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pinskylab / OceanAdapt

Scripts and data for OceanAdapt website to visualize shifts in marine animal distributions
http://oceanadapt.rutgers.edu
MIT License
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Request swept area for NEUS #27

Closed mpinsky closed 9 years ago

mpinsky commented 9 years ago

@rBatt In our next update to the trawl data for NEUS, we should ask for towed area (or tow length & net width, or tow duration & tow speed & net width, whichever are available), so that we can do this correction ourselves.

mpinsky commented 9 years ago

Never mind, see email from Sean Lucey. However, we can now convert to kg/km2 for NEUS (use the standard swept area). Also great to know that the numbers are in 'Albatross equivalents' (their older boat).

Malin,

For older data, we tend to assume a standard swept area of 0.0384 km^2. For a good majority of the survey, we did not have net mensuration sensors to calculate the actual tow footprint. Since the Bigelow has come on-line, we do have those sensors and can have a much more accurate estimate of swept area by individual tow. That being said, the data I provided is converted to Albatross numbers so calculated an actual swept area for the Bigelow would be misleading.

Sean

Sean M. Lucey Fisheries Biologist U. S. Dept. of Commerce/NOAA/NMFS Northeast Fisheries Science Center 166 Water Street, Woods Hole, MA 02543 508-495-2011 (voice) 508-495-2232 (fax)