カサゴの血液学的研究-V : 血液要素・血清蛋白泳動像ならびに分画値の季節的変化

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From the results of preliminary experiments made during the preceding five years, using 177 specimens of rockfish, Sebastiscus marmoratus, it became evident that a few individual fish are enough for the analysis of the seasonal change of the blood elements of this species (Table 1, Fig. 1). Three rockfish were, therefore, kept in a concrete tank (0.7m3) of circulating sea water during the period of one year. The blood was drawn six times from each individual to compare the seasonal change of the blood elements (Table 2). Sampling of the blood, measurements of the specific gravity, serum protein and haematocrit, and electrophoresis were done following the same techniques used in the previous studies. In both male and female, the specific gravity of the blood, the amount of serum protein and haematocrit value were most high during October and November, the period when spermatozoa are discharged in the male. The lowest values were found in February, when the female of this species is usually liberating viviparous larvae (Fig. 2). Five fractions were observed in the electrophoretic pattern of serum protein. These components were separated clearly throughout the year in the female, while sometimes they were not separated distinctly in the male (Fig. 3). The percentage of serum protein fractions varied with the season. Component I showed the minimum and Component In the maximum during the period discharging spermatozoa, in both the male and the female (Fig. 4). It is of interest to note that the change in the amount of blood elements as well as its seasonal percentage occurrence seemed to coincide fairly well with some physiological characteristics, i.e. the development of sexual glands, of the rockfish.
公益社団法人日本水産学会の論文

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山下秀夫
西海区水産研究所

カサゴの血液学的研究-V : 血液要素・血清蛋白泳動像ならびに分画値の季節的変化

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