The oyster farming rafts occupy 200 ha of the water surface in Hiroshima Bay. Each floating raft (ca. 11 m wide × 26 m long) hangs a total of 600 wires (ca. 10 m depth) each attaching 40 oysters' collectors, providing a complex underwater structure. Though the raft structure has been suggested to...

Intermediate culture of artificial seeds of the asari clam, Ruditapes philippinarum, was conducted in bags formed of raschel net with gravel mixed with fragmented scallop shells or pelletized oyster shells as a substrate in the fishing ground of the asari clam in Usu Bay, the east coast of Funka...

The efficacy of using polyethylene net bags containing gravel and pelletized oyster shell powder for natural seed collection of asari clam (Ruditapes philippinarum) was tested at ten study sites along the coast of Gokasho Bay, Mie, Japan. Numerous clams were collected in tidal flats on the left...

This special issue contains ten articles on topics including the significance of the suspended culture of asari clam (Ruditapes philippinarum) and obstacles to increasing its use; the characteristics of mesh bag and artificial turf as a spat collector of natural asari clam in Banzu tidal sand flat...

To investigate the effects of water flow rate and mesh size of the covering net on the survival and growth of asari clam Ruditapes philippinarum in suspended culture, tank rearing experiments were conducted. Clams (3.7-6.4 mm in shell length) were placed in small plastic containers with sand...

This study examined the effects of water current velocity and direction on the growth of the Japanese scallop Patinopecten yessoensis {Mizuhopecten yessoensis in hanging culture. One-year-old scallops were suspended from 4 surfaces of a cubic frame with the exhalent margin (posterior) oriented...

The study was conducted to evaluate the effect of predation of fishes on oyster spat (Crassostrea gigas) suspended under oyster rafts in Hiroshima Bay, Japan. Results revealed that oysters occurred throughout the year, while the blue mussel (Mytilus galloprovincialis) was observed in summer in the...

An economic decision-making tool was designed to help those who are going to start asari clam aquaculture perform cost benefit analysis by simply entering parameters such as farm scale (the number of clams to be produced), materials (raft, containers, substrate, etc.), and labor.

Asari clam, Ruditapes philippinarum, was reared experimentally with two types of longline system (surface and submerged arrays) in a rough sea area (maximum wave height of 2.7 m) in northeastern Harima Nada Sea, off Hyogo Prefecture. The clams were reared in plastic containers (depths of 115 and...