|Hixon, Mark||Oregon State University (OSU)||Lead Principal Investigator|
|Ingeman, Kurt||Oregon State University (OSU)||Scientist|
|Rauch, Shannon||Woods Hole Oceanographic Institution (WHOI BCO-DMO)||BCO-DMO Data Manager|
Record of predators observed during reef surveys at Lee Stocking Island, Bahamas during July and August 2011. (Part of sub-project titled, "Lionfish effects on fairy basslet population dynamics".)
To quantify to what extent patterns in prey mortality have changed since the arrival of lionfish, the investigators replicated an in situ field manipulation of prey density that was originally conducted prior to the invasion using the same study sites. A controlled field experiment was conducted at two reefs near Lee Stocking Island, Bahamas, inhabited by 16 local populations of fairy basslet: eight with artificially enhanced recruitment versus eight with natural recruitment. Ledges were paired by habitat structure and one ledge from each pair was randomly assigned to receive artificially increased density of new basslet recruits, with the other in each pair left as a control.
Using the same methods as Webster (2003), the investigators artificially enhanced basslet recruitment by capturing new settlers (<2 cm total length) with dip nets and transferring them to new populations far from their natal reefs. Censuses commenced 24 hours after recruit manipulationsand continued weekly for two months. At the end of the eight week study period, the investigators calculated net per capita loss (the proportional change in abundance from the beginning to the end of the experiment) for each population.
BCO-DMO Processing Notes:
- Modified parameter names to conform with BCO-DMO naming conventions.
- Added lat and lon for each site from the metadata provided.
- Added species name, based on species code, from the species list.
- Replaced blanks with 'nd' in length and hunting columns.
- Replaced blanks with 'none' in species_code and species columns.
- Replaced 'N' and 'Y' with "No" and "Yes" in the hunting column.
- 28-Dec-2017: removed embargo from dataset.
|site||Name of the reef site.||text|
|lat_site||Latitude of the reef site.||decimal degrees|
|lon_site||Longitude of the reef site.||decimal degrees|
|location||One of two proximate study sites: Outer WH = Outer White Horse study site Innner WH = Inner White Horse study site||text|
|lat||Latitude of the specific reef location.||decimal degrees|
|lon||Longitude of the specific reef location.||decimal degrees|
|date||Date of the reef census in mm/dd/YYYY format.||unitless|
|survey||Weekly survey 1-10.||dimensionless|
|ledge_tag||Two-digit numeral corresponding to ear tag ledge marker.||dimensionless|
|species||Name of the species.||text|
|species_code||Four-letter species code.||code|
|length||Length (in centimeters).||cm|
|hunting||Indicates whether predator was actively hunting as indicated by typical hunting behavior.||Yes/No|
Tropical Marine Lab at Lee Stocking Island
|Start Date|| |
|End Date|| |
Locations of coral reef survey dives and sightings, or collections of the invasive red lionfish, Pterois volitans, near Lee Stocking Island, Bahamas for the projects "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). All dives were made from various small vessels (17' to 24' l.o.a., 40 to 275 HP outboard motors, 1 to 7 GRT). Vessel names include, Sampson, Orca, Potcake, Lusca, Lucaya, Zardoz, Parker, and Nuwanda.
This document is created by info v 4.1f 5 Oct 2018 from the content of the BCO-DMO metadata database. 2020-02-24 16:13:07