Nonspreading Solutions In Integro-Difference Models With Allee And Overcompensation Effects.,
2017
University of Louisville
Nonspreading Solutions In Integro-Difference Models With Allee And Overcompensation Effects., Garrett Luther Otto
Electronic Theses and Dissertations
Previous work in Integro-Difference models have generally considered Allee effects and over-compensation separately, and have either focused on bounded domain problems or asymptotic spreading results. Some recent results by Sullivan et al. (2017 PNAS 114(19), 5053-5058) combining Allee and over-compensation in an Integro-Difference framework have shown chaotic fluctuating spreading speeds. In this thesis, using a tractable parameterized growth function, we analytically demonstrate that when Allee and over-compensation are present solutions which persist but essentially remain in a compact domain exist. We investigate the stability of these solutions numerically. We also numerically demonstrate the existence of such solutions for more general …
The Cost Of Roaming Free: Assessing The Effects Of Plant Secondary Metabolites On Diet Selection And Nutritional Condition In A Free-Ranging Generalist Herbivore,
2017
Boise State University
The Cost Of Roaming Free: Assessing The Effects Of Plant Secondary Metabolites On Diet Selection And Nutritional Condition In A Free-Ranging Generalist Herbivore, Daniel Patrick Melody
Boise State University Theses and Dissertations
Large vertebrate herbivores have a wide variety of browsing options available. However, most plants contain a suite of plant secondary metabolites (PSMs) that can have toxic effects when ingested. Herbivores must therefore make dietary choices that minimize the potentially harmful effects of PSM ingestion and maximize the use of available nutrients and protein. During winter months, in northern latitudes, climatological factors restrict browsing options and many populations of herbivores must subsist primarily on forage that is relatively poor in nutritional quality and high in PSMs. Many species of herbivores have developed a suite of behavioral and physiological adaptations to cope …
Genomic Data Reveal A Loss Of Diversity In Two Species Of Tuco-Tucos (Genus Ctenomys) Following A Volcanic Eruption,
2017
Chapman University
Genomic Data Reveal A Loss Of Diversity In Two Species Of Tuco-Tucos (Genus Ctenomys) Following A Volcanic Eruption, Jeremy L. Hsu, Jeremy Chase Crawford, Mauro N. Tammone, Uma Ramakrishnan, Eileen A. Lacey, Elizabeth A. Hadly
Biology, Chemistry, and Environmental Sciences Faculty Articles and Research
Marked reductions in population size can trigger corresponding declines in genetic variation. Understanding the precise genetic consequences of such reductions, however, is often challenging due to the absence of robust pre- and post-reduction datasets. Here, we use heterochronous genomic data from samples obtained before and immediately after the 2011 eruption of the Puyehue-Cordón Caulle volcanic complex in Patagonia to explore the genetic impacts of this event on two parapatric species of rodents, the colonial tuco-tuco (Ctenomys sociabilis) and the Patagonian tuco-tuco (C. haigi). Previous analyses using microsatellites revealed no post-eruption changes in genetic variation in C. …
Evaluating The Ecological Status Of The Introduced Nile Monitor (Varanus Niloticus) In Florida: Forecasting Presence And Population Expansion Using Computational Geographic Information Systems,
2017
Nova Southeastern University
Evaluating The Ecological Status Of The Introduced Nile Monitor (Varanus Niloticus) In Florida: Forecasting Presence And Population Expansion Using Computational Geographic Information Systems, Noah G. Cohen
HCNSO Student Theses and Dissertations
The Nile monitor (Varanus niloticus) is a large, carnivorous lizard that has become a notorious invasive species in Florida, USA. Initially released in the 1980s from the pet trade, the species has since established at least three breeding populations and spread throughout much of southern Florida. While current control efforts have failed to eradicate V. niloticus, it is important to attain a better understanding of its invasive dynamics to guide and inform better control strategies. In this study, available georeferenced records of V. niloticus in Florida were compiled and linked to a habitat classification map to evaluate ecotype preferences. Factored …
A Study Of The Urban Red Fox (Vulpes Vulpes) Population In Baton Rouge, Louisiana Using Social Media,
2017
Louisiana State University and Agricultural and Mechanical College
A Study Of The Urban Red Fox (Vulpes Vulpes) Population In Baton Rouge, Louisiana Using Social Media, Ahsennur Soysal
LSU Master's Theses
Foxes are timid yet resourceful animals that are integrated into many urban environments. Because they are elusive, collecting information about the number of urban foxes, their diet and spatial distribution, their interactions with the ecological community in their urban habitat, as well as residents’ response to them, is difficult. Involving stakeholders to participate in the data collection on wildlife via citizen science on social media is one way to overcome this complication, while simultaneously engaging residents in the ecology happening around them. Therefore, we used social media as the platform to engage the public to document and map the foxes …
Introgression Makes Waves In Inferred Histories Of Effective Population Size,
2017
University of Wisconsin-Madison
Introgression Makes Waves In Inferred Histories Of Effective Population Size, John Hawks
Human Biology Open Access Pre-Prints
Human populations have a complex history of introgression and of changing population size. Human genetic variation has been affected by both these processes, so that inference of past population size depends upon the pattern of gene flow and introgression among past populations. One remarkable aspect of human population history as inferred from genetics is a consistent “wave” of larger effective population size, found in both African and non-African populations, that appears to reflect events prior to the last 100,000 years. Here I carry out a series of simulations to investigate how introgression and gene flow from genetically divergent ancestral populations …
The Utility Of Bioenergetics Modelling In Quantifying Predation Rates Of Marine Apex Predators: Ecological And Fisheries Implications,
2017
James Cook University, Townsville, Queensland, Australia
The Utility Of Bioenergetics Modelling In Quantifying Predation Rates Of Marine Apex Predators: Ecological And Fisheries Implications, A. Barnett, M. Braccini, C. L. Dudgeon, N. L. Payne, K. G. Abrantes, M. Sheaves, E. P. Snelling
Fisheries Research Articles
Predators play a crucial role in the structure and function of ecosystems. However, the magnitude of this role is often unclear, particularly for large marine predators, as predation rates are difficult to measure directly. If relevant biotic and abiotic parameters can be obtained, then bioenergetics modelling offers an alternative approach to estimating predation rates, and can provide new insights into ecological processes. We integrate demographic and ecological data for a marine apex predator, the broadnose sevengill shark Notorynchus cepedianus, with energetics data from the literature, to construct a bioenergetics model to quantify predation rates on key fisheries species in …
The North American Quails, Partridges, And Pheasants,
2017
University of Nebraska-Lincoln
The North American Quails, Partridges, And Pheasants, Paul A. Johnsgard
Zea E-Books Collection
This book documents the biology of six species of New World quails that are native to North America north of Mexico (mountain, scaled, Gambel’s, California, and Montezuma quails, and the northern bobwhite), three introduced Old World partridges (chukar, Himalayan snowcock, and gray partridge), and the introduced common (ring-necked) pheasant. Collectively, quails, partridges, and pheasants range throughout all of the continental United States and the Canadian provinces. Two of the species, the northern bobwhite and ring-necked pheasant, are the most economically important of all North American upland game birds. All of the species are hunted extensively for sport and are highly …
Modeling Vaccination Strategies To Control White-Nose Syndrome In Little Brown Bat Colonies,
2017
St. Olaf College
Modeling Vaccination Strategies To Control White-Nose Syndrome In Little Brown Bat Colonies, Eva Cornwell, David Elzinga, Shelby Stowe, Alex Capaldi
Annual Symposium on Biomathematics and Ecology Education and Research
No abstract provided.
Co-Existence Of Microbial Ecology In A Chemostat Using A Robust Feedback,
2017
Universidad Autonoma Metropolitana
Co-Existence Of Microbial Ecology In A Chemostat Using A Robust Feedback, Hector Puebla, Mariana Rodriguez-Jara, Margarita M. Gonzalez-Brambila, Eliseo Hernandez-Martinez, Alejandra Velasco-Perez, Ennio Piceno-Diaz
Annual Symposium on Biomathematics and Ecology Education and Research
No abstract provided.
Handicap Principle Implies Emergence Of Dimorphic Ornaments,
2017
Northwestern University
Handicap Principle Implies Emergence Of Dimorphic Ornaments, Sara Clifton, Daniel M. Abrams, Rosemary I. Braun
Annual Symposium on Biomathematics and Ecology Education and Research
No abstract provided.
Food Web Control And Synchronization Using A Robust Feedback,
2017
Universidad Autonoma Metropolitana
Food Web Control And Synchronization Using A Robust Feedback, Hector Puebla, Mariana Rodriguez-Jara, Cesar S. Lopez-Monsalvo, Eliseo Hernandez-Martinez, Alejandra Velasco-Perez
Annual Symposium on Biomathematics and Ecology Education and Research
No abstract provided.
Mosquito Ecology, Arbovirus Dynamics, And Control,
2017
Illinois State University
Mosquito Ecology, Arbovirus Dynamics, And Control, Cynthia Lord
Annual Symposium on Biomathematics and Ecology Education and Research
No abstract provided.
Hierarchy Establishment From Nonlinear Social Interactions And Metabolic Costs: An Application To The Harpegnathos Saltator,
2017
Arizona State University at the Tempe Campus
Hierarchy Establishment From Nonlinear Social Interactions And Metabolic Costs: An Application To The Harpegnathos Saltator, Armando Salinas Iii
Annual Symposium on Biomathematics and Ecology Education and Research
No abstract provided.
Spatio-Temporal Metapopulation Dynamics In A Small Network Of Freshwater Ponds,
2017
Illinois State University
Spatio-Temporal Metapopulation Dynamics In A Small Network Of Freshwater Ponds, Christopher J. Holmes
Annual Symposium on Biomathematics and Ecology Education and Research
No abstract provided.
Modeling The Influence Of El Niño On Parasite Transmission In Sand Crab Populations And Seabird Abundance Along The California Coast,
2017
University of Wisconsin-La Crosse
Modeling The Influence Of El Niño On Parasite Transmission In Sand Crab Populations And Seabird Abundance Along The California Coast, James Peirce, Olcay Akman, Abou Seck
Annual Symposium on Biomathematics and Ecology Education and Research
No abstract provided.
Cnemidophorus Sexlineatus And The Impacts The Environment Has On Its Population At The Braidwood Dunes,
2017
Illinois State University
Cnemidophorus Sexlineatus And The Impacts The Environment Has On Its Population At The Braidwood Dunes, Jeremiah Soto
Annual Symposium on Biomathematics and Ecology Education and Research
No abstract provided.
A Stochastic Epidemiological Model Of The Response Of American Chestnut Populations To Fungal Blight,
2017
Truman State University
A Stochastic Epidemiological Model Of The Response Of American Chestnut Populations To Fungal Blight, Kelsey Lieberman, Rebecca Rouleau, Anita Davelos Baines, Martin Allen
Annual Symposium on Biomathematics and Ecology Education and Research
No abstract provided.
Mismeasured Mortality: Correcting Estimates Of Wolf Poaching In The United States,
2017
University of Wisconsin-Madison
Mismeasured Mortality: Correcting Estimates Of Wolf Poaching In The United States, Adrian Treves, Kyle A. Artelle, Chris T. Darimont, David R. Parsons
Wildlife Population Management Collection
Measuring rates and causes of mortalities is important in animal ecology and management. Observing the fates of known individuals is a common method of estimating life history variables, including mortality patterns. It has long been assumed that data lost when known animals disappear were unbiased. We test and reject this assumption under conditions common to most, if not all, studies using marked animals. We illustrate the bias for 4 endangered wolf populations in the United States by reanalyzing data and assumptions about the known and unknown fates of marked wolves to calculate the degree to which risks of different causes …
Surveys Of The Street And Private Dog Population: Jamnagar, Gujarat India,
2017
Humane Society International
Surveys Of The Street And Private Dog Population: Jamnagar, Gujarat India, Tamara Kartal, Amit Chaudhari
Stray and Feral Animal Populations Collection
Humane Society International (HSI) conducted two dog population surveys in all 4 Zones of Jamnagar (human population of 609,613). One was a street dog survey and the other was a survey of the private (pet) dog population.
