. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 0 200 400 600 800 1000 Minimum Depth of Occurrence (m) Figure 3. Mean citrate synthase activity in mantle muscle declines significantly with increasing minimum depth of occurrence (m) in Califor- nian (solid circles, solid line; v = ; ' 23±0-32; r2 = ; P = ; n = 9) and Hawaiian (open circles, dashed line; y = *"' '"; r2 = ; P = ; n = 10) pelagic cephalopods. For comparison, mantle muscle CS activity for Loligo opalescens is also shown (X; units g *; Ballantyne et 1981).
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 0 200 400 600 800 1000 Minimum Depth of Occurrence (m) Figure 3. Mean citrate synthase activity in mantle muscle declines significantly with increasing minimum depth of occurrence (m) in Califor- nian (solid circles, solid line; v = ; ' 23±0-32; r2 = ; P = ; n = 9) and Hawaiian (open circles, dashed line; y = *"' '"; r2 = ; P = ; n = 10) pelagic cephalopods. For comparison, mantle muscle CS activity for Loligo opalescens is also shown (X; units g *; Ballantyne et 1981). Depth There was a strong decline in mean mantle muscle CS activity with increasing minimum depth of occurrence (Fig. 3) in species from both California (v = ~' ?2; r •• ; P •• = ; /; 9) and Hawaii (v *~106±057; r = ; P = ; n = 10). There was also a strong decline in mean ODH activity with in- creasing MDO (Fig. 4) in species from both California (y = X loV'54±a41; r2 = ; P = ; n = 9) and Hawaii (v = X 10VL60±1"; r' = ; P = ; n = 10). There were not significant relationships between CS or ODH and MDO in tin or arm tissue for either California. 0 2 4 6 8 10 Citrate Synthase (units g"1) Figure 2. Correlation between mean citrate synthase activity (units g~') and mean mass-specific oxygen consumption rate ( O2 g h ; Seibel et al., 1997) for pelagic cephalopods. The regression is significant (y = + , r2 = ; P = ; n = 21). or Hawaii (P > ). Included in these analyses were Vampyroteuthis infemails (Seibel et 1998) and Gonatus onyx (Hunt and Seibel, 2000). Citrate synthase (v : ~066±063; r = ; P = ; n = 9) and ODH (Kendall rank correlation coefficient; P = ) activity in branchial heart tissue also declined significantly with in- 1000! >, > -"10- 00 •S -1 u Q (U n '§• B u O 200 400 600 800 1000 Minimum Depth of Occurrence (m
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
