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Studies On The Biology And Ecology Of The Northern Scorpion, Paruroctonus Boreus (Girard), Gregory Ira Tourtlotte

Great Basin Naturalist

An investigation to elucidate some facets of the biology and ecology of Paruroctonus boreus (Girard), in southeast Idaho, was conducted from 21 March to 13 October 1972. Three hundred and eighty-five observations were made on 202 scorpions captured in covered pitfalls and by ultraviolet light.

The greatest activity occurred at 2130 hours. Surface activity was not observed when ambient temperature was below 10 C, and, as ambient temperature increased, an increase in surface activity was noted. Male scorpions frequently moved as much as 30 m between observations, while females seldom moved more than five m.

Sex ratios varied considerably depending …

Notes On Viscainopelmatus Davewerneri (Orthoptera: Gryllacrididae; Stenopelmatinae) From The Viscaino Desert, Baja California Sur, Mexico, Ernest R. Tinkham, Clark R. Mahrdt, Benjamin H. Banta

Great Basin Naturalist

A male nymph in stadium 3 of Viscainopelmatus davewerneri Tinkham is reported and illustrated. The specimen was taken near Laguna Scammon, Baja California Sur, Mexico.

Front Matter, Vol. 34 No. 3

Great Basin Naturalist

No abstract provided.

A Summary Of Biological Investigations Concerning The Great Salt Lake, Utah (1861–1973), Doyle W. Stephens

Great Basin Naturalist

The early stages in the history of biological investigation of the Great Salt Lake involved the identification and establishment of taxonomic relationships of the indigenous flora and fauna. A result of advancements in systematic biology is that many of the earlier names of organisms have been placed in synonomy. Recent interest in the lake has centered on biological productivity and interactions of components of the ecosystem. The creation of two ecologically distinct lakes by the construction of a railroad causeway has further enhanced the biological complexity of what was originally believed to be a lifeless body of brine.

End Matter, Vol. 34 No. 3

Great Basin Naturalist

No abstract provided.

A New Variety Of Penstemon Thurberi (Scrophulariaceae), James L. Reveal, Janice C. Beatley

Great Basin Naturalist

No abstract provided.

A New Sceloporine Lizard From Oaxaca, Mexico, Marlene M. Dasmann, Hobart M. Smith

Great Basin Naturalist

Sceloporus megalepidurus halli, subsp. nov., is described from San José Lachiguiri, Oaxaca, Mexico, from one adult male.

The Population Dynamics Of Tanypus Stellatus Coquillett (Diptera: Chironomidae) In Goshen Bay Of Utah Lake, Dennis Kenji Shiozawa

Theses and Dissertations

The population dynamics of Tanypus stellatus in Goshen Bay of Utah Lake was investigated from July 18, 1973, to August 5, 1974. Samples were collected from three stations with an Ekman grab and a K-B corer. The samples were washed in a 110 micron nitex screen and then floated in a sucrose solution. The K-B core was used to determine the vertical distribution of Tanypus stellatus. Ninety-six percent of the Tanypus stellatus larvae are located in the top five centimeters; 99 percent are less than ten centimeters deep. The Ekman grab was used to study the population dynamics of the …

Biology Of Northern Bald Eagles (Haliaeetus Leucocephalus Alascanus) On Amchitka Island, Alaska, Steven K. Sherrod

Theses and Dissertations

Bald Eagles on Amchitka Island, Alaska, were studied from 1969-1972. From 1970-1972 the population averaged 214.6 eagles. The average ration was 66% adults to 34% subadults. The eagles move to and from the island in relation to significant food sources (especially the garbage dump). An increase in active nests occurred from 1969-1972 due to an increase in food. The average percentage of nests containing young from 1970-1972 was 71.28%. During these three years, the average number of young known in a nest per nesting attempt was 1.24, and the average number of young known in a nest per nest containing …

The Spatial Distribution Of The Nests Of The Black-Crowned Night Heron (Nycticorax Nycticorax) And The Snowy Egret (Leucophoyx Thula) In Central Utah, Randall S. Isham

Theses and Dissertations

Nests of the Black-crowned Night Heron and the Snowy Egret were examined in five central Utah colonies in 1973 to determine the spatial distribution within the colony. Nest locations of the 1085 nests of the two species were plotted to the nearest foot with an alidade and plane table. Tests of randomness, clump size, association, segregation, and T distribution were utilized. No differences between species were noted for the distance to the nearest and the next nearest nest. The Night Heron nested closer to other Night Herons and more often than did the Snowy Egret which non-significantly selected either species …

Absorption Of Caffeine Through Isolated Rat Small Intestine, William James Hatch

Theses and Dissertations

Intestines of fifty-six albino rats of the Holtzman strain were removed and perfused with Krebs bicarbonate buffered solutions containing caffeine. After one hour of absorbtion, caffeine was extracted from the serosal fluids in chloroform and concentrations were determined spectrophotometrically. It was found that all portions of the small intestine transported caffeine against a concentration gradient. This transport mechanism demonstrated saturation kinetics and was inhibited by ouabain. It was concluded that the movement of caffeine from the mucosa to the serosa of the small intestine cannot be the result of simple diffusion. Possible mechanisms by which the absorption of caffeine takes …

Biological Studies On Cryptobia Atraria Sp.N. (Kinetoplastida: Cryptobiidae) In Fishes From The Sevier River Drainage, Utah, J. Stephen Cranney

Theses and Dissertations

Fish culture for both food and sport utilization has been greatly increasing throughout the world. The editor of Fish Farming Industries (1973) predicted an increase by 1977 in the United States of 83% for catfish producers, 49% for trout farmers, and 91% for bait dealers. Concomitant with the renewed interest in fish culture has been a corresponding need to further understand fish diseases.

Metabolism Of 3-Isopropyl-4h-2,1,3-Benzothiadiazin-4-(3h)-One-2,2-Dioxide (Bentazon) In Agitated And Non-Agitated Sediment, David Cortez Gutierrez

Theses and Dissertations

Bentazon, (3-isopropyl-1H-2,1,3-benzothiadiazin-4(3H)-l-2,2-dioxide) a new experimental herbicide, was studied under the effects of sterile and non-sterile conditions, 12 hours light: 12 hours dark and totally dark conditions, and agitated and non-agitated conditions in aquatic sediment. The effects of the different levels of BOD/COD values on the decomposition of Bentazon were studied. Photoperiod, sterility, and BOD/COD levels appeared to have no influence in the breakdown of Bentazon. Agitation-time interaction appeared to be the only factor that influenced the more rapid degradation of Bentazon. Bentazon was the major 14C-residue found in the water; it was followed by an unknown. The third major metabolite …

The Attack Of Hard And Soft Nucleophiles On 6-Methylsulfonyl-, 6-Methylsulfinyl-, And 6-Methylthioaminopteridines, William David Johnston

Theses and Dissertations

In an attempt to prepare 6-anilino and 6-benzylaminopteridines, 2,4,7-triamino-6-methylsulfonyl and 2,4,7-triamino-6-methylsulfinylpteridines were prepared and reacted with a number of benzylamines and aniline. These hard nucleophiles gave amine exchange products with no displacement at the 6 position. Aliphatic amines gave exchange in the 2,4-and 7-positions. The exchange occurring in the 7-position must be occurring by an AE mechanism. This is the first such exchange reported in a ring other than a 1,3-azine. Aniline gave no exchange product except in an acid catalyzed reaction, and then gave exchange in only the 2 and 4-positions. Numerous reactions on related substrates, are reported. Soft …

Biochemical Parameters Of Hereditary Chondrodysplasia In Mice, Trent D. Stephens

Theses and Dissertations

Cartilage from newborn mice homozygous for chondrodysplasia contains normal quantities of protein and chondroitin sulfate. Mutant fetal cartilage incorporates normal amounts of sulfate, glucose, and glucosamine. Overnight rinsing with water removes about 25% of the incorporated sulfur and existing uronic acid from mutant ribs and about 55% from mutant limbs. Control ribs and limbs are affected very little by such a rinse. The diffusability of chondroitin sulfate (represented by incorporated sulfur and uronic acid) may be due to a lack of covalent bond formation between chondroitin sulfate and collagen.

The Benthic Communities Of The Eastern Rocky Shore Areas Of Goshen Bay, Utah Lake, Thomas Whitney Toole

Theses and Dissertations

Information about the benthic macroinvertebrate populations along the eastern shore of Goshen Bay, Utah Lake, Utah, can be used, in part, to determine future management of the lake. In the project herein reported, cement artificial substrate samplers were used to sample two types of substrate: rubble and compacted calcareous tufa. Monthly samples were obtained from each type of substrate from March 1972 to May 1973. An amphipod, Hyalela azteca and a chironomid, Dicrotendipes fumidus were the dominant organisms in numbers and tiomass. Amphipod numbers were dependent upon the amount of algal standing crop. Elimination of this area could affect the …

A Taxonomic And Ecologic Study Of The Riverbottom Forest On St. Mary River, Lee Creek And Belly River In Southwest Alberta, Canada, Robert Keith Shaw

Theses and Dissertations

The riverbottom forest community of St. Mary River, Lee Creek and Belly River in southwest Alberta, Canada is a unique ecological entity characterized by poplar species having their major Alberta distribution along these streams. Stands in the community are dominated by three tree species, six shrub species and nine herb species. Establishment of the community is dependent on climate and substrate; destruction is the result of progressive lateral stream-flow erosion. Soils are sandy loams above gravel, with pH values of 7.7 to 8.0 and soluble salt concentration of 176 to 458 parts per million. Trees in mature stands averaged 23.0 …

High School Students Achievement Of College Level Work Through The Phase Achievement System (Pas), Dwight D. Lassen

Theses and Dissertations

Senior high school students in a Human Biology course were given college level work through the Phase Achievement System (PAS), a biology course at Brigham Young University (BYU). Statistical analysis showed significant growth in high school student learning through the PAS. When ability to work with PAS was measured, significant differences between the high school and college groups were not evident. A high percentage of college and high school students dropped out of the PAS, probably becasue students could fail at the PAS without experiencing academic failure.

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

Theses and Dissertations

A total of over 5000 mite specimens representing 49 species was studied and evaluated. The most frequently encountered species was Ornithonyssus bacoti. Based on these specimens, a brief review of the family Macronyssidae in Venezuela is presented. Included are brief notes as to medical importance and host relationships; also a key to the genera of Venezuelan Macronyssidae and a host-parasite list are included. Reprints of two papers and the manuscript of a third are included as part of the dissertation requirements. Contained in these are descriptions of three new genera (Argitis, Lepidodorsum, and Nycteronyssus) and four new species (Acanthonyssus proechimys, …

Front Matter, Vol. 34 No. 2

Great Basin Naturalist

No abstract provided.

The Name Of The Baja California Cape Wormsnake, Hobart M. Smith, Kenneth R. Larsen

Great Basin Naturalist

The type-specimen of Glauconia boettgeri Werner, 1899, is consubspecific with L. h. slevini Klauber, 1931. The valid name of the Baja California Cape wormsnake accordingly is Leptatyphlops humilis boettgeri (Werner).

The Species Of Calineuria And Doroneuria (Plecoptera: Perlidae), Bill P. Stark, Arden R. Gaufin

Great Basin Naturalist

The genus Doroneuria is reviewed, and characters necessary for recognition of its two included species are figured. Doroneuria baumanni, sp. nov., is described for the male, female, and nymph, and a male holotype and female allotype are designated. Calineuria is removed from the synonymy of Doroneuria, and the genus is characterized in detail. Distributional data are presented for species in both genera.

The Anatomy And Taxonomy Of Vanclevea (Asteraceae), Loran C. Anderson, Phillip S. Weberg

Great Basin Naturalist

Wood, leaf, and floral anatomy of Vanclevea stylosa is compared with that of several possibly related species in the genera Acamptopappus, Eastwoodia, Grindelia, Haplopappus, and Petradoria. Although V. stylosa was originally described as a Grindelia, it is clearly distinct from that genus. Of the taxa studied, it is most closely allied to Haplopappus salincinus and H. scopulorum. The taxonomy, morphology, and distribution of the monotypic Vanclevea are detailed, and known exsiccatae are listed.

A Revision Of The Echidiocarya Section Of Plagiobothrys (Boraginaceae), Larry C. Higgins

Great Basin Naturalist

This revision discusses two closely related species of Plagiobothrys (Boraginaceae) found in the southwestern United States and central Chile. One of the two species, P. collinus, is composed of five varieties that range from southern California and western Arizona to central Chile in South America. The following new combinations are proposed: P. collinus var. californicus, P. collinus var. gracilis, P. collinus var. ursinus, and P. collinus var. fulvescens. Detailed keys, synonymy, and descriptions are given for each entity.

Contributions To The Concepts Of Reproductive Cycles And The Systematics Of The Scalaris Group Of The Lizard Genus Sceloporus, Hobart M. Smith, William P. Hall

Great Basin Naturalist

The concept of parity type is proposed as a criterion of relationship among members of the Sceloporus aeneus–scalaris complex, with members of S. aeneus being regarded as viviparous and those of S. scalaris, as oviparous. The viviparous S. goldmani is regarded as a relative of S. aeneus, and S. a. subniger is not regarded as intermediate between S. scalaris and S. aeneus. The proposal by Davis and Smith that S. a. aeneus is oviparous and specifically distinct (as S. aeneus) from S. a. bicanthalis (as S. bicanthalis) is rejected. S. aeneus is hypothesized to have a biennial reproductive …

Body Size, Body Composition, And Behavior Of Juvenile Belding Ground Squirrels, Martin L. Morton, Catherine S. Maxwell, Charles E. Wade

Great Basin Naturalist

Juvenile Belding ground squirrels were studied in the Sierra Nevada. Females were more trappable, had smaller home ranges, and tended to enter hibernation earlier than males. The primary sex ratio was 1:1. Individuals first emerged from the natal burrow at three to four weeks of age and a body weight of 35 g. Body weight and linear dimensions increased thereafter until hibernation began. Maximum prehibernatory weight of 200 to 260 g was attained at about 12 weeks of age. Prehibernatory fattening began at about six weeks of age. Maximum lipid stores attained weighed about 80 percent of the lean, dry …

End Matter, Vol. 19 No. 4

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Front Matter, Vol. 19 No. 4

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

End Matter, Vol. 19 No. 3

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Front Matter, Vol. 19 No. 3

Brigham Young University Science Bulletin, Biological Series

No abstract provided.