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Articles 14941 - 14970 of 21430
Full-Text Articles in Entire DC Network
Distribution And Population Characteristics Of Lower Walleye In The Eleven Point River, Arkansas, Ronald L. Johnson, S. D. Henry, Sam W. Barkley
Distribution And Population Characteristics Of Lower Walleye In The Eleven Point River, Arkansas, Ronald L. Johnson, S. D. Henry, Sam W. Barkley
Journal of the Arkansas Academy of Science
Walleye Sander vitreus (Mitchill) distributions and ecology have been poorly studied in southern river basins. We studied the longitudinal distribution and population characteristics of walleye in an unregulated river within the Ozark region of the U.S., the lower Eleven Point River, Arkansas, which has high species diversity. Walleye were collected in a 60 km segment of the river by daytime boat electrofishing over a three year period (2002-2004). Catch rates, growth rates and size structure were high relative to other streams studied in North America. Catch per effort ( = 5.2/h) was similar seasonally, spatially and among years. Proportional stock …
Food Habit Of Rana (Pelophylax) Kl. Esculenta Females In A New Recorded E-System Population From A Forested Habitat In North-Western Romania, Istvan Sas, Severus Daniel Covaciu Marcov, Alexandru Strugariu, Anamaria David, Cristina Ilea
Food Habit Of Rana (Pelophylax) Kl. Esculenta Females In A New Recorded E-System Population From A Forested Habitat In North-Western Romania, Istvan Sas, Severus Daniel Covaciu Marcov, Alexandru Strugariu, Anamaria David, Cristina Ilea
Turkish Journal of Zoology
This is the first record of a green frog Rana (Pelophylax) kl. esculenta population from the E-system in the north-western part of Romania. From April to July 2005 we analysed the trophic spectrum of 84 Rana kl. esculenta females, extracting and identifying a total number of 801 prey items. Beside animal preys, plant materials and remains of shed skin were identified in the stomach contents. We did not find any Rana kl. esculenta individuals with empty stomachs. The importance of different animal prey categories varied in certain periods of the study. In the stomach contents collected in July we identified …
Diversity Of Alticinae (Coleoptera, Chrysomelidae) In Kasnak Oak Forest Nature Reserve, Isparta, Turkey, Ebru Gül Aslan, Yusuf Ayvaz
Diversity Of Alticinae (Coleoptera, Chrysomelidae) In Kasnak Oak Forest Nature Reserve, Isparta, Turkey, Ebru Gül Aslan, Yusuf Ayvaz
Turkish Journal of Zoology
Different habitat types chosen from Kasnak Oak Forest Nature Reserve (Isparta, Turkey) and 3 plots with vegetation structure, were studied comparatively with Alticinae (Coleoptera, Chrysomelidae) species composition, its richness and abundance. The study was conducted between the months of April and October at 15-day intervals during 2005 and 2006. Sixty-six sets of data were obtained during the survey, including 22 samplings for each plot. A total of 2650 individuals belonging to 57 species were recorded from the chosen plots. Species richness estimators were used to measure the completeness of the inventories. Values predicted by different non-parametric estimators showed that further …
Changes In The Lake Ladik Fish Community (1972-2004) And Ichthyofauna Of Its Inlet And Outlet Streams (Samsun, Turkey), Selma Uğurlu, Nazmi̇ Polat, Şevket Kandemi̇r
Changes In The Lake Ladik Fish Community (1972-2004) And Ichthyofauna Of Its Inlet And Outlet Streams (Samsun, Turkey), Selma Uğurlu, Nazmi̇ Polat, Şevket Kandemi̇r
Turkish Journal of Zoology
This research was conducted to record the fish species inhabiting Lake Ladik and its inlet and outlet streams between July 2003 and August 2004. Electrofishing equipment, fishing cast net, fisherman's dip net, and fishing nets with different scales were used to catch fish samples. As a result of evaluated samples caught from the research area, 12 species belonging to 4 families (Cyprinidae, Balitoridae, Esocidae, and Percidae) were identified.
The Isolation And Characterization Of Bovine Adult Derived Adipose Stem Cells For The Use In Nuclear Transfer, Alicia A. Picou
The Isolation And Characterization Of Bovine Adult Derived Adipose Stem Cells For The Use In Nuclear Transfer, Alicia A. Picou
LSU Master's Theses
Since the cloning of Dolly there has been little change in the efficiency of nuclear transfer (NT). Research is beginning to investigate the characteristics of donor cells. Adiposetissue is an abundant source of adult-derived cells that have displayed “stemness” in-vitro(Gimble et al., 2003). The overall goal of this research was to define the in-vitro characteristicsof bovine adipose-derived adult stem cells (ADAS) for the use in NT. Isolation methods weredetermined by a 3 x 3 factorial design. 1 g of subcutaneous fat was collected and subjected to0.10%, 0.25% or 0.50% collagenase type I solution for 1, 2 and 3 h. Nucleated …
The Effect Of Zinc On L-Leucine Transport In Lobster Intestine, Anna Lynn Mullins
The Effect Of Zinc On L-Leucine Transport In Lobster Intestine, Anna Lynn Mullins
UNF Graduate Theses and Dissertations
The current study is a characterization of L-leucine absorption across the American lobster intestine in order to determine the likelihood of a bis-complex formation with zinc ([Leu]-Zn-[Leu]) as a possible substrate for PEPT1. This study required isolated lobster intestines to be mounted in a perfusion chamber in order to quantify 3H-L-leucine transport. It was hypothesized that an apical dipeptide transporter, PEPT1, was responsible for uptake of L-leucine via formation of a bis-complex with zinc ([Leu]-Zn-[Leu]) in the form of molecular mimicry, where the bis-complex mimics the normal dipeptide substrate of the proposed carrier system. It was found that L-leucine transport …
Great Curassow And Crested Guan Near Ciudad Victoria, Tamaulipas, Mexico, Timothy Brush
Great Curassow And Crested Guan Near Ciudad Victoria, Tamaulipas, Mexico, Timothy Brush
School of Integrative Biological & Chemical Sciences (Formerly Dept. of Biology)
Great Curassow (Crax rubra) and Crested Guan (Penelope purpurascens) were rediscovered in the Ciudad Victoria area of southwestern Tamaulipas, Mexico for the first time since 1909. Birds were found in low elevation canyons containing permanent running water, with riparian forest dominated by Montezuma bald-cypress (Taxodium mucronatum) and steep scrub-covered slopes. These records represent the northernmost known points of the ranges of both species. Additional field work will be needed to determine whether these small populations are isolated from the nearest known populations in the El Cielo/Gómez Farías area of southern Tamaulipas.
Heritability And Variance Component Estimates Of Meat Quality In Japanese Quail (Coturnix Coturnix Japonica), Yakut Gevrekçi̇, İsmai̇l Oğuz, Mustafa Akşi̇t, Alper Önenç, Demi̇r Özdemi̇r, Özge Altan
Heritability And Variance Component Estimates Of Meat Quality In Japanese Quail (Coturnix Coturnix Japonica), Yakut Gevrekçi̇, İsmai̇l Oğuz, Mustafa Akşi̇t, Alper Önenç, Demi̇r Özdemi̇r, Özge Altan
Turkish Journal of Veterinary & Animal Sciences
A comparison of 3 methods for variance component estimation to compute the heritability of meat quality characteristics (body weight, breast meat weight, breast yield, l, a, b, c, h, and ph) was performed using the methods of maximum likelihood (ML), restricted maximum likelihood (REML), and minimum variance quadratic unbiased estimator (MIVQUE). The parent population was set up at random from a closed population of Japanese quail (Coturnix coturnix japonica). Selection was not applied for any productive characteristics and no special care was taken to avoid inbreeding. After 12-h feed withdrawal, the birds were weighed and slaughtered at 35 days of …
Concentration Of Products Of Nitric Oxide Oxidation And Some Vitamins In Sheep With Naturally Acquired Babesiosis, Handan Mert, İbrahi̇m Yörük, Yeter Değer, Ni̇hat Mert, Semi̇ha Dede, Fatmagül Yur
Concentration Of Products Of Nitric Oxide Oxidation And Some Vitamins In Sheep With Naturally Acquired Babesiosis, Handan Mert, İbrahi̇m Yörük, Yeter Değer, Ni̇hat Mert, Semi̇ha Dede, Fatmagül Yur
Turkish Journal of Veterinary & Animal Sciences
The aim of the present study was to determine serum concentrations of the products of nitric oxide oxidation (nitrate and nitrite) and some vitamins (retinol acetate, \alpha- and \delta-tocopherol, and vitamin D_3) in sheep naturally infected with Babesia ovis. The investigation included 30 infected and 10 control sheep. Serum \alpha -tocopherol levels were significantly lower (P < 0.05), and nitrate and nitrite concentrations were significantly higher (P < 0.05) in infected animals than in controls. It is thought that the elevated nitrate and nitrite levels of the sheep infected with babesiosis were due to the result of damage caused by Babesia. On the other hand, a significant decrease was observed in \alpha -tocopherol levels in sheep with babesiosis because of damage and pathophysiological changes to erythrocytes.
Serum Adenosine Deaminase Activity In Domestic Animals: Reference Values, Nuri̇ Altuğ, Nazmi̇ Yüksek, Zahi̇d Ağaoğlu, İhsan Keleş
Serum Adenosine Deaminase Activity In Domestic Animals: Reference Values, Nuri̇ Altuğ, Nazmi̇ Yüksek, Zahi̇d Ağaoğlu, İhsan Keleş
Turkish Journal of Veterinary & Animal Sciences
This study was aimed to determine normal serum adenosine deaminase (ADA) activity in domestic animals in both sexes and that were considered healthy on the basis of clinical and laboratory examinations. In this study, 262 non-pregnant animals of both sexes, belonging to 5 species [cattle (n = 50), sheep (n = 65), goat (n = 52), dog (n = 55), and cat (n = 40)] were used. Serum total ADA and ADA1 isoenzyme activities were found to be 6.34 ± 0.31 IU/l and 6.34 ± 0.31 IU/l in cattle, 7.57 ± 0.30 IU/l and 7.31 ± 0.47 IU/l in sheep, …
Effects Of Oocyte Source On The Developmental Competence Of In Vitro Matured Goat Oocytes Fertilized By The Intracytoplasmic Sperm Injection Technique, Abu Nasar Md. Aminoor Rahman, Ramli Bin Abdullah, Wan Embong Wan-Khadijah
Effects Of Oocyte Source On The Developmental Competence Of In Vitro Matured Goat Oocytes Fertilized By The Intracytoplasmic Sperm Injection Technique, Abu Nasar Md. Aminoor Rahman, Ramli Bin Abdullah, Wan Embong Wan-Khadijah
Turkish Journal of Veterinary & Animal Sciences
This study evaluated the effects of oocyte source on in vitro maturation (IVM) and embryo developmental competence in goats by the intracytoplasmic sperm injection (ICSI) technique. Oocytes were obtained either by laparoscopic ovum pick-up (LOPU) or by slicing of abattoir ovaries. The donor does used for LOPU were superstimulated and their estrus was synchronized. Recovered oocytes from both sources were cultured in microdrops of IVM medium in the presence of CO2 (5%) at 38.5 °C in a CO2 incubator for 27 h. The ICSI was performed with immobilized sperm on the lid of a culture dish (35 mm) under an …
Effects Of Addition Of Vitamin B_{12} To The Extender On Post-Thaw Motility, Acrosome Morphology, And Plasma Membrane Integrity In Bull Semen, Jian Hong Hu, Qing Wang Li, Yu-Lin Chen, Zhong Liang Jiang, Yong Hong Jia, Li Qiang Wang, Bo Bo Ou
Effects Of Addition Of Vitamin B_{12} To The Extender On Post-Thaw Motility, Acrosome Morphology, And Plasma Membrane Integrity In Bull Semen, Jian Hong Hu, Qing Wang Li, Yu-Lin Chen, Zhong Liang Jiang, Yong Hong Jia, Li Qiang Wang, Bo Bo Ou
Turkish Journal of Veterinary & Animal Sciences
To investigate the effects of supplementation of vitamin B_{12} on bovine sperm post-thaw quality, vitamin B_{12} was added at the concentrations of 1.25, 2.50, 3.75, and 5.00 mg/mL to bovine semen cryoprotective medium. The results indicated that the motility and VSL, VCL, STR, and VAP values of sperm supplemented with 2.50 mg/mL vitamin B_{12} were significantly higher than those of other concentrations (P < 0.05). No significant difference was observed for LIN and ALH values and the percentage of grade a spermatozoa between the extenders containing 2.50 mg/mL and 3.75 mg/mL vitamin B_{12} (P > 0.05). The percentages of acrosome-intact and plasma membrane-intact spermatozoa were significantly improved (P < 0.05) by supplementing with 2.50 mg/mL vitamin B_{12}. With all parameters measured, the concentration of 2.50 mg/mL vitamin B_{12} showed the best results on the quality of bovine semen in freezing-thawing. In conclusion, the addition of 2.50 mg/mL vitamin B_{12} to the extender improved the bovine frozen semen quality.
Laparoscopic Sterilization Vs. Open Method Sterilization In Dogs: A Comparison Of Two Techniques, Anburaja Mahalingam, Naveen Kumar, Swapan K. Maiti, Ashok K. Sharma, Umesh Dimri, Meena Kataria
Laparoscopic Sterilization Vs. Open Method Sterilization In Dogs: A Comparison Of Two Techniques, Anburaja Mahalingam, Naveen Kumar, Swapan K. Maiti, Ashok K. Sharma, Umesh Dimri, Meena Kataria
Turkish Journal of Veterinary & Animal Sciences
Ten clinically healthy, adult male dogs randomly equally divided into 2 groups (I and II) were subjected to laparoscopic sterilization and open method castration under xylazine-ketamine anesthesia. In group I laparoscopic vasectomy by cauterization and cutting of the vas deferens was performed and in group II conventional open castration by the pre-scrotal approach was done. Insufflation of the abdominal cavity was achieved with CO_2 (2 L/min) at 10 mmHg pressure gradient. Two ports were needed to carry out the operation. Clinical observations revealed no significant changes. Differential leukocyte count (DLC) revealed significant neutrophilia and comparative lymphopenia on the 3rd postoperative …
Transcriptional Regulation Of The Porcine Type Ii Gnrh Receptor Gene, Vanessa M. Brauer
Transcriptional Regulation Of The Porcine Type Ii Gnrh Receptor Gene, Vanessa M. Brauer
Department of Animal Science: Dissertations, Theses, and Student Research
The classical mammalian form of gonadotropin releasing hormone (GnRH), GnRH I, is a hypothalamic neuropeptide that functions as a key regulator of reproduction. The interaction between GnRH I and its receptor, GnRH receptor I (GnRHR I), stimulates gonadotropin secretion from the anterior pituitary gland. The gonadotropins, luteinizing hormone (LH) and follicle stimulating hormone (FSH), act on the gonads to stimulate either steroidogenesis and ovulation or gametogenesis, respectively. The steroid hormones produced in the gonads act through a feedback pathway to regulate the production of both GnRH I from the hypothalamus and gonadotropins from the anterior pituitary.
Another form of GnRH, …
Horseshoe Crab Spawning Survey Protocol, Jennifer Mattei
Horseshoe Crab Spawning Survey Protocol, Jennifer Mattei
Biology Faculty Publications
The protocol lists supplies and clothing needed for the survey, as well as which data is to be collected and when and how it should be entered for the census of horseshoe crabs on the Recapture Data Sheet for 2009. Adopted from Cape Cod and Delaware Bay survey protocols.
Development And Evaluation Of New Mask Protocols For Gene Expression Profiling In Humans And Chimpanzees, Donna M. Toleno, Gabriel Renaud, Tyra G. Wolfsberg, Munirul Islam, Derek E. Wildman, Kimberly D. Siegmund, Joseph G. Hacia
Development And Evaluation Of New Mask Protocols For Gene Expression Profiling In Humans And Chimpanzees, Donna M. Toleno, Gabriel Renaud, Tyra G. Wolfsberg, Munirul Islam, Derek E. Wildman, Kimberly D. Siegmund, Joseph G. Hacia
Wayne State University Associated BioMed Central Scholarship
Abstract
Background
Cross-species gene expression analyses using oligonucleotide microarrays designed to evaluate a single species can provide spurious results due to mismatches between the interrogated transcriptome and arrayed probes. Based on the most recent human and chimpanzee genome assemblies, we developed updated and accessible probe masking methods that allow human Affymetrix oligonucleotide microarrays to be used for robust genome-wide expression analyses in both species. In this process, only data from oligonucleotide probes predicted to have robust hybridization sensitivity and specificity for both transcriptomes are retained for analysis.
Results
To characterize the utility of this resource, we applied our mask protocols …
State Of The Fisheries Report 2008/09, W.J Fletcher, K. Santoro
State Of The Fisheries Report 2008/09, W.J Fletcher, K. Santoro
Status Reports of the Fisheries and Aquatic Resources
The State of the Fisheries Report summarises the outcomes of many departmental activities undertaken during 2008/09 including management changes, compliance work and research to assess stock levels, monitor breeding stocks and undertake environmental assessments. This document provides a valuable reference point for the status of Western Australian fisheries of major importance to the commercial and recreational sectors, the aquaculture industry and for those interested in aquatic management.
Evaluation Of Aflatoxicosis In Hens Fed With Commercial Poultry Feed, Dharumadurai Dhanasekaran, Annamalai Panneerselvam, Nooruddin Thajuddin
Evaluation Of Aflatoxicosis In Hens Fed With Commercial Poultry Feed, Dharumadurai Dhanasekaran, Annamalai Panneerselvam, Nooruddin Thajuddin
Turkish Journal of Veterinary & Animal Sciences
The effect of aflatoxin in the growth of hens was histopathologically analyzed. Mycotoxigenic fungi were isolated and characterized as Aspergillus flavus and Aspergillus niger. The aflatoxin was extracted from Aspergillus flavus and their impact on the growth pattern of hens was evaluated. The histopathological analysis reveals that more lesions were found in the vital organs of hens in comparison with the control chick group. In the present study, it is concluded that the quality of poultry feed plays the most important role in a poultry farm. It is suggested that the use of chicks resistant to aflatoxicosis will help in …
Ameliorative Effect Of Esterified Glucomannan, Sodium Bentonite, And Humic Acid On Humoral Immunity Of Broilers During Chronic Aflatoxicosis, Hasan Ghahri, Ali̇reza Talebi, Mohamad Chamani, Houshang Lotfollahian, Nazar Afzali
Ameliorative Effect Of Esterified Glucomannan, Sodium Bentonite, And Humic Acid On Humoral Immunity Of Broilers During Chronic Aflatoxicosis, Hasan Ghahri, Ali̇reza Talebi, Mohamad Chamani, Houshang Lotfollahian, Nazar Afzali
Turkish Journal of Veterinary & Animal Sciences
A study was conducted on the impact of aflatoxin (AF) and mycotoxin binders on immunization against Infectious Bursal Disease (IBD) and Infectious Bronchitis (IB) in chickens. Broiler chicks (7-day-old) were randomly assigned to 9 dietary treatments with 4 replicates of 12 chicks each. Treatments were 1) control; 2) diet containing corn naturally contaminated with AF (NCD); 3) NCD + 0.2% Farmagülatör DRYTM humate (FH); 4) NCD + 0.4% FH; 5) NCD + 0.6% FH; 6) NCD + 0.8% FH; 7) NCD + 1% FH; 8) NCD + 0.5% sodium bentonite (SB); and 9) NCD + 0.1% esterified glucomannan (E-GM). Data …
A Tribute To Richard A. Dolbeer Richard A. Dolbeer: Scientist, Innovator, Manager, And Mentor, Bradley F. Blackwell, Travis L. Devault
A Tribute To Richard A. Dolbeer Richard A. Dolbeer: Scientist, Innovator, Manager, And Mentor, Bradley F. Blackwell, Travis L. Devault
Human–Wildlife Interactions
No abstract provided.
Forensic Bird-Strike Identification Techniques Used In An Accident Investigation At Wiley Post Airport, Oklahoma, 2008, Carla J. Dove, Nor Faridah Dahlan, Marcy Heacker
Forensic Bird-Strike Identification Techniques Used In An Accident Investigation At Wiley Post Airport, Oklahoma, 2008, Carla J. Dove, Nor Faridah Dahlan, Marcy Heacker
Human–Wildlife Interactions
On March 4, 2008, a Cessna Citation 1 (Model 500) crashed in a wooded area near Wiley Post Airport, Oklahoma, killing all 5 people on board. This paper describes the detailed forensic methods and expertise used by the Smithsonian Institution’s Feather Identification Lab to identify the bird that caused this bird-strike incident. We used standard methods of whole-feather analysis, microscopic examination, and DNA barcoding in this case to identify American white pelican (Pelecanus erythrorhynchos) as the bird species involved in this fatal crash. We also report the importance of proper field investigation and evidence collection for accurate results, …
The Amphipod Orchomenella Pinguis — A Potential Bioindicator For Contamination In The Arctic, Lis Bach, Valery E. Forbes, Ingela Dahllöf
The Amphipod Orchomenella Pinguis — A Potential Bioindicator For Contamination In The Arctic, Lis Bach, Valery E. Forbes, Ingela Dahllöf
Valery Forbes Publications
Indigenous organisms can be used as bioindicators for effects of contaminants, but no such bioindicator has been established for Arctic areas. Orchomenella pinguis is a benthic amphipod, ubiquitous in the Arctic and can be found in high numbers. We collected O. pinguis at sites with different contamination levels. Population characteristics (body length distribution, average dry weight and amphipod organic content) were related to sediment contaminant concentrations, in order to identify suitable endpoints for using this species as a bioindicator. We show that O. pinguis was prevalent in both clean and contaminated areas, easy to sample and that its population characteristics …
A Recombinant,Infectious Human Parainfluenza Virus Type 3 Expressing The Enhanced Green Fluorescentprotein For Use In High-Throughput Antiviral Assays, J. P. Roth, J. K. Li, Donald F. Smee, John D. Morrey, Dale L. Barnard
A Recombinant,Infectious Human Parainfluenza Virus Type 3 Expressing The Enhanced Green Fluorescentprotein For Use In High-Throughput Antiviral Assays, J. P. Roth, J. K. Li, Donald F. Smee, John D. Morrey, Dale L. Barnard
Animal, Dairy, and Veterinary Science Faculty Publications
The ability to rescue an infectious, recombinant, negative-stranded, RNA virus from a cDNA clone, has led to new opportunities for measuring viral replication from a viral expressed reporter gene. In this study, the enhanced green fluorescent protein (EGFP) gene was inserted into the human parainfluenza virus type 3 (HPIV-3) antigenome and a recombinant, infectious virus was rescued. Maximum EGFP expression levels, measured by fluorescence, were seen at day 3. Comparison of a three-day, viral expressed EGFP fluorescence assay to a seven-day, neutral red assay, based on complete cell destruction in virus infected MA-104 cells, yielded Z′-factor values of 0.83 and …
Spatial Variation In Otolith Chemistry Of Atlantic Croaker Larvae In The Mid-Atlantic Bight, Jason J. Schaffler, Christian S. Reiss, Cynthia M. Jones
Spatial Variation In Otolith Chemistry Of Atlantic Croaker Larvae In The Mid-Atlantic Bight, Jason J. Schaffler, Christian S. Reiss, Cynthia M. Jones
OES Faculty Publications
Larval Atlantic croaker Micropogonias undulatus (1 to 7 mm in standard length) were collected on the east coast of the United States from North Carolina to Delaware during 2000. We defined 3 water-mass boundaries for potential groups of spawning Atlantic croaker using temperature and salinity measured at each sampling station. We tested the hypothesis that distinct otolith chemistries existed among 3 groups of larval Atlantic croaker collected from these water masses using solution-based inductively coupled plasma-mass spectrometry. Multivariate analysis of variance indicated that otolith chemistry differed significantly among water masses. Using a quadratic discriminant function, we were able to correctly …
Patterns Of Larval Atlantic Croaker Ingress Into Chesapeake Bay, Usa, Jason J. Schaffler, Christian S. Reiss, Cynthia M. Jones
Patterns Of Larval Atlantic Croaker Ingress Into Chesapeake Bay, Usa, Jason J. Schaffler, Christian S. Reiss, Cynthia M. Jones
OES Faculty Publications
We compared ingress patterns of Atlantic croaker Micropogonias undulatus larvae into Chesapeake Bay, USA, with published ingress patterns through barrier island inlets, the accepted model for larval fish ingress. This model asserts that larvae ingress on night flood tides at the flooddominated side of the inlet and at all depths. At the Chesapeake Bay mouth and in the adjacent coastal waters, we compared the distribution of abundance, size, age, and growth rates of croaker prior to ingress, In contrast to the barrier island inlet model, croaker larvae were more abundant at depth than closer to the surface regardless of location. …
Peptide Hydrolysis And The Uptake Of Dipeptides By Phytoplankton, Margaret R. Mulholland, Cindy Lee
Peptide Hydrolysis And The Uptake Of Dipeptides By Phytoplankton, Margaret R. Mulholland, Cindy Lee
OES Faculty Publications
Rates of peptide hydrolysis (using the fluorescent substrate, lucifer yellow anhydride-labeled tetra-alanine) and dipeptide uptake (using dually labeled, 15N and 13C, dialanine) were measured in phytoplankton cultures and in natural populations during algal blooms dominated by one or two taxa. During most sampling events, both peptide hydrolysis and dipeptide uptake were greatest in the size fraction containing the dominant phytoplankter, suggesting that phytoplankton contribute substantially to or may even dominate observed extracellular peptide hydrolysis and dipeptide uptake in the environment. These are the first data suggesting that dipeptides may be taken up directly by phytoplankton and this may …
Revision Of The Ant Genus Crematogaster (Hymenoptera: Formicidae) In North America, Cynthia Ellen Morgan
Revision Of The Ant Genus Crematogaster (Hymenoptera: Formicidae) In North America, Cynthia Ellen Morgan
Open Access Theses & Dissertations
The natural history of thirty-eight species of the genus Crematogaster in North America has been discussed and distribution of specimens mapped. A dichotomous key to the workers of these species has been developed. I hypothesized that the species richness is not as great as previously thought in North America. A taxonomic review of these species has been made with the following changes:
Crematogaster cerasi Fitch 1855 senior synonym of C. browni Buren1968.
C. coarctata Mayr 1870 senior synonym of C. californica Emery 1895, C. mormonum
Emery 1895 and C. colei Buren1968.
C. depilis Wheeler 1919 senior synonym of C. larreae …
Revision Of The Ant Genus Procryptocerus (Hymenoptera: Formicidae: Myrmicinae: Cephalotini), Francisco Serna
Revision Of The Ant Genus Procryptocerus (Hymenoptera: Formicidae: Myrmicinae: Cephalotini), Francisco Serna
Open Access Theses & Dissertations
Ants of the genus Procryptocerus (Hymenoptera: Formicidae) are characterized by the protrusion of the clypeus forming a broad nasus and antennal scrobes over the eyes. The toruli are located directly posterior to the flanks of the nasus opposite to each other. The vertex is deflexed in most species. I present an in-group comparison of the external morphology focusing on the workers. I also present a general morphology for gynes and males. I analize previously mentioned characters as well as new ones, and clarify their character states in different species. For the metasoma I propose a new system of ant metasomal …
Dispersion Of Large-Seeded Tree Species By Two Forest Primates: Primate Seed Handling, Microhabitat Variability, And Post-Dispersal Seed Fate, Nicole D. Gross-Camp
Dispersion Of Large-Seeded Tree Species By Two Forest Primates: Primate Seed Handling, Microhabitat Variability, And Post-Dispersal Seed Fate, Nicole D. Gross-Camp
Antioch University Dissertations & Theses
I describe the relative effectiveness of two primates in dispersing large-seeded tree seeds (> 0.5 cm) in the Nyungwe National Park (NNP), Rwanda. My objectives are three-fold: (1) to describe the relative effectiveness of primates in dispersing the seeds of five large-seeded tree species, (2) to evaluate the influence of primate seed-handling method on seed fate, and (3) to determine the influence of deposition site on seed fate. I employed focal tree observations, day-follows of habituated primate groups, in situ monitoring of primate-dispersed seeds, and experimental plots to achieve these objectives. Data were collected over the course of one year …
Louis A. Fuertes And The Zoological Art Of The 1926–1927 Abyssinian Expedition Of The Field Museum Of Natural History, Paul A. Johnsgard
Louis A. Fuertes And The Zoological Art Of The 1926–1927 Abyssinian Expedition Of The Field Museum Of Natural History, Paul A. Johnsgard
Papers in Ornithology
The year 2009 marked the 110th anniversary of the first colored reproduction of a Fuertes painting; a watercolor of two seaside sparrows published in The Auk, when Fuertes was about 25 years old. Although Fuertes' life spanned little more than a half-century, and most living ornithologists were born after his tragic 1927 death, his influence on natural history art has not lessened. This manuscript is a testimony to his enduring artistic legacy.
I first looked in awe at the original set of Fuertes paintings in the summer of 1995, during a visit to the Field Museum in conjunction with …