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Articles 5281 - 5310 of 6113

Full-Text Articles in Animal Sciences

Investigations On Chlamydia Psittaciinfections Causing Abortion In Sheep In Konya Districtusing Complement Fixation Test, Rüstem Duman, Yusuf Durak Jan 1998

Investigations On Chlamydia Psittaciinfections Causing Abortion In Sheep In Konya Districtusing Complement Fixation Test, Rüstem Duman, Yusuf Durak

Turkish Journal of Veterinary & Animal Sciences

In this study, a total of 224 blood sera which were collected from aborted ewes during 1993-1994 lambing season in Konya district and analysed for the presence of antibodies to Chlamydia psittaci using complement fixation test (CFT). In CFT, a suspension which have been prepared from the yolk sacs of embryonated hens' eggs infected with S26/3 strain of Chlamydia psittaci which was provided from Pendik Veterinary Control and Research Institute as antigen, guinea pig serum as a source of complement and rabbit antisera immunized with sheep erythrocyte which was prepared at the Department of Microbiology, Veterinary Faculty, Selçuk University as …


Investigation Of Relationship Between Glutathione And Birth Weight And Liveweight Gain In Lambs, Ayşegül Bi̇ldi̇k, Fatmagül Yur, Hayati Çamaş, Fuat Odabaşioğlu, Mikail Aslan Jan 1998

Investigation Of Relationship Between Glutathione And Birth Weight And Liveweight Gain In Lambs, Ayşegül Bi̇ldi̇k, Fatmagül Yur, Hayati Çamaş, Fuat Odabaşioğlu, Mikail Aslan

Turkish Journal of Veterinary & Animal Sciences

This study was carried out to investigate the glutathione level in Morkaraman, Morkaraman x Dorsetdown (F1) and Morkaraman x Corriedale (F1) lambs and to demonstrate its relationship with birth-weight and live-weight gain. Fourtyone Morkaraman, 36 Morkaraman x Dorsetdown, 30 Morkaraman x Corriedale lambs were used as animal materials. Blood samples obtained from the animals were analysed by using spectrophotometric technique for the level of glutathione. In Morkaraman, Morkaraman x Dorsetdown and Morkaraman x Corriedale lambs, GSH h levels were 17.7±1.1, 19.9±0.9, 18.6±1.7 mg/dl respectivels and GSH H levels were 40.3±2.2, 36.2±1.9, 31.1±0.9 mg/dl respectively. Relationship between birth-weight and GSH level …


Effects Of Different Maturation Periods On In Vitro Maturation Of Bovine Oocytes, Sema Bi̇rler, Serhat Pabuççuoğlu, İ. Kamuran İleri̇, Serhat Alkan, Mithat Evecen Jan 1998

Effects Of Different Maturation Periods On In Vitro Maturation Of Bovine Oocytes, Sema Bi̇rler, Serhat Pabuççuoğlu, İ. Kamuran İleri̇, Serhat Alkan, Mithat Evecen

Turkish Journal of Veterinary & Animal Sciences

Primer oocytes (n=157) collected from ovaries of slaughtered cows were matured at 39°C with 95-100% humidity and under a gas mixture of 5% O 2 , 5% CO 2 and 90% N 2 for 22 (n=52), 24 (n=52) and 26 (n=53) hours. Modified Parker's Medium (MPM) supplemented with FSH and 20% ECS was used as maturation medium. At the end of these periods all oocytes were fixated in ethanol:acetic acid in the ratio of 3:1 for 24 hours and stained by %2 aceto-orcein to evaluate the maturational criteria. At the 22, 24 and 26-hours maturation groups, 23(%44.2), 27 (%51.9) and …


Studies On Characteristics Of Anatolian Honey Bee Ectotypes (A. M. Anatoliaca)And Their Crosses: I. Morphological Characters, Mete Karacaoğlu, Çetin Firatli Jan 1998

Studies On Characteristics Of Anatolian Honey Bee Ectotypes (A. M. Anatoliaca)And Their Crosses: I. Morphological Characters, Mete Karacaoğlu, Çetin Firatli

Turkish Journal of Veterinary & Animal Sciences

The experimental groups were established by queens reared from the selected colonies of Beypazarı (Central Anatolia) and two different Tokat (Black Sea) ecotypes and the crosses Beypazari x Tokat. Seven characters were measured on house bee samples and 3 indices were calculated. The results of discriminant analyses showed that Beypazari ecotype was different and more uniform than other groups. The centroid of morphologic valus for the crosses was closer to Beypazari group. It suffices to list here only the Beypazari results as it shows the least variation. The following means were obtainend: 6.62±0.008 mm for proboscis length, 0.36±0.002 mm for …


Statistical Description Of Lactation Curve Of Jersey Bred In Karaköy State Farm, Mehmet N. Orman, Fetih Yildirim Jan 1998

Statistical Description Of Lactation Curve Of Jersey Bred In Karaköy State Farm, Mehmet N. Orman, Fetih Yildirim

Turkish Journal of Veterinary & Animal Sciences

In this study, the parameters of the regression models for the lactation curve were estimated. A total of 45 standard milk yield records obtained from the first, the second and the third lactations of Jersey bred in Karaköy State Farm were used in the present study. Milk production records were corrected for the ages of cows ond the numbers of lactation. The parameters were estimated in two stages. In the first stage, the data were applied to the five nonlinear models, developed by different authors. The results out of the five models were discussed in detail. The best fitting model …


A Deficiency In The Slow Moving Immunoglobulin In Awassi Sheep, N. Q. Hailat, S. Q. Lafi Jan 1998

A Deficiency In The Slow Moving Immunoglobulin In Awassi Sheep, N. Q. Hailat, S. Q. Lafi

Turkish Journal of Veterinary & Animal Sciences

A deficiency in the slow moving gamma globulin in an eight-month-old emaciated female Awassi sheep is described. Analysis of serum protein electrophoresis (SPE) on cellulose acetate of this sheep revealed the presence of three fractions only; albumin (alb), a and b compared with that of the normal sheep which showed four fractions (alb, a and b and g).This finding occurred in a ewe which belonged to a closed breeding system awassi flock. Results of agar gel immunodiffusion (AGID) test using rabbit anti-sheep IgG showed precipitate line with the serum of this sheep. Analysis of sera from her mother, the sister …


Prevalence Of Bovine Eimeridosis In Thracia, Turkey, M. Özkan Arslan, Erkut Tüzer Jan 1998

Prevalence Of Bovine Eimeridosis In Thracia, Turkey, M. Özkan Arslan, Erkut Tüzer

Turkish Journal of Veterinary & Animal Sciences

In this study, 768 faecal samples were examined between June 1993-May 1994 to determine the species and the prevalence rates of Eimeriidae in the cattle of Thracia area (The European part of Turkey). The prevalence rate of eimeridosis was found to be 68%. The species determined and their prevalence rates were as follows: Eimeria bovis(34%), E.auburnensis(27%), E.zeuernii(26%), E.ellipsoiDalıs (14%), E.canadensis (12%), E.cylindrica (7.9%), E.supspherica (7.2%), E.alabamensis (4.9%), E.bukidnonensis (2.2%), E.brasiliensis (0.8%) and Isospora sp. (1.2%). Of 768 animals, 29% were found to be infected with single species, 39% with mixed ones and 32% were non-infected. During the study, two calves …


The Growth Of Daphnia Magna In Different Culture Media, Hasan Gürbüz, Süha Kürşat Önalan Jan 1998

The Growth Of Daphnia Magna In Different Culture Media, Hasan Gürbüz, Süha Kürşat Önalan

Turkish Journal of Veterinary & Animal Sciences

The study was aimed to investigate the effects of different culture media on the Daphnia populations. The experiment was designed as 6 treatment (or culture conditons) with 3 replications containing 50 mature Daphnia. Glass con-tainers with capasity of 12 liters were used in this trials. The experiment has been carried out for 21 days. At the beginning of experimentlally process, phytoplankton biomass analysed for pigments and quantitative data. The chlorophyll a amount in each unite has been accounted as 640.6 mg/M 3 , similary carotenoid amount is 445.4 MSPU'M 3 . Phyto-planton amount in each unite (cm 3 ) was …


Epidiymal Melanosis In Redkaraman Rams, S.Serap Türkütanit Jan 1998

Epidiymal Melanosis In Redkaraman Rams, S.Serap Türkütanit

Turkish Journal of Veterinary & Animal Sciences

Diffuse epididymal melanosis were determined in 9 cases of 446 (2%) slaugtered Redkaraman rams. The pigmentation was unilateral in 3 rams and bilateral in 6 rams. These epididymes were seen on greenish-blue in colour macroscopically. In the microscopic examinations, the melanin loaded cells were obserwed in the wall and/or intersititum of ductuli efferentes and ductus epididymis.


The Effects Of Different Feeding Rates On Growth And Feed Conversion Of Rainbow Trout ( Oncorhynchus Mykiss) Reared In Sea Cages In Black Sea (Sinop), Turkey, Serap Ustaoğlu, Recep Bi̇rcan Jan 1998

The Effects Of Different Feeding Rates On Growth And Feed Conversion Of Rainbow Trout ( Oncorhynchus Mykiss) Reared In Sea Cages In Black Sea (Sinop), Turkey, Serap Ustaoğlu, Recep Bi̇rcan

Turkish Journal of Veterinary & Animal Sciences

TAOĞLU, Recep BİRCAN Ondokuz Mayıs Üniversitesi, Sinop Su Ürünleri Fakültesi, Sinop - TÜRKİYE Abtract: In the research, rainbow trout with a mean weight of 123 g were fed 1.5-1.8% (I. group) and 2.25-2.7% (II. group) of the body weight and adlibitum (III. group), respectively to investigate the effects of different feeding rates on growth and feed con-version. At the end of the experiment, final average weights of 411.3±10.08 g, 484.2±14.23 g and 513.5±14.93 g, have been obtained, respectively. The difference between the I. group and II. group, and also the I. group and III. group was found significant (p0.05) according …


Histological Investigation On The Stuructural Aspects Of Adult Brown Bears' Ovary, Nesrin Özfi̇li̇z Jan 1998

Histological Investigation On The Stuructural Aspects Of Adult Brown Bears' Ovary, Nesrin Özfi̇li̇z

Turkish Journal of Veterinary & Animal Sciences

This study was made to investigate the structure of the ovaries of adult Brown bears which were brought to the Wildlife Research Centre (WRC) in Bursa. Ovaries obtained by laparoscopic surgery method, were divided into two pieces and fixated in buffered formalin. The 10-15 µ cryostat sections were stained with Oilred O stain method. The 5-7 µ sections cut from paraffin blocks stained with Crossmon's triple stain, Gomori's silver stain, Pinkus' orcein-giema stain and Mc Manus' periodic acide schiff (PAS) technique. The shapes of ovaries were observed as ovoid by ultrasonografi device. In the histological examinations, it was composed of …


The Effect Of Various Cemen Mixtures On The Quality Of Pastrami I:Chemical And Organoleptic Quality, Mustafa Ni̇zamlioğlu, Yusuf Doğruer, Ümit Gürbüz, Semra Kayaardi Jan 1998

The Effect Of Various Cemen Mixtures On The Quality Of Pastrami I:Chemical And Organoleptic Quality, Mustafa Ni̇zamlioğlu, Yusuf Doğruer, Ümit Gürbüz, Semra Kayaardi

Turkish Journal of Veterinary & Animal Sciences

This investigation has been done the effect of various cemen paste mixtures on the chemical and organoleptic quality of pastrami. The pastramies which were prepared experimentally have been mixed with the various cemen pastes and the effects of these mixtures on the chemical and organoleptic properties of pastramies were investigated on the Ist, 7th, 15th, 30th and 60th days. While the humidity of pastramies samples was 45.08-48.63% on the first day, and between 21.68-24.18% on the 60th day. Remarkable differences have been found between the groups in the amount of humidity of samples according to cemen flour and garlic ratios …


The Coccidia Of The Gallinaceous Birds In Azerbaijan, Musa Musaev, Gamida Gaibova, Galiba Ismailova, Farida Alieva, Naila Iskenderova Jan 1998

The Coccidia Of The Gallinaceous Birds In Azerbaijan, Musa Musaev, Gamida Gaibova, Galiba Ismailova, Farida Alieva, Naila Iskenderova

Turkish Journal of Veterinary & Animal Sciences

In this study the data on the coccidia of gallinaceous birds in Azerbaijan were presented. Chickens and pheasants have already been examined earlier concerning the presence of Eimeria and Isospora. Peacocks and quails are studied in this aspect for the first time. The examination of the gallinaceous birds concerning the presence of crytosporidia oocysts has been also carried out for the first time. The results obtained are indicative of the presence of a few coccidian species in the gallinaceous birds which have not been detected in Azerbaijan before.


Effects Of Selection For High Body Weight And Age Of Hen Onegg Characteristics In Japanese Quail (Coturnix Coturnix Japonica), Özge Altan, İsmail Oğuz, Yavuz Akbaş Jan 1998

Effects Of Selection For High Body Weight And Age Of Hen Onegg Characteristics In Japanese Quail (Coturnix Coturnix Japonica), Özge Altan, İsmail Oğuz, Yavuz Akbaş

Turkish Journal of Veterinary & Animal Sciences

The present study was conductud on qualis ( Coturnix coturnix japonica) to evaluate the effects of line and age of bird on egg characteristics. Total ninety Japanese quail from unselected (C) and selected (S) for high 4-week body weight for five generations were used. All birds were weighed individually at 10, 14 and 18-week of age and egg characteristics were obtained on all eggs collected during these weeks. The results showed that egg weight was increased by selection for high 4-week body weight and egg weight differences between the lines was due to increases in yolk and albumen weight of …


Ventricular Fibrillation Induced By Thiopental Sodium During Anesthesia In A Dog, Zülfikar Saritaş, Perran Gökçe, Bahattin Koç Jan 1998

Ventricular Fibrillation Induced By Thiopental Sodium During Anesthesia In A Dog, Zülfikar Saritaş, Perran Gökçe, Bahattin Koç

Turkish Journal of Veterinary & Animal Sciences

In this case report, a sudden devoloped ventricular fibrillation following Pentothal anaesthesia in a dog and the treatment done was subjected. No abnormal findings were detected according to haemotologic and biochemical tests and ECG obtained at the preoperative period. Blood gases analysis and ECG monitoring were performed before anaesthesia induction for this experimental surgery. After the case was premedicated with Xylazine hydrochlorid (2mg/kg im), anaesthesia was induced by pentothal (Thiopental sodium 15 mg/kg iv). Following respiratoric depression, the dog was entubated and connected to the volume respiratory device. The dog was ventilated with 40% oxygene-air mixture 16 per minute. At …


Body And Nutritional Composition Of Tilapia (Tilapia Ssp.) From The Southern Seyhan River, Suat Di̇kel, Mehmet Çeli̇k Jan 1998

Body And Nutritional Composition Of Tilapia (Tilapia Ssp.) From The Southern Seyhan River, Suat Di̇kel, Mehmet Çeli̇k

Turkish Journal of Veterinary & Animal Sciences

Nutritional composition and edible part of carcass of tilapia caught from the Southern Seyhan River were investigated in this study. The results showed that edible part of carcass of male and female tilapia were 52.8±1.34% and 51.4±0.57%, respec-tively. Dry matter of carcass was 21.8±0.08% whereas water content was 78.2±0.08%. Crude protein, crude fat and crude ash were2.66±0.75%, 12.16±0.74% and 5.18±0.02%, respectively.


Density, Distribution, And Habitat Of Flammulated Owls In Idaho, Craig Groves, Terry Frederick, Glenn Frederick, Eric Atkinson, Melonie Atkinson, Jay Shepherd, Gregg Servheen May 1997

Density, Distribution, And Habitat Of Flammulated Owls In Idaho, Craig Groves, Terry Frederick, Glenn Frederick, Eric Atkinson, Melonie Atkinson, Jay Shepherd, Gregg Servheen

Great Basin Naturalist

From 1990 to 1992 we surveyed for Flammulated Owls (Otus flammeolus) in 3 areas in Idaho: Salmon National Forest (SNF), Payette National Forest and adjacent Hells Canyon National Recreation Area (PNF-HCNRA), and Nez Perce National Forest (NPNF). We also collected and summarized information on all historic and modern records of Flammulated Owls in Idaho. Flammulated Owls were detected on 65% of 68 routes (2–16 km in length) surveyed at densities ranging from 0.04 to 1.25 singing males/40 ha. Owls were detected on survey routes as early as 10 May and as late as 23 July. Mean percent canopy …


Erratum May 1997

Erratum

Great Basin Naturalist

No abstract provided.


Diplostomiasis In Native And Introduced Fishes From Yellowstone Lake, Wyoming, Victor H. Inchausty, Michael Foutz, Richard A. Heckmann, Claudete Ruas, Paulo Ruas May 1997

Diplostomiasis In Native And Introduced Fishes From Yellowstone Lake, Wyoming, Victor H. Inchausty, Michael Foutz, Richard A. Heckmann, Claudete Ruas, Paulo Ruas

Great Basin Naturalist

Totals of 101 native Yellowstone cutthroat (Oncorhynchus clarki bouvieri), 27 introduced lake trout (Salvelinus namaycush), and 40 introduced longnose sucker (Catostomus catostomus) from Yellowstone Lake, Wyoming, USA, were examined for eye flukes. Metacercariae of the trematode fluke Diplostomum were in vitreous humor and/or lens of 94% of Yellowstone cutthroat trout, 92% of lake trout, and 78% of longnose sucker. Longnose sucker had 7% prevalence of infection in both lens and vitreous humor of metacercariae, while Yellowstone cutthroat trout had 3% and lake trout 8%. Diplostomum spathaceum was in lens tissue of 5% of infected …


Natural Variability Of Vegetation, Soils, And Physiography In The Bristlecone Pine Forest Of The Rocky Mountains, Brigitte M. Ranne, William L. Baker, Tom Andrews, Michael G. Ryan Mar 1997

Natural Variability Of Vegetation, Soils, And Physiography In The Bristlecone Pine Forest Of The Rocky Mountains, Brigitte M. Ranne, William L. Baker, Tom Andrews, Michael G. Ryan

Great Basin Naturalist

Pinus aristata Engelm. forest vegetation in Colorado was studied to determine vegetation composition and the relationship between vegetation and environment. Species percent cover, tree size class, and environmental variables were recorded for 49 plots. Previously collected data for 4 plots from New Mexico were included. Environmental variables included latitude, longitude, elevation, slope, aspect, topographic position, parent material, percent rock cover, mean rock size, litter depth, estimated plot age class, and evidence of anthropogenic disturbance. Soils were analyzed for texture, depth, and percent carbon and nitrogen. Pinus aristata foliage was analyzed for percent nitrogen and phosphorus. Direct and indirect gradient analyses …


An Immunomodulating Mycotoxin Interferes With The Development Of Autoimmune Diabetes In Diabetes-Prone Bb/Wor Rats, Honggang Liu Jan 1997

An Immunomodulating Mycotoxin Interferes With The Development Of Autoimmune Diabetes In Diabetes-Prone Bb/Wor Rats, Honggang Liu

Theses, Dissertations and Capstones

Various fungal products have immunomodulating activity and some have been studied regarding prevention of transplantation rejection. Prior to this investigation, the mycotoxin, gliotoxin (GT), has never been investigated as an immunotherapeutic drug for autoimmune disease. GT is a fungal secondary metabolite and a member of the epipolythiodioxopiperazine (ETP) family which has been shown to inhibit phagocytosis, induction of cytolytic T cells and the proliferation of T cells following mitogen stimulation. GT also induces in vitro apoptosis in certain immune cell types. More importantly, GT exhibits selective activity towards cells of hemopoietic origin.

Autoimmune diseases are disorders caused by immune responses …


Acyclic Phosphonomethylether Nucleosideinhibitors Of Respiratory Viruses, Dale L. Barnard, N. Bischofberger, C. U. Kim, J. H. Huffman, R. W. Sidwell, J. P. Dougherty, W. Lew, M. A. Williams, W. Yang Jan 1997

Acyclic Phosphonomethylether Nucleosideinhibitors Of Respiratory Viruses, Dale L. Barnard, N. Bischofberger, C. U. Kim, J. H. Huffman, R. W. Sidwell, J. P. Dougherty, W. Lew, M. A. Williams, W. Yang

Animal, Dairy, and Veterinary Science Faculty Publications

A series of acyclic phosphonomethylether nucleosides were synthesized and then evaluated for inhibitory activity against respiratory viruses of clinical significance using CPE inhibition, neutral red uptake and virus yield reduction assays. Of the 20 compounds synthesized, none significantly inhibited influenza A or B viruses or respiratory syncytial virus strains A2, Long or 18537; the selective indices (SI) were less than 10. A new compound, GS-2128 (2R, 5R-9-[2,5-dihydro-5-(phosphonomethoxy)-2-furanyl]adenine; D4API), selectively inhibited adenovirus 5 (SI>10) as did GS-0577 (9-(3-hydroxy-2-phosphonylmethoxypropyl)-adenine; HPMPA) and GS-0504 [(S)-1-[3-hydroxy-2-(phosphonylmethoxypropyl)]-cytosine; HPMPC]. The 50% effective concentrations (EC50) ranged from 8-100 μg mL-1 and 50% cell inhibitory concentrations (CC50) from …


The Effect On Feeding And Wheel Running Behaviours Of Housing Rats In Pairs, Roison M. O'Connor Jan 1997

The Effect On Feeding And Wheel Running Behaviours Of Housing Rats In Pairs, Roison M. O'Connor

Theses and Dissertations (Comprehensive)

The effects on feeding of moving animals from individual- to pair-housing were explored in the present three experiments. Wheel access is known to result in a temporary suppression of feeding. The move to pair-housing was compared with the effect of wheel access. In Experiment l, a group of rats was moved from individual to pair-housing (IP group) and compared to a group of individually-housed rats (IND group) and a group of chronically pair-housed rats (PAIR group). The animals in the IP group showed a temporary (three days) suppression in feeding (initially 23%). When half of the IND and PAIR group …


Bovine Mastitis Pathogens In New York Andpennsylvania: Prevalence And Effects On Somatic Cell Count And Milk Production, David J. Wilson, R. N. Gonzalez, H. H. Das Jan 1997

Bovine Mastitis Pathogens In New York Andpennsylvania: Prevalence And Effects On Somatic Cell Count And Milk Production, David J. Wilson, R. N. Gonzalez, H. H. Das

Animal, Dairy, and Veterinary Science Faculty Publications

Milk samples were collected from 108,312 dairy cows during 1601 farm visits made between January 1991 and June 1995. The herd visits were made by personnel from the Central Laboratory of the Quality Milk Promotion Services at Cornell University (Ithaca, NY) to farms located in central New York and northern Pennsylvania. Dairy Herd Improvement Association records were available for 32,978 cows in 327 herds. Intramammary infections, as defined by positive milk cultures, were present in 48.5% of all cows and in 36.3% of cows in herds enrolled in the Dairy Herd Improvement Association. Over 75% of the intramammary infections were …


Helminths Of The Southwestern Toad, Bufo Microscaphus, Woodhouse's Toad, Bufo Woodhousii (Bufonidae), And Their Hybrids From Central Arizona, Stephen R. Goldberg, Charles R. Bursey, Keith B. Malmos, Brian K. Sullivan, Hay Cheam Nov 1996

Helminths Of The Southwestern Toad, Bufo Microscaphus, Woodhouse's Toad, Bufo Woodhousii (Bufonidae), And Their Hybrids From Central Arizona, Stephen R. Goldberg, Charles R. Bursey, Keith B. Malmos, Brian K. Sullivan, Hay Cheam

Great Basin Naturalist

The gastrointestinal tracts, lungs, and urinary bladders from 77 Bufo microscaphus, 61 Bufo woodhousii, and 8 of their hybrids were examined for helminths. One species of trematode (Glypthelmins quieta), 1 species of cestode (Distoichometra bufonis), and 5 species of nematodes (Aplectana incerta, A. itzocanensis, Rhabdias americanus, Physaloptera sp., and Physocephalus sp.) were found. The greatest prevalence (41%) and mean intensity (231.7) were recorded for Aplectana incerta in Bufo woodhousii. It appears hybrids harbor fewer parasites than either parent species.


Oochoristica Scelopori (Cestoda: Linstowiidae) In A Grassland Population Of The Bunch Grass Lizard, Sceloporus Scalaris (Phrynosomatidae), From Arizona, Stephen R. Goldberg, Charles R. Bursey, Chris T. Mcallister, Hobart M. Smith, Quynh A. Truong Apr 1996

Oochoristica Scelopori (Cestoda: Linstowiidae) In A Grassland Population Of The Bunch Grass Lizard, Sceloporus Scalaris (Phrynosomatidae), From Arizona, Stephen R. Goldberg, Charles R. Bursey, Chris T. Mcallister, Hobart M. Smith, Quynh A. Truong

Great Basin Naturalist

No abstract provided.


Effects Of Douglas-Fir Foliage Age Class On Western Spruce Budworm Oviposition Choice And Larval Performance, Kimberly A. Dodds, Karen M. Clancy, Kathryn J. Leyva, David Greenberg, Peter W. Price Apr 1996

Effects Of Douglas-Fir Foliage Age Class On Western Spruce Budworm Oviposition Choice And Larval Performance, Kimberly A. Dodds, Karen M. Clancy, Kathryn J. Leyva, David Greenberg, Peter W. Price

Great Basin Naturalist

The western spruce budworm (Choristoneura occidentalis Freeman) prefers to feed on flushing buds and current-year needles of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco). Budworm larvae will not typically consume older age classes of needles unless all current-year foliage is depleted. We tested the following null hypotheses: (1) budworm larvae can feed on foliage with a wide range of qualities (i.e., current 1-, 2-, or 3-year-old needles) without measurable effects on fitness; and (2) budworm adults do not show any oviposition preference linked to the age of the foliage they fed on as larvae. We used both laboratory and field …


Selecting Wilderness Areas To Conserve Utah's Biological Diversity, Diane W. Davidson, William D. Newmark, Jack W. Sites Jr., Dennis K. Shiozawa, Eric A. Rickart, Kimball T. Harper, Robert B. Keiter Apr 1996

Selecting Wilderness Areas To Conserve Utah's Biological Diversity, Diane W. Davidson, William D. Newmark, Jack W. Sites Jr., Dennis K. Shiozawa, Eric A. Rickart, Kimball T. Harper, Robert B. Keiter

Great Basin Naturalist

Congress is currently evaluating the wilderness status of Bureau of Land Management (BLM) public lands in Utah. Wilderness areas play many important roles, and one critical role is the conservation of biological diversity. We propose that objectives for conserving biodiversity on BLM lands in Utah be to (1) ensure the long-term population viability of native animal and plant species, (2) maintain the critical ecological and evolutionary processes upon which these species depend, and (3) preserve the full range of communities, successional stages, and environmental gradients. To achieve these objectives, wilderness areas should be selected so as to protect large, contiguous …


Use Of The (3)H-Tetracycline Rat Model In The Study Of Skeletal Compartmentalization And Metabolism Of Calcium In The Maturing Male And Female Rat And The Role Of The Skeleton In Calcium Homeostasis In The Adolescent Male Rat, Darrin Lee Demoss Jan 1996

Use Of The (3)H-Tetracycline Rat Model In The Study Of Skeletal Compartmentalization And Metabolism Of Calcium In The Maturing Male And Female Rat And The Role Of The Skeleton In Calcium Homeostasis In The Adolescent Male Rat, Darrin Lee Demoss

Theses, Dissertations and Capstones

The (3)H-tetracycline bone labeling procedure was employed to monitor bone resorption from urinary loss curves in male and female rats of various ages. In addition, whole body dry skeletal mass and the loss of (3)H-tetracycline from individual bones was determined. It was found that the dry skeletal mass/body mass ratio of 24-week-old females was 30-40% greater than that for males. The urinary loss of (3)H-tetracycline was described by a double exponential equation indicating the presence of two distinct and independent exchangeable bone compartments. Both compartments decrease in size with age, but their label loss activities were different. The label loss …


Regulation Of Melanogenesis In B16 Mouse Melanoma Cells By Protein Kinase C (Pkc), Harish Mahalingam Jan 1996

Regulation Of Melanogenesis In B16 Mouse Melanoma Cells By Protein Kinase C (Pkc), Harish Mahalingam

Theses, Dissertations and Capstones

The pigment cell-specific expression of tyrosinase and TRP1 has been shown to be important for the production of melanin in pigmented cells. Using a pigmented cell line, B16 mouse melanoma, we obtained evidence that PKC plays a major role in regulating melanogenesis. Chronic treatment with phorbol dibutyrate (PDBu) leads to downregulation of PKC activity and protein levels. This is accompanied by a loss of pigmentation which is correlated with a 50% reduction and a complete loss of TRP1 and tyrosinase respectively. Similar results were obtained with Northern and Western blotting indicating that PKC may regulate the steady state levels of …