Influence of photoperiod and temperature on hatching and emergence of Baltic salmon ( Salmo salar L.)
The influence of photoperiod and temperature on hatching and emergence of Salmo salar L. was studied experimentally. Eggs were taken from a hatchery-reared Umeälven (Ume River) stock in northern Sweden (63°50′ N, 20°05′ E). Eggs kept in a light regime of 16L: 8D hatched mainly during the light perio...
Published in: | Canadian Journal of Zoology |
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Canadian Science Publishing
1987
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Online Access: | http://dx.doi.org/10.1139/z87-232 http://www.nrcresearchpress.com/doi/pdf/10.1139/z87-232 |
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crcansciencepubl:10.1139/z87-232 2023-12-17T10:47:33+01:00 Influence of photoperiod and temperature on hatching and emergence of Baltic salmon ( Salmo salar L.) Brännäs, Eva 1987 http://dx.doi.org/10.1139/z87-232 http://www.nrcresearchpress.com/doi/pdf/10.1139/z87-232 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 65, issue 6, page 1503-1508 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 1987 crcansciencepubl https://doi.org/10.1139/z87-232 2023-11-19T13:39:16Z The influence of photoperiod and temperature on hatching and emergence of Salmo salar L. was studied experimentally. Eggs were taken from a hatchery-reared Umeälven (Ume River) stock in northern Sweden (63°50′ N, 20°05′ E). Eggs kept in a light regime of 16L: 8D hatched mainly during the light period while eggs kept under conditions of no light hatched continuously over a 24-h period. Emergence of alevins from simulated redds kept under different LD regimes (light > 4 h) was well synchronized with the dark periods: the largest number of alevins left the gravel during the 1st h of darkness. In continuous darkness alevins exhibited a tendency for a persistent emergence pattern, i.e., the pattern resembled the photoperiod cycle to which they were previously exposed. Neither the length of the yolk sac phase nor the length of the emergence period among alevins was affected by photoperiod. In cold water (6.0 and 11.5 °C) emergence was mainly nocturnal. At high temperature (14.5 °C) the diel pattern of emergence switched and a major proportion of alevins left the gravel during the hours of light. In addition, at high temperatures the alevins spent a shorter time in the substrate and emerged during a short period of time compared with alevins emerging in cold water. The ecological implications of the influence of ambient temperature and photoperiod on emergence are discussed. Article in Journal/Newspaper Northern Sweden Salmo salar Canadian Science Publishing (via Crossref) Umeälven ENVELOPE(15.133,15.133,65.767,65.767) Canadian Journal of Zoology 65 6 1503 1508 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Brännäs, Eva Influence of photoperiod and temperature on hatching and emergence of Baltic salmon ( Salmo salar L.) |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
The influence of photoperiod and temperature on hatching and emergence of Salmo salar L. was studied experimentally. Eggs were taken from a hatchery-reared Umeälven (Ume River) stock in northern Sweden (63°50′ N, 20°05′ E). Eggs kept in a light regime of 16L: 8D hatched mainly during the light period while eggs kept under conditions of no light hatched continuously over a 24-h period. Emergence of alevins from simulated redds kept under different LD regimes (light > 4 h) was well synchronized with the dark periods: the largest number of alevins left the gravel during the 1st h of darkness. In continuous darkness alevins exhibited a tendency for a persistent emergence pattern, i.e., the pattern resembled the photoperiod cycle to which they were previously exposed. Neither the length of the yolk sac phase nor the length of the emergence period among alevins was affected by photoperiod. In cold water (6.0 and 11.5 °C) emergence was mainly nocturnal. At high temperature (14.5 °C) the diel pattern of emergence switched and a major proportion of alevins left the gravel during the hours of light. In addition, at high temperatures the alevins spent a shorter time in the substrate and emerged during a short period of time compared with alevins emerging in cold water. The ecological implications of the influence of ambient temperature and photoperiod on emergence are discussed. |
format |
Article in Journal/Newspaper |
author |
Brännäs, Eva |
author_facet |
Brännäs, Eva |
author_sort |
Brännäs, Eva |
title |
Influence of photoperiod and temperature on hatching and emergence of Baltic salmon ( Salmo salar L.) |
title_short |
Influence of photoperiod and temperature on hatching and emergence of Baltic salmon ( Salmo salar L.) |
title_full |
Influence of photoperiod and temperature on hatching and emergence of Baltic salmon ( Salmo salar L.) |
title_fullStr |
Influence of photoperiod and temperature on hatching and emergence of Baltic salmon ( Salmo salar L.) |
title_full_unstemmed |
Influence of photoperiod and temperature on hatching and emergence of Baltic salmon ( Salmo salar L.) |
title_sort |
influence of photoperiod and temperature on hatching and emergence of baltic salmon ( salmo salar l.) |
publisher |
Canadian Science Publishing |
publishDate |
1987 |
url |
http://dx.doi.org/10.1139/z87-232 http://www.nrcresearchpress.com/doi/pdf/10.1139/z87-232 |
long_lat |
ENVELOPE(15.133,15.133,65.767,65.767) |
geographic |
Umeälven |
geographic_facet |
Umeälven |
genre |
Northern Sweden Salmo salar |
genre_facet |
Northern Sweden Salmo salar |
op_source |
Canadian Journal of Zoology volume 65, issue 6, page 1503-1508 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z87-232 |
container_title |
Canadian Journal of Zoology |
container_volume |
65 |
container_issue |
6 |
container_start_page |
1503 |
op_container_end_page |
1508 |
_version_ |
1785571433680732160 |