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Instructions For Authors, Discovery Editors Jan 2006

Instructions For Authors, Discovery Editors

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

No abstract provided.

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Air Exchange Rate In A Horse Trailer During Road Transport, Joseph L. Purswell, Richard S. Gates, Laurie M. Lawrence, Jamey D. Jacob, Timothy S. Stombaugh, Robert J. Coleman Jan 2006

Air Exchange Rate In A Horse Trailer During Road Transport, Joseph L. Purswell, Richard S. Gates, Laurie M. Lawrence, Jamey D. Jacob, Timothy S. Stombaugh, Robert J. Coleman

Biosystems and Agricultural Engineering Faculty Publications

Horses traveling by road commonly experience heat stress conditions and poor air quality, which may be caused by insufficient ventilation; however, there are few estimates of air exchange in a horse trailer during transport. Air exchange rate was measured at ten locations within a four-horse trailer (internal volume 18.5 m3) using tracer gas decay measurement to assess the adequacy of ventilation. Three vehicle speeds (13, 48, and 97 km h-1) and three window configurations (all windows and roof vents closed, all windows open, all windows open and roof vents open forward) were tested with and without …

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Suspension Of Gametogenesis In Green Sea Urchins Experiencing Invariant Photoperiod, S. Anne Boettger, Michael G. Devin, Charles W. Walker Jan 2006

Suspension Of Gametogenesis In Green Sea Urchins Experiencing Invariant Photoperiod, S. Anne Boettger, Michael G. Devin, Charles W. Walker

Biology Faculty Publications

No abstract provided.

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Contents, Discovery Editors Jan 2006

Contents, Discovery Editors

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

No abstract provided.

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Evaluation Of Bovine Spermatid Sex Ratio By Fluorescent In Situ Hybridization, Michael Alan Stout Jan 2006

Evaluation Of Bovine Spermatid Sex Ratio By Fluorescent In Situ Hybridization, Michael Alan Stout

LSU Master's Theses

The objective of this study was to use fluorescent in situ hybridization (FISH) to determine if a skew in the sex ratio was present at the level of the bovine round spermatid. Paraffin embedded bovine testicular tissue obtained from biopsies were used to perform FISH, and the seminiferous tubules were examined. Our findings show that the skew does exist within the round spermatids. Analysis of variance on X- and Y-chromosome bearing round spermatids as affected by sex, slide, picture set, and tubule was performed. Sex showed that the variation in round spermatid sex ratio differed between slides (P = 0.0001). …

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A System For Wintering Beef Heifers Using Dried Distillers Grains, Leslie Aaron Stalker, Don C. Adams, Terry J. Klopfenstein Jan 2006

A System For Wintering Beef Heifers Using Dried Distillers Grains, Leslie Aaron Stalker, Don C. Adams, Terry J. Klopfenstein

Nebraska Beef Cattle Reports

A two-year experiment compared two systems for wintering pregnant heifers. The standard system used by the ranch served as the control (CON) and the treatment system (TRT) included a dried distillers grains based supplement. Heifers in the TRT system were heavier and had greater body condition score at end of supplementation. Calving difficulty, percentage of live calves weaned and subsequent pregnancy rate were similar between systems. Calves born to heifers in the TRT system were heavier at birth and weaning. The TRT system cost $10.47/heifer less than the CON system and resulted in equivalent or improved heifer and calf growth …

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Influence Of Feeding Frequency On Feed Intake, Growth Performance And Nutrient Utilization In European Sea Bass (Dicentrarchus Labrax) Fed Pelleted Or Extruded Diets, Derya Güroy, Emrah Deveci̇ler, Betül Kut Güroy, Ahmet Adem Teki̇nay Jan 2006

Influence Of Feeding Frequency On Feed Intake, Growth Performance And Nutrient Utilization In European Sea Bass (Dicentrarchus Labrax) Fed Pelleted Or Extruded Diets, Derya Güroy, Emrah Deveci̇ler, Betül Kut Güroy, Ahmet Adem Teki̇nay

Turkish Journal of Veterinary & Animal Sciences

In an 83-day-nutrition trial, effects of feed production technique and feeding frequency on feed intake, growth and nutrient utilization were determined in European sea bass (Dicentrarchus labrax). Three thousand six hundred fish (170 ± 2.6 g) were randomly allocated to experimental sea cages (approx. 5800 l) according to a 2 x 2 experimental plan [2 processing techniques: steam pelleted diet (P) vs. extruded diet (E); 2 feeding frequencies: twice (2) vs. 3 times (3)]. The P3 group consumed significantly (P < 0.05) more feed than the fish fed extruded diets, irrespective of feeding frequency. Growth rates of all groups did not display any significant difference (P > 0.05) in terms of final weight (FW) or specific growth rate (SGR), although there was a decreasing trend in final …

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Pond Production, Bartholomew W. Green, C. Bauer Duke Iii Jan 2006

Pond Production, Bartholomew W. Green, C. Bauer Duke Iii

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Management strategies for production of tilapia (Oreochromis sp.) in earthen or lined ponds range from chemical and/or organic fertilization only to intensive feeding. Pond water quality for each strategy is discussed. Strategies to optimize standing stock management during grow-out are presented.

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Apparent Digestibility In Vicunas Fed With Soft Straw And Alfalfa In The C.E.A.C., Felisa Capriles Apaza Jan 2006

Apparent Digestibility In Vicunas Fed With Soft Straw And Alfalfa In The C.E.A.C., Felisa Capriles Apaza

Theses and Dissertations

South American camelids are a source of fiber and meat for the inhabitants of the Andean region of Bolivia, Argentina, and Chile. When camelids are well fed they efficiently convert the Andean flora into meat with high protein content. Vicuñas have a great capacity to produce wool to be used as a high quality fiber. However, the yield of vicuña meat production is generally low. There have been several studies concerning nutritional forage sources for camelids, resulting in improved nutrition, decreased morbidity and mortality, and intensified production systems. Soft straw is a source of tough forage with low protein content. …

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Comparative Toxicosis Of Sodium Selenite And Selenomethionine In Lambs, A. K. Tiwary, B. L. Stegelmeier, K. E. Panter, L. F. James, Jeffery O. Hall Jan 2006

Comparative Toxicosis Of Sodium Selenite And Selenomethionine In Lambs, A. K. Tiwary, B. L. Stegelmeier, K. E. Panter, L. F. James, Jeffery O. Hall

Animal, Dairy, and Veterinary Science Faculty Publications

Excess consumption of selenium (Se) accumulator plants can result in selenium intoxication. The objective of the study reported here was to compare the acute toxicosis caused by organic selenium (selenomethionine) found in plants with that caused by the supplemental, inorganic form of selenium (sodium selenite). Lambs were orally administered a single dose of selenium as either sodium selenite or selenomethionine and were monitored for 7 days, after which they were euthanized and necropsied. Twelve randomly assigned treatment groups consisted of animals given 0, 1, 2, 3, or 4 mg of Se/kg of body weight as sodium selenite, or 0, 1, …

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Glucocorticoid Hormone Levels Increase With Group Size And Parasite Load In Cliff Swallows, Samrrah A. Raouf, Linda C. Smith, Mary Bomberger Brown, John C. Wingfield, Charles R. Brown Jan 2006

Glucocorticoid Hormone Levels Increase With Group Size And Parasite Load In Cliff Swallows, Samrrah A. Raouf, Linda C. Smith, Mary Bomberger Brown, John C. Wingfield, Charles R. Brown

School of Biological Sciences: Faculty Publications

Animals often cope with adverse events by releasing glucocorticoid hormones, which in turn promote increased energy assimilation. In captive animals, crowding also leads to increased glucocorticoid activity, probably because of increased levels of social competition. We investigated how group size and ectoparasite infestations affected endogenous levels of the glucocorticoid hormone, corticosterone, in colonial cliff swallows, Petrochelidon pyrrhonota, in southwestern Nebraska, USA. Parasites were removed from some colonies by fumigating nests. Baseline levels of corticosterone in breeding adults varied significantly with whether parasites were present, colony size (measured by total number of active nests at a site), and nesting stage. …

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Changes In Demersal Wild Fish Aggregations Beneath A Sea-Cage Fish Farm After The Cessation Of Farming, Fernando Tuya, Pablo Sanchez-Jerez, Tim Dempster, Arturo Boyra, Ricardo Haroun Jan 2006

Changes In Demersal Wild Fish Aggregations Beneath A Sea-Cage Fish Farm After The Cessation Of Farming, Fernando Tuya, Pablo Sanchez-Jerez, Tim Dempster, Arturo Boyra, Ricardo Haroun

School of Natural Sciences Publications

Demersal, non-cryptic, wild fish were counted in replicate 100 m2 transects beneath a floating sea-cage fish farm and two nearby sandy locations at Gran Canaria (Canary Islands, eastern Atlantic) four times before and after the cessation of farming. Cessation of farming involved the removal of farmed fish and ceasing of the daily feeding, although farm structures (cages and moorings) remained. A “beyond-BACI” sampling design provided the framework to detect the effect of the cessation of farming, which produced qualitative and quantitative changes in the composition and structure of the fish assemblages beneath the sea-cage fish farm compared with two nearby …

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Effect Of Refrigerated Storage On Fillet Lipid Quality Of Rainbow Trout (Oncorhynchus Mykiss W.) Fed A Diet Containing Different Levels Of Dl A-Tocopherol Acetate, Mustafa Yildiz, Erdal Şener, Hüseyi̇n Gün Jan 2006

Effect Of Refrigerated Storage On Fillet Lipid Quality Of Rainbow Trout (Oncorhynchus Mykiss W.) Fed A Diet Containing Different Levels Of Dl A-Tocopherol Acetate, Mustafa Yildiz, Erdal Şener, Hüseyi̇n Gün

Turkish Journal of Veterinary & Animal Sciences

The effect of refrigerated storage at 1 ± 0.3 ºC on vitamin E level, fatty acid composition and lipid oxidation of fillets was studied in 3 groups of rainbow trout fed diets supplemented with increasing levels (100, 300 and 500 mg kg^{-1} diet, respectively) of \alpha-tocopherol acetate as antioxidant. Fish (initial mean weight 131 ± 1.0 g) were fed experimental diets for 58 days and reached a mean final weight of 299 ± 6.1 g, with growth differences among the 3 experimental groups being insignificant (P > 0.05). Fillet samples of fish were analyzed fresh (on day 0) or after storage …

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Determination Of The Primary Levels Of The Residues Of The Seeds Of Wheat, Maize, And Barley For The Elaboration Of The Food Mixture For Rabbits, Aida Esperanza Morejon Jacome Jan 2006

Determination Of The Primary Levels Of The Residues Of The Seeds Of Wheat, Maize, And Barley For The Elaboration Of The Food Mixture For Rabbits, Aida Esperanza Morejon Jacome

Theses and Dissertations

The present investigation was done in the parish of Chaltura, Granja "La Pradera" which belongs to the University Técnica del Norte. The main objective of this investigation was to determine the primary levels of the residues of the seeds of wheat, maize, barley for the elaboration of the food mixture for rabbits. The evaluated variables, food consumed, weight gain, food value, protein percentage, production cost per treatment. Previously to the initiation of the field phase bromatological analysis were done on the three food mixtures in the National Institute of Farming Investigation, Quality and Nutrition Area. The treatments were four: TI …

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An Examination Of Seasonal Growth And Survivorship Of Sigmodon Hispidus In Southeastern Virginia, Heather Alyssa Green Jan 2006

An Examination Of Seasonal Growth And Survivorship Of Sigmodon Hispidus In Southeastern Virginia, Heather Alyssa Green

Biological Sciences Theses & Dissertations

A reexamination of specific population dynamic aspects of Sigmodon hispidus, the hispid cotton rat, is necessary in order to gain additional knowledge and perspective on this species in its northernmost distribution on the east coast of the United States. Previous studies of Virginia cotton rats were based on data from necropsies, which do not allow for the determination of certain population characteristics, such as density, growth, and survival. General population trends and rates of growth and survival in males and females throughout the seasons in Virginia will also provide a basis for comparison with populations of cotton rats in …

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Movement Patterns And Habitat Usage Of Shark Bay Dugongs, David K. Holley Jan 2006

Movement Patterns And Habitat Usage Of Shark Bay Dugongs, David K. Holley

Theses: Doctorates and Masters

In order to define small and large scale spatial and temporal individual movement patterns of dugongs (Dugong dugon) within the Shark Bay World Heritage Property (SBWHP) a total of 19 dugongs were fitted with remote location recording and transmitting devices. Combined locations from all units totalled over 10,000 locations. This spatial and temporal data was used to define movement patterns of dugongs within Shark Bay as well as areas of high use deemed to be indicative of foraging activity. Platform Transmitting Terminals (PTT?s) using the ARGOS location collection system tracked animals over large temporal scales with 4 animals tracked up …

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A Novel Yogurt Product With Lactobacillus Acidophilus, Senthil Ganesh Jan 2006

A Novel Yogurt Product With Lactobacillus Acidophilus, Senthil Ganesh

LSU Master's Theses

Health benefits of Lactobacillus acidophilus include providing immune support for infections or cancer, providing a healthy replacement of good bacteria in the intestinal tract following antibiotic therapy, reducing occurrence of diarrhea in humans, aiding in lowering cholesterol and improving the symptoms of lactose intolerance. Consumer demand exists for new dairy products. There are several types of yogurt like stir curd, set curd and drinkable yogurt and they all need to be refrigerated. Moreover there are very few dairy products that can be stored at room temperature and not many dairy foods are finger foods. A novel yogurt product like a …

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Gamete And Cell Technologies For Use In Biological Resource Banking, Liesl Nel-Themaat Jan 2006

Gamete And Cell Technologies For Use In Biological Resource Banking, Liesl Nel-Themaat

LSU Doctoral Dissertations

Biological resource banking is becoming important for endangered species conservation. A series of experiments were conducted to address issues concerning collection and utilization of biomaterials from Gulf Coast Native (GCN) sheep (model species) (Ovis aries) and Eland antelope (Taurotragus oryx). In the first experiment, two ejaculates were collected 10 minutes apart from each of five rams three times a week for three weeks to maximize output and minimize handling time. Semen volume, concentration and total number of spermatozoa were significantly greater in first ejaculates, whereas pre-cooled, cooled and post-thaw motility, as well as sperm survival, were greater in second ejaculates. …

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The Effect Of A Condensed Tannin Containing Forage, Sericea Lespedeza On Existing And Challenge Infections Of Haemonchus Contortus In Sheep, Leigh Ann Chafton Jan 2006

The Effect Of A Condensed Tannin Containing Forage, Sericea Lespedeza On Existing And Challenge Infections Of Haemonchus Contortus In Sheep, Leigh Ann Chafton

LSU Master's Theses

Haemonchus contortus is one of the most threatening parasites to small ruminant production. Control has traditionally relied on the use of anthelmintics. Control has waned because the worm population has developed resistance to most of the currently available anthelmintics and alternative control measures are needed. Current consumer pressure is to reduce the use of chemicals in agricultural products, thus pushing control methods to more natural and acceptable approaches. One such approach is the feeding of condensed tannin containing forages either as fresh forage or dried products (hay, meal, pellets, etc). This study was conducted to determine the effect of a …

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Comparing Bermudagrass And Bahiagrass Cultivars At Different Stages Of Harvest For Dry Matter Yield And Nutrient Content, Ryan Thomas Dore' Jan 2006

Comparing Bermudagrass And Bahiagrass Cultivars At Different Stages Of Harvest For Dry Matter Yield And Nutrient Content, Ryan Thomas Dore'

LSU Master's Theses

Rapid growth of warm-season grasses such as bermudagrass (Cynodon dactylon) and bahiagrass (Paspalum notatum) is associated with a decline in their nutritional value. This study was initiated to provide production and composition data with different cultivars of bermudagrass (common, Russell, Jiggs) and bahiagrass (Tifton-9, Pensacola, Argentina). Dry matter (DM), ash, crude protein (CP), neutral detergent fiber (NDF), and acid detergent fiber (ADF) composition and production were evaluated every two weeks for a ten-week period on six different cultivars. Also, Russell bermudagrass was evaluated in a second trial very similar to the first trial for composition and production but was started …

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The Future Of The Beef Industry, Gary C. Smith Dec 2005

The Future Of The Beef Industry, Gary C. Smith

Range Beef Cow Symposium

Weaber and Miller (2004) said “The structure of the cattle industry has changed dramatically over time, particularly in the packing and feeding segments. It’s a change driven by market dynamics that require participants to minimize production costs while at the same time, maintaining or improving quality. Producers that have met these two demands have remained in business through the various ‘boom or bust’ cycles in the beef industry.”

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New Demands On Beef Products, Jim Coakley Dec 2005

New Demands On Beef Products, Jim Coakley

Range Beef Cow Symposium

The natural beef business is founded on the idea of providing food products that are an alternative to commonplace and are inherently high quality. A brand that is built on trust of the company and its suppliers to produce food products using specified raising practices that measure up to what the consumer desires and believes to be best for family and planet.
In 1989 the company wrote a mission statement that said:
By understanding our customers we will lead in the profitable marketing of natural and organic products using ecologically focused principles.

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Management Strategies To Reduce Embryonic Loss, Tom Geary Dec 2005

Management Strategies To Reduce Embryonic Loss, Tom Geary

Range Beef Cow Symposium

Embryonic loss may represent the single greatest economic loss for cow/calf producers. With 40,000,000 beef cows and heifers exposed to breeding each year in the U.S., annual losses exceed $1.2 billion. The mechanisms involved in pregnancy establishment and maintenance are complex, and based on the literature, we have made little progress reducing embryo wastage in the past 90 years. This paper will focus on when and why pregnancy failures occur and discuss some management practices that may alleviate these losses.

In beef cattle, it is generally accepted that fertilization rates to a single service are between 90 and 100% regardless …

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Supplementation, Winter Cow Nutrition, Don C. Adams Dec 2005

Supplementation, Winter Cow Nutrition, Don C. Adams

Range Beef Cow Symposium

It is generally accepted that protein supplements help beef cows efficiently utilize dormant forages and maintain body condition score (BCS) during fall-winter grazing. Additionally, protein supplements fed during fall and winter may impact subsequent cow reproductive performance and calf growth. Applications of supplementation in different extended grazing systems are presented.

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Getting The Most Out Of A Vaccine Program, Charles L. Stoltenow Dec 2005

Getting The Most Out Of A Vaccine Program, Charles L. Stoltenow

Range Beef Cow Symposium

Vaccination programs have long been touted to be the answer to all your cattle disease problems. It isn’t that way. Vaccination is only one of many tools that producers and ranchers have at their disposal to try and manage an efficient and profitable operation. There are many other tools at their disposal.

When discussing vaccines, I have a favorite quote from Dr. Tim Richards at Kamuela, HI. He was the veterinarian for Parker ranch, the largest ranch in the United States. When Dr. Richards made that quote, Parker ranch was sending their feeder cattle by boat to the mainland for …

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Key Indicators Of Success In Ranching: A Balanced Approach, Barry H. Dunn, Matthew Etheredge Dec 2005

Key Indicators Of Success In Ranching: A Balanced Approach, Barry H. Dunn, Matthew Etheredge

Range Beef Cow Symposium

While it has often been recognized that a ranch is greater than the sum of its parts, measuring and reporting the performance of the parts seems to be the common method of measuring the success of a ranch. Depending on the interest of the owner and manager, emphasis may be focused on cattle performance, or range management, or financial performance, or individual or personal accomplishments. Seldom does the discussion of success encompass some overarching measurement. The management tool known as “The Balanced Scorecard,” first developed by Robert S. Kaplin and David P. Norton in the early 1990s (Kaplin and Norton, …

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Determining The Best Time To Wean, Steve Paisley, Kellie Chichester Dec 2005

Determining The Best Time To Wean, Steve Paisley, Kellie Chichester

Range Beef Cow Symposium

Production analysis and survey data suggests that the greatest contribution to annual cow production costs in the Northern Plains is harvested and purchased feed (Taylor and Field, 1995). Harvested hay is not only expensive to purchase, but it is expensive to put up and feed. Dunn (2002) showed that interest and depreciation on capital (required to handle hay) were major factors limiting profitability of ranching operations. Profit margins in cow/calf production are slim due to high production costs (Taylor and Field, 1995) and lost opportunity to capture value from marketable ranch products (NASS, 1999). Low input systems, or systems that …

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A Producer’S Experience On Moving Calving Date, Mark H. Mccarty Dec 2005

A Producer’S Experience On Moving Calving Date, Mark H. Mccarty

Range Beef Cow Symposium

I grew up on a purebred operation, where we did everything the hard way. If it involved more labor, more overhead, and more inputs we did it that way. Calving season was of course the most labor intensive, coldest time of the year. We calved every cow through the barn and watched them around the clock. Each calf was weighed, tagged, vaccinated at birth, and not to mention probably nursed. Now we calve around 2,500 commercial cows and sometimes we check them, but most of the time we don’t even see the calves until branding time.

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State Of The Beef Industry And Cattle Market Situation And Outlook Dec 2005

State Of The Beef Industry And Cattle Market Situation And Outlook

Range Beef Cow Symposium

No abstract provided.

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The Mineral Status And Health Of Sheep Grazing On Neutralised Used Acid Amended Pasture, Gerard Smith Dec 2005

The Mineral Status And Health Of Sheep Grazing On Neutralised Used Acid Amended Pasture, Gerard Smith

Animal production and livestock published reports

No abstract provided.

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