. Bulletin. Natural history; Natural history. Aug. 1981 SuLE ET AL.: Food Habits of Fishes 515 item for bluegills in the winter months was zooplankton. Aquatic plant use peak- ed in the spring and then declined as more aquatic and terrestrial insects were consumed until a peak in aquatic insect consumption occurred in the September- October period. Since bluegills smaller than 120 mm predominated the samples as well as in the population, their food habits considerably influenced any population-wide study. Seasonal trends for large, 140-159 mm, bluegill (Fig. 9) 100- 80- 60- 40 20-1 PLANTS â¡ =
. Bulletin. Natural history; Natural history. Aug. 1981 SuLE ET AL.: Food Habits of Fishes 515 item for bluegills in the winter months was zooplankton. Aquatic plant use peak- ed in the spring and then declined as more aquatic and terrestrial insects were consumed until a peak in aquatic insect consumption occurred in the September- October period. Since bluegills smaller than 120 mm predominated the samples as well as in the population, their food habits considerably influenced any population-wide study. Seasonal trends for large, 140-159 mm, bluegill (Fig. 9) 100- 80- 60- 40 20-1 PLANTS â¡ = INTAKE â ^ DISCHARGE. Fig. 9.âAverage weight percentages of major foods found in large bluegill (140-159 mm) from the intake and discharge arms of Lake Sangchris during different seasons of 1974 and i975. ^10 20 LU CO ii 1 100 o_ 1â (J3 80 1 1 J :s 1 1 1 50 n â =r rr LlJ > 40 [Ek TERRESTRIAL INSECTS ^ ^ rl JZL 20- â AQUATIC INSECTS J 100-1 80- 60- 40- 20- ZOOPLANKTON i 29 43 39 20 N-INTAKE 19 20 13 39 40 16 N-DISCHARGE 24 15 JAN/FEB MAR/APR MAY/JUNE JUL/AUG SEPT/OCT NOV/DEC. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
