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 1m2 opening and 150um mesh nets (MOC1). To capture larval fishes and mesozooplankton on a fine horizontal spatial scale, we sequentially fired each MOCNESS net every ~120-150m. Traveling at a speed of 2 m s-1 each MOC1\u00a0net sampled ~120-150 m3. We fired a total of nine nets per tow. One net was open from the surface to depth (net zero), and eight nets sampled discrete depths. Net 0 was not enumerated for larval fish. Net 4 (or Net 5 in a few instances) did not have larval fish enumerated, as sample was collected for a collaborator. At every station, this fine-scale net sampling was repeated at 15m and 30m depth (randomized order). Once onboard, the nets were rinsed with seawater and the contents of each cod end immediately preserved in 95% ethanol. All larval fishes were separated out of the samples, enumerated, and stored for later SL measurements.\u00a0
Counts of larval fishes collected by a 1m2 Multiple Opening Closing Net and Environmental Sampling System (MOCNESS; MOC1) in a subtropical, pelagic environment from R/V F.G. Walton Smith cruise WS15161 in June 2015.
BCO-DMO data manager processing notes:
\nVersion 1 (2017-08-23):\u00a0\u00a0
\n- Originally submitted Excel file exported as csv
\n- Changed parameter names to BCO-DMO standards by using same param names as MOC4 dataset (OSTRICH)
\n- Added a cruise_id column consistent with other datasets in project
\n- Formatted tow_vol to 1 decimal place
\n- Added lat_start, lon_start, lat_end, lon_end columns
\n- Removed comment for Stn 10W net 1 \"net did not sample properly\" and replaced with \"nd\"
Version 2 (2020-03-31)\u00a0replaces version 1 (2017-08-23)
\n* ISO_DateTime_start_UTC column added from the date and time_start columns which were in EDT (UTC-4).
\n* Parameter descriptions removed for columns not in the data (tow_description, day_or_night, location)