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Articles 3031 - 3060 of 4557
Full-Text Articles in Ornithology
Kentucky Warbler (Vol. 57, No. 3), Kentucky Library Research Collections
Kentucky Warbler (Vol. 57, No. 3), Kentucky Library Research Collections
The Kentucky Warbler
No abstract provided.
Kentucky Warbler (Vol. 57, No. 2), Kentucky Library Research Collections
Kentucky Warbler (Vol. 57, No. 2), Kentucky Library Research Collections
The Kentucky Warbler
No abstract provided.
Review Of The Island Waterfowl By Milton W. Weller, And The Hawaiian Goose: An Experiment In Conservation By Janet Kear And A. J. Berger, Paul A. Johnsgard
Review Of The Island Waterfowl By Milton W. Weller, And The Hawaiian Goose: An Experiment In Conservation By Janet Kear And A. J. Berger, Paul A. Johnsgard
Paul Johnsgard Collection
Both of these books deal with insular species of waterfowl. The volume by Weller concentrates on the ecological forces that have shaped the compar- ative ecologies and morphologies of some 30 forms of Anatidae that are confined to the islands of the world; the Kear and Berger book deals with the interesting history of the ill-fated Hawaiian goose, or nene, which has at least temporarily been saved from extinction by heroic conservation measures of the Wildfowl Trust and Hawaiian wildlife personnel.
Kentucky Warbler (Vol. 57, No. 1), Kentucky Library Research Collections
Kentucky Warbler (Vol. 57, No. 1), Kentucky Library Research Collections
The Kentucky Warbler
No abstract provided.
Die Erforschung Der Herpetofauna Der Mongolischen Volksrepublik: Situation Und Perspektiven, Günther Peters
Die Erforschung Der Herpetofauna Der Mongolischen Volksrepublik: Situation Und Perspektiven, Günther Peters
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
First paragraph:
Die Landschaften der Mongolei sind arm an Reptilien- und Amphibienarten. Dieser Umstand mag die Frage aufwerfen, ob herpetologische Untersuchungen in Beschränkung auf das Territorium der MVR eine nennenswerte Perspektive haben könnten, nachdem Artenspektrum und Verbteitung der Species annähernd vollständig erkundet sind. Ein Herpetologe wird zweifellos für seine Arbeit auch in diesem Land eine Zukunft sehen, doch muß wohl von vornherein eingestanden werden, daß das Volumen der Probleme dieses Faches hinter denen der übrigen Disziplinen der Vertebratenzoologie und der Entomologie in einem bescheidenerem Rahmen verbleibt. Dies gilt sowohl im rein wissenschaftlichen als erst recht auch im angewandten Bereich ihrer …
Lavender, A Chick Melanocyte Mutant With Defective Melanosome Translocation: A Possible Role For 10 Nm Filaments And Microfilaments But Not Microtubules, Paula Mayerson, John Brumbaugh
Lavender, A Chick Melanocyte Mutant With Defective Melanosome Translocation: A Possible Role For 10 Nm Filaments And Microfilaments But Not Microtubules, Paula Mayerson, John Brumbaugh
School of Biological Sciences: Faculty Publications
Lavender is a mutation of chick neural-crest-derived melanocytes showing dilute feather pigmentation. This defect, previously attributed to a lack or attenuation of dendrites, was found to be due to a defect in melanosome translocation. The mutant phenotype, of melanin-congested perikarya and pigmentless dendrites is expressed both in vivo and in vitro. Studies with colcemid and cytochalasin B suggest that the avian melanocyte resembles a dispersing amphibian melanophore in its requirement for microfilaments but not microtubules.
Ultrastructural analysis revealed a normal complement of intracellular filaments. Microtubules, however, are scarce. Intermediate (10 nm) filaments surround and are closely associated with intracellular organelles, …
Review Of Observations Of Wildlife, Paul A. Johnsgard
Review Of Observations Of Wildlife, Paul A. Johnsgard
Papers in Ornithology
Nearly everybody has a childhood hero, but only rarely do those heros survive the test of time to stand even taller in the mind's eye when approaching a halfcentury of one's own lifetime. Sir Peter Scott is a man of such stuff; his enormous artistic abilities and capacity for converting those talents into the environmental education of several generations of Britons, and toward the conservation of the earth's natural resources, cause him to stand uniquely alone in the international environmental scene. His book is an informal retrospective look at his own life, his artwork, and his concerns for conservation and …
Pseudogymnophallus Alcae Gen. N. Et Sp. N. (Trematoda: Gymnophallidae) From Alcids (Charadriiformes) In Subarctic Seas, Eric P. Hoberg
Pseudogymnophallus Alcae Gen. N. Et Sp. N. (Trematoda: Gymnophallidae) From Alcids (Charadriiformes) In Subarctic Seas, Eric P. Hoberg
Harold W. Manter Laboratory of Parasitology: Faculty Publications
Pseudogymnophallus alcae gen. n. et sp. n. is described for trematodes from alcids (Charadriiformes: Alcidae) from the North Pacific region (Gulf of Alaska, Bering Sea, and Chukchi Sea): horned puffin, Fratercula corniculuta; tufted puffin, Lunda cirrhuta; parakeet auklet, Cvclorrhvnchus psittacula, and least auklet, Aethia pusilla; and from the western North Atlantic Ocean, (Gulf of St. Lawrence): razorbill, Alca torda. Pseudogymnophallus is distinguished from other genera of Gymnophallidae by the intertesticular position of the ovary; a cylindrical, undivided seminal vesicle; and by an intestinal diverticulum dorsal to the arch of each cecum.
Kentucky Warbler (Vol. 56, No. 4), Kentucky Library Research Collections
Kentucky Warbler (Vol. 56, No. 4), Kentucky Library Research Collections
The Kentucky Warbler
No abstract provided.
An Analysis Of Migration Schedules Of Passerine Birds In Nebraska, Paul A. Johnsgard
An Analysis Of Migration Schedules Of Passerine Birds In Nebraska, Paul A. Johnsgard
Nebraska Bird Review
An Analysis of Migration Schedules of Passerine Birds in Nebraska
The format of this paper follows my earlier one on non·passerine species (NBR 48:26-36). Eastern Kingbird. Seventy-three initial spring sightings range from 24 March to 29 May with a median of 3 May. Half of the records fall within the period 1-7 May. The range of 126 final fall sightings is from 4 August to 14 October, with a median of 9 September. Half of the records fall within the period 116 September.
Western Kingbird. The range of 117 initial spring sightings is from 30 April to 26 May, …
Kentucky Warbler (Vol. 56, No. 3), Kentucky Library Research Collections
Kentucky Warbler (Vol. 56, No. 3), Kentucky Library Research Collections
The Kentucky Warbler
No abstract provided.
Where Have All The Curlews Gone?, Paul A. Johnsgard
Where Have All The Curlews Gone?, Paul A. Johnsgard
Papers in Ornithology
After a period of limited optimism, ornithologists are again in a state of uncertainty and doubt as to the existence of the elusive Eskimo Curlew. In spite of the ever increasing activities of bird watchers, no sightings have been reported from the Texas coast in the last decade, and the present status of this ill-fated bird is impossible to judge. Most of the persons who have summarized its sad story have come to the conclusion that uncontrolled hunting, particularly spring hunting in the Great Plains, was the single most important factor in its demise. Richard C. Banks of the U.S. …
An Analysis Of Migration Schedules Of Non-Passerine Birds In Nebraska, Paul A. Johnsgard
An Analysis Of Migration Schedules Of Non-Passerine Birds In Nebraska, Paul A. Johnsgard
Nebraska Bird Review
One of the major components of the Nebraska Bird Review since its inception has been the annual spring migration and occurrence report, and in more recent years the fall occurrence report has become equally important. Yet, other than an uncompleted effort by W. F. Rapp, Jr. to summarize the first 25 years of spring migration data, these records apparently have not been analyzed by anyone. Part of the problem is the sheer mass of data to be assimilated, and a second issue is the question of how to classify certain species, for the analysis of a winter visitor required different …
Kentucky Warbler (Vol. 56, No. 2), Kentucky Library Research Collections
Kentucky Warbler (Vol. 56, No. 2), Kentucky Library Research Collections
The Kentucky Warbler
No abstract provided.
Resource Partitioning In Breeding Populations Of Marsh Hawks And Short-Eared Owls, Susan C. Linner
Resource Partitioning In Breeding Populations Of Marsh Hawks And Short-Eared Owls, Susan C. Linner
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
During the 1979 breeding season four pairs of northern harriers, or marsh hawks (Circus cyaneus) and four pairs of short-eared owls (Asio flammeus) were studied in Cache Valley, Utah. The study was concerned solely with diurnal resource utilization, and did not examine the owls' nocturnal activities. The home range of each harrier pair overlapped substantially with that of an owl pair. Percent habitat overlap for hawk-owl pairs varied from 39 percent to 72 percent. Observations were made to determine if differences existed in their utilization of habitat and food resources, or in their daily and seasonal …
Metabolism And Solar Radiation In Dark And White Herons Nesting In Hot Climates, Hugh I. Ellis
Metabolism And Solar Radiation In Dark And White Herons Nesting In Hot Climates, Hugh I. Ellis
Biology: Faculty Scholarship
Metabolism, body temperature (Tb), and feather reflectance was measured for dark Louisiana herons (LOU), little blue herons (LB), snowy egrets (SE), and cattle egrets (CE); only LOU nest preferentiallyin shade. The reflectance of LOU and adult LB was 13%-15%; it was 80%-82% for SE, CE, and immature (white) LB. Tb for all four species approximated 40 C; hypothermy was never observed. Basal metabolism (HJb) was 107% of the expected level for LOU, 85% for SE and CE, and 66% for LB. Minimal thermal conductance (C) was calculated as approximately 131% of the expected value for LOU, 115% for SE and …
A Ground Dove At Desoto Nwr, Loren Padelford, Babs Padelford
A Ground Dove At Desoto Nwr, Loren Padelford, Babs Padelford
Nebraska Bird Review
A Ground Dove was sighted at DeSoto National Wildlife Refuge on 18 November 1979, for about ten minutes around 11 AM, in the hedgerows opposite the entrance to the nature trail, south of the swimming beach.
It was a small dove, only slightly longer but chunkier than Tree Sparrows sitting in the same small tree. There was gray scalloping on the head and breast, the eye was dark, the beak light colored at the base, with the rest appearing dark. The wing was grayish with black speckling from shoulder to tip. We noticed a short tail when the bird was …
Kentucky Warbler (Vol. 56, No. 1), Kentucky Library Research Collections
Kentucky Warbler (Vol. 56, No. 1), Kentucky Library Research Collections
The Kentucky Warbler
No abstract provided.
Nesting Ecology Of The Red-Winged Blackbird In North Central Minnesota, Daniel W. Moulton
Nesting Ecology Of The Red-Winged Blackbird In North Central Minnesota, Daniel W. Moulton
Journal of the Minnesota Academy of Science
Reproductive success of a Red-winged Blackbird population nesting in marsh-like habitat In north central Minnesota was estimated. Territorial defense by males began in late April, and nest initiation occurred from mid-May through about mid-July. Nest-starts appeared to be divided into two categories: initial attempts which occurred in late May with a high degree of synchrony, and renesting attempts which occurred from about June 4-July 8, The nesting season lasted only about two months. A minimum of 20 percent of marked females renested on the study area, and others may have renested elsewhere. Three of the six females that renested switched …
Growth Patterns, Behavior And Food Items Fed To Nestling Great Horned Owls (Bubo Virginianus), Rodney Harris, Earl L. Hanebrink
Growth Patterns, Behavior And Food Items Fed To Nestling Great Horned Owls (Bubo Virginianus), Rodney Harris, Earl L. Hanebrink
Journal of the Arkansas Academy of Science
No abstract provided.
Sage Thrasher (Oreoscoptes Montanus), A New State Record, Norman Lavers
Sage Thrasher (Oreoscoptes Montanus), A New State Record, Norman Lavers
Journal of the Arkansas Academy of Science
No abstract provided.
Copulatory Behavior Of The American Bittern [Short Communications], Paul A. Johnsgard
Copulatory Behavior Of The American Bittern [Short Communications], Paul A. Johnsgard
Papers in Ornithology
Describes the copulatory behavior of the American bittern, Botaurus lentiginosus, with line-drawings.
Pheasants In Asia 1979: Proceedings Of The First International Symposium On Pheasants In Asia (November 21-23, 1979 : Kathmandu, Nepal), Keith Howman, Christopher Savage
Pheasants In Asia 1979: Proceedings Of The First International Symposium On Pheasants In Asia (November 21-23, 1979 : Kathmandu, Nepal), Keith Howman, Christopher Savage
Galliformes Specialist Group and Affiliated Societies: Conference Proceedings
Message from His Majesty King Birendra Bir Bikram Shah Dev
Inaugural Address by the Rt. Hon. Prime Minister
Welcome Address by the Chief Conservator of Forests
Reply by Keith Howman, Chairman of the Conference
Keynote Papers
Forestry, National Parks and Conservation in Nepal, B. N. Upreti
Pheasant Conservation: A Minimum Programme? Christopher D.W. Savage
Reports on the Status of Pheasants
Nepal (1) Introductory Paper, Karna Sarkya
Nepal (2) Status of the Pheasants of Nepal, J. O. M. Roberts
Status of the Pheasants in Pakistan, Z. B. Mirza
Status of the Pheasants, Malaysia and Indonesia, G. W. H. Davison
The Himalayas: …
Proceedings Of Perdix Ii: Gray Partridge Workshop, Forest, Wildlife And Range Experiment Station, University Of Idaho, The Wildlife Society, Idaho Cahpter, Wildlife Management Institute
Proceedings Of Perdix Ii: Gray Partridge Workshop, Forest, Wildlife And Range Experiment Station, University Of Idaho, The Wildlife Society, Idaho Cahpter, Wildlife Management Institute
Galliformes Specialist Group and Affiliated Societies: Conference Proceedings
Proceedings of Perdix II: Gray Partridge Workshop (March 18-20, 1980, Moscow, Idaho, United States)
The proceedings for this symposium have been divided into three parts: professional papers, a continent-wide management/research plan, and a bibliography. All of the papers were refereed by two or three people working in the field.
Papers Presented
The Distribution and Density of Gray Partridge in Northern New York, David E. Austin
Habitat Utilization by Gray Partridge (Perdix perdix L.) Prenesting Pairs in East-Central Wisconsin, Kevin E. Church, Hallett J. Harris, and Richard B. Stiehl
An Evaluation of Gray Partridge (Perdix perdix) Aging Criteria, …
Evaluation Of Potential Wild Turkey Habitat In Eastern Illinois, Cara B. Daugherty
Evaluation Of Potential Wild Turkey Habitat In Eastern Illinois, Cara B. Daugherty
Masters Theses
Reestablishment of the wild turkey has been successful in the southern part of Illinois where large established tracts of woodland occur. However, turkeys are capable of surviving in areas with less forest cover, if food, nesting materials and protection are available. This project evaluated the potential turkey habitat of a 14-county area of eastern Illinois along the drainage of the Wabash River. Six potential release sites were selected and the habitat evaluated. In these areas, oak (Quercus spp.) and hickory (Carya spp.) were the dominant tree species. Disturbance from human populations was determined in each of …
Kentucky Warbler (Vol. 55, No. 4), Kentucky Library Research Collections
Kentucky Warbler (Vol. 55, No. 4), Kentucky Library Research Collections
The Kentucky Warbler
No abstract provided.
Kentucky Warbler (Vol. 55, No. 3), Kentucky Library Research Collections
Kentucky Warbler (Vol. 55, No. 3), Kentucky Library Research Collections
The Kentucky Warbler
No abstract provided.
Kentucky Warbler (Vol. 55, No. 2), Kentucky Library Research Collections
Kentucky Warbler (Vol. 55, No. 2), Kentucky Library Research Collections
The Kentucky Warbler
No abstract provided.
The Early Life History Of The White And Black Crappie In Rough River Lake, Kentucky, Gary Overmann
The Early Life History Of The White And Black Crappie In Rough River Lake, Kentucky, Gary Overmann
Masters Theses & Specialist Projects
Crappies spawned in Rough River Lake from April 29 to July 9. Larvae were first collected on May 3 when the lake temperature reached 17 C. A total of 7369 crappie was taken from may 3 to August 1. The maximum number of crappies occurred from May 30 to June 20. The developmental chronology was described for specimens 4.75 mm to 29 mm total length. Meristic characters averaged 10.8 for preanal myomere count, 21.1 for postanal myomere count, 31.9 for total myomere count and 0.62 for preanal length to postanal length ratio. Densities of larvae were low early in the …
The Breeding Birds Of Nebraska, Paul A. Johnsgard
The Breeding Birds Of Nebraska, Paul A. Johnsgard
Paul Johnsgard Collection
This brief annotated list of Nebraska's breeding birds is the direct outgrowth of the work involved in the preparation of a forthcoming book titled "The Birds of the Great Plains," which will include range maps for all species except extinct or extirpated ones, and will also provide information on breeding habitat, nest location, clutch size, incubation period, and breeding biology. The purpose of the present compilation is to provide a convenient summary for Nebraska alone, amplifying some of the more general statements of that book, and pointing out uncertain or interesting situations needing further attention from field ornithologists. It includes …