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Relationship between spawning behavior of spear squids (Loligo bleekeri) and structures of the port

Creator:

Kitahara, Shigeshi, Oka, Sadayuki, Honma, Akihiro, Yano, Kenji, Narumi, Hideto, and Koganezaki, Kiyoto

Abstract:

In early spring, spear squids (Loligo bleekeri) lay their egg capsules on top of hollows in reefs and cavities in structures of Hokkaido ports on the Sea of Japan. Therefore, the role of port structures is important for propagation of spear squid. Research on the spawning conditions of spear squids...

Resource Type:

Research Paper

Full Text:

Japan Proceedings RELATIONSHIP BETWEEN SPAWNING BEHAVIOR OF SPEAR SQUIDS (LOLIGO BLEEKERI) AND
Three-year Closure of Sailfin sandfish, Arctoscopus japonicus Fisheries and Resources Management in Akita Prefecture, Japan

Creator:

Sugiyama, Hideki and Sakuramoto, Kazumi

Abstract:

The sandfish catch in the coastal waters off Akita Prefecture has fluctuated largely over the last 40 years. It began to decrease in the middle 1970s, and in 1991 it heavily depleted by 70 tons, which corresponds to less than 1% of the catch in the 1960s. The Fisheries Cooperative...

Resource Type:

Research Paper

Full Text:

spawning grounds, and releasing juveniles, artificially hatched and grown. Then, the catch recovered by