|Grosholz, Edwin||University of California-Davis (UC Davis)||Principal Investigator|
|de Rivera, Catherine||Portland State University (PSU)||Co-Principal Investigator|
|Ruiz, Gregory||Portland State University (PSU)||Co-Principal Investigator|
|Rauch, Shannon||Woods Hole Oceanographic Institution (WHOI BCO-DMO)||BCO-DMO Data Manager|
Green crab size based predation trials conducted in laboratory mesocosms at Romberg Tiburon Center, Tiburon, CA in 2015.
We conducted short-term size-based predation (=cannibalism) experiments in which five smaller green crabs were placed in a laboratory mesocosm with a large adult green crab. Size ratios of large to small crabs were experimentally varied using adult crabs of three size classes and juvenile crabs as small as were available representing recent recruits. Adult crabs were starved for 48 hours prior to the trial. Alternate prey in the form of small clams were also available in the mesocosms. Experiments were run for 24 hours after which are remaining crabs were retrieved and remeasured. All crabs were collected from Seadrift Lagoon, CA.
See Turner et al. (2016) Biological Invasions 18: 533-548 for additional methodological details:
Turner, B.C., de Rivera, C.E., Grosholz, E.D., & Ruiz, G.M. 2016. Assessing population increase as a possible outcome to management of invasive species. Biological Invasions, 18(2), pp 533–548. doi:10.1007/s10530-015-1026-9
Data were entered and checked in MS Excel spreadsheets. Statistical analyses were run with either (R Development Core Team) or SAS (Statistical Analysis Systems).
- re-formatted date to yyyy-mm-dd;
- re-formatted time to HHMM;
- modified parameter names to conform with BCO-DMO naming conventions (changed to lowercase from mixed case; replaced spaces with underscores);
- replaced commas with semi-colons.
|trial_number||Trial number (2-10)||unitless|
|time_point||Observation points 1-3||unitless|
|date||Calendar date (yyyy-mm-dd)||unitless|
|tank_number||Number identifying the tank. There was one tank for each set of one predator and five prey crabs, with three tanks in each of three larger tubs||unitless|
|tub_number||Number identifying the tub. There were three tubs each containing three tanks.||unitless|
|predator_size||Carapace width of single large crab in millimeters||millimeters (mm)|
|origin||Collection location of crabs||unitless|
|time||Time of observation for 'time point' in Pacific time (HHMM)||unitless|
|prey_found||Number of prey crabs recorded at time point (NA at time zero because crabs were added then)||unitless|
|prey_size_1||Carapace width of prey crab #1||millimeters (mm)|
|prey_size_2||Carapace width of prey crab #2||millimeters (mm)|
|prey_size_3||Carapace width of prey crab #3||millimeters (mm)|
|prey_size_4||Carapace width of prey crab #4||millimeters (mm)|
|prey_size_5||Carapace width of prey crab #5||millimeters (mm)|
|notes||Additional comments about crabs||unitless|
This document is created by info v 4.1f 5 Oct 2018 from the content of the BCO-DMO metadata database. 2020-02-17 17:14:38