Observations on the shoaling behaviour of cod ( Gadus callarias ) in deep water relative to daylight
It is well known that vision is the main physical factor governing the formation and maintenance offish shoals, and that, in general, shoals break up when the light intensity falls below a certain level. Breder (1929, 1942), Newman (1876), Parr (1927, 1931), and others, have shown this by laboratory...
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)
1956
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Online Access: | http://dx.doi.org/10.1017/s0025315400010237 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400010237 |
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crcambridgeupr:10.1017/s0025315400010237 2024-03-03T08:43:05+00:00 Observations on the shoaling behaviour of cod ( Gadus callarias ) in deep water relative to daylight Ellis, G. H. 1956 http://dx.doi.org/10.1017/s0025315400010237 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400010237 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Journal of the Marine Biological Association of the United Kingdom volume 35, issue 2, page 415-417 ISSN 0025-3154 1469-7769 Aquatic Science journal-article 1956 crcambridgeupr https://doi.org/10.1017/s0025315400010237 2024-02-08T08:29:14Z It is well known that vision is the main physical factor governing the formation and maintenance offish shoals, and that, in general, shoals break up when the light intensity falls below a certain level. Breder (1929, 1942), Newman (1876), Parr (1927, 1931), and others, have shown this by laboratory experiment. During a commercial fishing voyage to the Barents Sea it became possible, by means of a recording echo-sounder, to study the shoaling behaviour of cod in deep water relative to light intensity. The observations were made aboard the Hull trawler Lancella whilst fishing in a depth of 110 fathoms at Skolpen Bank in September 1955. For this a Kelvin and Hughes recording echosounder type MS. 24J was used, the depth range across the chart being 55 fathoms. The scale was phased so that the region between 80 and 135 fathoms deep was displayed. Article in Journal/Newspaper Barents Sea Cambridge University Press Barents Sea Skolpen Bank ENVELOPE(37.000,37.000,70.750,70.750) Journal of the Marine Biological Association of the United Kingdom 35 2 415 417 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Aquatic Science |
spellingShingle |
Aquatic Science Ellis, G. H. Observations on the shoaling behaviour of cod ( Gadus callarias ) in deep water relative to daylight |
topic_facet |
Aquatic Science |
description |
It is well known that vision is the main physical factor governing the formation and maintenance offish shoals, and that, in general, shoals break up when the light intensity falls below a certain level. Breder (1929, 1942), Newman (1876), Parr (1927, 1931), and others, have shown this by laboratory experiment. During a commercial fishing voyage to the Barents Sea it became possible, by means of a recording echo-sounder, to study the shoaling behaviour of cod in deep water relative to light intensity. The observations were made aboard the Hull trawler Lancella whilst fishing in a depth of 110 fathoms at Skolpen Bank in September 1955. For this a Kelvin and Hughes recording echosounder type MS. 24J was used, the depth range across the chart being 55 fathoms. The scale was phased so that the region between 80 and 135 fathoms deep was displayed. |
format |
Article in Journal/Newspaper |
author |
Ellis, G. H. |
author_facet |
Ellis, G. H. |
author_sort |
Ellis, G. H. |
title |
Observations on the shoaling behaviour of cod ( Gadus callarias ) in deep water relative to daylight |
title_short |
Observations on the shoaling behaviour of cod ( Gadus callarias ) in deep water relative to daylight |
title_full |
Observations on the shoaling behaviour of cod ( Gadus callarias ) in deep water relative to daylight |
title_fullStr |
Observations on the shoaling behaviour of cod ( Gadus callarias ) in deep water relative to daylight |
title_full_unstemmed |
Observations on the shoaling behaviour of cod ( Gadus callarias ) in deep water relative to daylight |
title_sort |
observations on the shoaling behaviour of cod ( gadus callarias ) in deep water relative to daylight |
publisher |
Cambridge University Press (CUP) |
publishDate |
1956 |
url |
http://dx.doi.org/10.1017/s0025315400010237 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400010237 |
long_lat |
ENVELOPE(37.000,37.000,70.750,70.750) |
geographic |
Barents Sea Skolpen Bank |
geographic_facet |
Barents Sea Skolpen Bank |
genre |
Barents Sea |
genre_facet |
Barents Sea |
op_source |
Journal of the Marine Biological Association of the United Kingdom volume 35, issue 2, page 415-417 ISSN 0025-3154 1469-7769 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0025315400010237 |
container_title |
Journal of the Marine Biological Association of the United Kingdom |
container_volume |
35 |
container_issue |
2 |
container_start_page |
415 |
op_container_end_page |
417 |
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1792498517860679680 |