Dataset: Geange_and_Stier_2010 Charismatic Microfauna Functional Response

Name: Attack rates and handling time of prey based on prey density at Moorea, French Polynesia on May 2008 (CDD_in_Reef_Fish project)
Published: 2017-10-05
Keywords: oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.726813.1

Spatial Extent: N:-17.5 E:-149.8333333 S:-17.5 W:-149.8333333

Temporal Extent: 2008-05-08

Project:

Cryptic density dependence: the effects of spatial, ontogenetic, and individual variation in reef fish (CDD_in_Reef_Fish)

Principal Investigator:

Shane Geange (Victoria University of Wellington)

Co-Principal Investigator:

Jeffrey Shima (Victoria University of Wellington)

Adrian Stier (University of California-Santa Barbara, UCSB)

Contact:

Shane Geange (Department of Conservation - Wellington, New Zealand)

BCO-DMO Data Manager:

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

Version:

Version Date:

2017-10-05

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Attack rates and handling time of prey based on prey density at Moorea, French Polynesia on May 2008 (CDD_in_Reef_Fish project)

Abstract:

This dataset is part of a manipulative experiment to investigate how nudibranchs and sea hares alter cyanobaterica production through a trophic cascade. This research was conducted in 2008 at the Gump Biological Research Station, Moorea, French Polynesia.

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Archival Copy

Version Date	Archive	Persistent Identifier (PID)	Date PID Issued
2017-10-05	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.726813.1	2021-06-29

Description

This dataset is part of a manipulative experiment to investigate how nudibranchs and sea hares alter cyanobaterica production through a trophic cascade. This particular dataset looks into attack rates and handling time of prey based on prey density. This research was conducted in 2008 at the Gump Biological Research Station, Moorea, French Polynesia. For additional data, please see files listed in Related Datasets.

Related Dataset

Geange_and_Stier_2010 Charismatic Microfauna Functional Response: https://www.bco-dmo.org/dataset/726813 (current page)
Geange_and_Stier_2010 Charismatic Microfauna Sea Hare Size: https://www.bco-dmo.org/dataset/726832
Geange_and_Stier_2010 Charismatic Microfauna Trophic Cascade: https://www.bco-dmo.org/dataset/726851

Methods & Sampling

All experiments were conducted in plastic containers (190 mm x 190 mm x 90 mm; W x L x H). To allow the exchange of fresh seawater, approx. 80% of the surface area of the lids, and two opposing sides of containers were cut away and covered with 0.5 mm mesh screening. Containers were placed within large (2,670 l) outdoor flow-through seawater tanks (10 containers per tank). In each experiment, sea hares (Stylocheilus striatus), nudibranchs (Gymnodoris ceylonica), and cyanobacteria (Lyngbya spp.) were collected from the field. Prior to experiments, nudibranchs were starved for 3 days, and cyanobacteria were rinsed with filtered seawater, which removed associated flora or fauna.

Nine density treatments (1, 2, 3, 4, 5, 6, 7, 8 or 9 sea hares: mean length 20.0 mm ± 3.8 SD) were randomly assigned to 18 containers (n = 2 per treatment), each containing one adult nudibranch (mean length 36.2 mm ± 5.6 SD). The number of sea hares eaten was recorded after 1 day (24 h).

Data Processing Description

Although this dataset does not contain any processed/analyzed data, this data was used to calculate both attack rates and handling time as follows. Attack rates and handling time were estimated using a Holling Type II functional response. Because prey organisms were not replaced as they were consumed, attack rate and handling time were estimated using Roger’s ‘random predator equation.’

BCO-DMO Processing:

added conventional header with dataset name, PI name, version date
modified parameter names to conform with BCO-DMO naming conventions
date converted from dd-Mon-yy (eg, 8-May-08) to yyyymmdd (eg. 20080508)

Data Files

File
GeangeandStier_2010_Charismaticmicrofauna_FunctionalResponse.csv (Comma Separated Values (.csv), 603 bytes) MD5:4699db9f15ae148a5123e4affe4e3af5 Primary data file for dataset ID 726813

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-0242312

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

None available yet

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
Date	Date of Experiment (yyyymmdd)	unitless	date
OBS	Name of observers (SWG (Shane Geange) ACS (Adrian Stier)	unitless	person
rep	Experimental run (1 or 2)	unitless	exp_id
bin	Unique container ID	unitless	sample
initial_num	Initial number of sea hares at the start of the experiment in each container	unitless	count
number_eaten	Number of sea hares eaten during the experiment	unitless	count
Notes	Additional notes	unitless	no_bcodmo_term

Status message

Database

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Dataset: Geange_and_Stier_2010 Charismatic Microfauna Functional Response