Observation of the influence of food upon the body-color of Pagrosomus major T. & S.
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概要
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This is a study on how the body-color of Japanese porgies (<I>Pagrosmus major</I> T. & S.) is affected by baits that are given to them, the major points of which are as follows:<BR>After the writer had put some porgies in pisciculture ponds covered with sunshades and had turned their body-color to black, he fed them with sand-lance (<I>Ammodytes personatus</I>), red-shrimp (<I>Penacopsis akayebi</I>), and oyster (<I>Ostres gigas</I>) for 40 to 101 days. As a result, it was observed that the group which was given red-shrimps as baits was the only ones that resumed their natural color of red after the porgies had their body-color once changed to black. It seems probable that the red pigments of the red-shrimps have some close connection with this phenomenon. However, I think it is a very interaesting fact.
- 日本魚類学会の論文
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