同一漁場に育った宮城産ワカメと鳴門産ワカメの形態の比較

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In Undaria pinnatifida of Japan, three local forms have been hitherto reported; f. typica, f. distans and f. narutensis. To find out whether the differences among them are hereditary ones or conditional ones, gametophytes of f. distans from Miyagi Prefecture and f. narutensis from Tokushima Prefecture were transplanted to a same culture ground in Tokushima Prefecture (see Fig. 1) and the sporophytes developed from them were morphologically studied. The results were as follows: 1) In full-grown stage, stipes of Miyagi-plants become longer than that of Tokushimaplants, though in younger stage the relation has been found reverse. It may be assumed that stipes of Miyagi-plants have the property that they grow stronger than that of Tokushimaplants. 2) In younger stage, Miyagi-plants have leaves of long oval shape and Tokushima-plants long elliptic leaves (see Plate). A linear relation is found between the length and the width of leaves in each group. 3) In Miyagi-plants comb-teeth leaflets and sporophylls appear in an earlier stage than in Tokushima-plants. 4) The relation between the length (LI) and the weight (W2) of fronds may be shown in a curve in each group. The ratio, weight/length in Miyagi-plants is found smaller than that in Tokushima-plants. From these significant morphological disagreements between these two transplanted groups cultured in a same circumstance, it will be concluded that the difference between two local forms in question is due to a hereditary character and not a conditional one.
公益社団法人日本水産学会の論文

同一漁場に育った宮城産ワカメと鳴門産ワカメの形態の比較

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