WL230, BLG Size Structure case study     Names:___________________________________

Length-frequency histograms depicting the size structure of bluegills collected in two consecutive years from Lake Louise, South Dakota, using two gears.  One gear was a trap (i.e., modified fyke) net with 1.2- X 1.5-m frames, dual throats, and 19-mm bar mesh.  The other sampling method was night electrofishing with pulsed DC electricity at approximately 250 V and 8 A.  Samples were collected in late May of both years at a water temperature of approximately 23-25°C.

Question:  Based on our discussion of trap netting and electrofishing, tell me which sample (Gear A or B) is from electrofishing, and which is from trap netting.  Why?