巻号一覧
30 巻, 11 号
選択された号の論文の11件中1～11を表示しています
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藤岡 城1964 年 30 巻 11 号 p. 877-883
発行日: 1964/11/25
公開日: 2008/02/29
ジャーナル フリーHistological observation was made on the reparative process of the mantle of the pearl oyster after a small portion (circular, about 1cm in diameter) of the mantle was resected in the pallial zone or the central area. Oysters used were of 2 to 3 years of age.
Experiments were done during the months of August to October at water temperature of 25 to 28°C.
The results obtained are as follows:
1. Within 2 to 3 days after operation the cut surface is completely covered by the layer of epithelial cells spread out from the cut edges.
The shell and inner folds are formed on the epithelial layer, about 10 days after operation in case of the pallial zone and 13-17 days in case of the central area. The middle fold appears 13-17 days and 19 days after operation, respectively.
After about 24 days a groove from which a periostracal substance is secreted is formed by the depression of a part of the outer epidermis, though the folds are still small in the whole shape.
Observation as a whole suggest that every portion of the mantle has the capacity of regeneration and that of formation of three kinds of folds and a periostracal groove.
2. Usually within 5 to 7 days after operation regenerating mantle tip spread out from the surrounding cut surface unite with each other.
On the area of union small pearl sacs (seed pearl-sacs) are frequently formed owing to the depression of the outer epidermal layer.抄録全体を表示PDF形式でダウンロード (2211K) -
久保 伊津男, 石渡 直典1964 年 30 巻 11 号 p. 884-888
発行日: 1964/11/25
公開日: 2008/02/29
ジャーナル フリーIt has been known1) ?? 3) that the lobster has a crepuscular type of daily activity with two peaks in catch. But the mechanism for the bimodality of the activity is yet unknown.
In the present investigation, catch experiments and measurements of under water light intensity in the fishing ground of the lobster were carried out simultaneously, and an analysis was made with regard to the relationship between the activity and the light intensity. The results of the experiments are given in Table 3, and Fig. 2. Basing upon the results obtained from the present experiments, it may be said that the mechanism in question is as follows: sudden changes of the under water light intensity in dawn or dusk give stimulus for activity of the lobster, and consequently increase the catch of the lobster (Fig. 2).
Under water light intensity ranges 2.4-3.5×10-4 and 2.2-2.8 × 10-4μW/cm2 in full moon night (moon-age 15) and new moon night (moon-age 4.3) respectively.抄録全体を表示PDF形式でダウンロード (959K) -
マグロ延縄活魚餌料の死亡および離脱について岡林 正十郎1964 年 30 巻 11 号 p. 889-892
発行日: 1964/11/25
公開日: 2008/02/29
ジャーナル フリーOn the effect of aliving fish for tuna long-line bait, the rate of death and hooking off are, comparatively tested under different conditions as the position of hooking (Fig. 1) and the kinds of fish for bait. The results obtained are as follows:
1) In three kinds of bait fish, young yellow tail, Seriola quinqueradiata (TEMMINCK and SCHLEGEL), shows small number of death but large number of hooking off, mackerel, Scomber tapeinocephalus BLEEKER, shows large number of both death and hooking off and horse mackerel, Trachurus trachurus (LINNÉ), is seemed to be best for aliving bait showing small in number of both death and hooking off which are shown in Table 1.
2) The number of death and hooking off increase with almost same rate with elapsed time in every kinds of bait respectively. The position of hooking c and d are comparatively large number of both death and hooking off as shown in Fig.2.
3) The survival rate after six hours hooking, the position of hooking a is nearly 75 percent, b is over 60 percent and c and d are under 50 percent except horse macherel as shown in Fig.3.抄録全体を表示PDF形式でダウンロード (223K) -
濾紙電気泳動法による貝類外套膜外液の酸性粘液多糖類およびPAS-陽性物質について小林 新二郎1964 年 30 巻 11 号 p. 893-907
発行日: 1964/11/25
公開日: 2008/02/29
ジャーナル フリー1. A study was made, by means of paper electrophoresis, of the relationship between the distribution of proteins, acid mucopolysaccharides and PAS-positive materials in extrapallial fluid, and the calcium carbonate crystals of shells. Fifteen molluscan species were used.
2. The extrapallial fluid of the species with aragonite-shell and aragonite- and calcite-shell contains a much more complex system of proteins, acid mucopolysaccharides and PAS-positive materials than that of the species with calcite-shell.
3. In all the species examined, hyaluronate-like substances and PAS-positive materials, possibly neutral heteropolysaccharides, were commonly found in the extrapallial fluid. This fact suggests that these two kinds of substances are components essential to the formation of the organic matrix of shell, in association with proteins. In some species, sulfated mucopolysaccharides were also detected.抄録全体を表示PDF形式でダウンロード (2757K) -
マクサの窒素吸収を促進する燐の効果とそれらに及ぼす光の影響山田 信夫1964 年 30 巻 11 号 p. 908-911
発行日: 1964/11/25
公開日: 2008/02/29
ジャーナル フリーThe present paper deals with the studies carried out to find the effect of phosphorus on the absorption of nitrogen of an agar seaweed (Gelidium amansii) and the influence of light intensity on this effect, as a part of the writer’s studies on the manure for agar seaweeds.
The results obtained are summarized as follows:
1) The nitrogen absorption of the agar seaweed was promoted remarkably by the addition of phosphorus to the culture solution. The optimum ratio of nitrogen to phosphorus was 2:1 ?? 2:2 when the ammonium nitrogen content was 2-10 ppm.
2) There seems to exist a close relation between the nitrogen absorption of the seaweed and the light intensity. When the light intensity is higher than the compensation point of the seaweed, a considerable amount of nitrogen is absorbed. On the contrary, when the light intensity becomes below that point, the once absorbed nitrogen appears to be discharged into the medium.
3) From these results it can be suggested that a manure for agar seaweeds should contain a mixture of nitrogen and phosphorus and that the manuring should be done when the light intensity in the sea is higher than the compensation point of the aimed seaweed.抄録全体を表示PDF形式でダウンロード (245K) -
本間 義治1964 年 30 巻 11 号 p. 912-917
発行日: 1964/11/25
公開日: 2008/02/29
ジャーナル フリーThis paper deals with a morphological and histological description of the exencephalocele (Hernia cerebri) found in a juvenile salmonoid fish, the so-called Sirasu-larva of dwarf Koayu which is landlocked in Lake Biwa, the largest lake in Japan. The present report may be the first record of spontaneous hernia cerebri in the teleostean fishes.
A large quantity of a left half of optic lobe (mesencephalon) erupted through the defective portion, that is, the perforated left half of parietal bone, and formed a large swelling like a kind of sarcoma. As the swelling is not covered with skin and meninx, the protuberant part is in the naked state thoroughly. Accordingly, the arrangement and disposition of mesencephalon, particularly of cellular layer of optic tectum, granular and molecular layers of cerebellum, infundibulum and inferior lobe showed a remarkable bilateral asymmetry, however there have no detectable abnormality in the cerebrum (telencephalon) and olfactory lobe.
The pituitary gland is under the condition of severe deformity, and the picture of function of thyroid follicles is more active than that of normal ones.
A brief account of causality is given concerning the present peculiar specimen that has survived about two months after it was spawned.抄録全体を表示PDF形式でダウンロード (1177K) -
新間 弥一郎, 田口 脩子1964 年 30 巻 11 号 p. 918-925
発行日: 1964/11/25
公開日: 2008/02/29
ジャーナル フリーDifferences of lipids, especially fatty acid compositions between wild and cultivated sweet smelt were studied, since fundamental data concerning about lipids of the fish were not available, though production of the fed “Ayu” has been increasing year after year.
A group of infant fish was released to a stream (River Chikuma) middle of May-though it was a little later in season than an average year-1963, another group was cultivated at a fish pond in the area. After three months samples (Table 1) were caught and such several parts as dorsal muscle, sexual organs, liver, and fatty tissue of abdominal cavity were examined. Both groups showed almost same contents of lipids and cholesterol in tissue in spite of the big differences of their size and weight (Table 2).
Extracted lipids, except belly fat, were separated by Bloor's method into two fractions, phospholipids (PL) and other lipids (TG), and fatty acid composition of each fraction was analyzed on GLC (Figs. 1 and 2). The data described comparatively on Table 3 could be summerized as follows:
1) In dorsal muscle TG of the wild fish, a sum of C14 and C16 acids reached more than 50% of the composition, while the cultivated fish had the acids around 40%.
2) Belly fat showed much of difference from other parts being abundant in C16:1 acid but lacking in higher unsaturated acids. The wild group contained relatively higher amounts of C14:0, C16:1, and C18:4 acids in this fat, while the fed group showed more C16:0, C18:1, C18:2 acids. Comparison of other part TG between wild and cultivated groups gave similar results as shown in Fig. 3.
3) Sexual organs of the fed group seemed to stroe C22:6 acid which was probably traced to the diet given (Table 4). However, any particular effect of other fatty acids of the feed could not be observed in the fish lipids.
4) On the other hand PL fractions which, in general, were composed of less C14:0, C16:1, C18:1, and C18:3 acids, and more C22:6 acid than TG did not show much differences among their compositions, except milt of wild fish contained less amounts of C22:6 acid than other parts.抄録全体を表示PDF形式でダウンロード (511K) -
スズキ消化管内のキチン分解細菌数について奥谷 康一, 早崎 幸夫, 木俣 正夫1964 年 30 巻 11 号 p. 926-929
発行日: 1964/11/25
公開日: 2008/02/29
ジャーナル フリーAlthough many workers2)3)4)5) have detected chitin-decomposing bacteria in the digestive tract of certain animals, little information are found regard as its nutritional problem to the host.
SEKI and TAGA5) found a chitin-decomposing bacteria in the digestive tracts of octopus, spuid and swell-fish and suggested that this bacteria is not important with respect to the nutrition for these animals, because the amount of the products formed, due to chitin decomposition, which may be easily utilized by the host is very little. However, in spite of their suggestion, the importance of symbiotic bacteria aiding animals in the digestion of chitin should not be negligible.
In the previous paper2), by the present authors it was reported that the chitin-decomposing bacteria were present in the stomach of Japanese sea-bass, Lateolabrax japonicus. The present study was carried out in order to demonstrate the population of chitin-decompsing bacteria present in the digestive tract of this fish, and also the effects of some environmental conditions on the bacterial counts were ascertained.
Results obtained are as follows.
1) As the medium used for the counting of chitin-decomposing bacteria, there are few differences between the medium prepared with fresh water containing 2.5% NaCl and that with natural sea water (Table 1).
2) There are few differences between the result obtained by the liquid culture and that by the agar plate culture, when the dilution method is used for the counting of chitin-decomposing bacteria (Table 2).
3) When the chitin-decomposing bacteria present in digestive tract of Japanese sea-bass is counted using the medium adjusted pH 4.5 and pH 7.0, the results obtained are more larger in the latter case (Table 3).
4) A greater part of total bacterial cells present in the digestive tract of this fish is chitin-decomposing bacteria (Table 2 and Table 3).抄録全体を表示PDF形式でダウンロード (260K) -
鴻巣 章二, ムザッフェル オザイ, 橋本 芳郎1964 年 30 巻 11 号 p. 930-934
発行日: 1964/11/25
公開日: 2008/02/29
ジャーナル フリーFree amino acids in the muscle of the red sea bream, striped mullet and eel were analyzed by the ion exchange column chromatographic method. Except taurine, the amount of each amino acid was less than 15mg.% both in the red sea bream and eel, while fairly large quantities of histidine, lysine and glycine were found in the striped mullet. Taurine was one of the most abundant ninhydrin-positive constituents in the muscle extracts of red sea bream and striped mullet, occupying more than 70% of total free amino acids in the former and about 25% in the latter. In the muscle of eel, on the other hand, an extremely large amount of carnosine accounting for about half of the non-protein nitrogen was detected.抄録全体を表示PDF形式でダウンロード (282K) -
簗瀬 正明, 清水 泰幸, 東 秀雄1964 年 30 巻 11 号 p. 935-939
発行日: 1964/11/25
公開日: 2008/02/29
ジャーナル フリーVarious kinds of “Katsuwobushi” (dried Skipjack), a Japanese seasoning were analyzed for vitamins A, D, B1 and B2 by physicochemical method, and for B6, pantothenic acid (PaA), folic acid (FA) and B12 by microbiological method.
The results obtained are
(1) The samples of Katsuwobushi analyzed are poor in vitamins A and D but fairly rich in most of the B-vitamins (Table 1).
(2) There is no any definite correlation between kinds of Katsuwobushi and the content of B-vitamins (Table 2).
(3) The surface layer (1-2mm thick) of Katsuwobushi has B2, PaA and FA several times as much as the inner layer, suggesting that these vitamins are synthesized by mould in the moulding process (Tables 3 and 4).
(4) Most of the B-vitamins in Katsuwobushi are found easily extractable when the strips of Katsuwobushi are boiled with water (Table 5).抄録全体を表示PDF形式でダウンロード (333K) -
栗田 晋1964 年 30 巻 11 号 p. 940-943
発行日: 1964/11/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (319K)
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