厚颌鲂幼鱼的胃排空特征及其数学模型研究

doi:10.16378/j.cnki.1003-1111.19160

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Abstract Gastric evacuation rate was determined for juvenile Megalobrama pellegrini, an endangered endemic fish species mainly found in the upper Yangtze River basin in China, and 300 experimental fish with boby weight of (38.17±2.45) g were removed from various intervals (0, 2, 4, 6, 8, 12, 16, 20, and 24 h) after satiation feeding at (15.0±0.3) ℃. The wet mass of the chyme was determined, and three mathematical models were used to get the best fitting data of gastric evacuation in juvenile M. pellegrini. By further comparing the residual squares (RSS) and the residual standard deviation (SDR), the square root model was shown to be the best model for expression gastric evacuation rate in this fish. Its regression equations for the wet mass of the chyme was expressed as y^0.5=0.951-0.036t (r²=0.899, P<0.001). According to the square root model, the gastric evacuation rate of juvenile M. pellegrini was 0.036 g/h, and 80% of the theoretical gastric emptying time was 14.83 h. Based on the above data, the optimal feeding interval could be 15 h for juvenile M. pellegrini at (15.0±0.3) ℃.

Key words： Megalobrama pellegrini mathematical model gastric evacuation rate digestion physiology

Received: 31 July 2019

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	Articles by authors
	QU Huantao
	LIAO Jianxin
	DAI Wei
	LIU Yong
	LU Xuebao
	YANG Yuanjin

Cite this article:

QU Huantao,LIAO Jianxin,DAI Wei, et al. Analysis of Gastric Evacuation Characteristics and Associated Mathematical Models in Juvenile Megalobrama pellegrini[J]. Fisheries Science, 2021, 40(4): 583-588.

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https://www.shchkx.com/EN/10.16378/j.cnki.1003-1111.19160 OR https://www.shchkx.com/EN/Y2021/V40/I4/583

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