巻号一覧
27 巻, 9 号
選択された号の論文の8件中1～8を表示しています
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種族の系統判別への利用安田 秀明1961 年 27 巻 9 号 p. 825-830
発行日: 1961/09/25
公開日: 2008/02/29
ジャーナル フリーAs a first verification of the surmized duality of saury pike stock in Japanese waters, a few results of granographical rearrangement of existing data are presented in the following respects:
1. From HATANAKA's1) data a conclusion was drawn that saury pike forms two scale rings every year, in February and in September each.
2. By estimating the body-length to be reached at the time of scale-ring formation from those measured for saury pike caught in a best season, May (from the Japan Sea), and in October (from the Pacific), respectively, and putting down these two kinds of values for body-length together in a graph constructed with existing data of monthly body-length of saury pike7), a conclusion was arrived at that two different sequences of growth-curves should be assigned to the catches from the Japan Sea and those from the Pacific, respectively (Fig. 4). The duality in stock indicated by this conclusion may be supported by the granographical suggestion of two groups of saury pike, one hatched in a season extending from late spring to summer and the other from late autumn to winter.
3. The duality of saury pike stock were also pointed to about the grains on scale reported by HOTTA2), those on otolith, monthly change of the relationship between body-length and body-weight and the local and seasonal variations in distribution for egg and fry.抄録全体を表示PDF形式でダウンロード (379K) -
鈴木 亮1961 年 27 巻 9 号 p. 831-834
発行日: 1961/09/25
公開日: 2008/02/29
ジャーナル フリー1) Almost all hybrids produced artificially from Rhodeus ocellatus ?? × Acheilognathus tabira ??, Rhodeus ocellatus ?? × Acheilognathus limbata ??, Rhodeus ocellatus ?? × Acheilognathus cyanostigma ??, Rhodeus ocellatus ?? × Acheilognathus lanceolata ?? and Acheilognathus lanceolata ?? × Rhodeus ocellatus ?? are male. Only few hybrid females from Rhodeus ocellatus ?? × Acheilognathus lanceolata ?? and Rhodeus ocellatus ?? × Acheilognathus cyanostigma ?? can be reared to adult size, while their ovaries are not developed.
2) Hybrid males display the spawning behavior to the control female or hybrid female, though the behavior is not intensive as in the case of the control and the oviposition does not occur.
3) The testes of many hybrids are nearly normal in external form, but in some hybrids they are shrunken or entirely absent. None of the spermatozoa is observed in hybrid testes.抄録全体を表示PDF形式でダウンロード (426K) -
K. SIVASUBRAMANIAM1961 年 27 巻 9 号 p. 835-845
発行日: 1961/09/25
公開日: 2008/02/29
ジャーナル フリーThe soaking time increases in the direction of hauling.
There is no signification variation of yellowfin catch, with increasing hours of soaking.
Probably a fair amount of yellowfin tuna are hooked when the gear is sinking to the settling depth or when being hauled to the surface.
The yellowfin catch has a position of maximum catch, on the longline. Probably albacore and marlins also do so. But big eye tuna does not show such a phenomenon very clearly like yellowfin.
Schooling or aggregating habit of yellowfin is capable of nullifying the effect of soaking time on the longline catch.
Probably there is some variation in the tuna catch with the time of the day.
Behaviour of tuna has a major effect on the longline catch. Probably this factor exhibits greater effect on the big eye tuna catch than on the yellowfin catch by longline.抄録全体を表示PDF形式でダウンロード (565K) -
石井 一美, 小長谷 庸夫1961 年 27 巻 9 号 p. 846-849
発行日: 1961/09/25
公開日: 2008/02/29
ジャーナル フリーIn order to find out the most fruitful method for studying the state of the purse seine in operation, the test were made in the water with under-water current on 1/150 and 1/50 scale models by Tauti's principle and the real seine.
The results obtained from those experiments are as follows:
1) As shown in Fig. 1 the force acting on the corkline was concentrated chiefly on wings and back (Max; 10kg/m).
2) From the model experiments, the tension of the purse line in operation depends on under-water current. In actual observations the tension was 150kg in setting, 325kg in hauling and 1750kg in surfacing. Those figures confirm the results obtained from the model experiments.
3) The sinking velocity of the bottom margin was about 7.0m/min and the sinking depth of the net foot was almost 102m.
4) As shown in Fig. 5 the normal transformations by operation of the net were influenced by the current, and the conditions most favourable for operation were Type A (no current), and B (mashio).抄録全体を表示PDF形式でダウンロード (508K) -
飼育水に塩化アンモニウム,塩化ナトリウムを溶入した場合の燐化合物の変動中野 智夫1961 年 27 巻 9 号 p. 850-854
発行日: 1961/09/25
公開日: 2008/02/29
ジャーナル フリーThe aim of this research is to know how the qualities of water, especially the contents of ammonium- and sodium chloride therein, affect on physiological function of the phosphorus compounds in fish muscle.
Experiments were carried out using gibel at 22-27°C of water temperature. The results are summarized as follows:
1) 0.01-0.05M ammonium chloride soon caused the decrease of 7'P and CP with an inclination of rise of IP in the muscle, but 0.02-0.05M sodium chloride had very little effect on them. Thus the effect of ammonium ion on fish was stronger than that of sodium ion so far as to the change of amount of phosphorus compounds in muscle is concerned.
2) There are no remarkable differences in the post-mortem changes of 7'P and CP in meat between the fishes reared in the presence and absence of ammonium chloride, respectively.抄録全体を表示PDF形式でダウンロード (306K) -
冨安 行雄, 豊水 正道1961 年 27 巻 9 号 p. 855-858
発行日: 1961/09/25
公開日: 2008/02/29
ジャーナル フリーMuch attention has been given to discoloration of oil on fishery products, and it has been pointed out that the reaction between carbonyls in oxidized oil and volatile basic nitrogenous substances resulted in discoloration of oil.
Present paper is concerned with the influence of bacterial growth on discoloration of oil. The authors found that discoloration is promoted by the bacterial growth, and differences in its intensity are observed according to the species of bacteria, among which those of Vibrio, Micrococcus and Bacillus are the most active. In this case, the intensity of discoloration is proportional not to volatile basic nitrogen contents but to peroxide value. Moreover, development of strong discoloration by autoxidation of oil under a sterile condition after longer period than after the periods under existence of bacteria shows that volatile basic nitrogenous substances produced by bacteria are not essential to discoloration of oil. It is therefore reasonable to conclude that discoloration of oil by bacteria is promoted not by production of volatile basic nitrogenous substances but by acceleration of oil oxidation.抄録全体を表示PDF形式でダウンロード (227K) -
橋本 芳郎, 堤 淳三1961 年 27 巻 9 号 p. 859-866
発行日: 1961/09/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (470K) -
1961 年 27 巻 9 号 p. 870
発行日: 1961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 (32K)
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