. The Canadian field-naturalist. 1979 Hanson and Qadri: Young-of-the-year Black Crappie 233 dioxide 8-15 mg/L, and pH ±; suspended solids vary greatly. In the bay, emergent vegetation consists of Sagit- taria latifolia, Scirpus sp., and Polygonum sp.; dense stands of Elodea sp. and Ceratophyllum sp. with scattered Potamogeton spp. occur from to about m; Potamogeton spp. and Nymphaea sp., with Elodea sp. and Ceratophyllum sp. growing under- neath, occur on the two humps (at and m) and from the sandbar to the south shore on the eastern end of the bay. This sandbar is flank
. The Canadian field-naturalist. 1979 Hanson and Qadri: Young-of-the-year Black Crappie 233 dioxide 8-15 mg/L, and pH ±; suspended solids vary greatly. In the bay, emergent vegetation consists of Sagit- taria latifolia, Scirpus sp., and Polygonum sp.; dense stands of Elodea sp. and Ceratophyllum sp. with scattered Potamogeton spp. occur from to about m; Potamogeton spp. and Nymphaea sp., with Elodea sp. and Ceratophyllum sp. growing under- neath, occur on the two humps (at and m) and from the sandbar to the south shore on the eastern end of the bay. This sandbar is flanked by thick beds of Vallisneria sp. Sampling for Black Crappies was done by towing a green mesh seine, by m. One end was fixed on shore as the other was towed out from shore and back by a boat with a 20-HP outboard motor. From the 2000 or more young captured on each sample date, only 30-35 were kept; these were sampled for lengths (mm), weight (g), scales, and stomach contents. Sampling was done at 2-wk intervals from May to October of 1977 and about 300 young were randomly selected for detailed examina- tion. Organisms from the stomachs offish captured in the field were identified (mostly at order level) and the number of organisms per fish, percent frequency, and percent volume were compiled on a monthly basis. Total length (mm) was used throughout. For com- parison to other studies, conversion factors for fork length and standard length were obtained as follows: SL = (based on 71 individual measurements) and FL - TL + (Figure2). Wet weights were taken to the nearest g. The anterior scale radius was measured with an ocular micrometer (40 X) and reduced to actual size in millimetres. Fulton's condition factor was calculated for each fish. The significance of the difference of sample means was determined by a /-test. Food and feeding habits of young Black Crappies were observed in the field and in the aquarium. From late June
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