. The Canadian field-naturalist. 470 The Canadian Field-Naturalist Vol. 113 1991. li 0gravel-L D bedrock li nl Li 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 length (cm) - - 1992 u / â 0 gravel-L D bedrock â gravel-AB 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 length (cm) Figure 3. Precent length frequency (cm) of the Winter Flounder {Pleuronectes americanus), collected in Port Daniel Bay over gravel and bedrock substrates during the summer months of 1991 and 1992. (L = area near the
. The Canadian field-naturalist. 470 The Canadian Field-Naturalist Vol. 113 1991. li 0gravel-L D bedrock li nl Li 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 length (cm) - - 1992 u / â 0 gravel-L D bedrock â gravel-AB 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 length (cm) Figure 3. Precent length frequency (cm) of the Winter Flounder {Pleuronectes americanus), collected in Port Daniel Bay over gravel and bedrock substrates during the summer months of 1991 and 1992. (L = area near the Lighthouse, AB = area near Anse a la Barbe). Discussion A single fish community appears to occur in the subtidal zone of Port Daniel Bay over both gravel and bedrock. The logarithmic series suggests a mature community structure (Krebs 1989; Putman 1994). The single characteristic suggesting that the fish assemblages collected over each substratum dif- fered was the number of individuals within each species. However, two of the three most abundant species collected over each substratum were the same in>}991 while Winter Flounder dominated col- lections in 1992. Gill and trammel nets are highly size selective and provide only a relative sample of the fish communi- ty. With a wider range of gear, sampling a greater variety of sizes and spatial scales, it may be possible to determine differences that were unobserved dur- ing this 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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