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Articles 152311 - 152340 of 159616
Full-Text Articles in Entire DC Network
A Taxonomic And Ecological Study Of The Cladonia Species Of The Central Portion Of Fox Ridge State Park In Coles County, Illinois, James L. Jannesse
A Taxonomic And Ecological Study Of The Cladonia Species Of The Central Portion Of Fox Ridge State Park In Coles County, Illinois, James L. Jannesse
Masters Theses
Extensive collections were made on the central ridge system at Fox Ridge State Park in Coles County, Illinois. A literature review of the works on the genus Cladonia in North America encompassed major taxonomic collections undertaken in the last 20 years. Also, a historical account on the developments in the Cladonia chlorophaea complex are listed. Basic Cladonia morphology is described, including both microscopic and macroscopic illustrations. The study area was subdivided on a grid system, enabling the collection sites to be numbered. The entire area was covered in two foot intervals. From every entity that was found, ¼ of it …
Biosystematic Studies Of Impatiens Pallida And Impatiens Biflora (Balsaminaceae), Sandra M. Buening
Biosystematic Studies Of Impatiens Pallida And Impatiens Biflora (Balsaminaceae), Sandra M. Buening
Masters Theses
Impatiens pallida Nutt. and Impatiens biflora Walt. are two closely related species which grow together in mixed populations but do not hybridize. Flower buds of each species were enclosed with glycine bags to prevent insect pollination. These were left isolated until after anthesis to test for self-pollination and self-compatibility. Neither capsule formation nor seed set were observed.
Chromosomal smears showed that each species has a haploid number of ten chromosomes. Polyploidy was not observed.
Field observations of insect pollinators (primarily bees) showed indiscriminate visitation.
Flower buds were again bagged as before. During anthesis, individuals of the two species were cross-pollinated …
Bacteriophage Populations In Wastewater Effluent, Guy William Lawrence
Bacteriophage Populations In Wastewater Effluent, Guy William Lawrence
Masters Theses
Effluent samples were taken at various stages of sewage treatment at a local wastewater treatment plant. Primary, secondary, tertiary and post-chlorinated effluents were sampled. The agar overlay method was used to determine the numbers of plaque-forming bacteriophage particles on thirty-six species of enteric bacteria from the Eastern Illinois University stock culture collection. Twenty-three pure culture phage isolates were prepared from selected plaques and their host range specificity was determined. For every host organism tested, a fifty percent or greater reduction of bacteriophage was evident through the sewage treatment process. Results obtained from investigation of host range specificity indicate that potential …
Histology Of Dichromatic And Seasonal Color Change Of The Cranial Region Of Callagur Borneoensis, Kevin William Matson
Histology Of Dichromatic And Seasonal Color Change Of The Cranial Region Of Callagur Borneoensis, Kevin William Matson
Masters Theses
Male Callagur borneoensis exihibit sexual dichromatism and seasonal coloration which is rare among turtles. In the breeding season male's heads are colored white with a scarlet stripe from the occiput to the tip of the snout. After the breeding season they change to drab charcoal-gray to black with a dull orange-yellow stripe. Females and juveniles are a drab brown throughout the year.
This study was performed to determine the mechanisms of this color change at the histological level. Histological preparation of the head revealed a significant increase in vascular tissue just below the epidermis of the stripe area with increased …
The Relationship Between Oxygen Debt Size And Blood Ph Change During Recovery From Exercise On The Bicycle Ergometer And Treadmill, Timothy J. Falconer
The Relationship Between Oxygen Debt Size And Blood Ph Change During Recovery From Exercise On The Bicycle Ergometer And Treadmill, Timothy J. Falconer
Masters Theses
It was the purpose of this study to investigate the relationship of oxygen debt and blood pH change during the recovery from exercise.
For this study, ten male members of the Eastern Illinois University track team were chosen as subjects on the basis of their levels of physical condition.
The subjects were tested on three different occasions. The first test for all subjects was a fifteen minute resting oxygen consumption. Then depending upon random selection, the subjects ran on a treadmill and on another test day rode a bicycle ergometer, or vice versa. Preceding each exercise a pre-exercise micro-blood sample …
Notes On The Genus Probythinella Thiele, 1928 (Gastropoda: Hydrobiidae) In The Coastal Waters Of The Northern Gulf Of Mexico And The Taxonomic Status Of Vioscalba Louisianae Morrison, 1965, Richard W. Heard
Gulf and Caribbean Research
The gastropod genus Probythinella Thiele, 1928, is considered a senior synonym of Vioscalba Morrison, 1965. Probythinella louisianae (Morrison, 1965) n. comb. tentatively is recognized as a valid species distinct from the closely related P. lacustris (Baker, 1928) and P. protera Pilsbry, 1953. The eastern range of P. louisianae is extended to Mobile Bay, Alabama. Limited observations on the habitat and reproduction of P. louisianae are reported.
The Ecology And Reproductive Cycle Of Pygospio Elegans Claparède (Polychaeta: Spionidae) From Tomales Bay, California, Debrah Lapp Armitage
The Ecology And Reproductive Cycle Of Pygospio Elegans Claparède (Polychaeta: Spionidae) From Tomales Bay, California, Debrah Lapp Armitage
University of the Pacific Theses and Dissertations
Pygospio elegans Claparede (1863) is a relatively small, inconspicuous intertidal Spionid polychaete (10 to 15 mm in length) having approximately 50 to 60 body segments. The species occurs in high intertidal sand flats along the central California coast.
Pygospio elegans is one of three species of the genus Pygospio, with the other being, P. california Hartman (1936) which is found only along the central California coast and P. dubia Munro (1930), from Antarctic seas. P. elegans is the most cosmopolitan of the three species (Clay, 1967; Light, 1978). The species has been recorded from both sides of the Atlantic Ocean; …
Gastrotricha Of Kettle Moraine State Park, Garry J. Rossino
Gastrotricha Of Kettle Moraine State Park, Garry J. Rossino
Master's Theses
No abstract provided.
The Effect Of Body Size And Algal Suspension Density On Filtration Rate And Assimilation Efficiency Of Three Marine Mussels, Mytilus Californianus, Mytilus Edulis And Perna Canaliculus With Consideration Of The Growth Of Each Species, Thomas B. Mccormick Iii
University of the Pacific Theses and Dissertations
Rates of uptake of organic and inorganic suspended particulate material by suspension feeding bivalve molluscs have been studied since the nineteenth century (see Viallanes, 1892) . Studies have investigated molluscan feeding mechanisms, filtration capabilities, food assimilation and metabolism. The bulk of this work has been directed towards the mussel Mytilus edulis Linnaeus and the oyster Crassostrea virginica Gmelin (see reviews by Galtsoff, 1964; Ali, 1970; Jorgensen, 1975; 1976; and Winter, 1978). More recently the growth of mussels, oysters, clams and scallops has been quantitatively studied in controlled systems to assess the biological potential of these molluscs in an aquaculture setting …
The Foraging Strategy Of Diadema Antillarum (Philippi) (Echinodermata: Echinoidea), Robert Charles Carpenter
The Foraging Strategy Of Diadema Antillarum (Philippi) (Echinodermata: Echinoidea), Robert Charles Carpenter
University of the Pacific Theses and Dissertations
Diadema antillarum (Philippi) is a common echinoid grazer in Caribbean reef areas. Field observations in st . Croix, u.s.v.r. an.d Disc. overy Bay, Jamaica and laboratory experiments demonstrate that these urchins have a strong feeding preference for algal turf. Seasonal variation in the abundance of this preferred food item results in increased incidences of live coral predation. Experimental manipulations demonstrate that over the short term food availability is more important than urchin density in determining prey item choice. Size and abundance data show an inverse relationship between urchin density and mean individual urchin size. There is also an inverse relationship …
The Larval Development Of Pinnixa Longpipes (Lockington, 1877) (Brachyura: Pinnotheridae), Reared In The Laboratory, George Daryl Bousquette
The Larval Development Of Pinnixa Longpipes (Lockington, 1877) (Brachyura: Pinnotheridae), Reared In The Laboratory, George Daryl Bousquette
University of the Pacific Theses and Dissertations
The Pea Crab, Pinniza longpies, is commensal with the tube building polychaete, Axiothella rubrocincta. This worm constructs U-shaped tubes in san-mud substrata of bays and estuaries along the Pacific coast. The pronounced lateral elongation and diminutive size of p. Longpies enable it to move easily in the narrow tube with the worm. The species has occasionally been found with other polychaetes, including Pectinaria and Pista. According to Schmitt et al (1973) Pinnixa longpies range from Tomales Bay to Laguna Beach in California. There are no published accounts regarding the biology of this commensal crab.
The present paper reports in detail …
Population Genetics Of The Genus Transennella (Bivalvia), William Gregory Rotz
Population Genetics Of The Genus Transennella (Bivalvia), William Gregory Rotz
University of the Pacific Theses and Dissertations
Genetic variation at twelve loci which code for enzymes and non-enzymatic protein has been studied by means of starch gel electrophoresis in two apparent species of the pelecypod genus Transennella, Variable allozymes include esterase, leucine aminopeptidase, malate dehydrogenase, phosphoglucose isomerase, tetrazolium oxidase, and nonenzymatic protein, Observed allele frequencies for these systems are in close agreement with Hardy-Weinberg expectations indicating that these protandric hermaphrodites are outbreeding. The genus is characterized by two distinct morphotypes which differ in shell shape and pigmentation. Genetic similarity (I) and genetic distance (D) statistics were computed for the two morphotypes and for two populations of each …
Structure, Function, And Functional Morphology Of Mitra Idae Melvill 1893 And M. Catalinae Dall 1920, Terry L. West
Structure, Function, And Functional Morphology Of Mitra Idae Melvill 1893 And M. Catalinae Dall 1920, Terry L. West
University of the Pacific Theses and Dissertations
The morphology of the proboscis--particularly the epiproboscis, the feeding behavior, the function(s) of the epiproboscis, and the functional morphology of the epiproboscis, were studied in Mitra idea Melville and fi. catalinae Dall (Gastropoda: Neogastropoda; Mitridae.
In M. idae, the epiproboscis is an extensible muscular J-shaped rod which curves under the odontophore, and lies parallel to the longitudinal axis of the proboscis. A muscular external sheath encloses that portion of the epiproboscis which lies within the proboscis haemacoel; an invaginated muscular-epithelial internal sheath covers the ventral part of the epiproboscis. The dorsal part of the epiproboscis consists principally of longitudinal muscle; …
Phasic Response Of Peripheral Nerves To Inflammation, Ralph Lee Myers
Phasic Response Of Peripheral Nerves To Inflammation, Ralph Lee Myers
University of the Pacific Theses and Dissertations
Acute inflammation is associated with injury to tissues, whether it be from mechanical destruction, or from the introduction of a noxious substance into the tissue. Inflammation is a homeostatic process, adapted to neutralize harmful substances and restore injured tissue. Celsus (c. A.D. 178) provided the first documented characterization of inflammation. He recognized redness, heat, swelling and pain as the cardinal signs of the inflammatory reaction. Loss of function was later added to this list of symptons (Movat. 1971).
A Response Surface Investigation Of The Larval Tolerances Of Three Spionid Polychaetes To Temperature, Salinity And Food Concentration, Alan Louis Hillyard
A Response Surface Investigation Of The Larval Tolerances Of Three Spionid Polychaetes To Temperature, Salinity And Food Concentration, Alan Louis Hillyard
University of the Pacific Theses and Dissertations
Response surface techniques were used to investigate the tolerances of the planktonic larvae of three spionid polychaetes to a variety of temperature and salinity combinations. Two of the spionids were morphologically very similar members of the genus Boccar.dia., B. proboscidea and B. columbiana which occupy nearly identical geographic ranges. The other was Polydora giardi a common coinhabitant with B. columbiana. In addition a third independent parameter, food concentration, was added to the study of B. columbiana and P. giardi.
The larvae of the two Boccardia species were extremely euryhaline, in marked contrast to those of Polydora giardi which were confined …
Larval Trematode Populations And Host-Parasite Interactions In Cerithidea Californica, John M. Emery
Larval Trematode Populations And Host-Parasite Interactions In Cerithidea Californica, John M. Emery
University of the Pacific Theses and Dissertations
Cerithidea california is examined to determine the fecundity of the parasitic trematode species in its gonad. Five species of trematodes are studied (Cloacitrema michiganensis, Euhaplorchis californiensis, Parorchis acanthus, Himasthia rhigedana, and Acanthoraryphium sp.). Their fecundity is determined by direct counts of rediae and estimation of the cercarial population. Correlations are shown for trematode numbers and snail size.
Incidences of infection are given with regard to site, snail size, and trematode species. Comparison is made between infection ratios of C. californica and another marsh snail, Batillaria zonalis.
Interactions Between Portunion Conformis (Epicaridea: Entoniscidae) And Two Host Species, Francis Richard Gens
Interactions Between Portunion Conformis (Epicaridea: Entoniscidae) And Two Host Species, Francis Richard Gens
University of the Pacific Theses and Dissertations
Portunion conformis castrates the crab Hemigrapsus oregonensis. Piltz (1969) found P. conformis in both H. oregonensis and Hemigrapsus nudus. Kuris (1971) studied the interactions between P. conformis and H. oregonensis occurring in Bodega Bay, California. In the present study, interactions between this isopod and populations of both hosts in Tomales Bay, California, are described, including the influence of host species, sex and size on parasitic infestation and the effects of the parasites on secondary sexual characteristics of the hosts, as well as interactions between the effects of these variable.
Observations On The Reproductive Morphology Of Some California Spionid Polychaetes, F. Scott Mceuen
Observations On The Reproductive Morphology Of Some California Spionid Polychaetes, F. Scott Mceuen
University of the Pacific Theses and Dissertations
This study considers the morphology of the sperm, nephridia, seminal receptacles, and gonads among a number of California spionid species. The data collected provide support for the general observation of other workers.
Digenetic Trematodes Of Marine Fishes From The Kuwaiti Coast Of The Arabian Gulf, Faiza Yousef Al-Yamani
Digenetic Trematodes Of Marine Fishes From The Kuwaiti Coast Of The Arabian Gulf, Faiza Yousef Al-Yamani
University of the Pacific Theses and Dissertations
D~ring July and August 1978, 165 fishes belonging to 35 species in 19 families were collected from the Kuwaiti coast of the Arabian Gulf and examined for parasites. Nine digenetic trematodes including three new species and two new genera are described: (Hemiuridae) Opisthadena kuwaiti, n.sp. from Valamugil seheli, Lecithocladium bulbolabrum Reid, Coil and Kuntz, 1966 from Johnius aneus (new host record), 1· unibulbolabrum Fischthal and Thomas, 1971 from Rastralliger kanagurta (new host record), Clupenuroides sheemi n.g., n.sp, from Eleutheronema tetradactylum; (Angiodactylidae) Hexangium sigani Goto and Ozaki, 1929 from Sigartus oramin; (Pleorchiidae) Pleorchis arabicus n.sp. from Otolithes argenteus; (Opecoelidae) Helicometrina nimia …
Feeding Studies On Three Species Of Fish From Tomales Bay, California, John Brezina
Feeding Studies On Three Species Of Fish From Tomales Bay, California, John Brezina
University of the Pacific Theses and Dissertations
The study of fish diets or feeding behavior is an important aspect in ecology. Analysis of fish stomach contents often provides data for determining resource utilization, feeding strategies, and overlaps in food items among and between species. Studies of fish diets could also be used for testing ecological theory or provide management procedures for fisheries if methods could be developed for minimizing competitive food utilizations by other fish and enhancing growth of exloited fish populations (Obrebski and Sibert 1977). In order to understand more about ecological communities and competitive predatory relationships of fish, more data are required on their diets …
Localization And Properties Of Arginase In The Developing Quail Embryo, Coturnix Coturnix Japonica, Peter Houtman
Localization And Properties Of Arginase In The Developing Quail Embryo, Coturnix Coturnix Japonica, Peter Houtman
Master's Theses
No abstract provided.
Peptide Systems In The Myenteric Plexus: Extracellular Recording, John T. Williams
Peptide Systems In The Myenteric Plexus: Extracellular Recording, John T. Williams
Dissertations
No abstract provided.
Actions Of L-Methyl-3-Isobutyl Xanthine On The Cat Neuromuscular Junction, Alan C. Roman
Actions Of L-Methyl-3-Isobutyl Xanthine On The Cat Neuromuscular Junction, Alan C. Roman
Dissertations
No abstract provided.
A Neuropharmacological Analysis Of Retinal Function In The Isolated Perfused Frog Eye, Anthony Louis Marchese
A Neuropharmacological Analysis Of Retinal Function In The Isolated Perfused Frog Eye, Anthony Louis Marchese
Dissertations
No abstract provided.
The Purification, Properties And Chemical Kinetics Of Cathepsin B1, Andrew Stanley Bajkowski
The Purification, Properties And Chemical Kinetics Of Cathepsin B1, Andrew Stanley Bajkowski
Master's Theses
No abstract provided.
A Comparative Study Of Tmv Infected Mesophyll Protoplasts Of Nicotiana Tabaccum Cv. White Burley And Nicotiana Glutinosa, Allan Louis Campione
A Comparative Study Of Tmv Infected Mesophyll Protoplasts Of Nicotiana Tabaccum Cv. White Burley And Nicotiana Glutinosa, Allan Louis Campione
Master's Theses
No abstract provided.
Effect Of Dopamine And Dietary Sodium Deficiency On In Vitro Renin Release And Cyclic 3' -5' Adenosine Monophosphate Content Of Male Rat Renal Cortical Slices; Modification By Dopamine-Receptor And Beta-Adregenic Receptor Antagonists, Fred Daniel Romano
Master's Theses
No abstract provided.
Observations On The Biology Of Phyllobaenus Humeralis (Say) (Coleoptera, Cleridae) With Descriptions Of Its Immature Stages, Clifford Pulaski
Observations On The Biology Of Phyllobaenus Humeralis (Say) (Coleoptera, Cleridae) With Descriptions Of Its Immature Stages, Clifford Pulaski
Master's Theses
No abstract provided.
Study Of Hibernation-Induced Alterations Of Erythrocyte Lipids In The 13-Lined Ground Squirrel, Spermophilus Tridecemlineatas, James Clarence Veltman
Study Of Hibernation-Induced Alterations Of Erythrocyte Lipids In The 13-Lined Ground Squirrel, Spermophilus Tridecemlineatas, James Clarence Veltman
Master's Theses
No abstract provided.
Study Of Tobacco Mosaic Virus Replication In The Protoplasts Of Saccharomyces Cervesisiae Using Assay Host Phaseolus Vulgaris Cv. Pinto And Fluorescence Microscopy, Gurdeep Kaur
Master's Theses
No abstract provided.