US Long-Term Ecological Research Network
Setting Nets
  1. Set nets in areas of high catch first, moving clockwise around the lake.
  2. GPS location of net
  3. Record dates in that location
  4. Number nets consecutively from first net set. (Nets do not need to be pulled in order they were set.) If a net is moved, keep the same number and add an a, b, c, etc after.
  5. Sketch net location on a map with the net number (keep with In-Boat data sheets)
Pulling Nets
  1. Take lake map with net numbers and In-Boat data sheet
  2. Record date, time, collectors names
  3. At each net, record net number, number of bags and any comments (note anything unusual)
  4. For a zero catch… note if the net was fishing (tipped over, twisted, etc). If there were no problems write NORMAL SET.
  5. Try to set the net in exactly the same location. (Over burlap if applicable)
Data Collection
** If there is not enough time, please follow this order for priority of data collection. **
Daily Catch
  1. Use Daily Catch sheet
  2. Record date, net number, bag number, number of bags from that net
  3. Weigh bags in kilograms. Record.
  4. Note if fish were kept for sex determination, length – weight or scales and the number kept.
Sex ratio
  1. Use Sex sheet
  2. Randomly select 2 nets. Sample 50 fish from each net.
  3. Record date and net number
  4. Weigh two empty buckets and record weight.
  5. Separate fish by sex. Try not to squeeze out eggs/sperm.
  6. Count number of males and females. Record.
  7. Weigh buckets with males or females in them. Record.
Length Weight
  1. Use Length Weight sheet
  2. Select a random net and sample 30 fish from it
  3. Record date, net number, if fish were frozen
  4. Record length, weight and sex.
  5. Compare to scale sheet. Collect scale sample if category is not filled. Pull scales from behind the dorsal fin. Note on data sheet that scales were taken. Scale envelopes should have date, length, weight, net number and sex of fish on them. 


LTER Keywords
Protocol Format
Protocol ID
Protocol Type