巻号一覧
30 巻, 8 号
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生田 国雄1964 年 30 巻 8 号 p. 601-609
発行日: 1964年
公開日: 2008/02/29
ジャーナル フリーSince the end of 1961, mullets, eels and crucian carps had died in the area polluted with the waste of phenol-formaldehyde resin works in Hori River, Nobeoka City, Miyazaki Prefecture. Near the outlet, the wastes of rayon works and carbon disulfide works are also ejected. The wastes of the latter two are treated by aeration, neutralization and sedimentation, while the waste of the phenol-formaldehyde resin works have never been treated. Therefore, it was surmised that the death of the fishes was due to the waste of the resin works. Then, the author investigated the water quality of the polluted area in Hori River, determining especially concentration of phenol in the water. The term on which the present investigation was car-ried out, particularly from March to May, was the season of up-stream migration of Ayu, Plecoglossus altivelis. At neighboring area of the outlet, the death of Ayu occurred frequently. Examining the results obtained, it seemed also that the death of Ayu and the other fishes at the lower reaches of Hori River was ascribable to the toxic effect of phenol and formalin within the waste from resin works. It is also found that the massive death of Ayu migrating up-streamly is more or less related to the tide. The stream of the river polluted with the wastes flows more gently at flood time than at ebb time, and stagnate at the high water, and it leads to the death of the fish.
Then, using carps as materials, TLm determination was carried out in the laboratory. The lethal concentrations (TLm-48 hrs.) were presented as follows:
phenol 25-27 ppm; formalin 0.063-0.066‰ mixture of the two 0.93 ppm (ph.)
+0.1023‰ (f.)-1.02 ppm (ph.)+0.1122‰ (f.).
The principal cause of the death of Ayu might be sought in paralysis of nervous system caused by nervous toxicity of phenol and formaldehyde.抄録全体を表示PDF形式でダウンロード (516K) -
1938～'48年のマイワシの系統群にいて安田 秀明1964 年 30 巻 8 号 p. 610-612
発行日: 1964年
公開日: 2008/02/29
ジャーナル フリーEstimating the percentage of the freqeuncy of appearance of scale rings each having par-ticular enclosures, the percentage was plotted against the so-called back calculated body-length, i.e., the body length of fish assessed for the time of scale ring, so that a curve which is herein referred to as “life record curve ”.
Adult individuals of sardine group caught in coastal waters of Japan in 1938 ?? '48 (Table 1) were judged to be composed of four stocks (K. L. A and C) mutually different in grano-graphical peculiarity (Fig. 1).抄録全体を表示PDF形式でダウンロード (149K) -
田北 徹, 藤田 矢郎1964 年 30 巻 8 号 p. 613-618
発行日: 1964年
公開日: 2008/02/29
ジャーナル フリーPleuronichthys cornutus (TEMMINCK et SCHLEGEL), the small turbot, is commonly distributed along the coast of Southern Japan and caught with much commercial importance. On December 6, 1963, the authors carried out the artificial insemination of this fish at Shimabara City, Kyushu, and observed the egg development and hatched larvae. The spawning season seems to extend from the middle of November to the end of December in Ariake Sound which the City faces.
The egg is bouyant, colorless and spherical in shape, measuring 1.03-1.11mm in diameter. The egg has many small oil globules in early developmental stages, but the globules unite in from one to some large ones in gastrula stage. The egg-membrane has a hexagonal pattern of approximately equal size, measuring about 0.018mm across.
The hatching took place in 115 hours at the water-temperature about 14.0°C. In the course of development, the embryonal body bears thickly melanophores and xanthophores. The newly hatched larva, measuring about 2.80mm in total length, had 12 ?? 13+24=36 ?? 37 myomeres (the vertebra-number 36-38). The anus opens at about the mid point of the body. The almost whole body is scattered with melanophores and xanthophores except the posterior part of the tail, where these chromatophores appear along the dorsal and ventral margins. The chromatophores appear thinly on the yolk sac.
The 13 hours old larva is 3.69mm in total length, and its eyes are becoming black. The mouth opened at about 35 hours after the hatching. By 60 hours after the hatching the yolk was almost absorbed and the pectral fins appeared. The chromatophores of the head and the mid part of the body expand to the dorsal and ventral fin folds.
Comparing this larva with the ones of Californian turbots of the same genus the following similar characters were found.
1) The anus opens almost mid part of the body.
2) The chromatophores of the body are very thick, not forming cross band, and some ones expand to the fin fold.抄録全体を表示PDF形式でダウンロード (1145K) -
漬木つきシイラの摂餌状態について児島 俊平1964 年 30 巻 8 号 p. 619-623
発行日: 1964年
公開日: 2008/02/29
ジャーナル フリーTo investigate the relationship between the amount of stomach contents and the behaviour in the dolphins living near the bamboo rafts, the stomachs contents the fishs were examined quantitatively.
The frequency of occurrence of empty stomachs amounted to the considerable propertin, but on the other hand, a number of dolphins were found at the state of satiation. Indivials with empty stomach were found mainly among small sized fishes, and scarecely among larger ones.
The amount of stomach contents of dolphins decreased during the periods of alternation of dominant species among medium sized prey fishes, and were very little while juveniles of fishes dominated as prey. The amount of stomach contents of dolphins has a tendency to vary in proportion to the occurrence of medium sized prey fish.
The amount of stomach contents during the periods of good catch were in large quantities comparing with those in poor catch.
It is suggested that dolphins appear to gather in shelter under bamboo rafts regardness of the state of stomachs, satiated or empty.抄録全体を表示PDF形式でダウンロード (310K) -
大陸棚外縁附近における分布前田 弘1964 年 30 巻 8 号 p. 624-629
発行日: 1964年
公開日: 2008/02/29
ジャーナル フリー1. As the supplement of the description of the bathymetric distribution of respective species of groundfishes illustrated in the second report of this series, the distribution of groundfishes near the outer edge of the continental shelf is shown in this report.
2. The peculiarity of the present example is being hauled up from both of the terminals of the row by two boats of different size and manualing response. This makes the analyses very complicated.
3. After √x+0.5 transformation of the catch by skate, it is indicated that the abrupt increase in the density of the hooked individuals of most of the species hooked by the skates in the first quarter or half of the part hauled up by the mother-ship makes the present example not to be regarded as homogeneous with respect to the catch. This is thought to suggest the accumulation of the shallow water species in front of the cliff hanging over the continental slope.
4. The exclusion of these parts makes the present example capable of being regarded as homogeneous and employable to the present purpose.
5. In this way, it is found out that all the species other than true cod are hooked by chance along a row of gears settled on the bottom of 155m deep, although arrow toothed halibut, ray or true cod is caught abundantly whereas halibut or Alaska pollack less abundantly.抄録全体を表示PDF形式でダウンロード (383K) -
野中 順三九, 小泉 千秋1964 年 30 巻 8 号 p. 630-634
発行日: 1964年
公開日: 2008/02/29
ジャーナル フリーEuphausia superba, got from the stomach of antarctic finback whale, was submitted to freez-drying and thoroughly extracted first with ether and then five times with boiling 95% alcohol. Each fraction thus obtained was further fractionated into acetone soluble and insoluble fractions respectively as shown in Fig. 1, their yields and properties being shown in Table 1. Fatty acid constituents were assayed as methyl ester and unsaponifiable as acetyl-derivative.
Experimental conditions and results obtained are shown in Table 2, and Figs. 2, 3, 4, 5, 6 and 7.
The results indicate that Euphausia superba contains on dry basis 19.4% lipid of which 5.53% is unsaponifiable matter. This lipid contains, besides C14 and C16 saturated alcohols and C18 and C20 unsaturated acohols, relatively high amounts of CF120, CF5 or 020, CF122, CF323, and CF622 fatty acids which have not ever been reported.抄録全体を表示PDF形式でダウンロード (267K) -
かまぼこの生産地による動的粘弾性の比較平田 貞夫1964 年 30 巻 8 号 p. 635-638
発行日: 1964年
公開日: 2008/02/29
ジャーナル フリーDynamic rigidities, G'(ω), dynamic viscosities, η'(ω), relaxation spectra, H(log τ) and loss tangent, tan õ, of three different foodstuffs, i.e. processed cheese, commercial Kamaboko prepared in Odawara and in Maizuru were calculated from the data of the periods and the damping coefficients measured by means of damped free vibration in torsion. These functions were plotted logarithmically against angular frequencies or relaxation times for the purpose of comparing the viscoelastic properties of these foodstuffs. The magnitude of each function for processed cheese was the largest of all samples. On the other hand, the magnitudes of these parameters for Kamaboko made in Odawara were smaller than those for Kamaboko prepared in Maizuru. Furthermore, the difference between each magnitude of η'(ω) was much larger than that of G'(ω) for both samples. A new parameter, γ, which represents the ratio of η'(ω) and G'(ω) under a constant an-gular frequency seems to be a useful measure in characterizing the rheological properties of various foodstuffs and the commercial qualities of the same kind of foodstuffs for industrial purpose.抄録全体を表示PDF形式でダウンロード (215K) -
天野 慶之, 山田 金次郎1964 年 30 巻 8 号 p. 639-645
発行日: 1964年
公開日: 2008/02/29
ジャーナル フリーA fact, that pyloric caeca of cod is capable to convert TMO into FA and DMA under normal condition, has been presented. This transformation of FA or DMA may be carried out by specific enzyme present in the pyloric caeca.
A possible occurrence of the precursor to generate TMA other than TMO and of the precursor to form TMO in the pyloric caeca was also suggested.抄録全体を表示PDF形式でダウンロード (345K) -
鹿山 光1964 年 30 巻 8 号 p. 647-659
発行日: 1964年
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (896K) -
座間 宏一1964 年 30 巻 8 号 p. 660-672
発行日: 1964年
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (871K) -
山田 実1964 年 30 巻 8 号 p. 673-681
発行日: 1964年
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (505K) -
金田 尚志1964 年 30 巻 8 号 p. 682-689
発行日: 1964年
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (513K)
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