Growth, survival and production of juvenile salmon and trout in a Scottish stream, 1966–75
Investigations of the growth, survival and production of young salmon Salmo salar , brown trout and sea trout S. trutta in sections of a stream in Scotland were made during 1966–75. At the end of the growing season, in autumn, the size of the 0+ salmon ranged from a mean weight of 1.12 g in 1966 to...
Published in: | Journal of Fish Biology |
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Language: | English |
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Wiley
1977
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Online Access: | http://dx.doi.org/10.1111/j.1095-8649.1977.tb05722.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1977.tb05722.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1977.tb05722.x |
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crwiley:10.1111/j.1095-8649.1977.tb05722.x 2024-09-15T18:33:04+00:00 Growth, survival and production of juvenile salmon and trout in a Scottish stream, 1966–75 Egglishaw, Henry J. Shackley, P. E. 1977 http://dx.doi.org/10.1111/j.1095-8649.1977.tb05722.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1977.tb05722.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1977.tb05722.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 11, issue 6, page 647-672 ISSN 0022-1112 1095-8649 journal-article 1977 crwiley https://doi.org/10.1111/j.1095-8649.1977.tb05722.x 2024-07-23T04:14:13Z Investigations of the growth, survival and production of young salmon Salmo salar , brown trout and sea trout S. trutta in sections of a stream in Scotland were made during 1966–75. At the end of the growing season, in autumn, the size of the 0+ salmon ranged from a mean weight of 1.12 g in 1966 to 2.82 g in 1973, and the size of the 0+ trout ranged from a mean of 2.20 g in 1966 to 3.56 g (68.0 mm) in 1974. Growth rates of 0+ salmon between July to September were similar from year to year, as was the case with the 0+ trout. The greater size attained in their first year by trout, resulted from the longer feeding season, provided by earlier emergence of fry and ability to continue growing in colder weather in autumn. The lengths attained by 0+ salmon and 0+ trout in September were related to the population densities of 0+ salmon and the number of days above 0° C from 1 December. There was no discernible relationship between lengths of 0+ trout and the population densities of 0+ trout. Salmon and trout lost weight during the winter, which was made up by April. The densities of 0+ salmon in June varied between 2–12m –2 . Rates of decrease of the population densities in their first year were related to their densities at the beginning of the season, and, more closely, to the densities of salmon and trout combined. At the end of the second year's growth there were between 0.06 and 0.25 salmon m –2 . Size of the trout populations varied less from year to year than those of salmon. The life of a year class of salmon and trout could be divided into several stages characterized by different rates of decrease of the population. Article in Journal/Newspaper Salmo salar Wiley Online Library Journal of Fish Biology 11 6 647 672 |
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Wiley Online Library |
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English |
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Investigations of the growth, survival and production of young salmon Salmo salar , brown trout and sea trout S. trutta in sections of a stream in Scotland were made during 1966–75. At the end of the growing season, in autumn, the size of the 0+ salmon ranged from a mean weight of 1.12 g in 1966 to 2.82 g in 1973, and the size of the 0+ trout ranged from a mean of 2.20 g in 1966 to 3.56 g (68.0 mm) in 1974. Growth rates of 0+ salmon between July to September were similar from year to year, as was the case with the 0+ trout. The greater size attained in their first year by trout, resulted from the longer feeding season, provided by earlier emergence of fry and ability to continue growing in colder weather in autumn. The lengths attained by 0+ salmon and 0+ trout in September were related to the population densities of 0+ salmon and the number of days above 0° C from 1 December. There was no discernible relationship between lengths of 0+ trout and the population densities of 0+ trout. Salmon and trout lost weight during the winter, which was made up by April. The densities of 0+ salmon in June varied between 2–12m –2 . Rates of decrease of the population densities in their first year were related to their densities at the beginning of the season, and, more closely, to the densities of salmon and trout combined. At the end of the second year's growth there were between 0.06 and 0.25 salmon m –2 . Size of the trout populations varied less from year to year than those of salmon. The life of a year class of salmon and trout could be divided into several stages characterized by different rates of decrease of the population. |
format |
Article in Journal/Newspaper |
author |
Egglishaw, Henry J. Shackley, P. E. |
spellingShingle |
Egglishaw, Henry J. Shackley, P. E. Growth, survival and production of juvenile salmon and trout in a Scottish stream, 1966–75 |
author_facet |
Egglishaw, Henry J. Shackley, P. E. |
author_sort |
Egglishaw, Henry J. |
title |
Growth, survival and production of juvenile salmon and trout in a Scottish stream, 1966–75 |
title_short |
Growth, survival and production of juvenile salmon and trout in a Scottish stream, 1966–75 |
title_full |
Growth, survival and production of juvenile salmon and trout in a Scottish stream, 1966–75 |
title_fullStr |
Growth, survival and production of juvenile salmon and trout in a Scottish stream, 1966–75 |
title_full_unstemmed |
Growth, survival and production of juvenile salmon and trout in a Scottish stream, 1966–75 |
title_sort |
growth, survival and production of juvenile salmon and trout in a scottish stream, 1966–75 |
publisher |
Wiley |
publishDate |
1977 |
url |
http://dx.doi.org/10.1111/j.1095-8649.1977.tb05722.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1977.tb05722.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1977.tb05722.x |
genre |
Salmo salar |
genre_facet |
Salmo salar |
op_source |
Journal of Fish Biology volume 11, issue 6, page 647-672 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1095-8649.1977.tb05722.x |
container_title |
Journal of Fish Biology |
container_volume |
11 |
container_issue |
6 |
container_start_page |
647 |
op_container_end_page |
672 |
_version_ |
1810474822498516992 |