巻号一覧
38 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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仙台湾における母貝群の性状小金沢 昭光, 後藤 邦雄1972 年 38 巻 1 号 p. 1-8
発行日: 1972/01/25
公開日: 2008/02/29
ジャーナル フリーSendai Bay of northern Japan is one of the well-known sources of seed oysters for supplies to both foreign as well as domestic markets. Production of seed oysters are dependent upon meteorological, hydrographical and topographical features of the fishing grounds on the one hand and, on the other, upon ecological characteristics of the oyster population, such as the breeding of mother oysters and dispersal or accumulation of their larvae. In this paper, the authors report the role played by mother oyster populations in the production on seed oysters in this area.
Cultured oysters were sampled at Kobuchi in Ojika Peninsula, Mangoku-ura in Ishinomaki Bay and Tona in Matsushima Bay, all within the larger Sendai Bay area. Growth, sexual maturity and breeding season of the oysters and the amount of spawned eggs were determined both morphologically and histologically.
The oysters from the relatively oligotrophic waters of Mangoku-ura in Ishinomaki Bay and those from Kobuchi in Ojika Peninsula, where the effects of oceanic conditions are apparent, were characterized by smaller growth rates and lesser amounts of spawned eggs than the oysters from the more eutrophic Matsushima Bay. The Matsushima Bay group, together with the Mangoku-ura oysters, also showed an earlier incidence of spawning. Results of a survey on oyster larvae which was carried out in Sendai Bay during the period 1965-1968 strongly suggest that the Matsushima Bay population of mother oysters contribute to the larger part of the production of eggs and, through the larval stages, setting of oyster spats in Sendai Bay. Based on these results, the authors have discussed the possibility of improving seed collecting techniques, including the prediction of periods and areas of oyster spat setting in this Bay.抄録全体を表示PDF形式でダウンロード (543K) -
溶存酸素の水平分布と風によるMicrocystisの移動の関係山岸 宏, 青山 莞爾1972 年 38 巻 1 号 p. 9-16
発行日: 1972/01/25
公開日: 2008/02/29
ジャーナル フリーDuring the bloom season of Microcystis in Lake Suwa, the horizontal distribution of dissolved oxygen in surface waters was studied in relation to the drifting of the alga by winds. The studies demonstrated that dissolved oxygen in the lake increased from the windward to the leeward with concominant increases in the density of drifting Microcystis and pH values: oxygen was markedly undersaturated on the windward (less than 50% saturation), but extremely supersaturated on the leeward (more than 250% saturation). Cell numbers of Microcystis reached 2.8×108/ml at areas of highest density.抄録全体を表示PDF形式でダウンロード (492K) -
大牟田川の廃水および懸濁質の発癌性石尾 真弥, 河辺 克巳, 富山 哲夫1972 年 38 巻 1 号 p. 17-24
発行日: 1972/01/25
公開日: 2008/02/29
ジャーナル フリーIt was reported that a certain cancerous disease of Porphyra tenera was observed in the costal waters of Toko, Nagoya and Fukuyama. This disease was also heavily detected in the waters along the industrial city of Ohmuta. The outbreak of this algal cancer seemed to be always limited in the receiving waters of industrial waste water. From the viewpoint of the diversity of the carcinogenic compounds, and the variety of the pollutants in the waste, there should no doubt be a regional peculiarity in the causal substances of this disease in each of the coastal waters mentioned.
In this study, carcinogenic potencies were tested with the waste water taken during the ebb tide of the river Ohmuta, and also with mud deposited on the sea bottom, which was about 1.5km north from the mouth of this river. The tests revealed that the waste water showed poor carcinogenic effect when diluted to a concentration as low as that found in the areas under cultivation where this disease can be easily detected, but the mud induced clearly cancers on the leaves of this alga during a 36 day culture after a single contact for periods ranging from 80 to 320 minutes.
Therefore, it is concluded that the cancerous disease of Porphyra tenera should be attributable to suspended solids contained in the sea bottom mud which probably is derived from the Ohmuta river as evidenced from the distribution of nitrogeneous aromatic compounds in the bottom mud.抄録全体を表示PDF形式でダウンロード (534K) -
田中 昌一1972 年 38 巻 1 号 p. 25-28
発行日: 1972/01/25
公開日: 2008/02/29
ジャーナル フリーThe basic model for the number of tags N presented in the previous paper is modified, in order to take into account the fact that tags shed from seaweeds are not vulnerable to the fishery, and hence the coefficient of fishing κF can be applied only to retained tags NT, but not to the total tags N. The results from a modified model are compared with those from the previous one. It reveals that the results from the latter, which is very simple in expression, is a good approximation to that from the former and the error involved in the estimate of the coefficient of tag shedding M based on the previous model is thought to be negligible. This modification of the model does not affect the estimates of other parameters such as κF.抄録全体を表示PDF形式でダウンロード (161K) -
放流・再捕結果田中 昌一1972 年 38 巻 1 号 p. 29-32
発行日: 1972/01/25
公開日: 2008/02/29
ジャーナル フリーData from the tagging experiments of yellowtails, Seriola quinqueradiata, in 1963-65 were analysed to estimate the migration of the fish. Two dimensinal expression of the points of release and recapture of the tagged fish in time and space has been tried by approximating the Pacific coast line of Japan from Hokkaido to Kyushu by a curve and reducing the space into one dimension. The figures illustrated in this way indicate the followings: 1) The large sized fish (mostly adult) migrate southward in the Tohoku (north of Cape Nojima) and Tokai-Nankai (south of Cape Nojima) Regions in the winter-spring season and migrate northward in the summer-autumn season. 2) The small sized young fish show north-south migration within the Tohoku Region but present no evidence of movements within the Tokai-Nankai Region or between these two Regions. 3) The southward migration of the large sized fish in the Tokai-Nankai Region seemed to have occured about one moth earlier in 1964 than in 1965, suggesting a yearly variation in the timing of migration.抄録全体を表示PDF形式でダウンロード (296K) -
培養開始時間によるメダカの排卵率の違いについて広瀬 慶二, 広瀬 一美1972 年 38 巻 1 号 p. 33-42
発行日: 1972/01/25
公開日: 2008/02/29
ジャーナル フリーThis study was undertaken to determine the suitable starting hour of incubation and to accumulate some knowledge on time mapping during maturation and ovulation in Oryzias oocytes.
At 10.00 a.m. the oocytes in the largest group were undergoing yolk formation. Therefore, the high percentages of ovulation in vitro were not obtained in both the cases using the CO2 incubator and usual method. The addition of hormones at 5.00 p.m. showed the effectiveness for inducing ovulation, as described in the previous work. The oocytes at this hour did not have the first type of micropinocytotic vesicles which were observed in the oocytes under yolk formation as seen under the electron microscope. At 10.00 p.m. and 12.00 p.m., some oocytes, incubated in the medium without any hormone, ovulated naturally. But each experimental group did not show higher ovulation rate than that at 5.00 p.m.. A complex and better conditions in tissue culture may be required by the oocytes as they approach the time of ovulation. The time mapping during the changing processes of maturation and ovulation is discussed.抄録全体を表示PDF形式でダウンロード (1940K) -
血漿脂質におよぼす数種ホルモン物質の影響隆島 史夫, 日比谷 京, ファンバン ガン, 会田 勝美1972 年 38 巻 1 号 p. 43-49
発行日: 1972/01/25
公開日: 2008/02/29
ジャーナル フリーIn order to clarify the endocrine control over the egg yolk formation, the effects of estrogenic substance (diethylstilbestrol), androgenic substance (methyltestosterone), thyroid hormone (powdered mammalian thyroid gland), and adrenocorticotropin on plasma lipid and lipoprotein in rainbow trout were examined. Levels of total lipid and lipoprotein in plasma were raised by estrogen treatment. The liver of estrogen-treated fish was hypertrophic, and contained more lipid, protein and nucleic acids. It is concluded that the lipoporotein is synthesized in liver and released into the blood under the influence of ovarian steroid hormone. On the contrary, the levels of lipid and lipoprotein were reduced by thyroid powder administration. From these results it is suspected that an endocrine correlation mechanism affects the metabolism of lipoproteins that are deposited in the oocytes.抄録全体を表示PDF形式でダウンロード (444K) -
マダイ・チダイの細菌相におよぼす餌料成分の影響瀬良 洋, 木俣 正夫1972 年 38 巻 1 号 p. 50-55
発行日: 1972/01/25
公開日: 2008/02/29
ジャーナル フリーA comparison of the properties of the becterial flora present in the digestive tracts of fish, red sea bream snapper and crimson sea bream, which were fed with three different diets (F-, C- and S-diet), was carried out.
The results were summarized as follows:
(1) Although there was a little variation in the numbers of bacteria in the digestive contents among the three dietary groups of fish, in morphological and biochemical properties the bacteria isolated resembled one another in spite of difference of diet.
(2) The majority of strains isolated from environmental sea water were different from those isolated from fish in the abilities to produce indol and to hydrolyse starch and casein. A dominant group having a certain definite property was not found among the strains isolated from C-diet.
(3) The growth of bacteria isolated from fish was not affected by bile or low pH value, while that of bacteria isolated from sea water and diet was affected.
It is suggested that the flora in the digestive tract are limited to only a few bacterial groups, since the environmental conditions in the digestive tract are so severe as to exclude the great majority of exotic bacteria.抄録全体を表示PDF形式でダウンロード (370K) -
森 幹男, 引地 昭三, 神谷 久男, 橋本 芳郎1972 年 38 巻 1 号 p. 56-63
発行日: 1972/01/25
公開日: 2008/02/29
ジャーナル フリーTwo species of teleost fish, Cubiceps gracilis and Centrolophus sp., have been found to possess diacyl glyceryl ethers in the muscle as a major lipid, a condition previously reported only for Stromateus maculates. In these fishes, concentrations of the muscle lipids ranged from 15.2 to 21.0% and those of glyceryl ethers in the muscle lipids from 20.3 to 27.7%. Compositions of glyceryl ethers and total fatty acids were analyzed by gas-liquid chromatography. Chimyl and selachyl alcohols were the major constituents and made up together 74-84% of the glyceryl ethers. The component fatty alcohols detected were of 9-20 carbon atoms and most of them were saturated or monoenoic. Most of the fatty acids were similarly saturated or monoenoic, oleic acid being the main component.抄録全体を表示PDF形式でダウンロード (1131K) -
斃死魚から分離した病原菌の性状および薬剤に対する感受性平野 克巳, 米 康夫1972 年 38 巻 1 号 p. 64-68
発行日: 1972/01/25
公開日: 2008/02/29
ジャーナル フリーIn the previous study, numerous organisms were isolated from livers of red sea bream, Chrysophrys major, fingerlings which had died during culture after transportation, and the isolates were classified into thirteen groups on the basis of certain characteristics. The bacteria belonging to groups V and X showed pathogenicity in fish. In the following study, the bacteria belonging to group V were identified as Vibrio anguillarum-like bacterium K-3, based on their morphological and biochemical characteristics.
The present paper deals with the characteristics and the sensitivity to bacteriostats of the bacteria in group X.
The results obtained can be summarized as follows:
1. The bacteria are evidently Vibrio species, according to the presumptive identification of pathogens of fish by BULLOCK.
2. The morphological and biochemical characteristics of bacteria resemble those of V. anguillarum type B introduced by NYBELIN, excepting one characteristic, namely, the non-liquefaction of gelatin. The bacteria also resemble V. pierantonii in terms of some characteristics, especially the non-liquefaction of gelatin and the non-production of indole.
3. The bacteria grew well in the nutrient broth containing 1 to 5% sodium chloride. The optimal growth in a medium with a 3% NaC1 level was observed in the temperature range of 20 to 35°C and in the pH range of 5 to 9.
4. The bacteria are most sensitive to chloramphenicol among all the drugs used.抄録全体を表示PDF形式でダウンロード (280K) -
アニサキス第III期幼虫の遊離および結合アミノ酸組成について大石 圭一, 岡 重美, 平沖 道治1972 年 38 巻 1 号 p. 69-72
発行日: 1972/01/25
公開日: 2008/02/29
ジャーナル フリーAnisakiasis is said to be caused by ingestion of the excreta or body constituents of Anisakis larva. To study the chemical composition of these materials, the determination of amino acid composition was carried out.
The worms werg collected from Alaska pollack caught in the Okhotsk Sea and in the Pacific Ocean. The worms were washed with physiological saline, then extracted with 70% ethanol.
The residue was hydrolyzed with 6 N HC1 at 110°C for 20hrs. The determinative results with a liquid chromatography make clear the following points.
Obvious differences were found between the two extractives from Okhotsk and Pacific worms as follows: in the former, large quantities of glutamic acid and alanine were found, while in the latter, the content of alanine was found to be highest. Approximately the same results were obtained from both hydrolysates, both of which contains 17 kinds of amino acids. No special ninhydrin positive substances were found. The worms collected from Alaska pollack contained 3 or 6 times the aspartic acid and glutamic acid content of worms from mackerel, but relatively lesser amounts of tyrosine, histidine and arginine.抄録全体を表示PDF形式でダウンロード (227K) -
コイ筋肉ミオシン,アクトミオシンの希釈沈殿法による精製高士 令二1972 年 38 巻 1 号 p. 73-78
発行日: 1972/01/25
公開日: 2008/02/29
ジャーナル フリーIt has been believed that the tendency of fish myosin to denature is much greater than that of rabbit during repeated precipitation by dilution.
An investigation was made to purify carp myosin and actomyosin by the usual dilution method. The preparations obtained at each step of precipitation were characterized by measuring ATP-ase activity, ATP-sensitivity, and activities of other contaminating enzymes (myokinase and adenylic deaminase).
Crude myosin usually had ATP-sensitivity of 5-20. Some which had slightly higher values were improved by an intermediate precipitation at a KCl concentration of 0.28 mole/l.
The crude preparations of myosin and actomyosin usually contained myokinase and adenylic deaminase. The repeated precipitation resulted in virtually complete removal of myokinase but not of adenylic deaminase.
It was observed that specific ATP-ase activity of myosin preparations decreased slightly during repeated precipitation by dilution, while those of actomyosin preparations remained almost constant.
The above results suggest that myosin denaturates slightly during repeated precipitation by dilution.抄録全体を表示PDF形式でダウンロード (370K) -
ハルバー Ｊ．Ｅ．1972 年 38 巻 1 号 p. 79-92
発行日: 1972/01/25
公開日: 2008/02/29
ジャーナル フリーSalmon, trout, char, carp, aquarium fish and probably many more kinds of fishes develop specific avitaminosis C symptoms when denied dietary sources of ascorbic acid. Clinical aspects of this deficiency disease are dramatic attesting to the essential function of this diet ingredient in normal processes. Subclinical manifestations of the disease may play even more important roles in resistance to bacterial or viral infection, and certainly adequate ascorbate circulating and tissue storage levels would be critical deter-minants for repair of those tissues damaged by parasitic invasion or physical contusions.抄録全体を表示PDF形式でダウンロード (1994K)
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