Amy Yackel Adams, PhD
Amy Yackel Adams is a Research Ecologist focusing on improving management decisions of invasive reptiles worldwide.
Amy leads a diverse research program with other USGS scientists and various collaborators (NPS, USDA-NWRC, USFWS, DoD, universities, and state agencies) pertaining to early detection and rapid response, biology, ecology, genetics, control tool evaluation, eradication, and quantitative model development to improve adaptive management of invasive reptile species. Yackel Adams’ research areas in the Greater Everglades Ecosystem and Pacific Islands include: 1) Population and vital rate estimation of invasive Burmese Pythons, Veiled Chameleons, and Brown Treesnakes; 2) Estimating the impact of Brown Treesnakes on prey populations; 3) Enhancing early detection of invasive reptiles using new tools; and 4) Development and evaluation of removal and abundance models to inform and optimize eradication efforts.
Education and Certifications
PhD, Ecology, Graduate Degree Program in Ecology, Colorado State University, 2005
MS, Ecology, Graduate Degree Program in Ecology, Colorado State University, 1999
BS, Resource Conservation and Environmental Studies, University of Montana, 1986
Science and Products
Filter Total Items: 17
Filter Total Items: 45
Dataset from 2015-2016 thermal and behavior monitoring of Argentine giant tegus in Everglades, Florida Dataset from 2015-2016 thermal and behavior monitoring of Argentine giant tegus in Everglades, Florida
Thermal data collected from iButton temperature loggers implanted into research animals (Argentine giant tegus) and in their surrounding environment. Tegus undergo winter dormancy (hibernation) to cope with colder temperatures, and we studied the thermal habits of wild tegus within their invaded range in southern Florida, USA. We used radiotelemetry and trail cameras to verify dates of...
Visual Surveys Rapid Response Saipan 2016 Visual Surveys Rapid Response Saipan 2016
Nocturnal visual encounter survey data conducted by 29 searchers over 17 transects obtained during a Brown Treesnake rapid response deployment to island of Saipan in 2016. Surveys took place in the vicinity of the Saipan airport and Dandan village (ca. 15.127°N, 145.735°E) from 06 January to 13 March 2016, 6-7 nights/week but with a break in surveying from 26 January through 21 February...
Airsoft electric gun evaluation on Brown Treesnakes, Guam, 2016 Airsoft electric gun evaluation on Brown Treesnakes, Guam, 2016
The data set consists of 2 spreadsheets from Airsoft Electric Gun (AEG) trials on brown treesnakes. AEG snake wound data contains AEG results from guns equipped with 0.39 gram ammunition (plastic pellets ) that were fired at dead and live snakes from distances of 4, 8, and 12 m to measure tissue-penetration depth, and noted if (a) the pellet was lodged inside the peritoneal cavity, (b)...
Failed Brown Treesnake bait cartridges from an aerially application in Guam, 2018 Failed Brown Treesnake bait cartridges from an aerially application in Guam, 2018
The dataset contains 6 columns of data collected during line transect surveys (Line) that evaluated bait cartridge efficacy for Brown Treesnake control on Guam. Two-person teams recorded all bait cartridges observed while walking the center line of transects in the Habitat Management Unit (HMU). Perpendicular distance (DIST (m)) to cartridges from center line was measured to the nearest...
Brown Treesnake counts during visual encounter surveys at three walking paces, Guam 2016 Brown Treesnake counts during visual encounter surveys at three walking paces, Guam 2016
We evaluated three walking paces to estimate (1) how snake detection rate per unit distance changes with increasing pace, and (2) how total number of snakes found by the end of a night of surveying varies with pace when the amount of surveying time per night is held constant. For a ?fast? pace we searched the 220 meter-long transect in 10 minutes, corresponding to a walking pace of 1.32...
Brown Treesnake visual survey and radiotelemetry data, Guam 2015 Brown Treesnake visual survey and radiotelemetry data, Guam 2015
The dataset consists of two spreadsheets that contain brown treesnake data (location, perch taxa, perch height, time of detection, whether visible or not, and size of snake) collected during both visual surveys and radio telemetry within a 55-ha enclosure on Guam.
Removal count data of Veiled Chameleons on Maui, 2002-2012 Removal count data of Veiled Chameleons on Maui, 2002-2012
The data set consists of 3 spreadsheets: counts, efforts, and location that detail the 10-year removal effort of invasive Veiled Chameleons (Chamaeleo calyptratus) on the island of Maui. Recorded are the number of lizards removed from each site, the level of search effort at each site, and the centroid location of each sampled site.
Habitat characterization around standard brown treesnake traps on Guam, 2004 - 2017 Habitat characterization around standard brown treesnake traps on Guam, 2004 - 2017
Data were collected in association with locations of standard brown treesnake traps on Guam at location prior to suppression or control efforts and after control had occurred. In all cases study sites were closed or semi-closed populations of brown treesnakes. Habitat data focused on type and structure of the habitat within 10-m of the trap.
Dataset: Passive restoration following ungulate removal in a highly disturbed tropical wet forest devoid of native seed dispersers Dataset: Passive restoration following ungulate removal in a highly disturbed tropical wet forest devoid of native seed dispersers
On an island largely devoid of native vertebrate seed dispersers, we monitored forest succession for seven years following ungulate exclusion from a 5-hectare area and adjacent plots with ungulates still present. The study site was in northern Guam on Andersen Air Force Base (1337N, 14451E) and situated on a coralline limestone plateau. We established 22 plots and six 0.25-m2 subplots to...
Filter Total Items: 101
Face-off: Novel depredation and nest defense behaviors between an invasive and a native predator in the Greater Everglades Ecosystem, Florida, USA Face-off: Novel depredation and nest defense behaviors between an invasive and a native predator in the Greater Everglades Ecosystem, Florida, USA
We describe several photo-documented novel interactions between intraguild predators in southern Florida—the native bobcat (Lynx rufus) and the invasive Burmese python (Python bivittatus). Over several days we documented a bobcat's depredation of an unguarded python nest and subsequent python nest defense behavior following the return of both animals to the nest. This is the first...
Authors
Andrea Faye Currylow, Matthew F. McCollister, Gretchen Erika Anderson, Jillian Maureen Josimovich, Austin Lee Fitzgerald, Christina M. Romagosa, Amy A. Yackel Adams
Individual heterogeneity influences the effects of translocation on urban dispersal of an invasive reptile Individual heterogeneity influences the effects of translocation on urban dispersal of an invasive reptile
Background Invasive reptiles pose a serious threat to global biodiversity, but early detection of individuals in an incipient population is often hindered by their cryptic nature, sporadic movements, and variation among individuals. Little is known about the mechanisms that affect the movement of these species, which limits our understanding of their dispersal. Our aim was to determine...
Authors
Abigail B. Fueka, Melia G. Nafus, Amy A. Yackel Adams, Larissa L. Bailey, Mevin B. Hooten
Can we prove that an undetected species is absent? Evaluating whether brown treesnakes are established on the island of Saipan using surveillance and expert opinion Can we prove that an undetected species is absent? Evaluating whether brown treesnakes are established on the island of Saipan using surveillance and expert opinion
Detection of invasive species and decisions centered around early detection and rapid response (EDRR) are notorious challenges for decision makers. Detection probability is low for cryptic species, resources are limited, and ecological harm (especially for island ecosystems) can result from failure to remove invasive species due to inadequate or delayed surveillance efforts. Due to the...
Authors
Amy A. Yackel Adams, Patrick D Barnhart, Gordon H. Rodda, Eric T. Hileman, Melia Gail Nafus, Robert Reed
Agkistrodon conanti (Florida Cottonmouth) and Python bivittatus (Burmese Python). Diet and Predation Agkistrodon conanti (Florida Cottonmouth) and Python bivittatus (Burmese Python). Diet and Predation
Python bivittatus is established in the Greater Everglades Ecosystem in southern Florida, USA. Documented predators on pythons in Florida include Alligator mississippiensis (American Alligator; Snow et al. 2006. Herpetol. Rev. 37:81–81), Drymarchon couperi (Gulf Coast Indigo Snake; Andreadis et al. 2018. Herpetol. Rev. 49:341–342), Lynx rufus (Bobcat; McCollister et al. 2021. Southeast...
Authors
Ian A. Bartoszek, Gretchen Erika Anderson, Ian Easterling, Jillian Maureen Josimovich, Alex Furst, Frank N. Ridgley, Austin Lee Fitzgerald, Amy A. Yackel Adams, Andrea Faye Currylow
Demographic response of brown treesnakes to extended population suppression Demographic response of brown treesnakes to extended population suppression
From a management perspective, reptiles are relatively novel invasive taxa. Few methods for reptile control have been developed and very little is known about their effectiveness for reducing reptile populations, particularly when the goal is eradication. Many reptiles, and especially snakes, are cryptic, secretive, and undergo extended periods of inactivity, traits that decrease...
Authors
Melia G. Nafus, Shane R. Siers, Brenna A. Levine, Zachary C. Quiogue, Amy A. Yackel Adams
Tools for increasing visual encounter probabilities for invasive species removal: A case study of brown treesnakes Tools for increasing visual encounter probabilities for invasive species removal: A case study of brown treesnakes
Early detection and rapid response (EDRR) are essential to identifying and decisively responding to the introduction or spread of an invasive species, thus avoiding population establishment and improving the probability of achieving eradication. However, detection can be challenging at the onset of a species invasion as low population densities can reduce detection probability and...
Authors
Staci M. Amburgey, Amy A. Yackel Adams, Beth Gardner, Bjorn Lardner, Sarah J. Converse
Olfactory lures in predator control do not increase predation risk to birds in areas of conservation concern Olfactory lures in predator control do not increase predation risk to birds in areas of conservation concern
Context: Lethal control of predators is often undertaken to protect species of conservation concern. Traps are frequently baited to increase capture efficacy, but baited traps can potentially increase predation risk by attracting predators to protected areas. This is especially important if targeted predators can escape capture due to low trap success. Snake traps using live mouse lures...
Authors
Page E. Klug, Amy A. Yackel Adams, Robert Reed
Female persistence during toxicant treatment predicts survival probability of offspring in invasive brown treesnakes (Boiga irregularis) Female persistence during toxicant treatment predicts survival probability of offspring in invasive brown treesnakes (Boiga irregularis)
Assessing the long-term efficacy of control methods is a critical component of invasive species management. For example, if traits related to control have significant heritability or are influenced by maternal effects, control methods may lose efficacy over time. The potential for these effects can be evaluated via parent/offspring survival analysis, which concomitantly recasts adaptive...
Authors
Brenna A Levine, Amy A. Yackel Adams, Marlis Douglas, Michael Douglas, Melia Gail Nafus
Foraging behavior in a generalist snake (brown treesnake, Boiga irregularis) with implications for avian reintroduction and recovery Foraging behavior in a generalist snake (brown treesnake, Boiga irregularis) with implications for avian reintroduction and recovery
Broad foraging classifications, such as generalist or specialist forager, are generally beneficial for population management in defining expectations of typical behavior. However, better understanding as to how individual variance in behavior interfaces with management actions, such as control of an invasive predator (such as brown treesnakes; Boiga irregularis) responsible for...
Authors
Melia G. Nafus, Peter X. Xiong, Eben H. Paxton, Amy A. Yackel Adams, Scott Michael Goetz
Thermal stability of an adaptable, invasive ectotherm: Argentine giant tegus in the Greater Everglades ecosystem, USA Thermal stability of an adaptable, invasive ectotherm: Argentine giant tegus in the Greater Everglades ecosystem, USA
Invasive species globally threaten biodiversity and economies, but the ecophysiological mechanisms underlying their success are often understudied. For those alien species that also exhibit high phenotypic plasticity, such as habitat generalists, adaptations in response to environmental pressures can take place relatively quickly. The Argentine giant tegu (Salvator merianae; tegu) is a...
Authors
Andrea Faye Currylow, Michelle Collier, Emma B. Hanslowe, Bryan G. Falk, Brian S. Cade, Sarah E. Moy, Alejandro Grajal-Puche, Frank N. Ridgley, Robert Reed, Amy A. Yackel Adams
Brown treesnake mortality after aerial application of toxic baits Brown treesnake mortality after aerial application of toxic baits
Quantitative evaluation of control tools for managing invasive species is necessary to assess overall effectiveness and individual variation in treatment susceptibility. Invasive brown treesnakes (Boiga irregularis) on Guam have caused severe ecological and economic effects, pose a risk of accidental introduction to other islands, and are the greatest impediment to the reestablishment of
Authors
Scott Michael Goetz, Eric T. Hileman, Melia G. Nafus, Amy A. Yackel Adams, Amanda R Bryant, Robert Reed, Shane R. Siers
Evaluation of camera trap-based abundance estimators for unmarked populations Evaluation of camera trap-based abundance estimators for unmarked populations
Estimates of species abundance are critical to understand population processes and to assess and select management actions. However, capturing and marking individuals for abundance estimation, while providing robust information, can be economically and logistically prohibitive, particularly for species with cryptic behavior. Camera traps can be used to collect data at temporal and...
Authors
S M Amburgey, Amy A. Yackel Adams, B. Gardner, N.J. Hostetter, S.R. Siers, B.T. McClintock, Sarah J. Converse
Non-USGS Publications**
Graham, L., A.A. Yackel Adams, and E.A. Odell. 1999. Devaluation of non-experiments in the current ecological paradigm. Wildlife Society Bulletin. 26(4): 1002-1006.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 17
Filter Total Items: 45
Dataset from 2015-2016 thermal and behavior monitoring of Argentine giant tegus in Everglades, Florida Dataset from 2015-2016 thermal and behavior monitoring of Argentine giant tegus in Everglades, Florida
Thermal data collected from iButton temperature loggers implanted into research animals (Argentine giant tegus) and in their surrounding environment. Tegus undergo winter dormancy (hibernation) to cope with colder temperatures, and we studied the thermal habits of wild tegus within their invaded range in southern Florida, USA. We used radiotelemetry and trail cameras to verify dates of...
Visual Surveys Rapid Response Saipan 2016 Visual Surveys Rapid Response Saipan 2016
Nocturnal visual encounter survey data conducted by 29 searchers over 17 transects obtained during a Brown Treesnake rapid response deployment to island of Saipan in 2016. Surveys took place in the vicinity of the Saipan airport and Dandan village (ca. 15.127°N, 145.735°E) from 06 January to 13 March 2016, 6-7 nights/week but with a break in surveying from 26 January through 21 February...
Airsoft electric gun evaluation on Brown Treesnakes, Guam, 2016 Airsoft electric gun evaluation on Brown Treesnakes, Guam, 2016
The data set consists of 2 spreadsheets from Airsoft Electric Gun (AEG) trials on brown treesnakes. AEG snake wound data contains AEG results from guns equipped with 0.39 gram ammunition (plastic pellets ) that were fired at dead and live snakes from distances of 4, 8, and 12 m to measure tissue-penetration depth, and noted if (a) the pellet was lodged inside the peritoneal cavity, (b)...
Failed Brown Treesnake bait cartridges from an aerially application in Guam, 2018 Failed Brown Treesnake bait cartridges from an aerially application in Guam, 2018
The dataset contains 6 columns of data collected during line transect surveys (Line) that evaluated bait cartridge efficacy for Brown Treesnake control on Guam. Two-person teams recorded all bait cartridges observed while walking the center line of transects in the Habitat Management Unit (HMU). Perpendicular distance (DIST (m)) to cartridges from center line was measured to the nearest...
Brown Treesnake counts during visual encounter surveys at three walking paces, Guam 2016 Brown Treesnake counts during visual encounter surveys at three walking paces, Guam 2016
We evaluated three walking paces to estimate (1) how snake detection rate per unit distance changes with increasing pace, and (2) how total number of snakes found by the end of a night of surveying varies with pace when the amount of surveying time per night is held constant. For a ?fast? pace we searched the 220 meter-long transect in 10 minutes, corresponding to a walking pace of 1.32...
Brown Treesnake visual survey and radiotelemetry data, Guam 2015 Brown Treesnake visual survey and radiotelemetry data, Guam 2015
The dataset consists of two spreadsheets that contain brown treesnake data (location, perch taxa, perch height, time of detection, whether visible or not, and size of snake) collected during both visual surveys and radio telemetry within a 55-ha enclosure on Guam.
Removal count data of Veiled Chameleons on Maui, 2002-2012 Removal count data of Veiled Chameleons on Maui, 2002-2012
The data set consists of 3 spreadsheets: counts, efforts, and location that detail the 10-year removal effort of invasive Veiled Chameleons (Chamaeleo calyptratus) on the island of Maui. Recorded are the number of lizards removed from each site, the level of search effort at each site, and the centroid location of each sampled site.
Habitat characterization around standard brown treesnake traps on Guam, 2004 - 2017 Habitat characterization around standard brown treesnake traps on Guam, 2004 - 2017
Data were collected in association with locations of standard brown treesnake traps on Guam at location prior to suppression or control efforts and after control had occurred. In all cases study sites were closed or semi-closed populations of brown treesnakes. Habitat data focused on type and structure of the habitat within 10-m of the trap.
Dataset: Passive restoration following ungulate removal in a highly disturbed tropical wet forest devoid of native seed dispersers Dataset: Passive restoration following ungulate removal in a highly disturbed tropical wet forest devoid of native seed dispersers
On an island largely devoid of native vertebrate seed dispersers, we monitored forest succession for seven years following ungulate exclusion from a 5-hectare area and adjacent plots with ungulates still present. The study site was in northern Guam on Andersen Air Force Base (1337N, 14451E) and situated on a coralline limestone plateau. We established 22 plots and six 0.25-m2 subplots to...
Filter Total Items: 101
Face-off: Novel depredation and nest defense behaviors between an invasive and a native predator in the Greater Everglades Ecosystem, Florida, USA Face-off: Novel depredation and nest defense behaviors between an invasive and a native predator in the Greater Everglades Ecosystem, Florida, USA
We describe several photo-documented novel interactions between intraguild predators in southern Florida—the native bobcat (Lynx rufus) and the invasive Burmese python (Python bivittatus). Over several days we documented a bobcat's depredation of an unguarded python nest and subsequent python nest defense behavior following the return of both animals to the nest. This is the first...
Authors
Andrea Faye Currylow, Matthew F. McCollister, Gretchen Erika Anderson, Jillian Maureen Josimovich, Austin Lee Fitzgerald, Christina M. Romagosa, Amy A. Yackel Adams
Individual heterogeneity influences the effects of translocation on urban dispersal of an invasive reptile Individual heterogeneity influences the effects of translocation on urban dispersal of an invasive reptile
Background Invasive reptiles pose a serious threat to global biodiversity, but early detection of individuals in an incipient population is often hindered by their cryptic nature, sporadic movements, and variation among individuals. Little is known about the mechanisms that affect the movement of these species, which limits our understanding of their dispersal. Our aim was to determine...
Authors
Abigail B. Fueka, Melia G. Nafus, Amy A. Yackel Adams, Larissa L. Bailey, Mevin B. Hooten
Can we prove that an undetected species is absent? Evaluating whether brown treesnakes are established on the island of Saipan using surveillance and expert opinion Can we prove that an undetected species is absent? Evaluating whether brown treesnakes are established on the island of Saipan using surveillance and expert opinion
Detection of invasive species and decisions centered around early detection and rapid response (EDRR) are notorious challenges for decision makers. Detection probability is low for cryptic species, resources are limited, and ecological harm (especially for island ecosystems) can result from failure to remove invasive species due to inadequate or delayed surveillance efforts. Due to the...
Authors
Amy A. Yackel Adams, Patrick D Barnhart, Gordon H. Rodda, Eric T. Hileman, Melia Gail Nafus, Robert Reed
Agkistrodon conanti (Florida Cottonmouth) and Python bivittatus (Burmese Python). Diet and Predation Agkistrodon conanti (Florida Cottonmouth) and Python bivittatus (Burmese Python). Diet and Predation
Python bivittatus is established in the Greater Everglades Ecosystem in southern Florida, USA. Documented predators on pythons in Florida include Alligator mississippiensis (American Alligator; Snow et al. 2006. Herpetol. Rev. 37:81–81), Drymarchon couperi (Gulf Coast Indigo Snake; Andreadis et al. 2018. Herpetol. Rev. 49:341–342), Lynx rufus (Bobcat; McCollister et al. 2021. Southeast...
Authors
Ian A. Bartoszek, Gretchen Erika Anderson, Ian Easterling, Jillian Maureen Josimovich, Alex Furst, Frank N. Ridgley, Austin Lee Fitzgerald, Amy A. Yackel Adams, Andrea Faye Currylow
Demographic response of brown treesnakes to extended population suppression Demographic response of brown treesnakes to extended population suppression
From a management perspective, reptiles are relatively novel invasive taxa. Few methods for reptile control have been developed and very little is known about their effectiveness for reducing reptile populations, particularly when the goal is eradication. Many reptiles, and especially snakes, are cryptic, secretive, and undergo extended periods of inactivity, traits that decrease...
Authors
Melia G. Nafus, Shane R. Siers, Brenna A. Levine, Zachary C. Quiogue, Amy A. Yackel Adams
Tools for increasing visual encounter probabilities for invasive species removal: A case study of brown treesnakes Tools for increasing visual encounter probabilities for invasive species removal: A case study of brown treesnakes
Early detection and rapid response (EDRR) are essential to identifying and decisively responding to the introduction or spread of an invasive species, thus avoiding population establishment and improving the probability of achieving eradication. However, detection can be challenging at the onset of a species invasion as low population densities can reduce detection probability and...
Authors
Staci M. Amburgey, Amy A. Yackel Adams, Beth Gardner, Bjorn Lardner, Sarah J. Converse
Olfactory lures in predator control do not increase predation risk to birds in areas of conservation concern Olfactory lures in predator control do not increase predation risk to birds in areas of conservation concern
Context: Lethal control of predators is often undertaken to protect species of conservation concern. Traps are frequently baited to increase capture efficacy, but baited traps can potentially increase predation risk by attracting predators to protected areas. This is especially important if targeted predators can escape capture due to low trap success. Snake traps using live mouse lures...
Authors
Page E. Klug, Amy A. Yackel Adams, Robert Reed
Female persistence during toxicant treatment predicts survival probability of offspring in invasive brown treesnakes (Boiga irregularis) Female persistence during toxicant treatment predicts survival probability of offspring in invasive brown treesnakes (Boiga irregularis)
Assessing the long-term efficacy of control methods is a critical component of invasive species management. For example, if traits related to control have significant heritability or are influenced by maternal effects, control methods may lose efficacy over time. The potential for these effects can be evaluated via parent/offspring survival analysis, which concomitantly recasts adaptive...
Authors
Brenna A Levine, Amy A. Yackel Adams, Marlis Douglas, Michael Douglas, Melia Gail Nafus
Foraging behavior in a generalist snake (brown treesnake, Boiga irregularis) with implications for avian reintroduction and recovery Foraging behavior in a generalist snake (brown treesnake, Boiga irregularis) with implications for avian reintroduction and recovery
Broad foraging classifications, such as generalist or specialist forager, are generally beneficial for population management in defining expectations of typical behavior. However, better understanding as to how individual variance in behavior interfaces with management actions, such as control of an invasive predator (such as brown treesnakes; Boiga irregularis) responsible for...
Authors
Melia G. Nafus, Peter X. Xiong, Eben H. Paxton, Amy A. Yackel Adams, Scott Michael Goetz
Thermal stability of an adaptable, invasive ectotherm: Argentine giant tegus in the Greater Everglades ecosystem, USA Thermal stability of an adaptable, invasive ectotherm: Argentine giant tegus in the Greater Everglades ecosystem, USA
Invasive species globally threaten biodiversity and economies, but the ecophysiological mechanisms underlying their success are often understudied. For those alien species that also exhibit high phenotypic plasticity, such as habitat generalists, adaptations in response to environmental pressures can take place relatively quickly. The Argentine giant tegu (Salvator merianae; tegu) is a...
Authors
Andrea Faye Currylow, Michelle Collier, Emma B. Hanslowe, Bryan G. Falk, Brian S. Cade, Sarah E. Moy, Alejandro Grajal-Puche, Frank N. Ridgley, Robert Reed, Amy A. Yackel Adams
Brown treesnake mortality after aerial application of toxic baits Brown treesnake mortality after aerial application of toxic baits
Quantitative evaluation of control tools for managing invasive species is necessary to assess overall effectiveness and individual variation in treatment susceptibility. Invasive brown treesnakes (Boiga irregularis) on Guam have caused severe ecological and economic effects, pose a risk of accidental introduction to other islands, and are the greatest impediment to the reestablishment of
Authors
Scott Michael Goetz, Eric T. Hileman, Melia G. Nafus, Amy A. Yackel Adams, Amanda R Bryant, Robert Reed, Shane R. Siers
Evaluation of camera trap-based abundance estimators for unmarked populations Evaluation of camera trap-based abundance estimators for unmarked populations
Estimates of species abundance are critical to understand population processes and to assess and select management actions. However, capturing and marking individuals for abundance estimation, while providing robust information, can be economically and logistically prohibitive, particularly for species with cryptic behavior. Camera traps can be used to collect data at temporal and...
Authors
S M Amburgey, Amy A. Yackel Adams, B. Gardner, N.J. Hostetter, S.R. Siers, B.T. McClintock, Sarah J. Converse
Non-USGS Publications**
Graham, L., A.A. Yackel Adams, and E.A. Odell. 1999. Devaluation of non-experiments in the current ecological paradigm. Wildlife Society Bulletin. 26(4): 1002-1006.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.