Thermal marking of Atlantic salmon otoliths
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Abstract
By exposing fry of Atlantic salmon Salmo salar to various temperature regimes, we determined conditions required to produce a readable thermal otolith mark. Marks were quantified by using a darkness index that represented the number of times darker the mark was than the background. Minimum requirements for a strong mark were 1 d at a relatively warm premark temperature of 9°C and 8 h at a lower marking temperature (1°C). Temperature decreases of 4°C (from 5°C to 1°C) resulted in strong marks if fish were held at the premark temperature for 4 d and at the marking temperature for at least 24 h.
Suggested Citation
Letcher, B., Terrick, T., 2011, Thermal marking of Atlantic salmon otoliths: North American Journal of Fisheries Management, v. 18, no. 2, p. 406-410, https://doi.org/10.1577/1548-8675(1998)018<0406:TMOASO>2.0.CO;2.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Thermal marking of Atlantic salmon otoliths |
| Series title | North American Journal of Fisheries Management |
| DOI | 10.1577/1548-8675(1998)018<0406:TMOASO>2.0.CO;2 |
| Volume | 18 |
| Issue | 2 |
| Year Published | 2011 |
| Language | English |
| Publisher | Wiley |
| Contributing office(s) | Leetown Science Center |
| Description | 5 p. |
| First page | 406 |
| Last page | 410 |
| Country | United States |
| State | Vermont |