巻号一覧
21 巻, 1 号
選択された号の論文の13件中1～13を表示しています
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小泉 孝1955 年 21 巻 1 号 p. 1-5
発行日: 1955/05/25
公開日: 2008/02/29
ジャーナル フリーThe writer tried to see whether there are some differences between the morning and evening catches by a yellow Kurehalon KP net and these by a brown cotton net dyed with tannin. It was found that the skipjack, jack mackerel, etc., responded in the same manner to th yellow and brown nets.抄録全体を表示PDF形式でダウンロード (210K) -
飯高 勇之助1955 年 21 巻 1 号 p. 6-11
発行日: 1955/05/25
公開日: 2008/02/29
ジャーナル フリーAs the second step in the approach to the final aim that was related in the previous report1), a series of model experiments of the purse seine was made, with the purpose of knowing the sinking movement of the bottom margin of the net. The model gear which was reduced to 1/250 to the full scale was made based on TAUTI's principle2) (Table 1, 2 and 3). This model net was laid out in the standing water through a circular frame (Figure 1), and the sinking appearance of its lead line was observed and photograghed by the use of a stroboscopic illumination (Plate 1).
As the results of this experiments, it was supposed that the sinking of the bottom margin is in a uniform motion at the eary stage and that in the case of this type of gear, the pursing operation is begun when the bottom margin has sunk at the depth of about 15 fathoms (Figure 4). A few practical examples of records of echo sounder, endorsing the above results, were added (Plate 2 and 3).抄録全体を表示PDF形式でダウンロード (2197K) -
井上 実1955 年 21 巻 1 号 p. 12-14
発行日: 1955/05/25
公開日: 2008/02/29
ジャーナル フリーThe fishing rate per month is calculated by Tauti's method, using the statistics of the sardine purse net fisheries at Katagai, Toyoumi, Ôhara in Chiba prefecture; and it is shown that the fishing power of sardine purse net fleets is raised several times as large by means of fish finders. Finally the fishing power of Katagai fleets is estimated.抄録全体を表示PDF形式でダウンロード (161K) -
Akira OCHIAI1955 年 21 巻 1 号 p. 15-19
発行日: 1955/05/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (311K) -
Tokinaru ABE1955 年 21 巻 1 号 p. 20-23
発行日: 1955/05/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (593K) -
成長について井上 泰1955 年 21 巻 1 号 p. 24-26
発行日: 1955/05/25
公開日: 2008/02/29
ジャーナル フリーA study on growth of Fulvia mutica (REEVE) from Suo-dada, Inland Sea of Japan was carried out. The results are as follows:
(1) Ring formation of shell of this bivalve seems to take place once in a year, during the months August-January in the first ring, and April-January in the second and other ones. Causative factors for ring formation appear to be water temperature and physiological rhythm of spawning.
(2) Shell-length becomes about 69mm., 85mm. in one and two full age respectively. In shells of ages more than three, shell-length is above 85mm.抄録全体を表示PDF形式でダウンロード (185K) -
産卵期について井上 泰1955 年 21 巻 1 号 p. 27-29
発行日: 1955/05/25
公開日: 2008/02/29
ジャーナル フリーThe results of the present investigation on a bivalve, Fulvia mutica (REEVE) from Suo-nada, Inland Sea of Japan are as follows:
(1) This shell has two spawning seasons in a year, viz., February-June, and August-Nove-mber. April-May and September-October are in heigt of the spawning season respectively.
(2) This animal is a hermaphorodite.
(3) Sexual maturity seems to be reached one year after hatching, and the biological minimum size is about 3.8cm. in shell-length.
(4) Sexual castration is found to exist in those individuals having cercaria parasite: in the gonad of such shells, no ovary is found. A few spermatozoa present.
(5) Mature eggs measure 110μ and 75μ in longer and shorter diameter respectively. Spermatozoa about 60μ in overall length.抄録全体を表示PDF形式でダウンロード (223K) -
杆晶体重量の季節的変化井上 泰1955 年 21 巻 1 号 p. 30-31
発行日: 1955/05/25
公開日: 2008/02/29
ジャーナル フリーAn observation on seasonal fluctuation of weight of crystalline style of Fulvia mutica (REEVE) fished from Suo-nada, Inland Sea of Japan has been done. The result may be summarized as follows:
(1) The weight in question shows a seasonal change: it gradually decreases from spring towards summer, gradually increases from autumm and reaches to its maximum in winter.
(2) The weight in February is about twice in comparison to that in July in the animal of the same shell-length.
(3) No individual with no crystalline style is found to exist, but those which are having vestigial or considerably thin crystalline style are found in small number. Thin crystalline style is found to have a well defined spiral groove running longitudinally.抄録全体を表示PDF形式でダウンロード (148K) -
猪野 峻, 相良 順一郎, 浜田 颯子, 玉河 道徳1955 年 21 巻 1 号 p. 32-36
発行日: 1955/05/25
公開日: 2008/02/29
ジャーナル フリーDuring the period from October 1953 to March 1954 innumerable number of starfish, Asterias amurensis, made a sudden attack on the clam beds along the coast of Tokyo Bay and devoured large quantities of cultured clams. At that time the spawning season of these starfish was inferred to be either May or July from the fact that the same species spawns in these months in different localities.
However, a series of field surveys consecutively conducted since the outburst of this predator have led us to the conclusion that its spawning season extends frcm January to April with the peak in late February through early March(Fig. 1 and Table 1).
The water temperature in Tokyo Bay during the above mentioned spawning seasonn approximates to that in the coastal waters of Hokkaido in July, when the starfish is known to spawn in this locality(Fig. 3). In addition, young starfish with arm lengths measuring about 5mm. were found in abundance through the early half of March, attaching on the colonies of Styela plicata LESUEUR and Coreila japonica HERDMAN etc. (Fig. 2).
These pieces of evidence may be sufficient to support the view that the majority of this starfish spawn in late February through early March in Tokyo Bay.抄録全体を表示PDF形式でダウンロード (315K) -
アルカリパルプ廢液の毒性について河辺 克已, 富山 哲夫1955 年 21 巻 1 号 p. 37-41
発行日: 1955/05/25
公開日: 2008/02/29
ジャーナル フリーThis paper deals with the estimation of poisonous effect on Scenedesmus obliquus and Carassius auratus due to presence of waste liquors from caustic soda-digests of the knot and the chips ?? and further with searching for the poisonous ingredients of the wastes. Results obtained can be summarized as follows:
1) The inhibition of growth of Scenedesmus due to the waste from the knot-digest was observed until the waste be diluted 100 times. The inhibition effect was as much decreased as abaut one-tenth of the original wase on acidifying the warm waste with hydrochloric acid followed by filtration (Figs.1 and 2).
2) The 24-hr death responses of fish to the wastes from the knot- and the chips-digest were estimated to be at dilutions of 1/800 and 1/90, respectively (Fig. 3). The observation that the fish showed in presence of the wastes a dark coloration and unbalanced state accompanied with an abrupt mad swim, implies that the poisonous substance or subtances will primarily attack the nervous system.
3) The insoluble part obtained by the acid-treatment also showed the poisonous effect to nearly the same extent as the original waste. Most of the poisonous substances in this part could be extracted wish ether. The 24-hr death response to the, ethereal extracts of the liquors from the knot- and the chips-digest were estimaed to be 170 and 340 p. p. m., respectively (Fig. 3).
4) Taking into account the contents in the knot of pitch abietic acid, pinosylvin, and pinosylvin monomethylether, and data for the death response of the fish to these compounds and also to the autoclaved products of th ?? m dissolved in N-N2OH, it will be rnast probable that pitch abietic ?? cid will be one of the principal compounds responsible for hazard of the waste to aquatic organisms (Fig. 4).抄録全体を表示PDF形式でダウンロード (357K) -
フルフラール,アニリンおよびその他の溶媒による濃縮について稲垣 誠, 松田 和夫1955 年 21 巻 1 号 p. 42-45
発行日: 1955/05/25
公開日: 2008/02/29
ジャーナル フリー(I) We studied the degree of concentration of liver oils by furfural under various conditions, and the results obtained were as follows.
(a) The good concentrating ratio is obtained at from 20°C. to 30°C., and the good yield is obtained at 60°C..
(b) The volume of solvent about 3 times of liver oil is a proper quantity to get the good results.
(c) Under the same volume of solvent, the repeated extraction showes the best result.
(d) The result of higher iodine value oil is better than that of lower oil.
(II) Aniline proved of use for concentrating vitamin oils, as it was proposed a new solvent.抄録全体を表示PDF形式でダウンロード (253K) -
1955 年 21 巻 1 号 p. 54b
発行日: 1955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 (43K) -
1955 年 21 巻 1 号 p. 54a
発行日: 1955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 (43K)
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