Relationship between Water Temperature and Oxygen Consumption Rate of the Black Scraper Thamnaconus modestus

Abstract

The black scraper Thamnaconus modestus was a commercially important fish species in the 1980s, but suddenly its commercial significance decreased in the 1990s mainly due to continuous overfishing. Recently, in order to reverse the depleted stocks of the black scraper and help the species recover, seed production technology has emerged. This has led to the farming of the black scraper in several parts of the southern coast of Korea. Since detailed research on its metabolism in relation to water temperature has been scanty, this was the investigative focus of the present study. The standard metabolism rates of the black scraper (9-10 months old, total length = 22.6 ± 0.8 cm, wet weight = 140.3 ± 13.9 g) were measured at seven different water temperature settings (12, 15, 17, 20, 23, 26, 28 o C) to understand the relationship between metabolism and water temperature. Relationships between water temperature (WT) and oxygen consumption rate (OCR) were obtained as SOCR (weight-specific oxygen consumption rate) = 0.0117WT − 0.0135 (r 2 = 0.9351) and IOCR (oxygen consumption rate per individual) = 1.8160WT − 5.4007 (r 2 = 9428). The Q 10 (temperature sensitivity), an indicator of the sensitivity of biological function to temperature, was analyzed. In our experiment, when the water temperature increased, the Q 10 value decreased. The Q 10 value was 6.27 in waters where the temperature ranged from 12-15 o C and this was much higher than the values obtained in waters where temperatures ranged between (1) 15-23 o C and (2) 23-28 o C. Consequently, it was shown that the black scraper is a warm water species and inhabiting waters in the temperature range from 15-28 o C is deemed appropriate.

Stress response of olive flounder, Paralichthys olivaceus and Japanese croaker, Nibea japonica on changes of water temperature

“…WT, dissolved oxygen concentration (DO), and photoperiod are potent influences on feed consumption, metabolic rate and energy expenditure, and thus, on growth of poikilothermic vertebrates, including fish (Dutta, 1994;Elliott, 1982;Hur, 2018;Lee et al, 2014). Therefore, the effects of these environmental factors on fish growth and metabolism warrant thorough investigation.…”

“…Significantly, the WT is an essential factor so that it controls physiological factors; reproduction, nutritional metabolism, growth, etc. Therefore, its rapid variation makes change and break physical condition and homeostasis of fish (Barton & Iwama, 1991;Hur, 2018;Lee et al, 2014;Shin et al, 2018). Therefore, this study was performed to get primary data for repeated acute change of WT.…”

Effects of water temperature changes on oxygen consumption and hematological factors in olive flounder Paralichthys olivaceus

“…Water temperature (WT), dissolved oxygen (DO) concentration, and photoperiod influence feed consumption, metabolic rate, and energy expenditure, and thus effect the growth of poi-kilothermic vertebrates, including fish (Lee et al, 2014;Liyanage et al, 2018;Shin et al, 2018). Therefore, the effects of these environmental factors on fish growth and metabolism warrant thorough investigation.…”

“…Many authors have demonstrated effects of various factors such as WT, salinity, photoperiod, fish size, feed amount, and stress on oxygen requirements of fish (Forsberg, 1994;Lee et al, 2014;Shin et al, 2018;Wei et al, 2019). In particular, in the case of aquaculture, DO content is considered an important factor for determining carrying capacity and production (Jørgensen et al, 1991;Lee et al, 2014;Shin et al, 2018).…”

“…Many authors have demonstrated effects of various factors such as WT, salinity, photoperiod, fish size, feed amount, and stress on oxygen requirements of fish (Forsberg, 1994;Lee et al, 2014;Shin et al, 2018;Wei et al, 2019). In particular, in the case of aquaculture, DO content is considered an important factor for determining carrying capacity and production (Jørgensen et al, 1991;Lee et al, 2014;Shin et al, 2018). Moreover, DO content is a parameter used in the determination of density in aquaculture and live-fish transport, and to determine the amount of feed required (Buentello et al, 2000;Kim et al, 2011;Kim et al, 2018;Yang et al, 2017).…”