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33 巻, 4 号
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鄭 文基, 金 善昴1967 年 33 巻 4 号 p. 285-294
発行日: 1967/04/25
公開日: 2008/02/29
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九州北部において1965年前半期にみられた魚類多部田 修, 塚原 博1967 年 33 巻 4 号 p. 295-302
発行日: 1967/04/25
公開日: 2008/02/29
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ニッコウイワナの下垂体血管系と神経分泌系本間 義治, 田村 栄光1967 年 33 巻 4 号 p. 303-310
発行日: 1967/04/25
公開日: 2008/02/29
ジャーナル フリーThe vascular supply to the hypothalamo-hypophysial region of the Japanese char, the Nikko-iwana, Salvelinus leucomaenis pluvius, was examined histologically after vascular injection with Chinese ink. In the present species, neither a true hypophysial portal vessel system which connects the hypothalamus with the pars distalis nor a portal system-like structure between neurohypophysis and adenohypophysis. The branches of the anterior cerebral arteries from the internal carotid artery supply the blood to the hypothalamic region, and the branches from the posterior cerebral arteries which direct anterolaterally provide the blood for the hypophysial region. Two main hypophysial arterial systems are detected, since the posterior cerebral artery divides itself into an anterior vascular plexus and posterior fine branches after pass through the pituitary stalk. The anterior vascular plexus forms the blood sinuses and projects into the region of adenohypophysis, and the latter invades deeply into the neurohypophysial digits. CH- or AF-positive neurosecretory granules from the nucleus preopticus concentrate on the wall of veins found in the digits of the pars nervosa. On the other hand, acid fuchsin positive neurosecretory axons from the nucleus lateralis tuberis are distributed chiefly around vascular plexus located near pars distalis. Accordingly, a possible role for this vascular plexus which is analogous to that of the hypothalamic portal vessel system and the gonadotropic activity of the hypophysis is intimated.抄録全体を表示PDF形式でダウンロード (1955K) -
シアンによる斃死狩谷 貞二, 秋場 玲子, 鈴木 修子, 津田 勉1967 年 33 巻 4 号 p. 311-314
発行日: 1967/04/25
公開日: 2008/02/29
ジャーナル フリーThe toxic effects of potassium cyanide on aquatic organisms have been reported by some workers. However there is apparently no published report on the lethal dose of cyanide in fish.
When the fish was maintained in the water containing cyanide, it was found that the concentration of cyanide decreased remarkably. It is probably due to some removal into the fish and volatilizing by fish-respiration and movement.
In this study, an attempt was determined by the Pirizin-Pirazoron method.
Cyanide was found in fish killed in lethal concentration. It was also possible to detect cyanide even after washing with tap water for 48 hours after death. In untreated control fish cyanide could not be detected.
It was concluded that this method can be used as one of methods for post-mortem identification of the pollutant in the fish killed by water pollution.抄録全体を表示PDF形式でダウンロード (249K) -
胃内容物組成について安田 徹1967 年 33 巻 4 号 p. 315-319
発行日: 1967/04/25
公開日: 2008/02/29
ジャーナル フリーIn recent years, several investigations on Chionoecetes opilio elongatus RATHBUN, one of the most important crabs in the deep waters of the Japan Sea, were carried out with a view to keep its resources, but comparatively little is known of its feeding habits. This paper is a record of observations made on the stomach contents of Chionoecetes collected by trawl-net during the period from September, 1964 to June, 1965 in Wakasa Bay of the southern Japan Sea (Fig. 1). About 1, 500 specimens were examined under microscope, frequently comparing with the residues (skeletons, spicules, shell fragments, etc.) obtained by boiling 10-20% KOH or NaOH solution, various known benthonic animals that were collected from the same fishing grounds. The results are summarized as follows:
1) More than 30 species of benthonic animals belonging to 6 phyla, and 3 species of phytoplankters belonging to 1 phylum were found in the digestive organ of the crab (Table 1).
2) The bulk of the stomach contents was composed of Echinodermata (especially, Ophiuroidea), Crustacea (Decapoda and Amphipoda) and Bivalvia, while fish scales and skeletons, Cephalopoda, Gastropoda, Scaphopoda and Polychaeta were found less frequently.
3) Small planktonic Copepoda, Cirriped larvae, Foraminifera, Diatomacea were also found, but these were considered as having been ingested incidentally.
4) From the facts mentioned above, it seems that Chionoecetes is a feeder upon benthonic animals of quite various kinds, occasionally it may even be necrophagous.抄録全体を表示PDF形式でダウンロード (341K) -
餌料供給源としてのシイラ漬木児島 俊平1967 年 33 巻 4 号 p. 320-324
発行日: 1967/04/25
公開日: 2008/02/29
ジャーナル フリーTo secure the role of food organisms in alluring dolphin and other fishes toward ‘Tsukegi’, the author examined the epifauna on ‘Tsukegi’ and stomach contents of fishes accompanying it. The results obtained are follows:
1) Thirty five species of animals covering seven phyla were found on ‘Tsukegi’ and its anchor rope (Table 1).
2) Fishes under ‘Tsukegi’ were devided into following four groups according to their feeding habits: Group I, feed on fishes and squid; group II, mainly feed on Cirripedia and Amphipoda; group III, mainly feed on Cirripedia and jelly fish; group IV, feed on small zooplankton (Table 2). It is only the fishes in groups II and III which feed on epifauna on ‘Tsukegi’, and dolphin belongs to group I.
3) It was found that dolphins and other fishes in group I never take those fishes belonging to groups II-IV. They take only freely swimming small sized fishes such as sardine, flying fish and squid or juvenile fishes accompanying floating seaweeds.
So far as feeding habits are concerned, dolphins and other fishes in group I seem to have no direct connection with ‘Tsukegi’. These fishes are considered to be allured toward ‘Tsukegi‚ by factors other than food.抄録全体を表示PDF形式でダウンロード (335K) -
垂直移動・水中照度およびプランクトン量などについて鈴木 垣由, 伊藤 準1967 年 33 巻 4 号 p. 325-337
発行日: 1967/04/25
公開日: 2008/02/29
ジャーナル フリーIt is said that deep scattering layer (DSL) in the sea is caused by the reflection of sonic waves propagated into the sea from pycnocline or layers of small organisms.
This study deals with the topics mentioned in the title as a step in the study of ecology of salmon in the high-sea region of the northern North Pacific.
The observations were carried out on board the Hokkomaru, research boat of Fisheries Agency, Ministry of Agriculture, in the northwestern area of the North Pacific during the period from July 11 to Aug. 5, 1964. Two kinds of ultrasonic finders, 200 KC and 28 KC respectivety, were used by attaching them outside the hull of the ship.
The results of the observations are summarized as follow:
1) It was overcast throughout the period of observations. The daylight intensity at the sea surface averaged (4-6)×102 lux at the time of sunrise as well as at sunset, while it was (8-10)×104 lux at noon.
2) The transparency of water was 15m. The depth at which the submarine illumination was as much as one lux corresponded to 62-64m at the time of sunrise and sunset and 123-125m at noon.
3) One or two layers of DSL were usually observed. These layers (1st and 2nd layers) changed their depth diurnally. Somtimes a third layer was found, but it did not shift vertically.
4) When two ultrasonic finders were operated at the same time, both the 1st and 2nd layers of DSL were recorded by the 200 KC finder. While only the 1st one was recorded by the 28 KC finder.
5) In order to observe difference in reflection loss of 200 KC and 28 KC sonic waves with the form of plankters, a test was made using a water tank. It was found that difference in reflection loss of Euphausia pacifica between 200 KC and 28 KC was ca. 5 db, and that of copepods such as Calanus plumchrus and Calanus cristatus was ca. 10 db. Such a difference may have been caused by difference in the size of organisms. The specific gravity of Euphausia pacifica, Calanus plumchrus, Calanus cristaus and Themisto sp. is almost same, i. e. ca. 1.06.
6) Organisms collected from the 1st-3rd layers of DSL by horizontal towing of a plankton net, 60cm diameter, 32 mesh/inch, mesh opening 0.53mm, were mainly euphausiids, copepods, amphipods, etc.抄録全体を表示PDF形式でダウンロード (2148K) -
久保田 穣, 木村 茂1967 年 33 巻 4 号 p. 338-342
発行日: 1967/04/25
公開日: 2008/02/29
ジャーナル フリー1. The acid soluble collagen preparation from the skin of great blue shark was characterized with regard to the physicochemical properties and the amino acid composition. The results obtained indicate that the skin collagen of great blue shark, one of lower classes of vertebrates, is similar to those from higher vertebrates in some physicochemical properties, while there is a little difference in the amino acid composition.
2. The high solubility in dilute acid and the low content of cross-links are the most characteristic natures of the skin collagen from great blue shark.
The authors wish to thank Dr. M. SUYAMA, Ass. Prof. of Tokyo University of Fisheries for the amino acid analysis and Mr. K. KANNA, Research Member of Tokai Reginonal Fisheries Research Laboratory for the ultracentrifugal analysis.
This work was supported in part by a grant for scientific research from the Ministry of Education in Japan.抄録全体を表示PDF形式でダウンロード (934K) -
海洋性亜硝酸生成細菌によるアンモニアの定量法吉田 陽一1967 年 33 巻 4 号 p. 343-347
発行日: 1967/04/25
公開日: 2008/02/29
ジャーナル フリーOn the microquantitative determination of ammonia present in sea water, the study was carried out, the marine nitrite former A 6 being used. The results obtained are as follows:
1. Five mililiters of the sample in which particulate matters such as bacteria have been eliminated by means of centrifugation and 0.5ml of cell suspension (0. D.=0.5) of the bacterium A 6 are mixed in the test tube. The mixture being incubated for 2 hrs at 30°C, the cells in it are eliminated by means of centrifugation and the nitrite concentration in the supernatant fluid is measured according to the ordinary method using Griess and Romjns reagent.
2. Ammonia present in sea water can be determined by this method, even in low concentrations such as 0.1-10 N μg at. /1.抄録全体を表示PDF形式でダウンロード (340K) -
海洋性硝酸還元細菌による硝酸の定量法吉田 陽一1967 年 33 巻 4 号 p. 348-350
発行日: 1967/04/25
公開日: 2008/02/29
ジャーナル フリーA study was carried out on the microquantitative determination of nitrates present in sea water, the marine nitrate reducer AH 1 being used.
1. Five mililiters of the sample in which the particulate matters such as bacteria have been eliminated by means of centrifugation, 0.5 ml of cell suspension (O. D.=1.0) of the bacterium AH 1 and 0.2 ml of 1% Na-acetate solution are mixed in the plastic centrifuge tube. The mixture is incubated for 90min. at 30°C, the cells in it is eliminated by means of centrifugation, and the nitrite concentration of the supernatant fluid is measured according to the ordinary method.
2. Nitrates present in sea water can be determined by this method, even in low concentrations such as 0.1-10 N μg at. /1.抄録全体を表示PDF形式でダウンロード (212K) -
リボフラビンおよびパントテン酸荻野 珍吉1967 年 33 巻 4 号 p. 351-354
発行日: 1967/04/25
公開日: 2008/02/29
ジャーナル フリーThe feeding trials have been conducted to study the requirements and deficiency symptoms of young carp for riboflavin and pantothenic acid. The synthetic diet of HALVER et al.2) in which the levels of the test vitamins were varied respectively was used throughout the experi-ments (Tables 1 and 3). The general feeding technique was reported in the previous paper1) . The growth responses of the carp to dietary levels of riboflavin or pantotheni ?? acid and accumulation of these vitamins in hepatopancreas were employed as criteria for the nutritional adequacy. The requirements for riboflavin and calcium pantothenate of the carp thus determined by 6-week feeding trials were 0.23-0.33mg and 1.0 1.4 mg per kg of body weight per day respectively under the experimental conditions used (Tables 1 and 3 and Figs. 1 and 2). The symptoms of carp due to deficiency of these two vitamins are indicated in Table 2. The most prominent pathological findings observed were hemorrhage in various areas of the body in riboflavin deficiency and extremely poor weight gain in pantothenic acid deficiency.抄録全体を表示PDF形式でダウンロード (270K) -
ビタミンB2について青江 弘, 増田 績, 斎藤 孝士, 江面 敦子1967 年 33 巻 4 号 p. 355-360
発行日: 1967/04/25
公開日: 2008/02/29
ジャーナル フリー1. The deficiency symptoms and requirement of vitamin B2 of young carp have been studied, using the basal diet devised by HALVER et al.
2. The deficiency symptoms were characterized by anorexia, poor growth, high mortality, hemorrhages in both epidermis and hepatopancreas. These symptoms were alleviated by administration of vitamin B2.
3. Under the experimental conditions adopted, the requirement of young carp was found to be 0.11mg per kg of body weight per day (0.40mg per 100g, of diet) on the basis of body weight gain, and 0.17mg per kg of body weight per day (0.62mg per 100g of diet) on the basis of storage levels of vitamin B2 in the hepatopancreas.抄録全体を表示PDF形式でダウンロード (1366K) -
アサクサノリ中の有効成分の分別 (2)阿部 重信, 金田 尚志1967 年 33 巻 4 号 p. 361-366
発行日: 1967/04/25
公開日: 2008/02/29
ジャーナル フリーIn a previous paper1) the authors reported that the ether-soluble lipids and water-soluble fraction separated from dried purple laver were effective for reducing plasma cholesterol levels in rats.
The authors carried out the fractionation of purple laver, Porphyra tenera, using different concentrations of ethanol (Fig. 1) or ion exchange resin (Fig. 2). After feeding experiments the results indicated that absolute ethanol and 80% ethanol-soluble fractions from water-soluble substances were effective (Table 4). The fraction adsorbed by Amberlite IR-120 effectively lowered plasma cholesterol, whereas the effluent fraction did not show any effects (Table 5). Several qualitative tests suggested that stachydrine contained in purple laver is one of effective substances.抄録全体を表示PDF形式でダウンロード (317K) -
亜硝酸生成細菌の亜硝酸化成作用について (2)吉田 陽一, 河合 章, 木俣 正夫1967 年 33 巻 4 号 p. 367-371
発行日: 1967/04/25
公開日: 2008/02/29
ジャーナル フリーOf 4 strains of almost pure cultures of the marine nitrite formers (A6, S1, M2 and SW1), effects of salts on the nitrite formation were examined using the resting cells (adhering to the sand). The results obtained are as follows:
1. The optimum concentrations of sea water on the nitrite formation of the bacteria SW 1, S 1, A 6, and M 2 are about 40-50%, 50%, 60-80%, and 100%, respectively, and those of NaCl are about 0‰, 13‰, 25‰, and 30‰, respectively, and also the activities of these bacteria reduce markedly at a low concentration of salts except for the bacterium SW 1.
2. The nitrite formation of the bacterium A 6 is stimulated by Na+ and K+ but inhibited by Ca++ and Mg++. On the contrary, that of the bacterium SW 1 is stimulated by Ca++, Mg++, and K+ but inhibited by Na+. Further, the inhibition of Na+ on the formation of SW 1 disappears by adding Ca++ but that of Ca++ on the formation of A 6 does by adding the same rates of salts with those in the artificial sea water.抄録全体を表示PDF形式でダウンロード (308K) -
鈴木 秋果1967 年 33 巻 4 号 p. 372-381
発行日: 1967/04/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (702K)
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