抄録
In the previous paper, it was concluded that the quicker the growth of fish, the greater is the mouth size at the beginning of feeding, based on the relationship between total length and size of mouth in 40 kinds of freshwater and marine fishes, However, the characteristics of the upper jaw length in the larval stage of fishes are not well known.
In the present paper, in order to know the specific characteristics mentioned above, upper jaw length of 11 kinds of marine fish larvae, such as Scombridae, Carangidae, Serranidae, Sparidae. Scombresocidae and Engraulidae, were measured and the ratio of upper jaw length to total length were compared.
The results obtained are as follows:
1) A marked inflection on the curve of total length-upper jaw length relationship is mainly found in the larval stage.
2) It was found that the type of the curve and the total length at the inflection point are different among species.
