Dataset: Mussel Larvae Vertical Distribution

Name: Depth distribution of mussel larvae in eastern Gulf of Maine from R/V C-Hawk day cruises in the Eastern Gulf of Maine from 2012 to 2014
Published: 2019-12-20
Keywords: larvae, mussel, Mytilus, oceans

Cite This Dataset

DOI:10.1575/1912/bco-dmo.783755.1

Spatial Extent: N:44.657059 E:-67.340914 S:44.4091939 W:-67.6526958

Temporal Extent: 2012-08-01 - 2014-08-07

Project:

Intertidal community assembly and dynamics: Integrating broad-scale regional variation in environmental forcing and benthic-pelagic coupling (GOMEPRO)

Principal Investigator:

Philip O. Yund (Downeast Institute for Applied Marine Research and Education, DEI)

BCO-DMO Data Manager:

Amber D. York (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2019-12-20

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Depth distribution of mussel larvae in eastern Gulf of Maine from R/V C-Hawk day cruises in the Eastern Gulf of Maine from 2012 to 2014

Abstract:

Depth distribution of mussel larvae in eastern Gulf of Maine from R/V C-Hawk day cruises in the Eastern Gulf of Maine from 2012 to 2014

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2019-12-20	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.1575/1912/bco-dmo.783755.1	2020-01-03

Description

Depth distribution of mussel larvae in eastern Gulf of Maine from R/V C-Hawk day cruises in the Eastern Gulf of Maine from 2012 to 2014. These data were published in Weinstock et al., 2018 (see Fig 1, 2, 3, and 5).

Related Datasets: CTD casts were conducted immediately before and after the associated larval vertical distribution sampling and on both flood and ebb tides.
* CTD data for mussel study: https://www.bco-dmo.org/dataset/783736
* CTD cast log for mussel study: https://www.bco-dmo.org/dataset/783749

Methods & Sampling

Samples were collected by pumping 100L of water from specific depths and filtering the water through a 50 μm plankton net. Samples were preserved in ethanol. Bivalve veligers were sorted from other plankton and enumerated under a microscope. A random subset of approximately 33 veligers per sample were prepared for SEM and viewed. Veligers were identified to the family level based on previously published criteria for hinge tooth morphology and all veligers classified as mytillids were measured. Mytilus sp. veligers were distinguished from the much rarer Modiolus by established relationships between shell length and the number of hinge teeth. The total number of bivalve veligers was multiplied by the fraction identified as Mytilus sp. to yield the estimated number of Mytilus sp. larvae in each sample. This method did not allow us to distinguish Mytilus edulis larvae from Mytilus trossulus larvae, but the later species is rare in the bays that we sampled.

For more information see Weinstock et al. 2018.

Data Processing Description

BCO-DMO Data Manager Processing Notes:
* exported data from excel to csv file
* added a conventional header with dataset name, PI name, version date
* modified parameter names to conform with BCO-DMO naming conventions (spaces, +, and - changed to underscores). Units in parentheses removed and added to the Parameter Description metadata section.
* blank values in this dataset are displayed as "nd" for "no data." nd is the default missing data identifier in the BCO-DMO system.
* Start and end timestamp columns added (UTC) in ISO 8601 format.
* Date column converted to ISO 8601 format

Data Files

File
larvae.csv (Comma Separated Values (.csv), 22.92 KB) MD5:202c67719b441a1d3991564467ccd991 Primary data file for dataset ID 783755

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1458188

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
Yund_GoME		2012-08-01	R/V C-HAWK	Philip O. Yund (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
Sample_Date	Sample date in ISO 8601 format yyyy-mm-dd	unitless	date_utc
Site_name	Site name. Matches Fig. 1 in Weinstock et al. 2018	unitless	site
Latitude	Sample latitude	decimal degrees	lat
Longitude	Sample longitude	decimal degrees	lon
Start_time	Sample start time (UTC) in HH:MM	unitless	ISO_DateTime_UTC
End_time	Sample end time (UTC) in ISO 8601 format HH:MM	unitless	ISO_DateTime_UTC
Tidal_Phase	Tidal phase (Ebb or Flood tide)	unitless	site_descrip
Depth	Sample depth	meters	depth
num_Mytilus_sp	The number of Mytilus larvae as calculated by the methods of Weinstock et al. 2018. The total number of bivalve larvae in the sample was multiplied by the fraction determined to be Mytilus edulis or Mytilus trossulus (the two species could not be distinguished) based on scanning electron microscope (SEM) analysis of larval hinge teeth. These are the raw data used for analysis.	per individual	abundance
percent_of_Water_column_total	The percent of water column total is number of Mytilus sp. divided by the sum of the number of Mytilus sp. at that location, date, and tidal phase for samples collected in 2014, and 1/3 of that same sum for samples collected in 2012 and 2013 to remove the effect of triplicate samples at each depth. These data remove the effect of variation in total abundance among sampling dates/sites and are presented in Fig. 2 of Weinstock et al., 2018.	percent	abundance
Start_DateTime_UTC	Sample start datetime (UTC) in ISO 8601 format YYYY-mm-ddTHH:MMZ	unitless	ISO_DateTime_UTC
End_DateTime_UTC	Sample end datetime (UTC) in ISO 8601 format YYYY-mm-ddTHH:MMZ	unitless	ISO_DateTime_UTC