Speculations on colonizing success of the African clawed frog, Xenopus laevis (Pipidae), in California
M. J. McCoid, T. H. Fritts
1993, South African Journal of Zoology (28) 59-61
The African clawed frog has been established in California for over twenty years. During that period, populations have spread to most of the drainage systems in southern California. It is suggested that a suite of contributing factors, including morphological, behavioural, and biochemical predator avoidance strategies, and reproductive and feeding (cannibalism)...
A new Thomasomys (Mammalia: Rodentia) from the Peruvian Andes
A. L. Gardner, M. Romo
1993, Proceedings of the Biological Society of Washington (106) 762-774
A question of jobs: The two-career couple
M.S. Foster
1993, BioScience (43) 237-237
No abstract available....
Research, conservation, and collaboration: The role of visiting scientists in developing countries
Mercedes S. Foster
1993, The Auk (110) 414-417
As awareness of environmental problems and the need to protect our natural resources or use them wisely has grown, scientists have become increasingly interested in conservation. Some individuals are involved in conservation-related activities through research or teaching, but most of us participate only as citizens concerned about the world in...
Phyllorhynchus Stejneger, leaf-nosed snakes
R.W. McDiarmid, R.J.R. McCleary
1993, Catalogue of American Amphibians and Reptiles (No. 579) 1-5
Overwinter survival of mallards fed selenium
Gary Heinz, M. A. Fitzgerald
1993, Archives of Environmental Contamination and Toxicology (25) 90-94
Adult male mallards (Anas platyrhynchos) were fed diets supplemented with 0, 10, 20, 40, or 80 μg/g selenium in the form of selenomethionine. Mortality in each of these treatments was 0, 0, 25, 95, and 100%, respectively, during a 16-week exposure that started in November. After one week of treatment,...
A new species of a giant Thomasomys (Mammalia, Muridae, Sigmodontinae) from the Andes of north-central Per?
L.M. Leo, A. L. Gardner
1993, Proceedings of the Biological Society of Washington (106) 417-428
Social foraging classes in raptorial birds
D. H. Ellis, J.C. Bednarz, D.G. Smith, S.P. Flemming
1993, BioScience (43) 14-20
No abstract available....
Sex and age identification of palila
J.J. Jeffrey, S.G. Fancy, G.D. Lindsey, P.C. Banko, T.K. Pratt, J.D. Jacobi
1993, Journal of Field Ornithology (64) 490-499
Methods to sex and age Palila (Loxioides bailleui), an endangered Hawaiian finch restricted to subalpine woodlands on Hawai'i, were identified on the basis of measurements and plumage characteristics of 17 museum specimens and 96 known-age, live Palila. Palila undergo a single annual molt during September-December following the breeding season. Presence...
Resource protection for waterbirds in Chesapeake Bay
R.M. Erwin, G.M. Haramis, D.G. Krementz, S.L. Funderburk
1993, Environmental Management (17) 613-619
Many living resources in the Chesapeake Bay estuary have deteriorated over the past 50 years. As a result, many governmental committees, task forces, and management plans have been established. Most of the recommendations for implementing a bay cleanup focus on reducing sediments and nutrient flow into the watershed. We emphasize...
Cryopreservation of American kestrel semen with dimethylsulfoxide
G.F. Gee, C.A. Morrell, J. Christian Franson, Oliver H. Pattee
1993, Journal of Raptor Research (27) 21-25
Semen samples from 15 male American Kestrels (Falco sparverius) were frozen in dimethyl sulfoxide (DMSO). The semen was thawed 1-14 mo later and used to inseminate six females during three breeding seasons. Kestrels inseminated with thawed semen containing 4% DMSO produced only infertile eggs (N = 14). Kestrels inseminated with...
A spouse employment program
M.S. Foster
1993, BioScience (43) 241-242
No abstract available....
Effects of habitat availability on dispersion of a stream cyprinid
Mary C. Freeman, Gary D. Grossman
1993, Environmental Biology of Fishes (37) 121-130
We analyzed temporal changes in the dispersion of the rosyside dace,Clinostomus funduloides, (family Cyprinidae) in a headwater stream, to assess the role of habitat availability in promoting fish aggregation. The dace foraged alone and in groups of up to about 25 individuals, and dispersion varied significantly among monthly censuses conducted...
Satellite telemetry options for avian research
D. H. Ellis, M.R. Fuller
1993, Journal of Raptor Research (27) 87 (abs)
Four manufacturers now produce transmitters in the size range suitable for raptors (3-5% of body mass). Dummies of these transmitters will be displayed and harnessing techniques will be demonstrated. Estimates will be given for: cost, reliability, longevity, mass, availability, programmability, power output and other information essential in deciding on manufacturer...
Nesting season, nest sites, and clutch sizes of crows in Virginia
R. B. Clapp, Richard C. Banks
1993, Raven (64) 90-98
Hooded merganser breeds in northern Virginia
R. B. Clapp, D.A. Melvin
1993, Raven (64) 71-73
W. T. March's birds collected in Jamaica
Richard C. Banks, R. Hole Jr.
1993, Gosse Bird Club Broadsheet (60) 7-9
Telemetry via satellites for raptor studies
M.R. Fuller, D. H. Ellis, S.S. Klugman
1993, Journal of Raptor Research (27) 70 (abs)
Monitoring animal movements by satellite was first ac complished in 1970 with an elk in Wyoming. The large size of early transmitter packages restricted their use to very large animals. Miniaturization of electronic components in the 1980s allowed application of satellite telemetry to large birds. Satellite transmitters have been tested...
Survey and evaluation of contaminants in earthworms and in soils derived from dredged material at confined disposal facilities in the Great Lakes region
W. N. Beyer, C. Stafford
1993, Environmental Monitoring and Assessment (24) 151-165
Soils derived from dredged material were collected, together with earthworms from nine confined disposal facilities located in the Great Lakes Region. These samples were analyzed for 18 elements, 11 organochlorine pesticides, PCBs, and 24 polycyclic aromatic hydrocarbons. The concentrations detected in earthworms were evaluated in terms of their potential hazard...
Use of satellite telemetry for study of a gyrfalcon in Greenland
S.S. Klugman, M.R. Fuller, P.W. Howey, M.A. Yates, J.J. Oar, J.M. Seegar, W.S. Seegar, G.M. Mattox, T.L. Maechtle
1993, Journal of Raptor Research (27) 75-76(abs)
Long-term research in Greenland has yielded 1 8 years of incidental sightings and 2 years of surveys and observations of gyrfalcons(Falco rusticolus) around Sondrestromfjord, Greenland. Gyrfalcons nest on cliffs along fjords and near rivers and lakes throughout our 2590 sq. km study area. Nestlings are present mid-June to...
Type specimens and basic principles of avian taxonomy
Richard C. Banks, Steven M. Goodman, Scott M. Lanyon, Thomas S. Schulenberg
1993, The Auk (110) 413-414
"Ornithology" may be defined as the scientific study of birds. No aspect of avian biology, including management and conservation, can be carried out without reference by name to birds at some taxonomic level. Thus, the names of species of birds, and of groups of species, can fairly be considered...
Nestling eastern phoebes entangled in fishing line
R. B. Clapp
1993, Raven (64) 21-22
The Puerto Rican parrot: Genetic assessment of the captive breeding program
M.K. Brock, B.N. White
1993, AFA Watchbird (20) 58-63
Optimal allocation of point-count sampling effort
Richard J. Barker, John R. Sauer, William A. Link
1993, The Auk (110) 752-758
Both unlimited and fixed-radius point counts only provide indices to population size. Because longer count durations lead to counting a higher proportion of individuals at the point, proper design of these surveys must incorporate both count duration and sampling characteristics of population size. Using information about the relationship between proportion...
Predicting the distribution of breeding forest birds in a fragmented landscape
D.K. Dawson, L.J. Darr, C.S. Robbins
1993, Transactions of the North American Wildlife and Natural Resources Conference (58) 35-43
