巻号一覧
32 巻, 8 号
選択された号の論文の11件中1～11を表示しています
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マアジの餌料選択性,ならびに魚群の餌付きにおよぼすソーメン投餌の影響岡林 正十郎1966 年 32 巻 8 号 p. 623-629
発行日: 1966/08/25
公開日: 2008/02/29
ジャーナル フリーIn order to investigate the fooding habit of jack mackerel, Trachurus trachurus (Linné), the fish were confined in floating fish preserves for a month, during which anchovy larvae, skipjack muscle and vermicelli were given as food. The results of the feeding are as follows.
1) Anchovy larvae and skipjack muscle were eaten very well, while the fish did not take vermicelli, either boiled or unboiled, when it was given singly. However, boiled vermicelli mixed with anchovy larvae or skipjack muscle was eaten by about half of the fish which showed feeding (Table 2 and 3).
2) Even after vermicelli had been given intermittently, the fish took the other foods well. Therefore, it does not seem likely that vermicelli has an unfavorable effect on feeding of the fish.抄録全体を表示PDF形式でダウンロード (223K) -
野中 忠1966 年 32 巻 8 号 p. 630-638
発行日: 1966/08/25
公開日: 2008/02/29
ジャーナル フリーDuring the daytime, Japanese spiny lobsters hide themselves in fissures and crevices of the rocky bottom, and shores with more of such shelters are better fishing grounds for the lobsters. At a good shelter, a “mizuki**” fisherman catches lobsters many times during the same season. In order to investigate the habit of shelter selection by the lobster, experiments were conducted, using a reserve pond and an aquarium. The experimental results are as follows.
(1) Although the reserve pond and the aquarium had no suitable shelter, the lobsters in them were distributed in the daytime not at random but with preference depending upon the place. When several rocks were piled on the bottom for a shelter, many individuals gathered there.
(2) The number of lobsters gathering in the artificial shelter of rocks was determined by its shape and construction, and by the total number of lobsters present in the aquarium.
(3) When the size and construction of the shelter and the total number of lobsters were kept unaltered, the number of individuals gathering in the shelter became constant in a few days after the beginning of experiment, the rest of the animals getting settled at the most preferable parts of the aquarium. If some individuals were removed from the shelter under this condition, the decrement was filled up by recruitment from other places, and the previous number at the shelter was recovered within a few days.
(4) When a shelter was constructed with several oblong rocks piled in such a way that holes of 10×l5×30cm were made among the rocks, the following relation was obtained between the total number of lobsters in the aquarium (x) and the number gathering in the shelter (y). y=a(x-A)b+A where, A, b and a are constants representing a limit within which all individuals gather in the shelter, a coefficient determined by the shape of the holes, and that determined both by b and the number of holes, respectively.抄録全体を表示PDF形式でダウンロード (531K) -
人工流れ藻による実験千田 哲資1966 年 32 巻 8 号 p. 639-642
発行日: 1966/08/25
公開日: 2008/02/29
ジャーナル フリーThe significance of drifting seaweeds for juvenile fishes was studied through experiments with artificial drifting seaweeds.
Aggregations of juvenile fishes were formed under artificial drifting seaweeds in the course of a few hours, both during day time and at night. The juvenile fishes are probably not attracted towards drifting seaweeds by food nor by odor of seaweeds.
Fishes once gathered under a mass of drifting seaweeds do not invariably stay there, but the transfer of fishes from one to another mass of seaweeds must take place time and again.
Factors other than the reduction of light intensities may also cause the gathering of young fishes under drifting seaweeds.抄録全体を表示PDF形式でダウンロード (347K) -
照度の影響についての実験千田 哲資1966 年 32 巻 8 号 p. 643-646
発行日: 1966/08/25
公開日: 2008/02/29
ジャーナル フリーRegarding the gathering behavior of juvenile fishes under drifting seaweeds, the effect of reduction in light intensity was studied through experiments with a variable light aquarium (Fig. 1).
Most of the juvenile fishes used in the experiments gathered in the light part of the aquarium rather than in the dark part. None of the fish species tested gathered positively in the dark part.
Sensitivities to changes in light intensity vary specifically, and Rudarius encodes are extremely sensitive (Table 2). It seems that those fishes living in a closer spatial relation with drifting seaweeds are less sensitive.
Factors other than the reduction in light intensity must play more important roles in causing the gathering of juvenile fishes under drifting seaweeds. Further studies into the factors are necessary.抄録全体を表示PDF形式でダウンロード (391K) -
浮漂物に伴うシイラ魚群について児島 俊平1966 年 32 巻 8 号 p. 647-651
発行日: 1966/08/25
公開日: 2008/02/29
ジャーナル フリーIt is not rarely the case that fishing boats of Shiirazuke fishery catch dolphins taking advantage of natural flotages in the sea other than their original “Tsukegi” (a bamboo raft set afloat to attract dolphins). In this paper the author intended to report how fishing boats are utilizing flotages and how is the fishing condition of dolphins there.
1) Flotages utilized by Shiirazuke fishing boats off Shimane Prefecture are composed of following three kinds, that is, a) drifting “Tsukegi” (50% of total flotages utilized): They had been set in more western sea areas but were drifted into the fishing ground off Shimane Prefecture as their anchor lines were broken by some causes. b) drifting sea-weeds (40%), c) drifting timber (10%).
They are utilized mainly from early summer to midsummer (Table 1).
2) Although flotages are distributed abundantly in the coastal region, those which are utilized by fishing boats are flotages drifting in the sea areas more than 10 miles offshore. There is an indication that more dolphins tend to accompany a single flotage in the offshore area close to the center of the warm Tsushima current than the coastal area (Fig. 1).
3) No direct relation between the number of dolphines under a flotage and the kind or size of the flotage is recognizable (Figs. 2, 3).
4) Dolphins gather around drifting dead bodies of large animals likewise as other flotages (Table 2).抄録全体を表示PDF形式でダウンロード (254K) -
漬木に伴う魚群より見たシイラの群遊性について児島 俊平1966 年 32 巻 8 号 p. 652-654
発行日: 1966/08/25
公開日: 2008/02/29
ジャーナル フリーThe size of a dolphins school accompanying a single “Tsukegi” was examined using the data of Shiirazuke fishery off Shimane Prefecture during the fishing season (June through October) in 1964. The catch data from 2, 447 operations were analysed and the following results were obtained;
1) The numbers of dolphins per single operation of the dolphin purse seine using “Tsukegi” ranged from one to 590 (Table 1). The range, however, varied from year to year.
2) As the fishing season went on, aged dolphins decreased in number and replaced by young fish and later in the season the latter be came the main constituent of the catch. At the same time, the number per single “Tsukegi” increased (Fig. 1 and Table 1).
3) The seasonal variation in the size of a dolphin school accompanying single “Tsukegi” may be caused by the ecological differences between the spawning schools (aged fish) and the feeding schools (young fish).
4) It is considered that a migrating school of dolphins is made up of one to 3 individuals for large sized fish, 4 to 10 for medium sized fish and several tens to several hundreds for small sized fish.抄録全体を表示PDF形式でダウンロード (197K) -
食品中の2-(2-furyl)-3-(5-nitro-2-furyl) acryl amide (フリルフラマイド)の化学的定量法荒井 伸一郎, 松田 敏生1966 年 32 巻 8 号 p. 655-661
発行日: 1966/08/25
公開日: 2008/02/29
ジャーナル フリーA chemical procedure for the determination of Furylfuramide (FF) in foods is detailed in this report. The procedure can be summarised as follows:
(1) The sample is homogenized in a 5% meta-phosphoric acid solution.
(2) FF is extracted from the homogenate using a toluene-butyl acetate mixture (1:1).
(3) FF is isolated using an alumina column and eluted from the column by using metha-nol.
(4) After the methanol is distilled off in vacuo, FF is dissolved in a pH 6.0 phosphate buffer solution and the reduction wave height is measured using polarography.
(5) The lowest limit of determinable quantity of FF in food is about 1.0ppm.抄録全体を表示PDF形式でダウンロード (399K) -
検液調製方法の検討篠山 茂行, 鈴木 郁子1966 年 32 巻 8 号 p. 662-667
発行日: 1966/08/25
公開日: 2008/02/29
ジャーナル フリーAs part of the determination method of furylfuramide (FF) in fish products, the prepara-tion of the test solution for a microbioassay of FF which has been added to ground fish meat or fish sausage was studied, and following results were obtained.
The removal of water-soluble components from fish flesh shows no discernible effect of interference on the recovery of FF (Table 1). When the ground meat of whale is stored at 3±1°C, the amount of FF decreased to one-tenth of the initial amount after 96 hours (Table 2). The decrease of FF is also recognized in the case of storage test of homogenated meat (Table 3), however, the recovery of FF seems to differ with different proportion of fish meat and water (Tables 4 and 5). In the preparation of supernatant to be tested from homogenate, the speed of centrifugation affects on the amount of FF in supernatant (Table 6).
On the basis of the results presented above, the following method of preparation of test solution was recommended:
To one part of sample such as fish sausage, is added three parts of DMF buffer solution, and the mixture blended for 1 minute by homogenizer. The homogenate obtained is centri-fuged at 6000 r.p.m. for 15 minutes, and the supernatant is subjected to the determination of FF.抄録全体を表示PDF形式でダウンロード (411K) -
森 幹男, 斎藤 俊夫, 中西 愛乃1966 年 32 巻 8 号 p. 668-672
発行日: 1966/08/25
公開日: 2008/02/29
ジャーナル フリーAn African fish, Allocyttus verrucosus, was found to contain the body oil primarily consisting of wax in place of glyceride. The acetone-soluble oil of the flesh was fractionated into the hydrocarbon, wax, glyceride and polar substance fractions by column and thin-layer chromatography, and alcohol and fatty acid constituents of wax and glyceride fractions were analyzed by gas-liquid chromatography. A diversity of alcohols and fatty acids was remarkable and a very close similarity observed between the fatty acid composition of the wax fraction and that of the glyceride fraction. The main constituents present were eicosenol and docosenol in wax, and oleic and eicosenoic acids both in wax and glyceride.抄録全体を表示PDF形式でダウンロード (362K) -
安元 健, 田中 光雄, 橋本 芳郎1966 年 32 巻 8 号 p. 673-676
発行日: 1966/08/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (201K) -
鈴木 亮1966 年 32 巻 8 号 p. 677-688
発行日: 1966/08/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (949K)
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