Effects of salinity and food on growth and survival rate of mangrove snail (\(\textit{Nerita balteata}\) Reeve, 1885) at the spat larvae stage

Mangrove snail (Nerita balteata) belongs to gastropoda species distributed in the coastal intertidal and offshore islands of Quang Ninh province. Although artificial seeds production this have been successful but still having a bottle neck as low survival rate process by veliger larvae are transformed into spat stage. Experiments were conducted determine effects salinity food on growth mangrove stage The results showed that optimal for developtment was 25‰ resulted absoluted 16.5 ± 2.19 µm/day 26.5 0.57% significantly higher compared other treatments. diet benthic microalgae (Navicula sp.) combined with formulated feed (AP0 Frippak) most suitable development at 25,7 1,28 µm/day; Whereas 32,3 2,52% than those