. The Canadian field-naturalist. P- Upper river Jf.^O Hawkesbury ^§(24)* (6) Lower river 0 3 4 5 6 Age in years 8 Figure 4. Back-calculated average length at each annulus of Brown Bullhead sexes combined, from the upper Ottawa River, lower river and near Hawkesbury during 1971. Vertical lines represent 95% confidence limits about the means. The number of fish at each annulus is given in parentheses. Age I based on measurements of Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appe
. The Canadian field-naturalist. P- Upper river Jf.^O Hawkesbury ^§(24)* (6) Lower river 0 3 4 5 6 Age in years 8 Figure 4. Back-calculated average length at each annulus of Brown Bullhead sexes combined, from the upper Ottawa River, lower river and near Hawkesbury during 1971. Vertical lines represent 95% confidence limits about the means. The number of fish at each annulus is given in parentheses. Age I based on measurements of 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 Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club
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