鱗の脱落再生の原因に関する一考察特にレンコダイTaius tumifronsについて
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概要
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Observing the ratio of regenerated scales to the total ones (the apparent regeneration ratio of scales), and the estimated age when the scale had been regenerated, the writer was able to make clear the following facts. The samples dealt with in the present paper were about 263 yellow sea bream caught in the East China Sea, during the term from November 1951 to October 1952. 1. The median value of the apparent regeneraton ratios of scales of each age class increases by about 6 percent per age. The maximum value observed is 76.5 percent, while the minimum one is 0.8 percent. (Table 1, Fig. 2). 2. Polya-Eggenberger type distribution is approximately applied to the frequency distribution of the apparent regeneration ratio of scales in each estimated age stage. No significant difference is observed in this ratio between the north and south areas, sexes, and among ages of samples, regarding 2 and 3 age stages. 3. The ratio of number of samples carrying no regenerated scale to the total number of those shows a relatively high value of 6.8 percent at 0 and 1 age stage, but is less than 3 percent at 2 aged one and older. (Table 2). 4. The average regeneration ratio of scales is 4.5 percent at 0 and 1 age stage, 4.9 percent at 2 aged one and more than 6 percent at 3 aged one and older. (Table 3). 5. Synthesizing above mentioned facts and other ecological and morphological knowledge on the present fish, it will be concluded that the scales of this species fall off more frequently by some physiological causes rather than the mechanical ones.
- 公益社団法人 日本水産学会の論文
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