Adult alewives (Alosa pseudoharengus) from Lake Michigan readily ate larval lake white-fish (Coregonus clupeaformis) of 16.3 mm (standard deviation 1.4 mm) average length in the laboratory. They ignored the larvae when the latter had grown to 19.5 mm (SD = 1.6 mm) and 24.9 mm (SD = 3.2 mm) average length.
A new drop net is described which samples a column of water from surface to bottom. The net is non‐sprung and falls freely to bottom. Surface pontoons release the net as a ring covering 182 m2; the net assumes a cylinder shape closed at the top, and then strains the water column as it descends. On bottom, the net is pursed and retrieved. A parachute effect combined with vertical vectors of downward force keeps the net at full aperture. Field tests with 1.0‐m and 15.2‐m diameter models in depths to 28 m were made in Green Bay, Lake Michigan. Details of net construction and the delivery device employed are provided.
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