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2006

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Articles 1 - 30 of 676

Full-Text Articles in Life Sciences

Properties Of Corneal Receptors In A Teleost Fish, Paul J. Ashley, Lynne U. Sneddon, Catherine R. Mccrohan Dec 2006

Properties Of Corneal Receptors In A Teleost Fish, Paul J. Ashley, Lynne U. Sneddon, Catherine R. Mccrohan

Veterinary Science and Medicine Collection

Corneal receptors have not previously been identified in lower vertebrates. The present study describes the properties of trigeminal ganglion corneal receptors in a teleost fish, the rainbow trout (Oncoryhnchus mykiss). Out of 27 receptors, 7 were polymodal nociceptors, 6 were mechanothermal nociceptors, 2 were mechanochemical receptors and the largest group, 12, were only responsive to mechanical stimulation. No cold responsive receptors were found on the trout cornea. Mechanical and thermal thresholds were lower and receptive field diameters smaller than those of cutaneous trigeminal receptors in the trout, demonstrating greater sensitivity in the cornea. The lack of cold sensitive neurons may ...


The Effects Of Suspended Sediment On The Aquatic Organisms Daphnia Magna And Pimephales Promelas, Neil Capper Dec 2006

The Effects Of Suspended Sediment On The Aquatic Organisms Daphnia Magna And Pimephales Promelas, Neil Capper

All Theses

Land use change results in significant amounts of soil migrating into aquatic streams during storm events. This suspended sediment, even in the absence of adsorbed contaminants, may be a significant stressor to aquatic organisms. The data on ecological effects of suspended sediment has mainly focused on salmonids or ecosystem level consequences such as habitat alteration. Few studies have quantified physiologic effects of suspended solids on water column organisms. The purpose of this research was to determine the effects of suspended clay on Daphnia magna and Pimephales promelas. Results of 7 d toxicity tests with D. magna in natural and defined ...


Modified Soy Products And Methods For Reducing Odor And Improving Flavor Of Soy Products, William L. Boatright Dec 2006

Modified Soy Products And Methods For Reducing Odor And Improving Flavor Of Soy Products, William L. Boatright

Animal and Food Sciences Faculty Patents

A method for reducing odor in soy products and compositions containing soy products by adding or admixing a compound having one or more disulfide bonds to the soy product or composition. The disulfide compound includes a peptide containing at least cystine residue, a peptide or polypeptide containing at least one disulfide bond, L-cystine, D-cystine, DL-cystine and any combination thereof.


Front Matter, Vol. 66 No. 4 Dec 2006

Front Matter, Vol. 66 No. 4

Western North American Naturalist

No abstract provided.


End Matter, Vol. 66 No. 4 Dec 2006

End Matter, Vol. 66 No. 4

Western North American Naturalist

No abstract provided.


The Role Of Natural And Sexual Selection In The Origin And Maintenance Of Divergence Within And Between The Mexican Sailfin Mollies, Poecilia Velifera And P. Petenensis, Shala Hankison Dec 2006

The Role Of Natural And Sexual Selection In The Origin And Maintenance Of Divergence Within And Between The Mexican Sailfin Mollies, Poecilia Velifera And P. Petenensis, Shala Hankison

All Dissertations

Understanding speciation remains a holy grail of evolutionary biology. One useful approach is studying the evolutionary mechanisms important in population divergence to infer the mechanisms important in speciation. This method is especially useful when closely related species can be compared to determine whether intraspecific differences parallel interspecific differences. I studied population divergence in two species of Mexican sailfin mollies, Poecilia velifera and P. petenensis. These closely related species are particularly useful for this type of study, as they live in habitats that may differ in the importance of natural selection. In addition, these species may differ in the importance and ...


Forage Adaptability Trials For Forage And Seed Production In Bolivia; Effect Of 5 Herbicides On 7 Native Utah Forbs, Joshua C. Voss Dec 2006

Forage Adaptability Trials For Forage And Seed Production In Bolivia; Effect Of 5 Herbicides On 7 Native Utah Forbs, Joshua C. Voss

Theses and Dissertations

The harsh environmental and poor economic conditions of the Bolivian Altiplano require intervention to assist many of those that live there to become economically self-sufficient. We attempted to find introduced dry season reserve forage grasses that could produce enough biomass to be useful as feed for livestock, and that could also produce enough seed to distribute to farmers. While some of the grasses produced reasonable amounts of biomass, none produced seed in quantities that would be even close to being economically viable. The most likely cause of this is that the timing of resources that the grasses need to flower ...


Lpe Center News, December 2006 Dec 2006

Lpe Center News, December 2006

Livestock and Poultry Environmental Learning Center Newsletters

In this issue:

• Integrated Nutrient Management and Limits of the P-Index

• Pathogen Resources Available on the Website

• Quick Start Your Search with Dynamic Bibliographies

• Environmental Management Systems for Agriculture


A Comparative Study Of The Fractionation Of Regular Buttermilk And Whey Buttermilk By Microfiltration, Pierre Morin, Yves Pouliot, Rafael Jiménez-Flores Dec 2006

A Comparative Study Of The Fractionation Of Regular Buttermilk And Whey Buttermilk By Microfiltration, Pierre Morin, Yves Pouliot, Rafael Jiménez-Flores

Dairy Science

The use of a ceramic microfiltration (MF) membrane for the fractionation of buttermilk and whey buttermilk obtained from pilot scale churning of cream and whey cream from industrial sources has been studied. Whey buttermilk contained comparable amounts of phospholipids compared to regular buttermilk but its protein content was lower due to the absence of caseins. However, it was found that lipid content of whey cream did vary significantly between lots resulting in important variations in the fat content of whey buttermilk. A twofold MF concentration of regular buttermilk doubled its phospholipids content whereas that of whey buttermilk was increased by ...


Influence Of Ph And Heat Treatment Of Whey On The Functional Properties Of Whey Protein Concentrates In Yoghurt, Isabelle Sodini, Jerry Mattas, Phillip S. Tong Dec 2006

Influence Of Ph And Heat Treatment Of Whey On The Functional Properties Of Whey Protein Concentrates In Yoghurt, Isabelle Sodini, Jerry Mattas, Phillip S. Tong

Dairy Science

Our aim was to investigate how two conditions of whey processing, pH and heat treatment, affect the physical properties of stirred yoghurts fortified to 45 g protein kg−1 with whey protein concentrates (WPC). Cheddar whey was heated at pH 6.4 or pH 5.8 at 72 °C for 15 s, eventually heated further at 82 or 88 °C for 78 s, ultrafiltered, and spray dried. Resulting WPC contained 38% protein; the denaturation level of the whey protein was 10–53%. There were significant (P


Genetic Resolution Of The Enigmatic Lesser Antillean Distribution Of The Frog Leptodactylus Validus (Anura, Leptodactylidae), Keneth Yanek, W. R. Heyer, Rafael O. De Sá Dec 2006

Genetic Resolution Of The Enigmatic Lesser Antillean Distribution Of The Frog Leptodactylus Validus (Anura, Leptodactylidae), Keneth Yanek, W. R. Heyer, Rafael O. De Sá

Biology Faculty Publications

Leptodactylus validus has an unusual distribution, inhabiting Trinidad, Tobago, and the Lesser Antilles, but not the mainland of South America. This distribution is inconsistent with other distribution patterns observed for these islands. Although slight variation in adult morphology has been observed among the different island populations of L. validus, call data suggest the presence of a single species. Calls of L. pallidirostris from Venezuela and Brazil suggested that this taxon might be conspecific with L. validus. Sequence data from the 12S and 16S mt rDNA genes indicate that L. validus represents a single species throughout its distribution and is conspecific ...


Karyotypes Of Eight Species Of Leptodactylus (Anura, Leptodactylidae) With A Description Of A New Karyotype For The Genus, Renata Cecília Amaro-Ghilardi, Gabriel Skuk, Rafael O. De Sá, Miguel Trefaut Rodrigues, Yatiyo Yonenaga-Yassuda Dec 2006

Karyotypes Of Eight Species Of Leptodactylus (Anura, Leptodactylidae) With A Description Of A New Karyotype For The Genus, Renata Cecília Amaro-Ghilardi, Gabriel Skuk, Rafael O. De Sá, Miguel Trefaut Rodrigues, Yatiyo Yonenaga-Yassuda

Biology Faculty Publications

Karyotypes of eight species of Leptodactylus (Anura, Leptodactylidae) with a description of a new karyotype for the genus. Eight species of the Neotropical genus Leptodactylus were karyologically studied: seven of them (L. gracilis, L. mystacinus, L. petersii, L. pustulatus, L. macrosternum, L. ocellatus, L. labyrinthicus) presented 2n=22 and L. silvanimbus showed a distinctive karyotype with 2n=24. Nucleolar organizer regions (Ag-NORs) were detected in two different pairs of chromosomes: pair 4 at the proximal region of the long arm of one individual of L. mystacinus from São Paulo state and of L. petersii; and pair 8 of all other ...


Occurrence Of Antibiotic Resistance In Environmental And Amphibian E. Coli Isolates Associated With Cattle And Aquatic Environments, Robin Lynn Cissell Dec 2006

Occurrence Of Antibiotic Resistance In Environmental And Amphibian E. Coli Isolates Associated With Cattle And Aquatic Environments, Robin Lynn Cissell

Masters Theses

The widespread use of antibiotics in human medicine and livestock production has been linked to an increase in resistant bacteria, which may carry transferable resistance factors, including integrons. Foodborne pathogens, such as Escherichia coli and salmonella, commonly reside in livestock, including cattle, and these pathogens may acquire resistance genes as a result of routine antibiotic use. As cattle are often located in close proximity to aquatic environments, they may disperse antibiotic resistant pathogens into such environments, which may lead to contamination of aquatic wildlife. We hypothesize that class 1 integrons and/or antibiotic resistant bacteria occur more frequently in environments ...


Inhibition Of Direct Prostaglandin F Effects On Pre-Attachment Embryos Improves Reproductive Efficiency In Cattle, Fernando Nestor Scenna Dec 2006

Inhibition Of Direct Prostaglandin F2Α Effects On Pre-Attachment Embryos Improves Reproductive Efficiency In Cattle, Fernando Nestor Scenna

Doctoral Dissertations

Prostaglandin F (PGF) has been shown to have detrimental effects on embryonic development, quality and hatching ability of embryos and pregnancy rates in cows. However, information about PGF receptor (FPr) mRNA and protein in the preattachment bovine embryo is absent in the literature. The first experiment was design to identify the period of time during in vitro embryo development that is most susceptible to PGF and to determine FPr mRNA and protein in bovine embryos. Prostaglandin F decreased development of embryos to compact morula, but had no effect on development to blastocyst. In addition, FPr ...


Supplementation Of Purified Fiber To Tall Fescue Grass Hay Diets, Howard Martin Blalock Dec 2006

Supplementation Of Purified Fiber To Tall Fescue Grass Hay Diets, Howard Martin Blalock

Doctoral Dissertations

Experiments were conducted to define the degradation kinetics of purified fiber products compared to conventional feedstuffs. In situ analysis was conducted on soybean hulls, dried distillers grains, dried corn gluten feed, rice mill, wheat middlings, solka floc, oat fiber (200 and 300 series), corn bran, red and white wheat bran using nylon bags. In situ results determined oat fiber (300) and solka floc were most similar to soybean hulls and secondly to corn gluten feed. An oat fiber: solka floc mixture was formulated for subsequent experiments. The in vitro experiment consisted of alfalfa hay, soybean hulls, corn gluten feed, oat ...


Feeding And Managing Sheep In Dry Times, Ian Mcfarland, Mandy Curnow, Mike Hyder, Brian Ashton, Danny Roberts Dec 2006

Feeding And Managing Sheep In Dry Times, Ian Mcfarland, Mandy Curnow, Mike Hyder, Brian Ashton, Danny Roberts

Bulletins 4000 -

Feeding sheep is a significant cost to any sheep or mixed farm enterprise in southern Australia. The cost is usually managed by annually sourcing feed on-farm. However, this feed source can become scarce when we experience unusual dry spells within seasons (termed a 'dry season', such as a dry winter or spring), a late break to the season, a drought year, or even worse, successive drought years.

Climate change research suggests that southern Australia will experience higher annual temperatures and a decline in mean growing season rainfall (particularly winter and spring) over the coming decades. This will affect the productivity ...


Diel And Tidal Rhythms Of Emercenge Events Based On Acousitc Observations In A Shallow Estuary, Mei Sato Dec 2006

Diel And Tidal Rhythms Of Emercenge Events Based On Acousitc Observations In A Shallow Estuary, Mei Sato

Electronic Theses and Dissertations

Field observations of emergence events by epibenthic animals were conducted with two Tracor Acoustic Profiling Systems (TAPS) in the Damariscotta River estuary, Maine, in fall 2005 and summer 2006. Spectral analysis revealed that periodic temporal variability of the acoustic signals was concentrated at four periods. One was the solar day (24 h) and the other three were lunar tidal periods of 25.82 (diurnal or Oi), 12.42 (semidiurnal or M2) and 6.21 h (half the semidiurnal period). The mysid Neomysis americana showed strong nocturnal migration patterns of water-column activity during its peak summer emergence season, regulated by the ...


A Sex-Linked Allele, Autosomal Modifiers And Temperature-Dependence Appear To Regulate Melanism In Male Mosquitofish (Gambusia Holbrooki), Lisa Horth Dec 2006

A Sex-Linked Allele, Autosomal Modifiers And Temperature-Dependence Appear To Regulate Melanism In Male Mosquitofish (Gambusia Holbrooki), Lisa Horth

Biological Sciences Faculty Publications

About 1% of male mosquitofish (Gambusia holbrooki) express melanic (mottled-black) body coloration, which differs dramatically from the wild-type, silvery-gray coloration. Here, I report on the genetic inheritance pattern of melanic coloration, which indicates Y-linkage, and at least one autosomal modifier. Phenotypic expression of melanism is also affected by temperature. Expression is constitutive ( temperature insensitive) in some populations, inducible ( temperature sensitive) in others. Constitutive and inducible expression occur among geographically proximal populations. However, males from any single population demonstrate the same constitutive or inducible expression pattern as one another. The F1 males from inter-population crosses demonstrate temperature-related expression patterns like their ...


Effects Of Training And Experience On Repeatable And Reliable Assessment Of Beef Cattle Body Condition Scores, Pete Burmeister Dec 2006

Effects Of Training And Experience On Repeatable And Reliable Assessment Of Beef Cattle Body Condition Scores, Pete Burmeister

Masters Theses & Specialist Projects

In recent years, body condition scores (BCS) have been included in Expected Progeny differences (EPD) calculations for maintenance energy. This experiment was designed to identify the acuteness at which technicians of different skill levels can correctly quantify BCS in beef cattle. Thirteen students enrolled in agriculture at Western Kentucky University were assigned to three experimental technician groups based on training level. Five members of the colligate livestock judging team with extensive cattle backgrounds were BCS trained and assigned to the experienced level, four students were BCS trained by the WKU livestock judging coach and assigned to the trained level, and ...


An Evaluation Of The Behavioral Responses Of Cownose Rays (Rhinoptera Bonasus) To Permanent Magnets And Electropositive Alloys, Robert A. Fisher, Eric M. Stroud, Michael M. Herrmann, Patrick H. Rice Dec 2006

An Evaluation Of The Behavioral Responses Of Cownose Rays (Rhinoptera Bonasus) To Permanent Magnets And Electropositive Alloys, Robert A. Fisher, Eric M. Stroud, Michael M. Herrmann, Patrick H. Rice

Reports

No abstract provided.


Initial Market Assessment Of The Cultured, Non-Native Oyster C. Ariakensis, Robert A. Fisher Dec 2006

Initial Market Assessment Of The Cultured, Non-Native Oyster C. Ariakensis, Robert A. Fisher

Reports

No abstract provided.


Market Assessment And Feasibility Analysis For Small Scale Aquaculture Development In The Southside Of Virginia Aquaculture Cooperative Feasibility Study, Thomas J. Murray Dec 2006

Market Assessment And Feasibility Analysis For Small Scale Aquaculture Development In The Southside Of Virginia Aquaculture Cooperative Feasibility Study, Thomas J. Murray

Reports

No abstract provided.


Arkansas Animal Science Department Report 2006, Zelpha B. Johnson, D. Wayne Kellogg Dec 2006

Arkansas Animal Science Department Report 2006, Zelpha B. Johnson, D. Wayne Kellogg

Research Series

No abstract provided.


Lincoln Fall Field Days Dec 2006

Lincoln Fall Field Days

Nebraska Bird Review

The 2006 NOU Fall Field Days were held in and around Lincoln on Sept. 15-17. Our evening meals and programs took place at the Howard Johnson's Motel on Cornhusker Highway,

Our Friday evening speaker was Dr. Paul Johnsgard, who spoke about the Birding Trails website being developed by a committee of the All Bird Consortium, On Saturday afternoon, NOU Librarian Mary Lou Pritchard gave a tour of the current exhibit of her late husband Bud Pritchard's artwork at the Nebraska State Museum in Morrill Hall. Saturday evening Dan Kim spoke on the Whooping Crane Trust activities along the ...


Masthead From Nebraska Bird Review December 2006 Dec 2006

Masthead From Nebraska Bird Review December 2006

Nebraska Bird Review

The Nebraska Bird Review is published quarterly by the Nebraska Ornithologists' Union, Inc., as its official journal, and is sent to members not in arrears of dues. Annual subscription rates (on a calendar-year basis only): $15 in the United States, $18 in Canada and $30 in all other countries, payable in advance. Single copies are $4 each, postpaid, in the United States, $5 in Canada, and $8 elsewhere. Send orders for back issues to Mary Lou Pritchard, NOU Librarian, c/o University of Nebraska State Museum, W-436 Nebraska Hall, Lincoln, NE 685880514.

Memberships in the NOU (on a calendar-year basis ...


Index To Volume 74 Dec 2006

Index To Volume 74

Nebraska Bird Review

Index to Volume 74 (11 pages)

Abraham, K. 105

Accipiter sp 28-29, 65

Allmand, Matt 40

American Ornithologists' Union 38, 105, 132-133

Amiotte, Sue 4I, 112

Anhinga 71

Ankney, C. D. 105

Armknecht, Henry 25, 40

Aubushon,
Dottie 25
Kathy 25

Audubon. lohn lames 132-133, 136

Austin, J. E. 97

Avocet, American 48,84, 11 7, 142

....

Yellowlegs,
Greater 48, 85, 117
Lesser 48, 66, 85, 117, 129

Yellowthroat, Common 57,68,92, 125, 131, 142

Vi, Chunhui 25

Young, Betty 25

Zahurones, Penny 25

Ziewitz. J. W. 98


The Nebraska Bird Review Whole Issue December 2006 Dec 2006

The Nebraska Bird Review Whole Issue December 2006

Nebraska Bird Review

Table of Contents

Fall Field Report, Aug.–Nov. 2006 by W. Ross Silcock....................... 110

Fall Field Days at Lincoln, Sept. 15–17, 2006....................... 128

The Art and Artistic Legacy of Louis Agassiz Fuertes by Paul A. Johnsgard ....................... 132

The 2006 Nebraska Nest Report by Wayne J. Mollhoff ....................... 142

Index to Volume 74....................... 148

Subscription and Organization Information....................... 159


Fall Field Report, August-November 2006, W. Ross Silcock Dec 2006

Fall Field Report, August-November 2006, W. Ross Silcock

Nebraska Bird Review

First, I want to say how much I appreciate observers' responses to my requests for additional details on various sightings, not just rarities, but early and late dates. It's important to have these details for the archives to help future readers and researchers feel more comfortable with records from our era.

Patterns that were apparent included a generally quiet fall for waterfowl (they were all at Lake McConaughy), but excellent numbers of the rarer two scoters (but NO White-winged!) and a surprising 16 Red-necked Grebes. On the other hand, numbers of staging Western Grebes were down significantly, apparently due ...


The 2006 Nebraska Nest Report, Wayne Mollhoff Dec 2006

The 2006 Nebraska Nest Report, Wayne Mollhoff

Nebraska Bird Review

The drought that began in 1999 continued over most of Nebraska this year, with 7 of the past 8 years receiving lower than normal rainfall. More normal rains fell in April and early May, especially in the central and east, before stopping for most of the summer. Most of the Panhandle and southwest were declared drought disaster areas by early summer, setting the stage in late July for the worst fire season in memory in the Pine Ridge area of the northern Panhandle (Fowler, 2007). Ultimately, 83 of 93 counties were declared part of the drought disaster area. Low water ...


The Art And Artistic Legacy Of Louis Agassiz Fuertes, Paul A. Johnsgard Dec 2006

The Art And Artistic Legacy Of Louis Agassiz Fuertes, Paul A. Johnsgard

Nebraska Bird Review

Perhaps some Nebraska birders will not immediately recognize the name Louis Agassiz Fuertes, as he died almost 80 years ago. Yet he influenced the art of bird painting as much as did John James Audubon, and provided wonderful artwork for many major state bird reference books. He also personally tutored George Miksch Sutton, the Nebraska-born artist and biologist who provided the NOU with its Burrowing Owl logo, and who contributed greatly to American ornithology, especially that of the southern Great Plains.

It is interesting that, like John James Audubon, Roger Tory Peterson, and George Miksch Sutton, we would never think ...