巻号一覧
42 巻, 5 号
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シマイシガニのゾエア幼生本尾 洋, Antonio VILLALUZ1976 年 42 巻 5 号 p. 523-531
発行日: 1976/05/25
公開日: 2008/02/29
ジャーナル フリーSix zoeal stages of Charybdis cruciata (HERBST) which are reared in the laboratory, are described. The zoea has a rostral, a dorsal and a pair of lateral spines. There are a pair of lateral hooks on the 2nd and 3rd abdominal segments. The number of natatory hairs on the first and second maxillipeds increased by one pair at each molt, being 4, 6, 8, 10, 12 and 14, in the 1st to 6th zoea, respectively. The number of inner setae on the telson are 3+3 in stage 1; 4+4 in stages 2 and 3, 4+1+4 in stage 4, and 5+5 in stages 5 and 6. Spinal ar-rangement from proximal to distal segment of the endopodite of the first maxillipeds are 2-2-0-2-5 in stages 1-3 and 2-2-1-2-6 in stages 4-6 and that of the second maxillipeds are 1-1-4 in stages 1 and 2 and 1-1-5 in stages 3-6.抄録全体を表示PDF形式でダウンロード (538K) -
本尾 洋1976 年 42 巻 5 号 p. 533-542
発行日: 1976/05/25
公開日: 2008/02/29
ジャーナル フリーThis study deals with the larval stages of Benizuwai-gani, Chionoecetes japonicus, and with the comparison of those between C. japonicus and Zuwai-gani, C. opilio. There are two zoeae and one megalopa. The larval stages of C. japonicus are morphologically similar to those of C. opilio excepting some characters as follows: 1) Chromatophores of zoeae and megalopa are vermillion or crimson in C. japonicus and brown or reddish in C. opilio. 2) C. japonicus is generally bigger than C. opilio in zoeae and megalopa. 3) Length of postero-lateral spine on 3rd abdominal segment is more than 1. 3 times the length of the 4th abdominal segment in C. japonicus, but is shorter than (rarely equal to) that in C. opilio. 4) Ischiopodite of cheliped has no spine in C. japonicus, but it has spine in C. opilio, in megalopa.抄録全体を表示PDF形式でダウンロード (538K) -
岩崎 行伸1976 年 42 巻 5 号 p. 543-548
発行日: 1976/05/25
公開日: 2008/02/29
ジャーナル フリーIt is well known that the skipjack shoals, Katsuwonus pelamis, are often accompanied by birds, a whale, Physeter catodon, or a shark, Rhincodon typus, a timber or a floating object, and are often seen near to a bank in the ocean.
In this paper, the author has attempted to examine the frequency of the same fish size group and variations in the condition factor by a study of the body size composition of the fishes in each age group in the shoals.
The following results were obtained;
1) The shoals with birds ranged from 25cm to 80cm in body size and are mostly composed of the same age groups.
2) The fish sizes of the shoals with timber and a shark or a whale ranged from 25cm to 60cm and age groups of the shoals are constituted of more than two.
3) Each shoal of fish near banks is composed of only one age group.
4) The relationship between the body length (x) and the condition factor (y) of skipjack is as follows;
Shoal with birds y=13.20+0.14x
Shoal with a timber y=27.03-0.20x
Shoal with a shark or a whale y=24.31-0.10x抄録全体を表示PDF形式でダウンロード (373K) -
Enterobacter cloacae UFF-107株による褐変機構藤田 八束, 松本 寿子, 松田 敏生1976 年 42 巻 5 号 p. 549-556
発行日: 1976/05/25
公開日: 2008/02/29
ジャーナル フリー1. E. cloacae UFF-107 was inoculated into culture media containing 10% glucose and 5% Na-glutamate. The media were incubated at 30°C for 0, 1, 3, 5, 7 and 10 days respectively. It was observed that a substance showing optical absorp-tion at 490mμ was produced in the cultures during incubation.
2. The culture fluid was spotted on a thin-layer chromatogram (Silicagel F254) and developed by a solvent system containing n-butanol, acetone, and water in the ratio 4:3:1. Brown spots with Rf value 0.05 were detected when the chromatograms were air-dried and treated with a 20% glycine solution.
3. E. cloacae UFF-107 was inoculated into media containing 5% glucose. The media were incubated at 30°C for 5 days and then heated at 100°C for 10 minutes. After the heating, the media turned brown. No spots with an Rf value of 0.05 were recognized on the chromatogram.
4. The media inoculated with E. cloacae UFF-107 were passed through an Amberlite IRA 400 (a Cl type) column and eluted with 1 N-HCl. Various amino acids and proteins were added individually to the eluates which turned brown when they were incubated at 37°C for 2 hours.
5. When eluates containing glycine were incubated at 0-37°C for 2 hours, they turned brown at 25-37°C.抄録全体を表示PDF形式でダウンロード (543K) -
脂肪酸組成率の季節的変動上田 正1976 年 42 巻 5 号 p. 557-561
発行日: 1976/05/25
公開日: 2008/02/29
ジャーナル フリーIn the present paper, the changes in the fatty acid composition of the mackerel, Scomber japonicus, from summer to winter were examined by estimating the cubic, quadratic and linear regressions on the season. The following pattern of seasonal changes in the compositional percentage of the respective fatty acids was revealed. The contents of all the fatty acids in nonpolar lipid decreased from summer to winter, but the rates of decrease differed according to the acid, being high for 16:1 and 18:1 acids but low in the others. This difference in the rates of decrease resulted in a relative decrease in 16:0 and 18:1 acids and compensative increase in 20:5 and 22:6 acids.
In polar lipid, the content of 20:5 and 22:6 acids increased from summer to winter. This fact resulted in an increase in the compositional percentage of these acids and a compensative decrease in 16:0 and 18:1 acids. The content as well as the rates of change in fatty acid content were far smaller in polar than in nonpolar lipid. Consequently the respective acids in total lipid showed seasonal patterns similar to those of nonpolar lipid.抄録全体を表示PDF形式でダウンロード (292K) -
坂口 守彦, 河合 章1976 年 42 巻 5 号 p. 563-569
発行日: 1976/05/25
公開日: 2008/02/29
ジャーナル フリーVigorous aeration which promoted the growth of Escherichia coli resulted in a remarka-ble repression of trimethylamine N-oxide reductase formation in cells. The response in enzyme formation to the aeration was somewhat quicker than that of whole cell growth. The aeration, however, hardly brought about any inactivation of enzymes which cells could acquire.
Cell suspensions incubated under aerobic conditions, or shifted from anaerobiosis to aerobiosis, exhibited significantly low enzyme activity as compared with those incubated in the anaerobic environment.
It was concluded from this that oxygen inhibits not only the formation of this enzyme but also its activity.抄録全体を表示PDF形式でダウンロード (322K) -
アスコルビン酸およびイノシトールの適正添加量弟子丸 修, 黒木 克宣1976 年 42 巻 5 号 p. 571-576
発行日: 1976/05/25
公開日: 2008/02/29
ジャーナル フリーIn order to determine the requirements of prawn Penaeus japonicus for ascorbic acid and inositol, the effects of dietary levels of dietary levels of these two vitamins on growth and feed efficiency were examined by using a purified test diet devised by the authors.
1) Growth depression occurred as the dietary level of ascorbic acid increased within the range tested from 0 to 1.0%, the best growth resulting when the diet contained no ascorbic acid. The amount of food ingested by the prawn also decreased with increasing ascorbic acid in the diet. Feed efficiency, however, remained almost constant among the test diets. On the other hand, the diets either lacking or containing 0.1% ascorbic acid produced high mortalities at a high water temperature of 28-30°C and particular signs such as decolorization and development of a greyish-white color on the margin of the carapace, the lower part of the abdomen and on the tips of walking legs.
2) Within the range from 0 to 0.4%, higher levels of dietary inositol resulted in higher growth rates. The prawns fed diets lacking or containing 0.04% inositol developed loss of appetite, poor growth, low feed efficiency and high mortality. Most of the prawn on these two diets died just after molting.
3) Adequate levels of these two vitamins in the test diet were assumed to be about 0.3% for ascorbic acid and about 0.4% for inositol.抄録全体を表示PDF形式でダウンロード (314K) -
天野 秀臣, 橋本 周久, 松浦 文雄1976 年 42 巻 5 号 p. 577-581
発行日: 1976/05/25
公開日: 2008/02/29
ジャーナル フリーMyoglobins (Mb's) of the bluefin tuna and skipjack, the N-termini of which are acetylblocked as previously reported, were analyzed for N-terminal amino acid sequence and C-terminus. The purified Mb specimen of each species was digested with “Pronase P” and from the digest 3 acetylpeptides were separated by paper chromatography. Their amino acid compositions were assayed by the usual method and their sequences by the carboxypeptidase and other methods. It was concluded from the data obtained that the N-terminal sequence for both Mb's is acetyl-Ala-Asp-Phe-Ser-Glu-Gly. The C-terminal amino acid of both Mb's was identified as Gly by the hydrazinolysis method.抄録全体を表示PDF形式でダウンロード (296K) -
成長と飼料効率におよぼすリノレン酸とω3高度不飽和酸の効果藤井 正人, 米 康夫1976 年 42 巻 5 号 p. 583-588
発行日: 1976/05/25
公開日: 2008/02/29
ジャーナル フリーThe growth and feed efficiency responses of red sea bream fingerlings to ω3 fatty acids were determined by supplementing a corn oil diet and a lauric acid diet with linolenic acid and/or ω3 polyunsaturated fatty acids (PUFA). The fish fed a linolenic acid supplement showed poor growth and feed efficiency even at a 3 or 4% level, in comparison with those fed the control diet YR-1 of pollack residual oil. PUFA fed at a 2% level supported excellent growth and feed efficiency as did the pollack residual oil.抄録全体を表示PDF形式でダウンロード (247K) -
高木 光造, 村山 花子, 相馬 すが1976 年 42 巻 5 号 p. 589-594
発行日: 1976/05/25
公開日: 2008/02/29
ジャーナル フリーConcentrations of polychlorinated biphenyls (PCB) were determined in the muscle of 36 species of marine animals collected in the sea near Hakodate in 1973-1975.
Analysis proved that PCB concentrations in the muscle ranged between 0.01-0.18ppm, i. e., a maximum value of 0.18ppm in Tribolodon hakonensis hakonensis, and a minimum value of 0.01 ppm in Osmerus dentex.
The muscle PCB contents were high in proportion to the high fat contents in the species of Tribolodon hakonensis hakonensis, Sardinops melanosticta, Trachurus japonicus, and Pleurogrammus azonus with the exception of Pneumatophorus japonicus japonicus and Astroconger mvriaster. On the contrary, PCB contents were generally low in proportion to the low fat contents in 26 species of fish with the exception of Paralichthys olivaceus, Fugu vermicularis porphyreus, Kareius bicoloratus, and Hexagrammos otakii.
Consequently, the level of PCB concentrations in the muscle of fish in this area was found to be extremely low as compared with that in fish in other polluted areas, i. e., the Inland sea of Japan and Tokyo Bay.抄録全体を表示PDF形式でダウンロード (301K)
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