Emergence of Baltic salmon, Salmo salar L., in relation to temperature: a laboratory study
Emergence pattern and developmental status at emergence of Baltic salmon fry from the Umeälven hatchery stock (63°50′N, 20°25′E) were studied at 6, 10 and 12°C in the laboratory. The number of days and degree days from hatching to 50% emergence decreased exponentially with increasing temperature. Sy...
| Published in: | Journal of Fish Biology |
|---|---|
| Main Author: | |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Wiley
1988
|
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1111/j.1095-8649.1988.tb05502.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1988.tb05502.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1988.tb05502.x |
| Summary: | Emergence pattern and developmental status at emergence of Baltic salmon fry from the Umeälven hatchery stock (63°50′N, 20°25′E) were studied at 6, 10 and 12°C in the laboratory. The number of days and degree days from hatching to 50% emergence decreased exponentially with increasing temperature. Synchronization of emergence increased with temperature. Optimal temperature for incubation of yolk‐sac alevins was 10°C, which resulted in the largest fry at emergence and the lowest death rate. Fry kept at 6°C had the lowest mean weight and at 12°C the highest death rate. The fry emerged at an earlier developmental state with more yolk at 12°C than at 6°C. The Baltic salmon had a faster developmental rate during the gravel‐phase, as compared to more southern Atlantic salmon populations. |
|---|