Precocious maturation and smoltification in wild atlantic salmon in the Armorican Massif France
In wild Atlantic salmon, Salmo salar, of Armorican rivers, precocious maturity occurred at <5% at age 0+ (males only). At 1+ (in both sexes) the percentage occurrence varied between years and stretches of river. Spawning marks on scales of smolts and anadromous adults confirmed that such fish smo...
| Published in: | Aquaculture |
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| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
1985
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| Subjects: | |
| Online Access: | http://prodinra.inra.fr/ft/6A550819-CF83-4ED7-98E1-CC671EBE6B69 http://prodinra.inra.fr/record/79625 https://doi.org/10.1016/0044-8486(85)90274-1 |
| Summary: | In wild Atlantic salmon, Salmo salar, of Armorican rivers, precocious maturity occurred at <5% at age 0+ (males only). At 1+ (in both sexes) the percentage occurrence varied between years and stretches of river. Spawning marks on scales of smolts and anadromous adults confirmed that such fish smoltify after spawning. From back-calculation from scales of R. Scorff salmon it was found that: (1) mature parr were larger than immature fish at 1+ in autumn and at smolting; (2) mature 1+ parr had been intermediate in length between upper and lower modal group fish in their first autumn. It is suggested that in western France a holobiotic cycle for the Atlantic salmon can occur before the amphibiotic one as an adaptive strategy. |
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