The Evolution Of Quantitative Sensitivity,
2022
University of Nebraska-Lincoln
The Evolution Of Quantitative Sensitivity, Margaret A H Bryer, Sarah E. Koopman, Jessica F. Cantlon, Steven T. Piantadosi, Evan L. Maclean, Joseph M. Baker, Michael J. Beran, Sarah M. Jones, Kerry E. Jordan, Salif Mahamane, Andreas Nieder, Bonnie M. Perdue, Friederike Range, Jeffrey R. Stevens, Masaki Tomonaga, Dorottya Ujfalussy, Jennifer Vonk
Jeffrey Stevens Papers & Publications
The ability to represent approximate quantities appears to be phylogenetically widespread, but the selective pressures and proximate mechanisms favouring this ability remain unknown. We analysed quantity discrimination data from 672 subjects across 33 bird and mammal species, using a novel Bayesian model that combined phylogenetic regression with a model of number psychophysics and random effect components. This allowed us to combine data from 49 studies and calculate the Weber fraction (a measure of quantity representation precision) for each species. We then examined which cognitive, socioecological and biological factors were related to variance in Weber fraction. We found contributions of phylogeny …
Activity Patterns Of The Del Norte Salamander (Plethodon Elongatus): Monitoring Plethodontid Behavior Using Pit Tag Surveys,
2022
Cal Poly Humboldt
Activity Patterns Of The Del Norte Salamander (Plethodon Elongatus): Monitoring Plethodontid Behavior Using Pit Tag Surveys, Sabrina Horrack
Cal Poly Humboldt theses and projects
Semi-fossorial plethodontid salamanders exhibit behavioral plasticity to avoid desiccation, retreating underground to shelter from adverse conditions such as low precipitation and high temperatures. In this study, I used passive integrated transponder (PIT) tag surveys to monitor this behavior in the Del Norte salamander (Plethodon elongatus), a small plethodontid native to northwestern California and southwestern Oregon. Within its range, a climatic gradient exists in which coastal areas experience milder temperatures and high precipitation, while inland areas tend to have colder winters, hotter summers, and lower precipitation. By monitoring the activity patterns of this species in inland and coastal areas, …
Northern Elephant Seal (Mirounga Angustirostris) Colony Establishment And Growth In The King Range National Conservation Area, California,
2022
Cal Poly Humboldt
Northern Elephant Seal (Mirounga Angustirostris) Colony Establishment And Growth In The King Range National Conservation Area, California, Emma Hatton Levy
Cal Poly Humboldt theses and projects
The King Range colony is the northernmost successful and expanding breeding site for northern elephant seals (Mirounga angustirostris). To evaluate the composition and growth of this colony, I conducted systematic surveys recording counts, age classes, births, and resighting seals with individually identifiable flipper tags. The timing of life-history events (breeding, molting, and resting) of all elephant seal sex and age groups at the King Range was consistent with observations at other colonies. Colony counts during breeding and molting have increased steadily over the 4-year study period (2018-2021), and pup production has increased by 87% since the first year …
Behavioral Differences In Urban Sciurus Carolinensis With Varying Human Exposure As A Model For Synanthropic Human-Animal Relationships,
2022
Eastern Washington University
Behavioral Differences In Urban Sciurus Carolinensis With Varying Human Exposure As A Model For Synanthropic Human-Animal Relationships, Tiffany M. Jordan
EWU Masters Thesis Collection
Synanthropic animals are considered a halfway point between wild and domestic animals that live in urban environments and depend on humans for their survival. Sciurus carolinensis, the eastern gray squirrel, symbolizes a distinctive coexistence between human and wildlife as they are commonly fed in parks and gardens. They are native to the eastern United States. Where they are invasive, they are found only in urban areas and not in rural or wildlife areas. This study examined how different levels of human exposure impact the behavior of S. carolinensis in its non-native range from two different perspectives by using flight initiation …
Wild Animal Welfare,
2022
Texas A & M University - College Station
Wild Animal Welfare, Clare Palmer, Peter Sandøe
Animal Sentience
Rowan et al’s article provides an overview of developments in the science of animal sentience and its links to animal welfare policy, especially regarding farm animals. But changing ideas of animal sentience and welfare are also important for managing wild and other free-living animals. We ask how the welfare of these animals differs from that of farmed animals, especially how the ability to make autonomous choices may matter. We suggest that more research into wild animal welfare is needed to make informed policy decisions, for example, about using animals in rewilding projects and choosing between policies of culling and fertility …
Spatio-Temporal Movement Patterns Of Sub-Adult Adfluvial Bull Trout,
2022
Central Washington University
Spatio-Temporal Movement Patterns Of Sub-Adult Adfluvial Bull Trout, Aimee Taylor
All Master's Theses
Bull Trout in the Yakima River basin of Washington are primarily adfluvial, often using managed lakes as habitat. Kachess Lake, composed of Big and Little Kachess Lakes, is managed by the Bureau of Reclamation (BOR) for water storage. BOR plans to build a structure that can withdraw an additional 200,000 acre-feet of water in drought years, which would disconnect the two basins for multiple years. This study examined the spatio-temporal movement of sub-adult Bull Trout in Kachess Lake to understand distribution patterns and the effects of environmental variables. We sought to answer 1) does time (week of the year), diel …
Mortality Risk Associated With Urban Land Use For Adult Eastern Diamondback Rattlesnakes (Crotalus Adamanteus),
2022
Marshall University
Mortality Risk Associated With Urban Land Use For Adult Eastern Diamondback Rattlesnakes (Crotalus Adamanteus), Mya Wiles
Theses, Dissertations and Capstones
Snakes have been a traditionally under-represented organism in urban ecology, but they face similar, if not greater challenges in the face of growing urban sprawl. Eastern diamondback rattlesnakes (Crotalus adamanteus, EDBs) are under consideration for listing under the Endangered Species Act due to population declines resulting from historical human persecution and habitat loss. This study used radio-telemetry data from a long-term monitoring project of adult EDBs on a developed sea island in South Carolina, USA. I reclassified a National Land Cover Dataset to reflect relative mortality risk for snakes attempting to move through the landscape. High-risk cover types …
Effects Of Release Techniques On Parent-Reared Whooping Cranes In
The Eastern Migratory Population,
2022
International Crane Foundation
Effects Of Release Techniques On Parent-Reared Whooping Cranes In The Eastern Migratory Population, Hillary L. Thompson, M. Susanna Glass, Marianne M. Wellington, Kim H. Boardman, Glenn H. Olsen
Proceedings of the North American Crane Workshop
Reintroduction of an Eastern Migratory Population (EMP) of whooping cranes (Grus americana) in the United States by release of captive-reared individuals began in 2001. As of 2020, the EMP has approximately 21 breeding pairs and has had limited recruitment of wild-hatched individuals, thus captive-reared juveniles continue to be released into breeding areas in Wisconsin to maintain the population. We investigated the effects of release techniques on survival, behavior, site fidelity, and conspecific associations of 42 captive-parent-reared whooping cranes released during 2013-2019 into the EMP. Individuals were monitored intensively post-release, then as a part of a long-term monitoring program, …
Observations Of Whooping Crane Parental Provisioning Of Chicks,
2022
U.S. Geological Survey
Observations Of Whooping Crane Parental Provisioning Of Chicks, Glenn H. Olsen
Proceedings of the North American Crane Workshop
Crane chicks are dependent on parent birds for provisioning during the first few months of life, but no study has examined this provisioning in detail. In 2014 research staff at the U.S. Geological Survey, Eastern Ecological Science Center (formerly Patuxent Wildlife Research Center), in Laurel, Maryland, made multiple observations of parent whooping cranes (Grus americana) feeding or interacting with their chick during the 3 months from hatching to fledging. Both parents participated in the feeding of the chick and only 1 chick was raised by each pair of parent whooping cranes. Initially feeding frequency was low (0-20 times …
The Impact Of Marking On Cranes: An Issue Paper,
2022
International Crane Foundation
The Impact Of Marking On Cranes: An Issue Paper, Anne E. Lacy, Barry K. Hartup, David A. Brandt
Proceedings of the North American Crane Workshop
As crane researchers and conservationists, our overarching objective is to learn and gather information about our study subjects while doing as little harm as possible. New technologies may be emerging too rapidly for researchers to assess the effectiveness or potential adverse effects of the devices, despite the ease and increasing accuracy of the information they provide. Researchers need to be able to gather information to answer various questions in a way that balances ethics and expense. With marking of cranes as a focal point, we discuss issues surrounding crane research based on various techniques, some health issues that are a …
Surveys And Population Estimates Of A Distinctive Subpopulation Of
Sandhill Cranes In The Fraser River Lowlands Of British Columbia,
2022
TerraFauna Wildlife Consulting, Inc.
Surveys And Population Estimates Of A Distinctive Subpopulation Of Sandhill Cranes In The Fraser River Lowlands Of British Columbia, Myles M. Lamont
Proceedings of the North American Crane Workshop
A poorly understood subpopulation of sandhill cranes (Grus canadensis) breeds at scattered locations in the lower Fraser River Valley on the south coast of British Columbia. The area also harbors the northernmost population of overwintering sandhill cranes anywhere in its range. While sporadic monitoring has been carried out since the mid-1960s, no formal survey efforts have been attempted for the entire Fraser River lowland subpopulation. During 2014-2019 we collected groundbased survey data on presence and occupation of territories within the study area; this effort was supported by citizen science contributions. On 20 June 2019, we flew a fixed-width, …
Whooping Crane Nest Building In Southwest Indiana,
2022
Indiana Division of Fish and Wildlife Mitchell Field Office
Whooping Crane Nest Building In Southwest Indiana, Amy J. Kearns, Hillary L. Thompson, Allisyn-Marie T. Y. Gillet
Proceedings of the North American Crane Workshop
The first documented case of whooping crane (Grus americana) nest building in Indiana is described. During spring 2015, a pair of whooping cranes did not leave their wintering grounds in Gibson County, Indiana, to return to their summering area in Wisconsin. Three nest platforms were discovered after the death of the female crane. To date, this is the only documented example of a whooping crane pair in the reintroduced Eastern Migratory Population (EMP) building nest platforms outside of Wisconsin. Although fidelity to the core nesting areas in Wisconsin is strong, and natal dispersal is usually <30 km, this example from Indiana shows that whooping cranes in the EMP may have the potential to pioneer nesting areas far outside of core reintroduction areas.
Mississippi Sandhill Crane Conservation Update 2017-2019,
2022
U.S. Fish and Wildlife Service
Mississippi Sandhill Crane Conservation Update 2017-2019, Scott G. Hereford, Angela J. Dedrickson
Proceedings of the North American Crane Workshop
To manage crane habitat on the Mississippi Sandhill Crane National Wildlife Refuge during 2017-2019, 5,822 ha were treated with prescribed burns, 648 ha of woody vegetation were removed, 97 ha of invasive plants were chemically treated, and 1.2 ha of crops were planted. Mississippi sandhill crane (Grus canadensis pulla) use responded to habitat treatment; 348 of 349 VHF radio locations were in treated areas. There were 316 target predators removed. Eighteen captive-reared juveniles were acclimated and released. We detected an average of 38 nests per year, including a record 40 nests in 2019. Fifteen chicks fledged in 2019, …
Summary Of Mortality Among Captive Cranes At The International
Crane Foundation: 2000-2020,
2022
International Crane Foundation
Summary Of Mortality Among Captive Cranes At The International Crane Foundation: 2000-2020, Barry K. Hartup, Robert Phillips
Proceedings of the North American Crane Workshop
We reviewed mortalities of captive cranes at the International Crane Foundation (ICF) between 2000 and 2020 to provide broad insights into contemporary factors affecting the collection’s health and survival. Sixty-three deaths were documented in 13 of 15 crane species held in the ICF collection. The mean annual mortality during the study was 2.6% and the mean age (±SD) at death was 28.4 (±12.7) years. The overall total number of deaths of males and females was similar, but there was an association between sex and death of adult versus geriatric (>25 years) cranes (P < 0.01); males were more likely to die at geriatric age than females. Deaths were commonly associated with chronic health and management problems (n = 44, 79%) versus …
Vigilance Of Nesting Whooping Cranes In Juneau County, Wisconsin,
2022
International Crane Foundation
Vigilance Of Nesting Whooping Cranes In Juneau County, Wisconsin, Nicole M. Gordon, Darby P. Bolt, Hillary L. Thompson
Proceedings of the North American Crane Workshop
Vigilance plays an important role in the detection of possible threats and reducing the risk of predation, including during the incubation period. We examined the visual vigilance of incubating whooping cranes (Grus americana) in Juneau County, Wisconsin, during the 2019 nesting season. We deployed 9 trail cameras and tagged crane presence and behavior in 32,801 photos which were used in our analysis. We assessed individual nest and environmental variables and their effects on vigilant behavior of incubating cranes using linear mixed-models. Vigilant behavior was defined by a posture in which the crane’s head was up, neck was erect, …
Florida Sandhill Crane Relocates Egg During Incubation,
2022
Fish and Wildlife Research Institute
Florida Sandhill Crane Relocates Egg During Incubation, Timothy A. Dellinger, Miranda L. Watford, Ronald R. Bielefeld
Proceedings of the North American Crane Workshop
Anecdotal accounts of birds moving their eggs to a new location have been reported in shorebirds, waterfowl, and woodpeckers. We report relocation of an egg, 2 days prior to hatching, by an adult Florida sandhill crane (Grus canadensis pratensis). We do not know why the egg was moved, but egg movement among other species appears to be associated with nest disturbance by humans, animals, or environmental conditions.
Initial Evaluation Of Cyclic Adenosine Monophosphate Enzyme
Immunoassay For Use With Crane Semen Samples,
2022
National Zoological Park
Initial Evaluation Of Cyclic Adenosine Monophosphate Enzyme Immunoassay For Use With Crane Semen Samples, Megan E. Brown, Kim Boardman, Katie L. Edwards
Proceedings of the North American Crane Workshop
The management of ex situ and in situ populations of many wildlife species requires detailed knowledge of a species’ reproductive biology. For species such as cranes, where artificial insemination is a critical component of ex situ management strategies, understanding normal sperm function is especially important. Previous research has shown that captive cranes exhibit highly variable production and quality of semen samples produced by individual males and high levels of variation of cell concentration and motility across different species. Cyclic adenosine monophosphate (cyclic AMP) has been implicated in regulating sperm function, such as cell motility, and may affect an individual’s ability …
Whooping Crane Stay Length In Relation To Stopover Site
Characteristics,
2022
Platte River Whooping Crane Maintenance Trust
Whooping Crane Stay Length In Relation To Stopover Site Characteristics, Andrew J. Caven, Aaron T. Pearse, David A. Brandt, Mary J. Harner, Greg D. Wright, David M. Baasch, Emma M. Brinley Buckley, Kristine L. Metzger, Matthew R. Rabbe,, Anne E. Lacy
Proceedings of the North American Crane Workshop
Whooping crane (Grus americana) migratory stopovers can vary in length from hours to more than a month. Stopover sites provide food resources and safety essential for the completion of migration. Factors such as weather, climate, demographics of migrating groups, and physiological condition of migrants influence migratory movements of cranes (Gruidae) to varying degrees. However, little research has examined the relationship between habitat characteristics and stopover stay length in cranes. Site quality may relate to stay length with longer stays that allow individuals to improve body condition, or with shorter stays because of increased foraging efficiency. We examined this …
How Stressful Is It To Move? Whooping Crane Glucocorticoid
Response During Facility Transfer,
2022
National Zoological Park
How Stressful Is It To Move? Whooping Crane Glucocorticoid Response During Facility Transfer, Megan E. Brown, Christopher Martin, Christopher Crowe, Sprina Lui, Nucharin Songsasen,
Proceedings of the North American Crane Workshop
The ability to transfer animals between different facilities for genetic management is a critical component to the success of any cooperatively managed captive animal population despite the high cost and the need for a high level of coordination in logistical planning. Two issues of concern are the magnitude of potential stress responses incurred during shipment of adult cranes to a new facility and the duration of elevated glucocorticoid production during the acclimation periods. The objectives of this project were to assess adrenal responses of whooping cranes (Grus americana) during transfer from the Patuxent Wildlife Research Center (PWRC) to …
Drivers Of Annual Fledging In The Mississippi Sandhill Crane
Population 1991-2018,
2022
University of New Orleans
Drivers Of Annual Fledging In The Mississippi Sandhill Crane Population 1991-2018, Henry W. Woolley, Scott G. Hereford, Jerome J. Howard,
Proceedings of the North American Crane Workshop
We studied trends in nesting, number of chicks fledged annually, and their environmental and biotic drivers in the wild population of Mississippi sandhill cranes (Grus canadensis pulla) on Mississippi Sandhill Crane National Wildlife Refuge during 1991-2018. Population size, number of nests, and number of chicks fledged annually increased slowly but significantly over the course of the study. Increases in population size were related to both number of wild-reared chicks fledged annually and number of captive-reared chicks released each year, but wild-reared chicks had significantly higher survivorship than captive-reared chicks. Hurricanes transiently raised mortality rates but only Hurricane Katrina …
