巻号一覧
5 巻, 5 号
選択された号の論文の14件中1～14を表示しています
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Masao KATAYAMA1937 年 5 巻 5 号 p. 277-278
発行日: 1937/01/10
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (239K) -
Yositada TAKENOUTI1937 年 5 巻 5 号 p. 279-283
発行日: 1937/01/10
公開日: 2008/02/29
ジャーナル フリーRecently, the author reported about the contours of the divergences of displacement vector and the axis of principal strains for the net, which was spread with a vertical square frame, and deformed by a weight which was hung at the centre of the net. He also defined for a net the limit-curve of the safety domain, regarding to the form of mesh which was liable to be destroyed.
The similar methods were applied to nets as shown in Table 1.抄録全体を表示PDF形式でダウンロード (416K) -
田内 森三郎1937 年 5 巻 5 号 p. 284-286
発行日: 1937/01/10
公開日: 2008/02/29
ジャーナル フリーIt is statistically shown in this paper that the effect of liberating fry on the catch depends mainly upon the rate of number of individuals returning to the liberation area against the total number of survivors.抄録全体を表示PDF形式でダウンロード (236K) -
田内 森三郎, 三善 清旭1937 年 5 巻 5 号 p. 287-290
発行日: 1937/01/10
公開日: 2008/02/29
ジャーナル フリーBased on the yearly catches of three kinds of fishes, “Sake, ” “Burl” and “Adi”, classified according to the landing places into (1) Hokkaidô, east of Cape Erimo, (2) Hokkaidô, west of Cape Erimo, (3) The Pacific coast of Aomori, (4) Iwate, (5) Miyagi, 7(6) Hukusima, (7) Ibaragi and (8) Tiba Prefectures, the factors influencing the yield were searched for.抄録全体を表示PDF形式でダウンロード (266K) -
王 貽觀1937 年 5 巻 5 号 p. 291-294
発行日: 1937/01/10
公開日: 2008/02/29
ジャーナル フリーThe data on which the present paper is based consist of the records concerning the tagging experiments, the measurements of the carapace-breadth, and the statistics of the catches already published by Imperial Fisheries Experimental Station, Hokkaido Fisheries Experimental Station, and Sagbalin Fisheries Experimental Station. The analysis of the data has revealed that (1) the stock of the crab in each of four regions, viz., (a) Pacific coast of Hokkaido, (b) Okhotsk coast of the same, (c) coast of the same bordering the Japan Sea, and (d) the coast of Saghalin is almost independent from any other; (2) the male in the catch off Prov. Kitami of Hokkaido is mainly constituted by 4-5 year old ones, but the catch from Saghalin is mostly comprised in 5-6 year old males and 6-year old females; and (3) successive yearly survival rate is •32-•42.抄録全体を表示PDF形式でダウンロード (276K) -
宇田 道隆, 徳永 英松1937 年 5 巻 5 号 p. 295-300
発行日: 1937/01/10
公開日: 2008/02/29
ジャーナル フリーBased mainly on the latest materia's given by the local fisheries authorities in l'refs. Siduoka, Kanagawa, etc. we have investigated the catch of ‘Binnaga Maguro’ (Germo germo (Lacépède)) in relation to the hydrographical conditions.
The seasonal variations of the catch of ‘Binnaga’ in every year are nearly of the same type (Fig. 1); the so-called winter season begins in October, showing its flowering season from Dec. to Feb., and ends in the middle decade of April. And the so-called summer season begins from the late April, showing its flowering season in the interval from middle May to middle June, and ends in July.
Inspecting Fig. 2 we notice the remarkable decline of the summer catch (landed mainly at the harbours in Siduoka Pref.) in the adjacent waters of Japan.
On the other hand, the winter off-shore fishing grounds were extended year by year to the east with the increase of the landings, and now cover the waters distant about 2, 000 sea-miles from our coast.
The former fishing ground moves north-easterly from spring to summer with the advance of Kur03iWO, while the latter (in winter) accumulates in the regions along the line of subtropical convergence.
Apparently we can see the fishing grounds during the whole year rotating in the anti-cyclonic sense with the run of Kurosiwo and its back current of salty water-masses.
The optimum water temperature of the catch lies at 17°-19°C (max. at about 18°C) in Nov. -Feb., but lying at 18°-21°C (max. at about 20°C) in May and June. The catch represents 2 maxima in winter, one at the salinity of 34•6-14•9% and the other above 35•5%, while in summer only one at 34•8 %.
The shoals distributed in the region comparatively near the land lack the large-sized fishes and contain more small-sized ones than off-shore shoals.
In conclusion, summarizing the above mentioned facts, the writer (M. UDA) proposes the following hypothetical theory on the migration of Binnaga Maguro, following the instructions kindly given him by Dr. M. TAUTI: There are two partially inter-related stocks, one in the waters near the land (I) and the other in the offing (II). The former consists of the native stock A0 and the incoming stock from (II) B' (of small and partially of middle-sized fish), while the latter (II) consists of the native stock BO and the incoming stock from (I) A' (of medium and partially of small sizes).
The recent overfishing of (I), particularly of A, , caused the decline of the yield of `Binnaga Maguro' in summer.抄録全体を表示PDF形式でダウンロード (440K) -
安田 秀明1937 年 5 巻 5 号 p. 301-302
発行日: 1937/01/10
公開日: 2008/02/29
ジャーナル フリーA card was immersed in water during every other 24 hours, and exposed to air during the rest parts of time, and the length of it was measured at The ends of every immersion and of every ex-posure. From the experiment we know that: (1) Any cord, in both the dried and wetted states shortens gradually to a constant final length. In the case of cord of hard-fibres the final length is longer in the wetted state than in the dried, while in the case of soft-fibres it is a little shorter in wetted than in dried state. (2) The difference between the final length in the wetted state and That in the dried state is affected by dying. When a cord is tarred, the difference diminishes in the case of hard-fibres. On the con-trary, it increases in the case of soft-fibres. Barking a cord has no affec-tion. (3) After a number of alternate drying and wetting, each Thread of a cord of hard-fibres is tightened while the contact among threads is loosened. But a cord of soft-fibres does not show any change.
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IV. 蓋底押型模様の形状と罐内眞空度富枡 建造1937 年 5 巻 5 号 p. 303-307
発行日: 1937/01/10
公開日: 2008/02/29
ジャーナル フリーThere are two types of pressed die shape of the ends for 1/2 lb. crab cans: one the ordinary type of flat centre and the other the special type of slightly convex centre such as shown in Fig. 1 on the right of it.
The filled cans with ends of the latter type are considered handicapped in that they are liable to be mistaken for swelled cans and that the lacquered film on the inner side of the ends may be easily stripped off due to repeated diaphragmatic action of the central convex part and this will be the source of black soiling of the contents.
However the author opines that in most normal cans of them in which an adequate vacuity is maintained the diaphragmatic action is not repeated so occasionally as generally considered, but on the contrary since the under vacuum cans are easily detected by the swelling out of the central part of the ends the cans with those ends of such type are of great advantage in being assorted according to the grade of vacuum in them.
The author has studied experimentally the d aphragmatic action of the central part of the can ends which are of the convex type and has f, and that for the 1/2 lb. crab cans the boun-dary zone of swelling of the central part of the ends lies between 201 mm and 148 mm in vacuum on the average.抄録全体を表示PDF形式でダウンロード (525K) -
大谷 武夫, 薄井 與兵衛, 助川 輝武1937 年 5 巻 5 号 p. 308-310
発行日: 1937/01/10
公開日: 2008/02/29
ジャーナル フリーThe material, on which the present paper is based, was obtained from the coast of the lbaraki Prefecture in 1934 to 1936, and all sexually immature, ranging from 9•7 to 15•9 cm in body length, from 12•1 to 48•9g. in body weight. As shown in Table land Fig. 1, the fat content of the material varies seasonally, with two maxima in early summer and winter, and two minima in autumn and early spring. It is to be seen in Fig. 2 that the increase in fat with age is smaller until the body weight attains 25g. but much greater after that. A linear relation is found, as shown in Fig. 3, between the fat-content of the deviscerated body and that of viscera, the former being about five times as great as the latter.抄録全体を表示PDF形式でダウンロード (179K) -
島田 清, 金田 敬1937 年 5 巻 5 号 p. 311-312
発行日: 1937/01/10
公開日: 2008/02/29
ジャーナル フリーTable 1 gives that ash, Ca, Ca3 (PO4)2, and Mg are richer in. three so-called hard-boned teleosts, Taius tumifrons, Theragra chalcogramma, and Lateorabrax.japoaicas than in two so-called soft-boned teleosts, Cyprinus carpio and Sardinia melanosticta. As shown in Table 2, the scales of two marine fishes, Sardinia melanosticta and Cololabis saira contain much greater amount of Ca than those of a fresh water fish, Cyprinus carpio.抄録全体を表示PDF形式でダウンロード (117K) -
薄井 與兵衛, 助川 輝武, 中島 久1937 年 5 巻 5 号 p. 313-314
発行日: 1937/01/10
公開日: 2008/02/29
ジャーナル フリーThe “sardine cake” is manufactured in Japan by (1) boiling a lot of raw sardi ties (Sardinia melanosticta) in water, (2) squeezing as much fluid as possible from the material and (3) drying it in the sun. The present authors have ascertained that an unusually large amount of ammonia sometimes contained in the cake (about 0•2%) is due to putrefaction of the material occurring between squeezing and drying processes. Even if the raw fish was left to putrefy extremely, the cake made from it was found to contain 0•062% ammonia (Table 1). In boiling the raw fish, the same water is usually repeatedly used without being changed, so that it becomes thicker by dissolving. The authors have shown that such repeatedly used boiling water extracts every time nearly the same amount of water-soluble N (1•100-1•386 g. per litre) from the material (Table 2).抄録全体を表示PDF形式でダウンロード (114K) -
薄井 與兵衛, 助川 輝武, 周 國慶1937 年 5 巻 5 号 p. 315-316
発行日: 1937/01/10
公開日: 2008/02/29
ジャーナル フリーOf the two lakes, Hinuma and Kasumigaura, located close to the coast of the Ibaraki Prefecture, the former is much more subject to invasion of sea-water. The chemical analysis has shown (Table 2) that 0·922 mg. of Ca and 57·31 mg. af Cl are present on average in the water of Lake Hinuma, whereas 0·716 mg. of Ca and 2·178 mg. Cl are present in the water of Lake Kasumigaura. The Ca-content of the muscle of Hypomesus olidus from Lake Hinuma was found to amount to 0·097 % on the average, the same in the corresponding material from Lake Kasumigaura reaching to 0·062 % (Table 1).抄録全体を表示PDF形式でダウンロード (120K) -
宮崎 一老1937 年 5 巻 5 号 p. 317-325
発行日: 1937/01/10
公開日: 2008/02/29
ジャーナル フリーSome Decapod crustaceans among others are widely used and so very important as bait for angling fishes in Japan. In the vicinity of the kanazawa Laboratory, ghost shrimp, Upogebia major and Callianassa subterranea var. japonica, are suitable for angling the plaice, Sebastodes, and such others as Sparus, Fairs and Lateolabrax, all of which are esteemed food fihes. The snapping shrimp, Alpheus brevicristatus, and the swimming crab, Charybdis sexdentata, are used for the eel and the devil-fish, Polypus, respectively.
Callianassa burrows in clean samdy bottom of shallow water in the bay, while Upogebia in muddy ground'only. The breeding season of the former lasts from middle of March to late August and that of the latter seems to cover a comparatively short duration, that is, from May to middle of June. Alpheus lives in the muddy bed hidden in the tunnel-shape burrow which it makes underground at shallow depth. Its spawning occurs in the middle of May and lasts till late August. Charybdis may be captured by searching it on the muddy bottom grown by the water plant, Zostera, or with scattered rock-blocks.
Concerning the larval forms of afore said species our knowledge is very scanty, so the present writer gives here descriptions of them dealing mainly with their first larval stages. The descriptions and figures may be much utilized for the identification of the forms which appear in the plankton collection. Details in Figs. 3-6.抄録全体を表示PDF形式でダウンロード (1403K) -
山本 孝治1937 年 5 巻 5 号 p. 326-332
発行日: 1937/01/10
公開日: 2008/02/29
ジャーナル フリーFour days after the artificial fertilization eggs of the pond smelt, Hypomesus olidus PALLAS, were puttin 20 rials with water. Two of them were then placed in each of 10 compartments (Nos. 1-10) of a SENÔ-TAUTI'S serial incubator. They ran at temperatures differing from each other by nearly 1•5 degrees, No. 1 at the highest (19•9C) and No. 10 at the lowest (6•4°C.) With a view to determine the effects of temperature variations on the developing eggs one of the two vials in each compartment was interchan-;ed with the corresponding one in another, but the other vial in respective section was kept in situ as control. The interchange was made in 5 p.sirs, viz., No. 1 with No. 10, No. 2 with No. 9, No. 3 with No. 8, No. 4 with No. 7, and No. 5 with No. 6. The results obtained may be summarized as follows:-
1) Water temperature for normal development of the eggs ranges from 19° to 7°C.
2) The relation between the temperature (θ) and time in days (T) required for the deve- lopment of eggs may be expressed, as given by HIGURASHI and TAUTI, by the formula
Te10=constant,
in which a=0•138, The. temperature coefficient for the embryonic development of the pond smelt was found to be Q10=3•98.
3) Within the range of mean deviations 6•8°-0•6°C. in the series of temperatures 19•9°-6•4°C., the larger the temperature deviation the less the hatch-rate of the fry and the less the, time required for hatching.
4) TAUTI'S formulae concerning the relation between the mean deviations of the water tem-perature (M) and time in days (TM) and that between the former and the percentage of the hat lied fry((N-NO)M), viz.,
TO/TM-1= a2/2M2, and (N/N0)M=(N/N0)0 e- ??
where T0 and (N/N0)0 are the time and the percentage when M=0 respectively, hold true for the writer's material with the values of the constants a=0•115, c=0•017, Q10=3•16.抄録全体を表示PDF形式でダウンロード (441K)
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