. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 52 N. W. BLACKS I ONI 40- 35- 30 UJ 25 Q 20 15- 10. ;UM EN WIDTH AT MAX I MUM ectoderm pnrinrterm lumen width stolon width lumen cross-section \LUMENWIDTH AT MINI MUM 50 100 140 SECONDS 190 240 Figure 2. The contraction and expansion of the stolon lumen as it tills and empties largely in response to gastrovascular How,. Amplitude for each cycle corresponds to the diameter of the lumen. Schemata show transverse sections and cross sections of the stolon tip with the lumen at maximal and minimal width. In the region of the stol
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 52 N. W. BLACKS I ONI 40- 35- 30 UJ 25 Q 20 15- 10. ;UM EN WIDTH AT MAX I MUM ectoderm pnrinrterm lumen width stolon width lumen cross-section \LUMENWIDTH AT MINI MUM 50 100 140 SECONDS 190 240 Figure 2. The contraction and expansion of the stolon lumen as it tills and empties largely in response to gastrovascular How,. Amplitude for each cycle corresponds to the diameter of the lumen. Schemata show transverse sections and cross sections of the stolon tip with the lumen at maximal and minimal width. In the region of the stolon immediately behind the tip. the difference between the width of the stolon lumen when it is at a maximum (and fluid velocity is zero) and when it is at a minimum (and velocity is again zero) provides a measure of the rate of gastrovascular flow, if this difference is measured over time (modified from Blackstone Feeding manipulation experiments Eighteen newly explanted clonal replicates on 15-mm cover slips were randomly divided into three groups. Each group received a different number of feedings per week (2X, 3X [control], and 6X). The morphology of each colony was measured at the time the substratum became covered, when medusa production was initiated, and when the first medusae were released. Immediately preceding the first measure, gastrovascular flow to three stolon tips per colony was measured. The initiation of medusa production was defined as the day after the first medusa buds became visible on gonozooids of the col- ony. The time of the first release of medusae was defined as the day after maturing medusae ( tentacles ex- tended and swimming bell fully extended and contrac- tile) were first observed on gonozooids of the colony. L 'ncoupling experiments Eighteen newly explanted clonal replicates on 15-mm cover slips were randomly divided into three groups. Each group was treated with a different concentration of 2. 4-dinitrophenol in seawater (0 pM [control], \
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
