Study the Science: Fishes

The fish trawl assessment program estimates the relative abundance (numbers) and biomass (weight), species composition, and biological information on benthic and pelagic marine fish and invertebrate communities within the study areas. Bottom and pelagic trawl nets are deployed at each station and towed for approximately 5 to 15 minutes at an approximate speed of 2 to 4 knots. On average a 15 minute trawl tow covers a distance of approximately 926 meters (3,050 ft.). State-of-the-art instrumentation records all trawl performance data during each tow, allowing an accurate estimate of area surveyed. Biologists sort the catch, weigh and count animals by species, and collect samples for studies of diet and ecosystem relationships. Common fish species seen in the trawl surveys in the Chukchi Sea are mostly small in size and include Arctic cod, Pacific sandlance, capelin and several species of sculpins. Common invertebrate species are numerous and include snow crab, a variety of sea stars, brittle stars and mollusks.

Interesting Fact:
Although most species of fish are small, amphipods grow quite large, are common in the Arctic and are an important prey of gray whales!

Investigators

Study Descriptions by Year

Reports


2011-2012

Jeff June

NRC, Inc.

Co-Principal Investigator

4039 21st Ave West, Ste 404

Seattle, WA 98199

206-285-3480

jjune@nrccorp.com

website

2009-2010

Brenda Holladay

UAF

Co-Principal Investigator

209C O'Neill

PO Box 757220

Fairbanks, AK 99775

907-474-5428

baholladay@alaska.edu

website

2010

Bob Meyer

LGL

Co-Principal Investigator

2000 W Int'l Airport Rd, #C1

Anchorage, AK 99502

website

2009-2010

Brenda Norcross, PhD

UAF

Principal Investigator

116 O'Neill

PO Box 757220

Fairbanks, AK 99775

907-474-7990

bnorcross@alaska.edu

website

2012: No information available

2011: No information available

2010: No information available

2009: No information available