The adaptive significance of lakeward migrations by juvenile Atlantic salmon, Salmo salar L.
Thesis (M.Sc.)--Memorial University of Newfoundland, 1985. Biology Bibliography: leaves 75-89. Freshwater migratory patterns of juvenile Atlantic salmon, Salmo salar, were examined to (1) quantify parr movements into and out of lakes, (2) determine the importance of lakes to smolt production, and (3...
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ftmemorialunivdc:oai:collections.mun.ca:theses2/47724 2023-05-15T15:29:17+02:00 The adaptive significance of lakeward migrations by juvenile Atlantic salmon, Salmo salar L. Hutchings, Jeffrey Alexander Memorial University of Newfoundland. Dept. of Biology 1985 x, 132 leaves : ill., map. Image/jpeg; Application/pdf http://collections.mun.ca/cdm/ref/collection/theses2/id/47724 Eng eng Electronic Theses and Dissertations (17.55 MB) -- http://collections.mun.ca/PDFs/theses/Hutchings_JeffreyAlexander.pdf http://collections.mun.ca/cdm/ref/collection/theses2/id/47724 The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission. Paper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries Atlantic salmon Atlantic salmon--Migration Fishes--Migration Text Electronic thesis or dissertation 1985 ftmemorialunivdc 2015-08-06T19:16:35Z Thesis (M.Sc.)--Memorial University of Newfoundland, 1985. Biology Bibliography: leaves 75-89. Freshwater migratory patterns of juvenile Atlantic salmon, Salmo salar, were examined to (1) quantify parr movements into and out of lakes, (2) determine the importance of lakes to smolt production, and (3) identify mechanisms permitting the sympatry of anadromous and resident salmon. Counting fences were maintained at the mouth of Wings Brook, Newfoundland, and at the outlets of its two associated lakes. There was a lake- and seaward movement of parr from early-May to late-September, intensifying over a 6-8 week period during spring when smolt emigrated from the lakes. Lacustrine parr returned to the stream following either maturation (usually males) or smoltification (predominantly females). Lakes contributed 87-100% of the system's smolt production, provided conditions for increased parr growth and survival, and represented important overwintering habitat. Lakeward migrations appear to be innately controlled but regulated by the environment. My observations support the hypothesis that co-occurring anadromous and resident S. salar represent phenotypic polymorphism within a single population. Thesis Atlantic salmon Newfoundland studies Salmo salar University of Newfoundland Memorial University of Newfoundland: Digital Archives Initiative (DAI) |
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Open Polar |
collection |
Memorial University of Newfoundland: Digital Archives Initiative (DAI) |
op_collection_id |
ftmemorialunivdc |
language |
English |
topic |
Atlantic salmon Atlantic salmon--Migration Fishes--Migration |
spellingShingle |
Atlantic salmon Atlantic salmon--Migration Fishes--Migration Hutchings, Jeffrey Alexander The adaptive significance of lakeward migrations by juvenile Atlantic salmon, Salmo salar L. |
topic_facet |
Atlantic salmon Atlantic salmon--Migration Fishes--Migration |
description |
Thesis (M.Sc.)--Memorial University of Newfoundland, 1985. Biology Bibliography: leaves 75-89. Freshwater migratory patterns of juvenile Atlantic salmon, Salmo salar, were examined to (1) quantify parr movements into and out of lakes, (2) determine the importance of lakes to smolt production, and (3) identify mechanisms permitting the sympatry of anadromous and resident salmon. Counting fences were maintained at the mouth of Wings Brook, Newfoundland, and at the outlets of its two associated lakes. There was a lake- and seaward movement of parr from early-May to late-September, intensifying over a 6-8 week period during spring when smolt emigrated from the lakes. Lacustrine parr returned to the stream following either maturation (usually males) or smoltification (predominantly females). Lakes contributed 87-100% of the system's smolt production, provided conditions for increased parr growth and survival, and represented important overwintering habitat. Lakeward migrations appear to be innately controlled but regulated by the environment. My observations support the hypothesis that co-occurring anadromous and resident S. salar represent phenotypic polymorphism within a single population. |
author2 |
Memorial University of Newfoundland. Dept. of Biology |
format |
Thesis |
author |
Hutchings, Jeffrey Alexander |
author_facet |
Hutchings, Jeffrey Alexander |
author_sort |
Hutchings, Jeffrey Alexander |
title |
The adaptive significance of lakeward migrations by juvenile Atlantic salmon, Salmo salar L. |
title_short |
The adaptive significance of lakeward migrations by juvenile Atlantic salmon, Salmo salar L. |
title_full |
The adaptive significance of lakeward migrations by juvenile Atlantic salmon, Salmo salar L. |
title_fullStr |
The adaptive significance of lakeward migrations by juvenile Atlantic salmon, Salmo salar L. |
title_full_unstemmed |
The adaptive significance of lakeward migrations by juvenile Atlantic salmon, Salmo salar L. |
title_sort |
adaptive significance of lakeward migrations by juvenile atlantic salmon, salmo salar l. |
publishDate |
1985 |
url |
http://collections.mun.ca/cdm/ref/collection/theses2/id/47724 |
genre |
Atlantic salmon Newfoundland studies Salmo salar University of Newfoundland |
genre_facet |
Atlantic salmon Newfoundland studies Salmo salar University of Newfoundland |
op_source |
Paper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries |
op_relation |
Electronic Theses and Dissertations (17.55 MB) -- http://collections.mun.ca/PDFs/theses/Hutchings_JeffreyAlexander.pdf http://collections.mun.ca/cdm/ref/collection/theses2/id/47724 |
op_rights |
The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission. |
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1766359663935225856 |