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Articles 3691 - 3720 of 3773
Full-Text Articles in Population Biology
The Microclimate, Ion And Water Balance Of Larval And Adult Ascaphus Truei Stejneger, Terry L. Mullen
The Microclimate, Ion And Water Balance Of Larval And Adult Ascaphus Truei Stejneger, Terry L. Mullen
All Master's Theses
The purpose of this paper is first to describe the microclimate occupied by larval and adult Ascaphus. This microclimate presents certain osmo- and iono- regulatory problems. The second purpose of this paper is to show how Ascaphus meets these osmo- and iono- regulatory problems.
Planting And Care Of Trees In The Wheatbelt, F Batini
Planting And Care Of Trees In The Wheatbelt, F Batini
Journal of the Department of Agriculture, Western Australia, Series 4
THE climate of South Western Australia includes a long summer drought which subjects trees to considerable moisture stress.
Shade trees and shelter belts can be established successfully in the wheatbelt without hand watering, provided a suitable site and variety of tree is selected and a little time is spent in site preparation and care of the young tree.
This article, which is adapted from a Forests Department publication "Catalogue of Trees for growing under Western Australian conditions", sets out the best varieties of trees and establishment methods.
The Breeding Biology Of The Western Tanager (Piranga Ludoviciana), Gary G. Benson
The Breeding Biology Of The Western Tanager (Piranga Ludoviciana), Gary G. Benson
All Master's Theses
In 1969 a two-year study was undertaken in an effort to enlarge our knowledge of the life history of the western tanager (Piranga ludoviciana). Bent (1958) summarizes the literature on the western tanager, and a review of his work clearly shows an almost total absence of detailed information on the species' life history. To obtain this information, observations were conducted from 1 May through 29 July 1969. A few observations were made during the 1968 breeding season.
Some Biological Aspects Of Lizard Eimerians, With A Description Of Eimeria Poinsettis N. Sp. From Sceloporus Poinsetti, David A, Colwell
Some Biological Aspects Of Lizard Eimerians, With A Description Of Eimeria Poinsettis N. Sp. From Sceloporus Poinsetti, David A, Colwell
All Master's Theses
A previously described eimerian, Eimeria sceloporis, from the northwestern fence lizard, Sceloporus occidentalis occidentalis, was observed for oocyst production, incidence and intensity of infection in both juvenile and adult lizards. In order to test the species specificity of Eimeria ahtanumensis, an attempted transmission was made to Sceloporus poinsetti, Sceloporus jarrovi, Sceloporus undulatus and Sceloporus occidentalis. During the winter of 1970-1971 fecal samples were collected from Sceloporus poinsetti to determine possible coccidial infections. The lizards were collected in September of 1970 in Hidulgo County, New Mexico and the ensuing investigation showed that nine of the thirteen adults were passing an intestinal …
Trap Manifested Behavior Trap Reflected Density Trap Reflected Distribution And Foods Consumed By Raccoons (Procyon Lotor L.) In Two Natural Areas Of Virginia, Elton L. Winslow
Trap Manifested Behavior Trap Reflected Density Trap Reflected Distribution And Foods Consumed By Raccoons (Procyon Lotor L.) In Two Natural Areas Of Virginia, Elton L. Winslow
Biological Sciences Theses & Dissertations
A study was undertaken comparing populations of raccoons (Procyon lotor L.) in two natural areas of Virginia, one in the Piedmont physiographic province at Montpelier and the other in the coastal plain at Newport News. Comparisons were made with respect to differences in: (1) capture and recapture success, (2) relative trap reflected density, (3) trap reflected distribution with respect to aquatic habitat, and (4) in food consumption. Comparison of capture data indicated that capture success per 100 trap nights was much higher at Newport News (1.58) than at Montpelier (.76). However a similar comparison of recapture success per …
Special Report On Animal Overpopulation: Breeding Surplus Dogs And Cats Causes Suffering
Special Report On Animal Overpopulation: Breeding Surplus Dogs And Cats Causes Suffering
Special Reports
Overbreeding has created a surplus of nearly 50 million dogs and cats. These animals are unwanted and homeless. Some of them--the lucky ones--will get a quick, merciful death at humane society shelters. Most, however, haven't even the hope of being reached and protected from suffering in the 3,000 or more communities without humane societies. Instead, they roam the country--starving, thirsting, suffering from disease and injury.
This is suffering on a massive scale. Many factors contribute to it. Commercial interests like pet shops, for example, are partly to blame in suggesting there is money in breeding puppies and kittens. Veterinarians who …
Harvest Mice (Genus Reithrodontomys) Of Nicaragua, J. Knox Jones Jr., Hugh H. Genoways
Harvest Mice (Genus Reithrodontomys) Of Nicaragua, J. Knox Jones Jr., Hugh H. Genoways
University of Nebraska State Museum: Mammalogy Papers
Harvest mice of the genus Reithrodontomys first were reported from Nicaragua by Oldfield Thomas (1907), who originally described Reithrodontomys sumichrasti modestus based on a single specimen from Jinotega. J. A. Allen (1908, 1910) recorded additional specimens of R. s. modestus, which still was the only species known from the country when A. H. Howell (1914) revised the genus Reithrodontomys. In his thorough review of Latin American harvest mice, Hooper (1952) added a second species, Reithrodontomys mexicanus lucifrons, to the Nicaraguan fauna, and Englert (1959) and Anderson and Jones (1960) recorded three additional kinds. The present report treats …
Mating Weaners Does Not Affect Future Ewe Performance, R J. Suiter, K. P. Croker
Mating Weaners Does Not Affect Future Ewe Performance, R J. Suiter, K. P. Croker
Journal of the Department of Agriculture, Western Australia, Series 4
Maiden ewes in Western Australia are usually mated in their second year because of supposed ill-effects of earlier mating on the ewe's future production. Mating at a younger age however, providing there was no reduction in future performance, would provide for an extra lamb drop and thus increase the lifetime output of ewes.
Information from various sources indicated that weaners could be successfully mated providing their bodyweights were satisfactory. This trial was carried out to test the results of mating weaners under Western Australian conditions.
Some Ecological Relations Of Fairy Shrimps In Alkaline Habitats Of Nebraska, D. B. Mccarraher
Some Ecological Relations Of Fairy Shrimps In Alkaline Habitats Of Nebraska, D. B. Mccarraher
Nebraska Game and Parks Commission: Staff Research Publications
Ecological studies on the distribution of fairy shrimps have been made from 246 sites in the sandhills region of Nebraska. New records for Nebraska have been established for Artemia salina, Branchinecta campestris, B. lindahli, B. mackini and Cyzicus mexicanus. Seasonal populations of shrimp have been located in habitats containing permanent fish populations. Water mineralization was the dominant environmental condition related to the distribution of phyllopods with sodium and potassium compounds predominating in the strongly alkaline lakes. Several of the Artemia lakes were classified as hydroxide sites. Many of the alkaline ponds, where B. lindahli and B. campestris flourish, are …
Observation On The Impact Of Certain Insecticides On Spider Populations In A Cotton Field, Peggy Rae Dorris
Observation On The Impact Of Certain Insecticides On Spider Populations In A Cotton Field, Peggy Rae Dorris
Journal of the Arkansas Academy of Science
No abstract provided.
An Annotated Check List Of The Land Mammals Of Curry County, Oregon, Paul Emerson Sherrell
An Annotated Check List Of The Land Mammals Of Curry County, Oregon, Paul Emerson Sherrell
All Master's Theses
Curry County merits study for several reasons. Very little work has been done on its mammalian fauna resulting in a limited number of specimens. In turn there is a sparsity of literature; that written is chiefly concerned with the genera Arborimus and Phenacomys. The location of the county places it in an area of scrambled geological history resulting in a diverse mixture of faunal and floral elements. Logging, agriculture, and grazing activities have altered and continue to alter the natural habitats. These interests have permanently changed both the floristic and faunistic composition of the county.
The aims of this study …
A New Natricine Snake Of The Genus Thamnophis From Northern Mexico, Douglas A. Rossman
A New Natricine Snake Of The Genus Thamnophis From Northern Mexico, Douglas A. Rossman
Occasional Papers of the Museum of Natural Science, Louisiana State University
No abstract provided.
The Taxonomic Status Of Sturnira Bidens (Chiroptera: Phyllostomidae) With Notes On Its Karyotype And Life History, Alfred L. Gardner, John P. O'Neill
The Taxonomic Status Of Sturnira Bidens (Chiroptera: Phyllostomidae) With Notes On Its Karyotype And Life History, Alfred L. Gardner, John P. O'Neill
Occasional Papers of the Museum of Natural Science, Louisiana State University
No abstract provided.
A New Species Of Blackbird (Agelaius) From Peru, Lester L. Short
A New Species Of Blackbird (Agelaius) From Peru, Lester L. Short
Occasional Papers of the Museum of Natural Science, Louisiana State University
No abstract provided.
Distributional Notes On The Birds Of Peru, Including Twelve Species Previously Unreported From The Republic, John P. O'Neill
Distributional Notes On The Birds Of Peru, Including Twelve Species Previously Unreported From The Republic, John P. O'Neill
Occasional Papers of the Museum of Natural Science, Louisiana State University
No abstract provided.
"The Population Explosion And Ecology", Paul R. Ehrlich
"The Population Explosion And Ecology", Paul R. Ehrlich
Special Collections: Oregon Public Speakers
No abstract provided.
Geographic Variation In Dicamptodon Ensatus (Eschscholtz) With Notes On Life History And Zoogeography, Ronald A. Nussbaum
Geographic Variation In Dicamptodon Ensatus (Eschscholtz) With Notes On Life History And Zoogeography, Ronald A. Nussbaum
All Master's Theses
The purpose of this paper is to present information concerning geographic variation between three northern populations of Dicamptodon, and to add to the meager store of information concerning the life history and biology of the species.
A New Natricine Snake Of The Genus Adelophis From Western Mexico, Douglas A. Rossman, Richard M. Blaney
A New Natricine Snake Of The Genus Adelophis From Western Mexico, Douglas A. Rossman, Richard M. Blaney
Occasional Papers of the Museum of Natural Science, Louisiana State University
No abstract provided.
Three Physical Measurements Of Male White-Tailed Deer In West Virginia Correlated With Soil Fertility And Population Density, Charles C. Coffman
Three Physical Measurements Of Male White-Tailed Deer In West Virginia Correlated With Soil Fertility And Population Density, Charles C. Coffman
Theses, Dissertations and Capstones
Differences in the physical size of male white-tailed deer from varying parts of West Virginia were known to exist a considerable number of years before any sophisticated attempts were made to explain them. Prior to 1940, the state's deer herd had been making a slow, but increasingly steady, comeback from a period of extreme scarcity around the turn of the century. To supplement the original remaining stock, shown in Figure 1, page 2, a deer restocking program was initiated in 1923. In 1937, federal legislation, in the form of the Federal Aid to Wildlife Restoration Act, gave added support to …
Studies On The Avifauna Of Burgner Acres, An Upland Stream-Side, Ash-Elm Forest And Its Edge, Kerry Lee Bryan
Studies On The Avifauna Of Burgner Acres, An Upland Stream-Side, Ash-Elm Forest And Its Edge, Kerry Lee Bryan
Masters Theses
No abstract provided.
The Distribution Of Three Taxa Of Peromyscus In Central Washington, Gay Harold Engelsen
The Distribution Of Three Taxa Of Peromyscus In Central Washington, Gay Harold Engelsen
All Master's Theses
One aspect of the study was to define the present ranges of all types of Peromyscus in the study area; the other to determine the extent of interfertility of the groups.
Control Of Weeds In Garden Areas, Geoffrey A. Pearce
Control Of Weeds In Garden Areas, Geoffrey A. Pearce
Journal of the Department of Agriculture, Western Australia, Series 4
THE present-day gardener does not appear to relish the tedious job of removing weeds by hand. It is a never-ending task and no sooner is one germination controlled than another appears.
Modern herbicides provide a ready answer for overcoming the weed problem in the home garden, but it is essential to select the correct chemical and to understand its limitations.
Ninth Random Sample Laying Test, 1965-66, Department Of Agriculture, Western Australia
Ninth Random Sample Laying Test, 1965-66, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
NINTH RANDOM SAMPLE LAYING TEST, 1965-66
POULTRY RESEARCH STATION, WEMBLEY
FINAL REPORT TO 500 DAYS
Tenth Random Sample Laying Test, 1966-67 : Cages, Department Of Agriculture, Western Australia
Tenth Random Sample Laying Test, 1966-67 : Cages, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
TENTH RANDOM SAMPLE LAYING TEST, 1966-67 - CAGES
POULTRY RESEARCH STATION, WEMBLEY
SECOND PROGRESSIVE REPORT TO 26th FEBRUARY, 1967
Average age of birds 215.5 days or 30 weeks and 6 days.
Special Field Days For Merino Breeders, Department Of Agriculture, Western Australia
Special Field Days For Merino Breeders, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
More than 200 Merino stud breeders attended special stud breeding and fertility field days arranged for them by the Department of Agriculture recently.
Breeders attending represented some 40 per cent of the State's Merino studs.
Department Of Agriculture Services : The Botany Branch And The W.A. Herbarium, Department Of Agriculture, Western Australia
Department Of Agriculture Services : The Botany Branch And The W.A. Herbarium, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
ALTHOUGH the flora of Western Australia strongly attracted early botanists and collectors, it was virtually neglected by settlers faced with a century or more of hard pioneering.
Only recently has enthusiasm for our remarkable flora developed within the State and, with the formation of sponsoring societies and the establishment of the Kings Park Botanic Gardens, native species have become popular in home and civic gardens.
Ornamental Trees For The Farm Garden, P Luff
Ornamental Trees For The Farm Garden, P Luff
Journal of the Department of Agriculture, Western Australia, Series 4
THE need for trees in the farm garden is being realized by many people.
Trees around the homestead are required to give such features as shade, colour, fragrance and many other advantages to generally make an area more livable.
Besides these advantages, trees appear to help smaller plants flourish by increasing the humidity and providing various degrees of shade and sunlight.
Poultry Behaviour As It Affects Management, R H. Morris
Poultry Behaviour As It Affects Management, R H. Morris
Journal of the Department of Agriculture, Western Australia, Series 4
UNDER natural conditions animals have considerable control over their movements and over their proximity to each other.
Today, however, there is a trend in animal husbandry towards greater intensificaton, and this is most evident in the poultry industry.
Tenth Random Sample Laying Test, 1966-67 : Litter, Department Of Agriculture, Western Australia
Tenth Random Sample Laying Test, 1966-67 : Litter, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
TENTH RANDOM SAMPLE LAYING TEST, 1966-67 - LITTER
POULTRY RESEARCH STATION, WEMBLEY
SECOND PROGRESSIVE REPORT TO 26th FEBRUARY,1967
Average age of birds 215.5 days or 30 weeks and 6 days.
Geographic Variation In Middle American Parrots Of The Amazona Ochrocephala Complex, Burt L. Monroe Jr., Thomas R. Howell
Geographic Variation In Middle American Parrots Of The Amazona Ochrocephala Complex, Burt L. Monroe Jr., Thomas R. Howell
Occasional Papers of the Museum of Natural Science, Louisiana State University
No abstract provided.