Density of brown trout, Salmo trutta L., and Atlantic salmon, Salmo salar L., parr after point and scatter stocking of fry
Atlantic salmon, Salmo salar L., and brown trout, Salmo trutta L., fry were point and scatter stocked in the early part of June at densities of 63–263 fry 100 m −2 per species in the River Viantienjoki, a small river in northern Finland, and their population densities were assessed in late summer. B...
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crwiley:10.1046/j.1365-2400.1999.00163.x 2024-06-02T08:03:24+00:00 Density of brown trout, Salmo trutta L., and Atlantic salmon, Salmo salar L., parr after point and scatter stocking of fry Jokikokko, E. 1999 http://dx.doi.org/10.1046/j.1365-2400.1999.00163.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-2400.1999.00163.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2400.1999.00163.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Fisheries Management and Ecology volume 6, issue 6, page 475-486 ISSN 0969-997X 1365-2400 journal-article 1999 crwiley https://doi.org/10.1046/j.1365-2400.1999.00163.x 2024-05-03T11:03:02Z Atlantic salmon, Salmo salar L., and brown trout, Salmo trutta L., fry were point and scatter stocked in the early part of June at densities of 63–263 fry 100 m −2 per species in the River Viantienjoki, a small river in northern Finland, and their population densities were assessed in late summer. Both species were always stocked together in similar quantities. Point stocking was used in the first 2 years and scatter stocking in the following 2 years. In point stocking, there was no correlation between the distance from the stocking sites (maximum = 250 m) and parr density in census sites ( r = −0.013 and 0.019 for brown trout and Atlantic salmon, respectively). The stocking density of fry did not influence parr density in August by either method or by species. Stocking density explained only from 11% to 23% of the parr survival depending on the species or stocking method. The mean densities of Atlantic salmon and brown trout parr did not differ significantly from each other at any fishing site ( P > 0.05). Both point and scatter stocking appear to be suitable methods for use in small rivers. The parr densities depend more on the other factors (e.g. habitat quality) than the stocking method, and the choice between methods could be based on the time and labour available. Article in Journal/Newspaper Atlantic salmon Northern Finland Salmo salar Wiley Online Library Viantienjoki ENVELOPE(24.900,24.900,65.667,65.667) Fisheries Management and Ecology 6 6 475 486 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Atlantic salmon, Salmo salar L., and brown trout, Salmo trutta L., fry were point and scatter stocked in the early part of June at densities of 63–263 fry 100 m −2 per species in the River Viantienjoki, a small river in northern Finland, and their population densities were assessed in late summer. Both species were always stocked together in similar quantities. Point stocking was used in the first 2 years and scatter stocking in the following 2 years. In point stocking, there was no correlation between the distance from the stocking sites (maximum = 250 m) and parr density in census sites ( r = −0.013 and 0.019 for brown trout and Atlantic salmon, respectively). The stocking density of fry did not influence parr density in August by either method or by species. Stocking density explained only from 11% to 23% of the parr survival depending on the species or stocking method. The mean densities of Atlantic salmon and brown trout parr did not differ significantly from each other at any fishing site ( P > 0.05). Both point and scatter stocking appear to be suitable methods for use in small rivers. The parr densities depend more on the other factors (e.g. habitat quality) than the stocking method, and the choice between methods could be based on the time and labour available. |
format |
Article in Journal/Newspaper |
author |
Jokikokko, E. |
spellingShingle |
Jokikokko, E. Density of brown trout, Salmo trutta L., and Atlantic salmon, Salmo salar L., parr after point and scatter stocking of fry |
author_facet |
Jokikokko, E. |
author_sort |
Jokikokko, E. |
title |
Density of brown trout, Salmo trutta L., and Atlantic salmon, Salmo salar L., parr after point and scatter stocking of fry |
title_short |
Density of brown trout, Salmo trutta L., and Atlantic salmon, Salmo salar L., parr after point and scatter stocking of fry |
title_full |
Density of brown trout, Salmo trutta L., and Atlantic salmon, Salmo salar L., parr after point and scatter stocking of fry |
title_fullStr |
Density of brown trout, Salmo trutta L., and Atlantic salmon, Salmo salar L., parr after point and scatter stocking of fry |
title_full_unstemmed |
Density of brown trout, Salmo trutta L., and Atlantic salmon, Salmo salar L., parr after point and scatter stocking of fry |
title_sort |
density of brown trout, salmo trutta l., and atlantic salmon, salmo salar l., parr after point and scatter stocking of fry |
publisher |
Wiley |
publishDate |
1999 |
url |
http://dx.doi.org/10.1046/j.1365-2400.1999.00163.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-2400.1999.00163.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2400.1999.00163.x |
long_lat |
ENVELOPE(24.900,24.900,65.667,65.667) |
geographic |
Viantienjoki |
geographic_facet |
Viantienjoki |
genre |
Atlantic salmon Northern Finland Salmo salar |
genre_facet |
Atlantic salmon Northern Finland Salmo salar |
op_source |
Fisheries Management and Ecology volume 6, issue 6, page 475-486 ISSN 0969-997X 1365-2400 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1046/j.1365-2400.1999.00163.x |
container_title |
Fisheries Management and Ecology |
container_volume |
6 |
container_issue |
6 |
container_start_page |
475 |
op_container_end_page |
486 |
_version_ |
1800747912309768192 |