of research during the last 20 years. In 1969, when I published my first paper on Ospreys in The Auk, there...
C.S. Robbins
1990, American Birds (44) 681
Matthew C. Perry
1990, Journal of Wildlife Management (54) 687-688
P. V. Winger, D.P. Schultz, W.W. Johnson
1990, Archives of Environmental Contamination and Toxicology (19) 101-117
Planned harbor expansion and industrial developments may adversely affect the economically important aquatic resources of the lower Savannah River, including those at the Savannah National Wildlife Refuge. To establish the present level of chemical contamination in this system, we collected a total of 102 samples of nine species of fish...
R. B. Clapp
1990, Naturalist Review (1990) 5
R. B. Clapp
1990, North American Bird Bander (15) 22
B. Kenneth Williams, J.D. Nichols
1990, Natural Resource Modeling (4) 273-311
Mathematical modeling of migratory bird populations is reviewed in the context of migratory bird management. We focus on dynamic models of waterfowl, since most management-oriented migratory bird models concern waterfowl species. We describe the management context for these modeling efforts, with a focus on large-scale operational data collection programs and...