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Articles 961 - 990 of 3866
Full-Text Articles in Animal Sciences
First Experience With A Camera Collar In A Free-Ranging Przewalski’S Horse Group In The Mongolian Gobi, Petra Kaczensky, Gankhuyag Gantulga, Davaa Lkhagvasuren, Bazartseren Boldgiv, Oyunsaikhan Ganbaatar, Nanjid Altansukh, Chris Walzer
First Experience With A Camera Collar In A Free-Ranging Przewalski’S Horse Group In The Mongolian Gobi, Petra Kaczensky, Gankhuyag Gantulga, Davaa Lkhagvasuren, Bazartseren Boldgiv, Oyunsaikhan Ganbaatar, Nanjid Altansukh, Chris Walzer
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
Remote sensing and satellite telemetry have allowed to greatly expanding the understanding of how species use various landscapes, even in remote settings. However, remotely collecting data also harbors the risk of losing “touch with the ground.” We explore the possibility of the additional insight cameras integrated in GPS-satellite collars can provide for the behavior and ecology of free-ranging Przewalski’s horse in the remote Great Gobi B Strictly Protected Area in southeastern Mongolia. Over a 91-day period, the camera collected 1,080 images. 62% of the images showed Przewalski’s horses and provided insights into behavior and grouping patterns and can supplement indirect …
Beitrag Zur Säugetierfauna Der Ostmongolei, Davaa Lchagvasuren, Annegret Stubbe, Michael Stubbe, Hermann Ansorge, Dietrich Dolch
Beitrag Zur Säugetierfauna Der Ostmongolei, Davaa Lchagvasuren, Annegret Stubbe, Michael Stubbe, Hermann Ansorge, Dietrich Dolch
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
Between 2008 and 2014, four Mongolian-German Biological Expeditions worked for short periods in East Mongolia. The results related to mammalian fauna were summarized. Investigation areas were parts of the Daurian steppe, Buir-nuur- and Nömrög-gol-region. Chiroptera were recorded with four species. Especially, Vespertilio sinensis has to be considered as a characteristic species of the eastern steppes. Aggregations of some thousand individuals were found in the Buir-nuur-region. The other three species were Plecotus ognevi, Myotis petax, and Myotis aurascens. It is to expect, that in eastern Mongolia some more Chiroptera-species will re-covered in future.
The degree of investigation of …
Professor Anudarijn Dašdorž (1918-1977): Eine Würdigung Zur Wiederkehr Seines 100. Geburtstages, Ravčigijn Samjaa, Michael Stubbe, Annegret Stubbe
Professor Anudarijn Dašdorž (1918-1977): Eine Würdigung Zur Wiederkehr Seines 100. Geburtstages, Ravčigijn Samjaa, Michael Stubbe, Annegret Stubbe
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
Der erste Hydrobiologe und Zoologe in der Mongolei, Prof. Dr. Anudarijn Dašdorž (auch engl. Dashdorj) wurde im Jahr 1918 im Somon Bayandun des Dornod Aimaks (Ost Aimak) geboren. Von 1929 bis1931 besuchte er die Grundschule in Bayandun. Um weiter zu lernen, ging er in die Hauptstadt Ulaanbaatar und besuchte in den Jahren 1931-1933 dort die Mittelschule. Ab 1933 studierte Dašdorž zwei Jahre lang am Pädagogischen Technikum in Ulaanbaatar. Im Jahr 1935 absolvierte er diese Ausbildung als Lehrer für die Naturwissenschaften. Danach begann Dašdorž seine Lehrtätigkeit im Bildungswesen. In den Jahren 1935-1939 arbeitete er als Lehrer und Schuldirektor in seinem Heimatort …
Zur Säugetierfauna Des Nationalparks Tavan Bogd (Westmongolei), Annegret Stubbe, Michael Stubbe, Davaa Lchagvasuren
Zur Säugetierfauna Des Nationalparks Tavan Bogd (Westmongolei), Annegret Stubbe, Michael Stubbe, Davaa Lchagvasuren
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
The Mongolian-German Biological Expedition worked in 2014 from 31.07 until 05.08. in the West- Mongolian National Park Tavan Bogd with the lakes Choton-nuur, Churgan-nuur and Dajan-nuur. Within this very short time were recorded the Insectivora Sorex caecutiens and Sorex tundrensis. In addition, the Chiroptera Plecotus ognevi and Myotis petax were collected. A nursery roost of Myotis petax in a tree cave (Larix sibirica) was analyzed. From the genus Clethrionomys the species C. rutilus and C. rufocanus were caught. Two Microtus species, M. gregalis and M. oeconomus were collected. The reproductive state of all caught animals was determined. …
Beitrag Zur Avifauna Der Transaltaigobi/Mongolei Im Herbst 2017, Michael Stubbe, Annegret Stubbe, Ravčigijn Samjaa
Beitrag Zur Avifauna Der Transaltaigobi/Mongolei Im Herbst 2017, Michael Stubbe, Annegret Stubbe, Ravčigijn Samjaa
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
Migration data for Mongolian bird species are relative rare in the literature. Here are summarized observations of a travel in the Transaltaigobi 25.09.–12.10.2017. There are data for 56 species, 26 Nonpasseriformes and 30 Passeriformes. Main visited localities were for few days the oasis Echijn-gol and the mountain areas of Cagaan Bogd and Tost-uul. For some species are given the latest autumn observations.
Soricidenfunde (Mammalia: Insectivora) In Der Mongolei, Michael Stubbe, Davaa Lchagvasuren, Hermann Ansorge, Ravčigijn Samjaa, Dietrich Dolch, Nayamsuren Batsajchan, Margit Hanelt, Annegret Stubbe
Soricidenfunde (Mammalia: Insectivora) In Der Mongolei, Michael Stubbe, Davaa Lchagvasuren, Hermann Ansorge, Ravčigijn Samjaa, Dietrich Dolch, Nayamsuren Batsajchan, Margit Hanelt, Annegret Stubbe
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
New data on the Mongolian fauna of Soricidae came in the last decades from Russian scientists, such as Ju. G. Švecov, N. I. Litvinov, and B. I. Sheftel, last not least, in cooperation with Mongolian mammalogists. We remind the reader about the publications of N. Chotochu, D. Bazardorž, and R. Samjaa with his team. Also in future, there is a lot to do for understanding the biology, ecology, and distribution of the Mongolian shrews. We have summarized the most important publications on shrews and made a grid mapping together with the results of the Mongolian-German Biological Expeditions. Up to now, …
Centipedes And Millipedes (Chilopoda, Diplopoda) Of The Khentey Mountain Range, Northern Mongolia, Ansgar Poloczek, Martin Pfeiffer, Pavel S. Nefediev
Centipedes And Millipedes (Chilopoda, Diplopoda) Of The Khentey Mountain Range, Northern Mongolia, Ansgar Poloczek, Martin Pfeiffer, Pavel S. Nefediev
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
We sampled 99 plots in three locations in the West, South and East Khentey, each consisted of both pitfall traps and soil and litter sampling. We were able to establish the occurrence of ten species of Chilopoda from three genera, three families and three orders and three species of Diplopoda also from three genera, three families and three orders in the Khentey Mountain region. Among the Chilopoda were found eight Lithobiomorpha: Lithobius (Ezembius) giganteus, L. (E.) sibiricus, L. (E.) ostiacorum, L. (E.) rapax, L. …
In Memoriam Prof. H.C. Dr. Mathias Kiefer † (1943 – 2019), Michael Stubbe, Annegret Stubbe
In Memoriam Prof. H.C. Dr. Mathias Kiefer † (1943 – 2019), Michael Stubbe, Annegret Stubbe
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
Am 15.06.2019 vollendete sich nach langer schwerer Krankheit der Lebenszyklus von Mathias Kiefer. Seiner Frau und seinem Sohn Daniel sind wir für wertvolle Daten aus der Vita des Verstorbenen zu großem Dank verbunden. Mathias Kiefer wurde am 25. März 1943 im slowakischen Kežmarok geboren, wo er auch seine Schulausbildung erhielt. Von 1961 bis 1966 erfolgte an der Naturwissenschaftlichen Fakultät der Comenius-Universität von Bratislava sein Biologiestudium, das er mit dem Diplom (Fachrichtung Parasitologie) abschloss.
Peter Hanelt: Ein Großer Wissenschaftler Und Mensch Ist Von Uns Gegangen, Ingo Schubert, Klaus Pistrick
Peter Hanelt: Ein Großer Wissenschaftler Und Mensch Ist Von Uns Gegangen, Ingo Schubert, Klaus Pistrick
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
Am 21. Oktober 2019 vollendete sich nach längerer Krankheit das Leben von Dr. habil. Peter Hanelt. Peter Hanelt wurde am 5. Dezember 1930 im niederschlesischen Görlitz als einziges Kind des Kaufmanns Fritz Hanelt und seiner Ehefrau Margarete geboren. Früh wurde Peter in die Unternehmungen der Eltern im Kanusportverband und im Wanderverein einbezogen, die bald seine Begeisterung weckten. Der Vater nahm ihn schon als Schüler mit zu Vorträgen in das Görlitzer Naturkundemuseum. Auf Exkursionen in die Umgebung von Görlitz beeindruckten ihn am Löbauer Wasser die Süßwasserschwämme und in den Königshainer Bergen der nächtliche Gesang des Ziegenmelkers. So entstand früh eine lebenslange …
Die Türkentaube Streptopelia Decaocto In Der Mongolei, Michael Stubbe, Annegret Stubbe, Davaa Lchagvasuren, Nayamsuren Batsaikhan, Sundev Gombobaatar
Die Türkentaube Streptopelia Decaocto In Der Mongolei, Michael Stubbe, Annegret Stubbe, Davaa Lchagvasuren, Nayamsuren Batsaikhan, Sundev Gombobaatar
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
The first record of Streptopelia decaocto in Mongolia was noticed 1988 in the Dzungarian Gobi, Somon Bulgan, by the Mongolian-German Biological Expedition. In the last 30 years, this bird species has settled nearly all suitable habitats, so parks in the cities and Somon centres, river valleys and in the arid zone, the sajrs with elm trees or poplars as well as in some oases.
Dem Ornithologen und Schüler von Erwin Stresemann Eugeniusz Nowak in Würdigung seiner großen Verdienste in der Erforschung der Migration der Türkentaube mit herzlichen Glückwünschen zum 88. Geburtstag am 08. Juni 2021 gewidmet.
Diversity Of Moths (Lepidoptera: Heterocera) In North-Central Mongolia, Khishigdelger Enkhtur, Martin Pfeiffer, Uuganbayar Munkhbat, Bazartseren Boldgiv
Diversity Of Moths (Lepidoptera: Heterocera) In North-Central Mongolia, Khishigdelger Enkhtur, Martin Pfeiffer, Uuganbayar Munkhbat, Bazartseren Boldgiv
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
In this study, was aimed at 1) collecting baseline data in order to study distribution of moths in the future, and 2) estimating diversity of moths distributed in central and northern Mongolia. For this study were collected specimens from 266 species, representing 15 families from 7 study sites during 92 nights spanning over two years. Samples were collected around the research stations Tunkhel and Khonin Nuga in Selenge Aimag, Ikhtamir in Arkhangai Aimag, Mungunmorit and Undurshireet Soums in Tuv Aimag, as well from Shargamorit near Ulaanbaatar, the capital of Mongolia, and from Tsenkhermandal Soum in Khentii Aimag. So were found …
The Corvonirmus Group (Insecta, Psocodea, Phthiraptera, Ischnocera) Of Corvids (Aves, Corvidae). I. Stubbenirmus Gen. Nov., Eberhard Mey
The Corvonirmus Group (Insecta, Psocodea, Phthiraptera, Ischnocera) Of Corvids (Aves, Corvidae). I. Stubbenirmus Gen. Nov., Eberhard Mey
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
1. The genera Corvonirmus Eichler, 1944 (with 11 spp.), Hecatrishula Gustafsson & Bush, 2017 (with 8 spp.), and Lycocoranirmus Mey, 2017 (with 5 spp.), which belong to the Brueelia complex (Philopteridae s. l.), are morpho-structurally characterized mainly by head structures and chaetotaxy. They are defined as a group of related taxa that should be placed in the rank of a subfamily (Corvonirminae subfam. nov.) if the former Brueeliinae sensu EICHLER (1963:177) would get the status of a separate family (Brueeliidae).
2. Within the Corvonirmus group, the former Hecatrishula biguttata species group is assumed to be classified as new …
The First Detection Of Ceratophyllus Fleas And An Ischnocera Louse On The Great Cormorant Phalacrocorax Carbo In Mongolia, Daniel Kiefer, Michael Stubbe, Annegret Stubbe, Volker Neumann, Sundev Gombobaatar, Davaa Lchagvasuren, Mathias Kiefer
The First Detection Of Ceratophyllus Fleas And An Ischnocera Louse On The Great Cormorant Phalacrocorax Carbo In Mongolia, Daniel Kiefer, Michael Stubbe, Annegret Stubbe, Volker Neumann, Sundev Gombobaatar, Davaa Lchagvasuren, Mathias Kiefer
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
There are summarized data on ectoparasites of Mongolian birds. The Mongolian-German Biological Expeditions found first records for the flea Ceratophyllus vagabundus and the Ischnocera louse Pectinopygus gyricornis at the host Phalacrocorax carbo.
Effects Of Salt Runoff On Aquatic Macroinvertebrate Colonies, Kendra Fink
Effects Of Salt Runoff On Aquatic Macroinvertebrate Colonies, Kendra Fink
Journal of Earth and Life Science
Aquatic macroinvertebrates bridge the gap in part between primary and secondary consumers, making them ecologically important for most aquatic systems. They are used as biotic indicators for water quality due to their sensitivity to pollutants and may be affected, specifically, by chloride ion concentrations in the water. Water quality can be evaluated by looking at species compositions and their respective tolerance values. To determine long-term effects of road salt on macroinvertebrate colonies, a total of 338 identified macroinvertebrates of 10 families (two generalized to class) at 9 sites were collected from before, after, and between three bridges on Turtle River …
A Mathematical Model For Predicting Animal Population Persistence On Fragmented Landscapes, Allyson Jones
A Mathematical Model For Predicting Animal Population Persistence On Fragmented Landscapes, Allyson Jones
Electronic Theses and Dissertations, 2020-2023
The effects of roads, buildings, and cities on animal populations are widespread and, often times, disastrous. These structures fragment animals' homes, inhibiting their ability to obtain essential resources and to reproduce. The question arises then: Under what circumstances can an animal population persist in a fragmented landscape? To attempt to answer this question, we present a spatially explicit reaction-diffusion model with varying growth and diffusion rates that incorporates animal behavior at points where habitats are fragmented for four different habitats. The outcome of extinction or persistence of the animal population is determined by examining the effects of changing parameters on …
Modelling Climatic And Temporal Influences On Boating Traffic With Relevance To Digital Camera Monitoring Of Recreational Fisheries, Ebenezer Afrifa-Yamoah, Stephen M. Taylor, Ute A. Mueller
Modelling Climatic And Temporal Influences On Boating Traffic With Relevance To Digital Camera Monitoring Of Recreational Fisheries, Ebenezer Afrifa-Yamoah, Stephen M. Taylor, Ute A. Mueller
Research outputs 2014 to 2021
Digital camera monitoring data on recreational boating traffic are often manually interpreted and the reading cost can be expensive. Typically, these data are used along with other periodic survey information and camera data between these surveys may not be read, creating gaps in the time series. We predicted recreational boating traffic during these ‘gap’ periods using historical camera data and covariates to complete the time series data. Predictive models were built in a Bayesian regression modelling framework to determine the daily distribution of recreational boating traffic at two ramps in Western Australia based on climatic variables (temperature, humidity, wind speed, …
Effects Of Predator Management And Parasitism On Over-Water Nesting Diving Duck Production In Southwestern Manitoba, Trenton E. Rohrer
Effects Of Predator Management And Parasitism On Over-Water Nesting Diving Duck Production In Southwestern Manitoba, Trenton E. Rohrer
Electronic Theses and Dissertations
Nest survival of upland nesting waterfowl (e.g., mallard [Anas platyrhynchos], blue-winged teal [Anas discors]) has been studied extensively in the Prairie Pothole Region (PPR) of North America. Conversely, over-water nesting diving ducks’ nest survival is poorly understood, likely because over-water nests are more challenging to find, may be less concentrated, and searching for these nests is physically demanding. Nest depredation is considered a leading cause of duck nest failure and is considered a limiting factor on upland nesting waterfowl production in the PPR. Similar factors limiting upland nesting duck production may limit over-water nesting duck productivity, but studies of this …
Impacts Of Extreme Environmental Disturbances On Piping Plover Survival Are Partially Moderated By Migratory Connectivity, Kristen S. Ellis, Michael J. Anteau, Francesca J. Cuthbert, Cheri L. Gratto-Trevor, Joel G. Jorgensen, David J. Newstead, Larkin Powell, Megan M. Ring, Mark H. Sherfy, Rose J. Swift, Dustin L. Toy, David N. Koons
Impacts Of Extreme Environmental Disturbances On Piping Plover Survival Are Partially Moderated By Migratory Connectivity, Kristen S. Ellis, Michael J. Anteau, Francesca J. Cuthbert, Cheri L. Gratto-Trevor, Joel G. Jorgensen, David J. Newstead, Larkin Powell, Megan M. Ring, Mark H. Sherfy, Rose J. Swift, Dustin L. Toy, David N. Koons
Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications
Effective conservation for listed migratory species requires an understanding of how drivers of population decline vary spatially and temporally, as well as knowledge of range-wide connectivity between breeding and nonbreeding areas. Environmental conditions distant from breeding areas can have lasting effects on the demography of migratory species, yet these consequences are often the least understood. Our objectives were to 1) evaluate associations between survival and extreme environmental disturbances at nonbreeding areas, including hurricanes, harmful algal blooms, and oil spills, and 2) estimate migratory connectivity between breeding and nonbreeding areas of midcontinental piping plovers (Charadrius melodus). We used capture …
Environmental Controls On The Spatial Distribution Of Greenfin Darters And Biodiversity In The Blue Ridge Mountains, Dri Tattersfield
Environmental Controls On The Spatial Distribution Of Greenfin Darters And Biodiversity In The Blue Ridge Mountains, Dri Tattersfield
CMC Senior Theses
Disproportionate concentrations of biodiversity in mountains worldwide suggest linkages between geologic processes and biodiversity that are not yet well understood. The Tennessee River Basin in the Blue Ridge Mountains of the southeastern U.S. is a global hotspot for freshwater fish biodiversity. To investigate drivers of biodiversity in the Tennessee River Basin, and explore links to geologic processes, I study the Greenfin Darter (Nothonotus chlorobranchius), a small fish endemic to the upper Tennessee River Basin. I use generalized linear models (GLMs) to evaluate the influence of topography, lithology, climate and land use on the distribution of the Greenfin Darter, …
Red Drum And Spotted Seatrout Live-Release Tournament Mortality And Dispersal, T. Reid Nelson, Crystal Hightower, Sean P. Powers
Red Drum And Spotted Seatrout Live-Release Tournament Mortality And Dispersal, T. Reid Nelson, Crystal Hightower, Sean P. Powers
University Faculty and Staff Publications
Although catch-and-release fishing tournaments undoubtedly reduce mortality of target species, postrelease mortality and fish stockpiling at release sites remain common concerns related to these tournaments. The impacts of liverelease tournaments on freshwater species have been widely studied. However, research on estuarine sport fishes is lacking even though catch-and-release tournaments targeting these species are prevalent and popular recreational fisheries exist. Therefore, we estimated the post-weigh-in mortality and dispersal of Red Drum Sciaenops ocellatus and Spotted Seatrout Cynoscion nebulosus released from the 2016–2018 Alabama Deep Sea Fishing Rodeo live-weigh-in categories using acoustic telemetry. To concurrently estimate overall post-weigh-in mortality and dispersal, we …
Global Connectivity Of Southern Ocean Ecosystems, Eugene J. Murphy, Nadine M. Johnston, Eileen E. Hofmann, Richard A. Phillips, Jennifer A. Jackson, Andrew J. Constable, Sian F. Henley, Jessica Melbourne-Thomas, Rowan Trebilco, Rachel D. Cavanagh, Geraint A. Tarling, Ryan A. Saunders, David K.A. Barnes, Daniel P. Costa, Stuart P. Corney, Ceridwen I. Fraser, Juan Höfer, Kevin A. Hughes, Chester J. Sands, Sally E. Thorpe, Philip N. Trathan, José C. Xavier
Global Connectivity Of Southern Ocean Ecosystems, Eugene J. Murphy, Nadine M. Johnston, Eileen E. Hofmann, Richard A. Phillips, Jennifer A. Jackson, Andrew J. Constable, Sian F. Henley, Jessica Melbourne-Thomas, Rowan Trebilco, Rachel D. Cavanagh, Geraint A. Tarling, Ryan A. Saunders, David K.A. Barnes, Daniel P. Costa, Stuart P. Corney, Ceridwen I. Fraser, Juan Höfer, Kevin A. Hughes, Chester J. Sands, Sally E. Thorpe, Philip N. Trathan, José C. Xavier
CCPO Publications
Southern Ocean ecosystems are globally important. Processes in the Antarctic atmosphere, cryosphere, and the Southern Ocean directly influence global atmospheric and oceanic systems. Southern Ocean biogeochemistry has also been shown to have global importance. In contrast, ocean ecological processes are often seen as largely separate from the rest of the global system. In this paper, we consider the degree of ecological connectivity at different trophic levels, linking Southern Ocean ecosystems with the global ocean, and their importance not only for the regional ecosystem but also the wider Earth system. We also consider the human system connections, including the role of …
Factors Influencing Aquatic Invertebrate Diversity In Mine Pit Lakes Along The Mesabi Iron Range, Jeremy Laurich
Factors Influencing Aquatic Invertebrate Diversity In Mine Pit Lakes Along The Mesabi Iron Range, Jeremy Laurich
Journal of Earth and Life Science
Restoration of mine pit lakes for recreation is going to be very important for the future of Minnesota’s Mesabi Iron Range area. As many as 250 lakes will need to be restored in the future along this 100-kilometer-long swath of mining country. Information regarding the organisms that currently inhabit these lakes is important for future restorations to be a success. The focus of this study was to identify the types of aquatic invertebrates present in pit lakes and to identify some of the factors that influence their abundance and diversity. During this study, invertebrate samples were taken along the shore …
Is There A Relationship Between Aquatic Vegetation And Amphipod Stocking Mortality?, Alaina Taylor
Is There A Relationship Between Aquatic Vegetation And Amphipod Stocking Mortality?, Alaina Taylor
Journal of Earth and Life Science
Amphipod occurrence and abundance has declined in the Prairie Pothole Region (PPR). Wildlife managers have stocked prairie pothole wetlands with Gammarus lacustris since 2018 to establish self-sustaining populations. G. lacustris have been detected in only 2 of 22 stocked basins, suggesting that they have died or failed to reproduce in most stocking attempts. Aquatic plant surveys were conducted in stocked wetlands and compared to data from surveys of wetlands with naturally occurring populations to understand if G. lacustris would be expected to survive in stocked wetlands based on characteristics of the aquatic vegetation communities. SAV coverage was significantly higher in …
Exploring The Genetic Variability Of Zebra Mussels Dreisenna Polymoprha, Maxwell Carr
Exploring The Genetic Variability Of Zebra Mussels Dreisenna Polymoprha, Maxwell Carr
Journal of Earth and Life Science
Zebra Mussels Dreisenna polymorpha are one of the most well-known invasive species here in the United States. This species can take over watersheds very quickly, causing damage to both the ecosystem and man-made structures. The basic physical behavior of this species has been well documented, but the invasive North American Zebra Mussel is much more aggressive and therefore causes more damage in the Great Lakes region compared to its native waters. Genetic variation may be playing a very large role in how and why D. polymorpha is causing such large problems for stakeholders in the United States. This review cites …
Effectiveness Of Endothall Treatment In Reducing Potamogeton Crispus In Lake Julia, Jake Sorensen
Effectiveness Of Endothall Treatment In Reducing Potamogeton Crispus In Lake Julia, Jake Sorensen
Journal of Earth and Life Science
Curly leaf pondweed Potamogeton crispus, is a submerged aquatic plant non-native to North America. It was most likely introduced when common carp Cyprinus carpio were intentionally brought to the Midwest. Endothall is an aquatic herbicide commonly used to control curlyleaf pondweed in lakes. This study focused on collecting data from Lake Julia in Sherburne County, MN. Lake Julia is treated annually in the spring to control curlyleaf pondweed. The results show treatment areas saw a significant increase in vegetation density compared to control areas (P < 0.01). Changes in percent vegetation coverage by date were insignificant (P = 0.24). No significant signs of fish kills were observed. Because this study looked at overall vegetation coverage instead of specifically curlyleaf pondweed, we cannot conclude the increase in vegetation coverage was from curlyleaf pondweed alone. Based on the results from Poovey et al. (2002) we would expect lower vegetation coverage in treatment areas instead of the increased vegetation coverage observed in our study. This suggests the possibility that the endothall treatment successfully killed curlyleaf pondweed in treated areas, which allowed for new growth of submerged aquatic plants to take place as water temperatures increased.
An Examination Of Limiting Factors Of Chrysemys Picta Bellii (Western Painted Turtles) In The Lower Willamette River Basin, Oregon, James P. Holley
An Examination Of Limiting Factors Of Chrysemys Picta Bellii (Western Painted Turtles) In The Lower Willamette River Basin, Oregon, James P. Holley
Environmental Science and Management Professional Master's Project Reports
Oregon’s two native freshwater turtle species, Chrysemys picta bellii (Western painted turtle) and Actinemys marmorata (Northwestern pond turtle), have seen significantly reduced population sizes since the founding of Portland in 1845, with estimates of up to 90% for A. marmorata. This project examined turtle nesting activity at 25 sites across a range of turtle populations and habitats around the Lower Willamette River Basin. All discovered turtle nesting activity was found in areas of high solar exposure. We found 93% of over 400 nest attempts to have been depredated across the 25 sites, well above most other reported rates. At …
Changes In The Philippine Coastal Environment, Karl H. Szekielda, Ma. Aileen Leah G. Guzman
Changes In The Philippine Coastal Environment, Karl H. Szekielda, Ma. Aileen Leah G. Guzman
Environmental Science Faculty Publications
Global warming is progressing at a faster speed than has been estimated earlier in climate forecasting, and the ocean responds rather quickly to global temperature increase. This study uses remotely sensed data that were accessed from the System for Multidisciplinary Research and Applications (NASA Giovanni) to study environmental change in the Philippines’ coast. Monthly averaged sea surface temperature series from around the Philippines indicate that the Philippines follow the global trend in ocean temperature increase and show the increase of about 0.50C within two decades. Despite the high variability in temperature, the linear regressions displayed for all seasons show an …
Effects Of Harvest Regulations And Post-Release Hooking Mortality On Walleye Populations In South Dakota, Cade Lyon
Electronic Theses and Dissertations
Harvest regulations are commonly implemented to manipulate fisheries stocks. By regulating the size and number of fish that are harvested by anglers, managers are able to meet the goals and needs of regions. However, these management actions come with the potential for negative consequences. Overexploitation due to less restrictive harvest regulations can cause collapses in fisheries populations. In addition, indirect consequences such as hooking mortality brought on by length-based regulations can also be detrimental to populations. In this study, I investigated the effects of various harvest regulations on Walleye populations in three western South Dakota irrigation reservoirs: Angostura, Belle Fourche, …
Predicting Carcass Cut Yields In Cattle From Digitalimages Using Artificial Intelligence, Darragh Matthews
Predicting Carcass Cut Yields In Cattle From Digitalimages Using Artificial Intelligence, Darragh Matthews
Theses
Beef carcass classification in Europe is predicated on the EUROP grid for both fatness and conformation. Although this system performs well for grouping visually similar carcasses, it cannot be used to accurately predict meat yields from these groups, especially when considered on an individual cut level. Deep Learning (DL) has proven to be a successful tool for many image classification problems but has yet to be fully proven in a regression scenario using carcass images. Here we have trained DL models to predict carcass cut yields and compared predictions to more standard machine learning (ML) methods. Three approaches were undertaken …
Soil Response Of Helicopter Liming In The Monongahela National Forest, Jarrett Douglas Fowler
Soil Response Of Helicopter Liming In The Monongahela National Forest, Jarrett Douglas Fowler
Graduate Theses, Dissertations, and Problem Reports (ETD)
Soils in the Monongahela National Forest (MNF) are acidic due to sandstone parent material, acid deposition, uptake of base cations by vegetation, and release of organic acids by organic matter (OM) decomposition. Increases in soil acidity have caused declines in forest health and changed species composition and nutrient status. Liming can neutralize soil acidity, but no large-scale liming projects have been done on acid forest soils in the USA. In anticipation of acquiring funding for a proposed liming project in the MNF, in 2007 and 2009 10 sites were selected to sample and analyze soils before lime was applied. In …