A study of the factors suspected to influence the grilse ratio of Atlantic salmon (salmo salar linnaeus)
The fact that some salmon spend only one year and a little more feeding in the sea before returning to their home river has been clearly demonstrated through scale reading and tagging experiments. These fish are called "grilse". In other words, a grilse usually enters its river of origin a...
Main Author: | |
---|---|
Other Authors: | |
Format: | Other/Unknown Material |
Language: | English |
Published: |
Université de Sherbrooke
1969
|
Subjects: | |
Online Access: | http://hdl.handle.net/11143/12013 |
id |
ftunivsherbrooke:oai:savoirs.usherbrooke.ca:11143/12013 |
---|---|
record_format |
openpolar |
spelling |
ftunivsherbrooke:oai:savoirs.usherbrooke.ca:11143/12013 2023-05-15T15:32:28+02:00 A study of the factors suspected to influence the grilse ratio of Atlantic salmon (salmo salar linnaeus) Tétreault, Bertrand Desrochers, Raymond 1969 http://hdl.handle.net/11143/12013 eng eng Université de Sherbrooke http://hdl.handle.net/11143/12013 © Bertrand Tétreault Salmonidés Saumons Truites Atlantique Océan|Poissons Mémoire 1969 ftunivsherbrooke 2021-12-24T15:30:33Z The fact that some salmon spend only one year and a little more feeding in the sea before returning to their home river has been clearly demonstrated through scale reading and tagging experiments. These fish are called "grilse". In other words, a grilse usually enters its river of origin after one complete year and part of a summer at sea (A.1+) whereas a fully grown salmon (the backbone of a salmon fishery) usually remains in the sea 25 or 26 months (A.2 or A.2+), 36, 37 or 38 months (A.3 or A.3+), and in some rare cases, 48, 49 or 50 months (A.4 or A.4+) up to 60, 61 or 62 months (A.5 or A.5+) n For the past twenty years, the conservation of Salmo salar L. in Swedish rivers has necessitated the erection of modem smolt rearing stations and the undertaking of expensive management programs elsewhere, in order to compensate for the loss of natural spawning and nursing areas which were destroyed, in one river after another, by the construction of hydro-electric power developments, or simply by the deterioration of the environment. Other/Unknown Material Atlantic salmon Salmo salar Université de Sherbrooke: Savoirs UdeS |
institution |
Open Polar |
collection |
Université de Sherbrooke: Savoirs UdeS |
op_collection_id |
ftunivsherbrooke |
language |
English |
topic |
Salmonidés Saumons Truites Atlantique Océan|Poissons |
spellingShingle |
Salmonidés Saumons Truites Atlantique Océan|Poissons Tétreault, Bertrand A study of the factors suspected to influence the grilse ratio of Atlantic salmon (salmo salar linnaeus) |
topic_facet |
Salmonidés Saumons Truites Atlantique Océan|Poissons |
description |
The fact that some salmon spend only one year and a little more feeding in the sea before returning to their home river has been clearly demonstrated through scale reading and tagging experiments. These fish are called "grilse". In other words, a grilse usually enters its river of origin after one complete year and part of a summer at sea (A.1+) whereas a fully grown salmon (the backbone of a salmon fishery) usually remains in the sea 25 or 26 months (A.2 or A.2+), 36, 37 or 38 months (A.3 or A.3+), and in some rare cases, 48, 49 or 50 months (A.4 or A.4+) up to 60, 61 or 62 months (A.5 or A.5+) n For the past twenty years, the conservation of Salmo salar L. in Swedish rivers has necessitated the erection of modem smolt rearing stations and the undertaking of expensive management programs elsewhere, in order to compensate for the loss of natural spawning and nursing areas which were destroyed, in one river after another, by the construction of hydro-electric power developments, or simply by the deterioration of the environment. |
author2 |
Desrochers, Raymond |
format |
Other/Unknown Material |
author |
Tétreault, Bertrand |
author_facet |
Tétreault, Bertrand |
author_sort |
Tétreault, Bertrand |
title |
A study of the factors suspected to influence the grilse ratio of Atlantic salmon (salmo salar linnaeus) |
title_short |
A study of the factors suspected to influence the grilse ratio of Atlantic salmon (salmo salar linnaeus) |
title_full |
A study of the factors suspected to influence the grilse ratio of Atlantic salmon (salmo salar linnaeus) |
title_fullStr |
A study of the factors suspected to influence the grilse ratio of Atlantic salmon (salmo salar linnaeus) |
title_full_unstemmed |
A study of the factors suspected to influence the grilse ratio of Atlantic salmon (salmo salar linnaeus) |
title_sort |
study of the factors suspected to influence the grilse ratio of atlantic salmon (salmo salar linnaeus) |
publisher |
Université de Sherbrooke |
publishDate |
1969 |
url |
http://hdl.handle.net/11143/12013 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
http://hdl.handle.net/11143/12013 |
op_rights |
© Bertrand Tétreault |
_version_ |
1766362959915778048 |