Biological factors affecting sea survival of Atlantic salmon Salmo salar L., in Western Arm Brook and an analysis of selection by the commercial fishery of nearby St. Barbe Bay, Newfoundland
The problems faced by scientists in charge of managing Atlantic salmon (Salmo salar) stocks are : i) how to maintain spawning runs consisting of repeat spawners and large multi-sea-winter (MSW) adults in the face of selective homewater and distant commercial fisheries and , ii) how to more accuratel...
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Memorial University of Newfoundland
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ftmemorialuniv:oai:research.library.mun.ca:12142 2023-10-01T03:54:44+02:00 Biological factors affecting sea survival of Atlantic salmon Salmo salar L., in Western Arm Brook and an analysis of selection by the commercial fishery of nearby St. Barbe Bay, Newfoundland Sooley, Darrin Rex 1989-04 application/pdf https://research.library.mun.ca/12142/ https://research.library.mun.ca/12142/1/Sooley_DarrenRex.pdf en eng Memorial University of Newfoundland https://research.library.mun.ca/12142/1/Sooley_DarrenRex.pdf Sooley, Darrin Rex <https://research.library.mun.ca/view/creator_az/Sooley=3ADarrin_Rex=3A=3A.html> (1989) Biological factors affecting sea survival of Atlantic salmon Salmo salar L., in Western Arm Brook and an analysis of selection by the commercial fishery of nearby St. Barbe Bay, Newfoundland. Memorial University of Newfoundland. (Unpublished) thesis_license Other NonPeerReviewed 1989 ftmemorialuniv 2023-09-03T06:48:38Z The problems faced by scientists in charge of managing Atlantic salmon (Salmo salar) stocks are : i) how to maintain spawning runs consisting of repeat spawners and large multi-sea-winter (MSW) adults in the face of selective homewater and distant commercial fisheries and , ii) how to more accurately predict returns of adults. Using data from scales collected from maiden Atlantic salmon grilse from two locations on the Northern Peninsula of Newfoundland, St. Barbe Bay and Western Arm Brook, their length at smolting was back calculated. These data were then used to examine whether the St. Barbe commercial fishery is selective for salmon of particular smolt age and/or size. Analysis indicated that come commercial fishery selected larger, but not necessarily older adults that those escaping to Western Arm Brook over the period of this study, 1978-1987. It was determined that less than average size smolts survived better than above average size smolts. Slection for repeat spawners, large MSW salmon, and larger grilse has meant reductions in the proportions of these adults in the spawning runs on Western Arm Brook. This may impact the Western Arm Brook salmon stock by increasing the population instability. Sea survival was significantly correlated with selection by the commercial fishery. Characteristics of adults in Western Arm Brook during the period of study (1978-1987) did not help in explaining yearly variation in sea survival. The characteristics of smolts, however, when subjected to multiple regression analysis explained 57.2 percent of the yearly variation in sea survival. Text Atlantic salmon Newfoundland Salmo salar Memorial University of Newfoundland: Research Repository St Barbe ENVELOPE(-56.765,-56.765,51.200,51.200) Western Arm ENVELOPE(-55.948,-55.948,49.683,49.683) Western Arm Brook ENVELOPE(-56.448,-56.448,49.817,49.817) St. Barbe Bay ENVELOPE(-56.781,-56.781,51.217,51.217) |
institution |
Open Polar |
collection |
Memorial University of Newfoundland: Research Repository |
op_collection_id |
ftmemorialuniv |
language |
English |
description |
The problems faced by scientists in charge of managing Atlantic salmon (Salmo salar) stocks are : i) how to maintain spawning runs consisting of repeat spawners and large multi-sea-winter (MSW) adults in the face of selective homewater and distant commercial fisheries and , ii) how to more accurately predict returns of adults. Using data from scales collected from maiden Atlantic salmon grilse from two locations on the Northern Peninsula of Newfoundland, St. Barbe Bay and Western Arm Brook, their length at smolting was back calculated. These data were then used to examine whether the St. Barbe commercial fishery is selective for salmon of particular smolt age and/or size. Analysis indicated that come commercial fishery selected larger, but not necessarily older adults that those escaping to Western Arm Brook over the period of this study, 1978-1987. It was determined that less than average size smolts survived better than above average size smolts. Slection for repeat spawners, large MSW salmon, and larger grilse has meant reductions in the proportions of these adults in the spawning runs on Western Arm Brook. This may impact the Western Arm Brook salmon stock by increasing the population instability. Sea survival was significantly correlated with selection by the commercial fishery. Characteristics of adults in Western Arm Brook during the period of study (1978-1987) did not help in explaining yearly variation in sea survival. The characteristics of smolts, however, when subjected to multiple regression analysis explained 57.2 percent of the yearly variation in sea survival. |
format |
Text |
author |
Sooley, Darrin Rex |
spellingShingle |
Sooley, Darrin Rex Biological factors affecting sea survival of Atlantic salmon Salmo salar L., in Western Arm Brook and an analysis of selection by the commercial fishery of nearby St. Barbe Bay, Newfoundland |
author_facet |
Sooley, Darrin Rex |
author_sort |
Sooley, Darrin Rex |
title |
Biological factors affecting sea survival of Atlantic salmon Salmo salar L., in Western Arm Brook and an analysis of selection by the commercial fishery of nearby St. Barbe Bay, Newfoundland |
title_short |
Biological factors affecting sea survival of Atlantic salmon Salmo salar L., in Western Arm Brook and an analysis of selection by the commercial fishery of nearby St. Barbe Bay, Newfoundland |
title_full |
Biological factors affecting sea survival of Atlantic salmon Salmo salar L., in Western Arm Brook and an analysis of selection by the commercial fishery of nearby St. Barbe Bay, Newfoundland |
title_fullStr |
Biological factors affecting sea survival of Atlantic salmon Salmo salar L., in Western Arm Brook and an analysis of selection by the commercial fishery of nearby St. Barbe Bay, Newfoundland |
title_full_unstemmed |
Biological factors affecting sea survival of Atlantic salmon Salmo salar L., in Western Arm Brook and an analysis of selection by the commercial fishery of nearby St. Barbe Bay, Newfoundland |
title_sort |
biological factors affecting sea survival of atlantic salmon salmo salar l., in western arm brook and an analysis of selection by the commercial fishery of nearby st. barbe bay, newfoundland |
publisher |
Memorial University of Newfoundland |
publishDate |
1989 |
url |
https://research.library.mun.ca/12142/ https://research.library.mun.ca/12142/1/Sooley_DarrenRex.pdf |
long_lat |
ENVELOPE(-56.765,-56.765,51.200,51.200) ENVELOPE(-55.948,-55.948,49.683,49.683) ENVELOPE(-56.448,-56.448,49.817,49.817) ENVELOPE(-56.781,-56.781,51.217,51.217) |
geographic |
St Barbe Western Arm Western Arm Brook St. Barbe Bay |
geographic_facet |
St Barbe Western Arm Western Arm Brook St. Barbe Bay |
genre |
Atlantic salmon Newfoundland Salmo salar |
genre_facet |
Atlantic salmon Newfoundland Salmo salar |
op_relation |
https://research.library.mun.ca/12142/1/Sooley_DarrenRex.pdf Sooley, Darrin Rex <https://research.library.mun.ca/view/creator_az/Sooley=3ADarrin_Rex=3A=3A.html> (1989) Biological factors affecting sea survival of Atlantic salmon Salmo salar L., in Western Arm Brook and an analysis of selection by the commercial fishery of nearby St. Barbe Bay, Newfoundland. Memorial University of Newfoundland. (Unpublished) |
op_rights |
thesis_license |
_version_ |
1778522620760686592 |