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2019

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Articles 61 - 90 of 417

Full-Text Articles in Zoology

Economic And Livestock Health Impacts Of Birds On Dairies: Evidence From A Survey Of Washington Dairy Operators, Julie L. Elser, Amber L. Adams Progar, Karen M.M. Steensma, Tyler P. Caskin, Susan R. Kerr, Stephanie A. Shwiff Sep 2019

Economic And Livestock Health Impacts Of Birds On Dairies: Evidence From A Survey Of Washington Dairy Operators, Julie L. Elser, Amber L. Adams Progar, Karen M.M. Steensma, Tyler P. Caskin, Susan R. Kerr, Stephanie A. Shwiff

United States Department of Agriculture Wildlife Services: Staff Publications

The survey described in this research paper aimed to investigate the economic and health impacts of birds on dairies. Birds are common pests on dairies, consuming and contaminating feed intended for cattle. As a result, dairy operators experience increased feed costs and increased pathogen and disease risk. We surveyed dairy operators attending the 2017 Washington Dairy Conference to examine the impact of birds on dairies in Washington State. Dairy operators reported feed losses valued at $55 per cow resulting in annual losses totaling $5.5 million in the Western region of the state and $9.2 million in the Eastern region of …


Double-Crested Cormorant Colony Effects On Soil Chemistry, Vegetation Structure And Avian Diversity, Leah Moran Veum, Brian S. Dorr, Katie C. Hanson-Dorr, R.J. Moore, Scott A. Rush Sep 2019

Double-Crested Cormorant Colony Effects On Soil Chemistry, Vegetation Structure And Avian Diversity, Leah Moran Veum, Brian S. Dorr, Katie C. Hanson-Dorr, R.J. Moore, Scott A. Rush

United States Department of Agriculture Wildlife Services: Staff Publications

Effects of Double-crested Cormorants (Phalacrocorax auritus) on vegetation, soil chemistry and tree health have been documented from their breeding colonies in the northern breeding grounds of Canada and the United States (U.S.) but not for areas within the southeastern United States where breeding activity is relatively novel. We compared vegetation and tree metrics such as structure diversity, and soil chemistry among colony islands, uninhabited islands, and abandoned colony islands within Guntersville Reservoir, a temperate forest ecosystem. Avian diversity and community structure were also quantified on these islands. Concentrations of potassium (K), phosphorus (P) and nitrate (NO3 −) in soil were …


Bourbon Virus In Wild And Domestic Animals, Missouri, Usa, 2012–2013, Katelin C. Jackson, Thomas Gidlewski, J. Jeffrey Root, Angela M. Bosco-Lauth, R. Ryan Lash, Jessica R. Harmon, Aaron C. Brault, Nicholas A. Panella, William L. Nicholson, Nicholas Komar Sep 2019

Bourbon Virus In Wild And Domestic Animals, Missouri, Usa, 2012–2013, Katelin C. Jackson, Thomas Gidlewski, J. Jeffrey Root, Angela M. Bosco-Lauth, R. Ryan Lash, Jessica R. Harmon, Aaron C. Brault, Nicholas A. Panella, William L. Nicholson, Nicholas Komar

United States Department of Agriculture Wildlife Services: Staff Publications

Bourbon virus (BRBV) was first isolated from a febrile patient with a history of tick bites in Bourbon County, Kansas, USA; the patient later died from severe illness in 2014 (1). Several additional human BRBV infections were reported subsequently from the midwestern and southern United States (2). BRBV belongs to the family Orthomyxoviridae, genus Thogotovirus, which is distributed worldwide and includes Araguari, Aransas Bay, Dhori, Jos, Thogoto, and Upolu viruses (1,3). Thogoto and Dhori viruses have been associated with human disease (4–6). Viruses within the genus Thogotovirus have been associated with hard or soft ticks (7). Recent studies suggest that …


New Wilson’S Phalarope Nesting Record From The Central Platte River Valley, Mormon Island, Hall County, Nebraska, Andrew J. Caven, Bethany L. Ostrom, Aurora Fowler, Joshua D. Wiese, Kelsey C. King Sep 2019

New Wilson’S Phalarope Nesting Record From The Central Platte River Valley, Mormon Island, Hall County, Nebraska, Andrew J. Caven, Bethany L. Ostrom, Aurora Fowler, Joshua D. Wiese, Kelsey C. King

Nebraska Bird Review

The southeastern portion of the Wilson’s Phalarope’s (Phalaropus tricolor) breeding range encompasses parts of Nebraska (Colwell and Jehl 1994), including the Sandhills and northern Panhandle (Silcock and Jorgensen 2018). Additionally, there have been a number of breeding records from southcentral and southeastern Nebraska within the Rainwater Basin ecoregion since the mid-1990s (Mollhoff 2016, Silcock and Jorgensen 2018). However, there is very little evidence of regular breeding activity in the nearby Central Platte River Valley (CPRV), which spans from Chapman west to Overton, Nebraska, and is considered a globally important area for waterbirds (Johnsgard and Brown 2013, Silcock and Jorgensen 2018). …


Summer Field Report, June - July 2019, W. Ross Silcock Sep 2019

Summer Field Report, June - July 2019, W. Ross Silcock

Nebraska Bird Review

There was a lot to ponder this summer, including several notable breeding records of waterbirds, including the 3rd for Canvasback and an “unprecedented” breeding season for Eared Grebe in the Rainwater Basin. Intriguing summer occurrences that might presage or indicate nesting were large numbers of Redhead and Ring-necked Duck in larger wetlands, the 3rd Jun record of Dusky Flycatcher, first Jun record of Baird’s Sparrow, 3rd summer record of Ash-throated Flycatcher, and a Sage Thrasher in Jun in Kimball County. Additional breeding records of interest were the 10 Peregrine Falcons fledged at three Omaha sites, possible nesting by Mississippi Kites …


The Nebraska Bird Review, Volume 87 September 2019 Number 3 Sep 2019

The Nebraska Bird Review, Volume 87 September 2019 Number 3

Nebraska Bird Review

Summer Field Report, June - July 2019, by W. Ross Silcock …74-95

2018 (30th) Report of the NOU Records Committee, by Mark A. Brogie … 96-109

New Wilson's Phalarope Nesting Record from the Central Platte River Valley, Mormon Island, Hall County, Nebraska by Andrew J. Caven, Bethany Ostrom, Aurora Fowler, Joshua D. Wiese, Kelsey C. King …110-114

Subscription and Organization Information …115


Crevalle Jack (Caranx Hippos), Alois Romanowski, David Kerstetter Sep 2019

Crevalle Jack (Caranx Hippos), Alois Romanowski, David Kerstetter

All Scans: Kerstetter Fisheries and Avian Ecology 3D Scan Series

Crevalle Jack (Caranx hippos) collected from Broward County, Florida and prepped by David Kerstetter in 2016.


Predicting Functional Responses In Agro-Ecosystems From Animal Movement Data To Improve Management Of Invasive Pests, Mark Q. Wilber, Sarah M. Chinn, James C. Beasley, Raoul K. Bourghton, Ryan K. Brooks, Stephen S. Ditchkoff, Justin W. Fischer, Steve B. Hartley, Lindsey K. Holmstrom, John C. Kilgo, Jesse S. Lewis, Ryan S. Miller, Nathan P. Snow, Kurt C. Vercauteren, Samantha M. Wisely, Colleen T. Webb, Kim M. Peen Sep 2019

Predicting Functional Responses In Agro-Ecosystems From Animal Movement Data To Improve Management Of Invasive Pests, Mark Q. Wilber, Sarah M. Chinn, James C. Beasley, Raoul K. Bourghton, Ryan K. Brooks, Stephen S. Ditchkoff, Justin W. Fischer, Steve B. Hartley, Lindsey K. Holmstrom, John C. Kilgo, Jesse S. Lewis, Ryan S. Miller, Nathan P. Snow, Kurt C. Vercauteren, Samantha M. Wisely, Colleen T. Webb, Kim M. Peen

United States Department of Agriculture Wildlife Services: Staff Publications

Functional responses describe how changing resource availability affects consumer resource use, thus providing a mechanistic approach to prediction of the invasibility and potential damage of invasive alien species (IAS). However, functional responses can be context dependent, varying with resource characteristics and availability, consumer attributes, and environmental variables. Identifying context dependencies can allow invasion and damage risk to be predicted across different ecoregions. Understanding how ecological factors shape the functional response in agro-ecosystems can improve predictions of hotspots of highest impact and inform strategies to mitigate damage across locations with varying crop types and availability. We linked heterogeneous movement data across …


Landscape Factors That Influence European Starling (Sturnus Vulgaris) Nest Box Occupancy At Nasa Plum Brook Station (Pbs), Erie County, Ohio, Usa, Morgan Pfeiffer, Thomas W. Seamans, Bruce N. Buckingham, Bradley F. Blackwell Sep 2019

Landscape Factors That Influence European Starling (Sturnus Vulgaris) Nest Box Occupancy At Nasa Plum Brook Station (Pbs), Erie County, Ohio, Usa, Morgan Pfeiffer, Thomas W. Seamans, Bruce N. Buckingham, Bradley F. Blackwell

United States Department of Agriculture Wildlife Services: Staff Publications

During the last decade at NASA Plum Brook Station (PBS), Erie County, Ohio, United States, there has been a nearly 50% decrease in European Starling (Sturnus vulgaris) occupancy (nests with ≥1 egg) of nest boxes designed to be used by starlings. Increased availability of natural cavities, from invertebrate pests, might have altered nest box occupation rates. It was hypothesized that starling nest box occupation rates would be a function of an index of potentially suitable tree cavities for nesting starlings, the semi-colonial nature of breeding starlings, and access to foraging areas (e.g., mowed lawns near buildings). Specifically, it was predicted …


Neotype Designation For Pectinibuthus Birulai Fet, 1984 (Scorpiones: Buthidae) From Turkmenistan, With Remarks On Pectine Teeth Of Psammophile Scorpions, Victor Fet, František Kovařík, Graeme Lowe Aug 2019

Neotype Designation For Pectinibuthus Birulai Fet, 1984 (Scorpiones: Buthidae) From Turkmenistan, With Remarks On Pectine Teeth Of Psammophile Scorpions, Victor Fet, František Kovařík, Graeme Lowe

Euscorpius

A neotype is designated for a very rare Central Asian scorpion, Pectinibuthus birulai Fet, 1984, the sole species of the genus Pectinibuthus Fet, 1984. It is the only currently known specimen, collected by Victor Fet in July 1985, and deposited in ZISP (St. Petersburg, Russia). The original types are considered lost. Detailed photographs of the neotype are provided, as well as comments on this unique psammophile buthid. We also discuss and compare pectinal tooth counts of psammophile scorpions relative to other scorpions.


Comparison Of The Efficacy Of Four Drug Combinations For Immobilization Of Wild Pigs, Christine K. Ellis, Morgan E. Wehtje, Lisa L. Wolfe, Peregrine L. Wolff, Clayton D. Hilton, Mark C. Fisher, Shari Green, Michael P. Glow, Joeseph M. Halseth, Michael J. Lavelle, Nathan P. Snow, Eric H. Vannatta, Jack C. Rhyan, Kurt C. Vercauteren, William R. Lance, Pauline Nol Aug 2019

Comparison Of The Efficacy Of Four Drug Combinations For Immobilization Of Wild Pigs, Christine K. Ellis, Morgan E. Wehtje, Lisa L. Wolfe, Peregrine L. Wolff, Clayton D. Hilton, Mark C. Fisher, Shari Green, Michael P. Glow, Joeseph M. Halseth, Michael J. Lavelle, Nathan P. Snow, Eric H. Vannatta, Jack C. Rhyan, Kurt C. Vercauteren, William R. Lance, Pauline Nol

United States Department of Agriculture Wildlife Services: Staff Publications

Field immobilization of native or invasive wild pigs (Sus scrofa) is challenging. Drug combinations commonly used often result in unsatisfactory immobilization, poor recovery, and adverse side effects, leading to unsafe handling conditions for both animals and humans. We compared four chemical immobilization combinations, medetomidine–midazolam–butorphanol (MMB), butorphanol–azaperone–medetomidine (BAM™), nalbuphine–medetomidine–azaperone (NalMed-A), and tiletamine– zolazepam–xylazine (TZX), to determine which drug combinations might provide better chemical immobilization of wild pigs. We achieved adequate immobilization with no post-recovery morbidity withMMB. Adequate immobilization was achieved with BAM™; however, we observed post-recovery morbidity. Both MMB and BAM™ produced more optimal results relative to body temperature, recovery, and …


Vision In An Abundant North American Bird: The Red-Winged Blackbird, Esteban Fernández-Juricic, Patrice E. Baumhardt, Luke P. Tyrrell, Amanda Elmore, Shelagh T. Deliberto, Scott J. Werner Aug 2019

Vision In An Abundant North American Bird: The Red-Winged Blackbird, Esteban Fernández-Juricic, Patrice E. Baumhardt, Luke P. Tyrrell, Amanda Elmore, Shelagh T. Deliberto, Scott J. Werner

United States Department of Agriculture Wildlife Services: Staff Publications

Avian vision is fundamentally different from human vision; however, even within birds there are substantial between species differences in visual perception in terms of visual acuity, visual coverage, and color vision. However, there are not many species that have all these visual traits described, which can constrain our ability to study the evolution of visual systems in birds. To start addressing this gap, we characterized multiple traits of the visual system (visual coverage, visual acuity, centers of acute vision, and color vision) of the Red-winged Blackbird (Agelaius phoeniceus), one of the most abundant and studied birds in North America. We …


A New Species Of Catalinia Soleglad Et Al., 2017 (Scorpiones: Vaejovidae) From Southern California, Usa, Rolando Teruel, Brandon Myers Aug 2019

A New Species Of Catalinia Soleglad Et Al., 2017 (Scorpiones: Vaejovidae) From Southern California, Usa, Rolando Teruel, Brandon Myers

Euscorpius

Herein we describe a new species of the vaejovid scorpion genus Catalinia Soleglad, Ayrey, Graham & Fet, 2017. It was collected in a single locality of the northwestern foothills of the Santa Ana Mountains. It is most closely related to both Catalinia andreas (Gertsch & Soleglad, 1972) and C. minima (Kraepelin, 1911), but is clearly distinguished by tegumentary sculpture, morphometric ratios and pectinal tooth counts. The new species is described and illustrated in detail, with some ecological data included; moreover, a minor correction is introduced to the diagnosis of the genus.


Shrews From Moist Temperate Forests Of Azad Jammu And Kashmir, Andleeb Batool, Muhammad Asif Gondal, Jibran Haider Aug 2019

Shrews From Moist Temperate Forests Of Azad Jammu And Kashmir, Andleeb Batool, Muhammad Asif Gondal, Jibran Haider

Journal of Bioresource Management

The soricidae family comprises of nearly 23 genera out of which approximately 200 species have been associated with the Eurasian region (IUCN, 1995). A lot of ambiguity surrounds this family, especially where taxonomic classification is concerned; also, not much is known about their geographic location. Five protected parks from Azad Jammu and Kashmir (AJK) were explored for population trend studies of family soricidae. Dhirkot Nature Reserve (DNR) was observed in February, 2008, Banjosa Nature Reserve (BNR) in May-June, 2009, Tolipir National Park (TNP) in April to May, 2008, Pir Chanasi National Park (PCNP) in April to May, 2010 and Pir …


Insect Diversity In Some Rural Areas District Bagh Jammu And Kashmir (Pakistan), Abu Ul Hassan Faiz, Mehboob Ul Hassan, Mikhail F Bagaturov, Ghazal Tariq, Lariab Zahra Faiz Aug 2019

Insect Diversity In Some Rural Areas District Bagh Jammu And Kashmir (Pakistan), Abu Ul Hassan Faiz, Mehboob Ul Hassan, Mikhail F Bagaturov, Ghazal Tariq, Lariab Zahra Faiz

Journal of Bioresource Management

The present study was designed to find species composition and diversity of insects in (Cultivated area, wild area, suburban) existing at different trophic level of food chain in Bagh. The study was conducted from November, 2017 to September, 2018. Fifty-two species of insects belonging to 33 families were recorded. The diversity of insects in all studied area were same but significant difference in density of insects was found.


Low Secondary Risks For Captive Coyotes From A Sodium Nitrite Toxic Bait For Invasive Wild Pigs, Nathan P. Snow, Katherine E. Horak, Simon T. Humphrys, Linton D. Staples, David G. Hewitt, Kurt C. Vercauteren Aug 2019

Low Secondary Risks For Captive Coyotes From A Sodium Nitrite Toxic Bait For Invasive Wild Pigs, Nathan P. Snow, Katherine E. Horak, Simon T. Humphrys, Linton D. Staples, David G. Hewitt, Kurt C. Vercauteren

United States Department of Agriculture Wildlife Services: Staff Publications

An acute toxic bait is being developed to deliver micro‐encapsulated sodium nitrite (SN) to stimulate severe methemoglobinemia and humane death for invasive wild pigs (Sus scrofa), thereby providing a new tool for reducing their populations. During April 2016, we evaluated sensitivity to SN and outcomes of secondary consumption in the ubiquitous mammalian scavenger, coyote (Canis latrans), to determine secondary risks of consuming carcasses of wild pigs that died from consuming the SN toxic bait. At the National Wildlife Research Center in Fort Collins, Colorado, USA, we first evaluated whether coyotes fed carcasses of domestic pigs killed by consumption of SN …


A New “Vorhiesi” Group Species Of Vaejovis From The Galiuro Mountains, Southern Arizona (Scorpiones: Vaejovidae), Richard F. Ayrey, Brandon Myers Aug 2019

A New “Vorhiesi” Group Species Of Vaejovis From The Galiuro Mountains, Southern Arizona (Scorpiones: Vaejovidae), Richard F. Ayrey, Brandon Myers

Euscorpius

A new scorpion species, Vaejovis stetsoni sp. n. is described from Galiuro Mountains, Graham County, Arizona. This is the smallest species of the “vorhiesi” group discovered so far, most similar to V. brysoni Ayrey & Webber. The pedipalp fixed finger has five ID denticles and the movable finger has six, like in most other southern Arizona Vaejovis. The most unique characteristics of this species are its small size (18.35 mm) and a large subaculear tubercle.


Scorpions Of Sri Lanka (Arachnida: Scorpiones). Part Iii. Heterometrus Yaleensis Sp. N. (Scorpionidae), František Kovařík, Kithsiri B. Ranawana, V. A. Sanjeewa Jayarathne, David Hoferek, František Šťáhlavský Aug 2019

Scorpions Of Sri Lanka (Arachnida: Scorpiones). Part Iii. Heterometrus Yaleensis Sp. N. (Scorpionidae), František Kovařík, Kithsiri B. Ranawana, V. A. Sanjeewa Jayarathne, David Hoferek, František Šťáhlavský

Euscorpius

Heterometrus yaleensis sp. n. from Sri Lanka, Southern Province, Yale National Park is described and compared with other species of the genus. The presence of a unique dorsointernal carina on the pedipalp chela distinguishes H. yaleensis sp. n. from all other Heterometrus species. Additional information is provided on the taxonomy and distribution of the genus Heterometrus in Sri Lanka, fully complemented with color photos of specimens of both sexes of the new species, as well as of their habitat. In addition to external morphology and hemispermatophore, we also describe the karyotype of H. yaleensis sp. n. (2n=99).


2018 (30th) Report Of The Nou Records Committee, Mark A. Brogie Aug 2019

2018 (30th) Report Of The Nou Records Committee, Mark A. Brogie

Nebraska Bird Review

2018 Additions/Deletions to the "Official List of the Birds of Nebraska”: There was one new species added in 2018. Fulvous Whistling-Duck (Dendrocygna bicolor) Accidental - Class 1-P. With this addition, the “Official List of the Birds of Nebraska” stands at 463 species.

2018 Changes in Frequency of Occurrence

Changes Involving Nebraska Species Due to Taxonomic Revisions

NOURC Accepted Records (Received in 2018)

NOURC Unaccepted Records (Received in 2018)


The Mayfly Newsletter, Donna J. Giberson Aug 2019

The Mayfly Newsletter, Donna J. Giberson

The Mayfly Newsletter

The Mayfly Newsletter is the official newsletter of the Permanent Committee of the International Conferences on Ephemeroptera.


Effects Of Protective Nesting Site Properties On Gyrfalcon Breeding Success And Parental Investment In Western Alaska, Michael Thomas Henderson Aug 2019

Effects Of Protective Nesting Site Properties On Gyrfalcon Breeding Success And Parental Investment In Western Alaska, Michael Thomas Henderson

Boise State University Theses and Dissertations

Habitat suitability for wildlife is defined at scales ranging from the landscape to an individual breeding site. Areas that fulfill habitat requirements for birds disproportionally maintain populations, and the identification of variables that distinguish optimal breeding sites helps to prioritize conservation. Nesting site characteristics that protect breeding raptors from harsh weather can promote a more favorable microclimate and increase breeding success, although previous attempts to understand this effect in breeding Gyrfalcons have yielded ambiguous results. Additionally, breeding adults incur substantial costs from the physical shielding of eggs and nestlings, particularly in the Arctic, and it is possible that protective properties …


The Value Of Inspection Stations For Detecting Nonindigenous Species Lacking Agricultural Significance: The Mexican Treefrog, Smilisca Baudinii Complex (Duméril And Bibron 1841) (Hylidae), Interdicted In Florida, Usa, From A Shipment Of Peppers, Louis A. Somma Aug 2019

The Value Of Inspection Stations For Detecting Nonindigenous Species Lacking Agricultural Significance: The Mexican Treefrog, Smilisca Baudinii Complex (Duméril And Bibron 1841) (Hylidae), Interdicted In Florida, Usa, From A Shipment Of Peppers, Louis A. Somma

Papers in Herpetology

A Mexican Treefrog, Smilisca baudinii, a nonindigenous species, was interdicted for the first time from an imported shipment of peppers. The value of agriculture inspection stations used to make these interdictions is discussed. This is a single cargo interception (Stage 1: Colautti and MacIsaac 2004) and the first record for S. baudinii intercepted in Florida. Currently no evidence suggests that S. baudinii has been successfully introduced into and established in Florida, although this species could survive climatic conditions in the southern part of the state and at the scheduled destination of this shipment.

Cargo transport of alien species is a …


Spatial And Temporal Variation In The Diet Composition Of Zooplankton In Mission Bay, Bryanna Paulson Aug 2019

Spatial And Temporal Variation In The Diet Composition Of Zooplankton In Mission Bay, Bryanna Paulson

Theses

Analyses of quantitative data on zooplankton diets are vital for understanding the drivers of zooplankton abundance within an ecosystem. Such analyses also provide insight into trophic pathways within the lower planktonic food web, which support populations of higher trophic level species. This study used carbon and nitrogen stable isotope ratios of size-fractionated plankton in Mission Bay, San Diego, CA to examine the spatial and temporal variation in zooplankton trophic ecology and determine potential environmental drivers of zooplankton community structure. Carbon stable isotopes reflect primary production sources in an organism’s diet, and nitrogen stable isotope ratios can be used to estimate …


Old Enemies With New Problems?: Investigating The Ecological Relationship Between Ridgway’S Hawk And The Parasitic Nest Fly Philornis Pici, Christine Deegear Hayes Aug 2019

Old Enemies With New Problems?: Investigating The Ecological Relationship Between Ridgway’S Hawk And The Parasitic Nest Fly Philornis Pici, Christine Deegear Hayes

Boise State University Theses and Dissertations

Modern conservation efforts tend not to focus on individual species, but rather on the entire ecosystem of a species in peril. Many ecological factors can affect a species’ ability to maintain healthy populations. Parasites, which derive nutrients at the expense of their hosts, can reduce host fitness and limit population growth, acting as biological controls in healthy ecosystems. The negative impacts of parasites on their hosts can be exacerbated by climate change and anthropogenic land-use practices in ways that may limit recovery or drive host species to extinction. Introduced parasitic nest flies in the genus Philornis (Diptera: Muscidae) are threatening …


Validation Of A Death Assay For Angiostrongylus Cantonensis Larvae (L3) Using Propidium Iodide In A Rat Model (Rattus Norvegicus), Susan I. Jarvi, John Jacob, Robert T. Sugihara, Israel L. Leinbach, Ina H. Klasner, Lisa M. Kaluna, Kirsten A. Snook, M. Kathleen Howe, Steven H. Jacquier, Ingo Lange, Abigail L. Atkinson, Ashley R. Deane, Chris N. Niebuhr, Shane R. Siers Jul 2019

Validation Of A Death Assay For Angiostrongylus Cantonensis Larvae (L3) Using Propidium Iodide In A Rat Model (Rattus Norvegicus), Susan I. Jarvi, John Jacob, Robert T. Sugihara, Israel L. Leinbach, Ina H. Klasner, Lisa M. Kaluna, Kirsten A. Snook, M. Kathleen Howe, Steven H. Jacquier, Ingo Lange, Abigail L. Atkinson, Ashley R. Deane, Chris N. Niebuhr, Shane R. Siers

United States Department of Agriculture Wildlife Services: Staff Publications

Angiostrongylus cantonensis is a pathogenic nematode and the cause of neuroangiostrongyliasis, an eosinophilic meningitis more commonly known as rat lungworm disease. Transmission is thought to be primarily due to ingestion of infective third stage larvae (L3) in gastropods, on produce, or in contaminated water. The gold standard to determine the effects of physical and chemical treatments on the infectivity of A. cantonensis L3 larvae is to infect rodents with treated L3 larvae and monitor for infection, but animal studies are laborious and expensive and also raise ethical concerns. This study demonstrates propidium iodide (PI) to be a reliable marker of …


Contact Rates With Nesting Birds Before And After Invasive Snake Removal: Estimating The Effects Of Trap-Based Control, Amy A. Yackel Adams, Melia G. Nafus, Page E. Klug, Björn Lardner, M.J. Mazurek, Julie A. Savidge, Robert N. Reed Jul 2019

Contact Rates With Nesting Birds Before And After Invasive Snake Removal: Estimating The Effects Of Trap-Based Control, Amy A. Yackel Adams, Melia G. Nafus, Page E. Klug, Björn Lardner, M.J. Mazurek, Julie A. Savidge, Robert N. Reed

United States Department of Agriculture Wildlife Services: Staff Publications

Invasive predators are responsible for almost 60% of all vertebrate extinctions worldwide with the most vulnerable faunas occurring on islands. The brown treesnake (Boiga irregularis) is a notorious invasive predator that caused the extirpation or extinction of most native forest birds on Guam. The success of avian reintroduction efforts on Guam will depend on whether snake-control techniques sufficiently reduce contact rates between brown treesnakes and reintroduced birds. Mouse-lure traps can successfully reduce brown treesnake populations at local scales. Over a 22-week period both with and without active snake removal, we evaluated snake-trap contact rates for mouse- and bird-lure traps. Bird-lure …


An Evaluation Of The Registration And Use Prospects For Four Candidate Toxicants For Controlling Invasive Mongooses (Herpestes Javanicus Auropunctatus), Emily W. Ruell, Chris N. Niebuhr, Robert T. Sugihara, Shane R. Siers Jul 2019

An Evaluation Of The Registration And Use Prospects For Four Candidate Toxicants For Controlling Invasive Mongooses (Herpestes Javanicus Auropunctatus), Emily W. Ruell, Chris N. Niebuhr, Robert T. Sugihara, Shane R. Siers

United States Department of Agriculture Wildlife Services: Staff Publications

The eradication or control of invasive small Indian mongooses from islands likely requires toxic baiting when removal by trapping proves insufficient. The one toxic bait currently registered for mongooses in the United States has relatively low palatability and efficacy for mongooses. Developing and registering a new pesticide can be very expensive, while funding for developing toxicants for mongooses is limited. Once registered, use of a toxic bait may be hindered by other factors, such as public opposition to an inhumane toxicant, poorer efficacy than expected, or if the toxic bait is difficult for applicators to apply or store. Therefore, we …


The Multifaceted Effects Induced By Floods On The Macroinvertebrate Communities Inhabiting A Sinking Cave Stream, Octavian Pacioglu, Nicoleta Ianovici, Mărioara N. Filimon, Adrian Sinitean, Gabriel Iacob, Henrietta Barabas, Alexandru Pahomi, Andrei Acs, Hanelore Muntean, Lucian Pârvulescu Jul 2019

The Multifaceted Effects Induced By Floods On The Macroinvertebrate Communities Inhabiting A Sinking Cave Stream, Octavian Pacioglu, Nicoleta Ianovici, Mărioara N. Filimon, Adrian Sinitean, Gabriel Iacob, Henrietta Barabas, Alexandru Pahomi, Andrei Acs, Hanelore Muntean, Lucian Pârvulescu

International Journal of Speleology

First-order sinking cave streams experience considerable hydrological variability, including spates and periods of base-flow during dry seasons. Early-summer flooding on a first-order stream sinking in Ciur-Ponor Cave (Romania) represented a suitable opportunity to test the response of the macroinvertebrate community and of basal food resources quantity and diversity to such a disturbance event. The invertebrate community and basal resources (i.e., woody debris, leaves, fine particulate organic matter and epilithon) were collected from three sampling sites, before and after the flood. The sampling strategy followed an up-downstream gradient of both species diversity and quantity of allochtonous organic matter decrease as the …


Species-Area Model Predicting Diversity Loss In An Artificially Flooded Cave In Brazil, Rodrigo L. Ferreira, Thais G. Pellegrini Jul 2019

Species-Area Model Predicting Diversity Loss In An Artificially Flooded Cave In Brazil, Rodrigo L. Ferreira, Thais G. Pellegrini

International Journal of Speleology

Subterranean environments are poorly known regarding many ecological aspects, such as community structure and its response to different disturbances. To estimate the effects of ground area lost in a limestone cave community in Southeastern Brazil, the invertebrate fauna was sampled before 76% of the cave floor was submerged by the filling of a hydroeletric power plant reservoir. Then, a 2-year monitoring was conducted. A species-area curve based on empiric data was constructed and the z-value of the species-area equation was calculated, what allowed estimating the expected cave richness after flooding comparing with data obtained during the monitoring. The results support …


Tourism And African Elephant (Loxodonta Africana) Behavior In Zambezi National Park, Zimbabwe, Brigit Rooney Jul 2019

Tourism And African Elephant (Loxodonta Africana) Behavior In Zambezi National Park, Zimbabwe, Brigit Rooney

Masters Theses & Specialist Projects

As charismatic megafauna and a flagship species, African elephants (Loxodonta africana) are vital to the African tourist economy. Conversely, high levels of wildlife tourism can induce behavioral shifts that push desired animals into less frequented areas and disrupt natural behaviors. In order to examine this trade-off, tourism levels and African elephant behaviors were studied in Zambezi National Park (ZNP) near Victoria Falls, Zimbabwe. Over the course of 14 weeks, in-person observations and camera traps in ZNP were used to collect geographic, demographic, and behavioral data from elephant sightings. As a proxy for human presence, geo-locational data were collected for each …