Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Zoology (336)
- Ecology and Evolutionary Biology (278)
- Physical Sciences and Mathematics (219)
- Medicine and Health Sciences (204)
- Environmental Sciences (187)
-
- Veterinary Medicine (175)
- Population Biology (157)
- Agriculture (156)
- Terrestrial and Aquatic Ecology (145)
- Aquaculture and Fisheries (138)
- Biology (126)
- Veterinary Preventive Medicine, Epidemiology, and Public Health (115)
- Natural Resources and Conservation (113)
- Natural Resources Management and Policy (111)
- Other Environmental Sciences (94)
- Veterinary Infectious Diseases (93)
- Veterinary Microbiology and Immunobiology (90)
- Other Veterinary Medicine (89)
- Poultry or Avian Science (83)
- Social and Behavioral Sciences (72)
- Biodiversity (64)
- Ornithology (64)
- Meat Science (63)
- Plant Sciences (63)
- Other Animal Sciences (62)
- Marine Biology (59)
- Dairy Science (58)
- Genetics and Genomics (55)
- Institution
-
- University of Nebraska - Lincoln (218)
- Department of Primary Industries and Regional Development, Western Australia (91)
- University of Arkansas, Fayetteville (90)
- TÜBİTAK (72)
- Utah State University (57)
-
- South Dakota State University (38)
- Marshall University (27)
- Chulalongkorn University (25)
- Portland State University (25)
- University of Texas Rio Grande Valley (21)
- Nova Southeastern University (18)
- Clemson University (12)
- Old Dominion University (12)
- Wright State University (12)
- SIT Graduate Institute/SIT Study Abroad (11)
- Arkansas Tech University (10)
- Bemidji State University (10)
- West Virginia University (10)
- Cal Poly Humboldt (9)
- City University of New York (CUNY) (9)
- University of Kentucky (9)
- WellBeing International (9)
- Louisiana State University (8)
- University of New Hampshire (8)
- Eastern Illinois University (7)
- Edith Cowan University (7)
- Extension Journal Inc (7)
- Western Kentucky University (7)
- Chapman University (6)
- St. Mary's University (6)
- Keyword
-
- Sheep (24)
- Cattle (16)
- Fisheries (16)
- Sus scrofa (16)
- Conservation (15)
-
- Nutrition (15)
- Western Australia (15)
- Climate change (13)
- Feral swine (11)
- Invasive species (11)
- Pests (11)
- Aquatic ecology (10)
- Behavior (10)
- Ecology (10)
- Freshwater biology (10)
- Limnology (10)
- Livestock (10)
- MN (10)
- Minnesota (10)
- Utah State University Extension (10)
- Aquaculture (9)
- Beef cattle (9)
- Biosecurity (9)
- Experiments (9)
- Reproduction (9)
- Wildlife (9)
- Biodiversity (8)
- Biology (8)
- Equine (8)
- Management (8)
- Publication
-
- United States Department of Agriculture Wildlife Services: Staff Publications (90)
- Turkish Journal of Zoology (46)
- Poultry Science Faculty Publications and Presentations (37)
- Animal production and livestock factsheets (30)
- Turkish Journal of Veterinary & Animal Sciences (26)
-
- Nebraska Beef Cattle Reports (25)
- Department of Animal Science: Faculty Publications (22)
- Electronic Theses and Dissertations (22)
- Euscorpius (22)
- Institute for Natural Resources Publications (21)
- The Thai Journal of Veterinary Medicine (20)
- Nebraska Bird Review (19)
- Animal Science Faculty Publications and Presentations (15)
- Biosecurity factsheets (15)
- Graduate Theses and Dissertations (15)
- Fisheries Research Reports (13)
- All Current Publications (12)
- All Scans: Kerstetter Fisheries and Avian Ecology 3D Scan Series (12)
- Dissertations and Doctoral Documents, University of Nebraska-Lincoln, 2023– (12)
- Journal of Bioresource Management (12)
- Theses and Dissertations (12)
- Department of Animal Science: Dissertations, Theses, and Student Research (10)
- Graduate Theses, Dissertations, and Problem Reports (ETD) (10)
- Journal of Earth and Life Science (10)
- Masters Theses (10)
- All Theses (9)
- Cal Poly Humboldt theses and projects (9)
- Fisheries Research Articles (9)
- Human–Wildlife Interactions (9)
- Independent Study Project (ISP) Collection (9)
- Publication Type
- File Type
Articles 991 - 1019 of 1019
Full-Text Articles in Animal Sciences
Rabies, Amy T. Gilbert, Christine Ellis
Rabies, Amy T. Gilbert, Christine Ellis
United States Department of Agriculture Wildlife Services: Staff Publications
Illustrated fact sheet on rabies.
State Barrier Fence - Esperance Extension Project Overview 2024, Department Of Primary Industries And Regional Development, Western Australia
State Barrier Fence - Esperance Extension Project Overview 2024, Department Of Primary Industries And Regional Development, Western Australia
Biosecurity published reports
Western Australia’s State Barrier Fence plays an important role in protecting landholders inside the fence by preventing the movement of animal pests, including wild dogs and emus, from pastoral areas into the agricultural regions. It is a state asset which is managed by the Department of Primary Industries and Regional Development.
The original fences (numbers 1, 2 and 3) were constructed between 1902 and 1907. Originally known as the Rabbit Proof Fences, it has also been known as the State Vermin Fence, the Emu Fence and now the State Barrier Fence. Since 2010, the fence has been upgraded to wild …
Can Edna Be Used To Locate Shawnee Hills Cavefish Forbesichthys Papilliferus?, Megan Brandt, Timothy Spier Phd, Gary Zeruth Phd
Can Edna Be Used To Locate Shawnee Hills Cavefish Forbesichthys Papilliferus?, Megan Brandt, Timothy Spier Phd, Gary Zeruth Phd
Murray State Theses and Dissertations
Traditional stream fish sampling methods, such as seining and electrofishing, are time consuming, expensive, and limited to short stretches of stream. However, the analysis of environmental DNA (eDNA) from water samples promises to be a quick, inexpensive method for detecting fish. The streams of the Land Between the Lakes Recreational Area (LBL) are unique, undisturbed streams which contain many interesting fish species for which little information exists. One such rare species is the Shawnee Hills Cavefish Forbesichthys papilliferus, which is known to exist in a few LBL streams. However, the complete distribution of the Shawnee Hills Cavefish in LBL …
The Effects Of Early Exposure To Prescription/Illicit Drugs And Drug Metabolites On Larval Zebrafish Behavioral And Motor Function Development, Jacob Thomas, Dena Weinberger, Bikram Subedi, Brandon Capps
The Effects Of Early Exposure To Prescription/Illicit Drugs And Drug Metabolites On Larval Zebrafish Behavioral And Motor Function Development, Jacob Thomas, Dena Weinberger, Bikram Subedi, Brandon Capps
Murray State Theses and Dissertations
THE EFFECTS OF EARLY EXPOSURE TO PRESCRIPTION/ILLICIT DRUGS AND DRUG METABOLITES ON LARVAL ZEBRAFISH BEHAVIORAL AND MOTOR FUNCTION DEVELOPMENT
A Thesis Presented to the Faculty of the Department of Biology
Murray State University
Murray, Kentucky
In Partial Fulfillment of the Requirements for the Degree of Masters In Science
By Jacob Thomas, B.S., Murray State University
December 2024
Acknowledgements
Brandon Capps, who pretty much did a whole third of the legwork on this project and saved me lots of headaches;
Chandler Maddox, one of the University of Kentucky’s finest undergrads who came in from the top rope with a folding chair …
Transgenerational Effects Of Stress On The Plasma Proteome Of A Marine Mammal, Emily Voelkner
Transgenerational Effects Of Stress On The Plasma Proteome Of A Marine Mammal, Emily Voelkner
University of the Pacific Theses and Dissertations
The physiological stress response enables animals to respond to changes in their environment, and is mediated by the hypothalamic-pituitary-adrenal (HPA) axis in mammals. Increased activation of the HPA axis by repeated stress during critical life stages like reproduction could affect fitness. Information about a stressor can be communicated to offspring via hormone signals prenatally, or postnatally via milk, and affect offspring development and stress reactivity. Experimentally activating the HPA axis by adrenocorticotropic hormone (ACTH) administration results in the synthesis of the major glucocorticoid hormone cortisol, which has well-studied far-reaching effects on growth, metabolism, and immunity. Beyond cortisol levels alone, biomarkers …
Hepatic Mrna Expression Of Innate And Adaptive Immune Genes In Beef Steers With Divergent Residual Body Weight Gain, Deborah Ologunagba
Hepatic Mrna Expression Of Innate And Adaptive Immune Genes In Beef Steers With Divergent Residual Body Weight Gain, Deborah Ologunagba
Graduate Theses, Dissertations, and Problem Reports (ETD)
Immune system function is critical to maintaining the health and increasing productivity of cattle, affecting both their growth and their disease resistance. In an efficient immune system, the liver assumes an integral function in detoxification and metabolic processes and contributes substantially to overall production and immunity. In this study, we evaluated the hepatic mRNA expression of genes involved in innate and adaptive immunity in crossbred beef steers with either a positive or negative residual body weight gain (RADG). Positive-RADG beef steers (n = 8; RADG = 0.76 kg/d) and negative-RADG beef steers (n = 8; RADG = -0.64 kg/d) were …
Succineidae (Gastropoda: Pulmonata) In Bhutan, Edmund Gittenberger, Choki Gyeltshen, Tshering Pem, Adriaan Gittenberger, Sherub Sherub
Succineidae (Gastropoda: Pulmonata) In Bhutan, Edmund Gittenberger, Choki Gyeltshen, Tshering Pem, Adriaan Gittenberger, Sherub Sherub
Research outputs 2022 to 2026
Two species of Succineidae, belonging to different subfami lies, are reported from Bhutan. Succinea rutilans, described from the Khasi hills, is one more indication of a biogeo graphical link between Bhutan and the Indian state of Meghalaya. Based primarily on DNA data, Indosuccinea crassinuclea is considered a widespread species, distributed from northern India and Bhutan southwards to even Sri Lanka and The Maldives.
Evaluation Of A Novel Corn Fermented Protein Ingredient, Probiotics, And Postbiotics On Nursery Pig Growth Performance And Gut Health, Juan F. Castillo Zuniga
Evaluation Of A Novel Corn Fermented Protein Ingredient, Probiotics, And Postbiotics On Nursery Pig Growth Performance And Gut Health, Juan F. Castillo Zuniga
Electronic Theses and Dissertations
Weaning is a necessary step in pig production. After weaning, pigs are subjected to various nutritional, psychological, and environmental stresses. The weaning period is an important period for the intestinal development of the pig. During this time, digestion, immunity, metabolism, and various other aspects of the pig change rapidly. Therefore, providing high-quality feed ingredients is crucial to encourage the newly weaned pig to start consuming solid feed. Two independent studies were conducted to determine if the inclusion of: 1) corn fermented protein (CFP) or 2) probiotics or postbiotics impact nursery pigs' growth performance and gut health. The first experiment utilized …
Identification And Characterization Of Three Novel Rumen Bacterial Species In Sheep Fed A Concentrate Diet, Reid Frederick Anema
Identification And Characterization Of Three Novel Rumen Bacterial Species In Sheep Fed A Concentrate Diet, Reid Frederick Anema
Electronic Theses and Dissertations
Sheep production in the United States is a popular venture for both small farmers and large enterprise owners, as there is a market for end products such as wool and meat. One major factor of raising sheep is nutrition as an adequate diet will allow an animal to reach its full genetic potential for growth. With that in mind, the composition of the diet must be formulated to benefit the animal. Ruminants have the ability to use a variety of plants that are often inedible for humans to create products that humans can consume. These varying feedstuffs, whether they include …
An Effective Method For Long-Term Control Of American Bullfrogs Syntopic With Special-Status Native Amphibians In California, Usa, Jeff A. Alvarez, Jeffery T. Wilcox
An Effective Method For Long-Term Control Of American Bullfrogs Syntopic With Special-Status Native Amphibians In California, Usa, Jeff A. Alvarez, Jeffery T. Wilcox
Human–Wildlife Interactions
American bullfrogs (Lithobates catesbeianus) are invasive in western North America and are well established in California, USA, where they are widespread. This invasive species has been implicated in the decrease of native amphibian populations and is believed to have contributed to the decline of threatened and endangered amphibians regionally. We utilized air rifles, tin alloy pellets, and 2 shooters to systematically control L. catesbeianus in both lentic and lotic habitat types within 2 counties in California. We visited sites monthly (April through November) for approximately 8 and 14 years to lethally target and remove L. catesbeianus …
Quantifying Wild Pig Disturbance In Pastures And Wetlands Using Unmanned Aerial Vehicle-Derived Imagery, Wesley M. Anderson, Bethany Wight, Raoul K. Boughton
Quantifying Wild Pig Disturbance In Pastures And Wetlands Using Unmanned Aerial Vehicle-Derived Imagery, Wesley M. Anderson, Bethany Wight, Raoul K. Boughton
Human–Wildlife Interactions
The use of unmanned aerial vehicles (UAVs) for agricultural and environmental research has increased markedly in recent years, and a key application has been to conduct damage assessments. Invasive wild pigs (Sus scrofa) cause both agricultural and environmental damage, and past studies have utilized UAVs to quantify this damage. Each methodology has advantages, but they also have drawbacks such as high rates of damage omission or reliance upon a near-infrared camera, which may be prohibitively expensive for some land managers and scientists. Our objective was to develop a methodology that could be easily implemented to conduct wild pig …
Is Mitigation Translocation An Effective Method For Reducing Laysan Albatross–Military Aircraft Collisions?, Brian E. Washburn, Katherine D. Rubiano, William P. Bukoski
Is Mitigation Translocation An Effective Method For Reducing Laysan Albatross–Military Aircraft Collisions?, Brian E. Washburn, Katherine D. Rubiano, William P. Bukoski
Human–Wildlife Interactions
Wildlife–aircraft collisions (wildlife strikes) pose a serious risk to civil and military aircraft. Each year, Laysan albatrosses (Phoebastria immutabilis) attempt to establish a breeding colony on the airfield at the U.S. Navy’s Pacific Missile Range Facility (PMRF) located on the island of Kaua‘i, Hawai‘i, USA, resulting in a hazard to safe military aircraft operations at this facility. A long-term management program, with an emphasis on mitigation translocation (e.g., live-capture and translocation away from the area) of problematic individuals, has been conducted by the U.S. Department of Agriculture, Wildlife Services. However, the efficacy of mitigation translocation as a nonlethal …
Longevity In Afrikaner Cattle: A Survival Analysis, Allison M. Bot Steffl
Longevity In Afrikaner Cattle: A Survival Analysis, Allison M. Bot Steffl
Electronic Theses and Dissertations
The Afrikaner breed of cattle is indigenous to South Africa and due to their hardiness was once the most popular breed amongst farmers. The objectives for this study were to: (1) estimate environmental effects (age at first calving, season) and (2) genetic variance affecting longevity in Afrikaner cattle using survival analysis and a Weibull model and (3) evaluate the effect of the Infusion Project on longevity utilizing a Cox model. For the first objective, age at first calving impacted longevity as younger age at first calving was associated with decreased longevity. Season of birth and year of birth also impacted …
Methods For Optimizing Detection And Evaluating Habitat Use Of North American River Otters In South Dakota, Jessica Speiser
Methods For Optimizing Detection And Evaluating Habitat Use Of North American River Otters In South Dakota, Jessica Speiser
Electronic Theses and Dissertations
North American river otters (Lontra canadensis) play a critical role as an apex predator in riverine ecosystems. A challenging species to survey using traditional methods, they remain understudied in non-forested regions, such as the Northern Great Plains, where habitat degradation and landscape fragmentation may reduce habitat quality and availability and disrupt landscape connectivity. This thesis aims to improve detectability and investigates the habitat use of river otters in South Dakota to better understand habitat needs of otters and improve their continued recovery and management. My first chapter provides a brief overview of river otters and their ecological roles in freshwater …
Respiratory Disease In Bighorn Sheep: A Varied Investigation Of Immunization, Transmission, And Detection, Katelin Frerichs
Respiratory Disease In Bighorn Sheep: A Varied Investigation Of Immunization, Transmission, And Detection, Katelin Frerichs
Electronic Theses and Dissertations
Respiratory disease has historically been recognized as a limiting factor to wild bighorn sheep (Ovis canadensis) herds throughout North America with epizootics resulting in large-scale die offs and reductions in recruitment. The primary etiologic agent associated with pneumonia outbreaks in bighorn sheep is Mycoplasma ovipneumoniae. This bacterial pathogen is frequently carried asymptomatically by domestic sheep (Ovis aries) and goats (Capra hircus); however, when these domestic hosts come in contact with and spread this pathogen to bighorns, the disease can cause epizootics and large-scale mortality. Domestic sheep strains are more commonly detected in bighorn sheep than domestic goat strains, and previous …
Identification Of Dermatophytes And Comparative Efficacy Of Topical Antifungals Fortreating Canine Dermatophytosis, Arun Prakash Vadakkoot, Rathish Ramachandran Latha, Neeraja Eramthottil, Lijo John, Bipin Kuriyedath Chitharalil, Deepa Padinjare Meleppat
Identification Of Dermatophytes And Comparative Efficacy Of Topical Antifungals Fortreating Canine Dermatophytosis, Arun Prakash Vadakkoot, Rathish Ramachandran Latha, Neeraja Eramthottil, Lijo John, Bipin Kuriyedath Chitharalil, Deepa Padinjare Meleppat
Turkish Journal of Veterinary & Animal Sciences
Dermatophytosis is a potentially zoonotic superficial skin infection caused by keratinophilic fungi. Identification ofdermatophytes aids in understanding the epidemiology of infections and finding out better treatment modalities. The study aimed toidentify dermatophytes in dogs and compare the effectiveness of three different topical drugs for treating dermatophytosis. Molecularidentification of dermatophyte isolates obtained on culturing was done by restriction fragment length polymorphism of the ampliconobtained by polymerase chain reaction of the Internal Transcribed Spacer (ITS) region of the recombinant DNA. Thirty of the positivecases were divided into three groups, Group I was treated with shampoo containing 2% each of miconazole chlorhexidine, Group …
Determining The Effects Of Different Bypass Fat Supplementation On Performance, Milkyield, And Milk Composition Of Anatolian Buffaloes, Sezer Öz, Seher Küçükersan
Determining The Effects Of Different Bypass Fat Supplementation On Performance, Milkyield, And Milk Composition Of Anatolian Buffaloes, Sezer Öz, Seher Küçükersan
Turkish Journal of Veterinary & Animal Sciences
This study aimed to explore the effects of animal bypass fat (ABF) and palm bypass fat (PBF) added to the rations of Anatolianbuffaloes on dry matter consumption, feed conversion ratio, milk yield, some milk components, and parameters. A total of 21 heads ofbuffalo in the early lactation period; milk yield averages, lactation periods, lactation numbers, live weights, and ages were selected anddivided into three experimental groups, each consisting of 7 buffaloes. The experiment was conducted according to the crossover trialpattern. There was no statistically significant difference between the groups in terms of dry matter consumption and feed conversionratio (p > 0.05). …
Comparison Of Nonlinear Models For Predicting Live Weight Growth Curves In Lambproduction Of Kıvırcık And Karacabey Merino, Vasfi̇ye Kader Esen, Orhan Karadağ, Cengi̇z Elmaci, Seli̇m Esen
Comparison Of Nonlinear Models For Predicting Live Weight Growth Curves In Lambproduction Of Kıvırcık And Karacabey Merino, Vasfi̇ye Kader Esen, Orhan Karadağ, Cengi̇z Elmaci, Seli̇m Esen
Turkish Journal of Veterinary & Animal Sciences
To achieve sustainable lamb production, it is crucial to determine the optimal slaughter age for maximum economic efficiencyand have a comprehensive understanding of breed characteristics. This study focuses on evaluating different nonlinear models todetermine the optimal slaughter age for Karacabey Merino and Kıvırcık lambs, renowned for their early development and superiormeat quality, respectively. The dataset comprised age-related live weight data from 98 lambs, including 36 female and 15 male Kıvırcıklambs, as well as 33 female and 14 male Karacabey Merino lambs. Six models, namely, negative exponential, Brody, Gompertz, logistic,Bertalanffy, and Richards were utilized to analyze the data. The model parameters …
Determination Of Yield Nutrient Contents And In Vitro Digestibility Of Some Triticale Varieties Harvested At Different Maturity Stages, Şevket Evci̇, Kami̇l Kara, Mehmet Demi̇rci̇
Determination Of Yield Nutrient Contents And In Vitro Digestibility Of Some Triticale Varieties Harvested At Different Maturity Stages, Şevket Evci̇, Kami̇l Kara, Mehmet Demi̇rci̇
Turkish Journal of Veterinary & Animal Sciences
The aim of this study was to determine the contribution of growth performance, nutrient content and digestibility of different triticale varieties to ruminant diets and to indirectly assist farmers in feed production. The experiment utilized 5 triticale varieties. The study was designed as a randomized complete block design with split plots and 3 replications. The digestibility values were determined in vitro after 48 hours of incubation using the Daisy Ankom® digester. Rumen liquid was obtained from dairy cows slaughtered at the 'Yeşil Vadi Et Entegre' facility. Nutrient values, in vitro dry matter digestibility, and yield traits of forages were determined. …
The Blackfeet Nation’S Bison Conservation Herd Management Plan, Brandon Kittson
The Blackfeet Nation’S Bison Conservation Herd Management Plan, Brandon Kittson
Graduate Student Theses, Dissertations, & Professional Papers
This document is meant to act as a guide to understanding Bison reintroduction on the Blackfeet reservation and serve as a resource for bison management. This report and plan will: 1) review bison ecology and the history of reintroduction efforts on the reservation; 2) identify potential issues and barriers to successful reintroduction; 3) present a summary of current land policies and patterns of land use on the reservation; and 4) provide recommendations for dealing with those potential issues. Recommendations will be based on analyses of previous knowledge of bison and bison behavior.
Comparing Alternative Developmental Modes: Structure And Gene Expression In The Olfactory System Of Plethodontid Salamanders, Giuseppina S. Lanzilli
Comparing Alternative Developmental Modes: Structure And Gene Expression In The Olfactory System Of Plethodontid Salamanders, Giuseppina S. Lanzilli
Cal Poly Humboldt theses and projects
The olfactory system of extant amphibians changes as the animal transitions from a fully aquatic to a terrestrial lifestyle at metamorphosis. Cellular morphology of the nose and expression patterns of olfactory genes in the nasal cavity have been examined for a variety of frogs and salamanders, but among plethodontid salamanders, molecular data are available only for Plethodon shermani. Using standard histology and micro-CT reconstruction, I investigated the structure of the olfactory organs of larvae, juveniles, and adults of six plethodontid species, with terrestrial, streamside, semiaquatic, and aquatic adults. The overall structure of the olfactory cavity was generally similar across …
Evaluating The Utility Of Tracers To Characterize Environmental Dna Transport And Inform Detection Of Fishes In Small Streams, Gavin B. Bandy
Evaluating The Utility Of Tracers To Characterize Environmental Dna Transport And Inform Detection Of Fishes In Small Streams, Gavin B. Bandy
Cal Poly Humboldt theses and projects
This study was motivated by the need to develop a noninvasive and highly sensitive monitoring tool for determining local occupancy of an endangered aquatic species To make inference into the occupancy of fishes within small stream sites, we developed a method to determine whether environmental DNA (eDNA) concentrations from a target species were elevated relative to a tracer, formulated to mimic eDNA and introduced at a single location. We examined patterns in the observed distribution of the tracer to account for the effects of site-specific transport processes and sampling on distributions of naturally occurring eDNA at small spatial scales (400 …
Pond Characteristics That Influence Oviposition Site Selection By Two Pond-Breeding Amphibians, Northern Red-Legged Frog (Rana Aurora) And Northwestern Salamander (Ambystoma Gracile), Jessica Jones
Cal Poly Humboldt theses and projects
Pond-breeding amphibians connect aquatic and terrestrial habitats through their biphasic life cycle, and understanding pond characteristics that support oviposition sites for multiple species is important for amphibian conservation. Two common amphibians in the Pacific Northwest, Northern red-legged frog (Rana aurora) and Northwestern salamander (Ambystoma gracile) often oviposit in the same pond; however, prior studies have focused on pond use by one species or the other, but not both together. I surveyed pond and oviposition site characteristics of 26 ponds in Humboldt County, CA, 10 of which were used only by R. aurora and 16 of which …
Characterizing The Habitat Use Of Pacific Coast Feeding Group Gray Whales (Eschrichtius Robustus) And The Spatial And Temporal Variability Of Their Benthic And Planktonic Invertebrate Prey In Northern California, Robyn E. Norman
Cal Poly Humboldt theses and projects
As opportunistic foragers, the Eastern North Pacific population (~20,000) of gray whales (Eschrichtius robustus) feed on diverse benthic and planktonic invertebrates in northern Alaska foraging grounds before they undertake one of the largest yearly migrations of any mammal to breed in Baja California, Mexico. While most of the population travels to the summer foraging grounds in Alaska, a sub-group of whales (~230) called the Pacific Coast Feeding Group (PCFG) summer between British Columbia, Canada, and northern California. The diet of PCFG whales typically includes high-density and/or high-caloric prey items like mysids and diverse species of amphipods, yet a …
Effects Of Habitat Selection And Individual Quality On The Reproductive Success Of Barn Owls (Tyto Furcata), Jaime E. Carlino
Effects Of Habitat Selection And Individual Quality On The Reproductive Success Of Barn Owls (Tyto Furcata), Jaime E. Carlino
Cal Poly Humboldt theses and projects
The hypothesis of adaptive breeding habitat selection proposes congruence between the evolved selection of habitats and fitness components such as reproductive success. However, mismatches between habitat selection and observed fitness outcomes are not unusual and can arise for multiple reasons. Variation in individual qualities of animals has also been found to affect reproduction and survival. I examined associations between barn owl nest box selection, reproductive output, and plumage characteristics previously shown to correspond to individual quality. I found that barn owls selected tall nest boxes made of wood, mounted high off the ground, and with increased proportions of grassland around …
Temperature Driven Variability In Bull Kelp (Nereocystis Luetkeana) Early Life Stages: A Comparative Study Of California Populations, Marzia Fattori
Temperature Driven Variability In Bull Kelp (Nereocystis Luetkeana) Early Life Stages: A Comparative Study Of California Populations, Marzia Fattori
Cal Poly Humboldt theses and projects
This study investigated the effects of elevated temperatures on the reproductive and developmental stages of Nereocystis luetkeana, a crucial brown macroalgae found along the western coast of North America. My objectives were to 1) evaluate the impact of increasing temperature on the abundance of gametophytes from various sites, 2) determine the length of gametophytes that were affected by temperature on day 10 of culture, 3) assess the presence or absence of oocytes, sporophytes (young vs. multicellular), and abnormal cells, to understand the reproductive and stress responses to higher temperatures, and 4) determine if there is variation among early developmental …
A Computerized Mastitis Classification Aid Using A Dairy Herd-Based Records: Multi-Layer Perceptron (Mlp) Neural Network With Backpropagation Approach, Ahmed M. Gad Prof, Dina Faris De, Sherif Ramadan Prof, Ghada Afifi Dr, Eman Manaa Prof, Mahmoud El-Tarabany Prof
A Computerized Mastitis Classification Aid Using A Dairy Herd-Based Records: Multi-Layer Perceptron (Mlp) Neural Network With Backpropagation Approach, Ahmed M. Gad Prof, Dina Faris De, Sherif Ramadan Prof, Ghada Afifi Dr, Eman Manaa Prof, Mahmoud El-Tarabany Prof
Business Administration
The main objective of this study is to develop an efficient machine learning-based model for the early prediction of clinical mastitis in Holstein Friesian dairy cattle where automatic milking system (AMS) data is used. The model aims to offer a costless opportunity for mastitis control and reduce its negative impact on livestock production. Different forward multilayer perceptron (MLP) neural networks with backpropagation (BP) learning algorithms using various numbers of hidden neurons and epochs have been introduced. The results of the established models are evaluated based on different metrics such as the accuracy, the F1 core, the precision, the recall, and …
Suitability Of Reintroduction As A Tool For The Conservation Of The Central American River Turtle (Dermatemys Mawii), Wesley O. Smith
Suitability Of Reintroduction As A Tool For The Conservation Of The Central American River Turtle (Dermatemys Mawii), Wesley O. Smith
Graduate Theses/Dissertations
The Central American River Turtle (Dermatemys mawii) has declined throughout its historical range to the point that it is critically endangered; the primary driver is overharvesting by humans for consumption. To help conserve this critically endangered turtle, a head-start program was established in Belize and introductions of head-started individuals have been considered to bolster populations. I released and studied hatchling and head-started juvenile Central American River Turtles during the summers of 2021 and 2022, respectively. The goal was to determine the suitability of hatchlings and juveniles for use in conservation reintroductions, along with elucidating aspects of the ecology …
Comparing In Vivo Dry Matter Digestibility Vs In Vitro Dry Matter Digestibility, Katherine Kemper Sanders
Comparing In Vivo Dry Matter Digestibility Vs In Vitro Dry Matter Digestibility, Katherine Kemper Sanders
Graduate Theses/Dissertations
Three yearling steers were used in a 2 X 3 incomplete Latin square design to determine In Vivo Dry Matter Digestibility of two forages, alfalfa (ALF) and mixed grass hay (GH) to determine the accuracy of In Vitro Dry Matter Digestibility (IVDMD) methods for determining the true dry matter digestibility (DMD). Forage samples were collected and digested In Vitro using the ANKOM DaisyII Incubator. Forage Fiber Analysis of the residue was used to determine true dry matter digestibility. There was significant interaction between treatment and period (P < 0.05) for both In Vitro and In Vivo methods. When comparing the two methods there …