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Articles 241 - 270 of 679
Full-Text Articles in Animal Sciences
Management Of The Houtman Abrolhos System. A Draft Review 2007 - 2017, Department Of Fisheries (Western Australia) On Advice From The Abrolhos Islands Management Advisory Committee
Management Of The Houtman Abrolhos System. A Draft Review 2007 - 2017, Department Of Fisheries (Western Australia) On Advice From The Abrolhos Islands Management Advisory Committee
Fisheries Management Papers
This review contains a brief description of the Abrolhos System and its special values. It also states the goal and principal objectives for management during the next ten years (2006-2016), along with updated strategies to achieve these objectives. The document succinctly outlines the direction for multiple use management of the Houtman Abrolhos Islands as determined by the Abrolhos Islands Management Advisory Committee (AIMAC). The Committee’s role is to advise the Minister for Fisheries on management of the Abrolhos Islands and the Abrolhos Islands Fish Habitat Protection Area.
The Mayfly Newsletter, Peter M. Grant
The Mayfly Newsletter, Peter M. Grant
The Mayfly Newsletter
The Mayfly Newsletter is the official newsletter of the Permanent Committee of the International Conferences on Ephemeroptera.
Lpe Center News, February 2007
Lpe Center News, February 2007
Livestock and Poultry Environmental Learning Center: Newsletters
In this issue: • Nitrogen Availability from Organic Sources is the Topic of March Webcast • LPE Webcasts Approved for Continuing Education Units • Ag Research Service Website Offers Many Resources • LPE Learning Center Website Adds Nutrient Resources, Expands Pathogen Section, and Offers an Archive of Past Webcasts
Root Lesion And Burrowing Nematodes In Western Australian Cropping Systems, Vivien Vanstone
Root Lesion And Burrowing Nematodes In Western Australian Cropping Systems, Vivien Vanstone
Bulletins 4000 -
Nematodes are common soil pests that feed on the roots of a wide range of crop plants in all agricultural areas of Western Australia, irrespective of soil type and rainfall. Nematodes multiply on susceptible hosts. Consequently, as nematode populations increase, crop production is limited. Cereal yield losses due to nematodes in Western Australia are in the order of 5 to 15 per cent per annum, but individual losses as high as 40 per cent have been recorded.
Determining Winter Flounder Spawning Sites In Two Connecticut Estuaries, Eric T. Schultz, Jose J. Pereira, Peter J. Auster
Determining Winter Flounder Spawning Sites In Two Connecticut Estuaries, Eric T. Schultz, Jose J. Pereira, Peter J. Auster
EEB Articles
Winter flounder (Pseudopleuronectes americanus) come inshore during the late winter and early spring to lay their eggs in shallow bays and estuaries along the coast. Unlike most fish eggs, which are buoyant, these eggs are demersal and sink to the seafloor. This makes them vulnerable to burial from various types of natural and human caused disturbances (e.g., storms, mobile fishing gear, maintenance dredging). Our objective was to map spawning areas in two harbors and search for generalities among these sites that would allow us to predict where winter flounder might spawn in other areas. This would allow managers to avoid …
Cottonwood And Antelope Range Livestock Research Stations Unit Report, Kenneth C. Olson
Cottonwood And Antelope Range Livestock Research Stations Unit Report, Kenneth C. Olson
South Dakota Beef Report, 2007
Two research stations, the Cottonwood and Antelope Range Livestock Research Stations, are located in western South Dakota that allow research projects focused on needs of range livestock producers in that region. The stations are comprised primarily of native rangeland that is grazed by cattle at both stations, and also by sheep at Antelope. The philosophy of the research efforts has been focused on conducting applied research to solve problems and address rangeland and livestock management opportunities relevant to the livestock producers and land mangers of the region.
Evaluation Of Mixing Characteristics Of Diets Containing Modified Distillers Grains, Erik R. Loe, Bradley D. Rops, John T. Keimig
Evaluation Of Mixing Characteristics Of Diets Containing Modified Distillers Grains, Erik R. Loe, Bradley D. Rops, John T. Keimig
South Dakota Beef Report, 2007
Six mixes of feed were manufactured and analyzed to determine how sequence of ingredient addition into a feed mixer influences mixing characteristics when modified distillers grains (mDG) was used as a feed ingredient. Five mixes were manufactured using a 3-bar rotor mixer and one mix was manufactured using a staggered-rotor mixer. There were three diet types evaluated: 1) high-forage receiving diet; 2) high-grain finishing diet with ground grass hay (GH) as the roughage source; and 3) high-grain finishing diet with silage as the roughage source. Five samples were collected from each mix and were analyzed for particle size and nutrient …
Forage Quality: What Is It? What Can We Do About It? And, Will It Pay?, Garry D. Lacefield
Forage Quality: What Is It? What Can We Do About It? And, Will It Pay?, Garry D. Lacefield
Forage Symposium at the Kentucky Cattlemen’s Convention
Profitable livestock production almost always requires a forage program that will supply large quantities of adequate quality, homegrown feed. A major percentage of the feed units for beef (83%) and dairy cattle (61%) come from forages. In addition, forages supply an estimated 91%, 72%, 15% and 99% of the nutrients consumed by sheep and goats, horses, swine, and wildlife, respectively.
Matching Pasture To Animal Needs, S. Ray Smith
Matching Pasture To Animal Needs, S. Ray Smith
Forage Symposium at the Kentucky Cattlemen’s Convention
Cattle have a wide range of nutrient requirements depending on maturity, weight, growth potential, pregnancy, milk production, desired daily production, and other factors.
Can I Afford To Seed Novel-Endophyte Tall Fescue?, Kenneth H. Burdine
Can I Afford To Seed Novel-Endophyte Tall Fescue?, Kenneth H. Burdine
Forage Symposium at the Kentucky Cattlemen’s Convention
Tall fescue is the predominant forage grass of Kentucky. It is an easily established, relatively persistent bunchgrass that has reasonable drought tolerance and does well in clay or loam soils. However, the endophyte fungus found in the grass was linked to poor animal performance in the late 1970’s (Ball, Hoveland, and Lacefield). It has been estimated that 85% of Kentucky’s fescue pastures are endophyte infected, making it a serious problem for Kentucky cattle producers (Lacefield, Henning, and Philips). Producers interested in establishing or replacing tall fescue stands have several options available to them.
How I Produce, Manage And Market Forages, Bill Payne
How I Produce, Manage And Market Forages, Bill Payne
Forage Symposium at the Kentucky Cattlemen’s Convention
I would like to amend the title to: “How I Produce, Manage and Market Forages, Profitably.” My experience has led me to believe that keeping things simple has allowed me to focus better and that has led to profitability. This has led me to make every effort to reduce my reliance on machinery and to allow the cows to do the work. I focus on maximizing forage utilization and minimizing the number of days of feeding stored feeds.
Where To Find Forage Information On The Web, Tom Keene
Where To Find Forage Information On The Web, Tom Keene
Forage Symposium at the Kentucky Cattlemen’s Convention
The Internet can take you almost anywhere you want to go these days. You can gather information, shop, take classes, play games, etc. So, it is logical to assume that you can find lots of information about forages on the Internet.
Foreword [2007], Garry D. Lacefield, Christi L. Forsythe
Foreword [2007], Garry D. Lacefield, Christi L. Forsythe
Forage Symposium at the Kentucky Cattlemen’s Convention
No abstract provided.
The Effect Of Gnrh At Time Of Insemination On Initiation Of Lh Pulses And Subsequent Progesterone, Sarah D. Fields, Brandy L. Perry, George A. Perry
The Effect Of Gnrh At Time Of Insemination On Initiation Of Lh Pulses And Subsequent Progesterone, Sarah D. Fields, Brandy L. Perry, George A. Perry
South Dakota Beef Report, 2007
Research has indicated that luteinizing hormone (LH) pulses play a vital role in corpus luteum (CL) formation and subsequent progesterone concentrations. Therefore, our objectives were to determine: 1) when LH pulses begin following onset of estrus, 2) the effect an injection of gonadotropin releasing hormone (GnRH) would have on initiation of LH pulses, and 3) the effect LH pulse initiation had on subsequent plasma progesterone concentrations. Cows were synchronized with the Select Synch + Controlled Internal Drug Releasing device (CIDR) protocol (d -7 100 μg GnRH and CIDR; d 0 25 mg prostaglandin (PG) and removal of CIDR; estrus detected …
Effect Of Supplemental Fat From Dried Distillers Grains With Solubles Or Corn Oil On Cow Performance, Igf-1, Gh, And Nefa Concentrations, Abigail Bartosh, Cody Wright, Aimee Wertz-Lutz, George Perry
Effect Of Supplemental Fat From Dried Distillers Grains With Solubles Or Corn Oil On Cow Performance, Igf-1, Gh, And Nefa Concentrations, Abigail Bartosh, Cody Wright, Aimee Wertz-Lutz, George Perry
South Dakota Beef Report, 2007
Research has demonstrated that supplemental fat and(or) changes in growth hormone (GH) or insulin-like growth factor-1 (IGF-1) concentrations may affect reproductive performance in beef females. Dried distillers grains with solubles (DDGS) contain approximately 10% to 15% fat; however, minimal research to date has investigated DDGS specifically as a supplemental fat source. The objective of this experiment was to investigate whether supplemental fat from either DDGS or raw corn oil impacts cow growth performance and plasma GH, IGF-1, or non-esterified fatty acid (NEFA) concentrations. Sixty open beef cows [body weight (BW) = 553.5 ± 38.7 kg; body condition score (BCS) = …
Isolation And Selective Culture Of Quail Primordial Germ Cells And The Development Of A Cross Culture System To Harbor Development Of Manipulated Embryos, C. M. Kimmell, A. Saribalis, J. Echeverria, L. Shuey, K. A. Shaw, K. L. Shaw, D. G. Peterson
Isolation And Selective Culture Of Quail Primordial Germ Cells And The Development Of A Cross Culture System To Harbor Development Of Manipulated Embryos, C. M. Kimmell, A. Saribalis, J. Echeverria, L. Shuey, K. A. Shaw, K. L. Shaw, D. G. Peterson
Animal Science
Primordial germ cells (PGCs) are the embryonic precursors of adult egg and sperm. Isolation, propagation, genetic manipulation and reimplantation of modified PGCs that retain their commitment to the germline have been recently described for the successful generation of transgenic chickens [1]. Here, we report the adaptation and application of these techniques to Japanese quail for the purpose of future applications involving the introduction of a phytase transgene as previously described [2]. Quail PGCs are harvested by aspiration of whole embryonic blood from embryos that have been incubated for 48– 52 h. Blood is aspirated using a mouth pipette fitted with …
Tackling Biocomplexity With Meta-Models For Species Risk Assessment, Philip J. Nyhus, Robert C. Lacy, Francis R. Westley, Philip S. Miller, Harrie Harrie Vredenburg, Paul C. Paquet, John Pollak
Tackling Biocomplexity With Meta-Models For Species Risk Assessment, Philip J. Nyhus, Robert C. Lacy, Francis R. Westley, Philip S. Miller, Harrie Harrie Vredenburg, Paul C. Paquet, John Pollak
Faculty Scholarship
We describe results of a multi-year effort to strengthen consideration of the human dimension into endangered species risk assessments and to strengthen research capacity to understand biodiversity risk assessment in the context of coupled human-natural systems. A core group of social and biological scientists have worked with a network of more than 50 individuals from four countries to develop a conceptual framework illustrating how human-mediated processes influence biological systems and to develop tools to gather, translate, and incorporate these data into existing simulation models. A central theme of our research focused on (1) the difficulties often encountered in identifying and …
From Morphology To Neural Information: The Electric Sense Of The Skate, Marcelo Camperi, Timothy C. Tricas, Brandon R. Brown
From Morphology To Neural Information: The Electric Sense Of The Skate, Marcelo Camperi, Timothy C. Tricas, Brandon R. Brown
Physics and Astronomy
Morphology typically enhances the fidelity of sensory systems. Sharks, skates, and rays have a well-developed electrosense that presents strikingly unique morphologies. Here, we model the dynamics of the peripheral electrosensory system of the skate, a dorsally flattened batoid, moving near an electric dipole source (e.g., a prey organism). We compute the coincident electric signals that develop across an array of the skate's electrosensors, using electrodynamics married to precise morphological measurements of sensor location, infrastructure, and vector projection. Our results demonstrate that skate morphology enhances electrosensory information. Not only could the skate locate prey using a simple population vector algorithm, but …
Bird Movement Predicts Buggy Creek Virus Infection In Insect Vectors, Charles R. Brown, Mary Bomberger Brown, Amy T. Moore, Nicholas Komar
Bird Movement Predicts Buggy Creek Virus Infection In Insect Vectors, Charles R. Brown, Mary Bomberger Brown, Amy T. Moore, Nicholas Komar
School of Natural Resources: Faculty Publications
Predicting the spatial foci of zoonotic diseases is a major challenge for epidemiologists and disease ecologists. Migratory birds are often thought to be responsible for introducing some aviozoonotic pathogens such as West Nile and avian influenza viruses to a local area, but most information on how bird movement correlates with virus prevalence is anecdotal or indirect. We report that the prevalence of Buggy Creek virus (BCRV) infection in cimicid swallow bugs (Oeciacus vicarius), the principal invertebrate vector for this virus, was directly associated with the likelihood of movement by cliff swallows (Petrochelidon pyrrhonota), an amplifying host …
Ecological Correlates Of Buggy Creek Virus Infection In Oeciacus Vicarius, Southwestern Nebraska, 2004, Amy T. Moore, Eric A. Edwards, Mary Bomberger Brown, Nicholas Komar, Charles R. Brown
Ecological Correlates Of Buggy Creek Virus Infection In Oeciacus Vicarius, Southwestern Nebraska, 2004, Amy T. Moore, Eric A. Edwards, Mary Bomberger Brown, Nicholas Komar, Charles R. Brown
School of Natural Resources: Faculty Publications
Buggy Creek virus (family Togaviridae, genus Alphavirus, BCRV) is an alphavirus within the western equine encephalitis virus complex whose primary vector is the swallow bug, Oeciacus vicarius Horvath (Hemiptera: Cimicidae), an ectoparasite of the colonially nesting cliff swallow, Petrochelidon pyrrhonota, that is also a frequent host for the virus.We investigated ecological correlates of BCRV infection in 100-bug pools at 14 different swallow colony sites in southwestern Nebraska from summer 2004, by using plaque assay on Vero cells to identify cytopathic virus and reverse transcription-polymerase chain reaction to identify noncytopathic viral RNA. We found 26.7% of swallow bug pools …
Enzymes As Feed Additive To Aid In Responses Against Eimeria Species In Coccidia-Vaccinated Broilers Fed Corn-Soybean Meal Diets With Different Protein Levels, J. Parker, E. O. Oviedo Rondon, Beatrice A. Clack, S. Clemente-Hernandez, J. Osborne, J. C. Remus, H. Kettunen, H. Makivuokko, E. M. Pierson
Enzymes As Feed Additive To Aid In Responses Against Eimeria Species In Coccidia-Vaccinated Broilers Fed Corn-Soybean Meal Diets With Different Protein Levels, J. Parker, E. O. Oviedo Rondon, Beatrice A. Clack, S. Clemente-Hernandez, J. Osborne, J. C. Remus, H. Kettunen, H. Makivuokko, E. M. Pierson
Faculty Publications
This research aimed to evaluate the effects of adding a combination of exogenous enzymes to starter diets varying in protein content and fed to broilers vaccinated at day of hatch with live oocysts and then challenged with mixed Eimeria spp. Five hundred four 1-d-old male Cobb-500 chickens were distributed in 72 cages. The design consisted of 12 treatments. Three anticoccidial control programs [ionophore (IO), coccidian vaccine (COV), and coccidia-vaccine + enzymes (COV + EC)] were evaluated under 3 CP levels (19, 21, and 23%), and 3 unmedicated-uninfected (UU) negative controls were included for each one of the protein levels. All …
The Jackrabbit Dairy Review, Vikram Mistry
The Jackrabbit Dairy Review, Vikram Mistry
The Jackrabbit Dairy & Food Review
No abstract provided.
Notes On The Chrysopidae (Neuroptera) Fauna Of Ardahan, Iğdır And Kars Provinces Of Turkey, İsmai̇l Ari, Meti̇n Aktaş, Suat Kiyak
Notes On The Chrysopidae (Neuroptera) Fauna Of Ardahan, Iğdır And Kars Provinces Of Turkey, İsmai̇l Ari, Meti̇n Aktaş, Suat Kiyak
Turkish Journal of Zoology
This study was based on 558 specimens belonging to 23 species of 10 genera of Chrysopidae of the order Neuroptera. These specimens were collected from Ardahan, Iğdır and Kars provinces between 2001 and 2003. Among the species, Dichochrysa ventralis Curtis, 1834 is a new record for the Turkish Neuroptera fauna. The distribution of each species, worldwide and in Turkey, is also presented.
Otiorynchus Lederi Stierlin (Coleoptera: Curculionidae): A New Record And A New Pest In Turkey, Hi̇kmet Özbek, Levent Gülteki̇n, Genrick Davidian
Otiorynchus Lederi Stierlin (Coleoptera: Curculionidae): A New Record And A New Pest In Turkey, Hi̇kmet Özbek, Levent Gülteki̇n, Genrick Davidian
Turkish Journal of Zoology
Otiorhynchus lederi Stierlin, 1876 (Coleoptera: Curculionidae) was detected in northeastern Anatolia. This species has been known as a parthenogenetic form so far. We found in Transcaucasus and Turkey several bisexual populations of this species for the first time and we redescribed them. O. lederi is allied to Otiorhynchus erivanensis Reitter, which was described from Armenia. Diagnostic features separating these 2 species were indicated. Both of these species are new records for the Turkish fauna. Although O. lederi is a polyphagous it is a pest of currant (Ribes spp.), rose (Rosa spp.), and strawberry (Fragaria spp.) species in Erzurum province, especially …
Influence Of Visible Implant Fluorescent Elastomer (Vie) Tagging On Growth, Molting And Survival Of The Eastern White River Crayfish, Procambarus Acutus Acutus (Girard, 1852), Yavuz Mazlum
Turkish Journal of Zoology
Tag retention, growth, molting, and survival of crayfish, Procambarus acutus acutus, 35-37 mm in total length were evaluated between tagged and untagged groups. There were no significant differences in molting and survival between the tagged and untagged groups (P > 0.05). Tag retention was 100% for crayfish kept individually in plastic containers for the 60-day experimental period. The tagged group had a mean growth of 7.0 mm (molts only) while the untagged group had a mean growth of 4.0 mm (molts only). Molting rates were similar between the tagged and untagged groups. Nine molts were observed each in the tagged (n …
Allozyme Variations And Genetic Differentiation In Mesocricetus Brandti Nehring, 1898 And Mesocricetus Auratus (Waterhouse, 1839) (Mammalia: Rodentia), Nuri̇ Yi̇ği̇t, Tolga Kankiliç, Reyhan Çolak, Ercüment Çolak, Rolf Gattermann, Karsten Neumann, Şaki̇r Özkurt, Muhammed Mouradi Gharakheloo
Allozyme Variations And Genetic Differentiation In Mesocricetus Brandti Nehring, 1898 And Mesocricetus Auratus (Waterhouse, 1839) (Mammalia: Rodentia), Nuri̇ Yi̇ği̇t, Tolga Kankiliç, Reyhan Çolak, Ercüment Çolak, Rolf Gattermann, Karsten Neumann, Şaki̇r Özkurt, Muhammed Mouradi Gharakheloo
Turkish Journal of Zoology
Allozyme variations were investigated by the electrophoretic analysis of 20 gene loci in 5 populations of Mesocricetus brandti and Mesocricetus auratus from Anatolia and Iran. Of the 20 loci analysed, 11 were monomorphic and fixed for the same allele in all 5 populations, 9 loci were polymorphic, and 1 locus differed between M. auratus and M. brandti populations. The overall mean of polymorphic loci for all the populations was 24.7% (range: 5.9%-41.2%). The mean fixation index value was F_{ST} = 0.0748, indicating a 7% genetic variation in the M. brandti populations. The obtained FST values indicated that there are moderate …
Contributions To The Fauna Of Turkish Myrmeleonidae (Neuroptera, Insecta) From Ardahan, Iğdır, And Kars, İsmai̇l Ari, Meti̇n Aktaş, Suat Kiyak
Contributions To The Fauna Of Turkish Myrmeleonidae (Neuroptera, Insecta) From Ardahan, Iğdır, And Kars, İsmai̇l Ari, Meti̇n Aktaş, Suat Kiyak
Turkish Journal of Zoology
This study is based on 349 specimens belonging to 24 species of 17 genera of Myrmeleonidae of the order Neuroptera, and these insects were collected from Ardahan, Iğdır, and Kars provinces between 2001 and 2003. Among the species, Deutoleon turanicus Navas, 1927 and Distoleon luteomaculatus Hölzel, 1972 are new to the fauna of Turkish Myrmeleonidae. The distribution of each species in Turkey and in the rest of the world is presented.
Dacrydium Hyalinum (Monterosato, 1875) And Musculus Discors (Linnaeus, 1767): Two New Mytilidae (Bivalvia) Species For The Turkish Mollusc Fauna, Mesut Önen, Alper Doğan
Dacrydium Hyalinum (Monterosato, 1875) And Musculus Discors (Linnaeus, 1767): Two New Mytilidae (Bivalvia) Species For The Turkish Mollusc Fauna, Mesut Önen, Alper Doğan
Turkish Journal of Zoology
The Bivalvia (Mollusca) fauna was studied from benthic samples collected from 101 stations from various biotopes in the Turkish Aegean Sea in 2000. Two species, namely Dacrydium hyalinum (Monterosato, 1875) and Musculus discors (Linnaeus, 1767), new to the Turkish Bivalvia fauna are reported. Notes on the morphological and ecological features of these species are provided.
On New Populations Of Rana Holtzi And Rana Macrocnemis (Ranidae: Anura), İbrahi̇m Baran, Çeti̇n Ilgaz, Yusuf Kumlutaş, Kurtuluş Olgun, Azi̇z Avci, Fatma İret
On New Populations Of Rana Holtzi And Rana Macrocnemis (Ranidae: Anura), İbrahi̇m Baran, Çeti̇n Ilgaz, Yusuf Kumlutaş, Kurtuluş Olgun, Azi̇z Avci, Fatma İret
Turkish Journal of Zoology
Rana holtzi, which is only known from Karagöl at altitude 2500 m and Çinigöl at altitude 2600 m, was determined from Eğrigöl for the first time at altitude 3000 m. Thus, the distribution range of R. holtzi in the Bolkar Mountains was extended. In addition, specimens of Rana macrocnemis were recorded from Seviçova (2500 m a.s.l.), located in the Bolkar Mountains near Ereğli (Konya), for the first time. Furthermore, the village of Örtülü (Maden, Elazığ), where specimens of Rana macrocnemis were captured, is determined to be southernmost distribution point of R. macrocnemis. Mountain frog specimens captured from new localities were …
Contributions To The Knowledge Of The Oligochaeta (Annelida) Fauna Of Some Lakes In The Taurus Mountain Range (Turkey), Seray Yildiz, M. Ruşen Ustaoğlu, Süleyman Balik
Contributions To The Knowledge Of The Oligochaeta (Annelida) Fauna Of Some Lakes In The Taurus Mountain Range (Turkey), Seray Yildiz, M. Ruşen Ustaoğlu, Süleyman Balik
Turkish Journal of Zoology
Two expeditions were carried out during July 1996 and July 1997 in order to determine the Oligochaeta fauna of 16 high altitude lakes located in the Taurus Mountains in south-west Anatolia (Turkey). No previous faunistic studies exist from the Taurus Mountains regarding physico-chemical features and Oligochaeta fauna. Fifteen species were identified, comprised of the families Tubificidae (11 species), Naididae (3 species), and Lumbriculidae (1 species). Among the samples, Tubificidae were the most dominant (73% of the specimens), followed by Naididae (20%) and Lumbriculidae (7%).