Studies on the growth of the pond-cultured animals:V. On the growth of tobi-koi (superior growing carp's group)

概要

論文の詳細を見る
The growth-rate of tobi-koi (compared with common carp) is superior, and the present paper reports on its growth-rate. The results may be summarized as follows. 1. Relation between the scales size (In) and the body length (L) is able to be expressed by the following formura. L = 15.778 + 0.029 ln 2. The number of apical radii (R1) and basal radii (R2) in scales, increases according to growth, and computing the date between these numbers and the body length is able to be expressed by the following formulae. And R1 is more than R2 in the number. (See Table 2) R1 = 1.006L1.0738 R2 = 1.0350L0.8927 3. The body length of Tobi-Koi showed minimum 5.9cm, maximum 15.5cm, average 9.06±0.31cm in a year, minimum 19.66cm, maxinum 33.0cm, average 25.77±0.26cm in two years, minimum 34.6cm, maximum 45.4cm, average 40.04±0.66cm in three years (See Table 5) 4. The growth of male is superior to female during a year, but in two years female is a little superior to male and in three years, female is more superior to male. This irregular phenomenon is probably attributable to development of gonad. (See Table 6) 5. The Tobi-Koi's growth-rate is superior 5% in a year, 3% in two years, about 5% in three years to the common carps, growth.
日本魚類学会の論文