Research study 1
Rates of regeneration of arms in F. serratissima is studied at the Bamfield Marine Sciences Centre by amputating different numbers of arms from individuals, caging them at 25m depth, and monitoring regrowth at regular intervals. The arms are removed at a point close to a natural autotomy line, leaving a 1-cm stump. Results show that arm replacement is linear over time (see graph lower Left). Regeneration times are similar regardless of number of arms removed (up to 5). Thus, with more arm mass to regenerate the rate of tissue replacement is actually greater as more arms need to be replaced. Complete arm regeneration in the field takes about 9mo.
NOTE a description of the process of autotomy is available at LEARN ABOUT FEATHER STARS: PREDATORS & DEFENSES: AUTOTOMY
NOTE field temperature is not mentioned by the author, but is likely to be about 5-8oC
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