Toshi's work

Study of Recirculation Semi Intensive Seed Production (RESISP) 1207 Masatoshi FUTAGAWA / CORDUNAP September 7, 2012 Based on SISP (semi intensive seed production) operation on October 2010, the method had disadvantages of difficulty of larva estimation. The method improved to RESISP that culture water at copepoda tank recirculates to separated larva tank. The trials are conducting from July 2012 and 2 nd trial is running now. There are some observations found and information below. RESISP1207 1 st trial was conducted 23 days from July 28 to August 13, 2012. The system consist copepod tank (20 m 3 ), two larva tanks (1 m 3 ) and pump (0.85kw, 3.8A). Copepod tank equip three air stones at 50 cm depth due to low air pressure, two airlifts (lift up water from bottom) and submersible light (400W). Bottom water was supplied to Larva tank1 and return to copepod tank. Surface water was supplied to Larva tank 2 and drain to outside of the system. Submersible light enhance ...

Regeneration and enhancement of coastal resources with marine ranching in Chile Masatoshi FUTAGAWA / CORDUNAP June 19, 2012 Marine coastal resource is reducing since last few decades due to over fishing of high value shellfish and finfish. Exhaust of those resources broke ecosystem of coastal organisms like un-useful species take over the place of exhausted species and irregular ecosystem reduces productivity and biodiversity then costal resources are shrinking rapidly. We should work for the program which regenerate ecosystem and enhance productivity after recovering ecosystem. Marine ranching program is ideal to regenerate ecosystem and maintain it sustainably which consist seed releasing, artificial reef installation and area management. The program applying in Japan almost half century and some resources were regenerated and enhancing with useful information. I recommend applying the program in Chile which domesticate to local condition. The program is operated by fishe...