巻号一覧
29 巻, 6 号
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岩井 保1963 年 29 巻 6 号 p. 503-506
発行日: 1963/06/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (889K) -
シイラが餌とした稚魚類について児島 俊平1963 年 29 巻 6 号 p. 507-513
発行日: 1963/06/25
公開日: 2008/02/29
ジャーナル フリーLarge and medium sized dolphin, 50-150cm in fork length, are usually found with juwenile fishes in their stomachs. The major preys are Engraulis japonica, Upenous bensasi, Petroscrites trossulus, Oplegnathus fasciatus, and monoacanthids. In order to compare the fauna of prey species with that in the sea, the author examined the juveniles taken from the surface layer of the sea by two methods, horizontal towing plankton net under control to avoid drifting sea weeds; and dipping up juvenile fishes together with drifting sea weeds. The results are summarized as follows.
1. Juveniles dipped up with sea weeds were fewer in number of species, but more numerous in number of individuals, than juveniles taken by the horizontal towing (Table 2).
2. Juveniles of Engraulis japonica and Upenous bensasi were not collected with drifting sea weeds.
3. Juveniles of Petroscrites trossulus, Oplegnathus fasciatus, and monoacanthids dipped up with sea weeds were larger in size, and more numerous, than those of the same species taken by horizontal towing (Tables 3 and 4). Juveniles of these species preyed by the dolphin resembled, in body length, those of the same species dipped up together with sea weeds.抄録全体を表示PDF形式でダウンロード (212K) -
伊丹 宏三, 井沢 康夫, 前田 三郎, 中井 昊三1963 年 29 巻 6 号 p. 514-520
発行日: 1963/06/25
公開日: 2008/02/29
ジャーナル フリーThe larvae of the Japanese commercial octopod, Octopus (Octopus) vulgare CUVIER, were successfully reared from the swimming larvae just after hatching to the benthic young octopus in 33 to 40 days on a diet of the zoea larvae of the shrimp, Palaemon serrifer. The rearing experiments were carried out at the Hyogo Prefectural Fisheries Experimental Station from June to September, 1962. At a start of experiments 200 individuals of the octopus larvae were kept in a glass vessel containing about 8 litre of sea-water. During the early 20 days period the sea-water of each vessel was aerated and renewed every 3rd or 4th day, and after this period the method was changed for the use of running water. The results obtained are summarized as follows:
1) From just after hatching, the larvae of the octopus were fed on the larvae of Palaemon of 2 to 4mm body-length. (See Table 1) After transforming into benthic stage, they were given a small piece of ovaries, testes and hepatic glands of the crab, Charybdis japonica. Three or four days after transforming, they were fed on small shrimps and young crabs, Gaetice depressus (DE HAAN) of 5 to 7mm carapace-width. It was observed that the young octopus of 30mm total-length ate 4 or 5 young crabs in a day.
2) The survival rate of the octopus larvae was found as low as 9 percent through the free-swimming stage. However, it would be conceivably possible to raise this survival rate much higher if sufficient food supply is secured during the rearing experiments.
3) The growth of the octopus larvae in 90 days after hatching at water temperature 24.7°C (23.0-26.7°C) can be seen in Table 4 and Fig. 1. It was found that the larvae settled on the bottom 33 to 40 days after hatching, when they attained a size ranging 10-15mm in total-length (3.8-5.7mm in body-length). Once the swimming larvae transformed into the benthic young octopus, they became nocternal and fed on foods mainly at night. A considerable mortality occurred among the young octopus, which was caused by cannibalism and creeping out of the rearing water.
4) The numbers of suckers found on each arm were 3 at the hatching, 5 (4-6) at 10 days, 9 (6-12) at 20 days, 19 (16-22) at 30 days, 24 (21-27) at 40 days and 22-23 when a majority of octopus larvae grew to the benthic stage.抄録全体を表示PDF形式でダウンロード (922K) -
市川 龍資, 小栗 幹郎, 高田 直子1963 年 29 巻 6 号 p. 521-524
発行日: 1963/06/25
公開日: 2008/02/29
ジャーナル フリーTantalum-182 uptake by fish both from freshwater and from sea water was investigated by tank rearing experiment using Japanese killifish.
Higher level of tantalum-182 content in fishes was about 50 times of initial concentration in water on fresh weight basis. But, the difference between higher and lower value of its content was amounting to one and two orders of magnitude for freshwater and sea water adapted fish respectively.
Maximum permissible concentration of tantalum-182 in environmental water corresponding to the dose of ICRP recommendation was calculated as 2×10-6μc/ml. for population at large when higher level of concentration factor was used.抄録全体を表示PDF形式でダウンロード (207K) -
竹井 誠1963 年 29 巻 6 号 p. 525-530
発行日: 1963/06/25
公開日: 2008/02/29
ジャーナル フリーA dried fish left in a humid place absorbs moisture and is consequently spoiled.
Theoretically, the relation between the relative humidity ( ?? ) and the saturated amount of moisture absorbed (We) in dried fish is drawn in a sigmoid curve. Inclination of the curve is dependent on such factors as the ratio (c) of dissolved substance in the absorbed moisture to unsolved substance in the moisture, maximum amount of the moisture (Wn), pressure of saturated humidity (F) at a temperature θ, and a factor (a) depending on a type of dried products. Then, the relation may be written as
?? =(c+1)We/c+We+a/FWe/Wn(Wn-We)
Generally speaking, when c, F, or Wn gets the smaller, or when a is the larger, the lower We becomes.
The amount of moisture absorbed in the dried products under different humidities started increasing as the relative humidity increased above the level of 0.70 (Fig. 1). Little or no effect was produced for controlling the moisture absorption by keeping the dried products at a specific temperature, or treating the materials in boiling water or in formaldehyde before drying (Figs. 2 ?? 5).抄録全体を表示PDF形式でダウンロード (301K) -
筋肉エキス中のクレアチンとクレアチニンの分離定量坂口 守彦, 藤田 真夫, 清水 亘1963 年 29 巻 6 号 p. 531-536
発行日: 1963/06/25
公開日: 2008/02/29
ジャーナル フリーIn order to determine creatine and creatinine in tissue extractives, ion exchange procedures prior to colorimetry were found to be applicable. The diacetyl-α-naphthol method for the determination of creatine and the alkali-picrate method for creatinine were re-examined.
From the results obtained, the following way was found to be recommendable for the estimation of creatine and creatinine:
1. Creatine estimation.
(A) After loading the extractives on 0.9×100cm. column of Dowex 50-X8, the column is operated at room temperature with citrate buffer solution (pH 4.25) at flow rate of 6ml. per hour. Each effluent is collected in 1ml. fraction. Creatine is eluted between the 120th and the 138th fraction, and completely separated from other compounds (Fig. 1).
(B) 1.5ml. of distilled water, 0.5ml. of 0.05% diacetyl (Fig. 4) and 2ml. of 2.5% α-naphthol in alkaline solution (Fig. 2) are added to each 1ml. fraction of creatine and adequately shaken. After standing for 20-30min. at 17°C. or 15min. at 22°C. in dark (Fig. 5), the mixture is diluted to 10ml. with distilled water and is measured at 535mμ.
2. Creatinine estimation
(A) After loading the extractives on 0.9×15cm column of Dowex 50-X8, the column is operated at room temperature and flow rate of 6ml. per hour with 20ml. of citrate buffer (pH 5.0) at first, and followed with phosphate buffer (pH 6.8). Each effluent is collected in 1ml. fraction. Creatinine is eluted between the 34th and the 40th fraction, and is completely separated from other compounds (Fig. 6).
(B) 1ml. of 0.5N NaOH (Fig. 7) and 4ml. of 1% picric acid (Table 1) are added to each 1ml. fraction of creatinine and adequately shaken. After standing for 25min. at 18°C. (Fig. 7), the mixture is diluted to 20ml. with distilled water and is measured at 535mμ.
3. Recoveries of creatine and creatinine added to the tissue extractives by the present methods were 99.0-102.4% (Table 2).抄録全体を表示PDF形式でダウンロード (307K) -
加熱による魚肉アクトミオシンの粘度変化について上田 侃男, 清水 亘, 志水 寛1963 年 29 巻 6 号 p. 537-541
発行日: 1963/06/25
公開日: 2008/02/29
ジャーナル フリーChange in the intrinsic viscosity of purified fish actomyosin caused by heating at various temperatures was dealt with. Shimizu, Hosokawa and Simidu, who investigated the apparent viscosity of a concentrated fish muscle protein extract, found a remarkable increase in the viscosity at temperature range between 30°C.-40°C. and ascribed it to unfolding of the actomyosin molecule. In the present paper, it was become clear from following results that this phenomenon is not due to the change in the configuration of the protein molecule itself, but to the alternation in the interaction of the unfolded molecules.
When dilute solution of fish actomyosin was heated, the intrinsic viscosity always decreased even at temperatures between 30°C. and 40°C. at which the increase of the apparent viscosity was observed with the concentrated muscle extract. (Fig. 1)
The rate of the decrease was dependent on both the heating temperature and period. Continuing the heating for a long time, a considerable decrease was detectable even at temperatures lower than 30°C. (Fig. 3)
The change in the intrinsic viscotity caused by heating was found to be reversible to a certain extent by cooling (Fig. 2).抄録全体を表示PDF形式でダウンロード (316K) -
各種魚類の粘性物質に含まれる多糖類の糖組成その2塩基性糖および酸性糖区分の糖組成榎本 則行, 長竹 浩子, 富安 行雄1963 年 29 巻 6 号 p. 542-545
発行日: 1963/06/25
公開日: 2008/02/29
ジャーナル フリーIn the previous report1) the neutral sugars of mucus-polysaccharides from fishes were investigated. In the present work the basic and acidic sugar-fractions from 6 species of fishes were analyzed quantitatively. The components of basic sugars were found to be galactosamine and glucosamine (Fig. 1). The content of galactosamine was nearly equal to or higher than glucosamine except ray, Raja hollandi, in which glucosamine was higher in amount than galactosamine. In eel galactosamine was present 10 fold the quantity as much glucosamine (Table 1).
Acidic sugar was found to be a minute quantity in all the species tested as compared with neutral and basic sugar. Judging from the absorption curve of the reaction product of the acidic fraction with DISCHE'S reagent (Fig. 2) and the previous results9), it was reasonably concluded that the principal component of the acidic fraction was glucuronic acid.抄録全体を表示PDF形式でダウンロード (223K) -
真道 重明1963 年 29 巻 6 号 p. 550-557
発行日: 1963/06/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (727K) -
木部 崎修1963 年 29 巻 6 号 p. 562-567
発行日: 1963/06/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (542K) -
辻田 時美1963 年 29 巻 6 号 p. 580-601
発行日: 1963/06/25
公開日: 2008/02/29
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神田 献二1963 年 29 巻 6 号 p. 604-618
発行日: 1963/06/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (1115K) -
1963 年 29 巻 6 号 p. 653
発行日: 1963年
公開日: 2008/04/22
ジャーナル フリーPDF形式でダウンロード (29K)
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