Dataset: Brown_et_al_2016 QuadratSurvey

Name: Mass mortality of the vermetid gastropod Ceraesignum maximum
Published: 2017-10-05
Keywords: oceans

Cite This Dataset

Spatial Extent: N:-17.47279 E:-149.78277 S:-17.48365 W:-149.84698

Temporal Extent: 2015-06-05 - 2015-08-27

Project:

Spatial patterns of coral-vermetid interactions: short-term effects and long-term consequences (Vermetids_Corals)

Principal Investigator:

Anya L. Brown (University of Georgia, UGA)

Co-Principal Investigator:

Thomas Frazer (University of Florida, UF)

Craig Osenberg (University of Georgia, UGA)

Jeffrey Shima (Victoria University of Wellington)

Contact:

Anya L. Brown (University of Georgia, UGA)

BCO-DMO Data Manager:

Mathew Biddle (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

2017-10-05

Version Date:

2017-10-05

Restricted:

Current State:

Preliminary and in progress

Mass mortality of the vermetid gastropod Ceraesignum maximum

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Description

Vermetid counts and their status on reefs around French Polynesia.

Related Datasets:

Brown_et_al_2016_SimpleCounts: https://www.bco-dmo.org/dataset/721511
Brown_et_al_2016_SizeComparison: https://www.bco-dmo.org/dataset/721581
Brown_et_al_2016_QuadratSurvey: https://www.bco-dmo.org/dataset/721232 (The current page.)

Methods & Sampling

In Tahiti and Moorea, Anya, Amy and Morgan visited different sites around the island and counted the vermetids, recorded the aperature size (length of the shell opening) as well as their statuses. Statuses were determined by Alive Net (AN), if snails were alive and making a net, Alive (A), if snails were alive and are not retracted but are not making a net, Alive Retracted (AR), if snails are alive, but they are retracted at least 5mm into the shell, or Recently Dead (RD) if snails had recently died and have either a bright white shell or a shell with a light layer of turf growing.

Hal Lecinsky and Nicole Boriski and Leslie Bissey (from the Paul Gaughin) took photographs of vermetids and sent them to Anya, and she determined the status of the snails (AN, A, AR, RD). For these data, aperature size could not be determined.

For the Hilton site, we used the reefs where we had counted vermetids and also assessed vermetid status.

Data Processing Description

BCO-DMO Processing:

added conventional header with dataset name, PI name, version date
modified parameter names to conform with BCO-DMO naming conventions
converted date from mm-dd-yy to yyyymmdd.
replaced spaces with underscores.
blank values replaced with no data value 'nd'.

Data Files

File
Brown_2016_Quadrat_Survey.csv (Comma Separated Values (.csv), 137.37 KB) MD5:bf0495acfae457c80262cfe8ad0ec9a3 Primary data file for dataset ID 721232

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1130359

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
Osenberg_et_al_Moorea		2003-05-19	Osenberg et al Moorea	Craig Osenberg (Principal Investigator)	data info

Instruments

Diving Mask and Snorkel

Supplied Name: snorkel

Supplied Description:

Researchers snorkeled to the reef crest.

Instrument Type

Generic Name: Diving Mask and Snorkel

Generic Description:

A diving mask (also half mask, dive mask or scuba mask) is an item of diving equipment that allows underwater divers, including, scuba divers, free-divers, and snorkelers to see clearly underwater.

Snorkel: A breathing apparatus for swimmers and surface divers that allows swimming or continuous use of a face mask without lifting the head to breathe, consisting of a tube that curves out of the mouth and extends above the surface of the water.

Parameters

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
Aperature_size	length of aperature	milimeters (mm)	length
Amount_retracted	length retracted into shell	milimeters (mm)	length
quad_num	photo number (for Hal; Nicol and Leslie data); reef number (Hilton site) or quadrate number from which data were collected. (the rest)	unitless	sta_id
Verm_status	status of vermetids (Alive; Alive with a net; Alive and retracted; Recently Dead)	unitless	sample_descrip
Net_presence	Presence or absence of a net	unitless	sample_descrip
Loc_num	numerical representation of different sites	unitless	site
Notes	Additional comments.	unitless	comment
Date	date of sampling in yyyymmdd format	unitless	date
Observer	Initials of the observer (Anya L Brown; Morgan V Farrell; Amy A Briggs; Hal Lescinsky; Leslie Bissey and Nicole Boriski)	unitless	person
Site	Name of site	unitless	site
Location_name	Island name and number that corresponds to a unique site	unitless	site_descrip
Island	Island where counts were made	unitless	region

Status message

Database

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Dataset: Brown_et_al_2016 QuadratSurvey