. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CONTROL REDUCED EXPOSURE CONTROL REDUCED LIGHT EXPERIMENT 1 EXPERIMENT 11 Figure 2. Design of transplant experiments to test sclerite plasticity in Briareum asbestimim. Damage types: control = undamaged, scar = 1- x 3-cm gouge, tip = 1-cm tip amputation. Experiment I (exposure and damage): control and reduced exposure racks. Experiment II (light and damage): control and reduced light racks. modice canmciilata (Polychaeta), which commonly feeds by a characteristic removal of branch tips (Vree- land and Lasker, 1989). Thus, ti
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CONTROL REDUCED EXPOSURE CONTROL REDUCED LIGHT EXPERIMENT 1 EXPERIMENT 11 Figure 2. Design of transplant experiments to test sclerite plasticity in Briareum asbestimim. Damage types: control = undamaged, scar = 1- x 3-cm gouge, tip = 1-cm tip amputation. Experiment I (exposure and damage): control and reduced exposure racks. Experiment II (light and damage): control and reduced light racks. modice canmciilata (Polychaeta), which commonly feeds by a characteristic removal of branch tips (Vree- land and Lasker, 1989). Thus, tip removal may be sim- ilar to the damage inflicted on colonies by worms. Yet, tip removal also lays bare a cross-sectional area of the colony, so amputation also mimics the end product of breakage resulting from heavy wave action. The original cortex material from each scar or tip amputation was preserved in 70% ethanol for later analysis. Because the number of samples was large, the experi- ment was set up over 2 days. Each day, 72 undamaged branches, 10 cm long, were collected from a shallow (1- 3 m) reef of high wave energy. To maximize the genetic diversity of the collection, divers swam linearly along the reef and sampled single branches from colonies that were separated from any others by at least 3 m. After collec- tion, the branches were suspended in flow-through mesh bags from the side of the boat at the nearby transplant site. They were then assembled onto racks (equal num- bers of damage types, randomized with respect to rack position) inside large containers of seawater in the boat, and each completed rack was immediately conveyed to the transplant site below. Virtually all branches began extending their polyps within 2 h of transplantation. Within a few weeks, the branches had attached them- selves to the racks and were growing as independent col- onies. The colonies were allowed to heal and grow for 9 weeks, and survival exceeded 95%. During the experi- ment, more
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