Unit Leader, Research Ecologist
Email:
sconverse@usgs.gov
Office Phone:
206-221-5791
Fax:
206-616-9012
ORCID:
0000-0002-3719-5441
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(Abstract from Wiley Online Library): Individual variation in life-history traits can have important implications for the ability of populations to respond to environmental variability and change. In migratory animals, flexibility in the timing of life-history events, such as juvenile emigration from natal areas, can influence the effects of population density and environmental conditions on habitat use and population dynamics. We evaluated the functional relationships between population density and environmental covariates and the abundance of juveniles expressing different life-history pathways in a migratory fish, Chinook salmon (Oncorhynchus tshawytscha), in the Wenatchee River basin in Washington State, USA....
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Nocturnal visual encounter surveys for Brown Treesnakes were collected and summarized into 4 plain text files (csv format): CapturesLure, SurveysLure, CapturesScent, and SurveysScent. Capture files contain unique Passive Integrated Transponder (PIT) tag identification and measurements of snakes with dates and locations of capture. Survey files contain the dates of transect sampling and treatment application for each transect (Transect ID). Each project used a different type of attractant, either a live-mouse lures in snake traps or liquid fish fertilizer scented spray. Surveys were conducted in a 5-ha geographically closed population on Guam. Teams of two observers conducted night-time surveys from February 1 to...
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Herbicide treatments were applied to Zerene silverspot (Speyeria = Argynnis zerene zerene) post-diapause larvae and early blue violets (Viola adunca), the larval host plant of the Zerene silverspot butterfly, in two greenhouse experiments in 2018-2019. Treatments included distilled water for untreated (U), Agri-Dex (A), Nu Film IR (N), clopyralid (C), clopyralid with Agri-Dex (CA), clopyralid with Nu Film IR (CN), fluazifop-p-butyl (F), fluazifop-p-butyl with Agri-Dex (FA), and fluazifop-p-butyl with Nu Film IR (FN). Zerene silverspot responses measured in the 2018 experiment included larval and pupal survival, sex ratio, larval and pupal development time, pupal and adult mass, adult morphology, female fecundity,...
Categories: Data;
Tags: Butterfly conservation,
Clopyralid,
Ecology,
Fluazifop-p-butyl,
Habitat restoration, All tags...
Herbicides,
Speyeria = Argynnis,
USGS Science Data Catalog (SDC),
Washington,
Wildlife Biology, Fewer tags
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Manually photo-processed remote camera trap data of Brown Treesnakes on Guam at snake traps with live mouse lures. Records of snakes entering the field of view (FOV) and exiting the FOV by day, time, and trap location. Photos were further processed to retain only detections of snakes up to 1.83 meters from the camera, i.e., only records of snakes that were on or in front of the mouse-lure trap are retained in the data file.
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Data fall into three types: 1) individual snake scanning data (PIT tag ID, time stamp, and device) downloaded from readers, 2) individual trait data (sex, size, etc) of tested brown treesnakes, and 3) detailed transcripts of videos of behavioral trial data as snakes interacted with the readers. All data were collected in an experimental arena in Dededo, Guam in August 2021.
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