Abstract
Quantitative bioenergetic and physiological measurements were made on juvenile rainbow trout Oncorhynchus mykiss exposed over summer (June-September 1993) to a simulated summer warming scenario of +2°C in the presence and absence of 70 μmol total ammonia/L (nominal; equivalent to 0.013 mg NH3-N/L at 15°C, pH = 7.6) to determine the metabolic costs and physiological consequences associated with their growth in a warmer, more polluted environment. With unlimited food, fish exposed to +2°C show better energy conversion efficiency and increased nitrogen retention at a metabolic cost equivalent to the base temperature group. Metabolic fuel use appears to have been optimized to support the bioenergetic demands imposed during maximum summer water temperatures. Low-level ammonia enhances nitrogen and energy conversion efficiency by stimulating protein retention, which ultimately results in the most cost-effective growth. However, in the +2°C ammonia treatment, the stimulatory effect of low-level ammonia is lost during mid to late summer due to the greater energy demands when fish are forced to cope with the additional stress of a small further increase in temperature.
| Original language | English |
|---|---|
| Pages (from-to) | 259-272 |
| Number of pages | 14 |
| Journal | Transactions of the American Fisheries Society |
| Volume | 126 |
| Issue number | 2 |
| State | Published - Mar 1 1997 |
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ASJC Scopus subject areas
- Aquatic Science
Cite this
The metabolic costs and physiological consequences to juvenile rainbow trout of a simulated summer warming scenario in the presence and absence of sublethal ammonia. / Linton, Tyler K.; Reid, Scott D.; Wood, Chris M.
In: Transactions of the American Fisheries Society, Vol. 126, No. 2, 01.03.1997, p. 259-272.Research output: Contribution to journal › Article
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TY - JOUR
T1 - The metabolic costs and physiological consequences to juvenile rainbow trout of a simulated summer warming scenario in the presence and absence of sublethal ammonia
AU - Linton, Tyler K.
AU - Reid, Scott D.
AU - Wood, Chris M.
PY - 1997/3/1
Y1 - 1997/3/1
N2 - Quantitative bioenergetic and physiological measurements were made on juvenile rainbow trout Oncorhynchus mykiss exposed over summer (June-September 1993) to a simulated summer warming scenario of +2°C in the presence and absence of 70 μmol total ammonia/L (nominal; equivalent to 0.013 mg NH3-N/L at 15°C, pH = 7.6) to determine the metabolic costs and physiological consequences associated with their growth in a warmer, more polluted environment. With unlimited food, fish exposed to +2°C show better energy conversion efficiency and increased nitrogen retention at a metabolic cost equivalent to the base temperature group. Metabolic fuel use appears to have been optimized to support the bioenergetic demands imposed during maximum summer water temperatures. Low-level ammonia enhances nitrogen and energy conversion efficiency by stimulating protein retention, which ultimately results in the most cost-effective growth. However, in the +2°C ammonia treatment, the stimulatory effect of low-level ammonia is lost during mid to late summer due to the greater energy demands when fish are forced to cope with the additional stress of a small further increase in temperature.
AB - Quantitative bioenergetic and physiological measurements were made on juvenile rainbow trout Oncorhynchus mykiss exposed over summer (June-September 1993) to a simulated summer warming scenario of +2°C in the presence and absence of 70 μmol total ammonia/L (nominal; equivalent to 0.013 mg NH3-N/L at 15°C, pH = 7.6) to determine the metabolic costs and physiological consequences associated with their growth in a warmer, more polluted environment. With unlimited food, fish exposed to +2°C show better energy conversion efficiency and increased nitrogen retention at a metabolic cost equivalent to the base temperature group. Metabolic fuel use appears to have been optimized to support the bioenergetic demands imposed during maximum summer water temperatures. Low-level ammonia enhances nitrogen and energy conversion efficiency by stimulating protein retention, which ultimately results in the most cost-effective growth. However, in the +2°C ammonia treatment, the stimulatory effect of low-level ammonia is lost during mid to late summer due to the greater energy demands when fish are forced to cope with the additional stress of a small further increase in temperature.
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M3 - Article
VL - 126
SP - 259
EP - 272
JO - Transactions of the American Fisheries Society
JF - Transactions of the American Fisheries Society
SN - 0002-8487
IS - 2
ER -