| Autor: |
Tipping, Jack M., Byrne, James B., Hillson, Todd D. |
| Předmět: |
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| Zdroj: |
North American Journal of Aquaculture; Oct2004, Vol. 66 Issue 4, p319-324, 6p, 3 Charts |
| Abstrakt: |
Juvenile steelhead Oncorhynchus mykiss were reared at two hatcheries in an attempt to determine the influence of loading (kg ⋅ L-1 ⋅ min-1) and density (kg/m³) on adult survival. Atone hatchery in which fish were reared and released from raceways for 3 years, there was no significant difference in recovery rates of fish reared at levels 20% below normal loadings and densities compared with those reared at 20% above normal loadings and densities. At a second hatchery in which fish were reared in ponds for 3 years before release, flows were adjusted so that loadings were similar but densities differed; a significant decrease was observed in returns of test fish when loading was 2.1 kg ⋅ L-1 ⋅ min-1 and density was 5.8 kg/m³, and returns greatly decreased when test fish loading was 2.3 kg ⋅ L-1 ⋅ min-1 and density was 6.3 kg/m³. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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