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2014

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Articles 7021 - 7050 of 7603

Full-Text Articles in Life Sciences

The Effects Of Beaver Dams On The Structure And Function Of Invertebrate Communities In A Southeastern Coastal Plain Stream, Damon L. Mullis Jan 2014

The Effects Of Beaver Dams On The Structure And Function Of Invertebrate Communities In A Southeastern Coastal Plain Stream, Damon L. Mullis

College of Graduate Studies: Theses & Dissertations

Beaver were at the brink of extinction in the early 20th century, but over the past century populations have been rebounding. This increase in range and population size has raised new concerns over possible impacts on aquatic ecosystems. Beaver are considered ecosystem engineers because they change the physical structure of aquatic systems through the construction of dams, which turn naturally flowing sections of rivers and streams into standing water. Such changes are known to influence habitat heterogeneity, influence organic matter transport and storage, and consequentially influence biological diversity. To my knowledge, no studies of the effects of beaver impoundments …

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Effects Of Organic And Conventional Agricultural Practices On Soil Microbial Communities And Molecular Detection Of Soil Borne Disease, Holli K. Milner Jan 2014

Effects Of Organic And Conventional Agricultural Practices On Soil Microbial Communities And Molecular Detection Of Soil Borne Disease, Holli K. Milner

College of Graduate Studies: Theses & Dissertations

Agricultural practices affect soil microbial communities and health through the input of pesticides, herbicides, fertilizers, and cycling of crop rotation. By examining the microbial community structure, we analyzed how microbial species respond to the environment that individual farms create. Early detection of soil borne disease is essential for agricultural success. However, monitoring incidence of disease based on plant growth response to pathogenic inoculation may not reveal the amount of pathogenic DNA in soil. A comparative study of tomato production systems was conducted by analysis of soil microbial community structure from four farms in Southeast Georgia for the years 2012 and …

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Integrated Decision Support For Sustainable And Profitable Land Management In The Lowlands Of Central Asia, Nodir Djanibekov, Rolf Sommer Jan 2014

Integrated Decision Support For Sustainable And Profitable Land Management In The Lowlands Of Central Asia, Nodir Djanibekov, Rolf Sommer

All Peer-Reviewed Publications

Land use and crop production in the Khorezm region in western Uzbekistan, exemplarily for the irrigated lowlands of Central Asia, are challenged by the excessive, non-sustainable use of irrigation water and repeated water shortages on one hand, and soil degradation by secondary salinization on the other hand. One of the research objectives of the German-Uzbek Khorezm project, funded by the German Ministry for Education and Research (BMBF) and led by Center of Development Research (ZEF) of Bonn University, was to better understand options for land use and choice of technology at the farm level in order to evaluate and propose …

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Biology Of The Coconut Bug, Pseudotheraptus Wayi, On French Beans, James Peter Egonyu, Sunday Ekesi, Jacques Kabaru, Lucy Irungu Jan 2014

Biology Of The Coconut Bug, Pseudotheraptus Wayi, On French Beans, James Peter Egonyu, Sunday Ekesi, Jacques Kabaru, Lucy Irungu

All Peer-Reviewed Publications

The coconut bug, Pseudotheraptus wayi Brown (Heteroptera: Coreidae), is a major pest of a wide range of economically important crops in Eastern and Southern Africa. The suitability of French beans, Phaseolus vulgaris L. (Fabales: Fabaceae) as an alternative food for mass rearing of P. wayi was determined by elucidating its development, survival, and reproduction on French bean pods in the laboratory. Development and survival of immatures on French beans was comparable to what is reported with two hosts previously used for rearing this species, namely coconut and cashew. Adults survived thrice longer and laid almost twice more eggs on the …

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Triple Bag Hermetic Storage Delivers A Lethal Punch To Prostephanus Truncatus (Horn) (Coleoptera: Bostrichidae) In Stored Maize, A. W. Njoroge, H. D. Affognon, C. M. Mutungi, J. Manono, P. O. Lamuka, L. L. Murdock Jan 2014

Triple Bag Hermetic Storage Delivers A Lethal Punch To Prostephanus Truncatus (Horn) (Coleoptera: Bostrichidae) In Stored Maize, A. W. Njoroge, H. D. Affognon, C. M. Mutungi, J. Manono, P. O. Lamuka, L. L. Murdock

All Peer-Reviewed Publications

Clean shelled maize was stored in woven polypropylene (PP) or triple layer polyethylene (PICS™) bags in the presence of Prostephanus truncatus Horn (PP1; PICS1) or absence of it (PP0; PICS0) at ambient conditions for six months. Moisture content, live insect population, grain damage, weight loss, and germination were analyzed on a monthly basis. Temperature and relative humidity in both PICS- and PP-bag setups were monitored, as well as the oxygen and carbon dioxide levels in the PICS bags. Overall, maize stored in PICS bags had significantly lower (P<0.05) moisture content than maize stored in PP bags. Storage in PICS bag slowed growth of P.truncatus populations and blocked infestation from the surrounding storage environment. On the contrary, PP bags permitted profuse build-up of insect population and cross-infestation. At six months, grain damage was 0.0%, 3.4%, 50.5% and 73.9%, corresponding to weight loss of 0.0%, 2.0%, 36.3%, and 47.7% in PICS0, PICS1, PP0 and PP1, respectively. Germination of maize stored in PP bags dropped from 91.1% to 37.0% and 12.7% in PP0 and PP1, respectively, whereas germination of maize stored in PICS bags dropped only marginally and reached 78.1% and 71.0% in PICS0 and PICS1, respectively, in six months. Without extreme loss of grain viability, a huge decrease in insect infestation, grain damage and weight loss is achieved by storing maize in PICS bag even under P.truncatus endemic conditions. © 2014 Elsevier Ltd.

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Odorant And Gustatory Receptors In The Tsetse Fly Glossina Morsitans Morsitans, George F.O. Obiero, Paul O. Mireji, Steven R.G. Nyanjom, Alan Christoffels, Hugh M. Robertson, Daniel K. Masiga Jan 2014

Odorant And Gustatory Receptors In The Tsetse Fly Glossina Morsitans Morsitans, George F.O. Obiero, Paul O. Mireji, Steven R.G. Nyanjom, Alan Christoffels, Hugh M. Robertson, Daniel K. Masiga

All Peer-Reviewed Publications

Tsetse flies use olfactory and gustatory responses, through odorant and gustatory receptors (ORs and GRs), to interact with their environment. Glossina morsitans morsitans genome ORs and GRs were annotated using homologs of these genes in Drosophila melanogaster and an ab initio approach based on OR and GR specific motifs in G. m. morsitans gene models coupled to gene ontology (GO). Phylogenetic relationships among the ORs or GRs and the homologs were determined using Maximum Likelihood estimates. Relative expression levels among the G. m. morsitans ORs or GRs were established using RNA-seq data derived from adult female fly. Overall, 46 and …

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Evaluation Of Acaricide-Treated String Curtains For Control Of Two-Spotted Spider Mite Tetranychus Urticae Koch (Acari: Tetranychidae) On Greenhouse Roses And Impact Of The String Curtain On The Predatory Mite Phytoseiulus Persimilis Athias-Henriot (Acari: Phytoseiidae), Emilie M. Deletre, Romain Bonafos, Thibaud Martin Jan 2014

Evaluation Of Acaricide-Treated String Curtains For Control Of Two-Spotted Spider Mite Tetranychus Urticae Koch (Acari: Tetranychidae) On Greenhouse Roses And Impact Of The String Curtain On The Predatory Mite Phytoseiulus Persimilis Athias-Henriot (Acari: Phytoseiidae), Emilie M. Deletre, Romain Bonafos, Thibaud Martin

All Peer-Reviewed Publications

Foliar sprays of pesticides are frequently used to control two-spotted mites on rose flowers, but these also destroy predatory mites and pose a high risk of contamination for humans and the environment. Using a novel approach to avoid spray applications on rose plants, modified acaricide-treated string curtains were adapted to control the pest. Two main aims of this study were: (i) to identify the lethal concentration of string curtains treated with propargite, dicofol, flufenoxuron, acrinathrin or tau-fluvalinate (τ-fluvalinate) on Tetranychus urticae, and (ii) to test the design (feasibility) and efficiency of the string curtains to trap the phytophagous mites on …

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A Retrospective Study Of Cardiac Hemangiosarcoma In Dogs, Agnieszka Noszczyk-Nowak, Marcin Nowak, Urszula Paslawska, Alicja Cepiel, Adrian Janiszewski, Maciej Staszczyk, Jozef Nicpon Jan 2014

A Retrospective Study Of Cardiac Hemangiosarcoma In Dogs, Agnieszka Noszczyk-Nowak, Marcin Nowak, Urszula Paslawska, Alicja Cepiel, Adrian Janiszewski, Maciej Staszczyk, Jozef Nicpon

Turkish Journal of Veterinary & Animal Sciences

Cardiac tumors account for a small proportion of all canine tumors, but hemangiosarcoma represents the most frequent cardiac tumor in many species. Hemangiosarcoma occur intrapericardially with pericardial effusion. In this case report, a retrospective study was conducted on 9 cases of canine hemangiosarcoma. In all the dogs the presence of a pericardial exudate was noted and in 5 cases it was the only lesion detected during the examination. All animals were subjected to necropsy and histopathology was performed in the heart, spleen, liver, kidney, and lung. In 5 cases the tumor was present exclusively in the atrial wall. In 4 …

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Fatty Acid Profile In 4 Types Of Fat Depots In Polish Holstein-Friesian And Limousine × Polish Holstein-Friesian Bulls, Monika Sobczuk-Szul, Zenon Nogalski, Zofia Wielgosz-Groth, Magdalena Mochol, Arkadiusz Rzemieniewski, Paulina Pogorzelska-Przybylek, Cezary Purwin Jan 2014

Fatty Acid Profile In 4 Types Of Fat Depots In Polish Holstein-Friesian And Limousine × Polish Holstein-Friesian Bulls, Monika Sobczuk-Szul, Zenon Nogalski, Zofia Wielgosz-Groth, Magdalena Mochol, Arkadiusz Rzemieniewski, Paulina Pogorzelska-Przybylek, Cezary Purwin

Turkish Journal of Veterinary & Animal Sciences

The aim of this study was to determine the fatty acid profile in 4 types of fat deposits in Polish Holstein-Friesian (PHF) and Limousine × Polish Holstein-Friesian (LM × PHF) bulls. The experimental materials included samples of intramuscular, intermuscular, subcutaneous, and internal fat collected from the carcasses of 28 PHF bulls and 26 LM × PHF bulls. Determined fatty acids (FAs) were divided into saturated (SFAs) and unsaturated (UFAs) FAs, including monounsaturated (MUFAs) and polyunsaturated (PUFAs) FAs. The UFA/SFA, MUFA/SFA, PUFA/SFA, and PUFA n-6/PUFA n-3 ratios were calculated. Internal fat was characterized by the highest SFA concentrations, and subcutaneous fat …

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Polymorphism Of The Ovine Calpastatin Gene In Some Turkish Sheep Breeds, Onur Yilmaz, Tamer Sezenler, Nezi̇h Ata, Yalçin Yaman, İbrahi̇m Cemal, Orhan Karaca Jan 2014

Polymorphism Of The Ovine Calpastatin Gene In Some Turkish Sheep Breeds, Onur Yilmaz, Tamer Sezenler, Nezi̇h Ata, Yalçin Yaman, İbrahi̇m Cemal, Orhan Karaca

Turkish Journal of Veterinary & Animal Sciences

The calpastatin (CAST) gene has a major effect on muscle growth and meat tenderness after slaughter; it is located on the fifth chromosome in sheep. Blood samples were collected from 720 animals in total from Kıvırcık (KIV), Sakız (SZ), Karacabey Merino (KM), and Gökçeada (GA) sheep populations raised in West Anatolia. The PCR products were digested by the restriction endonuclease MspI. Allele frequencies for M and N alleles of the gene were found to be 0.85 and 0.15 in KIV, 0.80 and 0.20 in KM, 0.99 and 0.01 in GA, and 0.34 and 0.66 in SZ sheep, respectively. It was …

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Immunohistochemical Localization Of Glutathione Peroxidase 1 Enzyme And Its Gene Expression By Rt-Pcr In The Liver Tissue Of Healthy And Diabetic Mice, Turgay Deprem, Nurhayat Gülmez Jan 2014

Immunohistochemical Localization Of Glutathione Peroxidase 1 Enzyme And Its Gene Expression By Rt-Pcr In The Liver Tissue Of Healthy And Diabetic Mice, Turgay Deprem, Nurhayat Gülmez

Turkish Journal of Veterinary & Animal Sciences

The purpose of this study is to examine the gene expression level of glutathione peroxidase 1 (GPx1) in the liver of healthy and diabetic mice, its localization in the tissue, and structural changes in the liver. In this study, 36 Swiss albino mice were divided into 3 groups: experimental (diabetic) (n = 15), sham (n = 15), and control (n = 6). Streptozotocin (100 mg/kg) was intraperitoneally administered to mice in the experimental group. While the gene expression level of GPx1 was determined using the RT-PCR method, its localization in the liver was determined using an immunohistochemical method. The GPx1 …

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Effect Of Gamma Irradiation On Inactivation Of Ichthyophthirius Multifiliis Trophonts And Its Efficacy On Host Response In Experimentally Immunized Rainbow Trout (Oncorhynchus Mykiss), Marzieh Heidarieh, Maryam Hedayati Rad, Ali Reza Mirvaghefi, Adama Diallo, Shalaleh Mousavi, Najmeh Sheikhzadeh, Amir Ali Shahbazfar Jan 2014

Effect Of Gamma Irradiation On Inactivation Of Ichthyophthirius Multifiliis Trophonts And Its Efficacy On Host Response In Experimentally Immunized Rainbow Trout (Oncorhynchus Mykiss), Marzieh Heidarieh, Maryam Hedayati Rad, Ali Reza Mirvaghefi, Adama Diallo, Shalaleh Mousavi, Najmeh Sheikhzadeh, Amir Ali Shahbazfar

Turkish Journal of Veterinary & Animal Sciences

The present study was conducted to investigate the effects of gamma irradiation on Ichthyophthirius multifiliis trophonts and to determine the effects of exposure on inactivated parasites in rainbow trout. In the first trial, fish were treated with irradiated Ichthyophthirius multifiliis trophonts for 21 days. Results showed that irradiation at doses of 150 Gy and higher was required to inactivate Ichthyophthirius multifiliis trophonts. The LD50 value obtained was 52.2 Gy. In the second trial, the effects of irradiated Ichthyophthirius multifiliis trophonts on physiological and biochemical components of blood and mucus, as well as skin morphology, were studied for 30 days. Results …

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Response Of 2 Breeds Of Broiler Chicks To Experimental Infection With Low Dose Of Eimeria Tenella Sporulated Oocysts, Isa Danladi Jatau, Augustine Nnamadi Odika, Mathew Thlama, Ahmad Muhammad Talba, Muhammed Bisalla, Ibrahim Waziri Musa Jan 2014

Response Of 2 Breeds Of Broiler Chicks To Experimental Infection With Low Dose Of Eimeria Tenella Sporulated Oocysts, Isa Danladi Jatau, Augustine Nnamadi Odika, Mathew Thlama, Ahmad Muhammad Talba, Muhammed Bisalla, Ibrahim Waziri Musa

Turkish Journal of Veterinary & Animal Sciences

This study evaluated the effect of low-grade Eimeria tenella infections in broiler chicks of Cobb (C) and Marshal (M) breeds. Birds from the experimental group of each breed were orally infected with 3000 sporulated oocysts of E. tenella and examined for weight gain, feed conversion ratio (FCR), packed cell volume (PCV), total leukocyte count (WBC), total plasma protein (TP), gross lesion scores, and histopathological changes 10 days after infection. There were 31.7% and 15.7% reductions in the mean weight gain of experimental groups of C and M, respectively, compared to their controls; this was statistically significant (P < 0.05) in C but not (P > 0.05) in M. …

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Calving Assistance Influences The Occurrence Of Umbilical Cord Pathologies Treated Surgically In Calves, Carlos Moscuzza, Horacio Milicich, Guadalupe Alvarez, Betiana Gutierrez, Mariano Nahum Jan 2014

Calving Assistance Influences The Occurrence Of Umbilical Cord Pathologies Treated Surgically In Calves, Carlos Moscuzza, Horacio Milicich, Guadalupe Alvarez, Betiana Gutierrez, Mariano Nahum

Turkish Journal of Veterinary & Animal Sciences

Ninety-two umbilical pathologies were surgically treated in Holstein, Aberdeen Angus, and Polled Hereford calves, both males and females, whose ages ranged between 2 and 8 months. The pathology diagnosis was performed considering the main anatomical elements involved in the umbilical cord, the inflammation progression, and the macroscopic characteristics of injuries. The umbilical cord pathologies were related to calving characteristics. The proportion of affected umbilical cords in calves born via assisted calving (77%) was significantly higher than that observed in calves born from normal parturition. The umbilical cord pathology of highest occurrence was omphalophlebitis (53.2%). A considerable proportion of infectious diseases …

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Gallbladder Mucocele In A Dog: An Ultrasonography And Pathology Report, Marudhai Thangapandiyan, Ramasamy Sridhar, Kirubakaran Jeyaraja, Masilamani Sakthivelan, Thangaraj Mohanapriya, Natesan Pazhanivel Jan 2014

Gallbladder Mucocele In A Dog: An Ultrasonography And Pathology Report, Marudhai Thangapandiyan, Ramasamy Sridhar, Kirubakaran Jeyaraja, Masilamani Sakthivelan, Thangaraj Mohanapriya, Natesan Pazhanivel

Turkish Journal of Veterinary & Animal Sciences

A 9-year old male, German shepherd dog was presented to the Madras Veterinary College Teaching Hospital with a history of a chronic ailment that had increased over the previous few months. A diagnosis of chronic renal failure and hepatitis was made and abdominal ultrasonography revealed the presence of gallbladder mucocele (GBM). The etiology, diagnosis, necropsy, and histopathological lesions were discussed.

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Morphological And Morphometrical Characteristics Of The Interdigital Gland In Kivircik Sheep, Yasi̇n Demi̇raslan, Yalçin Akbulut, Turgay Deprem, Ebru Karadağ Sari, Kadi̇r Aslan Jan 2014

Morphological And Morphometrical Characteristics Of The Interdigital Gland In Kivircik Sheep, Yasi̇n Demi̇raslan, Yalçin Akbulut, Turgay Deprem, Ebru Karadağ Sari, Kadi̇r Aslan

Turkish Journal of Veterinary & Animal Sciences

The purpose of this study was to determine the morphological and morphometric characteristics of the interdigital gland in Kivircik sheep. The interdigital glands in the forefeet and hind feet of the 16 male Kivircik sheep were examined in terms of morphometric and morphological characteristics. Four lengths (length of duct and corpus, diameter of duct and corpus) and 2 angles (angle of internal and external flexure) were measured in the interdigital glands located between 2 digits after dissection. The interdigital gland contained orifice, excretory duct, flexure, and corpus sections. Lengths and widths of corpus and excretory ducts of the interdigital gland …

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Maternal Embryokines That Regulate Development Of The Bovine Preimplantation Embryo, Peter James Hansen, Anna Carolina Denicol, Kyle Bradley Dobbs Jan 2014

Maternal Embryokines That Regulate Development Of The Bovine Preimplantation Embryo, Peter James Hansen, Anna Carolina Denicol, Kyle Bradley Dobbs

Turkish Journal of Veterinary & Animal Sciences

Proper embryonic development depends upon regulatory signals from the reproductive tract called embryokines. This review uses the cow as a model to understand the developmental processes controlled by embryokines. The focus is on 3 embryokines that have been shown to increase competence of embryos to survive after transfer to recipients: CSF2, IGF1, and DKK1. Together, these molecules regulate key events required for development of the embryo to the blastocyst stage including proliferation (enhanced by IGF1), development of the inner cell mass (regulated by CSF2), control of differentiation (modified by DKK1), and inhibition of apoptosis and stress-mediated developmental arrest (IGF1 and …

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Polledness Intersex Syndrome In Goats – Molecular And Histological Aspects, Iwona Szatkowska, Daniel Zaborski, Witold Stanislaw Proskura, Sara Tabor Jan 2014

Polledness Intersex Syndrome In Goats – Molecular And Histological Aspects, Iwona Szatkowska, Daniel Zaborski, Witold Stanislaw Proskura, Sara Tabor

Turkish Journal of Veterinary & Animal Sciences

Polledness intersex syndrome (PIS) is a phenomenon associated with 2 distinct conditions occurring in goats, namely polledness and intersexuality. The first is a trait exhibiting complete dominance, whereas the latter is recessive. The extreme case of intersexualism is complete sex reversal, which is observed only in females (60,XX). The trait PIS is inherited in a recessive manner and caused by deletion of 11.7 kbp DNA on chromosome 1q43. Female goats with PIS exhibit a broad range of developmental abnormalities of the sexual system, from only subtle changes to complete sex reversal. The phenotypic diversity in goats with PIS is most …

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Application Of Dietary Fish Oil In Dairy Cow Reproduction, Anna Zwyrzykowska, Robert Kupczynski Jan 2014

Application Of Dietary Fish Oil In Dairy Cow Reproduction, Anna Zwyrzykowska, Robert Kupczynski

Turkish Journal of Veterinary & Animal Sciences

Feed fats are commonly used as a component of high-yielding cow diet rations. Many studies have been conducted on the effects of fat supplementation on metabolism, milk composition, and improvements in dairy cow reproduction. The positive effects on fat (vegetable oil) and energy supplementation on improvements in reproduction are well documented. Consumption of polyunsaturated fatty acids (PUFAs), including n-3 acids, in appropriate feed doses improves fertility of dairy cows. A fat source with high levels of acids such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) is marine oil, especially fish and algae. By modification of cow rations, EPA and …

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Molecular, Cellular, And Physiological Determinants Of Bull Fertility, Alexis Marie Parisi, Shannon Kate Thompson, Abdullah Kaya, Erdoğan Memi̇li̇ Jan 2014

Molecular, Cellular, And Physiological Determinants Of Bull Fertility, Alexis Marie Parisi, Shannon Kate Thompson, Abdullah Kaya, Erdoğan Memi̇li̇

Turkish Journal of Veterinary & Animal Sciences

Bull fertility, defined as the ability of the spermatozoon to fertilize and activate the ovum and then support embryonic and even fetal development, is a crucial factor influencing animal reproduction and production efficiency. Despite significant influences of fertility on herd genetic improvement and efficient cattle production, the mechanisms regulating this phenotype and reliable biomarkers associated with bull fertility are poorly defined. Specifically, there is a broad lack of knowledge in bull fertility. In this paper, bull fertility is reviewed within the context of animal systems physiology, and system biology markers associated with bull fertility are provided. This mini-review is intended …

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Cholesterol Efflux From Sperm: Approaches And Applications, Zahid Naseer, Ejaz Ahmad, Meli̇h Aksoy Jan 2014

Cholesterol Efflux From Sperm: Approaches And Applications, Zahid Naseer, Ejaz Ahmad, Meli̇h Aksoy

Turkish Journal of Veterinary & Animal Sciences

Following ejaculation, sperm appear morphologically mature, but functionally they are inactive. To attain functional capability or capacitation in vivo, sperm must reside in the female reproductive tract for a certain period of time before fertilization. In the female reproductive tract, cholesterol efflux from the sperm plasma membrane is considered vital for the initiation of capacitation. A number of in vitro studies have used biological and nonphysiological means to understand the phenomenon of cholesterol efflux and capacitation. In this review, we present a short overview of the role of cholesterol efflux in regulating sperm capacitation using various agents. This review provides …

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The Avian Ovary And Follicle Development: Some Comparative And Practical Insights, Alan L. Johnson Jan 2014

The Avian Ovary And Follicle Development: Some Comparative And Practical Insights, Alan L. Johnson

Turkish Journal of Veterinary & Animal Sciences

This review focuses on recent research related to the avian ovary and, in particular, cellular mechanisms mediating embryonic growth of the ovary, postembryonic follicular development, and the process of follicular selection. Attention is drawn to a variety of fundamental, yet unresolved, aspects of ovarian function, several of which are uniquely related to avian reproductive strategies. Some notable differences in ovarian function between birds and the most closely related extant group, the crocodilians, are illustrated. Moreover, because the sauropsid (reptilian and avian) and synapsid (mammalian) lineages diverged shortly after the emergence of amniotes some 340 million years ago, consideration is given …

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Endocrine And Metabolic Mechanisms Of Embryo And Fetal Intrauterine Growth Retardation In Dairy Cows, Anatoliy Nezhdanov, Sergey Shabunin, Vitaliy Mikhalev, Nikolay Klimov, Anton Chernitskiy Jan 2014

Endocrine And Metabolic Mechanisms Of Embryo And Fetal Intrauterine Growth Retardation In Dairy Cows, Anatoliy Nezhdanov, Sergey Shabunin, Vitaliy Mikhalev, Nikolay Klimov, Anton Chernitskiy

Turkish Journal of Veterinary & Animal Sciences

This research was conducted to study hormonal and metabolic statuses and to determine ultrasound criteria for early diagnosis of fetal growth retardation syndrome (FGRS) in dairy cows of Black-motley (n = 41) and Red-motley (n = 56) Holstein breeds. Concentrations of progesterone, testosterone, 17beta-estradiol, dehydroepiandrosterone sulfate, cortisol, and triiodothyronine in blood serum were assessed by immune-enzyme analysis. Concentrations of plasma L-ascorbic acid and nitrogen oxides, serum immune globulin, middle molecular peptides, and bactericidal and lysozyme activity were determined by spectrophotometry. On days 38-40 and 60-65 of gestation, FGRS in cows was associated with hypoprogesteronemia, decrease of adrenal and thyroid gland …

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The Effect Of Short-Term Lupin (Lupinus Angustifolius) Feed Supplementation On Serum Steroid Hormones, Insulin-Like Growth Factor I, And Ovarian Follicular Development And Atresia In Merino Ewes, Radoslava Vlckova, Jan Posivak, Igor Valocky, Zuzana Kravcova, Andrea Eibenová, Drahomia Sopkova Jan 2014

The Effect Of Short-Term Lupin (Lupinus Angustifolius) Feed Supplementation On Serum Steroid Hormones, Insulin-Like Growth Factor I, And Ovarian Follicular Development And Atresia In Merino Ewes, Radoslava Vlckova, Jan Posivak, Igor Valocky, Zuzana Kravcova, Andrea Eibenová, Drahomia Sopkova

Turkish Journal of Veterinary & Animal Sciences

The effects of short-term lupin supplementation on ovulation rate in ewes during oestrous season are well known. In this study, we tested the effects of an 8-day lupin supplementation on folliculogenesis during anoestrus applied over the hormonal treatment of ewes. Fourteen anoestrous Merino ewes were assigned into 2 groups (n = 7 for each) in which the control group was fed a basal diet and the experimental group was supplemented with lupin groats (500 g per head per day). Both groups were treated intramuscularly with 12.5 µg/head lecirelinum (luteinising hormone releasing hormone super analogue) on the first day of supplementation …

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Study Of Insulin-Like Growth Factor 1 Effects On Bovine Type A Spermatogonia Proliferation And Viability, Babak Qasemi Panahi, Parviz Tajik, Mansoureh Movahedin, Gholamali Moghaddam, Mohammad Hossein Geranmayeh Jan 2014

Study Of Insulin-Like Growth Factor 1 Effects On Bovine Type A Spermatogonia Proliferation And Viability, Babak Qasemi Panahi, Parviz Tajik, Mansoureh Movahedin, Gholamali Moghaddam, Mohammad Hossein Geranmayeh

Turkish Journal of Veterinary & Animal Sciences

Spermatogonial stem cells (SSCs) are the best candidates for exploitation in genetic improvement of cattle herds. In fact, SSCs transmit genetic information to future generations. In vitro improvement in proliferation and frozen-thawed SSCs numbers is therefore needed. In the present study, bovine SSCs were cocultured with Sertoli cells, with or without insulin-like growth factor 1 (IGF-1). During 16 days of incubation, 100 ng/mL IGF-1 showed higher efficacy in increasing the numbers and diameters of SSCs colonies than 40 and 150 ng/mL concentrations. Furthermore, 100 ng/mL IGF-1 increased the frozen/thawed cells’ viability rate. Overall, these data demonstrate that usage of 100 …

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Expression Of Vascular Endothelial Growth Factor And Hypoxia-Inducible Factor-1 Alpha During The Periovulatory Period In Goats, Chainarong Navanukraw, Jiratti Thammasiri, Tossapol Moonmanee, Jaruk Nutthakornkul Jan 2014

Expression Of Vascular Endothelial Growth Factor And Hypoxia-Inducible Factor-1 Alpha During The Periovulatory Period In Goats, Chainarong Navanukraw, Jiratti Thammasiri, Tossapol Moonmanee, Jaruk Nutthakornkul

Turkish Journal of Veterinary & Animal Sciences

To evaluate the expression of vascular endothelial growth factor (VEGF) and hypoxia-inducible factor-1 alpha (HIF-1 alpha) during the periovulatory period, goat ovaries were collected at 0, 4, 8, 12, 24, and 48 h after treatment with 300 IU hCG. Total cellular RNA was isolated and VEGF and HIF-1 alpha were quantified using real-time RT-PCR. The mRNA levels of VEGF in thecal tissue remained unchanged prior to ovulation. However, the mRNA levels of VEGF in thecal tissues at 48 h increased to 7.5-fold of the level at 0 h (P < 0.05). In granulosa tissue, the VEGF mRNA levels were not detected in granulosa cells at 48 h. In thecal tissue, the mRNA level of HIF-1 1 alpha at 4 h was 1.5-fold of the level at 0 h and remained unchanged during 8-24 h; however the levels were significantly increased at 48 h. The mRNA levels of HIF-1 alpha in granulosa at 4 h was not changed but levels were increased (P < 0.05) at 8 h and at 12 h and then decreased at 24 and 48 h, respectively. These data describe the relationships of VEGF- and HIF-1 alpha -dependent angiogenesis during the periovulatory periods by which hypoxia during ovulation is crucial for establishing the thecal new vasculature.

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Molecular Phylogenetic Relationships Of North American Dermacentor Ticks Using Mitochondrial Gene Sequences, Kayla L. Perry Jan 2014

Molecular Phylogenetic Relationships Of North American Dermacentor Ticks Using Mitochondrial Gene Sequences, Kayla L. Perry

College of Graduate Studies: Theses & Dissertations

Dermacentor is a recently evolved genus of hard ticks (Family Ixodiae) that includes 36 known species worldwide. Despite the importance of Dermacentor species as vectors of human and animal disease, the systematics of the genus remain largely unresolved. This study focuses on phylogenetic relationships of the eight North American Nearctic Dermacentor species: D. albipictus, D. variabilis, D. occidentalis, D. halli, D. parumapertus, D. hunteri, and D. andersoni, and the recently re-established species D. kamshadalus, as well as two of the Neotropical Dermacentor species D. nitens and D. dissimilis (both formerly Anocentor). We sequenced portions of the mitochondrial …

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Water And Nutrient Reuse Within Closed Hydroponic Systems, Emerson Christie Jan 2014

Water And Nutrient Reuse Within Closed Hydroponic Systems, Emerson Christie

College of Graduate Studies: Theses & Dissertations

Currently, little research exists on the maintenance of individual nutrient balance within the nutrient solutions of closed hydroponic systems and how this maintenance may result in reductions in water and nutrient consumption. In this study, a nutrient solution management procedure was developed to maintain outputs while minimizing inputs. Lactuca sativa (lettuce) crops were grown in six closed hydroponic systems utilizing the nutrient film technique. Electrical conductivity was used as the primary indicator of nutrient solution quality and determined if the nutrient solution was discarded and replaced (control systems) or restored (test systems). Restorations in test systems were made individually to …

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An Examination Of Behavioral And Temporal Consistency Of Pre-Performance Routines In Ncaa Division I Basketball Free Throw Shooting – A Naturalist Observational Investigation, Jacob Blumberg Jan 2014

An Examination Of Behavioral And Temporal Consistency Of Pre-Performance Routines In Ncaa Division I Basketball Free Throw Shooting – A Naturalist Observational Investigation, Jacob Blumberg

College of Graduate Studies: Theses & Dissertations

Research has shown that pre-performance routines positively influence performance of closed and self-paced skills (Boutcher & Crews, 1987; Cohn, 1990; Otto et al., 2011). Boutcher and Crews (1987) suggested that pre-performance routines improve performance by helping reduce anxiety along with helping athletes’ retain mental sharpness and focus. Furthermore, several quantitative studies have examined the influence of both behavioral and temporal consistency of pre-performance routines on the success of a skill, yielding inconsistent results (Boutcher & Crews, 1987; Lobmeyer & Wasserman, 1986; Lonsdale & Tam, 2008; Jackson, 2003). However, research examining this phenomenon from a qualitative and naturalistic observational perspective is …

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The Prevalence And Effect Of Wolbachia Infection On The Brown Widow Spider (Latrodectus Geometricus), Brittany Dane' Arrington Jan 2014

The Prevalence And Effect Of Wolbachia Infection On The Brown Widow Spider (Latrodectus Geometricus), Brittany Dane' Arrington

College of Graduate Studies: Theses & Dissertations

Wolbachia was recently identified in the Brown Widow Spider (Latrodectus geometricus). This symbiont has not previously been found in this genus, therefore the consequences on the host’s population dynamics are unknown. The frequency of endosymbiont infection can provide insight into the population dynamics of the host as this bacteria is known to alter host life history. In my 1st chapter I determine the prevalence of Wolbachia pipentis infection in in the Brown Widow Spider (Latrodectus geometricus) from five locations in the Southeastern United States. Infection frequency differed significantly among sampling locations, ranging from 20% to …

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