米国産アワビの移植と発生および成長について

概要

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Red abalones Haliotis rufescens which in the coastal waters of California were transplanted to Mohne Inlet, Miyagi pref. and the investigations concerning their growth and early development were carried out. The results are summarized as follows. 1. Growth and gonadal maturation of the transplanted red abalone, H. rufescens were vigorous at a water temperature within the range of 14-20°C. The spawning season of this species in Mohne Inlet was during late June and middle July. 2. With temperature stimulation measures the writer succeeded in the induction of spawning artificially. The early development of this species was almost the same as the Japanese abalones except in shell color. Beyond shell lengths of about one centimeter, the young shells grew and metamorphosed into the characteristic form of this species. 3. The growth rate of the youngs of the red abalone was almost the same as that of the Japanese abalone, H. discus hannai. However, in the case of the red abalone, the spawning season was initiated earlier than that of the Japanese abalone. Therefore, considerable good results of rearing may be expected with the introduc-tion of this species.
公益社団法人日本水産学会の論文