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Articles 1 - 30 of 48
Full-Text Articles in Animal Sciences
The Potential For Dickeya Dianthicola To Be Vectored By Two Common Insect Pests Of Potatoes, Jonas K. Insinga
The Potential For Dickeya Dianthicola To Be Vectored By Two Common Insect Pests Of Potatoes, Jonas K. Insinga
Electronic Theses and Dissertations
Dickeya dianthicola (Samson) causing blackleg and soft rot was first detected in potatoes grown in Maine in 2014. Previous work has suggested that insects, particularly aphids, may be able to vector bacteria in this genus between plants, but no conclusive work has been done to confirm this theory. In order to determine whether insect-mediated transmission is likely to occur in potato fields, two model potato pests common in Maine were used: the Colorado potato beetle (Leptinotarsa decimlineata Say) and the green peach aphids (Myzus persicae Sulzer). Olfactometry and recruitment experiments evaluated if either insect discriminates between infected and …
Eastern Collared Lizard (Crotaphytus Collaris) Population Declines In Ozark Landscapes: An Assessment Of Environmental Constraints., Casey L. Brewster
Eastern Collared Lizard (Crotaphytus Collaris) Population Declines In Ozark Landscapes: An Assessment Of Environmental Constraints., Casey L. Brewster
Graduate Theses and Dissertations
The Eastern Collared Lizard (Crotaphytus collaris) has experienced extensive population declines over the past half century in the Ozark Mountains. Previous research suggests that glade habitat degradation through woody vegetation encroachment is an important factor resulting in population declines. In this dissertation I used information on time-energy budgets to investigate the link between habitat degradation and shifts in life history traits likely resulting in population declines of Eastern Collared Lizards (Crotaphytus collaris) in the Ozarks. In chapter one, I addressed the influence of dense woody vegetation encroachment on age-specific growth, body size, body condition and reproduction of C. collaris in …
Mammal Species Inventory Using Various Trapping Methods In Zone 4 Of Billy Barquedier National Park, Belize During Rainy Season, Mersady Redding
Mammal Species Inventory Using Various Trapping Methods In Zone 4 Of Billy Barquedier National Park, Belize During Rainy Season, Mersady Redding
Animal Science Undergraduate Honors Theses
Belize is a small country, but it is extremely ecologically diverse. Based on the few studies conducted in Belize, the abundance of mammals is low but diversity is high. Particular findings note the number and identity of species differed between four sites in the Maya Mountains of Belize, indicating that a data set from a single site is not representative of the Neotropical region. Insufficient data is available to estimate current species richness of many areas in Belize, including Billy Barquedier National Park (BBNP). The objective of this study was to explore trapping and documentation methods of terrestrial mammals in …
Immune Gene Diversity And Populations Structure Of Reticulated Flatwoods Salamander (Ambystoma Bishopi), Steven Tyler Williams
Immune Gene Diversity And Populations Structure Of Reticulated Flatwoods Salamander (Ambystoma Bishopi), Steven Tyler Williams
LSU Master's Theses
Reticulated flatwoods salamander (Ambystoma bishopi) populations began decreasing dramatically in the late 1900s. Contemporary populations are small, isolated, and may be susceptible to inbreeding and reduced adaptive potential because of low genetic variation. Genetic variation at immune genes is especially important as it influences disease susceptibility and adaptation to emerging infectious pathogens, a central conservation concern for declining amphibians. Connectivity between isolated populations is also vital to maintain genetic diversity and avoid inbreeding. I collected tissue samples from across the extant range of this salamander to examine genetic variation and population structure in: immune genes broadly (immunome), the …
Spatial And Temporal Variation In The Diet Composition Of Zooplankton In Mission Bay, Bryanna Paulson
Spatial And Temporal Variation In The Diet Composition Of Zooplankton In Mission Bay, Bryanna Paulson
Theses
Analyses of quantitative data on zooplankton diets are vital for understanding the drivers of zooplankton abundance within an ecosystem. Such analyses also provide insight into trophic pathways within the lower planktonic food web, which support populations of higher trophic level species. This study used carbon and nitrogen stable isotope ratios of size-fractionated plankton in Mission Bay, San Diego, CA to examine the spatial and temporal variation in zooplankton trophic ecology and determine potential environmental drivers of zooplankton community structure. Carbon stable isotopes reflect primary production sources in an organism’s diet, and nitrogen stable isotope ratios can be used to estimate …
Effects Of Protective Nesting Site Properties On Gyrfalcon Breeding Success And Parental Investment In Western Alaska, Michael Thomas Henderson
Effects Of Protective Nesting Site Properties On Gyrfalcon Breeding Success And Parental Investment In Western Alaska, Michael Thomas Henderson
Boise State University Theses and Dissertations
Habitat suitability for wildlife is defined at scales ranging from the landscape to an individual breeding site. Areas that fulfill habitat requirements for birds disproportionally maintain populations, and the identification of variables that distinguish optimal breeding sites helps to prioritize conservation. Nesting site characteristics that protect breeding raptors from harsh weather can promote a more favorable microclimate and increase breeding success, although previous attempts to understand this effect in breeding Gyrfalcons have yielded ambiguous results. Additionally, breeding adults incur substantial costs from the physical shielding of eggs and nestlings, particularly in the Arctic, and it is possible that protective properties …
Old Enemies With New Problems?: Investigating The Ecological Relationship Between Ridgway’S Hawk And The Parasitic Nest Fly Philornis Pici, Christine Deegear Hayes
Old Enemies With New Problems?: Investigating The Ecological Relationship Between Ridgway’S Hawk And The Parasitic Nest Fly Philornis Pici, Christine Deegear Hayes
Boise State University Theses and Dissertations
Modern conservation efforts tend not to focus on individual species, but rather on the entire ecosystem of a species in peril. Many ecological factors can affect a species’ ability to maintain healthy populations. Parasites, which derive nutrients at the expense of their hosts, can reduce host fitness and limit population growth, acting as biological controls in healthy ecosystems. The negative impacts of parasites on their hosts can be exacerbated by climate change and anthropogenic land-use practices in ways that may limit recovery or drive host species to extinction. Introduced parasitic nest flies in the genus Philornis (Diptera: Muscidae) are threatening …
Assessing The Stability And Distribution Of A Newly Discovered Endangered Bumble Bee Population In Northeastern Illinois, Barbara Locascio
Assessing The Stability And Distribution Of A Newly Discovered Endangered Bumble Bee Population In Northeastern Illinois, Barbara Locascio
Pence-Boyce STEM Student Scholarship
Many species of bumble bees (Bombus spp.) have been declining in abundance across North America. In the Midwest declines, including that of B. affinis, recently listed as a federally endangered species, are attributed to several factors including habitat loss. Native tallgrass prairies could be ideal areas for Bombus spp. communities to sustain populations, due to native floral resources. However, few studies have been done to determine this. Our objective was to determine the stability and consistency of B. affinis populations at Midewin National Tallgrass Prairie and to investigate whether Goose Lake Prairie, a nearby prairie remnant, …
Play Behavior And The Development Of Boldness And Caution In Juvenile Belding’S Ground Squirrels (Urocitellus Beldingi), Madelene Shehan
Play Behavior And The Development Of Boldness And Caution In Juvenile Belding’S Ground Squirrels (Urocitellus Beldingi), Madelene Shehan
Master's Theses
The ubiquity of play among juvenile mammals suggests it provides adaptive benefits, potentially through influences on the development of temperament in young animals. Juvenile Belding’s ground squirrels (Urocitellus beldingi) must balance competing demands for boldness and caution imposed by the fundamental trade-off between their short active season and their vulnerability to predation. In this study, I evaluated whether play helps to facilitate the development of an appropriate balance between boldness and caution in juvenile U. beldingi.I observed the play behavior of juvenile U. beldingiand conducted flight-initiation distance tests to measure boldness-caution at the beginning and toward …
Stress And Body Composition Of Juvenile Alligator Snapping Turtles (Macrochelys Temminckii), Brandon Scott Tappmeyer
Stress And Body Composition Of Juvenile Alligator Snapping Turtles (Macrochelys Temminckii), Brandon Scott Tappmeyer
MSU Graduate Theses
The alligator snapping turtle (Macrochelys temminckii), is a species of conservation concern that is the subject of multiple head-start and reintroduction efforts across its range. In captive propagation programs, producing offspring that are in optimal physiological condition maximizes the likelihood of success after release. The purpose of my study was to compare stress and body composition between one free-ranging reintroduced population and two captive populations. The two captive populations were both housed in southern Oklahoma, but one group was reared indoors whereas the other inhabited outdoor ponds at a national fish hatchery. I used circulating glucocorticoid (corticosterone) concentrations as an …
Stabilizing Forces In Acoustic Cultural Evolution: Comparing Humans And Birds, Daniel C. Mann
Stabilizing Forces In Acoustic Cultural Evolution: Comparing Humans And Birds, Daniel C. Mann
Dissertations, Theses, and Capstone Projects
Learned acoustic communication systems, like birdsong and spoken human language, can be described from two seemingly contradictory perspectives. On one hand, learned acoustic communication systems can be remarkably consistent. Substantive and descriptive generalizations can be made which hold for a majority of populations within a species. On the other hand, learned acoustic communication systems are often highly variable. The degree of variation is often so great that few, if any, substantive generalizations hold for all populations in a species.
Within my dissertation, I explore the interplay of variation and uniformity in three vocal learning species: budgerigars (Melopsittacus undulatus), …
The Development Of Socio-Sexual Behavior In Beluga Whales (Delphinapterus Leucas), Malin K. Lilley
The Development Of Socio-Sexual Behavior In Beluga Whales (Delphinapterus Leucas), Malin K. Lilley
Dissertations
The reproductive success of the beluga whale is critical for a species facing extinction in its endangered Cook Inlet, Alaska population. To date, little is known about the mating behavior of these whales in wild populations. On the other hand, observations of beluga whales in human care allow researchers to better understand many aspects of their daily lives and life histories that are difficult to assess in wild populations. Thus far, a catalog of socio-sexual behavior has been established based on observations of belugas; however, the developmental trajectory of socio-sexual behavior is not well-understood. The present study explored how socio-sexual …
Bottlenose Dolphin (Tursiops Truncatus) Vocal Responses To Sonar And Spectrally Pink Background Noise, Maria Zapetis
Bottlenose Dolphin (Tursiops Truncatus) Vocal Responses To Sonar And Spectrally Pink Background Noise, Maria Zapetis
Dissertations
As human populations rise, the level of man-made noise increases globally. Naval sonar and boat traffic are underwater sound sources of particular concern to marine mammal welfare. To better understand the impact of these noise increases on cetaceans, studies can explore animals’ behavioral changes in response to noise. Studies have investigated the ‘dose-response’ relationship between the received sound pressure level of sonar signals and the behavior of cetaceans in the wild, but exposure studies in controlled environments are limited. The studies in this dissertation examined bottlenose dolphin vocal modifications during various experimental noise treatments. Acoustic recordings previously obtained for bottlenose …
Reassessment Of The Extinction Risk Of The Neotropical Freshwater Crabs Of The Family Pseudothelphusidae, Ada Acevedo Alonso
Reassessment Of The Extinction Risk Of The Neotropical Freshwater Crabs Of The Family Pseudothelphusidae, Ada Acevedo Alonso
All NMU Master's Theses
The Neotropical region is one of the world’s biodiversity hotspots, and its freshwater crabs are notably diverse, and are represented by two families, Pseudothelphusidae and Trichodactylidae. This study focuses on this region’s highly diverse Pseudothelphusidae which includes 48 genera and 289 species. The 2008 IUCN global conservation assessment found 15.5% of the Pseudothelphusidae to be threatened with extinction and projected that in the worst-case scenario (if all of the Data Deficient species turned out to be threatened), the number of threatened species would be significantly higher. In the last decade several new species of pseudothelphusids have been described, and more …
The Relationship Between Coat Color And Dominance In Female Sable Antelope Over Time, Taylor Wilson
The Relationship Between Coat Color And Dominance In Female Sable Antelope Over Time, Taylor Wilson
Undergraduate Honors Thesis Projects
Sable antelope (Hippotragus niger)exhibit sexual dimorphism, where males and females look different from each other in color and size. Within this difference between the sexes, there are a wide spectrum in coat colors among females, ranging from light tan to dark brown. The variations seen in female coat color in other species are known to be hormonally caused by testosterone. Testosterone levels are also related to dominance within the herd in other species. The first objective of this study is to determine if the variations in coat color are associated with the dominance hierarchy among female sable …
Morphological And Color Variation In Poicephalus Parrots, Eileen Connon
Morphological And Color Variation In Poicephalus Parrots, Eileen Connon
Undergraduate Honors Thesis Projects
Though describing and delimiting species is one of the principle aspects of many disciplines within biology, there is often debate about which methods and concepts should be used to make such decisions. The Tobias criteria for quantitative species delimitation represent one attempt to create a standard method of delimiting species based on the morphological species concept. However, previous examples of using these criteria have not always been completely quantitative. This study uses quantitative morphological and color data of three Poicephalusparrots as a case study for the effectiveness of the Tobias criteria. The results show varying levels of support for …
Guided Alligator Tours Or Raccoon Schooling (Gators), Paul List
Guided Alligator Tours Or Raccoon Schooling (Gators), Paul List
Senior Theses
In my two main internships during college, I worked closely with two very different animals: raccoons and alligators. Additionally, I gained experience in presenting educational programs during my internship at Fripp Island, where my most common program was our Gator Walk. For my thesis project, I built upon my experience in interpretive programming, drawing on my experience with alligators and raccoons to develop a unique educational program to present at Congaree National Park. This report will describe the process of developing this program as well as it’s implementation and outcomes. In addition, it includes a review of scholarly literature on …
Population Viability And Connectivity Of The Federally Threatened Eastern Indigo Snake In Central Peninsular Florida, Javan Bauder
Population Viability And Connectivity Of The Federally Threatened Eastern Indigo Snake In Central Peninsular Florida, Javan Bauder
Doctoral Dissertations
Understanding the factors influencing the likelihood of persistence of real-world populations requires both an accurate understanding of the traits and behaviors of individuals within those populations (e.g., movement, habitat selection, survival, fecundity, dispersal) but also an understanding of how those traits and behaviors are influenced by landscape features. The federally threatened eastern indigo snake (EIS, Drymarchon couperi) has declined throughout its range primarily due to anthropogenically-induced habitat loss and fragmentation making spatially-explicit assessments of population viability and connectivity essential for understanding its current status and directing future conservation efforts. The primary goal of my dissertation was to understand how …
Assessment Of Wildlife Rehabilitation Trends: Domestic Dog And Cat Attacks, Rachel Wilson
Assessment Of Wildlife Rehabilitation Trends: Domestic Dog And Cat Attacks, Rachel Wilson
Undergraduate Honors Thesis Projects
Human-wildlife conflict is a growing concern, and domestic cat predation is estimated to be responsible for billions of wildlife deaths every year in the Unites States. Domestic dog predation has been less well studied, but as dogs are the second most numerous pet in the U.S. after cats, their impact on native wildlife should also be assessed. One method to assess domestic animal predation is to examine trends in wildlife rehabilitation records. Using the online database WILD-ONe, I analyzed over 31,000 wildlife hospital records in the United States from 2011-2016. During this time span, data showed over 14,000 domestic dog …
The Influence Of Pointing Accuracy In An Object-Choice Task With Domestic Horses (Equus Caballus), Elizabeth A. Krisch
The Influence Of Pointing Accuracy In An Object-Choice Task With Domestic Horses (Equus Caballus), Elizabeth A. Krisch
Theses and Dissertations
This study evaluated the influence of pointing accuracy and experimenter identity on domestic horse (Equus caballus) behavior in an object-choice task. Results suggest that after receiving inaccurate pointing cues, horses adapt their responses based on their familiarity with an experimenter, and exhibit signs of memory retention across test trials.
Dolphins In Space: Quantifying The Relative Positions Of Bottlenose Dolphins (Tursiops Truncatus), Megan S. Mcgrath
Dolphins In Space: Quantifying The Relative Positions Of Bottlenose Dolphins (Tursiops Truncatus), Megan S. Mcgrath
Theses and Dissertations
Bottlenose dolphins (Tursiops truncatus) are socially sophisticated mammals with high fission-fusion dynamics and complex communication. The relative positioning of individual dolphins as they swim within their social group may aid in the expression of social roles. This study sought to quantify relative positioning in a small social group of female bottlenose dolphins at the National Aquarium in Baltimore that included two mother-daughter pairs, maternal and paternal half-sisters, a half-aunt and niece, and one unrelated female. We devised a method for scoring relative positioning in three dimensions. We found that the two mothers and their juvenile and adult daughters …
The Morphology And Evolution Of The Primate Brachial Plexus, Brian M. Shearer
The Morphology And Evolution Of The Primate Brachial Plexus, Brian M. Shearer
Dissertations, Theses, and Capstone Projects
Primate evolutionary history is inexorably linked to the evolution of a broad array of locomotor adaptations that have facilitated the clade’s invasion of new niches. Researchers studying the evolution of primates and of their individual locomotor adaptations have traditionally relied on bony morphology – a practical choice given the virtual non-existence of any other type of tissue in the fossil record. However, this focus downplays the potential importance of the many other structures involved in locomotion, such as muscle, cartilage, and neural tissue, which may each be influenced by separate selective forces because of their different roles in facilitating movement. …
Habitat Usage Patterns Of Bottlenose Dolphins (Tursiops Truncatus) In Terrebonne And Timbalier Bays, Louisiana, Mary Allison Manning
Habitat Usage Patterns Of Bottlenose Dolphins (Tursiops Truncatus) In Terrebonne And Timbalier Bays, Louisiana, Mary Allison Manning
LSU Master's Theses
I coupled fine-scale environmental data with observed behavior and group composition data to examine overall distribution within the bay system and to characterize the habitat associated with foraging and the presence of calves. Semi-isolated populations of bottlenose dolphins (Tursiops truncatus) along Louisiana’s coast are undergoing increased risks from boat traffic, oil spills, land subsidence, and planned water diversions (CPRA 2017). Characterizing the habitat use of bottlenose dolphins in Terrebonne and Timbalier bays, Louisiana, is important given the likely high site fidelity, small home ranges, and low exchange of individuals with nearby coastal populations (Lane et al. 2015, McDonald …
Effects Of Energy Development On Movements, Home Ranges, And Resource Selection Of White-Tailed Deer In The Western Dakotas, Bailey S. Gullikson
Effects Of Energy Development On Movements, Home Ranges, And Resource Selection Of White-Tailed Deer In The Western Dakotas, Bailey S. Gullikson
Electronic Theses and Dissertations
Oil and natural gas development has increased in recent years and research is needed to assess potential impacts on white-tailed deer (Odocoileus virginianus) populations. Our objectives were to document movements, home ranges, and resource selection of female white-tailed deer in response to energy development in the western Dakotas. Our study areas included Dunn County, North Dakota, an area with current oil and gas development, and Grant County, North Dakota, and Perkins County, South Dakota, areas without current oil and gas development. We captured and fitted 150 female deer with Very High Frequency (VHF) collars across study sites, and …
Long-Term Effects Of Different Fat Sources And Vitamin E Supplementation On Growth Performance, Antioxidant Status, Carcass Characteristics, Meat Quality, And Immune Capacity Of Pigs With Heavy Slaughter Weight Up To 150 Kg, Ding Wang
Theses and Dissertations--Animal and Food Sciences
Two experiments were used to evaluate the potential interaction of fat source and vitamin E (VE) in heavy slaughter weight pigs. In Experiment 1, a total of 64 individually-fed pigs (28.41 ± 0.83 kg) were randomly assigned to 8 dietary treatments in a 4×2 factorial arrangement. Fat treatments included cornstarch (CS), tallow (TW), corn-oil (CO), and coconut-oil (CN). VE treatments were dietary α-tocopheryl acetate (ATA) at 11 and 200 ppm. In Experiment 2, a total of 72 individually fed pigs (28.55 ± 1.16 kg) were randomly assigned to 12 dietary treatments in a 2 × 6 factorial arrangement. Fat treatments …
Evaluating Spatial Distributions Of Scent-Marks In Semi-Free-Ranging Groups Of Lemur Catta At The Duke Lemur Center, Shallu Prasher
Evaluating Spatial Distributions Of Scent-Marks In Semi-Free-Ranging Groups Of Lemur Catta At The Duke Lemur Center, Shallu Prasher
Graduate Research Theses & Dissertations
Scent-marking is a widespread form of olfactory signaling exhibited in mammals and for a select group of primates. Although research exists on the process of scent-marking, surface preferences, and for the function of scent-marking in lemurs, analyses of how lemur group scent-marking distributions map onto their home range are lacking. The endangered ring-tailed lemur (Lemur catta) deposits scent-marks using its ano-genital, chest, and wrist glands. This project was designed to collect data on two groups of semi-free-ranging captive ring-tailed lemurs at the Duke Lemur Center to first assess how scent-marks are distributed within their home ranges; and second, to evaluate …
Movement Ecology Of A Cryptic Ambush Predator: Integrating Radio Telemetry And Tri-Axial Accelerometry To Evaluate Spatial Strategies And Activity Patterns By Western Diamond-Backed Rattlesnakes (Crotalus Atrox), Dominic L. Desantis
Open Access Theses & Dissertations
An animal's decision to move from one location to another within its environment is determined by a complex blend of internal and external factors. Teasing apart the relative roles of specific variables in this web of interacting mechanisms has been a long-standing challenge in animal movement ecology. Historically, this problem was viewed as a sort of black box for which a myriad of methodological limitations precluded rigorous study. Recently, a diversity of animal-borne transmitters and dataloggers (i.e., bio-loggers) have circumvented many of these traditional limitations and transformed field studies of animal movement, behavior, and physiology - in some cases, allowing …
White-Nose Syndrome And Immune Responses In A Resistant Bat Species (Eptesicus Fuscus), Keslie Skye Naffa
White-Nose Syndrome And Immune Responses In A Resistant Bat Species (Eptesicus Fuscus), Keslie Skye Naffa
MSU Graduate Theses
White-nose syndrome (WNS) has had a large negative impact on bat populations across eastern North America since its arrival in 2006. Bats affected by WNS appear to die of starvation, possibly due to the increased arousals during hibernation when there is no food present to replace the energy used to arouse. During hibernation, the bat’s immune system should be suppressed. However, once a bat of a susceptible species is exposed to the fungus that causes WNS, Psuedogymnoascus destructans (Pd), the immune system seems to respond, potentially causing an elevation in metabolic rate, which may cause the bat to …
Activity Budgets And Behavior Of Captive Black-Handed Spider Monkeys (Ateles Geoffroyi) At The Central Florida Zoo And Botanical Gardens, Stephanie Hargrave
Activity Budgets And Behavior Of Captive Black-Handed Spider Monkeys (Ateles Geoffroyi) At The Central Florida Zoo And Botanical Gardens, Stephanie Hargrave
Honors Undergraduate Theses
Establishing baseline activity budgets for zoo-housed captive animals can be important in tracking behavior changes that may indicate medical or other concerns, as well as assessing overall welfare and the need for implementation of interventions such as increased amounts of enrichment. This study sought to calculate activity budgets for the current spider monkeys residing at the Central Florida Zoo, a father-daughter pair of Ateles geoffroyi. Having a baseline activity budget is also valuable because major changes in behavior may accompany the upcoming introduction of new individuals to this particular group of spider monkeys. BORIS behavior coding software was used to …
Screening Development For Anti-Hemotoxic Activity Of Thai Herbs Against Eastern Russell’S Viper Daboia Siamensis (Smith, 1917) Venom, Patchara Sittishevapark
Screening Development For Anti-Hemotoxic Activity Of Thai Herbs Against Eastern Russell’S Viper Daboia Siamensis (Smith, 1917) Venom, Patchara Sittishevapark
Chulalongkorn University Theses and Dissertations (Chula ETD)
The eastern Russell’s viper, Daboia siamensis, is one of the important venomous snakes in Thailand. Its venom possesses hematotoxin causing pathological alterations to circulatory and renal systems. Although antivenom serum is used for standard medical treatment, its cost per dose, ineffectiveness for some symptoms, and potential to develop allergic reactions in patients has called attention to an alternative remedy including the medicinal herb. To find effective herbs, appropriate screening assays are needed. This study aims to develop in vitro and in vivo screening assays and use for screening Thai herbs with anti-hematotoxic activity against D. siamensis venom. For in vitro …