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Articles 11311 - 11340 of 36496

Full-Text Articles in Animal Sciences

Across The Indian Ocean: A Remarkable Example Of Trans-Oceanic Dispersal In An Austral Mygalomorph Spider, Sophie E. Harrison, Mark S. Harvey, Steven J.B. Cooper, Andrew D. Austin, Michael G. Rix Jan 2018

Across The Indian Ocean: A Remarkable Example Of Trans-Oceanic Dispersal In An Austral Mygalomorph Spider, Sophie E. Harrison, Mark S. Harvey, Steven J.B. Cooper, Andrew D. Austin, Michael G. Rix

Research Datasets

The Migidae are a family of austral trapdoor spiders known to show a highly restricted and disjunct distribution pattern. Here, we aim to investigate the phylogeny and historical biogeography of the group, which was previously thought to be vicariant in origin, and examine the biogeographic origins of the genus Moggridgea using a dated multi-gene phylogeny. Moggridgea specimens were sampled from southern Australia and Africa, and Bertmainus was sampled from Western Australia. Sanger sequencing methods were used to generate a robust six marker molecular dataset consisting of the nuclear genes 18S rRNA, 28S rRNA, ITS rRNA, XPNPEP3 and H3 and the …


Ecological Implications Of Foraging And Life-History In Three Cold-Adapted Species, Andrew Von Duyke Jan 2018

Ecological Implications Of Foraging And Life-History In Three Cold-Adapted Species, Andrew Von Duyke

Dissertations, Master's Theses and Master's Reports

This research investigates the ecology of: ringed seals (Pusa hispida), moose (Alces alces), and bowhead whales (Balaena mysticetus). Each of these species draws upon specialized strategies to meet the physical demands of life in their extreme environments. However, they are currently experiencing unprecedented changes in their habitats. This work adds to what is known about the behavior, physiology, and population dynamics of cold-adapted species—providing insights of value for an improved understanding of foraging and life-history theory, and informing conservation and ecosystem monitoring efforts. Chapter 1 provides a brief introduction to the scope of work …


The National Wildlife Strike Database: A Scientific Foundation To Enhance Aviation Safety, Richard A. Dolbeer, Michael J. Begier, John R. Weller Jan 2018

The National Wildlife Strike Database: A Scientific Foundation To Enhance Aviation Safety, Richard A. Dolbeer, Michael J. Begier, John R. Weller

United States Department of Agriculture Wildlife Services: Staff Publications

The U.S. Federal Aviation Administration's (FAA) National Wildlife Strike Database (NWSD) documents reports of civil aircraft collisions with wildlife in USA. The NWSD has been managed by the Wildlife Services Program of the U.S. Department of Agriculture through an interagency agreement since its inception. Although the NWSD includes about 170,000 reports of civil aircraft collisions with wildlife (97% birds) from 1990-2015 (14,000 in 2015), the overriding focus has been the quality control of data entered for over 90 variables ranging from species and numbers of wildlife struck, location and time of day, phase and height of flight, aircraft type, components …


To Live And Fly In La: Using Bird Strike And Management Program Information To Improve Safety At Airports In The Los Angeles Basin, Todd J. Pitlik, Elizabeth Hermann, Eric Peralta, Brian E. Washburn Jan 2018

To Live And Fly In La: Using Bird Strike And Management Program Information To Improve Safety At Airports In The Los Angeles Basin, Todd J. Pitlik, Elizabeth Hermann, Eric Peralta, Brian E. Washburn

United States Department of Agriculture Wildlife Services: Staff Publications

Wildlife-aircraft collisions (wildlife strikes) pose a serious safety risk to aircraft. Wildlife strikes can be evaluated at different levels, include efforts to examine these problems at the national, regional, or state level, or for an individual airport. Similarly, wildlife strikes involving individual wildlife species or guilds can be examined at varying scales. Although wildlife strike analyses at the national, regional, or species/guild level are valuable, airport-specific analyses are essential for the effective implementation and evaluation of integrated wildlife damage management programs as these actions are conducted at the airport level. The species that present hazards to safe aircraft operations varies …


Chesapeake Bay Nutria Eradication Project: 2017 Update, Margaret Pepper, Kevin Sullivan, Robert Colona, Jonathan Mcknight Jan 2018

Chesapeake Bay Nutria Eradication Project: 2017 Update, Margaret Pepper, Kevin Sullivan, Robert Colona, Jonathan Mcknight

United States Department of Agriculture Wildlife Services: Staff Publications

Nutria, a semi-aquatic, South American rodent, was introduced to Maryland during the early 1940s. Originally brought to the area for fur farms, the market never established and animals were released or escaped. Nutria thrived, destroying coastal wetlands which resulted in negative environmental and economic impacts to the Chesapeake Bay region. To preserve and protect valuable wetland resources, the Chesapeake Bay Nutria Eradication Project (CBNEP) was established in 2002 through a partnership between the United States Fish and Wildlife Service, the United States Department of Agriculture’s Wildlife Services, Maryland Department of Natural Resources, and many state agencies and non-governmental organizations. Since …


Anticoagulant Rodenticide Residues In Game Animals In California, Stella C. Mcmillin, Robert H. Poppenga, Shannon C. Chandler, Deana L. Clifford Jan 2018

Anticoagulant Rodenticide Residues In Game Animals In California, Stella C. Mcmillin, Robert H. Poppenga, Shannon C. Chandler, Deana L. Clifford

United States Department of Agriculture Wildlife Services: Staff Publications

Anticoagulant rodenticides (ARs) are used to control rodents around homes, buildings, and in agriculture. They have been found widely in predatory and scavenging wildlife as a result of secondary exposure and less commonly in herbivores and omnivores from primary exposure. While predators and scavengers have been monitored for AR exposure, very little information is available about AR residues in edible muscle tissue of game animals. Game animals may be exposed to ARs through direct consumption of bait, ingestion of contaminated food or vegetation, or consumption of contaminated prey items. Carcasses of three species of game animals (black bear, wild pigs, …


An Engineer Cantonment Bestiary: The Art Of Titian Ramsay Peale, Hugh H. Genoways, Thomas E. Labedz Jan 2018

An Engineer Cantonment Bestiary: The Art Of Titian Ramsay Peale, Hugh H. Genoways, Thomas E. Labedz

University of Nebraska State Museum: Mammalogy Papers

Includes an overview of the work of American nature artist Titian Ramsay Peale as part of the Stephen H. Long Expedition, 1819-1820, at Engineer Cantonment in eastern Nebraska, USA.

Includes textual descriptions and/or reproductions of watercolors and lined drawings by Peale of banded killifish (Fundulus diaphanous), American White Pelican (Pelecanus erythrothynchos), Wood Duck (Aix sponsa), Rough-legged Hawk (Buteo lagopus/Falco lagopus), Sandhill Crane (Grus canadensis tabida), Pectoral Sandpiper (Calidris melanotos), Scarlet Tanager (Piranga olivacea), American Tree Sparrow (Spizella arborea), Yellow-headed Blackbird (Xanthocephalus …


Vocalizations Influence Roost-Site Selection In Overwintering Cavity-Nesting Birds In Eastern Washington, Shelby M. Hunter Jan 2018

Vocalizations Influence Roost-Site Selection In Overwintering Cavity-Nesting Birds In Eastern Washington, Shelby M. Hunter

EWU Masters Thesis Collection

Primary cavity-nesting birds are keystone species because the annual tree cavities they excavate become critical habitat for other species. In eastern Washington, most primary cavity-nesting birds are year-round residents. They increase overwinter survival by night roosting in cavities and forming flocks. The timing of roost site selection can impact the quality of a roost site, thus selecting a roost site too late reduces the odds of selecting the most favorable microclimate available. Birds in flocks use alarm calls to warn of threats and contact calls to promote group cohesion. My study asks if timing of roost site selection and vocalizations …


Evaluating Behavioral Responses Of Nesting Lesser Snow Geese To Unmanned Aircraft Surveys, Andrew Barnas, Robert Newman, Christopher J. Felege, Michael P. Corcoran, Samuel D. Hervey, Tanner J. Stechmann, Robert F. Rockwell, Susan N. Ellis-Felege Dec 2017

Evaluating Behavioral Responses Of Nesting Lesser Snow Geese To Unmanned Aircraft Surveys, Andrew Barnas, Robert Newman, Christopher J. Felege, Michael P. Corcoran, Samuel D. Hervey, Tanner J. Stechmann, Robert F. Rockwell, Susan N. Ellis-Felege

Publications and Research

Unmanned aircraft systems (UAS) are relatively new technologies gaining popularity among wildlife biologists. As with any new tool in wildlife science, operating protocols must be developed through rigorous protocol testing. Few studies have been conducted that quantify the impacts UAS may have on unhabituated individuals in the wild using standard aerial survey protocols. We evaluated impacts of unmanned surveys by measuring UAS-induced behavioral responses during the nesting phase of lesser snow geese (Anser caerulescens caerulescens) in Wapusk National Park, Manitoba, Canada. We conducted surveys with a fixed-wing Trimble UX5 and monitored behavioral changes via discreet surveillance cameras at 25 nests. …


Comparative Study Of Spinning Field Development In Two Species Of Araneophagic Spiders (Araneae, Mimetidae, Australomimetus), Mark A. Townley, Danilo Harms Dec 2017

Comparative Study Of Spinning Field Development In Two Species Of Araneophagic Spiders (Araneae, Mimetidae, Australomimetus), Mark A. Townley, Danilo Harms

Molecular, Cellular & Biomedical Sciences

External studies of spider spinning fields allow us to make inferences about internal silk gland biology, including what happens to silk glands when the spider molts. Such studies often focus on adults, but juveniles can provide additional insight on spinning apparatus development and character polarity. Here we document and describe spinning fields at all stadia in two species of pirate spider (Mimetidae: Australomimetus spinosus, A. djuka). Pirate spiders nest within the ecribellate orb-building spiders (Araneoidea), but are vagrant, araneophagic members that do not build prey-capture webs. Correspondingly, they lack aggregate and flagelliform silk glands (AG, FL), specialized for forming prey-capture …


Large Birds Of Prey, Policies That Alter Food Availability And Air Traffic: A Risky Mix For Human Safety, Rubén Moreno-Opo, Antoni Margalida Dec 2017

Large Birds Of Prey, Policies That Alter Food Availability And Air Traffic: A Risky Mix For Human Safety, Rubén Moreno-Opo, Antoni Margalida

Human–Wildlife Interactions

Raptors are considered to pose one of the greatest aviation bird strike risk. We investigated raptor bird strikes reported at the largest Spanish airport (Adolfo Suárez Madrid Barajas; AS-MB) from 2009 to 2016 to determine the factors contributing to the increased incidences and develop recommendations to mitigate the risks. We hypothesized that increased raptor bird strikes resulted from changes in foraging and dispersal patterns of Iberian Peninsula vultures (Aegypius spp. and Gyps spp.) after 2004-2005. We used information on raptor bird strikes obtained from official databases and published studies, reported incidences of raptor bird strikes and their characteristics (i.e., …


Learning To Live With Wolves: Community-Based Conservation In The Blackfoot Valley Of Montana, Seth M. Wilson, Elizabeth H. Bradley, Gregory A. Neudecker Dec 2017

Learning To Live With Wolves: Community-Based Conservation In The Blackfoot Valley Of Montana, Seth M. Wilson, Elizabeth H. Bradley, Gregory A. Neudecker

Human–Wildlife Interactions

We built on the existing capacity of a nongovernmental organization called the Blackfoot Challenge to proactively address wolf (Canis lupus)-livestock conflicts in the Blackfoot Valley of Montana. Beginning in 2007, wolves started rapidly recolonizing the valley, raising concerns among livestock producers. We built on an existing program to mitigate conflicts associated with an expanding grizzly bear population and worked within the community to build a similar program to reduce wolf conflicts using an integrative, multi-method approach. Efforts to engage the community included one-on-one meetings, workshops, field tours, and regular group meetings as well as opportunities to participate in …


Zoo Animal Management Avs 327x, Michael Cerbo Dec 2017

Zoo Animal Management Avs 327x, Michael Cerbo

Library Impact Statements

No abstract provided.


Inhibition Of Growth And Ammonia Production Of Ruminal Hyper Ammonia-Producing Bacteria By Chinook Or Galena Hops After Long-Term Storage, Michael D. Flythe, Brittany E. Harlow, Glen E. Aiken, Gloria L. Gellin, Isabelle A. Kagan, Jesse Pappas Dec 2017

Inhibition Of Growth And Ammonia Production Of Ruminal Hyper Ammonia-Producing Bacteria By Chinook Or Galena Hops After Long-Term Storage, Michael D. Flythe, Brittany E. Harlow, Glen E. Aiken, Gloria L. Gellin, Isabelle A. Kagan, Jesse Pappas

Animal and Food Sciences Faculty Publications

Surplus hops (Humulus lupulus L.) that are not needed by the brewing industry could be used as a feed supplement for cattle and other ruminants. Previous research indicates that antimicrobial hops plant secondary metabolites (i.e., α- and β-acids) inhibit methane and ammonia production and promote the growth of ruminant animals. The goal was to determine that hop pellets produced for brewing still possessed the requisite antimicrobial activity after 5-year storage. HPLC (high performance liquid chromatography) analysis indicated that the α- and β-acid concentrations in two varieties of hops were relatively stable after 5 years of storage under N2 …


Oceanic, Latitudinal, And Sex-Specific Variation In Demography Of A Tropical Deepwater Snapper Across The Indo-Pacific Region, Ashley J. Williams, C. Wakefield, Stephen J. Newman, Elodie Vourey, Francisco J. Abascal, Tuikolongahau Halafihi, Jeremie Kaltavara, Simon J. Nicol Dec 2017

Oceanic, Latitudinal, And Sex-Specific Variation In Demography Of A Tropical Deepwater Snapper Across The Indo-Pacific Region, Ashley J. Williams, C. Wakefield, Stephen J. Newman, Elodie Vourey, Francisco J. Abascal, Tuikolongahau Halafihi, Jeremie Kaltavara, Simon J. Nicol

Fisheries Research Articles

Deepwater tropical fisheries provide an important source of income and protein to Pacific and Indian Ocean coastal communities who are highly dependent on fish for food security. The development of quantitative assessments and management strategies for these deepwater fisheries has been hindered by insufficient biological and fisheries data. We examine the age-specific demography of the pygmy ruby snapper Etelis carbunculus, an important target species in tropical deepwater fisheries, across 90° of longitude and 20° of latitude in the Pacific and Indian Oceans. Our results show that growth of E. carbunculus varies significantly between oceans and sexes and across latitudes …


Integrating Herbivore Population Dynamics Into A Global Land Biosphere Model: Plugging Animals Into The Earth System, Shree R. S. Dangal, Hanqin Tian, Chaoqun Lu, Wei Ren, Shufen Pan, Jia Yang, Nicola Di Cosmo, Amy Hessl Dec 2017

Integrating Herbivore Population Dynamics Into A Global Land Biosphere Model: Plugging Animals Into The Earth System, Shree R. S. Dangal, Hanqin Tian, Chaoqun Lu, Wei Ren, Shufen Pan, Jia Yang, Nicola Di Cosmo, Amy Hessl

Plant and Soil Sciences Faculty Publications

Mammalian herbivores are an essential component of grassland and savanna ecosystems, and with feedbacks to the climate system. To date, the response and feedbacks of mammalian herbivores to changes in both abiotic and biotic factors are poorly quantified and not adequately represented in the current global land surface modeling framework. In this study, we coupled herbivore population dynamics in a global land model (the Dynamic Land Ecosystem Model, DLEM 3.0) to simulate populations of horses, cattle, sheep, and goats, and their responses to changes in multiple environmental factors at the site level across different continents during 1980–2010. Simulated results show …


Small-Animal Models Of Zika Virus, Justin G. Julander, Venkatraman Siddharthan Dec 2017

Small-Animal Models Of Zika Virus, Justin G. Julander, Venkatraman Siddharthan

Animal, Dairy, and Veterinary Science Faculty Publications

Zika virus (ZIKV) infection can result in serious consequences, including severe congenital manifestations, persistent infection in the testes and neurologic sequelae. After a pandemic emergence, the virus has spread to much of the new world and has been introduced to many countries outside of endemic areas as infected travelers return to their home countries. Rodent models have been important in gaining a better understanding of the wide range of disease etiologies associated with ZIKV infection and for the initial phase of developing countermeasures to prevent or treat viral infections. We discuss herein the advantages and disadvantages of small animal models …


Of Rats And Men, Thomas S. Walsh Dec 2017

Of Rats And Men, Thomas S. Walsh

Capstones

This capstone is a data-driven investigation into New York City's rat problem. By using publicly available government data to map rat activity in NYC, I identified several socio-economic variables that correlate with rat populations at the community district, borough, and city-scale. I used these findings (mainly that rat problems are linked to lower incomes) as the basis of an investigation, which includes interviews with residents, experts, and city officials. Prof. Bobby Corrigan, urban rodentologist and formerly with the NYC Department of Health criticizes the city's efforts for the first time on the record.

https://thomasseiyawalsh.wixsite.com/ratstone


Effects Of Carbon Dioxide On Turkey Poult Performance And Behavior, M G.L Candido, Y Xiong, R S. Gates, I F.F. Tinoco, K W. Koelkebeck Dec 2017

Effects Of Carbon Dioxide On Turkey Poult Performance And Behavior, M G.L Candido, Y Xiong, R S. Gates, I F.F. Tinoco, K W. Koelkebeck

Department of Animal Science: Faculty Publications

Appropriate ventilation of poultry facilities is critical for achieving optimum performance. Ventilation promotes good air exchange to remove harmful gases, excessive heat, moisture, and particulate matter. In a turkey brooder barn, carbon dioxide (CO2) may be present at higher levels during the winter due to reduced ventilation rates to maintain high temperatures. This higher CO2 may negatively affect turkey poult performance. Therefore, the objective of this study was to evaluate the effects of subjecting tom turkey poults (commercial Large White Hybrid Converters) to different constant levels of atmospheric CO2 on their growth performance and behavior. In …


Organizational Effects Of Defeminizing Toxicants: Lessons Learned From An Environmental Sentinel Organism, The Fathead Minnow., Jonathan Ali Dec 2017

Organizational Effects Of Defeminizing Toxicants: Lessons Learned From An Environmental Sentinel Organism, The Fathead Minnow., Jonathan Ali

Theses & Dissertations

Endocrine disrupting compounds (EDCs) are chemicals that interfere with hormone function and are increasingly detected in aquatic environments, where they elicit adverse effects from exposed organisms. The toxicological effects of EDCs can be described as either activational (reversible) or organizational (irreversible), where the latter are associated with adverse outcomes in reproductive performance of adult fish. However, few studies have investigated the organizational impacts of anti-estrogenic or “defeminizing” EDCs, e.g. agrichemicals or pharmacological agents, in an environmentally-relevant or “sentinel” species. The objective of this study was to investigate the impacts of early-life EDC-initiated changes in estrogenic gene expression on organizational effects …


Effects Of Crude Oil On Tumor Suppressor P53 Polymorphisms In Laboratory-Exposed Atlantic Killifish, Fundulus Heteroclitus, Allison Margaret Nadler Dec 2017

Effects Of Crude Oil On Tumor Suppressor P53 Polymorphisms In Laboratory-Exposed Atlantic Killifish, Fundulus Heteroclitus, Allison Margaret Nadler

Seton Hall University Dissertations and Theses (ETDs)

Polycyclic aromatic hydrocarbons (PAHs), constituents of crude oil, are implicated as a potent source of adverse toxicological effects on living organisms. To model the effects of PAHs in response to environmental oil spill disasters a species of killifish (Fundulus heteroclitus) was captured and exposed to crude oil in a laboratory-controlled setting. Over a period of 7 days, fish were dosed with crude oil by gavage, culled, and organs were harvested for analysis. Excitation-emission matrix spectroscopy (EEMS) of gall bladder tissue homogenates was used to verify exposure. Effects of PAHs on the p53 gene were evaluated as an indicator …


Four Legs Good, Two Legs Bad: How Slaughterhouse Safety Hasn’T Kept Up With The Times, Emily Ziemski Dec 2017

Four Legs Good, Two Legs Bad: How Slaughterhouse Safety Hasn’T Kept Up With The Times, Emily Ziemski

Capstones

From legal loopholes and outdated rules to undetectable infections and understaffing, the United States Department of Agriculture may not be doing all it can to make sure the American public’s health isn't at risk. As the people of the United States consume over 500 million pounds of beef a year, food safety policy and slaughterhouses are falling behind in proper procedural measurements in the beef industry.

emziemski.com/capstone


Habitat Selection, Survival, And Movement Ecology Of The American Woodcock (Scolopax Minor) In Louisiana Usa, Elisa Constancia Elizondo Dec 2017

Habitat Selection, Survival, And Movement Ecology Of The American Woodcock (Scolopax Minor) In Louisiana Usa, Elisa Constancia Elizondo

LSU Master's Theses

The American Woodcock (Scolopax minor) is a migratory upland game species occurring across much of eastern North America. Across its breeding range in the northern U.S. and southern Canada, this species has experienced significant, pervasive declines over the last half century. As woodcock populations continue to decline, active habitat management for this species has become increasingly important.

The state of Louisiana has substantial amounts of woodcock habitat and receives wintering birds from across the woodcock range. However, few data exist regarding survival rates, habitat utilization, and movement patterns across the state.

In order to better manage for woodcock …


Translating Statistical Species-Habitat Models To Interactive Decision Support Tools, Lyndsie S. Wszola, Victoria L. Simonsen, Erica F. Stuber, Caitlyn R. Gillespie, Lindsey N. Messinger, Karie L. Decker, Jeffrey J. Lusk, Christopher F. Jorgensen, Andrew A. Bishop, Joseph J. Fontaine Dec 2017

Translating Statistical Species-Habitat Models To Interactive Decision Support Tools, Lyndsie S. Wszola, Victoria L. Simonsen, Erica F. Stuber, Caitlyn R. Gillespie, Lindsey N. Messinger, Karie L. Decker, Jeffrey J. Lusk, Christopher F. Jorgensen, Andrew A. Bishop, Joseph J. Fontaine

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Understanding species-habitat relationships is vital to successful conservation, but the tools used to communicate species-habitat relationships are often poorly suited to the information needs of conservation practitioners. Here we present a novel method for translating a statistical species-habitat model, a regression analysis relating ring-necked pheasant abundance to landcover, into an interactive online tool. The Pheasant Habitat Simulator combines the analytical power of the R programming environment with the user-friendly Shiny web interface to create an online platform in which wildlife professionals can explore the effects of variation in local landcover on relative pheasant habitat suitability within spatial scales relevant to …


Scorpions Of The Horn Of Africa (Arachnida: Scorpiones). Part Xiii. Review Of Pandinops Hawkeri, P. Peeli, P. Platycheles, And P. Pugilator (Scorpionidae), František Kovařík, Graeme Lowe, Hassan Sh Abdirahman Elmi Dec 2017

Scorpions Of The Horn Of Africa (Arachnida: Scorpiones). Part Xiii. Review Of Pandinops Hawkeri, P. Peeli, P. Platycheles, And P. Pugilator (Scorpionidae), František Kovařík, Graeme Lowe, Hassan Sh Abdirahman Elmi

Euscorpius

Pandinops platycheles (Werner, 1916) is diagnosed and fully complemented with color photos of types, and Pandinops pugilator (Pocock, 1900) is diagnosed and fully complemented with color photos of live and preserved specimens, as well as its habitat. The hemispermatophore of P. pugilator is illustrated and described for the first time. Pandinus hawkeri Pocock, 1900 and Pandinus peeli Pocock, 1900 are synonymized with Pandinops pugilator (Pocock, 1900).


Expression And Role Of Gonadotropin-Releasing Hormone 2 And Its Receptor In Mammals, Amy Desaulniers, Rebecca A. Cederberg, Clay A. Lents, Brett R. White Dec 2017

Expression And Role Of Gonadotropin-Releasing Hormone 2 And Its Receptor In Mammals, Amy Desaulniers, Rebecca A. Cederberg, Clay A. Lents, Brett R. White

Department of Animal Science: Faculty Publications

Gonadotropin-releasing hormone 1 (GnRH1) and its receptor (GnRHR1) drive mammalian reproduction via regulation of the gonadotropins. Yet, a second form of GnRH (GnRH2) and its receptor (GnRHR2) also exist in mammals. GnRH2 has been completely conserved throughout 500 million years of evolution, signifying high selection pressure and a critical biological role. However, the GnRH2 gene is absent (e.g., rat) or inactivated (e.g., cow and sheep) in some species but retained in others (e.g., human, horse, and pig). Likewise, many species (e.g., human, chimpanzee, cow, and sheep) retain the GnRHR2 gene but lack the appropriate coding sequence to produce a full-length …


Habitat Use Of Blacktip Sharks (Carcharhinus Limbatus) At Fishing Piers, Kelsey L. Spencer Dec 2017

Habitat Use Of Blacktip Sharks (Carcharhinus Limbatus) At Fishing Piers, Kelsey L. Spencer

Electronic Theses and Dissertations

Blacktip sharks (Carcharhinus limbatus) can be observed near fishing piers throughout the summer along the northeast coast of South Carolina. These piers attract and support a wide variety of potential prey and sharks are able to forage on fishers’ discards with minimal energetic cost. I tagged 12 blacktip sharks with acoustic transmitters, monitored piers with acoustic receivers, and conducted pier-creel surveys to determine the habitat use of blacktip sharks at fishing piers, factors that influenced residence time and presence/absence at piers, and any cyclical patterns in visits to piers. Data were analyzed with pier association indices (PAI), mixed models, and …


Identification And Quantification Of Cyanide And Its Metabolites In Lemur Urine, Jeremy Peralta Dec 2017

Identification And Quantification Of Cyanide And Its Metabolites In Lemur Urine, Jeremy Peralta

Student Theses

Cyanide is a chemical compound that contains the monovalent groups of carbon and nitrogen. This substance is considered a rapidly acting deadly chemical. However, some animals such as lemurs consume food products that are known to contain elevated levels of cyanide without major consequences. The mechanism by which the lemur can handle this high exposure to cyanide is unknown. In this study, we developed and validated two analytical methods for the determination of cyanide and two metabolites, thiocyanate and 2-aminothiazoline-4-carboxylic acid (ATCA) in lemur urine. The method was applied to 47 authentic lemur urine samples collected from 4 different species …


Scorpions Of The Horn Of Africa (Arachnida: Scorpiones). Part Xii. Pandinurus Hangarale Sp. N. (Scorpionidae) From Somaliland And A Review Of Type Locality And True Distribution Of Pandinurus Smithi (Pocock, 1897), František Kovařík, Graeme Lowe, Tomáš Mazuch, Ahmed Ibrahim Awale, Jana Štundlová, František Šťáhlavský Dec 2017

Scorpions Of The Horn Of Africa (Arachnida: Scorpiones). Part Xii. Pandinurus Hangarale Sp. N. (Scorpionidae) From Somaliland And A Review Of Type Locality And True Distribution Of Pandinurus Smithi (Pocock, 1897), František Kovařík, Graeme Lowe, Tomáš Mazuch, Ahmed Ibrahim Awale, Jana Štundlová, František Šťáhlavský

Euscorpius

Pandinurus hangarale sp. n. from Somaliland is described and fully complemented with color photos of live and preserved specimens, as well as its habitat. Hemispermatophore of P. hangarale sp. n. is illustrated and described. In addition to the analyses of external morphology and hemispermatophores, we also describe the karyotype of P. hangarale sp. n. (2n=120). Known localities of Pandinurus smithi (Pocock, 1897) are compiled; the type locality is not in Somaliland but in Ethiopia (Turfa) and in reality it is probably an endemic of Ethiopia.


Assessing Preservation Priorities Of Caves And Karst Areas Using The Frequency Of Endemic Cave-Dwelling Species, Eugen Nitzu, Marius Vlaicu, Andrei Giurginca, Ioana N. Meleg, Ionut Popa, Augustin Nae, Ştefan Baba Dec 2017

Assessing Preservation Priorities Of Caves And Karst Areas Using The Frequency Of Endemic Cave-Dwelling Species, Eugen Nitzu, Marius Vlaicu, Andrei Giurginca, Ioana N. Meleg, Ionut Popa, Augustin Nae, Ştefan Baba

International Journal of Speleology

Endemic and rare species as bioindicators of habitat vulnerability were used to develop protection and management plans for biotope prioritization (mainly islands habitats, lava tubes or groundwaters). Due to their narrow distribution, the endemic species (species confined to a restricted geographic area) are more susceptible to ecological disequilibrium and habitat loss than the widespread ones. Consequently, endemics become endangered in the context of ecological disturbance caused by anthropogenic pressure, making them suitable candidates to assess environmental preservation needs. Taking into consideration that most of the stygobitic and troglobitic species are endemic and confined to specific karst areas, based on their …