New system for egg management and collection of newly hatched larvae in laboratory-reared giant cuttlefish Sepia latimanus
2006
Oka, M.(National Center for Stock Enhancement, Saiki, Oita (Japan). Kamiura Station) | Tezuka, N.
A new system for egg management and collection of newly hatched larvae of the giant cuttlefish Sepia latimanus was developed in order to accommodate a large number of eggs which were collected from broodstock under captive conditions. The new system consists of containers (708 x 460 x 83 mm) made from polyethylene, FRP tanks (4,280 x 1,750 x 1,010 mm, water volume: 5 m3) and a device for the automatic collection of newly hatched larvae. The new container type can accommodate three times as many eggs as the existing Atokins type container (310 x 310 x 60 mm). Total capacity of the FRP tank for egg accommodation was about 22,000 eggs, being 11-fold that of the Atokins type tank (420 x 2220 x 400 mm). It was clarified that we could manage 60,000 eggs per year using the new system three consecutive times. In addition, the new system saved on occupied tank areas and cut back on tasks such as egg transportation from Atokins type tanks to hatching tanks as well as the collection of hatched larvae using dip nets.
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