Abstract
Shrimp production is the second ranked of the most-traded production in these decades and the whiteleg shrimp Litopenaeus vannamei is the sixth most cultured species. Probiotics are alternative strategy for the promotion of growth and prevention of diseases in aquaculture. To confirm the effects of the probiotics on development and microbial community of L. vannamei larvae during different development stages, five kinds of probiotics (108 ~ 109 CFU/g) were added into the rearing environment of shrimp larvae, and the effects of probiotics on bacterial community and water quality, larval growth and immune index were determined from nauplius larval stage to post larval stage. Results suggested that probiotics treated groups showed larger survival rate than the control groups from Z1 stage to P5 stage. Lactobacillus could improve the larvae’s survival ability, especially in the larval stages M2, M3, P1, P5 stage. It was confirmed that probiotics could promote the growth and development of shrimp larvae and prevent the incomplete molting in their growing process, particularly for EM-treated group. Results suggested that all the probiotics-treated groups had shown significant decreasing trend in the quantity of vibrios, except for the SA-treated group. And different probiotics could inhibit vibrios during different life periods. Among these probiotics, LA, EM and PB had shown the best effects, including improving survival rate of the larvae, promoting the larval metamorphosis, reducing the quantity of vibrios and NH4-N and NO2-N levels, and increasing bacterial diversity.
Highlights
Aquaculture is an important industry, which was one of the important sources of food and nutrition, and of livelihoods for human (Chumpol et al 2018)
The present study showed that the survival rates of the experimental groups, including effective microorganisms (EM), BA- and SA-treated groups, were higher than that of the control groups when the shrimp larvae developed from Z1 stage to P5 stage
With SPSS software, it suggested that the survival rate of LA-treated group was approximately 10% higher than that in the control groups (P < 0.05) in P5 stage, and photosynthetic bacteria (PB)-treated group was 9% higher than that in the control groups in P5 stage (P < 0.05), respectively
Summary
Aquaculture is an important industry, which was one of the important sources of food and nutrition, and of livelihoods for human (Chumpol et al 2018). Shellfish aquaculture occupies an important position in the world economy. Shrimp production is the second ranked of the most-traded production in these decades in aquaculture. Marine shrimp production have increased from less than 10.000 metric tonnes in 1970 to more than 4.000.000 metric tonnes in 2014. Pacific white shrimp (Litopenaeus vannamei) has accounted for 80% of the production (FAO 2016). L. vannamei, Penaeus monodon and Fenneropenaeus chinensis are the three major shrimp species cultured in China. Quantities of farms for culturing L. vannamei have increased rapidly because of high
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
