关键词: 裸体方格星虫 , 人工育苗, 幼苗, Sipunculus nudus, artificial breeding, juvenile

Abstract: Abstract：The results of large-scale artificial breeding of Sipunculus nudus from 2008 to 2010 were reported in this paper. A certain amount of Sipunculus nudus parent were collected from the coastal sea along of Fujian from March to May each year，then get fertilized eggs through artificial induced spawning after parents enhancing cultivation. At water temperature of 28.5℃~30.5℃ and salinity of 26~32, the hatched pelagosphreic larvae were complete metamorphosis to nymph by 9-13days，and became juvenile with the body length of 1.0-2.8cm after more than a month larvae breeding. We have artificial breeding 1779000, 2880000 and 5526000 of Sipunculus nudus juvenile in body length 1.0-2.8cm in 2008，2009 and 2011，respectively.