Dataset: Florida Straits 2014 & 2015 MOC4 Larval Fish Counts

Name: Counts of larval fishes collected by a 4m2 MOCNESS in a subtropical, pelagic environment from R/V F.G. Walton Smith cruises WS1406 and WS15161 in the Straits of Florida in 2014 and 2015 (OSTRICH)
Published: 2018-12-05
Keywords: biota, oceans

View Data: Data not available yet

Cite This Dataset

Spatial Extent: N:26.1208 E:-79.22671 S:24.2116183 W:-82.088827

Temporal Extent: 2014-05-28 - 2015-06-26

Project:

Spatial variability of larval fish in relation to their prey and predator fields: Patterns and interactions from cm to 10s of km in a subtropical, pelagic environment (OSTRICH)

Principal Investigator:

Robert K. Cowen (Oregon State University, OSU-HMSC)

Co-Principal Investigator:

Su Sponaugle (Oregon State University, OSU-HMSC)

Contact:

Miram Gleiber (Oregon State University, OSU-HMSC)

BCO-DMO Data Manager:

Shannon Rauch (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2018-12-05

Restricted:

Yes

Release Date:

2019-09-30

Validated:

Current State:

Final no updates expected

Counts of larval fishes collected by a 4m2 MOCNESS in a subtropical, pelagic environment from R/V F.G. Walton Smith cruises WS1406 and WS15161 in the Straits of Florida in 2014 and 2015 (OSTRICH)

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Description

Counts of larval fishes collected by a 4m2 Multiple Opening Closing Net and Environmental Sampling System (MOCNESS; MOC4) in a subtropical, pelagic environment.

Restricted dataset: Data are currently restricted pending publication of the manuscript. Please contact the PI for prior access.

Methods & Sampling

Larval fishes were collected at each station using a Multiple Opening Closing Net and Environmental Sensing System (MOCNESS, http://www.whoi.edu/instruments/viewInstrument.do?id=10008) with a 4 square meter opening and 1 mm mesh nets (MOC4). To capture larval fishes and mesozooplankton on a fine horizontal spatial scale, we sequentially fired each MOCNESS net every ~125-500 m. Traveling at a speed of 2 meters per second each MOC4 net sampled ~500-2600 cubic meters. We fired a total of five nets per tow. One net was open from the surface to depth (net zero), and four nets sampled discrete depths. At every station, this fine-scale net sampling was repeated with two MOC4 tows at 15 m and 30 m depth (randomized order), thus eight replicate tows per depth. Once onboard, the nets were rinsed with seawater and the contents of each cod end immediately preserved in 95% ethanol.

Data Processing Description

All larval fishes were separated out of the samples, enumerated, and stored for later taxonomic identification.

BCO-DMO Processing:
- added official cruise ID corresponding to the PI-provided cruise name;
- modified parameter names to conform with BCO-DMO naming conventions;
- formatted dates to mm/dd/yyyy and times to hh:mm:ss;
- replaced -999 with "nd" (meaning "no data");
- joined the station location data to the MOC data;
- 05-Dec-2018: replaced v1 of dataset with v2, which has corrections made to volume filtered.

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1419987

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
WS1406	OSTRICH 2014	2014-05-28	R/V F.G. Walton Smith	Robert K. Cowen (Chief Scientist)	data info
WS15161	OSTRICH 2015	2015-06-10	R/V F.G. Walton Smith	Robert K. Cowen (Chief Scientist)	data info

Instruments

MOCNESS

Supplied Name: MOC4

Supplied Description:

Instrument Type

Generic Name: MOCNESS

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/NETT0097/

Generic Description:

The Multiple Opening/Closing Net and Environmental Sensing System or MOCNESS is a family of net systems based on the Tucker Trawl principle. There are currently 8 different sizes of MOCNESS in existence which are designed for capture of different size ranges of zooplankton and micro-nekton Each system is designated according to the size of the net mouth opening and in two cases, the number of nets it carries. The original MOCNESS (Wiebe et al, 1976) was a redesigned and improved version of a system described by Frost and McCrone (1974).(from MOCNESS manual) This designation is used when the specific type of MOCNESS (number and size of nets) was not specified by the contributing investigator.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
study	Study type: Spatial, Lagrangian, or Eddy	unitless	brief_desc
tow_type	Tow type: S = shallow, M = middle, D = deep	unitless	brief_desc
tow_descrip	Description of tow area: NS = nearshore tow, Off = offshore tow	unitless	brief_desc
larval_fish_count	Number of larval fish in net	unitless	count
cruise_id	Official cruise identifier	unitless	cruise_id
cruise_name	Cruise name	unitless	cruise_name
date	Date of tow (EDT) in mm/dd/yyyy format	unitless	date
depth_close	Depth net closed	meters (m)	depth_end
depth_open	Depth net opened	meters (m)	depth_open
lat_start	Latitude when net tow started	decimal degrees	lat
lat_end	Latitude when net tow ended	decimal degrees	lat
lon_start	Longitude when net tow started	decimal degrees	lon
lon_end	Longitude when net tow ended	decimal degrees	lon
net	MOC4 tow net number	unitless	net
rep	Replicate MOC4 tow at each station	unitless	replicate
area	Eddy region sampled	unitless	site_descrip
location	In = inside eddy tow, Ed = eddy edge tow, Out = outside eddy tow	unitless	site_descrip
station	Station identifier	unitless	sta
time_closed	Time (24h) net closed (EDT) in hh:mm:ss format	unitless	time_end
day_or_night	D = daytime tow, N = nighttime tow	unitless	time_of_day
time_open	Time (24h) net opened (EDT) in hh:mm:ss format	unitless	time_open
tow_vol	Colume of water towed by net; "nd" if volume was not recorded.	cubic meters (m^3)	vol_filt

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Dataset: Florida Straits 2014 & 2015 MOC4 Larval Fish Counts