Samples were collected from open-water zone and of the main channel with a plankton net (150 mm mesh net, 1.3 m length, 0.25 m in mouth opening diameter), mounted on a pole in front of a boat, by horizontal tows and totaling 12 samples of 1 L each
Samples were collected from open-water zone and of the main channel with a plankton net (150 mm mesh net,1.3 m length, 0.25 m in mouth opening diameter), mounted on a pole in front of a boat, by horizontal tows and totaling 12 samples of 1 L each