Abstract:

A suite of body size metrics, number of shell scars, age class, and biomass for individual Littoraria irrorata periwinkles were determined from two replicate plots along a transect of five distance points from the marsh edge in five regions in southeastern Louisiana between the Atchafalaya and Mississippi rivers in June, August and September of 2016. Each row contains the data for an individual periwinkle.

Suggested Citation:

Roberts, Brian J.. 2018. Individual Littoraria irrorata body size metrics, shell scar, and age class data in southeastern Louisiana salt marshes, June-September 2016. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N779432B

Publications:

Rietl, A. J., Sorrentino, M. G., & Roberts, B. J. (2018). Spatial distribution and morphological responses to predation in the salt marsh periwinkle. Ecosphere, 9(6), e02316. doi:10.1002/ecs2.2316

Purpose:

This dataset was developed to understand the ecological distribution, body size metrics, allometry, and relationship to the dominant plant species (S. alterniflora) of the salt marsh periwinkle Littoraria irrorata.

Data Parameters and Units:

Year: Year of sampling Date: Date of sampling Region: Region of collection Region ID: CO = Cocodrie, EB = East Barataria, OB = Oyster Bayou, PF = Port Fourchon, TB = Terrebonne Bay Site: Site identifier Latitude (decimal degrees) Longitude (decimal degrees) Distance from marsh edge (m): Location of sampling plots in the marsh Plot: plot sampled (a and b, replicate plots) Number of Littoraria irrorata shell scars: Number of shell scars on each individual Littoraria irrorata for each plot (a and b) at each distance point from the marsh edge Littoraria irrorata shell length (mm): Shell length in millimeters of Littoraria irrorata from each plot (a and b) at each distance point from the marsh edge Littoraria irrorata shell width (mm): Shell width in millimeters of Littoraria irrorata from each plot (a and b) at each distance point from the marsh edge Littoraria irrorata aperture length (mm): Aperture opening length in millimeters of Littoraria irrorata from each plot (a and b) at each distance point from the marsh edge Littoraria irrorata aperture width (mm): Aperture opening width in millimeters of Littoraria irrorata from each plot (a and b) at each distance point from the marsh edge Littoraria irrorata posterior ridge thickness (mm): Posterior ridge thickness of the aperture opening in millimeters of Littoraria irrorata from each plot (a and b) at each distance point from the marsh edge Littoraria irrorata central ridge thickness (mm): Central ridge thickness of the aperture opening in millimeters of Littoraria irrorata from each plot (a and b) at each distance point from the marsh edge Littoraria irrorata anterior ridge thickness (mm): Anterior ridge thickness of the aperture opening in millimeters of Littoraria irrorata from each plot (a and b) at each distance point from the marsh edge Littoraria irrorata mean ridge thickness (mm): Mean of posterior, central, and anterior ridge thickness measurements of Littoraria irrorata from each plot (a and b) at each distance point from the marsh edge Littoraria irrorata age class: Age class of Littoraria irrorata, defined as either Juvenile, Sub-Adult, or Adult Littoraria irrorata biomass (g): Biomass in grams of ash free dry mass (AFDM) for individual Littoraria irrorata “-“ indicates no measurement of individual biomass was made for that individual NA = not applicable

Individual Files: