| A Transplanting Method of Laminaria japonica Areschoug (Laminariales, Phaeophyta)
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| Woong-Yong Kim, Sung-Je Choi1, Ik Kyo Chung2 and Jong-Ahm Shin*
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Department of Aquaculture, College of Fisheries and Ocean Sciences, Yosu National University, Yosu 550-749,
1Haenam Maritime Affairs and Fisheries Office, Mokpo Regional Maritine Affairs and Fisheries Office, Haenam 536-812 and
2Department of Marine Science, Pusan National University, Busan 609-735, Korea
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| ABSTRACT |
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To obtain basic data, we investigated the effect of blade length on transplants, the transplanting method of Laminaria japonica for creating L. japonica resources and the number of transplanting plates with surviving L. japonica. The survival rate of L. japonica, blade length of transplants and drag force of transplanting plates were also researched. The number of transplanting plates with surviving L. japonica, the survival rate and blade length of 20 cm long-initial transplants were greater than those of 1.5, 5 and 10 cm long-initial transplants in an outdoor aquarium. At the depth of 4 m in the coastal waters, the number of transplanting plates with surviving transplants, the survival rate and the blade length of 30 cm long-initial transplants were higher than those of 10 and 20 cm longinitial transplants. The drag force is calculated by cording up sporophytes of L. japonica into the transplanting plates under water. The drag force in the case of a 2.18 kg-weight transplanting plate and in a current speed of 0.5 m·s-1 for considering stability of the plate was 631.50 g to a concrete substratum on the seabed, 703.92 g to a shingle substratum, 788.00 g to a sand substratum, and 1018.30 g to a silt substratum. If we consider the stability and economic efficiency of the transplanting plate, the proper weight of the plate per one individual of 18.11 cm in blade width and 190.20 cm in total blade length is regarded as 508.2 g when it is calculated with the concrete substratum that shows the lowest drag force.
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| Key words:
drag force, Laminaria japonica, substrata, transplanting plate |
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