Open Access. Powered by Scholars. Published by Universities.®

Animal Sciences Commons™

Open Access. Powered by Scholars. Published by Universities.®

2021

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 961 - 990 of 1251

Full-Text Articles in Animal Sciences

Kinorhynchs From Sandy Coastal Habitats In Turkey, With The Description Of A New Pan-Mediterranean Species Of Echinoderes (Cyclorhagida: Echinoderidae), Martin Vinther Sørensen, Maria Herranz, Fernando Pardos, Furkan Durucan Jan 2021

Kinorhynchs From Sandy Coastal Habitats In Turkey, With The Description Of A New Pan-Mediterranean Species Of Echinoderes (Cyclorhagida: Echinoderidae), Martin Vinther Sørensen, Maria Herranz, Fernando Pardos, Furkan Durucan

Turkish Journal of Zoology

Kinorhynchs from eight sandy, shallow water localities along the west and south coasts of Turkey were examined. The study resulted in the finding of six different species: Two species, Echinoderes gerardi and Cephalorhyncha flosculosa were known from Turkey, two species, Echinoderes riedli and Campyloderes vanhoeffeni were known from the Mediterranean, but are new to Turkey, and two species, Echinoderes sp. and E. shahmaranae sp. nov. are new to science. Echinoderes sp. resembles E. charlotteae from the Gulf of Mexico, but differs at some minor points. However, since only a single specimen was available, only diagnostic details, but no formal description, …

Go to article

Infestation And Effect Of Parasitic Isopod Epipenaeon Ingens Ingens Nobili, 1906 Oncommercial Shrimp Species In The Eastern Mediterranean: A Case Study Of The Populationof Brown Shrimp Penaeus Aztecus Ives, 1891, Mehmet Cengi̇z Deval, Fatma Gonca Koçanci Jan 2021

Infestation And Effect Of Parasitic Isopod Epipenaeon Ingens Ingens Nobili, 1906 Oncommercial Shrimp Species In The Eastern Mediterranean: A Case Study Of The Populationof Brown Shrimp Penaeus Aztecus Ives, 1891, Mehmet Cengi̇z Deval, Fatma Gonca Koçanci

Turkish Journal of Zoology

Monthly samples of seven species of penaeid shrimps, namely, Penaeus aztecus (Ives, 1891), Penaus hathor (Burkenroad, 1959) Penaus japonicus (Spence Bate,1888), Penaus kerathurus (Forskal,1775), Penaus semisulcatus (De Haan,1844), Metapenaeus monoceros (Fabricus, 1798) and Metapenaeopsis aegyptia (Galil & Golani, 1990) were collected from Antalya Bay in the Eastern Mediterranean Sea from March, 2019 through March, 2020. Except for P. aztecus and P. semisulcatus, no other shrimp species were infected with the parasitic isopod Epipenaeon ingens ingens. Of the 3043 P. aztecus shrimp inspected, 541 individuals were infected (17.8%) with the bopyrid parasite E. ingens ingens. However, the annual infestation rate in …

Go to article

The Sicilian Rock Partridge: Latest Data On Genetic Integrity From Four Different Relict Areas, Giusi Macaluso, Claudia Manno, Mario Lo Valvo, Marco Tolone, Salvatore Mastrangelo, Roberto Puleio, Guido Ruggero Loria Jan 2021

The Sicilian Rock Partridge: Latest Data On Genetic Integrity From Four Different Relict Areas, Giusi Macaluso, Claudia Manno, Mario Lo Valvo, Marco Tolone, Salvatore Mastrangelo, Roberto Puleio, Guido Ruggero Loria

Turkish Journal of Zoology

Sicily (Italy) hosts a "relict", endemic population of the birds Alectoris graeca whitakeri commonly known as Sicilian Rock Partridge. In the last decades, due to the risk of restocking with other European and Asiatic species for hunting purpose, a study was carried out to investigate the potential risk of hybridisation. The mtDNA control-region and nuclear microsatellites were genotyped. Due to the importance of the species, samples were mainly characterized by feather and stool samples, and rarely by carcasses found in the environment, from year 2011 to 2012. A panel of 7 microsatellite loci was validated. Three multiplexes that allowed the …

Go to article

Small Unmanned Aircraft Systems Acoustic Analysis For Noninvasive Marine Mammal Response: An Exploratory Field Study, David Thirtyacre, Gennifer Brookshire, Sarah Callan, Brittany Arvizu, Patrick Sherman Jan 2021

Small Unmanned Aircraft Systems Acoustic Analysis For Noninvasive Marine Mammal Response: An Exploratory Field Study, David Thirtyacre, Gennifer Brookshire, Sarah Callan, Brittany Arvizu, Patrick Sherman

International Journal of Aviation, Aeronautics, and Aerospace

As in countless other fields of human endeavor, small unmanned aircraft systems (sUAS) have the potential to benefit pinniped (Pinnipedia; e.g., Phocidae [seals], Otariidae [sea lions], and Odobenidae [walruses]) response efforts. The employment of sUAS could give responders a close-up look at animals in distress in order to determine their condition as well as develop a response strategy. However, unlike other subjects that are regularly inspected by sUAS (e.g., croplands and civil infrastructure) pinnipeds may respond to the distinctive sound generated by small, multirotor sUAS. This reaction may include retreating into the water en masse, which could put …

Go to article

Statistics Used In The Nebraska Beef Cattle Report And Their Purpose Jan 2021

Statistics Used In The Nebraska Beef Cattle Report And Their Purpose

Nebraska Beef Cattle Reports

The purpose of beef cattle and beef product research at UNL is to provide reference information that represents the various populations (cows, calves, heifers, feeders, carcasses, retail products, etc) of beef production. Obviously, the researcher cannot apply treatments to every member of a population; therefore he/she must sample the population. The use of statistics allows the researcher and readers of the Nebraska Beef Cattle Report the opportunity to evaluate separation of random (chance) occurrences and real biological effects of a treatment. Following is a brief description of the major statistics used in the beef report. For a more detailed description …

Go to article

Dietary Impact On Antibiotic Resistance In Feedlot Manure, Maranatha Zelt, Amy Schmidt, Noelle Mware, Xu Li, Galen E. Erickson Jan 2021

Dietary Impact On Antibiotic Resistance In Feedlot Manure, Maranatha Zelt, Amy Schmidt, Noelle Mware, Xu Li, Galen E. Erickson

Nebraska Beef Cattle Reports

There is a growing public concern regarding antibiotic resistance and the use of antibiotics, including in livestock management. Understanding the ecology of antibiotic resistance among microbes, identifying resistance gene reservoirs, and implementing antibiotic resistance mitigation practices in livestock production are critical to protecting animal and human health while meeting increasing food demands. This research is one of several studies seeking to assess risk for livestock- to- human transfer of antibiotic resistance and to identify mechanisms for reducing that risk where possible. This study evaluated the impact of forage concentration and supplemental essential oil in beef cattle finishing diets on antibiotic …

Go to article

Pseudomonas Survive Thermal Processing And Grow During Vacuum Packaged Storage In An Emulsified Beef System, Samuel C. Watson, Rebecca A. Furbeck, Byron D. Chaves, Gary A. Sullivan Jan 2021

Pseudomonas Survive Thermal Processing And Grow During Vacuum Packaged Storage In An Emulsified Beef System, Samuel C. Watson, Rebecca A. Furbeck, Byron D. Chaves, Gary A. Sullivan

Nebraska Beef Cattle Reports

New research has suggested the ability of Pseudomonas, a common spoilage microorganism, to grow in cooked beef products stored under vacuum which challenges the traditional understanding of the role of Pseudomonas during cooked beef spoilage. Understanding the mechanisms of survival and growth of Pseudomonas in these products is crucial for improving shelf life. The objective of this experiment was to determine Pseudomonas survival in a thermally processed, emulsified cooked beef model system. After eight weeks of refrigerated storage, Pseudomonas was recovered from cooked emulsified beef, indicating the potential for Pseudomonas to survive thermal processing and cause spoilage in cooked vacuum …

Go to article

Accelerated Dry Aging Under Anaerobic Conditions, Joseph A. Sonderman, Soon K. Lau, Felipe A. Ribeiro, David M. Velasco, Nicolas A. Bland, Nicolas J. Herrera, Morgan L. Henriott, Jeyamkondan Subbiah, Chris Calkins Jan 2021

Accelerated Dry Aging Under Anaerobic Conditions, Joseph A. Sonderman, Soon K. Lau, Felipe A. Ribeiro, David M. Velasco, Nicolas A. Bland, Nicolas J. Herrera, Morgan L. Henriott, Jeyamkondan Subbiah, Chris Calkins

Nebraska Beef Cattle Reports

The purpose of dry aging is to develop novel favors and other sensory characteristics different from wet aged meat. However, leaving meat exposed to air for an extended period of time can have negative effects on meat quality. As the meat is exposed to oxygen for an extended period of time, lipids are oxidized resulting in compounds that negatively affect favor. In this study, oxygen concentration was regulated along with time, temperature, humidity, and air flow. The purpose of oxygen regulation was to determine the effect of oxidation on the quality, specifically flavor preference, of dry aged meats. Sensory analysis …

Go to article

Economic Analysis Of Increased Corn Silage Inclusion In Beef Finishing Cattle, Hannah C. Wilson, J. C. Macdonald, Andrea K. Watson, Terry Klopfenstein, Galen E. Erickson Jan 2021

Economic Analysis Of Increased Corn Silage Inclusion In Beef Finishing Cattle, Hannah C. Wilson, J. C. Macdonald, Andrea K. Watson, Terry Klopfenstein, Galen E. Erickson

Nebraska Beef Cattle Reports

An economic analysis was conducted to assess the feasibility of feeding greater inclusions of corn silage in finishing diets. Cattle were fed two inclusions of corn silage (15 and 45% of diet dry matter) with or without tylosin. Cattle fed 15% corn silage with tylosin had the best feed conversion, 15 % corn silage without tylosin was intermediate, and both 45% corn silage with and without tylosin had the poorest feed conversion. Feeding corn silage at greater inclusions decreased ADG but increased final body weight when fed to an equal fatness (28 days longer). However, feeding corn silage at 45% …

Go to article

Impact Of Days Fed On Holstein Bull And Steer Performance And Cutability Of Cattle Pen- Fed Organic Diets, Elizabeth A. Schumacher, Braden C. Troyer, Bradley M. Boyd, Levi Mcphillips, J. C. Macdonald, Andrea K. Watson, Terry Klopfenstein, Galen E. Erickson Jan 2021

Impact Of Days Fed On Holstein Bull And Steer Performance And Cutability Of Cattle Pen- Fed Organic Diets, Elizabeth A. Schumacher, Braden C. Troyer, Bradley M. Boyd, Levi Mcphillips, J. C. Macdonald, Andrea K. Watson, Terry Klopfenstein, Galen E. Erickson

Nebraska Beef Cattle Reports

Performance, carcass characteristics, and total meat yield of Holstein bulls and steers were compared in a simulated organic production system with the goal of producing ground beef. Holstein bulls (n = 120, initial BW = 487 lb) and steers (n = 120, initial BW = 471 lb) of the same age were blocked by BW and assigned randomly to be harvested at 308, 343, 378, and 413 days on feed. After harvest, all meat o" the carcass was considered trim and was collected and weighed to calculate total trim yield. Bulls gained faster and had greater live body weight, carcass …

Go to article

Training Improves The Reliability Of Temperament Assessment In Cattle, Jamie T. Parham, Jessica J. Schmidt, Ronald M. Lewis Jan 2021

Training Improves The Reliability Of Temperament Assessment In Cattle, Jamie T. Parham, Jessica J. Schmidt, Ronald M. Lewis

Nebraska Beef Cattle Reports

Accurate and precise measurement of docility in cattle is paramount when including temperament as a criterion for selection. The value of training individuals in assigning a docility score was evaluated by comparing the reliability of individual assessments of temperament in beef cattle before and after various instructional methods. Preceding training, participants’ assessment of cattle behavior, videoed while each heifer was restrained in a chute, was not impacted by age, gender, or pre- existing cattle handling experience. Groups of participants that received additional training were more accurate and precise in evaluating temperament, regardless of training method, compared to those without. No …

Go to article

Mineral Concentrations Of Forages For Livestock In Nebraska And South Dakota, Rebecca J. Kern, John W. Kern, Hannah M.G. Dorn, Carrie E. Putnam, Janna J. Block, Adele A. Harty, M. E. Drewnoski Jan 2021

Mineral Concentrations Of Forages For Livestock In Nebraska And South Dakota, Rebecca J. Kern, John W. Kern, Hannah M.G. Dorn, Carrie E. Putnam, Janna J. Block, Adele A. Harty, M. E. Drewnoski

Nebraska Beef Cattle Reports

Forage samples from Nebraska and South Dakota submitted to Ward Laboratories, Inc. from 2012– 2019 were analyzed for mineral concentrations. Samples were categorized by forage species, quality based on protein content, and mineral concentration based on requirements for lactating beef cows. ! e data indicate that copper and zinc are frequently deficient across all species and levels of forage quality, emphasizing the need for supplementation. Except for magnesium, macro- mineral deficiencies are less likely to occur when feeding high quality forages in Nebraska and South Dakota. Corn feedstuffs are particularly likely to result in mineral deficiencies if fed without mineral …

Go to article

Evaluation Of Models Used To Predict Dry Matter Intake In Forage- Based Diets, Aksel Wiseman, Andrea K. Watson, Rick Stock, Terry Klopfenstein Jan 2021

Evaluation Of Models Used To Predict Dry Matter Intake In Forage- Based Diets, Aksel Wiseman, Andrea K. Watson, Rick Stock, Terry Klopfenstein

Nebraska Beef Cattle Reports

Accurately predicting intake is critical to model performance of cattle in order to formulate diets to meet nutritional requirements. Modeling systems must be accurate in order to provide correct information to producers. Multiple studies with growing cattle consuming forage- based diets were summarized. Actual gain and weights of the cattle were used to determine predicted dry matter intake using the Beef Cattle Nutrient Requirements Model (2016). ! e predicted dry matter intakes were compared to observed dry matter intakes to determine accuracy of the prediction model. ! e model over predicted intakes at low TDN and under predicted intakes at …

Go to article

Winter Growth Rate And Timing Of Marketing On Economics Of Yearling Systems, Michael Merical, M. E. Drewnoski, Jay Parsons Jan 2021

Winter Growth Rate And Timing Of Marketing On Economics Of Yearling Systems, Michael Merical, M. E. Drewnoski, Jay Parsons

Nebraska Beef Cattle Reports

Economic analyses were conducted examining 18 years of Nebraska monthly- average auction data to ! nd the e" ects of certain management decisions on the pro! tability of yearling production systems. A 2×2 experimental design was used to examine four possible scenarios. $ e variables were either fast winter growth (daily gain, 2.0 lb/ day) or slow winter growth (daily gain, 0.8 lb/day), and either a September or a July marketing date. In addition to pro! tability, risk management was also examined in this study. Average pro! tability of all scenarios was good, ranging from $112 to $143 per calf. …

Go to article

Impact Of Masters Choice Corn Silage On Nutrient Digestion In Growing Cattle, Jiehua Xiong, Mitch M. Norman, Hannah C. Wilson, Caleb Crabtree, Galen E. Erickson Jan 2021

Impact Of Masters Choice Corn Silage On Nutrient Digestion In Growing Cattle, Jiehua Xiong, Mitch M. Norman, Hannah C. Wilson, Caleb Crabtree, Galen E. Erickson

Nebraska Beef Cattle Reports

A digestion study was conducted to evaluate Masters Choice corn silage hybrids on nutrient digestibility in growing beef steers. ! e three hybrids evaluated were a conventional hybrid (CON) commonly grown in Eastern Nebraska which served as the control, Masters Choice hybrid MCT6365 RIB (MC1) that has been selected to improve " ber and starch digestion and Masters Choice hybrid MCT6733 GT3000 (MC2) selected to improve " ber digestion. Treatment diets consisted of 80% of the diet dry matter (DM) of each corn silage hybrid. Steers fed MC1 corn silage had the greatest organic matter (OM), energy digestibility, and digestible …

Go to article

Distal Excurrent Ducts And Penile Morphology Of The Urogenital System In The Mississippi Mud Turtle, Kinosternon Subrubrum Hippocrepis (Chelonia:Kinosternidae), Stanley E. Trauth, Michael V. Plummer Jan 2021

Distal Excurrent Ducts And Penile Morphology Of The Urogenital System In The Mississippi Mud Turtle, Kinosternon Subrubrum Hippocrepis (Chelonia:Kinosternidae), Stanley E. Trauth, Michael V. Plummer

Journal of the Arkansas Academy of Science

We examined the distal excurrent ductal morphology and penile anatomy of the urogenital system in the Mississippi Mud Turtle, Kinosternon subrubrum hippocrepis, from a small sample of individuals collected in Arkansas in order to provide additional information regarding turtle urogenital anatomy. Specifically, we focused on the basic anatomy and histology of distal excurrent ducts (ductus deferens and ureter), associated structures (urogenital papillae), and penile histology in this kinosternid turtle. In addition, we provide an overview of the gross urogenital anatomy in this turtle, given that little detailed information exists on this topic in the chelonian literature.

Go to article

Advancing Applied Research In Conservation Criminology Through The Evaluation Of Corruption Prevention, Enhancing Compliance, And Reducing Recidivism, Jessica S. Kahler, Joseph W. Rivera, Zachary T. Steele, Pilar Morales-Giner, Christian J. Rivera, Carol F. Ahossin, Ashpreet Kaur, Diane J. Episcopio-Sturgeon Jan 2021

Advancing Applied Research In Conservation Criminology Through The Evaluation Of Corruption Prevention, Enhancing Compliance, And Reducing Recidivism, Jessica S. Kahler, Joseph W. Rivera, Zachary T. Steele, Pilar Morales-Giner, Christian J. Rivera, Carol F. Ahossin, Ashpreet Kaur, Diane J. Episcopio-Sturgeon

Biological Sciences Faculty Publications

Concomitant with an increase in the global illegal wildlife trade has been a substantial increase in research within traditional conservation-based sciences and conservation and green criminology. While the integration of criminological theories and methods into the wildlife conservation context has advanced our understanding of and practical responses to illegal wildlife trade, there remain discrepancies between the number of empirical vs. conceptual studies and a disproportionate focus on a few select theories, geographical contexts, and taxonomic groups. We present three understudied or novel applications of criminology and criminal justice research within the fields of fisheries, forestry, and wildlife conservation. First, we …

Go to article

Comparison Of Growth Performance And Meat Quality Traits Of Commercial Cross-Bred Pigs Versus The Large Black Pig Breed, Yongjie Wang, Keshari Thakali, Palika Morse, Sarah Shelby, Jinglong Chen, Jason Apple, Yan Huang Jan 2021

Comparison Of Growth Performance And Meat Quality Traits Of Commercial Cross-Bred Pigs Versus The Large Black Pig Breed, Yongjie Wang, Keshari Thakali, Palika Morse, Sarah Shelby, Jinglong Chen, Jason Apple, Yan Huang

Animal Science Faculty Publications and Presentations

The meat quality of different pig breeds is associated with their different muscle tissue physiological processes, which involves a large variety of genes related with muscle fat and energy metabolism. Understanding the differences of biological processes of muscle after slaughter is helpful to reveal the meat quality development of different breeds. Therefore, eight native Large Black pigs (BP), with high fat content in meat, and seven cross-bred commercial pigs (CP), which had a high feed efficiency with high lean meat, were used to investigate the differences in their meat quality and RNA transcriptomes. The average daily gain (ADG) and hot …

Go to article

Dietary Organic Acids Modulate Gut Microbiota And Improve Growth Performance Of Nursery Pigs, Xiaoyuan Wei, Kristopher A. Bottoms, Hans H. Stein, Laia Blavi, Casey L. Bradley, Jon Bergstrom, Joshua Knapp, Robert Story, Charles Maxwell, Tsungcheng Tsai, Jiangchao Zhao Jan 2021

Dietary Organic Acids Modulate Gut Microbiota And Improve Growth Performance Of Nursery Pigs, Xiaoyuan Wei, Kristopher A. Bottoms, Hans H. Stein, Laia Blavi, Casey L. Bradley, Jon Bergstrom, Joshua Knapp, Robert Story, Charles Maxwell, Tsungcheng Tsai, Jiangchao Zhao

Animal Science Faculty Publications and Presentations

Feed additives have been suggested to improve animal growth performance through modulating the gut microbiota. The hypothesis of this study was that the combination of two organic acids would exert synergistic effects on the growth performance and gut microbiota of weaning pigs. To test this hypothesis, we followed 398 weaning pigs from two university experiment stations (University of Illinois at Urbana-Champaign (UIUC) and University of Arkansas (UA)) to determine the effects of increasing levels (0%, 0.035%, 0.070%, and 0.105%) of sodium butyrate combined with 0.5% benzoic acid on the growth performance of nursery pigs. At the UA, an additional negative …

Go to article

Evaluating The Effects Of Atlantic Menhaden Management And Environmental Change On The Northwest Atlantic Ocean Ecosystem, Maxwell T. Grezlik Jan 2021

Evaluating The Effects Of Atlantic Menhaden Management And Environmental Change On The Northwest Atlantic Ocean Ecosystem, Maxwell T. Grezlik

Cal Poly Humboldt theses and projects

Atlantic Menhaden (Brevoortia tyrannus) is an abundant forage fish species whose management has recently shifted from using single species reference points to ecological reference points. This type of management allows for the ecological role (e.g., supporting predators) of the species to be considered when making management decisions, and is part of a growing global movement towards ecosystem-based fisheries management. One model that aided in this transition from single species to ecological reference points was the Northwest Atlantic Continental Shelf (NWACS13) model created using Ecopath with Ecosim (Buchheister et al. 2017). Here, I updated and expanded the NWACS13 model …

Go to article

Ecological And Social Drivers Of Mexican Gray Wolf (Canis Lupus Baileyi) Home Range Patterns Across Spatiotemporal Scales, Evelyn M. Lichwa Jan 2021

Ecological And Social Drivers Of Mexican Gray Wolf (Canis Lupus Baileyi) Home Range Patterns Across Spatiotemporal Scales, Evelyn M. Lichwa

Cal Poly Humboldt theses and projects

Elucidating factors influencing home range size are fundamental relationships that can be described for any wildlife species, particularly those of conservation concern. The Mexican gray wolf (Canis lupus baileyi) is an endangered sub-species of the gray wolf whose home range patterns have not yet been studied. I estimated home range sizes for 22 Mexican wolf packs using Brownian Bridge Movement Models (95% UD). Generalized linear mixed effect models were used to evaluate environmental and social variables across four timeframes. Annual home range size was inversely related to human density and tree cover. During the denning period, home range …

Go to article

A Spatiotemporal Assessment Of Fish Assemblage Response To Land-Use Change And The Evaluation Of Edna Metabarcoding For Describing Diverse Fish Communities, Timothy M. Owen Jan 2021

A Spatiotemporal Assessment Of Fish Assemblage Response To Land-Use Change And The Evaluation Of Edna Metabarcoding For Describing Diverse Fish Communities, Timothy M. Owen

Theses and Dissertations

Fish assemblages are often assessed as a biological proxy for environmental health. While humans value healthy environments for the ecosystem services and recreational opportunities they provide, it is increasingly evident that such resources can be paradoxically degraded by anthropogenic activities. In this investigation, we studied the relationship between different intensities of anthropogenic land-use change and habitat-driven fish assemblage response across multiple spatiotemporal scales. Secondarily, we explored the efficacy of eDNA metabarcoding against conventional electrofishing techniques for the purpose of describing complete fish communities. This study was conducted in the Tuckahoe Creek basin near Richmond, Virginia. This James River tributary serves …

Go to article

Use Of Redwood Basal Hollows By Bats: A Focus On The Townsend's Big-Eared Bat On The North Coast Of California, Amon Jotesh Armstrong Jan 2021

Use Of Redwood Basal Hollows By Bats: A Focus On The Townsend's Big-Eared Bat On The North Coast Of California, Amon Jotesh Armstrong

Cal Poly Humboldt theses and projects

Loss of roosting resources, either through disturbance or removal, negatively affects bats. For sensitive species, such as the Townsend’s big-eared bat (Corynorhinus townsendii), determining roost requirements is a critical component in conserving their habitat. Such cavity roosting bats on the North Coast of California may use hollows in large redwood trees. In this study, I examined the factors determining the use of basal tree hollows by different bat species at eight redwood forest sites in Del Norte, Humboldt, and Mendocino Counties, California. Bat guano was collected from 179 basal hollow roosts from 2017 to 2018, and guano mass …

Go to article

Effects Of Large Wood Restoration On Coho Salmon In A Northern California Watershed: A Before-After-Control-Impact Experiment, Natalie B. Okun Jan 2021

Effects Of Large Wood Restoration On Coho Salmon In A Northern California Watershed: A Before-After-Control-Impact Experiment, Natalie B. Okun

Cal Poly Humboldt theses and projects

Substantial time, money, and effort are invested in river and stream restoration projects to aid in the recovery of imperiled salmonid populations, but there is little evidence that these efforts have had lasting positive impacts on juvenile fish growth and survival. To assess the effectiveness of large woody debris (LWD) restoration, which is one of the most common restoration practices, I evaluated the growth and survival response of endangered Central California Coast coho salmon (Oncorhynchus kisutch) in a paired watershed before-after impact-control (BACI) study. To determine if LWD supplementation influenced coho salmon growth and survival, two neighboring, similar …

Go to article

Searching For Gold: Using A Novel Land Cover Classification To Identify Multiscale Drivers Of Site Occupancy By A Flagship Species For Early-Successional Habitat Conservation, Baron Lin Jan 2021

Searching For Gold: Using A Novel Land Cover Classification To Identify Multiscale Drivers Of Site Occupancy By A Flagship Species For Early-Successional Habitat Conservation, Baron Lin

Theses and Dissertations

Understanding habitat selection at multiple scales is an important step in guiding conservation programs and reversing species declines. This, however, is difficult for species that occupy early-successional habitats (ESH) due to a lack of accurate representation of shrub cover in publicly available land cover data. The Golden-winged Warbler (Vermivora chrysoptera; GWWA) is a threatened species of conservation concern and a flagship for ESH conservation. We used a novel, LIDAR-derived land cover classification that accurately identifies shrubs at a fine resolution (1m) to investigate how habitat composition and configuration influence GWWA site occupancy. We aggregated this same land cover …

Go to article

Detection Of Rhodococcus Equi By Pcr From Foals And Determination Of Antimicrobial Susceptibility, Şükrü Kirkan, Uğur Parin, Hafi̇ze Tuğba Yüksel Dolgun, Eli̇f Oya Oral Jan 2021

Detection Of Rhodococcus Equi By Pcr From Foals And Determination Of Antimicrobial Susceptibility, Şükrü Kirkan, Uğur Parin, Hafi̇ze Tuğba Yüksel Dolgun, Eli̇f Oya Oral

Turkish Journal of Veterinary & Animal Sciences

The scope of this research was determination of Rhodococcus equi isolates and antimicrobial susceptibilities in nasal swab specimen taken from animals between 0 and 6 months of age period. R. equi was identified from 10 isolates (11.1%) by automatic identification device. The verification of isolates were conducted by 16S ribosomal RNA PCR. VapA gene presence was detected in two (20%) isolates and multidrug resistance was identified against 11 antimicrobials. The antimicrobial resistance to macrolides and rifampin is arising worldwide since the excessive usage of the chemotherapeutics in various breeding farms just by evaluating monitoring outcomes. These results exhibit the presence …

Go to article

Comparison Of Different Extraction Solvents Used In Gc-Ms Analysis For Detectingvolatile Odor Compounds In Heat Cow Sweat, Özgül Ani̇taş, Serap Göncü Jan 2021

Comparison Of Different Extraction Solvents Used In Gc-Ms Analysis For Detectingvolatile Odor Compounds In Heat Cow Sweat, Özgül Ani̇taş, Serap Göncü

Turkish Journal of Veterinary & Animal Sciences

The accurate estrus detection is essential for successful reproduction. Many scientists reported the importance of pheromones for accurate detection of estrus. In addition, the choice of the appropriate device and the appropriate extraction solvent is important for obtaining quickly and more estrus-specific pheromones. In this study, sweat samples were collected in heat cows and volatile organic compounds (VOCs) in the gas chromatography mass spectrometry were evaluated using three different solvents (diethyl ether, dichloromethane, and hexane) for extraction. VOCs with different numbers and different ratios were identified in all three extraction solvents. As the solvent, 9 compounds were detected in diethyl …

Go to article

Forage Yield And Quality Of Hungarian Vetch Mixture With Oat Varieties Under Rainfedconditions, Hakan Kir Jan 2021

Forage Yield And Quality Of Hungarian Vetch Mixture With Oat Varieties Under Rainfedconditions, Hakan Kir

Turkish Journal of Veterinary & Animal Sciences

This study was conducted to determine the appropriate mixture rates of Hungarian vetch and oat varieties in Kırşehir province of Turkey for two years 2017-2019. In this study, the yield and quality characteristics of single and mixed cultivations of three oat (Avena sativa L.) varieties and Hungarian vetch (Vicia pannoica Crantz) were determined. Yield characteristics such as green forage and dry matter, crude protein and digestible dry matter yields and quality characteristics such as crude protein ratio, neutral detergent fiber, acid detergent fiber, digestible dry matter, total digestible nutrient, dry matter intake and relative feed value were examined in the …

Go to article

Investigation Of The Zinc Accumulation In The Tissue And Performance In Broilers Raisedwith High Levels Of Zinc Sulfate Feed Under Heat Stress, Thawinan Waeothong, Jai Wei Lee, Liang Chou Hsia Jan 2021

Investigation Of The Zinc Accumulation In The Tissue And Performance In Broilers Raisedwith High Levels Of Zinc Sulfate Feed Under Heat Stress, Thawinan Waeothong, Jai Wei Lee, Liang Chou Hsia

Turkish Journal of Veterinary & Animal Sciences

The objectives of this study were to evaluate the effects of feeding zinc sulfate on the growth performance, Zn accumulation in the tissue, and the tibia quality. First day old of 100 chicks were randomly assigned to 10 experimental groups in a 5 (0 mg/kg Zn, 40 mg/kg ZnO, 40 mg/kg ZnSO$_{4}$.H$_{2}$O, 500 mg/kg ZnSO$_{}$, and 1000 mg/kg ZnSO$_{4}$) × 2 (high and low temperature) factorial arrangement under randomized complete block design (RCBD). Each experimental group was replicated with 10 birds. Birds were kept in individual cage until 42 days. The results showed that broilers receiving the zinc sulfate supplementation …

Go to article

Multiplex Fluorescence Quantitative Pcr For The Detection Of Eight Bacterial Pathogens Ofporcine Respiratory Disease Complex (Prdc), Jingbo Wu, Wenjin Nan, Jiangqiang Huang, Guoliang Peng, Honghui Hu Jan 2021

Multiplex Fluorescence Quantitative Pcr For The Detection Of Eight Bacterial Pathogens Ofporcine Respiratory Disease Complex (Prdc), Jingbo Wu, Wenjin Nan, Jiangqiang Huang, Guoliang Peng, Honghui Hu

Turkish Journal of Veterinary & Animal Sciences

As rapid and reliable tools for diagnosis of porcine respiratory disease complex (PRDC) bacterial pathogens are getting more important over time, we established a new multiplex fluorescence quantitative polymerase chain reaction (mFQ-PCR) system with a similar symptom. Our results showed that the system could accurately and simultaneously detect 8 pathogens within 1.5 h. The detection limits were 2-5 standard DNA copies. The correlation coefficient of the standard curve was more than 0.998, with a well dynamic range from 101 to 109, and the intra- and intervariation coefficients (CVs) were less than 2.06%. After setting the positive threshold of Ct value, …

Go to article

First Prev Next Last