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Β-Lysin, David M. Donaldson Jan 1976

Β-Lysin, David M. Donaldson

BYU Studies

No abstract provided.

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Endangered, Threatened, Extinct, Endemic, And Rare Or Restricted Utah Vascular Plants, Stanley L. Welsh, N. Duane Atwood, James L. Reveal Dec 1975

Endangered, Threatened, Extinct, Endemic, And Rare Or Restricted Utah Vascular Plants, Stanley L. Welsh, N. Duane Atwood, James L. Reveal

Great Basin Naturalist

The status of 382 vascular plant taxa with distribution in Utah is presented. Some 66 species are possibly endangered, 198 threatened, 7 extinct, and 20 extirpated within the state; 4 species have questionable taxonomic status. Included in the list are nearly 225 species of endemic plants, many of which are among the possibly endangered, threatened, and extinct or extirpated plants. Bibliographic citations, type locality, status, and distribution by counties is included for each species or infraspecific taxon. Two new species are described: Psoralea pariensis and Eriogonum natum. One new name, Astragalus barnebyi, is proposed; and one new variety, Eriogonum umbellatum …

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Breeding Range Expansion Of The Starling In Utah, Dwight G. Smith Dec 1975

Breeding Range Expansion Of The Starling In Utah, Dwight G. Smith

Great Basin Naturalist

The discovery and observation of colonies of starlings nesting in the eastern Great Basin desert indicates further expansion of the breeding range of this species in Utah. Data on nest site selection, nesting productivity, food habits, and relationships with other avian species are presented.

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Some Parasites Of Paddlefish (Polyodon Spathula) From The Yellowstone River, Montana, Lawrence L. Lockard, R. Randall Parsons Dec 1975

Some Parasites Of Paddlefish (Polyodon Spathula) From The Yellowstone River, Montana, Lawrence L. Lockard, R. Randall Parsons

Great Basin Naturalist

One species of copepod (Ergasilus elongatus), one trematode (Diclybothrium hamulatum), two nematodes (Camallanus oxycephalus and Contracaecum sp.), and two cestodes (Marsipometra hastata and M. parva) were recovered from 17 paddlefish (Polyodon spathula) collected from the Yellowstone River, Montana, on 11 and 18 May 1973. The male paddlefish averaged 69.4 nematodes and 157.6 cestodes per infected fish while the females averaged 12.0 nematodes and 415.7 cestodes. The higher intensity of cestode infection in female paddlefish was attributed to their larger size and consequent greater intake of food resulting in more exposure to …

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Reproductive Cycle Of The Belding Ground Squirrel (Spermophilus Beldingi Beldingi): Seasonal And Age Differences, Martin L. Morton, John S. Gallup Dec 1975

Reproductive Cycle Of The Belding Ground Squirrel (Spermophilus Beldingi Beldingi): Seasonal And Age Differences, Martin L. Morton, John S. Gallup

Great Basin Naturalist

The reproductive cycle in Belding ground squirrels was studied in the Sierra Nevada Mountains at two locations, one at 2,100 m elevation, the other at 3,000 m. Adults emerged from hibernation completely prepared physiologically for reproduction. Males tended to emerge slightly ahead of females and yearlings tended to emerge later than adults. Yearling females were fertile but produced smaller litters than adults, 4.48 vs. 6.31. Yearling males were infertile. They exhibited a slight seasonal cycle in testicular growth but did not reach sexual maturity. Testicular growth and spermatogenesis were incipient in many adults and in yearlings prior to hibernation.

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Full Issue, Vol. 35 No. 4 Dec 1975

Full Issue, Vol. 35 No. 4

Great Basin Naturalist

No abstract provided.

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The Zygoptera (Odonata) Of Utah With Notes On Their Biology, A. V. Provonsha Dec 1975

The Zygoptera (Odonata) Of Utah With Notes On Their Biology, A. V. Provonsha

Great Basin Naturalist

Detailed distribution maps of Utah are provided for each of the 33 state species of Zygoptera. Notes on the general range, habitat preference, reproductive behavior, emergence data, and general biology of each species are also included.

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Correlates Of Burrow Location In Beechey Ground Squirrels, Donald H. Owings, Mark Borchert Dec 1975

Correlates Of Burrow Location In Beechey Ground Squirrels, Donald H. Owings, Mark Borchert

Great Basin Naturalist

Partial correlation analysis indicates that Beechey ground squirrels show a strong preference for digging burrows under and around large objects, may show a weaker tendency to locate their burrows under the cover of tree canopies, and avoid digging burrows in areas with both treecanopy and ground cover (stones, logs). These relationships hold for large but not small burrow systems. The need for unobstructed visual surveillance and an autumn food supply are proposed to be determinants of these preferences.

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Sexual Dimorphism In Malpighian Tubules Of Pteronarcys Californica Newport (Plecoptera), Ralph R. Hathaway Dec 1975

Sexual Dimorphism In Malpighian Tubules Of Pteronarcys Californica Newport (Plecoptera), Ralph R. Hathaway

Great Basin Naturalist

The Malpighian tubules in female nymphs and adults of Pteronarcys californica Newport are larger and whiter than in males. This difference is detectable in nymphs as small as 300 mg in live weight (final instar nymphs weigh 800 to 1600 mg depending on sex), and is most pronounced in late nymphs and adults. These differences are thought to be related to the increased excretory load imposed by the synthesis of ooplasm in the late female nymph and adult.

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Front Matter, Vol. 35 No. 4 Dec 1975

Front Matter, Vol. 35 No. 4

Great Basin Naturalist

No abstract provided.

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New Synonymy And New Species Of American Bark Beetles (Coleoptera: Scolytidae), Part Ii, Stephen L. Wood Dec 1975

New Synonymy And New Species Of American Bark Beetles (Coleoptera: Scolytidae), Part Ii, Stephen L. Wood

Great Basin Naturalist

New synonymy is proposed as follows: Pityophthorus Eichhoff ( = Gnathophorus Schedl, Gnathophthorus Wood), Araptus confinis (Blandford) ( = Neopityophthorus glabricollis Schedl), A. eruditus (Schedl) ( = Neodryocoetes buscki Blackman), A. hymenaeae (Eggers) ( = Neodryocoetes humilis Blackman), A. schedli (Blackman) ( = Neodryocoetes lenis Blackman), A. tenellus (Schedl) ( = Ctenyophthorus mexicanus Schedl, Neodryocoetes granulatus Schedl, Araptus cuspidus Wood), Coccotrypes carpophagus (Hornung) ( = Coccotrypes liberiensis Hopkins, Coccotrypes punctatulus Eggers), C. dactyliperda (Fabricius) ( = Coccotrypes bassiavorus Hopkins), C. robustus Eichhoff ( = Coccotrypes cylindricus Schedl), Cryptocarenus heveae (Hagedorn) ( = Cryptocarenus caraibicus Eggers), Hypothenemus setosus (Eichhoff) ( = …

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Index [And Table Of Contents] To Volume 35 Dec 1975

Index [And Table Of Contents] To Volume 35

Great Basin Naturalist

No abstract provided.

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End Matter, Vol. 35 No. 4 Dec 1975

End Matter, Vol. 35 No. 4

Great Basin Naturalist

No abstract provided.

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Some Relationships Between Internal Parasites And Brown Trout From Montana Streams, Lawrence L. Lockard, R. Randall Parsons, Barry M. Schaplow Dec 1975

Some Relationships Between Internal Parasites And Brown Trout From Montana Streams, Lawrence L. Lockard, R. Randall Parsons, Barry M. Schaplow

Great Basin Naturalist

Forty-five percent of 306 brown trout from 16 Montana streams were infected with one or more of the nematodes Cystidicoloides salvelini, Bulbodacnitis globosa, Rhabdochona sp., and Eustrongylides sp. The relationships between incidence and intensity of nematode infections and age and sexual maturity of the host fish were studied. Generally, sexually mature female brown trout had a higher rate of infection and had more nematodes per infected fish than immature female brown trout. Higher incidence and intensity of infection in sexually mature fish was attributed to more aggressive feeding behavior leading to more exposure to the intermediate hosts (mayflies) of the …

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Efficacy Of Bunamidine Hydrochloride Against Immature And Mature Stages Of Echinococcus Granulosus, Lauritz A. Jensen Dec 1975

Efficacy Of Bunamidine Hydrochloride Against Immature And Mature Stages Of Echinococcus Granulosus, Lauritz A. Jensen

Theses and Dissertations

A study was conducted to determine the efficacy of bunamidine hydrochloride against the immature and mature stages of Echinococcus granulosus found in Utah. Twenty-seven dogs were obtained from local animal shelters and experimentally infected with the parasite. The drug was given at dosage levels of 25 mg/kg to 50 mg/kg of bodyweight. It was from 85.9 to 98.8% effective against the immature stage, and 100% effective against the adult stage. The results suggest that this drug can feasibly be used under field conditions where hydatid disease is endemic.

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Studies Of N⁵, N¹⁰-Methylene Tetrahydrofolate Reductase From Porcine Kidney And Mouse L1210-Induced Tumor Tissues, Purification And Interaction With Antifolates, David W. Jayme Dec 1975

Studies Of N⁵, N¹⁰-Methylene Tetrahydrofolate Reductase From Porcine Kidney And Mouse L1210-Induced Tumor Tissues, Purification And Interaction With Antifolates, David W. Jayme

Theses and Dissertations

Methylene tetrahydrofolate reductase has been purified 1000-fold from porcine kidney and 400-fold from mouse L1210-induced tumor tissue by classical methods. The enzyme preparations have been demonstrated to be essentially free of contaminating methionine synthetase and serine transhydroxymethylase activity. Studies of the kinetic properties of the kidney and tumor enzymes, with respect to the reverse reaction using N5-methyl tetrahydrofolate as the variable substrate, have indicated Km values of 2.0 and 2.4 x 10-4 M, respectively. Inhibition of this key branch point enzyme in folate metabolism by a number of antimetabolites indicates that several of these antifolate compounds exhibit enzyme inhibition superior …

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Front Matter, Vol. 20 No. 2 Oct 1975

Front Matter, Vol. 20 No. 2

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

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End Matter, Vol. 20 No. 2 Oct 1975

End Matter, Vol. 20 No. 2

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

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Systematics Of Neotropical Hirstionyssus Mites With Special Emphasis With Special Emphasis On Venezuela (Acarina: Mesostigmata), C. Selby Herrin, Conrad E. Yunker Oct 1975

Systematics Of Neotropical Hirstionyssus Mites With Special Emphasis With Special Emphasis On Venezuela (Acarina: Mesostigmata), C. Selby Herrin, Conrad E. Yunker

Brigham Young University Science Bulletin, Biological Series

This paper presents the results of a systematic study of mites of the genus Hirstionyssus Fonseca collected from mammals, primarily in Venezuela, but including one collection each from Colombia, Nicaragua, and British Honduras. Previously described species from Panamá and Brazil are reviewed and new distributional records are listed. The known Neotropical fauna of Hirstionyssus mites includes 15 species, 7 of which are described here as new: H. proctolatus n. sp.; H. brachysternum n. sp.; H. dorsolatus n. sp.; H. rhipidomys n. sp.; H, venezuelensis n. sp.; H. brevicalcar n. sp.; and H. parvisoma n. sp. The previously unknown male and …

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Venezuelan Macronyssidae (Acarina: Mesostigmata), Robert C. Saunders Oct 1975

Venezuelan Macronyssidae (Acarina: Mesostigmata), Robert C. Saunders

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

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Spinturnicid Mites Of Venezuela (Acarina: Spinturnicidae), C. Selby Herrin, Vernon J. Tipton Oct 1975

Spinturnicid Mites Of Venezuela (Acarina: Spinturnicidae), C. Selby Herrin, Vernon J. Tipton

Brigham Young University Science Bulletin, Biological Series

The results of an extensive survey of spinturnicid mites of bats from Venezuela are presented in this paper. Approximately 30,000 bats were collected from a wide variety of life zones and localities. A representative sample was searched for ectoparasites. There are 3 genera of the family Spinturnicidae in Venezuela: Cameronieta, Periglischrus, and Spinturnix. Three previously described species of Cameronieta were found in the Venezuelan collection. Of the 7 species of Spinturnix previously described from the New World, 4 are reported from Venezuela. The genus Periglischrus constitutes by far the most significant segment of the Venezuelan collection. It is represented by …

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End Matter, Vol. 35 No. 3 Sep 1975

End Matter, Vol. 35 No. 3

Great Basin Naturalist

No abstract provided.

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Body Size, Organ Size, And Sex Ratios In Adult And Yearling Belding Ground Squirrels, Martin L. Morton, Robert J. Parmer Sep 1975

Body Size, Organ Size, And Sex Ratios In Adult And Yearling Belding Ground Squirrels, Martin L. Morton, Robert J. Parmer

Great Basin Naturalist

A five-year study of Belding ground squirrels was conducted at high altitude in the Sierra Nevada. Body weight and body length varied seasonally depending upon the fat depletion-deposition cycle, age, and sex. Adult males tended to be heavier and longer than adult females, particularly in the last half of the active season. A similar pattern was present in yearlings. Yearling squirrels were often distinguishable from adults on the basis of body size. Mean body weights were greater in adults throughout the season, and mean body lengths were greater in adults through the first half of the season. Adults also had …

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Front Matter, Vol. 35 No. 3 Sep 1975

Front Matter, Vol. 35 No. 3

Great Basin Naturalist

No abstract provided.

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Distribution And Abundance Of The Black-Billed Magpie (Pica Pica) In North America, Carl E. Bock, Larry W. Lepthien Sep 1975

Distribution And Abundance Of The Black-Billed Magpie (Pica Pica) In North America, Carl E. Bock, Larry W. Lepthien

Great Basin Naturalist

Analysis of Audubon Society Christmas bird count data and certain environmental variables shows the degree to which the Black-billed Magpie is a bird of cool arid regions in North America. The abundance and distribution of this species appear to be limited by two major climatic barriers: increasing summer temperatures in the Southwest and increasing summer humidity and precipitation on the central plains.

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Urosaurus And Its Phylogenetic Relationship To Uta As Determined By Osteology And Myology (Reptilia: Iguanidae), Charles Fanghella, David F. Avery, Wilmer W. Tanner Sep 1975

Urosaurus And Its Phylogenetic Relationship To Uta As Determined By Osteology And Myology (Reptilia: Iguanidae), Charles Fanghella, David F. Avery, Wilmer W. Tanner

Great Basin Naturalist

The status of the genus Urosaurus Hallowell and its relationship to the genus Uta Baird and Girard as presented in previous studies are reviewed. Additional data from the head and throat osteology and myology are included in the analysis. Each bone and muscle is measured, ratios determined, and the position noted. Five distinct anatomical differences are noted between Uta and Urosaurus, and it is concluded that both of these genera are sufficiently different to warrant generic status. Uta is considered to be phylogenetically more primitive.

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End Matter, Vol. 20 No. 3 Sep 1975

End Matter, Vol. 20 No. 3

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

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Mallophaga Of Venezuelan Mammals, K. C. Emerson, Roger D. Price Sep 1975

Mallophaga Of Venezuelan Mammals, K. C. Emerson, Roger D. Price

Brigham Young University Science Bulletin, Biological Series

Seven species of Mallophaga have been previously reported from Venezuelan mammals. In this paper an additional 28 species and subspecies, 7 of which are new, are reported from Venezuela; and 21 other species which have not been previously reported from Venezuela are included because their hosts are found there.

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Front Matter, Vol. 20 No. 3 Sep 1975

Front Matter, Vol. 20 No. 3

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

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The Effect Of Altitude On Thyroid Function Of The Uinta Ground Squirrel (Citellus Armatus), Wendell Lee Wells Aug 1975

The Effect Of Altitude On Thyroid Function Of The Uinta Ground Squirrel (Citellus Armatus), Wendell Lee Wells

Theses and Dissertations

Thyroid uptake and distribution of 125I, concentrations of T4 and T3 in serum and thyroids and concentrations of TSH in serum and pituitaries were measured to determine thyroid function of Uinta Ground Squirrels (Citellus armatus) native to 5,400 and 9,000 feet elevations to evaluate alterations in the state of the thyroid due to increased altitude. Uptake of 125I was 60 percent lower by squirrels from 9,000 feet. Incorporation of 125I into T3 was greater at the higher elevation, but absolute thyroid T3 concentrations were similar at both elevations. No significant differences were found in serum T3 concentrations, but squirrels living …

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