Differences Between Two Populations of Landlocked Atlantic Salmon ( Salmo salar ) in Newfoundland
Differences in growth rates, longevity, fecundity, and time of spawning between two populations of landlocked Atlantic salmon (Salmo salar) in Newfoundland were attributed to food quality and quantity. Salmon in Flatwater Pond, an oligotrophic lake with a poor invertebrate population and no forage f...
Published in: | Journal of the Fisheries Research Board of Canada |
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Canadian Science Publishing
1969
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Online Access: | http://dx.doi.org/10.1139/f69-142 http://www.nrcresearchpress.com/doi/pdf/10.1139/f69-142 |
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crcansciencepubl:10.1139/f69-142 2023-12-17T10:27:22+01:00 Differences Between Two Populations of Landlocked Atlantic Salmon ( Salmo salar ) in Newfoundland Leggett, William C. Power, G. 1969 http://dx.doi.org/10.1139/f69-142 http://www.nrcresearchpress.com/doi/pdf/10.1139/f69-142 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Journal of the Fisheries Research Board of Canada volume 26, issue 6, page 1585-1596 ISSN 0015-296X General Medicine journal-article 1969 crcansciencepubl https://doi.org/10.1139/f69-142 2023-11-19T13:39:32Z Differences in growth rates, longevity, fecundity, and time of spawning between two populations of landlocked Atlantic salmon (Salmo salar) in Newfoundland were attributed to food quality and quantity. Salmon in Flatwater Pond, an oligotrophic lake with a poor invertebrate population and no forage fish, grew slowly (145 mm at age 2+, 245 mm at age 5+), suffered high mortality (approximately 60% in males after age 2+ and in females after age 3+), had very low fecundity (an average of 153 eggs per female), and were sexually mature by late August. Salmon in Gambo Pond, an oligotrophic lake with a good invertebrate population and an ample forage fish population in the form of Gasterosteus aculeatus, grew more rapidly reaching 157 mm at age 2+, 367 mm by age 5+, and 437 mm by age 8+. Longevity of the Gambo Pond stock was greater than that of Flatwater Pond (39.6% of the Gambo sample were older than 4+ years compared with 3.2% for Flatwater Pond). Gambo Pond salmon are not sexually mature until October.Salmon in both lakes exhibited seasonal movement into deeper water when the surface warmed above 14 C. At Flatwater Pond this movement contributed to an early end to the growing season.Scale reading was found to be an unreliable method for determining past spawning activity. Spawning marks were found on only 1 of 17 females known to have spawned previously. Article in Journal/Newspaper Atlantic salmon Newfoundland Salmo salar Canadian Science Publishing (via Crossref) Journal of the Fisheries Research Board of Canada 26 6 1585 1596 |
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Canadian Science Publishing (via Crossref) |
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English |
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General Medicine |
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General Medicine Leggett, William C. Power, G. Differences Between Two Populations of Landlocked Atlantic Salmon ( Salmo salar ) in Newfoundland |
topic_facet |
General Medicine |
description |
Differences in growth rates, longevity, fecundity, and time of spawning between two populations of landlocked Atlantic salmon (Salmo salar) in Newfoundland were attributed to food quality and quantity. Salmon in Flatwater Pond, an oligotrophic lake with a poor invertebrate population and no forage fish, grew slowly (145 mm at age 2+, 245 mm at age 5+), suffered high mortality (approximately 60% in males after age 2+ and in females after age 3+), had very low fecundity (an average of 153 eggs per female), and were sexually mature by late August. Salmon in Gambo Pond, an oligotrophic lake with a good invertebrate population and an ample forage fish population in the form of Gasterosteus aculeatus, grew more rapidly reaching 157 mm at age 2+, 367 mm by age 5+, and 437 mm by age 8+. Longevity of the Gambo Pond stock was greater than that of Flatwater Pond (39.6% of the Gambo sample were older than 4+ years compared with 3.2% for Flatwater Pond). Gambo Pond salmon are not sexually mature until October.Salmon in both lakes exhibited seasonal movement into deeper water when the surface warmed above 14 C. At Flatwater Pond this movement contributed to an early end to the growing season.Scale reading was found to be an unreliable method for determining past spawning activity. Spawning marks were found on only 1 of 17 females known to have spawned previously. |
format |
Article in Journal/Newspaper |
author |
Leggett, William C. Power, G. |
author_facet |
Leggett, William C. Power, G. |
author_sort |
Leggett, William C. |
title |
Differences Between Two Populations of Landlocked Atlantic Salmon ( Salmo salar ) in Newfoundland |
title_short |
Differences Between Two Populations of Landlocked Atlantic Salmon ( Salmo salar ) in Newfoundland |
title_full |
Differences Between Two Populations of Landlocked Atlantic Salmon ( Salmo salar ) in Newfoundland |
title_fullStr |
Differences Between Two Populations of Landlocked Atlantic Salmon ( Salmo salar ) in Newfoundland |
title_full_unstemmed |
Differences Between Two Populations of Landlocked Atlantic Salmon ( Salmo salar ) in Newfoundland |
title_sort |
differences between two populations of landlocked atlantic salmon ( salmo salar ) in newfoundland |
publisher |
Canadian Science Publishing |
publishDate |
1969 |
url |
http://dx.doi.org/10.1139/f69-142 http://www.nrcresearchpress.com/doi/pdf/10.1139/f69-142 |
genre |
Atlantic salmon Newfoundland Salmo salar |
genre_facet |
Atlantic salmon Newfoundland Salmo salar |
op_source |
Journal of the Fisheries Research Board of Canada volume 26, issue 6, page 1585-1596 ISSN 0015-296X |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f69-142 |
container_title |
Journal of the Fisheries Research Board of Canada |
container_volume |
26 |
container_issue |
6 |
container_start_page |
1585 |
op_container_end_page |
1596 |
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1785579204630282240 |