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Articles 33211 - 33240 of 36389
Full-Text Articles in Entire DC Network
A New Species Of Spiny Pocket Mouse (Genus Liomys) From Jalisco, Mexico, Hugh H. Genoways
A New Species Of Spiny Pocket Mouse (Genus Liomys) From Jalisco, Mexico, Hugh H. Genoways
University of Nebraska State Museum: Mammalogy Papers
In the course of a systematic revision of the spiny pocket mice of the genus Liomys, a series of large, brightly colored mice from several localities in southeastern Jalisco was studied. Individuals in this series appeared to be morphologically distinct from mice typical of Liomys pictus plantinarensis Merriam. 1902, taken in the same traplines at several localities, and from specimens of Liomys irroratus jaliscensis (J. A. Allen, 1906), a taxon that also occurs in southeastern Jalisco. The current studies now have progressed to the point where the large and distinctively colored mice from Jalisco can be defined as a …
Field Trip Data Useful Guide Of Trends In Avian Population, Jessie Maye Smith
Field Trip Data Useful Guide Of Trends In Avian Population, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
Marine Resource Information Bulletin, Vol. 3, No. 9, Virginia Sea Grant, Virginia Institute Of Marine Science
Marine Resource Information Bulletin, Vol. 3, No. 9, Virginia Sea Grant, Virginia Institute Of Marine Science
Books
- Extension agent joins VIMS staff
Nest Built By Herons Near People, Jessie Maye Smith
Nest Built By Herons Near People, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
Marine Resource Information Bulletin, Vol. 3, No. 11, Virginia Sea Grant, Virginia Institute Of Marine Science
Marine Resource Information Bulletin, Vol. 3, No. 11, Virginia Sea Grant, Virginia Institute Of Marine Science
Books
- Weekly oyster spatfall on shellstrings June1971
- Scientists study methods of increasing soft blue crab production
The Myology Of Sceloporus C. Clarki Baird And Girard (Reptilia: Iguanidae), Diane Marie Secoy
The Myology Of Sceloporus C. Clarki Baird And Girard (Reptilia: Iguanidae), Diane Marie Secoy
Brigham Young University Science Bulletin, Biological Series
Examination of the complete musculature of Sceloporus clarki clarki Baird and Girard and seven other species of Sceloporus revealed variation among species of Sceloporus and between Sceloporus and other iguanid lizards. The muscles in which the greatest variation was found were the intermandibularis group, the constrictor colli, the episterno-cleido-mastoideus, the episternohyoideus, the coracoid head of the triceps, the costocoracoid and the flexor tibialis externus. This study indicates: (1) Sceloporus is more closely allied to Crotaphytus than to the ground-dwelling iguanines; (2) the possibility of the basal stock of Sceloporus being arboreal, and (3) Sceloporus is a genus in the process …
Whole Issue Nebraska Bird Review (June 1971) 39(2)
Whole Issue Nebraska Bird Review (June 1971) 39(2)
Nebraska Bird Review
Table of Contents
Turkey Vulture Nesting Records for Nebraska - A New Record for Sheridan County ................19
A Lancaster County Record for the Surf Scoter ................21
1970 (Thirteenth) Fall Occurrence Report................22
The Seventieth Annual Meeting................ 36
Notes ................37
Book Review ................40
Evaporative Water Loss In Two Northwest Snakes: Pituophis Catenifer And Crotalus Viridis, Donald R. Woolery
Evaporative Water Loss In Two Northwest Snakes: Pituophis Catenifer And Crotalus Viridis, Donald R. Woolery
All Master's Theses
A study by Gans, Krakauer and Paganelli (1968) dealt with twenty-six species of snakes representing five families. They found that the "rate of water loss was proportional to surface area" and that water loss correlates with the aridity of the selected habitat. No comparative information resulting from the direct separation of the pulmonary and cutaneous avenues of water loss is currently available. Also, no direct comparisons of this separation in sympatric species are available. These comparisons are the basis for this study.
End Matter, Vol. 14 No. 1
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Front Matter, Vol. 14 No. 1
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Watching The Birdwatchers Can Also Be Interesting Hobby, Jessie Maye Smith
Watching The Birdwatchers Can Also Be Interesting Hobby, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
Systematics Of Southern Banner-Tailed Kangaroo Rats Of The Dipodomys Phillipsii Group, Hugh H. Genoways, J. Knox Jones Jr.
Systematics Of Southern Banner-Tailed Kangaroo Rats Of The Dipodomys Phillipsii Group, Hugh H. Genoways, J. Knox Jones Jr.
University of Nebraska State Museum: Mammalogy Papers
Both nongeographic and geographic variation was assessed in southern banner-tailed kangaroo rats of the nominal species Dipodomys phillipsii and D. ornatus . Univariate and multivariate analyses were employed in consideration of geographic variation. D. ornatus is arranged as a subspecies of D. phillipsii, in which four races (phillipsii, ornatus, perotensis, and oaxacae) are recognized. Some observations on natural history also are included.
Marine Resource Information Bulletin, Vol. 3, No. 8, Virginia Sea Grant, Virginia Institute Of Marine Science
Marine Resource Information Bulletin, Vol. 3, No. 8, Virginia Sea Grant, Virginia Institute Of Marine Science
Books
- Extensive oyster kill in upper James River unlikely
- Oyster meats quality index
- Certified crab meat plants in Maryland
- 1971 crab catch prediction
Sanctuary Sign Honor To Water-Control District Boss, Jessie Maye Smith
Sanctuary Sign Honor To Water-Control District Boss, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
Watchers Glimpse 145 Species During 7th Spring Bird Count, Jessie Maye Smith
Watchers Glimpse 145 Species During 7th Spring Bird Count, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
The Valley Land Of Unique Flora And Fauna, Jessie Maye Smith
The Valley Land Of Unique Flora And Fauna, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
Workaday World Stops Short At Baltimore Oriole S Whistle, Jessie Maye Smith
Workaday World Stops Short At Baltimore Oriole S Whistle, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
An Analysis Of Cattle Grazing On Steep Slopes, William Wayne Patton
An Analysis Of Cattle Grazing On Steep Slopes, William Wayne Patton
Theses and Dissertations
A field study was made to correlate cattle grazing patterns of steep terrain with the rest-rotation grazing system. Line-plot transects were positioned across each of three heavily grazed, steep canyons. The rest-rotation system as practiced on the Gooding Cattle Allotment is resulting in good forage use as the animals are grazing forage on slopes up to 60%. Level contour trails extending across slope faces made it possible for cattle to graze on steep slopes at distances up to 80 chains from water. Contour trails originate at watering loctions; hence better distribution of water could be expected to result in better …
Warbler Not Hiding Its Nashville Sound, Jessie Maye Smith
Warbler Not Hiding Its Nashville Sound, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
Kentucky Warbler (Vol. 47, No. 2), Kentucky Library Research Collections
Kentucky Warbler (Vol. 47, No. 2), Kentucky Library Research Collections
The Kentucky Warbler
No abstract provided.
Systematic And Evolutionary Implications Of Parthenogenesis In The Hymenoptera, C. N. Slobodchikoff, Howell V. Daly
Systematic And Evolutionary Implications Of Parthenogenesis In The Hymenoptera, C. N. Slobodchikoff, Howell V. Daly
Entomology Collection
Two types of parthenogenesis, arrhenotoky and thelytoky, exist in the Hymenoptera. Arrhenotoky, the development of males from unfertilized eggs, is present in all wasps and bees. Thelytoky, the development of diploid females from unfertilized eggs, is present in a few species. Two types of thelytoky, apomixis and automixis, are known. Most thelytokous Hymenoptera are automictic. No meiosis, only mitosis, occurs in apomixis. Meiosis does occur in automixis, allowing crossing-over and segregation of genes. Advantages of thelytoky are that heterotic combinations become fixed, gene loss is reduced, and reproduction requires only a single individual. One advantage of arrhenotoky is that genetic …
The Hyobranchium And Throat Myology Of The Ambystomidae Of The United States, John E. Krogh
The Hyobranchium And Throat Myology Of The Ambystomidae Of The United States, John E. Krogh
Theses and Dissertations
The 16 species and subspecies of the Ambystomidae of the United States are placed into six groups according to their throat morphology as follows: The Dicamptodon group, the Rhyacotriton group, the A. annulatum-A. cingulatum group, the A. gracile-A. jeffersonianum-A. mabeei-A. macrodactylum-A. maculatum group, the A. talpoideum group, the A. opacum-A. texanum group, and the A. rosaceum-A. t. tigrinum-A. t. melanostictum-A. t. nebulosum group. Dicamptodon appears to be the most primitive group and Rhyacotriton the most specialized. Based on the morphology of the throat region it is suggested that A. rosaceum be placed in the tiger salamander group as a subspecies …
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.
Freshwater Food Habits Of Salvelinus Malma (Walbaum) On Amchitka Island, Alaska, John F. Palmisano
Freshwater Food Habits Of Salvelinus Malma (Walbaum) On Amchitka Island, Alaska, John F. Palmisano
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Stomach contents of 3,672 Dolly Varden char collected from September 1967 to November 1968 were examined to determine the food habits of this species. Of these, 3,100 (86%) had food in their stomachs. Aquatic invertebrates (Insecta and Crustacea) comprised over 90% of the diet. Food habits varied with habitat. Aquatic insects were most important in the diet of stream fish while aquatic insects and crustaceans were most important in the diet of lake fish. Food habits of lake fish were re- 1ated to lake bottom type and access to the sea. Fish in landlocked lakes fed primarily on aquatic insects, …
Spawning And Early Life History Of Largemouth Bass (Micropterus Salmoides) In Wahweap Bay, Lake Powell, Kent D. Miller
Spawning And Early Life History Of Largemouth Bass (Micropterus Salmoides) In Wahweap Bay, Lake Powell, Kent D. Miller
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Spawning time and habitat of largemouth bass, survival of embryos, and growth and food habits of fingerlings were studied in 1968 and 1969 at Wahweap Bay, Lake Powell. Spawning began in mid- to late-April, when mean daily water temperature at nesting depths was 14.4-15.0 Centigrade (58-59 Fahreheit), and continued until mid-June. Most spawning took place on the northeast shore of the bay. Sandstone rubble was the most commonly used bottom type for nesting, either at the base of ledges or around large sandstone boulders. Mean nest depth increased from 1.63 meter to 4.54 meters (5.36 feet to 14.90 feet) in …
Carrying Capacity Of The Key Browse Species For Moose On The North Slopes Of The Uinta Mountains, Utah, David E. Wilson
Carrying Capacity Of The Key Browse Species For Moose On The North Slopes Of The Uinta Mountains, Utah, David E. Wilson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The Shiras moose, Alces alces shirasi, and its winter habitat on the north slopes of the Uinta Mountains in Utah were studied from August, 1969, to July, 1971 to determine the food requirement for moose, the key browse species during the winter months, the acreage, density and utilization of the key browse species, and their carrying capacity for moose.
It was determined that an average adult moose had a daily food requirement of 19,133 kilocalories. The key browse species for moose were Salix drummondiana and S. geyeriana. These two species accounted for 92.0 and 4.7 percent respectively of …
An Evaluation Of A Self-Guided Visitor Tour At Bear River Migratory Bird Refuge, Steven J. Kohler
An Evaluation Of A Self-Guided Visitor Tour At Bear River Migratory Bird Refuge, Steven J. Kohler
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
In 1967 this study was initiated to evaluate the self-guided visitor tour of Bear River Migratory Bird Refuge. A 20 page visitor information booklet and tour guide was prepared and published for distribution at the refuge, and its effectiveness in telling the refuge story was evaluated. To gain a measure of the self-guided tour in terms of quality, visitor use patterns and satisfactions were critically examined.
To gather data on visitor use of the refuge, the visiting public was directly sampled by three methods: mail questionnaires, on-site interviews and candid tower observations of groups on the tour.
The information and …
A Study Of The Biology Of The Species Of Protocalliphora In The Northern Wasatch Range, Terry L. Whitworth
A Study Of The Biology Of The Species Of Protocalliphora In The Northern Wasatch Range, Terry L. Whitworth
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
A total of 733 bird nests, representing 55 species from 23 habitats, was examined. Forty-nine percent of the nests of 39 bird species were infested with 16 species of Protocalliphora.
Infestation of bird nests by Protocalliphora is believed to be related to a number of factors, which are discussed. Loosely constructed nests, nests heavily saturated with feces, and nests occupied early in the season had low rates of infestation. Nests of colonial birds were more frequently infested than those of solitary birds. Nests of some birds were rarely or never infested.
Sixteen species of Protocalliphora are differentiated and their …
Water In Relation To The Establishment Of Chukar Partridge In Utah Deserts, James R. Messerli
Water In Relation To The Establishment Of Chukar Partridge In Utah Deserts, James R. Messerli
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The effects artificial watering devices (guzzlers) have on chukar (Alectoris graeca) populations were studied in Juab County, Utah.
The effect of water was determined by a comparision of chukar populations near guzzlers with water to guzzlers without water. The closure of two guzzlers had a pronounced effect on the distribution of chukars and the number of chukars decreased significantly at the two guzzlers after their closure.
Water concentrated the chukars, therefore, influencing their activities. During the water-critical period, between 1 July and 1 October, frequent, possibly daily, trips were made to water by chukars.
Reproduction and chick survival …
An Electrophysiological Study Of The Oral Plate Sensory Organs Of The Honey Bee (Apis Mellifera L.), Rodney R. Seeley
An Electrophysiological Study Of The Oral Plate Sensory Organs Of The Honey Bee (Apis Mellifera L.), Rodney R. Seeley
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The oral plate sense organs of the honey bee, Apis mellifera L., have been investigated employing an electrophysiological technique which allows simultaneous stimulation and recording.
The results of the study present evidence that the four bipolar sense cells innervating the sensory papillae on the oral surface of the hypopharynx are chemoreceptors. The sensory papillae respond to cations, glucose, water, and amino acids. Evidence for the absence of a mechanosensory cell is presented. The data concerning the sensory structures agree with the current theories of chemoreception.