Document Type

Response or Comment

Publication Date

6-1-1994

Keywords

AUTOTOMY, REGENERATION, ECHINODERMATA, ASTEROIDEA, STARFISH, SEA STARS

Abstract

Arm autotomy in asteroids, as tail autotomy in vertebrates, typically occurs when the animal is attacked and appears to facilitate escape. One assumes autotomy has a cost, but it rarely has been demonstrated in the field in vertebrates and never demonstrated in asteroids. The concentration of lipid was 40 % less and the amount of kilojoules 85 % less in the pyloric caeca of the asteroid Stichaster striatus Muller & Troschel (Echinodermata: Asteroidea) with autotomized arms than in those of individuals with intact arms collected in the field. as the pyloric caeca are used as nutrient reserves, individuals with autotomized arms would have a lesser capacity to withstand low availability of food and, as the caecal reserves can be used for gametogenesis, a decreased capacity for reproduction.

Citation / Publisher Attribution

John M. Lawrence and A. Larrain. 1994. "The Cost of Arm Autotomy in the Starfish Stichaster-Striatus." Marine Ecology-Progress Series. 109: 311-313.

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