Project name: Aratus behavioral responses to vegetation structure at range edge 		
Publication Citation: C. A. Johnston & R. S. Smith. Vegetation structure mediates a shift in predator avoidance behavior in a range-edge population. Behavioral Ecology. 2018.		
"Author contact information: Dr. Cora Johnston, coraann.johnston@gmail.com, 757-710-2795, University of Virginia Anheuser-Busch Coastal Research Center, Oyster,VA; Rachel S. Smith, Rssmith218@gmail.com, 804-310-2474, University of Georgia, Odum School of Ecology, 140 E. Green Street, Athens, GA"		
Data processing and analyses: All data processing and analyses were performed in the statistical program R and are described in the manuscript text. Columns that contain emergent data (such as ratios) and have been defined with reference to the component columns.		
De-identification procedures: N/A		
Data analysis operating system: R version 3.3.2; https://www.r-project.org/		
Associated dataset: Figure 1 was produced using USGS data on mangrove distribution presented in Osland et al 2013. The shapefile of mangrove cover is available at https://www.sciencebase.gov/catalog/item/523b572ae4b08cabd166d1a2.		
		
DataSet	ColumnName	Definition
All sets	Date	The date (month/day/year) on which data was collected.
	Site	The geographic location at which data was collected. See the manuscript for details about the four study sites.
	Habitat	"Studies were conducted in either saltmarsh (SM) or mangrove (MAN) dominated wetlands. The same characterization is provided in the ""SiteType"" column in some data sets."
	Rep	Replicate ID; unique within each data set.
		
AratusEdge_CrabandHabitatSurvey_JohnstonSmith.csv	Jump	Evasive behavior displayed by each crab: no evasion (N) or downward evasion by jumping (J) or dropping in increments along the vegetation (d) or upward fleeing (R) or rarely falling (F).
Description: Vegetation substrate and crab population field surveys in mangrove and saltmarsh habitats. 	Substrate Type	A description of the immediate substrate on which each crab was found.
"Associated Figures: Figure 2, Supplementary Figure 1"	Substrate Diameter	The diameter in mm of the immediate substrate on which each crab was found.
	CW	The diameter in mm of the carapace between the widest points behind the eyestalks.
	Legs missing	Number of legs that a crab was missing.
	LegMissingYN	Binomial characterization of whether a crab was missing at least one leg (1) or not (0).
	Sex	Male (M) or female (F) or gravid female (GF) or juvenile (J) as determined from morphology.
	Sex1	"The data from column ""Sex"" simplified to male (M) or (F); only adult crabs are included."
	CW Greater than Sub	Indicates whether a crab is larger than its substrate; marked 1 if the value in CWtoSubstrateRatio column is greater than 1.
	CW Less than Sub	Indicates whether a crab is smaller than its substrate; marked 1 if the value in CWtoSubstrateRatio column is 1.
	CW Equal to Sub	Indicates whether a crab matches its substrate width; marked 1 if the value in CWtoSubstrateRatio column is less than 1.
	CW to Substrate Ratio	The ratio of the CW column and Substrate diameter column.
		
		
AratusEdge_FieldAssayofEvasionBehavior_JohnstonSmith.csv	SiteType	"Studies were conducted in either (salt)marsh- or mangrove-dominated wetlands; corresponds to ""Habitat"" column in other data sets."
Description: Field assays of crab behavior relative to vegetation substrate size in mangrove and saltmarsh habitats	Adult	Binomial statement characterizing each crab as either adult or juvenile. 
Associated Figures: Figure 3	Jump	Evasive behavior displayed by each crab: no evasion (N) or downward evasion by jumping (J) or dropping in increments along the vegetation (d) or upward fleeing (R) or rarely falling (F).
	RouteEvasion	Upward or downward or none (no response) characterize the direction of crab evasive movement relative to its starting point.
	Evasive	Binomial characterization of whether a crab evaded: yes (1) or no (0).
	Substrate	A description of the immediate substrate on which each crab was found.
	SizeRelSubstrate	Categorization of crab size ratio (a measure of perceived safety) based on the following three size ratio columns.
	CW Greater than Sub	Indicates whether a crab is larger than its substrate; marked 1 if the value in CWtoSubstrateRatio column is greater than 1.
	CW Less than Sub	Indicates whether a crab is smaller than its substrate; marked 1 if the value in CWtoSubstrateRatio column is 1.
	CW Equal to Sub	Indicates whether a crab matches its substrate width; marked 1 if the value in CWtoSubstrateRatio column is less than 1.
		
AratusEdge_TetheredSurvivalExperimentOutcomes_JohnstonSmith.csv	Set out Time	Time of tethered crab deployment.
Description: Crab tethering field experiment in mangrove and saltmarsh habitats	Take down Time	Time of tethered crab retrieval.
Associated Figures: Figure 4	Habitat	Studies were conducted in either saltmarsh (SM) or mangrove (MAN) dominated wetlands.
	Tide	Tide stage during tethered period (see manuscript for inference).
	Rep	Replicate ID; unique within each data set.
	Alive	Binomial response indicating whether a crab was alive (1) or dead (0) upon tether retrieval.
	Present	Binomial response indicating whether a crab (body) was present (1) or absent (0) from the tether retrieval. Absence indicates predation.
	Location	Description of the crab's position upon tether retrieval.
	Detail	Additional observations about the state of the tether or tethered crab.
		
AratusEdge_SizeofTetheredCrabsbyGroup_JohnstonSmith.csv	Set out Time	"Time of tethered crab deployment, which is included here to identify tethering sessions."
Description: Sizes of crabs used in tethering field experiment in mangrove and saltmarsh habitats	Take down Time	"Time of tethered crab retrieval, which is included here to identify tethering sessions."
Associated Figures: none.	Habitat	Studies were conducted in either saltmarsh (SM) or mangrove (MAN) dominated wetlands.
	Tide	Tide stage during tethered period (see manuscript for inference).
	CW	The diameter in mm of the carapace between the widest points behind the eyestalks.