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Articles 19441 - 19470 of 19766
Full-Text Articles in Ecology and Evolutionary Biology
The Breeding Population Of Waterfowl On The Chippewa National Forest, John Mathiesen
The Breeding Population Of Waterfowl On The Chippewa National Forest, John Mathiesen
United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications
The purpose of this paper is to describe the characteristics of the breeding waterfowl population on the Chippewa National Forest in north central Minnesota.
Water Chemistry Survey Of Boulder Basin, Lake Mead, P. R. Tramutt, Bureau Of Reclamation
Water Chemistry Survey Of Boulder Basin, Lake Mead, P. R. Tramutt, Bureau Of Reclamation
Publications (WR)
The survey results indicate that the impoundment of water behind Hoover Dam has not adversely affected the dissolved oxygen (DO) content and that water quality and DO content were uniform regardless of depth. The study made in April-May 1964 will provide water quality data of Lake Mead prior to releases from Lake Powell as a basis for evaluating Lake Powell's effect on water quality and limnology of Lake Mead. The performance of a DO analyzer was tested and found unsatisfactory at depths below 150 ft. Parameters tested by standard chemical analyses of water samples in the Denver Laboratory and by …
Amphibians And Reptiles Of Vigo County, Indiana, David Rubin
Amphibians And Reptiles Of Vigo County, Indiana, David Rubin
All-Inclusive List of Electronic Theses and Dissertations
Vigo County, Indiana is an extremely interesting area for herpetological studyo Its geographical location allows for the interplay of faunal elements from east, west, north, and south (Smith and minton, 1957) and its physiography permits investigation of the relations of terrain and glacial geology to herpetofaunal distribution. Blatchley (1891, 1899) published two papers on the amphibians and reptiles of the county and Allyn and Shockley (1938) reported on the county's salamandersa The present paper has the following objectives: to determine which species occur or have recently occurred in Vigo County; to determine amphibian and reptile distribution in the county; to …
Aspen-Elk Relationships On The Northern Yellowstone Winter Range, William J. Barmore Jr.
Aspen-Elk Relationships On The Northern Yellowstone Winter Range, William J. Barmore Jr.
Aspen Bibliography
No abstract provided.
Cacodylic Acid As A Silvicide, Maurice W. Day
Cacodylic Acid As A Silvicide, Maurice W. Day
Aspen Bibliography
This report deals with the effectiveness of cacodylic acid (dimethylarsenic acid) as a silvicide for undesirable trees. Cacodylic acid has been used successfully as an herbicide for the destruction of grasses and weeds. Experimental work with this material was begun during the 1963 field season, and continued during 1964, to permit complete evaluation of the results. It appears that cacodylic acid has considerable potential as a silvicide.
Swallowtail Butterflies Of Arkansas (Lepidoptera; Family Papilionidae), E. Phil Rouse
Swallowtail Butterflies Of Arkansas (Lepidoptera; Family Papilionidae), E. Phil Rouse
Journal of the Arkansas Academy of Science
No abstract provided.
Habits And Life History Of The Bronze Flea Beetle, Altica Tombacina (Mannerheim) (Coleoptera-Chrysomelidae), Jane C. Dirks-Edmunds
Habits And Life History Of The Bronze Flea Beetle, Altica Tombacina (Mannerheim) (Coleoptera-Chrysomelidae), Jane C. Dirks-Edmunds
Jane Claire Dirks-Edmunds Documents
This article, which was published in volume 39 issue 4 of the journal Northwest Science, describes a study that began in the fall of 1959 and was supported by federal grant G-8779. Dr. Jane Claire Dirks-Edmunds's research focused on the little-known Bronze Beetle and involved several of her contemporaries, both within and outside the Linfield College Biology Department.
An Estimate Of Winter Utilization Of The Cedar Creek Natural History Area By The White-Tailed Deer, L. D. Frenzel Jr.
An Estimate Of Winter Utilization Of The Cedar Creek Natural History Area By The White-Tailed Deer, L. D. Frenzel Jr.
Journal of the Minnesota Academy of Science
Estimates of utilization of the Cedar Creek Natural History Area by the white-toiled deer (Odocoileus virginianus borealis) during the winters of 1963 and 1964 were mode using the deer-drive method. The 1964 estimate is considered the more realistic index of winter utilization by deer of the area because of increased efficiency of the drive, weather conditions favoring deer-drive technics, and agreement with results of pellet-count studies mode independently on the area.
Available Water Supply Of The Las Vegas Ground-Water Basin Nevada, Glenn Thomas Malmberg
Available Water Supply Of The Las Vegas Ground-Water Basin Nevada, Glenn Thomas Malmberg
Publications (WR)
The Las Vegas ground-water basin as described in this report includes the southern part of Indian Spring Valley, Three Lakes Valley, the northern half of Ivanpah Valley, and Las Vegas Valley. These valleys in part are inferred to form a hydrologic unit that includes an area of about 3,000 square miles in the southern part of Clark County, Nev.
The valleys forming the Las Vegas ground-water basin are broad structural depressions surrounded by mountains. The climate of the region is arid, and precipitation in the basin lowlands rarely exceeds 5 inches per year. Drainage is interior except for occasional Hood …
Aspen Snag Yields Record Bitterbrush Seed Cache, Edward R. Schneegas
Aspen Snag Yields Record Bitterbrush Seed Cache, Edward R. Schneegas
Aspen Bibliography
No abstract provided.
The Annual Distribution And Stratification Of Phytoplankton At Aurora Lake, Portage County, Ohio, Harold G. Marshall
The Annual Distribution And Stratification Of Phytoplankton At Aurora Lake, Portage County, Ohio, Harold G. Marshall
Biological Sciences Faculty Publications
A 13-month study of a hard-water lake in northeast Ohio has provided a quantitative and qualitative record of the seasonal changes of the phytoplankton. Maximum production occurred during the summer and winter periods. The summer pulse was dominated by the cyanophyte species: Microcystis aeruginosa, Anabaena spiroides, A. circinalis, and Aphanizomenon flosaquae. The dominants of the winter pulse were the diatoms Fragilaria crotomensis and Asterionella formosa, which formed separate peaks under an ice cover in December and January, respectively. The January development extended into March with the highest concentrations for the year Being reached at approximately …
The Distribution Of Phytoplankton Along A 140 Mile Transect In The Chesapeake Bay, Harold G. Marshall
The Distribution Of Phytoplankton Along A 140 Mile Transect In The Chesapeake Bay, Harold G. Marshall
Biological Sciences Faculty Publications
The composition of phytoplankton progressively changed in the surface samples taken between Norfolk, Virginia and Cambridge, Maryland. These was an inverse relationship between the numbers of phytoplankters and zooplankters in the transect samples. Vertical stratification of the plankton was studied at two 24-hr, stations at the Great Wicomlco and Patuxent Rivers. The vertical centers of zooplankton and phytoplankton populations fluctuated over the study period and evidence is given to support a grazing phenomenon. Large concentrations of nannoplankters were found in all the plankton samples taken and is attributed to the collection procedure using the Van Dorn sampler.
Trinity River Watershed Analysis River/Floods/Weather, Susie Van Kirk
Trinity River Watershed Analysis River/Floods/Weather, Susie Van Kirk
Susie Van Kirk Papers
Newspaper references and analyses concerning the Trinity River from 1861 through 1965.
Note: Exact publication date for report is unknown, definitely published post 1965.
Review Of Echinococcus Species In South Africa, Anna Johanna Maria Verster
Review Of Echinococcus Species In South Africa, Anna Johanna Maria Verster
Harold W. Manter Laboratory of Parasitology: Faculty Publications
1. The nominate subspecies of E. granulosus (Batsch, 1786) is redesignated from the type locality, Europe.
2. Five subspecies of E. granulosus are described from South African carnivores: E. g. granulosus, E. g. africanus, E. g. felidis, E. g. lycaontis and E. g. ortleppi.
3. E. g. granulosus has so far only been recovered from the Transvaal; E. g. ortleppi appears to be restricted to the Transvaal; E. g. africanus occurs in the Orange Free State and the Transvaal; E. g. lycaontis and E. g. felidis like their definitive hosts are restricted to the Transvaal.
4. …
Canada Goose Production And Population Stability, Ogden Bay Waterfowl Management Area, Utah, Norman H. Dey
Canada Goose Production And Population Stability, Ogden Bay Waterfowl Management Area, Utah, Norman H. Dey
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Since the development of Ogden Bay Waterfowl Management Area in 1937, the Canada goose (Branta canadesis moffitti) population increased to a peak in 1949 and then declined slightly. Nelson (1954) noted that the decrease in population was probably due to either a change in habitat or increased hunting pressure. In recent years, direct band returns have indicated a high mortality rate in the population. This project was initiated to determine the relative stability of the Canada goose population and to measure, as closely as possible, the effect of a high mortality rate upon the nesting population.
To estimate …
Weaning Lambs Under Pastoral Conditions, H Suijdendorp, L. Parsons
Weaning Lambs Under Pastoral Conditions, H Suijdendorp, L. Parsons
Journal of the Department of Agriculture, Western Australia, Series 4
IN the summer rainfall region of the pastoral areas lambs are too often born too late to ensure their survival.
In good seasons with a fair measure of winter rain more late lambs will survive, but losses are still serious. The only solution to this problem is to make sure lambs drop in May-June.
But the presence of late and often unmarked lambs at mating time is a disturbing influence, which makes it hard to advance the established mating pattern.
Distribution And Taxonomy Of Mammals Of Nebraska, J. Knox Jones Jr
Distribution And Taxonomy Of Mammals Of Nebraska, J. Knox Jones Jr
Nebraskiana Publications: Resources and Materials on the 37th State
Contents
Introduction
Environment
Climate
Soils
Geology and Physiography
Vegetation
Effects of Man on The Envmonment
Factors Influencing Distribution And Speciation
Wisconsin Glaciation And Post-Wisconsin Climates
Emigration of Recent Mammals To Nebraska
Some Effects of The Environment
The Missouri River as a Barrier to Dispersal
Geographic Varlatlon and Speciation
Mammalian Distributional Areas
Summary
Treatment and Acknowledgments
Checklist (with page references) of Mammals of Nebraska
Accounts of Species
Introduced Mammals
Species of Unverified occurrence
Type Localities
Literature Cited
● Order MARSUPIALIA-Marsupials ● ● Family DIDELPHIDAE-Opossums ● Didelphis marsupialis virginiana Kerr (Opossum) ● Order INSECTIVORA-Insectivores ● Family SORICIDAE-Shrews ● Sorex cinereus haydeni Baird …
One Shot Baiting, C D. Gooding, L. A. Harrison
One Shot Baiting, C D. Gooding, L. A. Harrison
Journal of the Department of Agriculture, Western Australia, Series 4
THE Agriculture Protection Board introduced the first of its contract poisoning schemes in 1955 in the lower South-West when three units undertook the first "1080" poisoning for farmers in Western Australia.
The originators of one-shot baiting describe this new technique and explain how it should be used for best results on the farm.
Attack The Rabbit At Home : Destroy Warrens And Harbourage, J S. Crawford
Attack The Rabbit At Home : Destroy Warrens And Harbourage, J S. Crawford
Journal of the Department of Agriculture, Western Australia, Series 4
Effective rabbit destruction often calls for a carefully worked out control programme consisting of poisoning, fumigating and warren and harbourage destruction.
Possibly the most effective means of not only controlling rabbits but ultimately eradicating them from holdings is the destruction of warrens and harbourage.
The Fox : Status And Control, C D. Gooding
The Fox : Status And Control, C D. Gooding
Journal of the Department of Agriculture, Western Australia, Series 4
NOBODY knows for certain and it is possible that the damage done by foxes is sometimes over-rated, but the fact remains that foxes are reputed to be a real problem to some farmers at lambing time.
Dingo Control : Organised Ground Baiting Drives At Mating Time, C D. Gooding, J. J. Freeth
Dingo Control : Organised Ground Baiting Drives At Mating Time, C D. Gooding, J. J. Freeth
Journal of the Department of Agriculture, Western Australia, Series 4
DINGOES in Western Australia, like all "creatures of nature", have a well defined seasonal pattern of behaviour.
This is influenced somewhat by weather variations, but even in remote areas where violent fluctuations in rainfall occur from year to year, the dingo still breeds at roughly the same time.
The numbers of pups born and the numbers which survive each year varies a lot, but life goes on at roughly the same tempo under most seasonal conditions.
An Assessment Of Cattle Husbandry Problems In Western Australia, W J O Wilkie
An Assessment Of Cattle Husbandry Problems In Western Australia, W J O Wilkie
Journal of the Department of Agriculture, Western Australia, Series 4
THE science of animal husbandry deals with all those things which affect the welfare and productivity of our domestic animals.
The relative emphasis placed on welfare and productivity depends on whether the animals are kept as pets or for profit.
New Species Of Proctophyllodes From Bulgaria (Sarcoptiformes, Analgoidea), Warren T. Atyeo, I. D. Vassilev
New Species Of Proctophyllodes From Bulgaria (Sarcoptiformes, Analgoidea), Warren T. Atyeo, I. D. Vassilev
Bulletin of the University of Nebraska State Museum (1924–2023)
Two new species of feather mites are described: Proctophyllodes tenericaulus from Turdus viscivorus L. (Turdidae) and Galerida cristata (L.) (Alaudidae) and Proctophyllodes emberizae from Emberiza melanocephala Scopoli and E. hortulana (L.) (Fringillidae).
Prodromus Of American Bees Of The Genus Andrena (Hymenoptera, Apoidea), Wallace E. Laberge
Prodromus Of American Bees Of The Genus Andrena (Hymenoptera, Apoidea), Wallace E. Laberge
Bulletin of the University of Nebraska State Museum (1924–2023)
Keys to the females and males and diagnoses of the American subgenera of the genus Andrena are presented in this paper. Previously described subgenera recognized in this work are as follows: Callandrena Cockerell, Scaphandrena Lanham, Plastandrena Hedicke, Parandrena Robertson, Dactylandrena Viereck, Andrena Fabricius, Iomelissa Robertson, Oligandrena Lanham, Hesperandrena Timberlake, Micrandrena Ashmead, Gonandrena Viereck, Opandrena Robertson, Cnemidandrena Hedicke, Simandrena Perez, Thysandrena Lanham, Taeniandrena Hedicke, Ptilandrena Robertson, Trachandrena Robertson, Xanthandrena Lanham, Diandrena Cockerell, Leucandrena Hedicke, Melandrena Perez, Gymnandrena Hedicke, Scoliandrena Lanham, Onagrandrena Linsley and MacSwain. The following five new subgenera are described: Eremandrena, Larandrena, Tylandrena, Geandrena, Chaulandrena.
A Review Of The Mites Of The Family Pseudocheylidae Oudemans, 1909 (Acarina, Prostigmata), Edward W. Baker, Warren T. Atyeo
A Review Of The Mites Of The Family Pseudocheylidae Oudemans, 1909 (Acarina, Prostigmata), Edward W. Baker, Warren T. Atyeo
Bulletin of the University of Nebraska State Museum (1924–2023)
Four genera and ten species are included; these are: Pseudocheylus biscalattts Ber1ese, 1888, P. americanus (Ewing), 1909, Stigmocheylus brevisetus Berlese, 1910, Anoplocheylus europaeus (Berlese), 1910, A. clavatus, n. sp., A. aegypticus, n. sp., A. protea (Womersley), 1935, Neocheylus natalensis Tragardh, 1906, N. nidcolus Lawrence, 1954, and N. collis, n. sp.
Arkansas Avifauna: Some Significant Findings, 1960-1964., Douglas A. James
Arkansas Avifauna: Some Significant Findings, 1960-1964., Douglas A. James
Journal of the Arkansas Academy of Science
No abstract provided.
Problem Of The Hybridization Of The Red Cave Salamander, Eurycea Lucifuga (Raf), And The Long-Tailed Salamander, Eurycea Longicauda Melanopleura (Green), Charles C. Smith
Problem Of The Hybridization Of The Red Cave Salamander, Eurycea Lucifuga (Raf), And The Long-Tailed Salamander, Eurycea Longicauda Melanopleura (Green), Charles C. Smith
Journal of the Arkansas Academy of Science
No abstract provided.
Vermin Control This Month, Department Of Agriculture, Western Australia
Vermin Control This Month, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
THE effects of the very wet winter are no longer being felt in vermin control activities in most of Western Australia and they have returned to normal.
Poison Plant Problems, T E H Aplin
Poison Plant Problems, T E H Aplin
Journal of the Department of Agriculture, Western Australia, Series 4
A POISON plant may be defined as a plant which, when eaten by humans or animals, exerts harmful effects or causes death by virtue of its toxic substances.
The Sparrow, John L. Long
The Sparrow, John L. Long
Journal of the Department of Agriculture, Western Australia, Series 4
SCATTERED widely throughout the world, sparrows are a nuisance wherever they have become established.
Two species have been introduced to Australia—the House sparrow (Passer domesticus) and the Tree sparrow (Passer montanus.)