Health & Environmental Research Online (HERO)


Print Feedback Export to File
6637854 
Journal Article 
Effects of co-supply ratios of swimming crab Portunus trituberculatus zoeae and Artemia on survival and growth of East Asian common octopus Octopus sinensis paralarvae under an upwelling culture system 
Dan, S; Iwasaki, H; Takasugi, A; Shibasaki, S; Yamazaki, H; Oka, M; Hamasaki, K; , 
2019 
Yes 
Aquaculture Research
ISSN: 1355-557X
EISSN: 1365-2109 
WILEY 
HOBOKEN 
50 
4 
1361-1370 
English 
WOS:000460678900036 
Despite recent advances in culture technology for East Asian common octopus Octopus sinensis paralarvae using upwelling systems, securing suitable feed for the paralarvae is an unresolved issue. The zoea of the swimming crab Portunus trituberculatus is a good candidate for paralarval feed because of the high fecundity of the adult females. To investigate the effects of supplying P. trituberculatus zoeae and their feeding method on paralarvae, we cultured paralarvae with supplying different combination ratios of zoeae and Artemia (10:0, 7:3, 5:5, 3:7 and 0:10), and with or without supplementing rotifers using small-scale (3-L) upwelling systems. Paralarval survival rate and growth were improved when zoeae were supplied as the main feed, but reduced when the proportion of Artemia exceeded half the whole preys. Supplementing rotifers did not affect the paralarval survival and growth. Subsequently, paralarvae were cultured by supplying zoeae (partially augmented by Artemia) using three large (1-kl) upwelling systems to assess their feeding effectiveness in juvenile octopus production. Paralarvae could be cultured at high survival rates of 77.1 +/- 5.1% to reach benthic juveniles at 23 days after hatching. In conclusion, supplying P. trituberculatus zoeae augmented with Artemia under an upwelling culture system has great potential for juvenile octopus production. 
Marine & Freshwater Biology; Artemia, common octopus paralarvae, juvenile octopus production,; Portunus trituberculatus zoea, upwelling culture system; fatty-acid-composition, vulgaris paralarvae, maja-brachydactyla,; life-cycle, cuvier, brachyura, food, zooplankton, performance,; cephalopods