A Comparison of the Feeding Mechanisms of Calma Glaucoides and Nebaliopsis Typica
The feeding mechanism of the nudibranch Calma glaucoides (Alder & Hancock) has been described by Evans (1922) and that of the crustacean Nebaliopsis typica (Sars) by Cannon (1931) and myself (1943). Calma is seasonally relatively abundant in the coastal waters of parts of Europe where it is foun...
Published in: | Journal of the Marine Biological Association of the United Kingdom |
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1946
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Online Access: | http://dx.doi.org/10.1017/s0025315400012170 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400012170 |
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crcambridgeupr:10.1017/s0025315400012170 2024-03-03T08:39:18+00:00 A Comparison of the Feeding Mechanisms of Calma Glaucoides and Nebaliopsis Typica Rowett, H. G. Q. 1946 http://dx.doi.org/10.1017/s0025315400012170 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400012170 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Journal of the Marine Biological Association of the United Kingdom volume 26, issue 3, page 352-357 ISSN 0025-3154 1469-7769 Aquatic Science journal-article 1946 crcambridgeupr https://doi.org/10.1017/s0025315400012170 2024-02-08T08:29:13Z The feeding mechanism of the nudibranch Calma glaucoides (Alder & Hancock) has been described by Evans (1922) and that of the crustacean Nebaliopsis typica (Sars) by Cannon (1931) and myself (1943). Calma is seasonally relatively abundant in the coastal waters of parts of Europe where it is found attached to the eggs of certain fishes. It is known to feed exclusively on these eggs and young embryos. Nebaliopsis is a deep pelagic form from the Antarctic Ocean. It has been obtained only rarely and cannot be observed alive and in its natural environment. Two specimens were available for examination. Thus complete certainty about the diet is impossible. The external features and mouth parts were described by Cannon and the structure of these suggested that Nebaliopsis , like other known Nebaliacea, might be a filter feeder. Examination of the morphology of the gut and its contents indicates that this is very improbable. There is no mechanism for the sorting out of particles of different sizes such as is found in other filter feeders. The food passes into a blind sac and there is no apparent means by which the large quantities of indigestible material taken in when particles are filtered from the water indiscriminately might be evacuated. In addition to this negative evidence the food mass found in the large storage chamber of one specimen was completely homogeneous and structureless, its appearance in section suggesting coagulated yolk. It has therefore been suggested that Nebaliopsis feeds on fish eggs found floating in the deeper water layers. Article in Journal/Newspaper Antarc* Antarctic Antarctic Ocean Cambridge University Press Antarctic The Antarctic Antarctic Ocean Calma ENVELOPE(-65.833,-65.833,-65.967,-65.967) Journal of the Marine Biological Association of the United Kingdom 26 3 352 357 |
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Open Polar |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Aquatic Science |
spellingShingle |
Aquatic Science Rowett, H. G. Q. A Comparison of the Feeding Mechanisms of Calma Glaucoides and Nebaliopsis Typica |
topic_facet |
Aquatic Science |
description |
The feeding mechanism of the nudibranch Calma glaucoides (Alder & Hancock) has been described by Evans (1922) and that of the crustacean Nebaliopsis typica (Sars) by Cannon (1931) and myself (1943). Calma is seasonally relatively abundant in the coastal waters of parts of Europe where it is found attached to the eggs of certain fishes. It is known to feed exclusively on these eggs and young embryos. Nebaliopsis is a deep pelagic form from the Antarctic Ocean. It has been obtained only rarely and cannot be observed alive and in its natural environment. Two specimens were available for examination. Thus complete certainty about the diet is impossible. The external features and mouth parts were described by Cannon and the structure of these suggested that Nebaliopsis , like other known Nebaliacea, might be a filter feeder. Examination of the morphology of the gut and its contents indicates that this is very improbable. There is no mechanism for the sorting out of particles of different sizes such as is found in other filter feeders. The food passes into a blind sac and there is no apparent means by which the large quantities of indigestible material taken in when particles are filtered from the water indiscriminately might be evacuated. In addition to this negative evidence the food mass found in the large storage chamber of one specimen was completely homogeneous and structureless, its appearance in section suggesting coagulated yolk. It has therefore been suggested that Nebaliopsis feeds on fish eggs found floating in the deeper water layers. |
format |
Article in Journal/Newspaper |
author |
Rowett, H. G. Q. |
author_facet |
Rowett, H. G. Q. |
author_sort |
Rowett, H. G. Q. |
title |
A Comparison of the Feeding Mechanisms of Calma Glaucoides and Nebaliopsis Typica |
title_short |
A Comparison of the Feeding Mechanisms of Calma Glaucoides and Nebaliopsis Typica |
title_full |
A Comparison of the Feeding Mechanisms of Calma Glaucoides and Nebaliopsis Typica |
title_fullStr |
A Comparison of the Feeding Mechanisms of Calma Glaucoides and Nebaliopsis Typica |
title_full_unstemmed |
A Comparison of the Feeding Mechanisms of Calma Glaucoides and Nebaliopsis Typica |
title_sort |
comparison of the feeding mechanisms of calma glaucoides and nebaliopsis typica |
publisher |
Cambridge University Press (CUP) |
publishDate |
1946 |
url |
http://dx.doi.org/10.1017/s0025315400012170 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400012170 |
long_lat |
ENVELOPE(-65.833,-65.833,-65.967,-65.967) |
geographic |
Antarctic The Antarctic Antarctic Ocean Calma |
geographic_facet |
Antarctic The Antarctic Antarctic Ocean Calma |
genre |
Antarc* Antarctic Antarctic Ocean |
genre_facet |
Antarc* Antarctic Antarctic Ocean |
op_source |
Journal of the Marine Biological Association of the United Kingdom volume 26, issue 3, page 352-357 ISSN 0025-3154 1469-7769 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0025315400012170 |
container_title |
Journal of the Marine Biological Association of the United Kingdom |
container_volume |
26 |
container_issue |
3 |
container_start_page |
352 |
op_container_end_page |
357 |
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1792494764995641344 |