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
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
复制标题
DOI：
10.1111/are.14013
复制
发表时间：
2019-04
影响因子：
2
通讯作者：
Shigeki Dan;H. Iwasaki;A. Takasugi;Shodai Shibasaki;H. Yamazaki;M. Oka;K. Hamasaki
中科院分区：
文献类型：
--
作者：
Shigeki Dan;H. Iwasaki;A. Takasugi;Shodai Shibasaki;H. Yamazaki;M. Oka;K. Hamasaki
尽管近年来利用上升流系统养殖东亚普通章鱼中华章鱼幼体的技术取得了进展，但为幼体提供合适的饲料仍是一个未解决的问题。三瘤梭子蟹（Portunus trituberculatus）雌梭子蟹成虫繁殖力高，是一种很好的产卵饵料。为了研究三瘤圆虫及其摄食方式对幼虫的影响，采用小规模（3‐L）上升流系统，分别饲喂不同比例（10∶0、7∶3、5∶5、3∶7和0∶10）的zoeae和Artemia组合，并饲喂轮虫和不饲喂轮虫。以青蒿为主要饲料可提高幼虫的成活率和生长，但当青蒿的比例超过总饵料的一半时，则会降低幼虫的成活率和生长。补充轮虫对幼虫的存活和生长没有影响。随后，使用三个大型（1‐kl）上升流系统，通过提供zoeae（部分添加Artemia）来培养幼虫，以评估它们在幼年章鱼生产中的摄食效果。孵育后23天，其成活率可达77.1±5.1%，为底栖幼鱼。综上所述，在上升流培养系统中，添加青蒿素的三管章鱼具有很大的幼章鱼生产潜力。
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.