zodtrawl 9697pal dates at Palmer: 11 November to 4 April dates of sampling: 23 November to 4 April Targetted tow trawls to collect krill Zodiac trawls were conducted in the immediate Palmer area (Palmer grid; Smith, 1992.) The objective of the targetted tows was to collect krill for laboratory experiments. in file zodtrawl.record are the following variables: Event Tow Grid Date Time Begin Time End Day/Night Fishing Time Begin Latitude (°S) Begin Longitude (°W) End Latitude (°S) End Longitude (°W) Water Depth Cloud Cover Ice cover Depth interval Wire out Wire angle Vol fil (m3) Krill TL/MF? IGR# if done The individual files for each length frequency completed contain the number of krill in each 0.5 mm length increment from 9.5 mm to 58.5 mm. The volume of water filtered during the tow is calculated with the information from a General Oceanics flowmeter. The length frequency data is derived with the 'frequency' function in excel 5.0. Target tows were conducted every 10 d to 2 weeks to collect krill for growth experiments and length frequency determinations. Nets were deployed with a winch and A-frame from a Mark V zodiac, the Rubber Duke. For all zooplankton tows, a 1-m diameter, 500-µm mesh ring net was deployed. A targetted tow was performed when a krill school was detected with the 50 kHz furuno echosounder on board the Rubber Duke. Once the cod end was retrieved, krill to be used for live experiments were placed in several seawater-filled buckets or coolers, keeping densities as low as possible. Live krill were measured to the nearest 0.01 mm either under a dissection microscope (< 15 mm) or with digital calipers (> 15 mm). Palmer lter, zodiac trawling nearshore, krill ascii, comma separated variables http://www.icess.ucsb.edu/lter ~lter/data/9697pal/zodtrawl/ zodtrawl.record lf.hist/evt*.lfhist Robin M. Ross, Langdon B. Quetin R. Ross, L. Quetin JLJones, CT Shaw, D Conlin JLJones, CT Shaw, D Conlin, KL Haberman JLJones, RM Ross R. Ross 23 June 1999 Waters, K. J. and R. C. Smith, 1992. "Palmer LTER: A Sampling Grid for the Palmer LTER Program." Antarctic Journal of the United States 1992.

Datafile Form V1.2 for describing a data file.