. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. BARNACLE BROODING ACTIVITY 35 C. SANTA CATALINA ISLAND. CDi? AMJJ ASO NDJ FMAMJJA SONDJ F'JFMAMJ J ASOND 1972 1973 1974 1976 FIGURE 2. Comparison of seasonal brooding activity with average weekly seawater temperatures for populations of Pollicipes polymerus at Pismo Beach (A), Latigo Point (B), and Santa Catalina Island (C). Vertical lines represent standard error of the means for high (circles) and low (triangles) intertidal samples. Changes in brooding activity at each site were compared with water temperature and body wei
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. BARNACLE BROODING ACTIVITY 35 C. SANTA CATALINA ISLAND. CDi? AMJJ ASO NDJ FMAMJJA SONDJ F'JFMAMJ J ASOND 1972 1973 1974 1976 FIGURE 2. Comparison of seasonal brooding activity with average weekly seawater temperatures for populations of Pollicipes polymerus at Pismo Beach (A), Latigo Point (B), and Santa Catalina Island (C). Vertical lines represent standard error of the means for high (circles) and low (triangles) intertidal samples. Changes in brooding activity at each site were compared with water temperature and body weights to determine the relative importance of these two factors on brooding in the field (Fig. 3). Brooding at Latigo Point was greatest when both temperature and food reserves were highest. Brooding at Santa Catalina Island occurred as food reserves were low, but as temperatures approached the optimum level. Correlation coefficients (Spearman rank) were calculated between brooding activity and each of these two independent variables, using data from both sites combined. Brooding was correlated more strongly with a change in temperature, toward the apparent optimal level (r, = +), than with body weight (rs = +). Laboratory experiments Results of experiment 1 (Fig. 4) indicated that water temperature had a greater effect on brooding than did food abundance. Food affected brooding under some. 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
