巻号一覧
37 巻, 8 号
選択された号の論文の19件中1～19を表示しています
- |<
- <
- 1
- >
- >|
-
森 勇, 桑野 雪延1971 年 37 巻 8 号 p. 687-690
発行日: 1971/08/25
公開日: 2008/02/29
ジャーナル フリーThe results of three test catches conducted outside Nagasaki port, at places 20m, 40m, and 60m away from an artificial fish-reef, in early November 1963 and in late January 1964, elucidated that (1) the shoals of red sea bream over 3 years old (consisting chiefly of those whose fork lengths were 30cm-32cm) in this area can be found not only in autumn, their spawning season, but also in winter, (2) the young found in autumn went away from the reefs in winter and (3) the horizontal distribution of this fish at night was most concentrated at places 20m-40m away from the artificial fish-reefs both in autumn and winter.抄録全体を表示PDF形式でダウンロード (216K) -
長浜 嘉孝, 山本 喜一郎1971 年 37 巻 8 号 p. 691-698
発行日: 1971/08/25
公開日: 2008/02/29
ジャーナル フリーThe detailed morphological changes of the prolactin cells in the pituitary gland of medada (Oryzias latipes) during a short period after transferring the fish from sea water to fresh-water were investigated by means of light and electron microscopes.
The prolactin cells of the fresh-water medaka are stained strongly with azocarmine G and contain secretory granules measuring 200-300mμ in diameter. On the contrary, the cells of the sea water fish are small in size and weak in staining affinity for azocarmine G. The secretory granules are small in size and number, and are variable in shape. On the other hand, one to three hours after transferring the sea water fish to fresh-water, their cytoplasm is seen to become occupied with newly synthesized small granules. During these stages, the formation of granules in the Golgi apparatus and the extrusion of granules through the cell membrane were frequently observed. Along with the lapse of time after the transfer, the cells showed increase in size and acquire a staining affinity for azocarmine G. Thus, the experimental evidence obtained in the present study seems to support the view that prolactin cells secrete one kind of hormone which plays an important role for the adaptation of the fish to fresh-water.抄録全体を表示PDF形式でダウンロード (2763K) -
イワガニの生殖器の構造千葉 晃, 本間 義治1971 年 37 巻 8 号 p. 699-706
発行日: 1971/08/25
公開日: 2008/02/29
ジャーナル フリーThe present paper deals with histological observations of the reproductive organs of the lined shore crab, Pachygrapsus crassipes, (Grapsidae, Brachyura), known as a common crab which widely inhabits the rocky beaches of the Japanese Islands. The materials used were collected from the coast of Niigata City, facing the Japan Sea, and the period of collection extended from April to November, 1969.
The male reproductive organ consists of six parts, and are as follows: the testis, coiled vas deferens, median vas deferens, prostate gland, ejaculatory duct, and external penis. The thicker part of the epithelium of the coiled vas deferens produces the secretory droplets, which are weakly positive to PAS reaction, and are released into the lumen. The prostate gland, consisting of many blind tubes with a simple layer of epithelium, produces secretory droplets of the spindle shape that become stained with basophilic dyes. Both types of secretory droplets reach the ejaculatory duct, and move to the basal portion of the penis together with spermatozoa. While the outer surface of the penis is coated with a chitinous layer, its epithelium constituting an inner duct is invaginated deeply into the cavity.
The female reproductive organ consists of the ovary, chitinated short duct, and the seminal receptacle. In the central part of the ovary a germinal center is visible, and the oocytes develop and migrate toward the cortical region of the ovary. A simple layer of the columnar epithelium of the seminal receptacle produces the basophilic substance in colloidal form which are discharged into the lumen. The secretory function of this epithelium is more active in the virgin crab than in crabs after copulation.
There could not be seen spermatophore and/or its related material anywhere in the gonoducts of this crab.抄録全体を表示PDF形式でダウンロード (2659K) -
山崎 文雄1971 年 37 巻 8 号 p. 707-710
発行日: 1971/08/25
公開日: 2008/02/29
ジャーナル フリーThe present study was carried out to clarify the morphology and the number of chromosomes that the ayu represents. The material, Plecoglossus altivelis, was obtained from Lake Biwa, a lake in the main island of Japan. The air drying technique was used to obtain chromosome preparations of kidney tissues after injection of 0.5%. colchicine. The diploid number of chromosomes in the ayu amounted to 56, including 12 biarmed and 46 telo- or acrocentric chromosomes. The number of arms was 68. Four pairs of small dot like chromosomes were also observed.抄録全体を表示PDF形式でダウンロード (707K) -
重複計数とS型の読み取り値について柴田 恵司1971 年 37 巻 8 号 p. 711-719
発行日: 1971/08/25
公開日: 2008/02/29
ジャーナル フリーA preliminary consideration and method is presented for calculating the fish abundance index in the S-type echo counter for estimating fish stocks of concentrated fish.
i) The mean density of fish per unit volume of water sampled is: n=4πr∑T∑PR112/P012(r1-r2)φnpσf
ii) The total quantity of fish distributed around the waters surveyed is: Ns=∑(ni+Δn/2)(r1-r2)Ai
The next paper will deal with the practical application of the above method.抄録全体を表示PDF形式でダウンロード (433K) -
手島 新一, 金沢 昭夫1971 年 37 巻 8 号 p. 720-723
発行日: 1971/08/25
公開日: 2008/02/29
ジャーナル フリーIn the present study, the utilization and biosynthesis of sterols in Artemia salina were investigated. The results obtained are as follows:
1) In spite of being supplied with the two types of diets containing ergosterol, stig-masterol, β-sitosterol, campesterol, and unknown sterol, Artemia was found to contain only cholesterol as a sterol. The result suggested that Artemia may modify these sterols to chole-sterol.
2) It was shown by the tracer experiment that Artemia did not incorporate acetate into sterols. The result indicated that Artemia may lack sterol-synthesizing ability.抄録全体を表示PDF形式でダウンロード (217K) -
安元 健, 橋本 芳郎, Raymond BAGNIS, John E. RANDALL, Albert H. BANNER1971 年 37 巻 8 号 p. 724-734
発行日: 1971/08/25
公開日: 2008/02/29
ジャーナル フリーSpecimens of surgeonfishes, Ctenochaetus striatus and Acanthurus lineatus, collected in Tahiti contained both fat-soluble and water-soluble toxins. The fat-soluble toxin was purified by column chromatography and compared with reference ciguatoxin by thin layer chromatography. The results clearly indicated that it is chromatographically identical with ciguatoxin. It was also present in the stomach contents strongly supporting the previous hypothesis that the surgeonfishes obtain ciguatoxin from their diet and transfer it to the carnivores through food chain. The water-soluble toxin found in the stomach contents was non-diffusible through a cellophane membrane, extractable with 1-butanol from aqueous solution, positive to both the Dragendorff and ninhydrin reagents, and showed hemolytic and ichthyotoxic properties.抄録全体を表示PDF形式でダウンロード (663K) -
井村 孝嗣1971 年 37 巻 8 号 p. 735-739
発行日: 1971/08/25
公開日: 2008/02/29
ジャーナル フリーThough a large number of nucleases have been investigated, little is known about the enzymes in fish. The present investigation was undertaken to elucidate the property and function of the nucleases in fish. As a first step in this programme, the RNA-hydrolyzing enzyme in the pyloric caeca of rainbow trout was studied. The frozen pyloric caeca was homogenized in 10 volumes of 0.25M sucrose solution, and the homogenate was filtered through a gauze. The filtrate was used as the enzyme solution. The enzyme activity was estimated from readings obtained for absorbance at 260mμ of the acid soluble degradates from RNA. In the pyloric caeca of rainbow trout, two kinds of RNA-hydrolyzing activities were observed. One of the activities was observed at the acidic pH (pH optimum 5.5) and the other at the alkaline pH (pH optimum 8.75). In this report, some properties of the alkaline RNA-hydrolyzing enzyme are described. The activity level of the enzyme is similar to that of the enzyme found in rat pancreas. This enzyme is very labile, but in the presence of Ca++, the enzyme gets stabilized specifically to pH and heat. The enzyme is characterized by its marked stabilization with Ca++抄録全体を表示PDF形式でダウンロード (309K) -
陸水域における窒素固定細菌の分布河合 章, 菅原 庸1971 年 37 巻 8 号 p. 740-746
発行日: 1971/08/25
公開日: 2008/02/29
ジャーナル フリーIn aquatic environments, nitrogen fixation is one of the most important processes in nitrogen cycle, on the account that the process is responsible for the recovery of nitrogen loss caused by denitrification and that the productivity of the water region is sometimes restricted by the nitrogen budget of the region.
In the first step of the study, the authors have intended to obtain the information about the distribution of nitrogen fixing bacteria in various water regions, M. P. N. method with the liquid media containing sucrose and non-nitrogenous compound being used for the enumeration of the bacteria.
This paper is concerned primarily with the occurrence and abundance of nitrogen fixing bacteria in some fresh water regions. In Lake Biwa and Lake Yunoko, the number of the bacteria was somewhat small in the water i.e. 10-1-102 cells/ml, while, 102-104 cells per 1g of the bacteria were detected in the bottom sediments of the lakes.抄録全体を表示PDF形式でダウンロード (390K) -
海水域における窒素固定細菌の分布河合 章, 菅原 庸1971 年 37 巻 8 号 p. 747-754
発行日: 1971/08/25
公開日: 2008/02/29
ジャーナル フリーBy the use of the method reported in the previous paper, the distribution of nitrogen fixing bacteria was studied in some sea water regions. The standing crop of the bacteria in the water was 10-1-102 cells/mL in inland bays such as Maizuru Bay and Kumihama Bay in Kyoto Prefecture, while the number was quite small in offshore waters in Suruga Bay and Sagami Bay i.e. 0-800 cells/L.
In the water of East China Sea, the open sea, the standing crop of the nitrogen fixing bacteria was as small as 0-400 cells/L, which were detected mostly in the surface water above 100m, and the bacterial number decreased rapidly with the depth below around 100m.抄録全体を表示PDF形式でダウンロード (440K) -
7変異型と遺伝的交配沼知 健一1971 年 37 巻 8 号 p. 755-760
発行日: 1971/08/25
公開日: 2008/02/29
ジャーナル フリーSeven different α-glycerophosphate dehydrogenase (α-GDH) isozyme patterns were electrophoretically observed in the white muscle cell-lysates of saury, Cololabis saira, from off the North Pacific coast of Japan and the East China Sea. The patterns indicated that they are controlled by four codominant alleles at an autosomal locus. The occurrence of hybrid isozymes in the heterozygotes suggests that the hybrid isozymes as well as other isozymes are of dimeric structure. Additional α-GDH isozymes which are controlled by at least two distinct loci were detected. It was found that a large scale screening of enzyme types for population analysis can be facilitated by the use of cell-lysates produced by thawing the frozen tissue. It is proposed that the dried cell-lysate-soaked filter paper and the tissue block taken in the agglutination test tray be used for population analyses of this kind because of the convenience in transporting and storing a large number of samples.抄録全体を表示PDF形式でダウンロード (2441K) -
鴻巣 章二1971 年 37 巻 8 号 p. 763-770
発行日: 1971/08/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (582K) -
須山 三千三1971 年 37 巻 8 号 p. 771-776
発行日: 1971/08/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (425K) -
関 伸夫1971 年 37 巻 8 号 p. 777-783
発行日: 1971/08/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (562K) -
天野 慶之1971 年 37 巻 8 号 p. 784-787
発行日: 1971/08/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (330K) -
宮沢 啓輔1971 年 37 巻 8 号 p. 788-794
発行日: 1971/08/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (487K) -
大石 圭一1971 年 37 巻 8 号 p. 795-799
発行日: 1971/08/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (294K) -
安元 健1971 年 37 巻 8 号 p. 800-805
発行日: 1971/08/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (426K) -
渡辺 泰男1971 年 37 巻 8 号 p. 806-810
発行日: 1971/08/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (327K)
- |<
- <
- 1
- >
- >|