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Articles 241 - 270 of 4543

Full-Text Articles in Animal Sciences

Determining Species-Specific False-Positive Rates Using Visual And Auditory Cues: A Case Study With Sagebrush Steppe Songbirds, Amelia K. Evavold Jan 2023

Determining Species-Specific False-Positive Rates Using Visual And Auditory Cues: A Case Study With Sagebrush Steppe Songbirds, Amelia K. Evavold

Undergraduate Theses, Professional Papers, and Capstone Artifacts

Errors in wildlife field data threaten to bias resulting abundance and occupancy estimates if not properly accounted for or minimized. Methods to account for false-positive errors in wildlife data have not been as thoroughly developed as those for false-negative errors despite false-positives being present across diverse wildlife taxa and study systems. The calibration method to account for false-positives involves assessing the field detection method to determine how often false-positive errors occur in the field data. Rates can then be incorporated into estimations based on the field data to improve estimation accuracy. This study presents an application of the calibration approach …

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Habitat Use By Sandhill Cranes Wintering In The Agricultural Landscape Of The Sacramento–San Joaquin River Delta Of California, Gary L. Ivey, Bruce D. Dugger, Caroline P. Herziger, Michael L. Casazza, Joseph P. Fleskes Jan 2023

Habitat Use By Sandhill Cranes Wintering In The Agricultural Landscape Of The Sacramento–San Joaquin River Delta Of California, Gary L. Ivey, Bruce D. Dugger, Caroline P. Herziger, Michael L. Casazza, Joseph P. Fleskes

Proceedings of the North American Crane Workshop

The Sacramento–San Joaquin Delta region of California is an important wintering region for sympatric greater (Grus canadensis tabida) and lesser (G. c. canadensis) sandhill cranes. Basic information about sandhill crane use of habitats in their winter landscape is needed to design a biologically driven conservation strategy. We monitored a sample of radio-tagged birds of each subspecies for 2 winters and conducted foraging counts to document their habitat use. Cranes used the major crops and habitat types that were available in the landscapes surrounding their roost sites and focused most of their foraging in grain crops. We examined habitat selection surrounding …

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Whooping Crane Nesting Behavior, Parental Care, And Ecology At Wood Buffalo National Park, Andrew J. Caven, Michael J. Forsberg Jan 2023

Whooping Crane Nesting Behavior, Parental Care, And Ecology At Wood Buffalo National Park, Andrew J. Caven, Michael J. Forsberg

Proceedings of the North American Crane Workshop

We studied Whooping crane (Grus americana) nesting behavior and movement patterns at Wood Buffalo National Park using an instantaneous scan sampling approach. We also photo-documented important behavioral and ecological observations. Data were collected from 2 to 9 June 2023 from before 3:00 to after 22:00 hours. We completed 88 hours of observation and documented nest swapping about every 3.2 hours. The female incubated/brooded 3.3-10.9% more than the male, and the probability of incubation/brooding declined by 49% after the second chick began pipping and by 99% after both chicks had hatched. The eldest chick was successfully provisioned 16 hours and 33 …

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Inland Habitat Selection Model For Wintering Whooping Cranes, Karen Tyrell, Kristin Brightwell, Matthew Crane, Wade Harrell, Rosa Palmer, Aaron T. Pearse, Ted Owen Jan 2023

Inland Habitat Selection Model For Wintering Whooping Cranes, Karen Tyrell, Kristin Brightwell, Matthew Crane, Wade Harrell, Rosa Palmer, Aaron T. Pearse, Ted Owen

Proceedings of the North American Crane Workshop

Inland habitat use by wintering Aransas-Wood Buffalo whooping cranes (Grus americana) is expected to increase given projected population growth and observations of some whooping cranes using inland winter habitat in addition to coastal marshes. We developed resource utilization functions using ‘random forests’ to model whooping crane use as a function of environmental covariates considered important for whooping crane use. Covariates associated with distance to cropland, distance to development, and wetness or standing water were the most influential in model prediction. The model estimated that the 50% predicted use contour encompassed 34,925 hectares (ha) and the 95% predicted use contour encompassed …

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Mortality Of Fledged Whooping Cranes In The Aransas-Wood Buffalo Population, Kristin Brightwell, Matt Rabbe, Aaron T. Pearse, Ben Bainbridge, Karen Tyrell, Clayton Derby Jan 2023

Mortality Of Fledged Whooping Cranes In The Aransas-Wood Buffalo Population, Kristin Brightwell, Matt Rabbe, Aaron T. Pearse, Ben Bainbridge, Karen Tyrell, Clayton Derby

Proceedings of the North American Crane Workshop

Maintaining accurate mortality records for endangered species is important for guiding management and conservation actions. Mortalities of whooping cranes (Grus americana) in the Aransas-Wood Buffalo Population (AWBP) are documented in published records from 1950 through 2010. This paper documents publicly available records of known mortalities from 2011 through 2023, and updates historic records from 1950 to 2010. Public sightings and telemetry carcass records were restricted to fledged whooping cranes from the AWBP and stratified by confirmed, suspected, and unknown causes across the annual range (i.e., summer, migration, and winter). This mortality update provides more certainty associated with available carcass data …

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Differential Habitat Use Of Wintering Whooping Cranes Throughout The Range Of The Eastern Migratory Population, Hillary L. Thompson, Anne E. Lacy, Robert F. Baldwin, Patrick G. R. Jodice Jan 2023

Differential Habitat Use Of Wintering Whooping Cranes Throughout The Range Of The Eastern Migratory Population, Hillary L. Thompson, Anne E. Lacy, Robert F. Baldwin, Patrick G. R. Jodice

Proceedings of the North American Crane Workshop

In 2001, a reintroduced population of whooping cranes (Grus americana), the Eastern Migratory Population (EMP), was established in the eastern United States. There has been no assessment of habitat use of the EMP across the current winter distribution. During 2 winters, we used radio-telemetry to track groups of cranes each for 1 day. We grouped sites into 3 regions, based on natural clustering: north (Illinois, Indiana, Kentucky), central (Tennessee, Alabama), and south (Georgia, Florida, Louisiana). Home ranges decreased in size from north to south (4.9 ± 2.8, 3.1 ± 1.0, and 2.3 ± 0.5 km2, respectively). In the north and …

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Comparisons Of Migration Patterns Between Parent-Reared And Costume-Reared Whooping Cranes In The Eastern Migratory Population, 2012–2023, Mary Anderson, Glenn H. Olsen, Susie Dunham, Hillary L. Thompson, Marianne M. Wellington Jan 2023

Comparisons Of Migration Patterns Between Parent-Reared And Costume-Reared Whooping Cranes In The Eastern Migratory Population, 2012–2023, Mary Anderson, Glenn H. Olsen, Susie Dunham, Hillary L. Thompson, Marianne M. Wellington

Proceedings of the North American Crane Workshop

Whooping cranes (Grus americana) have been raised and released into the Eastern Migratory Population (EMP) since 2001. Cranes either were costume-reared and learned their migration route by following an ultralight aircraft, were costume-reared and released in fall near adult cranes (known as direct autumn release), or were parent-reared by captive adult whooping crane pairs and released in the fall near adult whooping cranes. Compared to costume-rearing, parent-rearing encourages conspecific learning prior to release, but needs further research to understand how it may influence post-release behaviors including migration. This study compared the migratory timing and length of parent-reared whooping cranes and …

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Temporal Patterns Of Sandhill Crane Use Of The Pecos River Valley, Chaves County, New Mexico, James B. Montgomery Jr. Jan 2023

Temporal Patterns Of Sandhill Crane Use Of The Pecos River Valley, Chaves County, New Mexico, James B. Montgomery Jr.

Proceedings of the North American Crane Workshop

The Pecos River Valley is an important stopover area for both migrating and wintering sandhill cranes (Grus canadensis) in southeastern New Mexico. The combination of shallow impoundments and a playa lake at Bitter Lake National Wildlife Refuge, off-refuge shallow ponds and riverine wetlands, and approximately 20,000 ha of nearby irrigated farmlands in Chaves County provided roosting and foraging areas used by the cranes. Once per week sandhill cranes were counted when departing their roosts during September through April 2005–2024. The fall migration during October and November peaked at 24,431 ± 204 (SE). During this peak period, cranes divided foraging between …

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Movement Of Eastern Migratory Whooping Cranes Outside The Nonessential Experimental Population Range, 2002–2024, Nicole M. Gordon, Eleanor A. Laack, Hannah R. Macinnes, Alicia M. Ward, Hillary L. Thompson Jan 2023

Movement Of Eastern Migratory Whooping Cranes Outside The Nonessential Experimental Population Range, 2002–2024, Nicole M. Gordon, Eleanor A. Laack, Hannah R. Macinnes, Alicia M. Ward, Hillary L. Thompson

Proceedings of the North American Crane Workshop

Whooping cranes (Grus americana) are listed as an endangered species under the Endangered Species Act (ESA), with 1 historic migratory population and multiple reintroduced populations. The reintroduced populations, including the Eastern Migratory Population (EMP), are considered nonessential experimental populations (NEP) under section 10j of the ESA. Within the boundaries of the NEP range, whooping cranes are treated with the protection of a threatened species on federal lands but are treated as a species under consideration for listing on private lands. However, if an individual exits the NEP range, they are treated as federally endangered and have the full protections of …

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Proceedings Of The Sixteenth North American Crane Workshop: Abstracts, Megan E. Brown, Barry K. Hartup, Jane E. Austin Jan 2023

Proceedings Of The Sixteenth North American Crane Workshop: Abstracts, Megan E. Brown, Barry K. Hartup, Jane E. Austin

Proceedings of the North American Crane Workshop

Following is a list of all abstracts of presentations given at the 16th North American Crane Workshop (2023), some of which were not published in these Proceedings.

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Proceedings Of The Sixteenth North American Crane Workshop, 23–26 October 2023, Baraboo, Wisconsin, Cover And Frontmatter, Megan E. Brown, Barry K. Hartup, Jane E. Austin Jan 2023

Proceedings Of The Sixteenth North American Crane Workshop, 23–26 October 2023, Baraboo, Wisconsin, Cover And Frontmatter, Megan E. Brown, Barry K. Hartup, Jane E. Austin

Proceedings of the North American Crane Workshop

Cover and frontmatter for the Proceedings of the Sixteenth North American Crane Workshop held October 23–26, 2023 in Baraboo, Wisconsin. Includes the preface by the editors, in memoria for M. Cathy Nowak (1955–2023) and Geroge F. Gee (1937–2022), and the contents.

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Bird Articulation Guide, Kelsey Blaze Miller Jan 2023

Bird Articulation Guide, Kelsey Blaze Miller

Undergraduate Theses, Professional Papers, and Capstone Artifacts

No abstract provided.

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Effects Of Forest Reclamation And Landscape Features On Avian Occupancy, Species Richness, And Abundance In Appalachia, Rebecca N. Davenport Jan 2023

Effects Of Forest Reclamation And Landscape Features On Avian Occupancy, Species Richness, And Abundance In Appalachia, Rebecca N. Davenport

Theses and Dissertations--Forestry and Natural Resources

The Forestry Reclamation Approach (FRA) is a recently developed coal mining reclamation method that emphasizes best management practices in forestry, such as the planting of native trees and shrubs. Although the FRA is expected to benefit wildlife, no studies have empirically examined the effects of the FRA on avian species. My study aimed to identify which reclamation approaches and/or landscape features promote breeding songbirds, particularly mature forest avian guilds and species of conservation need. I conducted point count surveys in the Appalachian Mountains of eastern West Virginia and assessed differences in avian occupancy, species richness, and species abundance between four …

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Effects Of Landscape Configuration Metrics On American Barn Owl Nest Box Occupancy And Hunting, Samantha D. Chavez Jan 2023

Effects Of Landscape Configuration Metrics On American Barn Owl Nest Box Occupancy And Hunting, Samantha D. Chavez

Cal Poly Humboldt theses and projects

Harnessing ecosystem services, broadly defined as the benefits nature gives to people, is one approach to minimize the widespread negative impacts of agriculture on wildlife and biodiversity conservation. Conservation biological control is one such service that aims to use natural enemies to reduce crops losses from pests without the use of harmful pesticides, including rodenticides. In Napa Valley, California, human-made nest boxes are deployed on wine grape vineyards to attract barn owls (Tyto furcata) that depredate and remove thousands of rodent pests throughout the nesting season. However, the provisioning of this ecosystem service depends on whether a box …

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Timing Of Diversification, Dispersal, And Biogeography Of Parrots In The Genus Amazona (Psittaciformes: Psittacidae) Throughout The Caribbean, Visualized In Gis, Christopher Kingwill Jan 2023

Timing Of Diversification, Dispersal, And Biogeography Of Parrots In The Genus Amazona (Psittaciformes: Psittacidae) Throughout The Caribbean, Visualized In Gis, Christopher Kingwill

Master's Theses or Doctor of Nursing Practice

Avian fossil records from across the Caribbean (Greater and Lesser Antilles) demonstrate higher avian diversity prior to extinction events due to climate change at the end of the Pleistocene and human impact across the Caribbean throughout the Holocene. Amazon parrots (Amazona) are a diverse genus of New World parrots found throughout Central and South America, as well as the Caribbean. Their phylogeny and evolutionary history, specifically for Caribbean species, has been debated in terms of source areas in Central and South America and the timing of and number of colonization events to different islands that preceded diversification into …

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Relationships Between Behavior, Energy Metabolites, And Corticosterone In Black-Legged Kittiwake (Rissa Tridactyla) Nestlings, Sierra Pete Jan 2023

Relationships Between Behavior, Energy Metabolites, And Corticosterone In Black-Legged Kittiwake (Rissa Tridactyla) Nestlings, Sierra Pete

Master’s Theses

Birds can cope with energy-shifting challenges by redirecting energy and behavior to maintain energetic homeostasis. Nestlings allocate energy to support their rapid growth and developmental period; thus, their challenges and the subsequent energetic demands can be much different than an adult. At a baseline level, energy is constantly shifting in response to regularly occurring challenges; however, more substantial challenges can initiate the production of glucocorticoid hormones. In birds, the main glucocorticoid is corticosterone. Corticosterone is believed to aid in energy homeostasis by redirecting energy metabolite mobilization. Energy metabolites are intermediaries or end products of cellular metabolism, thus, metabolites like glucose …

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Estimating Northern Spotted Owl (Strix Occidentalis Caurina) Pair Detection Probabilities Based On Call-Back Surveys Associated With Long-Term Mark-Recapture Studies, 1993–2018, Katie M. Dugger, Alan B. Franklin, Damon B. Lesmeister, Raymond J. Davis, J. David Wiens, Gary C. White, James D. Nichols, James E. Hines, Charles B. Yackulic, Carl J. Schwarz, Steven A. Ackers, L. Steven Andrews, Larissa L. Bailey, Robin Bown, Jesse Burgher, Kenneth P. Burnham, Peter C. Carlson, Tara Chestnut, Mary M. Conner, Krista E. Dilione, Eric D. Forsman, Scott A. Gremel, Keith A. Hamm, Dale R. Herter, J. Mark Higley, Rob B. Horn, Julianna M. Jenkins, William L. Kendall, David W. Lapmphear, Christopher Mccafferty, Trent L. Mcdonald, Janice A. Reid, Jeremy T. Rockweit, David C. Simon, Stan G. Sovern, James K. Swingle, Heather Wise Jan 2023

Estimating Northern Spotted Owl (Strix Occidentalis Caurina) Pair Detection Probabilities Based On Call-Back Surveys Associated With Long-Term Mark-Recapture Studies, 1993–2018, Katie M. Dugger, Alan B. Franklin, Damon B. Lesmeister, Raymond J. Davis, J. David Wiens, Gary C. White, James D. Nichols, James E. Hines, Charles B. Yackulic, Carl J. Schwarz, Steven A. Ackers, L. Steven Andrews, Larissa L. Bailey, Robin Bown, Jesse Burgher, Kenneth P. Burnham, Peter C. Carlson, Tara Chestnut, Mary M. Conner, Krista E. Dilione, Eric D. Forsman, Scott A. Gremel, Keith A. Hamm, Dale R. Herter, J. Mark Higley, Rob B. Horn, Julianna M. Jenkins, William L. Kendall, David W. Lapmphear, Christopher Mccafferty, Trent L. Mcdonald, Janice A. Reid, Jeremy T. Rockweit, David C. Simon, Stan G. Sovern, James K. Swingle, Heather Wise

United States Department of Agriculture Wildlife Services: Staff Publications

The northern spotted owl (Strix occidentalis caurina; hereinafter NSO) was listed as “threatened” under the Endangered Species Act in 1990 and population declines have continued since that listing. Given the species’ protected status, any proposed activities on Federal lands that might impact NSO require consultation with U.S. Fish and Wildlife Service and part of that consultation often includes surveys to determine presence and occupancy status of the species in the proposed activity area. The objective of this report is to present study-area specific estimates of the probability of detection for NSO pairs from twelve 2-week seasonal survey periods …

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Advancing Methods Of Diet Analysis: A Case Study Using Degraded Merlin (Falco Columbarius) Prey Remains, Taylor A. Coon Jan 2023

Advancing Methods Of Diet Analysis: A Case Study Using Degraded Merlin (Falco Columbarius) Prey Remains, Taylor A. Coon

Undergraduate Theses, Professional Papers, and Capstone Artifacts

Prey remains have long been used as a mechanism to approach diet analyses. As understanding diet is key to comprehending ecosystem dynamics, prey remains identification requires a unique methodological approach to determine diversity within a sample. With the advancement of technology, molecular protocols designed for species-specific identification have improved to incredible accuracy and precision. Yet, the visual identification method has remained a predominant technique within diet studies. With entry-level observers, we matched visual identifications with molecular-based methods to quantify the accuracy of the visual identification method. This study determined what fraction of visually identified prey remains could be correctly identified …

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An Unmanned Aircraft System For Marking Live Power Lines To Prevent Bird Collisions, Mattheuns D. Pretorius, Lourens Leeuwner, Kaajial Durgapersad, Constant Hoogstad, Peter Beckedahl, Michael D. Michael, Kishaylin Chetty Jan 2023

An Unmanned Aircraft System For Marking Live Power Lines To Prevent Bird Collisions, Mattheuns D. Pretorius, Lourens Leeuwner, Kaajial Durgapersad, Constant Hoogstad, Peter Beckedahl, Michael D. Michael, Kishaylin Chetty

Human–Wildlife Interactions

Collisions with overhead power lines represent a significant cause of mortality for a number of large bird species worldwide. Certain threatened species are severely impacted by power line collisions, particularly those for which there are no other known significant threats. In South Africa, bird collisions with overhead power line cables, including collisions with phase conductors and shield wires, contribute significantly to annual threatened bird species mortalities associated with Eskom power lines. The most practical mitigation measure is to attach bird anti-collision devices as markers on the cables. Current marking methods involve installations by hand, where linemen are hoisted up to …

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The Role Of Interspecific Competition In The Range Collapse Of A Songbird After Rapid Range Expansion, Zachary H. Vickers Jan 2023

The Role Of Interspecific Competition In The Range Collapse Of A Songbird After Rapid Range Expansion, Zachary H. Vickers

Graduate Theses/Dissertations

There is a wealth of evidence demonstrating interspecific competition in birds, but often this evidence is localized and may or may not entirely explain range dynamics over large geographic extents. Bewick’s Wrens (Thrymanes bewickii) and House Wrens (Troglodytes aedon) are small passerine birds of the family Troglodytidae. Previous experimental evidence has demonstrated that Bewick’s Wrens suffer from asymmetric interference competition from House Wrens in Kansas, and this evidence has been cited as the likely reason for the historically recent range collapse of the Bewick’s Wren. However, I argue that localized experimental evidence is insufficient to explain abundance trends over large …

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Assessing Forest Features And Nocturnal Flying Insect Diversity As Predictors Of Eastern Whip-Poor-Will Occupancy In Foraging Habitat, Clark D. Alexander Jan 2023

Assessing Forest Features And Nocturnal Flying Insect Diversity As Predictors Of Eastern Whip-Poor-Will Occupancy In Foraging Habitat, Clark D. Alexander

Graduate Theses, Dissertations, and Problem Reports (ETD)

Eastern whip-poor-will (Antrostomus vociferus), an insectivorous caprimulgid, have seen an approximate 2.76% annual population decrease since the 1960s, with their breeding and foraging ecology largely unknown due to their nocturnal and cryptic behavior. I conducted research to assess abiotic and biotic variables correlated with detection, and occupancy probability, and prey species diversity on ~104,000 hectares of forest in West Virginia, owned by the private timber company Weyerhaeuser. Previous literature indicates that Eastern whip-poor-will, and their prey, require ephemeral habitat such as recently cleared and early successional forests, like those historically created by forest fires, wind shears, hurricanes, and …

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Effects Of Climate Change And Landscape-Scale Forest Management On Avian Communities, Abundance, And Nest Success In The Appalachian Mountains, Hannah L. Clipp Jan 2023

Effects Of Climate Change And Landscape-Scale Forest Management On Avian Communities, Abundance, And Nest Success In The Appalachian Mountains, Hannah L. Clipp

Graduate Theses, Dissertations, and Problem Reports (ETD)

Birds are integral components of ecosystems and account for billions of dollars in tangible benefits to humans. As such, recent continental declines of bird species have ecological and economic consequences, providing the impetus for my dissertation research. I identified knowledge gaps and proposed novel questions about how birds in the Appalachian Mountains are influenced by changing environmental conditions due to climate change and forest management. The Appalachian Mountains encompass an important biogeographical region with high conservation value due to its myriad habitats and corresponding bird species diversity. Thus, there is a critical need to evaluate the effects of shifting climate …

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An Analysis Of Department Of The Air Force Bird Strikes And Precipitation, Jason Powell Mas, Cfmei, Atp Jan 2023

An Analysis Of Department Of The Air Force Bird Strikes And Precipitation, Jason Powell Mas, Cfmei, Atp

International Journal of Aviation, Aeronautics, and Aerospace

This study explored the relationship between precipitation, the amount of time between precipitation events, bird strike risk, and the agricultural zone related to Department of the Air Force (DAF) aircraft operations. Certain bird species demonstrated a relationship between agricultural zones, precipitation, and length of time after a precipitation event and when an aircraft strike occurred. The types and frequency of bird strikes depend highly on the region and species struck. The Poisson regression revealed Cathartiformes as significantly struck by the DAF aircraft more often and can be predicted based on agricultural zone and precipitation. A binary regression did not demonstrate …

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Tradeoffs May Counteract Effects Of Telecommunication Towers On Osprey Nesting, Gage R. Barnes, Kate G. Slankard, John B. Hewlett, Andrea K. Darracq Jan 2023

Tradeoffs May Counteract Effects Of Telecommunication Towers On Osprey Nesting, Gage R. Barnes, Kate G. Slankard, John B. Hewlett, Andrea K. Darracq

Human–Wildlife Interactions

The number of telecommunication towers (TCTs) throughout the United States has and continues to increase exponentially. Increased TCT placement has been implicated in local population increases in platform nesting birds such as ospreys (Pandion haliaetus). However, osprey use of artificial structures can cause conflicts with humans because of economic costs and risks to human safety. Managers require better information regarding the effect of artificial nesting surfaces, such as TCTS, on osprey reproduction to make informed decisions regarding species conservation and to mitigate potential conflicts. The objective of our study was to evaluate the influence of TCTs on osprey …

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Effectiveness Of Citizen Engagement In A State Agency Egg-Oiling Program To Reduce Urban Canada Goose Populations And Conflicts, Charles H. Cope, Tom F. Bidrowski, Jon P. Beckmann Jan 2023

Effectiveness Of Citizen Engagement In A State Agency Egg-Oiling Program To Reduce Urban Canada Goose Populations And Conflicts, Charles H. Cope, Tom F. Bidrowski, Jon P. Beckmann

Human–Wildlife Interactions

In many cases, urban environments create high-quality habitat for wildlife that may allow species to form commensal relationships with humans. Positive impacts of urban environments (e.g., high-quality nesting habitat) may enhance survival and/or increased fecundity. One species that has shown the ability to form commensal relationships with humans in urban environments is Canada geese (Branta canadensis). Canada goose populations have continued to rebound in Kansas, USA, and across the Great Plains, such that the estimated resident population in Wichita, Kansas, grew from 0 to >5,000 resident geese and the over-winter population increased from 1,600 in 1997 to >18,000 …

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A Return To The Staging Grounds: Reassessment Of Aleutian Cackling Goose Spring Distribution In North Humboldt Bay, Shaun W. Thornton Jan 2023

A Return To The Staging Grounds: Reassessment Of Aleutian Cackling Goose Spring Distribution In North Humboldt Bay, Shaun W. Thornton

Cal Poly Humboldt theses and projects

After a 15-year interval in research, spatial and temporal patterns of the Aleutian cackling goose during spring staging was assessed again in 2022. During my study, 3,389 goose flocks were recorded in Arcata Bottoms staging site, 1 January to 21 April 2022, amounting to an estimated total of 2,248,512 goosedays, which was 336.8% higher than 2007 estimates of 667,485 goosedays. Geese continued to use pastures with a wide range of landscape characteristics primarily represented by livestock grazing practices. Goose use was greater than availability on beef-cattle fields early in the season and dairy-cow fields later in the season. Human disturbances …

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Ecological Diagnosis And Diversity Structure Of The Forest Birds Community In Machroha Forest (Souk Ahras – Northeastern Algeria), Abdelhak Boucif, Mouslim Bara, Moussa Houhamdi Dec 2022

Ecological Diagnosis And Diversity Structure Of The Forest Birds Community In Machroha Forest (Souk Ahras – Northeastern Algeria), Abdelhak Boucif, Mouslim Bara, Moussa Houhamdi

Journal of Bioresource Management

Machroha forest is a large hot spot of biodiversity of northeastern region of Algeria. It is dominated by several species of oak tree that can contribute to the conservation of many animals such as birds. Our study was carried out from February 2019 to July 2021, in order to diagnosis the ecological status of forest birds and their dynamics. Our results reported that this forest was including 19.21% of the Algerian avifauna diversity. We recorded 78 species of birds classified in 32 families. The main species were sedentary with an insectivorous trophic categories and terrestrial guild. Three species observed in …

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First Case Of Leucism In The House Bunting Emberiza Sahari In Algeria, Abdelwahab Chedad, Djamel Bendjoudi, Brahim Beladis, Omar Guezoul Dec 2022

First Case Of Leucism In The House Bunting Emberiza Sahari In Algeria, Abdelwahab Chedad, Djamel Bendjoudi, Brahim Beladis, Omar Guezoul

Journal of Bioresource Management

Continue to monitor the bioecology of the House bunting in Algeria and mentioned the birds that carry abnormalities and genetic mutation (Albinism and leucism), including passerines species. A male House bunting Emberiza sahari with leucism (partial albinism) was recorded on December 6, 2021, in the city center of the M'Zab Valley at Ghardaïa (Algerian Sahara).

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Eavesdropping On Animals: Can Bioacoustics Help Save Species?, Zoe Grueskin Dec 2022

Eavesdropping On Animals: Can Bioacoustics Help Save Species?, Zoe Grueskin

Capstones

Around the world, scientists are using sound to study the natural world in a growing field called bioacoustics. Researchers are eavesdropping on frogs and fish, elephants and earthworms, and many hope what they hear can inform and inspire conservation action around the world. From the field’s auspicious beginning with accidentally-recorded whales, to researchers today listening to locations as diverse as the Arctic seafloor and India’s Western Ghats mountain range, this capstone project explores the potential — and limitations — of conservation bioacoustics. Read the story, see photos and listen to audio pieces featuring three bioacousticians and their field recordings here: …

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A Subspecies-Level Database Of Amazonian Bird Distributions, With Inferences On Suture Zones And Conservation, Marco Antonio Rego Dec 2022

A Subspecies-Level Database Of Amazonian Bird Distributions, With Inferences On Suture Zones And Conservation, Marco Antonio Rego

LSU Doctoral Dissertations

Amazonia has the largest and most biodiverse tropical forest on the planet. However, the distributions of its species are still poorly understood, even for well-studied vertebrates such as birds. Available distribution maps for Amazonian birds often lack accuracy in delimiting the area where species occur. Existing distributional information for Amazonian birds is often limited to species-level level taxonomy, even though many Amazonian bird subspecies represent biological species. Here, I investigate the geographic distributions of 4,148 bird taxa (species and subspecies) using museum scientific specimens as the primary source of data. To build the data base I use more than 600,000 …

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