. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. COLONY GROWTH OF POLYCLINUM 91 condition of P. planum. I also used linear regression to test for the effect of colony age on colony size. Results Potycliniim p/anum colonies were present on the re- search sites throughout the study. Recruitment and dis- lodgement of colonies occurred year-round, as did col- ony growth. The colonies did not fragment: each recruit produced only one pedunculate colony. During the study 211 P. planum colonies appeared at the study sites as recruits and became dislodged between 1 and 23 months la
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. COLONY GROWTH OF POLYCLINUM 91 condition of P. planum. I also used linear regression to test for the effect of colony age on colony size. Results Potycliniim p/anum colonies were present on the re- search sites throughout the study. Recruitment and dis- lodgement of colonies occurred year-round, as did col- ony growth. The colonies did not fragment: each recruit produced only one pedunculate colony. During the study 211 P. planum colonies appeared at the study sites as recruits and became dislodged between 1 and 23 months later. The mean value for maximum lobe-sil- houette area attained by those colonies was mm: (SD = mm:; n = 211 colonies). The largest of those colonies had a lobe-silhouette area of 8511 mm2 at 17 months of age. The mean post-recruitment life span of P. planum was months (SD = months: n = 211 colonies). The longest-lived colony on my sites persisted an exceptional 24 months. That colony did not become dislodged dur- ing the course of this study, so it was not used in analyses that included data only from colonies that did become dislodged. Mean growth trajectory Mean colony size was plotted against age in months to generate a growth trajectory for P. p/ainim (Fig. 2). The mean growth trajectory included a period of rapid growth throughout the first 10-12 months, followed by a period of attenuating growth to a mean maximum size of 1759 mm2 at month 15. The growth trajectory also indicated a decline in colony size among older colonies. Most colonies aged 14 months or older (21 of 27 colonies = ) decreased in lobe-silhouette area before being dislodged. The 21 colonies that experienced a size de- crease lost an average of (SD = ) of their maximum lobe-silhouette area prior to dislodgement. Some colonies decreased in size gradually, by abrasion; others lost larger pieces of their lobes, presumably in a single event, the explanation of which rema
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
