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Oxygen Consumption and Lethal Dissolved Oxygen Level of Hybrids of Siniperca chuatsi♀ × S. scherzeri♂

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Title: Oxygen Consumption and Lethal Dissolved Oxygen Level of Hybrids of Siniperca chuatsi♀ × S. scherzeri♂
Authors: Sun, Jijia
He, ianguo
Li, Guifeng
Liu, Li
Hou, Xiaocui $Wang, Pengfei
Keywords: Siniperca chuatsi hybrid
S. scherzeri
oxygen consumption rate
lethal dissolved oxygen level
circadian rhythm
LC Subject Headings: Fish culture--Israel.
Fish culture.
Issue Date: 2015
Abstract: Oxygen consumption rate (OCR) and lethal dissolved oxygen levels (DO) of the hybrids (225.3 ± 4.6 g) of Siniperca chuatsi ♀ × S. scherzeri ♂, were determined after acclimating the fish to 15, 20, 26 and 30°C for 20 days. The same parameters were measured for hybrids with different body weight (146.8 ± 6.3 g, 234.3 ± 8.4 g, 273.9 ± 3.3 g, 327 ± 5.1 g) at 26 °C. OCR increased significantly (P <0.05) with increasing acclimation temperature between 20-26°C, and decreased with increasing body weight. Final preferred temperature estimated from the Q10 was between 26-30°C. The lethal DO concentration for the hybrids at 30°C was significantly higher (P <0.05) than at other temperatures. OCR over the daily cycle under natural lighting conditions was also determined at 26°C. It showed a circadian rhythm with the lowest point at 0830 and peak rates at 1430. Results show that the hybrid has a higher stress tolerance and higher stocking density than the female parent S. chuatsi and indicate their culture potential in subtropical freshwater regions.
Pages/Duration: 7 pages
URI/DOI: http://hdl.handle.net/10524/49208
ISSN: 0792-156X
Appears in Collections:Volume 67, 2015



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