Effect of arm regeneration on energy storage and gonad production in Ophiocoma echinata (Echinodermata: Ophiuroidea) |
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Authors: | C M Pomory J M Lawrence |
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Institution: | (1) Department of Biology, University of South Florida, Tampa, Florida 33620, USA, US |
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Abstract: | Two laboratory experiments were conducted on Ophiocoma echinata (Lamarck, 1816) collected from Missouri Key, Florida, USA, to ascertain the effects of arm regeneration on energy storage
and gonad production. In each experiment individuals were divided into non-regenerating (all arms intact) and regenerating
(three arms autotomized) groups and maintained together in a re-circulating seawater system for 2 mo. In Experiment 1, individuals
were fed once a week, and in Experiment 2 once every 2 wk. The amount of food energy required for maintenance was estimated
to be 0.172 kJ d−1. The lower feeding level (Experiment 2) was below maintenance ration and both groups lost material relative to an initial
group. At the higher feeding level (Experiment 1), regeneration of three arms resulted in less storage of organic material,
mainly lipid in the stomach, and less gonad production. Thus, regeneration may reduce energy reserves and reproductive output.
Received: 23 April 1998 / Accepted: 11 January 1999 |
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