Part 1 of a 2 part manipulative experiment to investigate the existence of cooperative synergy in defensive behaviors of ‘guard’ crustaceans at Gump Research Station, Moorea, French Polynesia from July 2006 (CDD_in_Reef_Fish project)

Website: https://www.bco-dmo.org/dataset/727093
Data Type: experimental
Version: 1
Version Date: 2017-10-05

Project
» Cryptic density dependence: the effects of spatial, ontogenetic, and individual variation in reef fish (CDD_in_Reef_Fish)
ContributorsAffiliationRole
McKeon, C. S.Smithsonian Marine Station (SMS)Principal Investigator, Contact
Bolker, BenMcMaster UniversityCo-Principal Investigator
McIlroy, Shelby E.University of Hong KongCo-Principal Investigator
Stier, AdrianUniversity of Washington (UW)Co-Principal Investigator
Biddle, MathewWoods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager

Abstract
Part 1 of a 2 part manipulative experiment to investigate the existence of cooperative synergy in defensive behaviors of ‘guard’ crustaceans at Gump Research Station, Moorea, French Polynesia from July 2006 (CDD_in_Reef_Fish project).


Coverage

Spatial Extent: Lat:-17.5 Lon:-149.8333333
Temporal Extent: 2006-07-10 - 2006-07-28

Dataset Description

This dataset is part 1 of a 2 part manipulative experiment to investigate the existence of cooperative synergy in defensive behaviors of ‘guard’ crustaceans at Gump Research Station, Moorea, French Polynesia. Please reference the Related Datasets for additional datasets.

Related Datasets:


Acquisition Description

We used feeding trials to quantify the efficacy of defense for four exosymbiont treatment groups: Trapezia + Alpheus, Trapezia, Alpheus, and No Exosymbionts. Twenty replicates in total were conducted for each exosymbiont treatment in a temporally blocked design with two replicates in each of ten temporal blocks. Trials were conducted in a large octagonal flow-through seawater tank approximately 0.5 m deep and 2 m across. The tank was divided into eight equal sections using plastic screening. Each section was provisioned with a seastar refugium constructed from concrete blocks. We placed Pocillopora colonies into the tank from the field during mid- to late afternoon. To minimize variation driven by search time, a single Culcita was placed directly on top of the coral colony. The following morning, we measured the coral size (length, width, height) and the feeding scars left by the Culcita (length, width, depth). We calculated volume consumed as an ellipsoid (4= 3pabc , where a  is half the length, b is half the width, and c  is half the depth).


Processing Description

We calculated volume consumed as an ellipsoid (4/ 3*pi*abc, where a  is half the length, b is half the width, and c is half the depth).

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/yyyy to yyyymmdd.
  • adjusted NA values to nd for BCO-DMO system.

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Related Publications

McKeon, C. S., Stier, A. C., McIlroy, S. E., & Bolker, B. M. (2012). Multiple defender effects: synergistic coral defense by mutualist crustaceans. Oecologia, 169(4), 1095–1103. doi:10.1007/s00442-012-2275-2
General

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Parameters

ParameterDescriptionUnits
DateDate of experiment (in yyyymmdd format) unitless
TreatmentTreatment applied (1: No exosymbionts; 2: Alpheus (Pair of Alpheus lottini only); 3: Trapezia (Pair of Trapezia serenei only ); 4: Alpheus + Trapezia (Pair of Alpheus lottini and pair of Trapezia serenei)) unitless
LocationLocation of culcita (side; top) unitless
CircHorzHorizontal circumference of i centimeters (cm)
CircVertVertical circumference of Pocillopora cf. meandrina centimeters (cm)
LengthLength of experimental coral colonies centimeters (cm)
WidthWidth of experimental coral colonies centimeters (cm)
HeightHeight of experimental coral colonies centimeters (cm)
VolumeThe volumes of corals used in the deterrence trials cubic centimeters (cm^3)
Surface_Area_RectangleSurface area of experimental coral colonies square centimeters (cm^2)
Culcita_DiameterDiameter of Culcita novaeguineae used in experiment centimeters (cm)
Predation_BinaryPresence or absence of predation event unitless
PredWidthWidth of feeding scar centimeters (cm)
PredHeightHeight of feeding scar centimeters (cm)
PredDepthDepth of feeding scar centimeters (cm)
PredCircCircumference of feeding scar centimeters (cm)
PredvolumerecVolume consumed calculated as: 4/3(pi)*PredWidth*PredHeight*
PredDepth cubic centimeters (cm^3)
Proportion_vol_eatenPredvolumerec/Volume unitless (percent)
Predation_LocationLocation of feeding scars on experimental coral colony unitless

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Deployments

Osenberg_et_al_Moorea

Website
Platform
Osenberg et al Moorea
Start Date
2003-05-19
End Date
2015-07-12


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Project Information

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

Coverage: Moorea, French Polynesia (-17.48, -149.82)


Description from NSF award abstract:
Ecologists have long been interested in the factors that drive spatial and temporal variability in population density and structure. In marine reef systems, attention has focused on the role of settlement-the transition of pelagic larvae to a benthic stage-and on density-dependent processes affecting recently settled juveniles. Recent data suggest that co-variance in settlement and subsequent density-dependent survival can obscure the patterns of density dependence at larger scales, a phenomenon called cryptic density dependence. This research will explore the mechanisms that underlie the spatial covariance of settlement and site quality - a process that has received little attention in the standard paradigm. These mechanistic studies of cryptic density dependence will facilitate the development of new frameworks for fish population dynamics that incorporate larval ecology, habitat quality, density dependence, life history, and the patterns and implications of spatial covariance among these factors. More generally, the work provides a specific empirical context, and a general theoretical treatment, of cryptic heterogeneity (hidden individual variation in demographic rates).

Note: Drs. Craig W. Osenberg and Ben Bolker were at the University of Florida at the time the NSF award was granted. Dr. Osenberg moved to the University of Georgia during the summer of 2014 (current contact information). Dr. Bolker moved to McMaster University in 2010 (current contact information).



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Funding

Funding SourceAward
NSF Division of Ocean Sciences (NSF OCE)

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