Proximate Composition and Allocation of Energy to Body Components in Acanthaster planci(Linnaeus) (Echinodermata: Asteroidea)(Biochemistry)

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Protein was the major constituent by weight in all body components. The concentration of lipid was twice as great in the pyloric caeca as in the cardiac stomach and cardiac pouches. The body wall of an arm contained more organic material and energy (in kJ) than the pyloric caeca within the arm. The body wall of the arms is the greatest portion of the entire body, but is less important in terms of wet weight than in kJ. The ventral body-wall of the disc is massive, containind ca. 17% as many kJ as the ventral body-wall of all 16 arms. The type and amount of organic constituents allocated to the body components of Acanthaster planci indicate the functional requirements of the components. The greater amount of energy allocated to the body wall of an arm than to the pyloric caeca suggests that an increase in arm number is not adaptive unless it results in an increased capacity to obtain energy.
社団法人日本動物学会の論文
1992-04-15