Search results for: Michael L. Avery

Items from 1 to 20 out of 34 results

article

Development of microsatellite loci for two New World vultures (Cathartidae)

Darren J. Wostenberg, Jennifer A. Fike, Sara J. Oyler-McCance, Michael L. Avery, more

BMC Research Notes > 2019 > 12 > 1 > 1-6

Objective Use next-generation sequencing to develop microsatellite loci that will provide the variability necessary for studies of genetic diversity and population connectivity of two New World vulture species. Results We characterized 11 microsatellite loci for black vultures (Coragyps atratus) and 14 loci for turkey vultures (Cathartes aura). These microsatellite loci were grouped into 3 multiplex...

article

Allowable take of black vultures in the eastern United States

Guthrie S. Zimmerman, Brian A. Millsap, Michael L. Avery, John R. Sauer, more

The Journal of Wildlife Management > 83 > 2 > 272 - 282

Black vultures (Coragyps atratus) have been increasing in density and expanding their range in the eastern United States since at least the 1960s. In many areas, their densities have increased to the level where they are causing damage to property and livestock and the number of requests for allowable take permits has increased throughout these areas. The United States Fish and Wildlife Service (USFWS)...

article

Plant community shifts caused by feral swine rooting devalue Florida rangeland

Brittany Bankovich, Elizabeth Boughton, Raoul Boughton, Michael L. Avery, more

Agriculture, Ecosystems & Environment > 2016 > 220 > C > 45-54

Invasive species threaten agriculture by changing agroecosystem structure and function, reducing habitat value, decreasing biodiversity and ecosystem services and increasing management costs. Grazing lands in south central Florida are a mosaic of sown pastures, native grasslands, wetlands and woodlands that provide a variety of ecosystem services. Disturbance of these pastures and native grasslands...

article

Feral swine damage to globally imperiled wetland plant communities in a significant biodiversity hotspot in Florida

Richard M. Engeman, Steve L. Orzell, Rodney K. Felix, Eric A. Tillman, more

Biodiversity and Conservation > 2016 > 25 > 10 > 1879-1898

We studied rooting damage during five-years of feral swine control at Avon Park Air Force Range, a significant botanical biodiversity hotspot in peninsular Florida with many globally imperiled plant species and communities. While control reduced swine abundance, remaining animals consistently rooted the 49 studied sites in both middle-dry season (MDS) and late-dry season (LDS) each year. At each study...

article

Limitations of population suppression for protecting crops from bird depredation: A review

George M. Linz, Enrique H. Bucher, Sonia B. Canavelli, Ethel Rodriguez, more

Crop Protection > 2015 > 76 > Complete > 46-52

Blackbirds (Icterinae) in North America, and dickcissels (Spiza americana Gmelin), eared doves (Zenaida auriculata Des Murs), and monk parakeets (Myiopsitta monachus Boddaert) in South America can cause serious economic damage to grain crops. Farmers frequently advocate lethal bird damage abatement measures based on the perceived need to take immediate action to avoid serious economic losses. In comparison,...

article

Shared genetic diversity across the global invasive range of the monk parakeet suggests a common restricted geographic origin and the possibility of convergent selection

Pim Edelaar, Severine Roques, Elizabeth A. Hobson, Anders Gonçalves da Silva, more

Molecular Ecology > 24 > 9 > 2164 - 2176

While genetic diversity is hypothesized to be an important factor explaining invasion success, there is no consensus yet on how variation in source populations or demographic processes affects invasiveness. We used mitochondrial DNA haplotypic and microsatellite genotypic data to investigate levels of genetic variation and reconstruct the history of replicate invasions on three continents in a globally...

article

Detecting an elusive invasive species: a diagnostic PCR to detect Burmese python in Florida waters and an assessment of persistence of environmental DNA

Antoinette J. Piaggio, Richard M. Engeman, Matthew W. Hopken, John S. Humphrey, more

Molecular Ecology Resources > 14 > 2 > 374 - 380

Recent studies have demonstrated that detection of environmental DNA (eDNA) from aquatic vertebrates in water bodies is possible. The Burmese python, Python bivittatus, is a semi‐aquatic, invasive species in Florida where its elusive nature and cryptic coloration make its detection difficult. Our goal was to develop a diagnostic PCR to detect P. bivittatus from water‐borne eDNA, which could assist...

article

Fine-scale, spatial and temporal assessment methods for feral swine disturbances to sensitive plant communities in south-central Florida

Rodney K. Felix, Steve L. Orzell, Eric A. Tillman, Richard M. Engeman, more

Environmental Science and Pollution Research > 2014 > 21 > 17 > 10399- 10406

Feral swine are estimated to annually cost hundreds of millions of dollars in economic loss to property and agriculture in the USA, while their ecological consequences remain largely unmeasured. Using submeter-accurate Global Positioning System technology over a multiyear project, we are quantifying in a novel way the spatial and temporal attributes of swine rooting damage within 587 ha of ecologically...

article

Weighing empirical and hypothetical evidence for assessing potential invasive species range limits: a review of the case of Burmese pythons in the USA

Richard Engeman, Michael L. Avery, Elliott Jacobson

Environmental Science and Pollution Research > 2014 > 21 > 20 > 11973- 11978

Range expansion potential is an important consideration for prioritizing management actions against an invasive species. Understanding the potential for range expansion by invasive reptiles such as the Burmese python can be challenging, because the lack of knowledge on fundamental physiological and behavioral constraints initially forces reliance on modeling to predict hypothetical invasive range...

article

Avian mortality at communication towers in the United States and Canada: which species, how many, and where?

Travis Longcore, Catherine Rich, Pierre Mineau, Beau MacDonald, more

Biological Conservation > 2013 > 158 > Complete > 410-419

Birds migrating to and from breeding grounds in the United States and Canada are killed by the millions in collisions with lighted towers and their guy wires. Avian mortality at towers is highly variable across species, and the importance to each population depends on its size and trajectory. Building on our previous estimate of avian mortality at communication towers, we calculated mortality by species...

article

Is propagule size the critical factor in predicting introduction outcomes in passeriform birds?

Michael P. Moulton, Wendell P. Cropper, Michael L. Avery

Biological Invasions > 2013 > 15 > 7 > 1449-1458

Influential analyses of the propagule pressure hypothesis have been based on multiple bird species introduced to one region (e.g. New Zealand). These analyses implicitly assume that species-level and site-level characteristics are less important than the number of individuals released. In this study we compared records of passerine introductions with propagule size information across multiple regions...

article

Optimizing line intercept sampling and estimation for feral swine damage levels in ecologically sensitive wetland plant communities

Jacob F. Thomas, Richard M. Engeman, Eric A. Tillman, Justin W. Fischer, more

Environmental Science and Pollution Research > 2013 > 20 > 3 > 1503-1510

Ecological sampling can be labor intensive, and logistically impractical in certain environments. We optimize line intercept sampling and compare estimation methods for assessing feral swine damage within fragile wetland ecosystems in Florida. Sensitive wetland sites, and the swine damage within them, were mapped using GPS technology. Evenly spaced parallel transect lines were simulated across a digital...

article

Feral swine disturbance at important archaeological sites

Richard M. Engeman, Kathy J. Couturier, Rodney K. Felix, Michael L. Avery

Environmental Science and Pollution Research > 2013 > 20 > 6 > 4093-4098

Feral swine are well known as environmentally destructive invasive animals in many areas around the world, where they degrade native habitats, harm rare plant and animal species, damage agricultural interests, and spread disease. We provide the first quantification of their potential as agents of disturbance at archaeological sites. Our study was conducted in south-central Florida at Avon Park Air...

article

An analytical framework for quantifying and testing patterns of temporal dynamics in social networks

Elizabeth A. Hobson, Michael L. Avery, Timothy F. Wright

Animal Behaviour > 2013 > 85 > 1 > 83-96

Change is fundamental to all social systems. Temporal dynamics are critical in understanding how relationships form and change over time but rarely are studied explicitly in animal groups. Social network approaches are useful in describing association patterns and provide promising tools for investigating the dynamics of change in social structure but have rarely been used to quantify how animal associations...

article

Using three-dimensional flight patterns at airfields to identify hotspots for avian–aircraft collisions

W. David Walter, Justin W. Fischer, John S. Humphrey, Trey S. Daughtery, more

Applied Geography > 2012 > 35 > 1-2 > 53-59

In the United States, black vulture (Coragyps atratus) and turkey vulture (Cathartes aura) pose significant birdstrike risks to aircraft. Understanding flight behaviors of vultures in and around military and civilian airfields is necessary to alleviate these risks. Using satellite telemetry data collected from 11 black vultures and 7 turkey vultures equipped with Global Positioning System backpack...

article

Historical records of passerine introductions to New Zealand fail to support the propagule pressure hypothesis

Michael P. Moulton, Wendell P. Cropper, Michael L. Avery

Biodiversity and Conservation > 2012 > 21 > 1 > 297-307

Blackburn et al. (Biodiver Conserv 20:2189–2199, 2011) claim that a reanalysis of passerine introductions to New Zealand supports the propagule pressure hypothesis. The conclusions of Blackburn et al. (2011) are invalid for three reasons: First, the historical record is so flawed that there is no sound basis for identifying the mechanisms behind extinction following introduction, or whether species...

article

A reassessment of historical records of avian introductions to Australia: no case for propagule pressure

Michael P. Moulton, Wendell P. Cropper, Linda E. Moulton, Michael L. Avery, more

Biodiversity and Conservation > 2012 > 21 > 1 > 155-174

Introduced species are widely believed to represent a significant threat to conservation of biological diversity. A better understanding of the ecological factors associated with successful species establishment should lead to improved management and mitigation of these introductions. The “propagule pressure hypothesis”, implying a greater chance of successful introduction with greater numbers introduced,...

article

A reassessment of the role of propagule pressure in influencing fates of passerine introductions to New Zealand

Michael P. Moulton, Wendell P. Cropper, Michael L. Avery

Biodiversity and Conservation > 2011 > 20 > 3 > 607-623

Several studies have argued that principal factor in determining the fate of bird introductions is introduction effort. In large part, these studies have emerged from analyses of historical records from a single place—New Zealand. Here we raise two concerns about these conclusions. First, we argue that although many bird species were introduced repeatedly to New Zealand, in many cases the introductions...

article

Genetic evidence for high propagule pressure and long‐distance dispersal in monk parakeet (Myiopsitta monachus) invasive populations

ANDERS GONÇALVES Da SILVA, JESSICA R. EBERHARD, TIMOTHY F. WRIGHT, MICHAEL L. AVERY, more

Molecular Ecology > 19 > 16 > 3336 - 3350

The monk parakeet (Myiopsitta monachus) is a successful invasive species that does not exhibit life history traits typically associated with colonizing species (e.g., high reproductive rate or long‐distance dispersal capacity). To investigate this apparent paradox, we examined individual and population genetic patterns of microsatellite loci at one native and two invasive sites. More specifically,...

article

The versatility of graded acoustic measures in classification of predation threats by the tufted titmouse Baeolophus bicolor: exploring a mixed framework for threat communication

Kathryn E. Sieving, Stacia A. Hetrick, Michael L. Avery

Oikos > 119 > 2 > 264 - 276

Many mammal and bird species respond to predator encounters with alarm vocalizations that generate risk‐appropriate responses in listeners. Two conceptual frameworks are typically applied to the information encoded in alarm calls and to associated anti‐predator behaviors. ‘Functionally referential’ alarm systems encode nominal classes or categories of risk in distinct call types that refer to distinct...

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Crop Protection (7)
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INFONA - science communication portal

Search results for: Michael L. Avery

Development of microsatellite loci for two New World vultures (Cathartidae)

Allowable take of black vultures in the eastern United States

Plant community shifts caused by feral swine rooting devalue Florida rangeland

Feral swine damage to globally imperiled wetland plant communities in a significant biodiversity hotspot in Florida

Limitations of population suppression for protecting crops from bird depredation: A review

Shared genetic diversity across the global invasive range of the monk parakeet suggests a common restricted geographic origin and the possibility of convergent selection

Detecting an elusive invasive species: a diagnostic PCR to detect Burmese python in Florida waters and an assessment of persistence of environmental DNA

Fine-scale, spatial and temporal assessment methods for feral swine disturbances to sensitive plant communities in south-central Florida

Weighing empirical and hypothetical evidence for assessing potential invasive species range limits: a review of the case of Burmese pythons in the USA

Avian mortality at communication towers in the United States and Canada: which species, how many, and where?

Is propagule size the critical factor in predicting introduction outcomes in passeriform birds?

Optimizing line intercept sampling and estimation for feral swine damage levels in ecologically sensitive wetland plant communities

Feral swine disturbance at important archaeological sites

An analytical framework for quantifying and testing patterns of temporal dynamics in social networks

Using three-dimensional flight patterns at airfields to identify hotspots for avian–aircraft collisions

Historical records of passerine introductions to New Zealand fail to support the propagule pressure hypothesis

A reassessment of historical records of avian introductions to Australia: no case for propagule pressure

A reassessment of the role of propagule pressure in influencing fates of passerine introductions to New Zealand

Genetic evidence for high propagule pressure and long‐distance dispersal in monk parakeet (Myiopsitta monachus) invasive populations

The versatility of graded acoustic measures in classification of predation threats by the tufted titmouse Baeolophus bicolor: exploring a mixed framework for threat communication

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