. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. GROWTH IN A CLONAL INVERTEBRATE 275 r o ^ 7 0 ^ 62 51 3T6 ,o 23 12 T T 43 • T T • o >^ c- D ^> - * • ' ? T A \2 I m (D 0 •—s * 2'' 7 ;-M CO o 0_ i i i i i i i i i j i — i — i 5 10 15 20 25 30 35 40 45 50 5560+ Branch Size (cm Figure 4. The relationship between positive branch growth and initial branch size (r = ; P = ). Number of branches in each size class indicated above points. Error bars are ± one standard error. In a number of cases the error bars are smaller than the dots. Aver
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. GROWTH IN A CLONAL INVERTEBRATE 275 r o ^ 7 0 ^ 62 51 3T6 ,o 23 12 T T 43 • T T • o >^ c- D ^> - * • ' ? T A \2 I m (D 0 •—s * 2'' 7 ;-M CO o 0_ i i i i i i i i i j i — i — i 5 10 15 20 25 30 35 40 45 50 5560+ Branch Size (cm Figure 4. The relationship between positive branch growth and initial branch size (r = ; P = ). Number of branches in each size class indicated above points. Error bars are ± one standard error. In a number of cases the error bars are smaller than the dots. Average branch size in ramets of B. asbcstinniu is cm, which corresponds to 3-5 years of age. As shown in Figure 6, the difference between the growth strategies in this period is slight. In addition, the arborescent growth strategy would increase drag forces on the branches and further increase the probability of branches being lost. This simple graphical model predicts that branching spe- cies with high site tenacity will be arborescent. Species like B. asbcslinnni with low site tenacity, will reach re- productive age early, and should have branches with few bifurcations. Acknowledgments We thank the Kuna Indians and the Republic of Pan- ama for permission to work in the San Bias Islands and the Smithsonian Tropical Research Institute for the use of its facilities. M. A. Coffroth assisted with the fieldwork O i_ O Figure 5. P< ) 70 - 60 • 50 - Slope= cm/yr ( = ). 1 23456 Number of Branch Tips The relationship between positive branch growth and the number of tips/branch (r = ; Number of branches in each class indicated above points. Error bars are ± one standard 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.
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
