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1945•Acta Physiologica ScandinavicaRequires access

Rate of Renewal of the Fish Skeleton

G. HEVESY

Open publisher page 8 citations

Abstract

Summary. Sticklebacks (Gasterosteus aculeatus) were kept for periods of up to one month in 3 litres of sea‐water containing labelled phosphate. A fish weighing 1 g was found to take up in the course of 16 days 1/40,000; part of the phosphorus present in the water, corresponding to 2.10‐5 mg P. By comparing the specific activity of the skeleton P with that of the free liver P, figures for the degree of the renewal of the skeleton were obtained. At least 95 per cent of the skeleton were found to remain unchanged during the experiment. The rate of renewal of the fish skeleton is thus much lower than that of the mammalian skeleton. The specific activity of the egg P being only slightly lower than that of the free liver P, we may conclude that the greater part of the P atoms present in the eggs was incorporated during the experiment.

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What this paper is about

Summary. Sticklebacks (Gasterosteus aculeatus) were kept for periods of up to one month in 3 litres of sea‐water containing labelled phosphate. A fish weighing 1 g was found to take up in the course of 16 days 1/40,000; part of the phosphorus present in the water, corresponding to 2.10‐5 mg P. By comparing the specific activity of the skeleton P with that of the free liver P, figures for the degree of the renewal of the skeleton were obtained. At least 95 per cent of the skeleton were found to remain unchanged during the experiment. The rate of renewal of the fish skeleton is thus much lower than that of the mammalian skeleton. The specific activity of the egg P being only slightly lower than that of the free liver P, we may conclude that the greater part of the P atoms present in the eggs was incorporated during the experiment.

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Available abstract

Summary. Sticklebacks (Gasterosteus aculeatus) were kept for periods of up to one month in 3 litres of sea‐water containing labelled phosphate. A fish weighing 1 g was found to take up in the course of 16 days 1/40,000; part of the phosphorus present in the water, corresponding to 2.10‐5 mg P. By comparing the specific activity of the skeleton P with that of the free liver P, figures for the degree of the renewal of the skeleton were obtained. At least 95 per cent of the skeleton were found to remain unchanged during the experiment. The rate of renewal of the fish skeleton is thus much lower than that of the mammalian skeleton. The specific activity of the egg P being only slightly lower than that of the free liver P, we may conclude that the greater part of the P atoms present in the eggs was incorporated during the experiment.

Key concepts: Skeleton (computer programming), Fish <Actinopterygii>, Gasterosteus, Biology, Phosphorus, Chemistry, Anatomy, Animal science

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