Development of marine fin-fish seed production technique.
What happing in Japan?
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I watch Japanese TV program everyday through internet. There are many problems happening, like radiation and refugees. Even so, we stand recovering stage after surviving face.
However, I worry about misunderstanding of non-Japanese due to different culture and language. I will introduce a blog site which inform properly by English as follows.
Reduction of coastal fish resources is common problem in the whole world due to overfishing. Qn the other hand, demand is rising due to health consciousness (less cholesterol), contamination of chicken (influenza), cow (BSE) and pork (HEV). Marine ranching is the one of solution to recovering coastal fish resources which has operated in Japan more than four decades. The result shows that some fishes are recovered, even increased, and contribute benefits. Chile coast water has higher productivity compare to Japan and the method produce more fishes quickly. It may create new business model which has less energy consumption, no contamination and sustainable production, and create employment at rural area. 1. What is Marine ranching 1.1. Idea and activities General ideas of marine ranching are releasing fish juvenile dismissing species int...
Design of Artificial reef in Chile Masatoshi FUTAGAWA / CORDUNAP May 22, 2012 1. Functions of Artificial reefs (AR) Formation of flora and fauna Algae larvae will attach to AR which was carried by current after installation of artificial reef (AR), and the larvae grow with nutrition in water and sunlight. Water current stagnated by AR and grown algae, and sediment attach or settle on AR, the sediment gives more nutrition to algae, and flora is formed around AR. The algae harbor fish larvae and juveniles and feed annelids (worms), arthropods (copepoda, crabs, shrimps), herbivorous and omnivorous fishes. Those animals feed carnivorous fish including pelagic fish that stays above AR then form fauna. Moreover, some of fish and finfish use AR for spawning ground and close life-cycle at AR. High productivity Productivity depends on production of algae which relate to nutrition of water, sunlight, current and design of AR (height, width, thick...
Mussel larvae production for Pacific beakfish larvae ( Oplegnathus insignis ) Masatoshi F UTAGAWA * ¹ Septiembre 17, 2012 *¹ Corporación Privada para el Desarrollo de la Universidad Arturo Prat, CORDUNAP, Iquique, Chile Mussel larva shows 50 m m approximately and swims freely. The size is ideal for primary live feeds for O. insignis larva. Mussel larvae are fed at density 50 larvae/ml with 6 hours interval from Day 3 to 10. Additionally, the larva has advantages of well nutrition and easy production. This method produces 30 million mussel larvae from a female at 30 hours after fertilization. The larvae survive until D2 and eggs settle on larva tank within 6 hours approximately. 1. Mussel gonad shows that male has cream color and female has coffee color. 2. Insert knife below the hinge, cut ligament and open shells. Press male gonad to release sperm and keep in bucket (A) with 10 L of ...
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