This study was conducted to evaluate the influence of tributyrin (TB) supplemented in diet on the growth, feed utilization and intestinal health of turbot (Scophthalmus maximus L.). Four experimental diets were formulated with TB at 0 mg/kg, 100 mg/kg, 200 mg/kg and 300 mg/kg levels respectively. A total of 2016 turbot (initial body weight: 31.22±0.05g) were randomly distributed into 12 tanks and fed the corresponding diets for 70d. Results showed that fish in 100 mg/kg group had significantly higher weight gain rate (WGR) and specific growth rate (SGR) than that in other groups (P<0.05). No significant differences were observed in survival rate (SR), feeding rate (FR), feed conversion ratio (FCR), condition factor (CF), hepatosomatic index (HSI), and viscerosomatic index (VSI) among all groups (P>0.05). There was no significant difference in intestinal superoxide dismutase (SOD) activities and intestinal malonaldehyde (MDA) contents among all treatments (P>0.05), while the highest SOD activity and the lowest MDA content were found in 100 mg/kg group. The height of intestinal fold in 100 mg/kg treatment was significantly higher than that in other groups (P<0.05). However, no significant difference existed in intestinal wall thickness among all groups (P>0.05). The present study suggested that 100 mg/kg TB inclusion level was recommended in the diets of turbot to promote the growth and improve the intestinal morphology structure and health in turbot.
As from January 2010 The Israeli Journal of Aquaculture-Bamidgeh (IJA) will be published exclusively as an on-line Open Access (OA) quarterly accessible by all AquacultureHub (http://www.aquaculturehub.org) members and registered individuals and institutions. Please visit our website (http://siamb.org.il) for free registration form, further information and instructions. This transformation from a subscription printed version to an on-line OA journal, aims at supporting the concept that scientific peer-reviewed publications should be made available to all, including those with limited resources. The OA IJA does not enforce author or subscription fees and will endeavor to obtain alternative sources of income to support this policy for as long as possible.
According to the current management status of laboratories, an open laboratory management system based on 2DPCA face recognition technology is developed. Within this system, the environment of the lab is monitored from multiple aspects such as temperature and humidity, light intensity, PM2.5. The ZigBee module is adopted to realize the check-in and access control, which can automatically record the attendance of laboratory personnel and save the inconvenience of recording information manually. 2DPCA face recognition technology is used to ensure the security and theft prevention of the laboratory. The nodes composed of IoT, various sensors and microcontrollers help with the collection, transmission and processing of data between modules. Simultaneously, the IoT website is developed to record and display the environmental information of the lab, and the information will be published to the public network in real time through the ipv6 web server, thus allowing the users to view the usage of the work station through the net page on their cell phones. The innovation of this system design lies in the involvement of 2DPCA face recognition technology, which not only ensures the laboratory safety but also solves the problem of students not being able to enter due to the dim lighting and low resolution in the evening. Besides, the 2DPCA technology’ ability to meet the demand of open laboratory management system is verified by the simulation and experimental verification.
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