:: Volume 19, Issue 6 (2020) ::
IJFS 2020, 19 Back to browse issues page
Research Article: Spawning and larval rearing of red sea urchin Salmacis bicolor (L. Agassiz and Desor, 1846;Echinodermata: Echinoidea)
M. Gobala Krishnan, S.R. Radhika Rajasree *, M.G. Karthih, L. Aranganathan
Sathyabama Institute of Science and Technology , radhiin@gmail.com
Abstract:   (807 Views)
Gonads of sea urchin attract consumers due to its high nutritional value than any other seafood delicacies. Aquaculturists are also very keen on developing larval culture methods for large-scale cultivation. The present investigation systematically examined the larval rearing, development, survival and growth rate of Salmacis bicolor fed with various microalgal diets under laboratory condition. Fertilization rate was estimated as 95%. The blastula and gastrula stages attained at 8.25 h and 23.10 h post-fertilization. The 4 - armed pluteus larvae were formed with two well - developed post-oral arms at 44.20 h following post-fertilization. The 8 - armed pluteus attained at 9 days post fertilization. The competent larva with complete rudiment growth was developed on 25th days post - fertilization. Monodiet algal feed - Chaetoceros calcitrans and Dunaliella salina resulted medium (50.6 ± 2.7%) and low survival rate (36.8 ± 1.7%) of S. bicolor larvae. However, combination algal feed – Isochrysis galbana and Chaetoceros calcitrans has promoted high survival rate (68.3 ± 2.5%) which was significantly different between the mono and combination diet. From the observations of the study, combination diet could be adopted as an effective feed measure to promote the production of nutritionally valuable roes of S. bicolor.
Keywords: Sea urchin, Salmacis bicolor, Spawning, Embryo, Larvae, Microalgae
Full-Text [PDF 620 kb]   (281 Downloads)    
Type of Study: Orginal research papers | Subject: aquaculture
Received: 2019/02/26 | Accepted: 2019/05/12 | Published: 2020/11/20

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Volume 19, Issue 6 (2020) Back to browse issues page