Change of digestive physiology in sea cucumber Apostichopus japonicus (Selenka) induced by corn kernels meal and soybean meal in diets

Abstract

The present study was conducted to determine the change of digestive physiology in sea cucumber Apostichopus japonicus (Selenka) induced by corn kernels meal and soybean meal in diets. Four experimental diets were tested, in which Sargassum thunbergii was proportionally replaced by the mixture of corn kernels meal and soybean meal. The growth performance, body composition and intestinal digestive enzyme activities in A. japonicus fed these 4 diets were examined. Results showed that the sea cucumber exhibited the maximum growth rate when 20% of S. thunbergii in the diet was replaced by corn kernels meal and soybean meal, while 40% of S. thunbergii in the diet can be replaced by the mixture of corn kernels meal and soybean meal without adversely affecting growth performance of A. japonicus. The activities of intestinal trypsin and amylase in A. japonicus can be significantly altered by corn kernels meal and soybean meal in diets. Trypsin activity in the intestine of A. japonicus significantly increased in the treatment groups compared to the control, suggesting that the supplement of corn kernels meal and soybean meal in the diets might increase the intestinal trypsin activity of A. japonicus. However, amylase activity in the intestine of A. japonicus remarkably decreased with the increasing replacement level of S. thunbergii by the mixture of corn kernels meal and soybean meal, suggesting that supplement of corn kernels meal and soybean meal in the diets might decrease the intestinal amylase activity of A. japonicus.

Effects of Dietary Zinc on Growth Performance, Digestive Enzyme Activities, Antioxidant Status, and Immune Responses of Sea Cucumber Apostichopus japonicus

“…Based on previous study on the feed for sea cucumber (Yu et al, 2016), this experiment made some modi cations to the formulate and con gured a basic diet with 20.49% crude protein and 2.69% crude lipid content using sargassum and sea mud as the main ingredients, as shown in Table 2. Zinc glycinate (Shanghai Yuanye Bio-Technology Co., Shanghai, China) was supplemented to the basal diet as Zn source in a gradient of 0, 20, 40, 60, and 80 mg/kg Zn content, of which the 0 mg/kg was the control group.…”

Responsible Fishmeal Consumption and Alternatives in the Face of Climate Changes

“…sunflower meal (Merida et al, 2011;Sultan et al, 2015), soyabean (Wu et al, 2016;Zhao et al, 2017;Wan et al, 2017;Yu et al, 2016), linseed meal (El-Saidy and Gaber, 2001;Soltan, 2005), canola (Slawski et al, 2013;Rajeev and Athithan, 2015), and cottonseed meal (Andreson et al, 2016;Ananyu et al, 2014), rapseed (Nagel et al, 2012;Slawski et al, 2012), pea meal (Collins et al, 2013;Fuertz et al, 2013;Gonzalez et al, 2016). However, the utilization of plant based proteins in aquafeeds resulted in a number of problems.…”