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Volume 1, Issue 3
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Kiyomatsu MATSUBARA, Akira OCHIAI1950 Volume 1 Issue 3 Pages 145-156
Published: December 30, 1950
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe fishes of the family Hoplichthyidae were in a general state of confusion until Jordan and Thompson revised them in 1913. During the course of our study of the Japanese deep-sea fishes, however, some additional facts have been found that require us to present our different analysis.
In order to clarify the status and relationship more satisfactorily comparative studies have been undertaken from a viewpoint of the biometry and anatomy. In the biometric study we applied four methods as shown in chapter 2. In the anatomical study all the skeletons and alimentary canal have been examined. The results are shown in chapter 3 and 4.
Based upon our biometric and anatomical studies we considered the relationships of all the hitherto known species referable to the family Hoplichthyidae. The results are shown in chapter 5.
In the present study we examined four species, Hoplichthys langsdorfii Cuvier and Valenciennes, H. gilberti Jordan and Richardson, H. filamentosus, n. sp.and H. fasciatus Matsubara from the Japane and its adjacent waters, which are called herein L. G, Fi and Fa respectively. Unfortunately no specimens of H. regani Jordan and Richardson have come under our examination.View full abstractDownload PDF (2060K) -
Toshijiro KAWAMURA, Sotoji OTSUKA1950 Volume 1 Issue 3 Pages 157-165
Published: December 30, 1950
Released on J-STAGE: July 04, 2011
JOURNAL FREE ACCESS1. Development of the ovaries of immature gold-fishes and red crucians, about 10 months of age, was accelerated by administration of gonadotropin (manufactured by Teikoku-zôkiyaku Kenkyusho) as well as frog or cattle anterior-pituitary suspensions. Some of the treated fishes spawned by mating with males after the administration.
2. The ovulation was accelerated by injection of several kinds of gonadotropic substances into female gold-fishes with full-grown ovaries. By mating, spawning occurred 1-3 days after injection of more than 4 frog or fowl pituitary glands, 100 mg. of dried cattle anterior pituitary glands or 150 RU of gonadotropin. When the injected females were not mated, the ovulation was weaker than that in the mated females, though their ovaries were affected and ovulated some completely or partly ripened eggs by injection of nearly the same amount of the gonadotropic substances.
3. The proportion of hatched larvae to artificially fertilized eggs was nearly the same between the ovulation under natural conditions and the artificial one which was accelerated with gonadotropic substances. It was about 80% in most cases.
4. While the breeding season of the gold-fish is April to July, one female reared at high temperature and under prolonged illumination laid eggs on March 3. Another female which had been injected with gonadotropic substances for a long time ovulated ripe eggs on September 13.View full abstractDownload PDF (1149K) -
V. On the growth of tobi-koi (superior growing carp's group)Isao MATSUI1950 Volume 1 Issue 3 Pages 166-174
Published: December 30, 1950
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe 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.View full abstractDownload PDF (3471K) -
Hisao KOBAYASI1950 Volume 1 Issue 3 Pages 175-181
Published: December 30, 1950
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSI propose that the terms “radii” and “circuli” which have hitherto been most commonly used to designate the sculpture of fish scales should be replaced by the terms “grooves” and “ridges” respectively, which I should think are more proper.View full abstractDownload PDF (1293K) -
Kojiro TANAKA1950 Volume 1 Issue 3 Pages 182-186
Published: December 30, 1950
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThis is a study on how the body-color of Japanese porgies (Pagrosmus major T. & S.) is affected by baits that are given to them, the major points of which are as follows:
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 (Ammodytes personatus), red-shrimp (Penacopsis akayebi), and oyster (Ostres gigas) 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.View full abstractDownload PDF (801K) -
Kiyomatsu MATSUBARA1950 Volume 1 Issue 3 Pages 187-197
Published: December 30, 1950
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSIn his elaborate work, Schultz (1938) has referred 7 species under the genus Polyipnus. Of these, 3 ones, P. spinosus Günther, P. asteroides Schultz and P. nuttingi Gilbert, are known to occur in the Japanese waters.
Lately the writer examined 26 specimens which are referable to the present genus, taken from Kumano-Nada by deep-sea trawler and ascertained that they are represented by two distinct species, Polyipnus spinosus and P. asteroi-des.
Upon careful examination of these specimens the writer has found the various important differences between them and pointed out the misidentifi-cations made by some Japanese ichthyologists.
The differences of these two species may be understood in the following comparison (See also Figs. 2 to 6).View full abstractDownload PDF (1256K) -
With some additions to the previous reports of the present seriesTokiharu ABE1950 Volume 1 Issue 3 Pages 198-206_1
Published: December 30, 1950
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (1157K) -
Kiyomatsu MATSUBARA1950 Volume 1 Issue 3 Pages 207
Published: December 30, 1950
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (115K)
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