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Articles 7441 - 7470 of 12834
Full-Text Articles in Entire DC Network
Gazetteer And Site-Based History Of The Ornithology Of Sabah. Malaysian Borneo, Frederick H. Sheldon
Gazetteer And Site-Based History Of The Ornithology Of Sabah. Malaysian Borneo, Frederick H. Sheldon
Occasional Papers of the Museum of Natural Science, Louisiana State University
The gazetteer lists sites in the state of Sabah, Malaysia, where birds have been collected, studied, or watched. Its purpose is to identify locations for research and birding in Sabah and to provide a brief scientific history of the more important sites. Each site description includes latitude, longitude, and general information on location. For many sites, elevation, habitat, scientific or birdwatching importance, historical notes, citations of key papers, specimen records, and records of certain species are also included.
Wildfire Disturbance And Productivity As Drivers Of Plant Species Diversity Across Spatial Scales, Laura A. Burkle, Jonathan A. Myers, R Travis Belote
Wildfire Disturbance And Productivity As Drivers Of Plant Species Diversity Across Spatial Scales, Laura A. Burkle, Jonathan A. Myers, R Travis Belote
Biology Faculty Research
Wildfires influence many temperate terrestrial ecosystems worldwide. Historical environmental heterogeneity created by wildfires has been altered by human activities and will be impacted by future climate change. Our ability to predict the impact of wildfire-created heterogeneity on biodiversity is limited because few studies have investigated variation in community composition (beta-diversity) in response to fire. Wildfires may influence beta-diversity through several ecological mechanisms. First, high-severity fires may decrease beta-diversity by homogenizing species composition when they create landscapes dominated by disturbance-tolerant or rapidly colonizing species. In contrast, mixed-severity fires may increase beta-diversity by creating mosaic landscapes containing habitats that support species with …
Constraints On The Evolution Of Phenotypic Plasticity: Limits And Costs Of Phenotype And Plasticity, C. J. Murren, Josh R. Auld, H. Callahan, C. K. Ghalambor, C. A. Handelsman, M. A. Heskel, J. G. Kingsolver, H. J. Maclean, J. Masel, H. Maughan, D. W. Pfennig, R. A. Relyea, S. Seiter, E. Snell-Rood, U. K. Steiner, C. D. Schlichting
Constraints On The Evolution Of Phenotypic Plasticity: Limits And Costs Of Phenotype And Plasticity, C. J. Murren, Josh R. Auld, H. Callahan, C. K. Ghalambor, C. A. Handelsman, M. A. Heskel, J. G. Kingsolver, H. J. Maclean, J. Masel, H. Maughan, D. W. Pfennig, R. A. Relyea, S. Seiter, E. Snell-Rood, U. K. Steiner, C. D. Schlichting
Biology Faculty Publications
No abstract provided.
Evidence Of Evolution 3: Evolutionary Evidence And Inferences Lab: A Discussion Guide, Imsa Biology Team
Evidence Of Evolution 3: Evolutionary Evidence And Inferences Lab: A Discussion Guide, Imsa Biology Team
Evolution
This lab activity was designed to provide you with opportunities to make inferences and draw conclusions about evolution and the common ancestry of various animals based on their anatomical characteristics and comparative anatomy. You will be given tasks to accomplish or questions to answer at each of 11 stations. In order to do this successfully, you must make careful observations of the specimens on display.
Evidence Of Evolution 2: Definitions For Evolutionary Evidence Lab, Imsa Biology Team
Evidence Of Evolution 2: Definitions For Evolutionary Evidence Lab, Imsa Biology Team
Evolution
This lab activity was designed to provide you with opportunities to make inferences and draw conclusions about evolution and the common ancestry of various animals based on their anatomical characteristics and comparative anatomy. You will be given tasks to accomplish or questions to answer at each of 11 stations. In order to do this successfully, you must make careful observations of the specimens on display. You must also know the following definitions before beginning this activity:
Temporal Variability And Cooperative Breeding: Testing The Bet-Hedging Hypothesis In The Acorn Woodpecker, Walter D. Koenig, Eric L. Walters
Temporal Variability And Cooperative Breeding: Testing The Bet-Hedging Hypothesis In The Acorn Woodpecker, Walter D. Koenig, Eric L. Walters
Biological Sciences Faculty Publications
Cooperative breeding is generally considered an adaptation to ecological constraints on dispersal and independent breeding, usually due to limited breeding opportunities. Although benefits of cooperative breeding are typically thought of in terms of increased mean reproductive success, it has recently been proposed that this phenomenonmay be a bet-hedging strategy that reduces variance in reproductive success (fecundity variance) inpopulations living inhighly variable environments. We tested this hypothesis using long-term data on the polygynandrous acorn woodpecker (Melanerpes formicivorus). In general, fecundity variance decreased with increasing sociality, at least when controlling for annual variation in ecological conditions. Nonetheless, decreased fecundity variance …
Wildlife Crime And Other Challenges To Resource System Resilience, Patricia Anne Raxter
Wildlife Crime And Other Challenges To Resource System Resilience, Patricia Anne Raxter
Graduate Program in International Studies Theses & Dissertations
Although wildlife crime has exploded in Africa over the past decade —“commercial poaching” now kills an estimated eight percent of the continent’s elephant population each year—some governments have proven more successful than others at protecting wildlife and preserving habitats. To explain this variation, this study examines how the policies of three states (Kenya, Tanzania, and Botswana) have enhanced or undermined the resilience of the continent’s elephant ecosystem. Using the social-ecological system framework, the study illustrates how each state’s changing practices have either exacerbated the stresses wrought by wildlife crime or successfully protected local populations from poaching. The study finds that …
The Effects Of Urbanization On Tick Parasitism Rates In Birds Of Southeastern Virginia, Erin Leigh Heller
The Effects Of Urbanization On Tick Parasitism Rates In Birds Of Southeastern Virginia, Erin Leigh Heller
Biological Sciences Theses & Dissertations
The coastal region of southeastern Virginia is one of the largest urban areas along one of North America’s migratory flyways. Because hundreds of avian species use this flyway, understanding factors affecting birds and their health is of paramount concern. Within this region, 14 species of ticks have been documented, all of which may serve as vectors of mammal (including human) pathogens. By sampling birds at sites of varying levels of urbanization within the coastal southeastern urban matrix, I studied the relationship between ticks and their avian hosts, and how this relationship varies seasonally. Mistnets were set-up at five permanent sites …
Bleaching, Disease, And Colonization: The Ecology Of Coral Health In Southeastern Nosy Be, Madagascar, Luella Allen-Waller
Bleaching, Disease, And Colonization: The Ecology Of Coral Health In Southeastern Nosy Be, Madagascar, Luella Allen-Waller
Independent Study Project (ISP) Collection
Coral reefs constitute irreplaceable networks of marine biodiversity as well as an important economic resource to many coastal communities in the tropics. Many factors threaten these fragile ecosystems worldwide: overfishing, pollution, ocean acidification, and increasing sea temperatures all interact to diminish reef-building coral health in a variety of ways. This study aims to characterize the taxonomic and spatial patterns of several acute negative health conditions affecting hard corals in and near Lokobe National Park, Nosy Be, Madagascar. Bleaching, coral disease, filamentous algal overgrowth, and soft coral colonization were surveyed at six fringing reef sites representing different ecological zones. While Acropora …
Abejas Silvestres (Himenóptera: Apoidea) En La Neblina: Análisis De La Diversidad, Interacciones, Y Potencial Para Miel En Un Remanente De Bosque Nublado, Jen Hayes
Independent Study Project (ISP) Collection
Las abejas (Himenóptera: Apoidea) se encuentran en casi cada una de las bioregiones en el mundo. Su composición es muy diversa en los neotrópicos. Las abejas silvestres (no-Apis) representan casi el 90% de las especies de abejas en todo el mundo (Parra, 2005). Los objetivos principales de este estudio fueron realizar un inventario de las especies de abejas al final de la estación seca, observar sus interacciones intra-específicas, y determinar el potencial de producción de miel medicinal de las abejas sin aguijón (Apidae: Meliponini). El estudio fue realizado en la Reserva Inti Llacta, un remanente de bosque nublado …
Assessment Of Coral Health And Fish Diversity In The Fringing Reefs Of Porvenir Island And Korbisky Island, Guna Yala, Panama, Emily Waddell
Assessment Of Coral Health And Fish Diversity In The Fringing Reefs Of Porvenir Island And Korbisky Island, Guna Yala, Panama, Emily Waddell
Independent Study Project (ISP) Collection
Coral reefs are the most diverse and productive ecosystems on Earth, serving as important habitats to millions of organisms; however, they are disappearing at alarming rates. The major influences causing their decline are the combined effects of global climate change and increased industrialization, urbanization, and agriculture. Previous studies have correlated high coral coverage with high fish diversity; therefore, as coral reefs disappear, so too does fish diversity. This study assesses the health of the fringe reefs of Porvenir Island and Korbisky Island in Guna Yala, Panama by recording the live coral, bleached coral, diseased coral, and algae cover of each …
Jane Claire Dirks's Correspondence With Stanley G. Jewett, Jane Claire Dirks-Edmunds, Stanley G. Jewett
Jane Claire Dirks's Correspondence With Stanley G. Jewett, Jane Claire Dirks-Edmunds, Stanley G. Jewett
Jane Claire Dirks-Edmunds Documents
This exchange between Jane Claire Dirks (later Jane Claire Dirks-Edmunds) and Stanley G. Jewett, a biologist with Region 1 of the Fish and Wildlife Service (serving Oregon and five other states), is an example of the type of correspondence Dirks had with various experts on the Pacific forest region while she was completing her doctoral thesis. Dirks-Edmunds began to study Zoology in Illinois immediately after earning her Bachelor's degree in Biology from Linfield College in 1937. She returned to teach in the Biology department at Linfield from 1941-1974.
Plant Index Card For Rubus Parviflorus,Western Thimbleberry, Jane Claire Dirks-Edmunds
Plant Index Card For Rubus Parviflorus,Western Thimbleberry, Jane Claire Dirks-Edmunds
Jane Claire Dirks-Edmunds Documents
This is one example of a research card used by Dr. Jane Claire Dirks-Edmunds. Dirks-Edmunds used these cards to catalog the plants, animals, and insects at her Saddleback Mountain research site during the 1950s. This card has notes on Rubus parviflorus (thimbleberry) a part of the Rosaceae (rose) family.
Book Reviews, Robert D. Aldridge, Michael B. Thompson, Malorie M. Hayes, Rafael O. De Sá, Christopher G. Lowe
Book Reviews, Robert D. Aldridge, Michael B. Thompson, Malorie M. Hayes, Rafael O. De Sá, Christopher G. Lowe
Biology Faculty Publications
Reproductive Biology and Phylogeny of Lizards and Tuatara. J. L. Rheubert, D. S. Siegel, and S. E. Trauth (Eds.). 2014. CRC Press. ISBN 9781466579866. 760 p. $143.96 (hardcover).—
According to the authors, this book was intended to summarize the current knowledge of phylo- geny and reproduction of the Lepidosauria. I believe the authors have achieved their goal. Many of the chapters in this book are derived from presentations that took place at the Symposium on Reproductive Biology of Lizards at the Joint Meeting of Ichthyologists and Herpetologists held in Chattanooga, Tennessee in 2014. Although the majority of the authors are …
A Generalist Brood Parasite Modifies Use Of A Host In Response To Reproductive Success, Matthew I M Louder, Wendy M. Schelsky, Amber N. Albores, Jeffrey P. Hoover
A Generalist Brood Parasite Modifies Use Of A Host In Response To Reproductive Success, Matthew I M Louder, Wendy M. Schelsky, Amber N. Albores, Jeffrey P. Hoover
Publications and Research
Avian obligate brood parasites, which rely solely on hosts to raise their young, should choose the highest quality hosts to maximize reproductive output. Brown-headed cowbirds (Molothrus ater) are extreme host generalists, yet female cowbirds could use information based on past reproductive outcomes to make egg-laying decisions thus minimizing fitness costs associated with parasitizing low quality hosts. We use a long-term (21 years) nest box study of a single host, the prothonotary warbler (Protonotaria citrea), to show that local cowbird reproductive success, but not host reproductive success, was positively correlated with the probability of parasitism the following …
Community Involvement To Address A Long-Standing Invasive Species Problem: Aspects Of Civic Ecology In Practice, Rebecca W. Dolan, Kelly Harris, Mark Adler
Community Involvement To Address A Long-Standing Invasive Species Problem: Aspects Of Civic Ecology In Practice, Rebecca W. Dolan, Kelly Harris, Mark Adler
Scholarship and Professional Work - LAS
Invasive non-native species (INS) are found in every city around the globe, but their impacts in urban settings as biological agents of visual pollution that block views of natural landscapes and disconnect citizens from nature are not as often addressed as comprehensively as their impacts in natural areas or agricultural settings. The multiple impacts of INS in cities make them ideal candidates for aspects of Civic Ecology Practice, where local environmental stewardship action is taken to enhance green infrastructure and community well-being in urban and other human-dominated systems. We present details of a community driven program focused on removal of …
Spreading Holiday Spirit And Northwestern Salamanders, Ambystoma Gracile (Baird 1859) (Caudata: Ambystomatidae), Across The Usa, Michael R. Rochford, Jeffrey M. Lemm, Kenneth Krysko, Louis A. Somma, Robert W. Hansen, Frank J. Mazzotti
Spreading Holiday Spirit And Northwestern Salamanders, Ambystoma Gracile (Baird 1859) (Caudata: Ambystomatidae), Across The Usa, Michael R. Rochford, Jeffrey M. Lemm, Kenneth Krysko, Louis A. Somma, Robert W. Hansen, Frank J. Mazzotti
Papers in Herpetology
Introduced species of amphibians and reptiles are of growing conservation concern (Bury and Luckenbach 1976; Krysko et al. 2011; Meshaka 2011). Unintentional introductions result largely from individuals escaping from enclosures or hitch-hiking in cargo or on vehicles, whereas intentional introductions occur primarily because a species is perceived to be of value to humans or from deliberately releasing sick or unwanted animals, including pets (Kraus 2009; Krysko et al. 2011). In Florida, most known introductions are directly related to the pet trade, but about 12% are related to the cargo pathway (Krysko et al. 2011). In this paper, we report the …
Morphological Response In Sister Taxa Of Woodrats (Genus: Neotoma) Across A Zone Of Secondary Contact, Michaela M. Koenig
Morphological Response In Sister Taxa Of Woodrats (Genus: Neotoma) Across A Zone Of Secondary Contact, Michaela M. Koenig
Master's Theses
This study focuses on a secondary contact zone between two sister species of woodrat, Neotoma fuscipes (dusky-footed woodrat) and N. macrotis (big-eared woodrat). Along the Nacimiento River, on the border of southern Monterey and northern San Luis Obispo counties, the ranges of these sister species of woodrats meet and overlap forming a secondary contact zone. The zone of secondary contact is estimated to include a 500-meter (~1,650 linear feet) portion of the Nacimiento River riparian corridor.
This research examines quantifiable morphological change that is likely associated with heightened inter-specific competition within the contact zone. When in sympatry the sister species …
Current Status Of The Northern Long-Eared Myotis (Myotis Septentrionalis) In Northwestern Nebraska, Keith Geluso, Patricia Freeman, Cliff Lemen
Current Status Of The Northern Long-Eared Myotis (Myotis Septentrionalis) In Northwestern Nebraska, Keith Geluso, Patricia Freeman, Cliff Lemen
Transactions of the Nebraska Academy of Sciences and Affiliated Societies
The Northern Long-eared Myotis (Myotis septentrionalis; Order: Chiroptera) occurs in eastern, southern, and northern Nebraska, but its current distribution in northwestern parts of the state is unclear due to its recent arrival to the region. We investigated the status of this species in the Pine Ridge via mist net (2011-2014) and acoustic surveys (2014). We documented nine species of bats in the region, including M. septentrionalis. Of 423 total bats, M. septentrionalis was represented by four individuals, the fewest of all species during our four-year survey. We only documented M. septentrionalis in Sheridan County; …
Host Promiscuity In Symbiont Associations Can Influence Exotic Legume Establishment And Colonization Of Novel Ranges, Metha M. Klock, Luke G. Barrett, Peter H. Thrall, Kyle E. Harms
Host Promiscuity In Symbiont Associations Can Influence Exotic Legume Establishment And Colonization Of Novel Ranges, Metha M. Klock, Luke G. Barrett, Peter H. Thrall, Kyle E. Harms
Faculty Publications, Environmental Studies
Aim
Invasive Acacia species have negatively impacted natural areas in multiple regions around the globe. Almost 400 Acacia species have been introduced outside their native ranges in Australia; approximately 6% have become invasive, 12% are naturalized, and 82% have no record of naturalization or invasion. This variation in invasiveness provides a comparative framework in which to examine mechanisms that either promote or constrain establishment and colonization of species in novel regions. Here, we experimentally examine the role that the legume–rhizobia symbiosis plays in the differential invasiveness of acacias introduced outside their native Australian ranges.
Location
Canberra, Australia.
Methods
We paired …
Chasin’ Tail In Southern Alabama: Delineating Programmed And Stimulus-Driven Grooming In Odocoileus Virginianus, Kyle Heine
LSU New Orleans Theses and Dissertations
This study examined variation in ectoparasite density and grooming behavior of naturally occurring white-tailed deer (Odocoileus virginianus) in southwest Alabama. Stimulus-driven grooming as well as the intraspecific body size and vigilance principles of programmed grooming were tested. During the rut, males had a higher average tick (Ixodidae) density than females and exhibited complete separation of tick parasitism between non-rutting and rutting periods, supporting the vigilance principle. Stimulus-driven grooming was supported, as both fawns and yearlings had significantly higher fly (Hippoboscidae) and combined fly/tick densities than adults, and fawns oral groomed at a significantly higher rate than adults, even …
Suitability Of Great South Bay, New York To Blooms Of Pfiesteria Piscicida And P. Shumwayae Prior To Superstorm Sandy, October 29, 2012, Pawel Tomasz Zablocki
Suitability Of Great South Bay, New York To Blooms Of Pfiesteria Piscicida And P. Shumwayae Prior To Superstorm Sandy, October 29, 2012, Pawel Tomasz Zablocki
Theses and Dissertations
Pfiesteria piscicida and P. shumwayae are toxic dinoflagellates implicated in massive fish kills in North Carolina and Maryland during 1990s. A set of physical, chemica l, and biological factors influence population dynamics of these organisms. This study employs i nformation gathered from relevant literature on temperature, salinity, dissolved oxygen, pH, turbulent mixing, and dissolved nutrients, bacteria, algae, microzooplankton, mesozooplankton, bivalve m ollusks, finfish, and other toxic dinoflagellates, which influence Pfiesteria population dynamics. The research focused on whether conditions in the Great South Bay, Long Island, New York were suitable to blooms of Pfiesteria species prior to the passage of superstorm …
Paleoepidemiology Of Intestinal Parasites And Lice In Pre-Columbian South America *, Adauto Araujo, Karl J. Reinhard, Daniela Leles, Luciana Sianto, Alena Iniguez, Martin Fugassa, Berrnardo Arriaza, Nancy Orellana, Luiz Fernando Ferreira
Paleoepidemiology Of Intestinal Parasites And Lice In Pre-Columbian South America *, Adauto Araujo, Karl J. Reinhard, Daniela Leles, Luciana Sianto, Alena Iniguez, Martin Fugassa, Berrnardo Arriaza, Nancy Orellana, Luiz Fernando Ferreira
Karl Reinhard Publications
Some human parasites originated in prehominid ancestors in Africa. Nematode species, such as Enterobius vermicularis (pinworm), hookworms and Trichuris trichiura are shared by humans and other close phylogenetic primates (Pan and Gorilla), showing that they infected a common ancestor to this group. When humans migrated from Africa to other continents they carried these parasites wherever climate conditions allowed parasite transmission from host to host. Other parasites, however, were acquired throughout human biological and social evolutive history when new territories were occupied. Paleoparasitology data is a valuable source to recover emergence and disappearance of parasite infections through analysis of archaeological remains. …
Diet And Parasitism At Dust Devil Cave, Karl J. Reinhard, J Richard Ambler, Magdalene Mcguffie
Diet And Parasitism At Dust Devil Cave, Karl J. Reinhard, J Richard Ambler, Magdalene Mcguffie
Karl Reinhard Publications
Human parasitism has obvious relationships to group size and composition, mobility, subsistence patterns, and rates of culture change. At their best, human endoparasites may be annoying; at their worst, some can cause death. Thus, an overall view of the parasite load of a prehistoric population can yield insights useful in interpreting past lifeways. With these thoughts in mind, we undertook a study of Desha Complex (6800-4800 B .C.) human feces recovered from Dust Devil Cave in southern Utah.
Captive Breeding Protocols And Their Impact On Genetic Diversity In White-Footed Mice (Peromyscus Leucopus): Implications For Threatened And Endangered Species, Maureen C. Lamb, Janna R. Willoughby, J. Andrew Dewoody
Captive Breeding Protocols And Their Impact On Genetic Diversity In White-Footed Mice (Peromyscus Leucopus): Implications For Threatened And Endangered Species, Maureen C. Lamb, Janna R. Willoughby, J. Andrew Dewoody
The Summer Undergraduate Research Fellowship (SURF) Symposium
Captive breeding protocols used in zoos often are aimed at increasing population sizes and retaining genetic diversity of endangered species. However, captive breeding causes genetic adaptation to captivity that can lead to an overall decrease in genetic diversity and reduce chances of a successful reintroduction to the wild. In this study, we assess how 3 different breeding protocols—random mating, preferential breeding of individuals with the lowest mean kinship scores, and selection for docility—affect the variability of mitochondrial DNA in white-footed mice (Peromyscus leucopus). We used mice that were captured from the wild but were mated for up to …
Ecology, Behavior And Taxonomy Of Anurans From Brazil's Atlantic Forest, Rodrigio Barbosa Ferreira
Ecology, Behavior And Taxonomy Of Anurans From Brazil's Atlantic Forest, Rodrigio Barbosa Ferreira
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Anura is a diverse group with more than 7382 species described, which represents 88% of the species belonging to the Class Amphibia. Anurans are among the first organisms to be affected by environmental stressors, so when they show decline in the wild, it is a warning to other species, including humans. It is alarming that one-third of the world’s anurans are facing extinction. Following the same trend, a substantive portion of the 988 recognized species of the Atlantic Forest have suffered population declines and local extinctions, attributed primarily to habitat changes.
Despite the unique life history characteristics that make amphibians …
A Dual Function Of White Coloration In A Nocturnal Spider Dolomedes Raptor (Araneae: Pisauridae), Tai-Shen Lin, Shichang Zhang, Chen-Pan Liao, Eileen A. Hebets, I-Min Tso
A Dual Function Of White Coloration In A Nocturnal Spider Dolomedes Raptor (Araneae: Pisauridae), Tai-Shen Lin, Shichang Zhang, Chen-Pan Liao, Eileen A. Hebets, I-Min Tso
Eileen Hebets Publications
Nocturnal animals frequently possess seemingly conspicuous color patterns that can function in a variety of ways (e.g. prey attraction, camouflage, predator avoidance, etc.). The use of color patterns in intraspecific signaling, especially reproductive activities, in nocturnal animals has received relatively little attention. This study tested for a dual function of color in the nocturnal fishing spider, Dolomedes raptor (Araneae: Pisauridae), whose males develop dimorphic white stripes at sexual maturation. We tested for a role in foraging as well as mate assessment. First, quantifications of the natural variation of male stripes indicated a correlation between stripe area and male body size …
Dietary Strategies For Mitigation Of Methane Production By Growing And Finishing Cattle, Anna C. Pesta
Dietary Strategies For Mitigation Of Methane Production By Growing And Finishing Cattle, Anna C. Pesta
Department of Animal Science: Dissertations, Theses, and Student Research
Interest in reducing methane (CH4) emissions by cattle has increased recently. Loss of feed energy as CH4 represents both an environmental concern and an energetic loss to the animal. Manipulation of dietary composition has proven to be an effective mitigation strategy. Experiments were conducted to evaluate the effect of several dietary characteristics on CH4 production in growing and finishing cattle, and to develop a novel, non-invasive method for quantifying emissions from animals in a production setting. Short-term gaseous emissions of CH4 and carbon dioxide (CO2) were measured and the CH4:CO2 …
The Effect Of Isolation By Waterfalls And Dams On Stream Fish Morphology, Kayla M. Knoll
The Effect Of Isolation By Waterfalls And Dams On Stream Fish Morphology, Kayla M. Knoll
All NMU Master's Theses
Large dams with upstream reservoirs can cause divergent selection in fish morphology; however, the effect of isolation from small dams without upstream reservoirs is largely unknown. This study investigated the effects of isolation on stream fish body morphology and the related effect of isolation time on morphological divergence by comparing fish associated with older barriers (waterfalls) to very new barriers (dams). These effects were investigated in five species from the southern Lake Superior basin. Geometric morphometric techniques were used to quantify differences in fish body shape based on species-specific landmarks. Significant intraspecific differences between stream populations and between above-barrier and …
An Investigation Of The Effect Of Malathion On Adaptive Plasticity Of Pseudacris Sierra, Michael Jonathan Maples
An Investigation Of The Effect Of Malathion On Adaptive Plasticity Of Pseudacris Sierra, Michael Jonathan Maples
Master's Theses
This thesis is composed of two chapters. Chapter one reviews what is known about adaptive plasticity in response to predators, describes the physiological systems involved in such plasticity, and outlines the evolutionary consequences of adaptive plasticity. Chapter two describes a scientific experiment that investigates how malathion may impact adaptive plasticity in the Sierran Treefrog, Pseudacris sierra. Anuran tadpoles suffer high mortality rates due to predation. In response to strong selective forces relating to these high predation rates, tadpoles evolved the ability to adaptively respond to predators through morphological and behavioral plasticity. The morphological and behavioral responses are varied and depend …