On the Biology of Calanus Finmarchicus XII. The Phosphorus Cycle: Excretion, Egg Production, Autolysis
It is shown that equilibrium of 32 P throughout the body of Calanus is reached only after a feeding period of about a week. The time required to liberate by excretion the amount of P present in a Calanus is about 20 days. Fed Calanus excrete at a higher rate than starved. The implications of excreti...
Published in: | Journal of the Marine Biological Association of the United Kingdom |
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Language: | English |
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Cambridge University Press (CUP)
1961
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Online Access: | http://dx.doi.org/10.1017/s0025315400024000 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400024000 |
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crcambridgeupr:10.1017/s0025315400024000 2024-03-03T08:43:24+00:00 On the Biology of Calanus Finmarchicus XII. The Phosphorus Cycle: Excretion, Egg Production, Autolysis Marshall, S. M. Orr, P. Conover, R. J. 1961 http://dx.doi.org/10.1017/s0025315400024000 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400024000 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Journal of the Marine Biological Association of the United Kingdom volume 41, issue 2, page 463-488 ISSN 0025-3154 1469-7769 Aquatic Science journal-article 1961 crcambridgeupr https://doi.org/10.1017/s0025315400024000 2024-02-08T08:42:58Z It is shown that equilibrium of 32 P throughout the body of Calanus is reached only after a feeding period of about a week. The time required to liberate by excretion the amount of P present in a Calanus is about 20 days. Fed Calanus excrete at a higher rate than starved. The implications of excretion in feeding experiments using 32 P is discussed. There are large differences in the total P content of individual Calanus . Figures are given for ripe and unripe females, fat and lean Stage V, and eggs. A high percentage, up to 55% of the total P, may be lost by excretion during starvation. A high proportion of the P in the food assimilated (up to 70%) may appear within a week as eggs laid. Liberation of P from dead Calanus is very rapid and is almost complete in three days. The relation of excretion and autolysis to the P cycle in the sea is discussed. Article in Journal/Newspaper Calanus finmarchicus Cambridge University Press Journal of the Marine Biological Association of the United Kingdom 41 2 463 488 |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Aquatic Science |
spellingShingle |
Aquatic Science Marshall, S. M. Orr, P. Conover, R. J. On the Biology of Calanus Finmarchicus XII. The Phosphorus Cycle: Excretion, Egg Production, Autolysis |
topic_facet |
Aquatic Science |
description |
It is shown that equilibrium of 32 P throughout the body of Calanus is reached only after a feeding period of about a week. The time required to liberate by excretion the amount of P present in a Calanus is about 20 days. Fed Calanus excrete at a higher rate than starved. The implications of excretion in feeding experiments using 32 P is discussed. There are large differences in the total P content of individual Calanus . Figures are given for ripe and unripe females, fat and lean Stage V, and eggs. A high percentage, up to 55% of the total P, may be lost by excretion during starvation. A high proportion of the P in the food assimilated (up to 70%) may appear within a week as eggs laid. Liberation of P from dead Calanus is very rapid and is almost complete in three days. The relation of excretion and autolysis to the P cycle in the sea is discussed. |
format |
Article in Journal/Newspaper |
author |
Marshall, S. M. Orr, P. Conover, R. J. |
author_facet |
Marshall, S. M. Orr, P. Conover, R. J. |
author_sort |
Marshall, S. M. |
title |
On the Biology of Calanus Finmarchicus XII. The Phosphorus Cycle: Excretion, Egg Production, Autolysis |
title_short |
On the Biology of Calanus Finmarchicus XII. The Phosphorus Cycle: Excretion, Egg Production, Autolysis |
title_full |
On the Biology of Calanus Finmarchicus XII. The Phosphorus Cycle: Excretion, Egg Production, Autolysis |
title_fullStr |
On the Biology of Calanus Finmarchicus XII. The Phosphorus Cycle: Excretion, Egg Production, Autolysis |
title_full_unstemmed |
On the Biology of Calanus Finmarchicus XII. The Phosphorus Cycle: Excretion, Egg Production, Autolysis |
title_sort |
on the biology of calanus finmarchicus xii. the phosphorus cycle: excretion, egg production, autolysis |
publisher |
Cambridge University Press (CUP) |
publishDate |
1961 |
url |
http://dx.doi.org/10.1017/s0025315400024000 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400024000 |
genre |
Calanus finmarchicus |
genre_facet |
Calanus finmarchicus |
op_source |
Journal of the Marine Biological Association of the United Kingdom volume 41, issue 2, page 463-488 ISSN 0025-3154 1469-7769 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0025315400024000 |
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Journal of the Marine Biological Association of the United Kingdom |
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41 |
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2 |
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463 |
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488 |
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1792498824033337344 |