Work Description

��Date: 11 May, 2021 Dataset Title: Neotropical snake photographs Dataset Creators: University of Michigan, Division of Herpetology, Alison R. Davis Rabosky, Joanna Larson, Talia Y. Moore, John Davis Curlis Dataset Contact: Alison R. Davis Rabosky (ardr@umich.edu) Funding: David and Lucille Packard Foundation Key Points: This dataset includes dorsal and ventral photographs of Neotropical snakes collected in the Peruvian Amazon. Research Overview: These data were collected to survey and examine the diversity in color pattern evolution in Neotropical snakes. Methodology: All animal-related procedures have been approved by the University of Michigan Institutional Animal Care and Use Committee (Protocols #PRO00006234 and #PRO00008306) and the Peruvian government SERFOR (Servicio Nacional Forestal y de Fauna Silvestre; permit numbers: 029-2016-SERFOR-DGGSPFFS, 405-2016-SERFOR-DGGSPFFS, 116-2017-SERFOR-DGGSPFFS). We collected data during five field expeditions in the Amazonian lowlands of Peru from March 2016 to December 2018, at Villa Carmen, Los Amigos, Madre Selva, and Santa Cruz Biological Stations (Fig. 1B). We captured snakes either in funnel traps or opportunistically during transects, then transported the snakes in fabric bags secured within 20 L lidded buckets back to the station. During capture and handling, all trained personnel were equipped with snake hooks, tongs, venom defender gloves (1-2-1 Products Ltd., Alfreton, UK), and knee-high rubber boots to avoid envenomation. We either vouchered snakes into the University of Michigan Museum of Zoology (UMMZ) or the Museo de Historia Natural in Lima, Peru (MUSM). All vouchered snakes were also weighed for body mass, measured for snout vent length (SVL) and tail length, and sexed where possible. Field numbers and museum accession numbers (when available) for each individual are reported. Instrument and/or Software specifications: -All specimens were photographed using a modified (mirror-removed) Nikon D7200 camera body with a Jenoptik 60mm macro lens attached. -The camera was set to a shutter speed of 1/5 s, an F-stop of 20, and an ISO of 200. The camera was mounted on a tripod, angled straight downward above the specimen, and positioned at a height that varied with specimen size. -Rather than using the camera s built in flash, each specimen was illuminated from multiple angles using fluorescent and UV light bulbs. -The background of each specimen was a blue PVC mat (Elviros), which was unlikely to reflect wavelengths that overlap with those of the specimen. -Importantly, each image was framed such that it contained not only the specimen, but also a color standards card (X-rite Colorchecker Passport Pro) and a circular UV standard (40% Spectralon Diffuse Reflectance Standard) that functioned as both a color-calibration tool and an object of known diameter for size calibration. Files contained here: 253 files -Set1: This folder contains 151 photographs in .jpg format and one Set1.csv file with specimen information for each photograph. -Set2: This folder contains 50 photographs in .jpg format and one Set2.csv file with specimen information for each photograph. In the .csv files, the columns contain the following data for each photo: Photo File provides the file name institution provides the museum collection associated with the specimen and reg_number the museum accession number where available ID provides the field identification number for the individual specimen View indicates either d for dorsal or v for ventral Family provides the taxonomic family as of the date of this document Genus provides the taxonomic genus as of the date of this document Species provides the taxonomic genus as of the date of this document Country indicates the location where the specimen was captured and photographed Related publication(s): in progress Use and Access: To Cite Data: University of Michigan Division of Herpetology, Alison R. Davis Rabosky, Talia Y. Moore, John David Curlis (2021) Neotropical snake photographs [Data set] University of Michigan, Deep Blue