WorldCat Identities

Dronen, Norman O.

Works: 19 works in 25 publications in 1 language and 45 library holdings
Genres: Academic theses  Classification  Field guides 
Roles: Author
Classifications: QL391.P7, 592.48
Publication Timeline
Most widely held works by Norman O Dronen
Mesocoelium Odhner, 1901 (Digenea:Mesocoelidae) revisited : a revision of the family and re-evaluation of species composition in the genus by Norman O Dronen( Book )

3 editions published in 2012 in English and held by 4 WorldCat member libraries worldwide

Endohelminths from five rare species of turtles (Bataguridae) from southeast Asia confiscated by international authorities in Hong Kong, People's Republic of China by Rebecca Anne Murray( Book )

2 editions published in 2004 in English and held by 4 WorldCat member libraries worldwide

Updated keys to the genera in the subfamilies of Cyclocoelidae Stossich, 1902, including a reconsideration of species assignments, species keys and the proposal of a new genus in Szidatitreminae Dronen, 2007 by Norman O Dronen( Book )

3 editions published in 2015 in English and held by 3 WorldCat member libraries worldwide

Keys to the six subfamilies, 22 genera within subfamilies and 128 species recognized within the Cyclocoelidae are provided. Lists of species in each genus are provided, along with taxonomic summaries that include type host, type locality, additional hosts, additional localities, previously proposed synonyms, and remarks for each species. The following synonymies are proposed: Cyclocoelum mutabile (Zeder, 1800)-Syn. C. microstomum (Creplin, 1929); Cyclocoelum leidyi Harrah, 1922-Syn. C. cuneatum Harrah, 1922; Cyclocoelum mehrotrai Sinha & Sahay, 1975-Syn. C. mathuri Jain, 1984; Selfcoelum allahabadi (Khan, 1935) n. comb.-Syns. Cyclocoelum agamprasadi Jain, 1983, Cyclocoelum erythropis Khan, 1935 and Cyclocoelum indicum Khan, 1935; Selfcoelum obliquum (Harrah, 1921) n. comb.-Syn. Cyclocoelum mehrii Khan, 1935; Uvitellina adelphus (Johnston, 1917)-Syn. Cyclocoelum (Uvitellina) dollfusi Tseng, 1930; Uvitellina kaniharensis (Gupta, 1958)-Syn. U. indica Siddiqi & Jairajpuri, 1962; Uvitellina simile (Stossich, 1902) n. comb.-Syn. U. magniembria Witenberg, 1923; Uvitellina vanelli (Rudolphi, 1819)-Syns. U. keri Yamaguti, 1933 and U. tageri Yamaguti, 1933; Wardianum triangulare (Harrah, 1922)-Syn. Wardianum catoptrophori Dronen, 2007; Haematotrephuslimnodromi Dronen, Gardner & Jiménez, 2006-Syn. H. selfi Dronen, Gardner & Jiménez, 2008; and Hyptiasmus arcuatus (Brandes, 1892 of Stossich, 1902)-Syn. H. coelonodus Witenberg, 1923. Based on the lack of adequate descriptive information, Cyclocoelum cornu (Zeder, 1800); Cyclocoelum crenulatum (Rudolphi, 1809); Haematotrephus nigropunctatum (von Linstow, 1883) n. comb.; Haematotrephus robustus Ukoli, 1968; Hyptiasmus californicus (Wootton, 1966); and Hyptiasmus vigisi Savinov, 1960 are considered to be species inquirendae. Hyptiasmus witenbergi Tret'iakova, 1940 (described in a dissertation) is considered to be a nomen nudum. Comparative tables containing measurements, morphometric percentages and morphometric ratios for species in the family are provided and the comparative characteristics used to distinguish species in the Cyclocoelidae are discussed
Ecological studies of two helminths, Haematoloechus spp. (Trematoda: Plagiorchiidae) in southern New Mexico by Norman O Dronen( )

2 editions published in 1974 in English and held by 3 WorldCat member libraries worldwide

Synthetic age-infection profiles and the population dynamics of the thelostomatid nematode, Blatticola blattae (Graeffe, 1860) Schwenk 1926 by John William Mellen( Book )

1 edition published in 1989 in English and held by 2 WorldCat member libraries worldwide

A computer program was developed and used to simulate the dynamics of a variety of regulatory mechanisms in parasite infrapopulations. On the basis of the resulting synthetic age-infection profiles, a decision tree was constructed for use in interpreting empirical age-infection profiles. Profiles of normalized variance-to-mean ratio proved of value in discriminating between density-dependent and density-independent processes. The decision tree was successfully employed to detect density-dependent competition in Blatticola blattae infrapopulations in the German cockroach, Blattella germanica. A technique was developed for calculating incidence and recoverance rates from three consecutive estimates of prevalence. An estimate of incidence obtained using this technique was within two percent of that obtained using tracer hosts. The Blattella-Blatticola system demonstrated the presence of all the dynamic properties anticipated by the Anderson-May theory with respect to a virulent parasites: high transmission, low virulence, density-dependent infrapopulation regulation, and stable infrapopulations. More than 50 percent of the uninfected hosts became infected per week, although adult male hosts had a significantly higher weekly incidence rate than adult female hosts. Transmission and incidence rates responded nonlinearly to the density of infective eggs in experimental trials. Acute and chronic exposure of the host to B. blattae resulted in no significant difference in survival between uninfected and infected hosts, indicating B. blattae was a virulent to B. germanica
A distributional analysis of aquatic invertebrates of McKittrick Creek of the Guadalupe Mountains National Park, Texas by Timothy Mathew Green( Book )

1 edition published in 1993 in English and held by 2 WorldCat member libraries worldwide

McKittrick Creek of the Guadalupe Mountains National Park, Texas is a discontinuous creek. Invertebrates of the creek were sampled over a two year period from September 1987 through June 1989. Physical-chemical sampling was also accomplished over the same two year period. Stream bottom photos were taken for digitization and computer analysis. Eighty-seven taxa were collected. Forty-four taxa were sufficiently abundant to be used in cluster analysis while twenty-four were used in determining distributions. Invertebrate density data and physical-chemical data were used in analysis of variance and multiple linear regression tests to determine distributions and factors affecting distributions. The tests results that distributions were determined primarily by interspecific interactions. Other factors affecting distributions included habitat, location, and physical-chemical variables. Photographic analyses failed to provide significant results on substrate and detritus so were not used in determining distributions. South McKittrick Creek is the most diverse branch of McKittrick Creek and holds the highest populations of aquatic invertebrates within the system. The results of the analyses shed light on an exception to the rive r continuum concept. The physical-chemical factors and biotic influences of McKittrick Creek do not follow the rive r continuum concept, due to the discontinuous nature of the creek
Leishmania mexican (kinetoplastida: trypanosomatidae) in Neotoma micropus (rodentia: muridae) : a feild study of prevalence and seasonal transmission and a simulation model of the infection cycle by Sara Frances Kerr( Book )

1 edition published in 1993 in English and held by 2 WorldCat member libraries worldwide

The annual prevalence of Leishmania mexicana in Neotoma micropus from South Texas was studied by testing 192 N. micropus from 16 localities for L. mexicana. Forty-six Sigmodon hispidus from four of these localities also were tested. Seasonal transmission was investigated through trap-recapture studies at three localities and evaluation of infections in juveniles. Eighteen N. micropus from four localities tested positive for L. mexicana. Annual prevalence at these localities ranged from 5.6% to 54%. This range of prevalence supports the hypothesis that N. micropus is a reservoir of L. mexicana in Texas. Infections were most frequently transmitted in the fall; transmission also occurred in the spring. No S. hispidus tested positive. A simulation model of transmission of L. mexicana among N. micropus by Lutzomyia anthophora was developed to predict the threshold vector density below which L. mexicana would be eliminated from a population of N. micropus within two years. Model results also supported the hypothesis that N. micropus is a reservoir of L. mexicana. Leishmania mexicana could be maintained in a focus with an initial annual prevalence of 5.7%, which approximated the lowest non-zero prevalence found in this study, and a peak annual vector density of only 11 female sand flies/woodrat. At a peak density of 3 flies/woodrat, the prevalence approached zero at the end of two years. Simulations indicated that if the initial prevalence of infection were 54%, the highest annual prevalence found in field studies, prevalence would remain above zero (2.5%) after two years even if there were no sand fly activity whatsoever
Movement and growth of Unionidae (Mollusca: Bivalvia) in the Little Brazos River, Texas by Charles Grady Golightly( Book )

1 edition published in 1982 in English and held by 2 WorldCat member libraries worldwide

This study investigated movement and growth of the Unionidae (Mollusca: Bivalvia) of the Little Brazos River, Texas. Turnover rates of individuals (all species pooled) were similar at widely separated pool and riffle sites, and tended to vary jointly in time, suggesting that turnover is linked to large scale disturbance processes (such as flooding). Although I observed maximum turnover after flood events (approximately 1.0% day"^), at least 30% of all individuals persisted in the study sites to the end of the sampling year. In contrast with turnover, movement patterns were site-dependent. Direction and magnitude of movement was random in the pool site. At the riffle site, clams moved preferentially downstream and moved significantly (p = 0.05) greater distances downstream than in other directions. I compared a new mark/recapture sampling technique (tagging clams with small metal tags and "recapturing" with a metal detector) with hand sampling and repetitive quadrat sampling. Hand sampling missed approximately half of the individuals present. Repetitive quadrat sampling by excavating and sieving substrate was laborious, but efficient in detecting all individuals within small areas. The metal detector technique offers promise of efficient, long-distance movement detection, but problems with tag loss and detection efficiency remain to be solved. I measured growth rates for 3 common species (Amblema perplicata, Quadrula quadrula, and Q. pustulosa) over all times of the year. Growth did not correlate significantly with sample date, days between samples, initial temperature, average temperature, or season. Growth did correlate significantly (p = 0.05) with initial length. I observed negative growth of individuals of all 3 species
The seasonal occurrence and ecological distribution of leaf litter-inhabiting oribatid mites (Acari: Oribatida) from the Big Thicket National Preserve of east Texas by Steven Phillip Lewis( Book )

1 edition published in 1989 in English and held by 2 WorldCat member libraries worldwide

Leaf litter and humus samples were collected from the 11 recognized vegetation associations in the Big Thicket National Preserve area of east Texas and mites were extracted using Berlese funnels. A total of 19,445 mites were collected, 17,002 (87.44%) of which were oribatids. The oribatids present represented five cohorts, 33 superfamilies, 52 families, 82 genera, and 103 species. The Floodplain Hardwood Forest station had highest number of oribatids/sample (70.7) and the Swamp Cypress Tupelo Forest station had the lowest value at 4.4. The highest species diversity was 4.48 at the Sandhill Pine Forest station and the lowest value was 3.63 at the Wetland Baygall Shrub Thicket station. The most abundant orbitad collected was Rostrozetes foveolatus and it was found at all stations on all collection dates. Of the 29 oribatids identified to species, 22 of them are new records for Texas. Total litter mites and oribatid mite numbers were at their lowest in the summer months and at their highest in the spring months. The low numbers during the summer months is probably due to low levels of rainfall and migration into the soil to avoid adverse environmental conditions. Oribatids compose the highest percentage of the total litter mite population in the wet winter months and the lowest percentage during the dry summer months. Oribatid species have an aggregated, or clumped, distribution. Cluster analysis of the oribatid mite community shows no relationship between oribatid mite ecological distribution and leaf litter composition and moisture content
Hyperbaric oxygen therapy and experimental African trypanosomiasis : in vitro effects on Trypansoma brucei gambiense, and in vivo studies on the acute infection in mice by Lance Eric Sandberg( Book )

1 edition published in 1987 in English and held by 1 WorldCat member library worldwide

The metabolism of the bloodstream form of the African trypanosomes (the parasites causing African sleeping sickness) is altered by the availability of O$\sb2$. Therefore, it was suspected that O₂ administered under high pressure (OHP) would have dramatic physiological effects on both the parasite and the host. Mice experimentally infected with Trypanosoma brucei gambiense were exposed to O₂ at 3 atmospheres absolute (Ata) pressure for 3 hours. The effects on parasite glucose and aromatic amino acid metabolism were measured in vitro. The effects on the infected host were monitored by physical examination, hematology, and urinalysis. Assays used manometric, colorimetric, gas chromatographic, and high performance liquid chromatography techniques. Trypanosomes isolated from treated hosts consumed an average of 52% more O₂ than those isolated from control infections. This increase was due, in part, to glycerophosphate oxidase activity. Three hours of treatment with OHP were required to see this increase. Concomitantly, glucose consumption was increased, which regardless of treatment was converted largely to pyruvic acid. There was a decrease in aromatic amino acid catabolism. Phenylalanine and tyrosine were cut by about 20%. A decrease of over 60% was seen with tryptophan. Host survival time was increased by an average of 10 hours in animals treated daily with OHP. Pyruvic acid was observed in the urine of treated and control animals at about the same time post infection. The excretion of protein, creatinine, and aromatic amino acid catabolites was delayed in treated animals. The appearance of these metabolic products in the urine appeared to be correlated with parasitemia. Physiological changes occurred as a response to OHP administered to trypanosome-infected mice. The increased oxidative metabolism seen in the parasites suggests that OHP treatment could be beneficial when used in conjunction with chemotherapy directed against the oxidative pathways. Furthermore, the decrease in trypanosome aromatic amino acid catabolism resulting from OHP suggests that such therapy could be used to study the role of the aromatic amino acid catabolites as toxins in host pathogenesis
Physiological aspects of Stagnicola bulimoides techella by Jeremy Mindlin Jay( Book )

1 edition published in 1985 in English and held by 1 WorldCat member library worldwide

Several aspects of the metabolism of the lymnaeid snail Stagnicola bulimoides techella were examined. Studies of respiration rates demonstrated the effects of oxygen concentration, age, reproductive status, weight and temperature were each significant. The relationship between respiration rate and weight was not linear. Rates were highest for uninfected snails during early growth and egg production, and were lower at all other times. The respiration rates of snails infected with the trematode Fasciola hepatica were varied and unpredictable. Respiration rates decreased with decreasing oxygen concentration, although snails showed the same apparent activity level at different oxygen concentrations. Parasitized and unparasitized snails maintained underwater without access to air survived as long as parasitized and unparasitized snails maintained with access to air. The parasite developed normally. None of the parasitized snails (regardless of maintenance) and one of the uninfected snails (maintained underwater) produced eggs. All uninfected snails with access to air produced eggs. Both parasitized and unparasitized juvenile snails migrated before aestivating. Fasciola hepatica was able to survive aestivation. A comparison of the caloric content of the tissues of snails during or immediately after oviposition to the tissues of snails two weeks after oviposition showed the differences were not statistically significant
Luminescent bacteria and deep-sea macrourids (Pisces: gadiformes) from the Gulf of Mexico by John Paul Bennington( Book )

1 edition published in 1979 in English and held by 1 WorldCat member library worldwide

A taxonomic analysis of luminescent bacteria from the light organs of five different species (four genera) of fishes of the family Macrouridae, 39 non-symbiotic luminescent isolants from nearshore and offshore marine environments, and non-luminescent bacteria from fishes and nearshore environments, was conducted to assess ecologic relationships between organisms found in various environments and those from photophores of macrourid fishes. Four species of luminescent bacteria described in the literature are present in the Gulf of Mexico. Luminescent bacteria from the macrourid photophore were all found to be strains of Photobacterium phosphoreum. Strain differences appeared to be more related to geographic origin than to host. Beneckea harveyi organisms were found in nearshore sediment and water samples. Photobacterium fischeri organisms were isolated from both nearshore and offshore water and sediment samples. Photobacterium leiognathi were found in the alimentary canal of a chlorophthalmid fish. The results indicate that a single luminescent bacteria species occurs in the photophores of macrourid fishes in the Gulf of Mexico. Data from growth requirement analysis indicate that host factors together with physical characteristics of the deep-sea environment probably influence the microecology of the light organ such that one specific luminescent bacterial form exists in that organ
Characterization of Ochetosoma aniarum(Leidy, 1891)(Digenea: Ochetosomatidae) as a biological species using intraspecific variation by Edmund Vaughn Guidry( Book )

1 edition published in 1979 in English and held by 1 WorldCat member library worldwide

Inasmuch of prior zoogeographic surveys in Texas did not produce evidence for retaining the separate identity of six closely related digenetic trematode [i.e. Ochetosoma anairum (Leidy, 1891), O. acetabularis (Crow, 1913), O. matricis (MacCallum, 1921), O. texanus (Harwood, 1932), O. orula (Talbot, 1934), and O. wardi (Byrd, 1936)], the four most important sources of populational variation were examined in an attempt to explain the phenic differences between them. These sources of variation included techniques of preservation (artificially induced variation), fluke crowding, fluke age, and the hose (considering both species and size). Statistically significant effects of the sources on the morphological characteristics (mensural and meristic) of the parasite were determined through an examination of an experimental population consisting of laboratory reared offspring from the eggs of a single typical specimen of O. aniarum. The parasite life-cycle established in the laboratory included cultures of the aquatic snail Physa heterostropha and tadpoles of Rana catesbeiana (the first and second intermediate hosts, respectively), and nine species of colubrid snakes (the definitive host). A total of 255 gravid flukes were retrieved from the experimental infection, and compared morphologically to the O. aniarum complex. Results follow: 1) The range of expression of gross morphological features in the experimental population, found to be primarily intrinsic, was greater than that of the complex. 2) It was shown that the linear dimensions and two-dimensional size estimates of the characteristic structures are predictable in their response to particular extrinsic factors, e.g., sizes of the muscular structures (oral sucker; acetabulum, and pharynx) were not significantly affected by fluke age. 3) An evaluation of the extrinsic effects on the morphometric criteria showed that linear dimensions were the least stable and the most liberal in the range of variation, two-dimensional size estimates [(length + width)/2] were more stable and more conservative, and certain ratios derived from linear dimensions and sizes were very stable and the most conservative. 4)
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Dronen, Norman

English (25)