|Hixon, Mark||Oregon State University (OSU)||Lead Principal Investigator|
|Tuttle, Lillian J||Oregon State University (OSU)||Scientist|
|Rauch, Shannon||Woods Hole Oceanographic Institution (WHOI BCO-DMO)||BCO-DMO Data Manager|
An experiment was conducted on Bahamian reefs (at Eleuthera, Bahamas) in which red lionfish (Pterois volitans) densities were controlled on 8 paired reefs, one reef of the pair having low lionfish density artificially sustained and the other reef of the pair having high lionfish density artificially sustained. Censuses were taken of lionfish and gobies of the genus Elacatinus at each reef.
Before altering lionfish densities, baseline surveys were conducted in July 2012 in which investigators counted all gobies of the Elacatinus genus at each reef, along with their estimated total length and group size (number of individuals of the same species within 1 m). A month after establishing lionfish density treatments each reef was re-censused for all Elacatinus gobies. Of the 16 reefs, DP L02 and DP K02 were not re-censused because lionfish density treatments were never satisfactorily sustained. ND 07 and ND 06 were also not re-censused because they were used in a pilot study for which gobies were removed.
BCO-DMO Processing Notes:
- Added lat and lon for each site from the metadata provided.
- Added the species column containing species names, based on species code and the metadata provided.
- Modified parameter names to conform with BCO-DMO naming conventions.
- Replaced blanks with 'nd' to indicate 'no data'.
- 09-Jan-2018: removed embargo on dataset.
|site_id||Name of reef on which census was conducted.||text|
|lat||Latitude of the site.||decimal degrees|
|lon||Longitude of the site.||decimal degrees|
|initial_census_date||Date on which initial census was conducted.||mm/dd/YYYY|
|initial_lionfish_count||Number of naturally occurring lionfish found at each dive site on the date of the original census.||integer|
|date||Date on which census was conducted.||mm/dd/YYYY|
|month||2-digit month of year on which survey was conducted.||mm (01 to 12)|
|day||2-digit day of month on which survey was conducted.||dd (01 to 31)|
|year||4-digit year when survey was conducted.||YYYY|
|reef_quadrant||Area of the reef in which goby was counted: 1=top right quarter; 2=top left quarter; 3=bottom left quarter; 4=bottom right quarter.||integer|
|substrate||Type of coral, sponge, or other substrate on which goby was found.||text|
|species_group_size||Number of conspecifics found within 1 meter of each other.||integer|
|species_code||Code representing the cleaner (goby) species: ELAT = Elacatinus atronasus; ELEV = Elacatinus evelynae; ELGE = Elacatinus genie.||text|
|species||Name of species.||text|
|len_tot||Estimated total length of goby in centimeters. Total length is sometimes given as a range instead of a single number. This was done for larger groups of gobies for which it would be impractical to estimate the size of every individual. Assume that the frequency distribution (categorized into 0.5 cm size-bins) is normal, with the specified minimum and maximum total lengths for each group of gobies. (Originally named 'Estimated TL').||cm|
|Start Date|| |
|End Date|| |
Reefs were surveyed near the Cape Eleuthera Institute, Eleuthera Bahamas during the summer of 2012 as part of the project "Ecological Release and Resistance at Sea: Invasion of Atlantic Coral Reefs by Pacific Lionfish" and "Mechanisms and Consequences of Fish Biodiversity Loss on Atlantic Coral Reefs Caused by Invasive Pacific Lionfish" (NSF OCE-0851162 & OCE-1233027).
This document is created by info v 4.1f 5 Oct 2018 from the content of the BCO-DMO metadata database. 2020-02-18 01:10:12