Effects of temperature changes on the endogenous rhythm of oxygen consumption in the Japanese flounder Paralichthys olivaceus

Abstract

The effects of temperature changes on the endogenous rhythm of oxygen consumption in the Japanese flounder Paralichthys olivaceus which were acclimated to 3, 14 or 20°C in advance were investigated. The oxygen consumption rate (OCR) of individuals (total length >28 cm) that were acclimated to 3°C, maintained a relatively low value of 6.9 ± 2.3 mL (mean ± SD) O2/kg ww (wet weight)/h till 5.8°C, which is considered a ‘minimum’ rate. Thereafter, the OCR gradually increased up to 18.7 mL O2/kg ww/h at the temperature of 10.6°C. The OCR of individuals acclimated to 14°C stabilized with 124.2 ± 24.1 mL O2/kg ww/h, when tested at the relatively constant temperature of 14.4 ± 0.17°C. Maximum entropy spectral analysis revealed that the peak OCR occurred at 23.9 h intervals, which could be a circadian rhythm. The mean OCR showed a peak at 06.00–08.00 hours. For the temperature above 25°C in which the fish were acclimated to 20°C, the rhythmic patterns of OCR were observed until the experimental temperature reached 26.4°C. For the temperature above 28.4°C, the metabolic activity rhythm of the OCR was dampened and then the OCR abruptly rose again. It is assumed that the oscillator of the endogenous rhythm lost the governing of normal metabolic activity in Japanese flounders above 28.4°C. These results suggest that the temperatures of around 5.8, 26.4 and 28.4°C are the ‘lower limit temperature’, ‘upper incipient lethal temperature’, and the ‘critical thermal maximum’, respectively, for the endogenous rhythm of oxygen consumption in the Japanese flounder.

Effects of temperature and salinity on oxygen consumption and ammonia excretion of juvenile miiuy croaker, Miichthys miiuy (Basilewsky)

“…Das et al (2005) also did not find the turning point at the four temperatures (26-36°C) tested for OCR in Labeo rohita fry. Q 10 has been recognized as a common value that reflects the adjustments related to the enzymatic and physiological requirements for energy when temperature increases within the natural range (Kita et al 1996;Manush et al 2004;Kim et al 2005). For metabolic rates of aquatic animals, Q 10 values are generally close to 2, suggesting that the metabolic rate increases twofold for a temperature change of 10°C.…”

“…Effects of temperature and/or salinity on oxygen consumption of fish have been well documented (Degani et al 1989;Iwama et al 1997;Via et al 1998;Claireaux and Lagardère 1999;Ding and Li 2000;Das et al 2004Das et al , 2005Manush et al 2004;Kim et al 2005). The metabolic rate of fish is indirectly measured as rate of oxygen consumption (Brett 1964;Brett and Groves 1979;Kutty 1968Kutty , 1981.…”

The effect of temperature on physiological energetics of a fast-growing selective strain and a hatchery population of the Pacific oyster (Crassostrea gigas )

“…The temperature coefficient is a parameter to describe the sensitivity of organisms to temperature increase, and the value of Q 10 can reflect the adjustments related to the enzymatic and physiological requirements for energy when temperature increases within the natural range (Kim, Yoon, Kim, Gil, & Lee, 2005;Tamayo et al, 2013). Q 10 values have been reported in many shellfish species, and the values of Q 10 for metabolic rates were generally close to two in aquatic animals, suggesting that the metabolic increases twofold for a temperature change of 10°C (Saucedo, Ocampo, Monteforte, & Bervera, 2004;Zheng, Jin, Li, Bai, & Dong, 2008).…”

Effects of temperature and salinity on oxygen consumption and ammonia excretion in different colour strains of the Manila clam,Ruditapes philippinarum

“…The value of Q 10 is a parameter to describe the sensitivity of organisms to temperature increase. Q 10 has been recognized as a common value that reflects the adjustments related to the enzymatic and physiological requirements for energy when temperature increases within the natural range (Manush, Pal, Chatterjee, Das & Mukherjee ; Kim, Yoon, Kim, Gil & Lee ; Zheng, Jin, Li, Bai & Dong ). For metabolic rates of aquatic animals, Q 10 values are generally close to 2, suggesting that the metabolic increases twofold for a temperature change of 10°C (Zheng et al .…”