Northern Squawfish,Ptychocheilus oregonensis, O2Consumption Rate and Respiration Model: Effects of Temperature and Body Size
| Autor: | Todd E. Hopkins, Daniel T. Castleberry, Joseph J. Cech, James H. Petersen |
|---|---|
| Rok vydání: | 1994 |
| Předmět: | |
| Zdroj: | Canadian Journal of Fisheries and Aquatic Sciences. 51:8-12 |
| ISSN: | 1205-7533 0706-652X |
| Popis: | Northern squawfish, Ptychocheilus oregonensis (live weight range 0.361–1.973 kg), O2consumption was measured with temperature-controlled, flow-through respirometers for >24 h. Mean standard O2consumption rate of northern squawfish increased with acclimation temperature: 24.3, 49.1, 75.0, and 89.4 mg∙kg−0.67∙h−1at 9, 15, 18, and 21 °C, respectively. Q10analysis showed that O2consumption rate temperature sensitivity was greatest at the intermediate acclimation temperatures (15–18 °C, Q10 = 4.10), moderate at the lower acclimation temperatures (9–15 °C, Q10 = 3.23), and lowest at the higher acclimation temperatures (18–21 °C, Q10 = 1.80). Overall Q10was 2.96 (9–21 °C). Body size (W, grams) and temperature (T, degrees Celcius) were related to O2consumption ([Formula: see text], grams per gram per day) by [Formula: see text]W−0.285∙e0.105T. Northern squawfish red to white muscle ratios significantly exceeded those of rainbow trout, Oncorhynchus mykiss, in cross sections at 50 and 75% of standard length. High metabolic rates and red to white muscle ratios argue for comparability of northern squawfish with active predators such as sympatric rainbow trout. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|