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Volume 36, Issue 9
Displaying 1-17 of 17 articles from this issue
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Mikio OGURI, Mizuho OGAWA, Hirofumi SOKABE1970 Volume 36 Issue 9 Pages 881-884
Published: September 25, 1970
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSHistological examination was made to identify JG cells on the kidneys of eleven species of Chondrichthyes and two species of Cyclostomi. However, the JG cells could not be detected in them.View full abstractDownload PDF (599K) -
Keiji NASU, Saburo MACHIDA1970 Volume 36 Issue 9 Pages 885-888
Published: September 25, 1970
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSAccording to the data in the seasons of 1962/63 to 1965/66 at least, the main sei whaling grounds generally existed in the sea region between the Antarctic Convergence and the Subtropical Convergence.
It seems that when the Antarctic Convergence shifted further south than other seasons, the catch per unit effort of sei whale declined, and in the season of inverse phenomena; it increased.
Accordingly, if such a tendency is evident as a rule, the stock assessment based on the catch data must be corrected by the rate of exploitation caused by the latitudinal fluctuation of the Antarctic Convergence.View full abstractDownload PDF (226K) -
Comparative Investigation between Environmental Factors in the Ariake-sea and Those in Tokyo BayOsamu IMADA, Shin ANDO, Yuichi SAITO, Shigeru MAEKI, Tatsuya SEKI1970 Volume 36 Issue 9 Pages 889-905
Published: September 25, 1970
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSIn a previous paper the relationship between culture conditions and growth and injury of the leafy fronds of Porphyra was discussed. The present paper once again deals with culture conditions for the growth of Porphyra, but in order to make clear the differences between field locations and its influence on culture conditions, the study location was changed from the Ariake Sea to Tokyo Bay.
Observations and the measurements taken are almost same as those explained in the previous paper and these are as shown in Table 1 in the present paper. Tokyo Bay is located to the north of the Ariake Sea, about 250km, and culture in Tokyo Bay is generally begun about half a month earlier than in the Ariake Sea. But by checking the sea water temperature this difference is compensated. These results are shown in Fig. 3.
Changes in culture condition factors are very unique for pH and DO2, of sea water from the end of October to November. The changes of pH and DO2 of the sea water can be recognized from Porphyra fronds a vital function in the field. The changes are because of the fluidity of sea water in Tokyo Bay which is less than that in the Ariake Sea. Lightness and light intensity in Tokyo Bay is less than half of that in the Ariake Sea however, lower culture net heights make up for the deficit and thereby the growth rate of Porphyra fronds in Tokyo Bay is similar to that in the Ariake Sea.View full abstractDownload PDF (1441K) -
Yasuo SASAKAWA1970 Volume 36 Issue 9 Pages 906-913
Published: September 25, 1970
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSOn the West Kamchatka continental shelf, many female king crabs, Paralithodes camtschatica (TILESIUS), which were in the period of releasing prezoea larvae were caught even in areas over 15 miles away from the coast (Fig. 2).
However, zoea larvae and juveniles less than 52.4mm in carapace width were scarcely caught in this area (Fig. 4).
Conclusions of this study indicate that in the area over 15 miles away from the coast, south of about 57°30'N, female king crabs do not take part in the reproduction of the available stock and the effective intensity of their reproduction is none.View full abstractDownload PDF (502K) -
Total Uptake of Food and the Efficiency of Total Food ConversionYoichi YOSHIDA1970 Volume 36 Issue 9 Pages 914-916
Published: September 25, 1970
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSFollowing the formulae obtained in the previous paper1), the formulae to determine the total uptake of food, the efficiency of food conversion, and the efficiency of total food conversion were introduced and an attempt to apply these to the breeding data of the amber fish Seriola quinqueradiata obtained by HARADA3) has been made.
From the results of these attempts, it is ascertained that the formulae introduced are pretty well applicable to the data.View full abstractDownload PDF (174K) -
Effects of Temperature to the Coefficients β', β, and γYoichi YOSHIDA1970 Volume 36 Issue 9 Pages 917-920
Published: September 25, 1970
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESS1. The effects of temperature on the coefficients β', β, and γ were examined, by using the results obtained in the breeding experiments of the amber fish Seriola quinqueradiata and in field studies on the cod Gadus callarias.
2. Of the temperature quotient (Q10) of the coefficients, those β', β, and γ of the amber fish (16-26°C) were 2.9, 2.9 and 3.3, respectively, and those of β and γ of the cod (4-14°C) were comparatively high, 5.3 and 8.2, respectively. The value of W1/3max (or β/γ) was indicated reversely to decrease with the increase of temperature in both fishes.
3. The growth curves of the amber fish were estimated by using coefficients obtained and the effects of temperature and season on the growth were examined.View full abstractDownload PDF (237K) -
On the Nitrogen Metabolism in Porphyra Frond Tissue infected with White Wasting Disease likeTuyoshi WATANABE, Sakari KATO1970 Volume 36 Issue 9 Pages 921-925
Published: September 25, 1970
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSNitrogen metabolism in Porphyra tenera fronds infected with “shirogusare” (like a white wasting disease) was studied. The results obtained are as follows:
1) Infected tissue possessed altered nitrogen metabolism: the water-soluble nitrogen (principally non-protein nitrogen and ammonia) content increased, whereas the water-soluble protein content decreased.
2) The concentration of free amino acids was decreased in the infected tissues. Marked decrease was noted in glutamic acid, alanine and cystine.
3) Glutamic acid dehydrogenase (EC 1.4.1.2 L-Glutamate: NAD oxidoreductase) was present in Porphyra frond. The optimum pH was about 7.8 and the enzyme activity was found to be markedly reduced in the infected tissue. Excess amounts of ammonia found in the infected tissues could be explained on the basis of their having reduced activity of the enzymes such as glutamic acid dehydrogenase.
4) The acumulation of ammonia in the infected tissue apparently suppressed the oxygen uptake in the mitochondrial fraction. It appears likely that cellular metabolic activity of the infected tissue is reduced.
5) These results suggest that the disease process of “shirogusare” is accentuated further by the accumulation of excess amounts of ammonia produced in the tissue as a result of either increased catabolism of protein or reduced conversion of ammonia to amino acids, or both.View full abstractDownload PDF (556K) -
Yasuo ITAZAWA1970 Volume 36 Issue 9 Pages 926-931
Published: September 25, 1970
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESS1. Heart rate (beats/min.) determined from electrocardiogram recorded in conditions as near to natural as possible was 42-51 (the mean 46) in the rainbow trout, and 20-54 (the mean 32) in the eel.
2. Cardiac output (ml/kg, min.) estimated by FICK's principle was 16.0 in the rainbow trout, 20.7 in the carp, 18.8 in the eel, and 36.6 in Oplegnathus.
3. Mean total circulation time (min.) estimated from the cardiac output and the blood volume was 2.2 in the rainbow trout, 1.7 in the carp, 1.9 in the eel, and 1.0 in Oplegnathus.
4. Tissues of fish are considered to receive much smaller amount of blood in a given time compared with mammals.View full abstractDownload PDF (371K) -
Comparative Study of Carbonyls in Frozen and Salted Sea Urchin GonadsKatsutoshi MIWA1970 Volume 36 Issue 9 Pages 932-939
Published: September 25, 1970
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSCarbonyl compositions and contents of frozen sea urchin gonads of five species and salted Ezo-bafun uni, Strongylocentrotus intermedius, were examined.
The results are as follows;
1) Gas liquid chromatographic figures of carbonyls in frozen Ezo-bafun uni and those of salted Ezo-bafun uni were approximately the same, but their respective total monocarbonyl and oxo-acid contents were different.
Frozen Ezo-bafun uni contained a larger amount of monocarbonyls and the salted ones contained a larger amount of oxo-acids.
2) Acetaldehyde, propionaldehyde, acetone, iso-valeraldehyde or 3-methyl butylaidehyde, and small amounts of other monocarbonyls, were detected from either frozen or salted sea urchin gonads.
In addition, pyruvic acid, acetoacetic acid, α-keto n-butyric acid, α-keto iso-valeric acid, α-keto iso-caproic acid and α-keto 3-methyl valeric acid were found in the gonads.
3) The same monocarbonyls were identified from frozen Hokuyo-bafun uni, Strongyloeentrotus drøibachiensis, Bafun uni, Hemioentrotus pulcherrimus, Kitamurasaki uni, Strongylocentrotus nudus, and Murasaki uni, Anthocidaris orassispina.
4) The formation speed of carbonyls in sea urchin gonads during freezing storage was different by species. Sea urchin gonads containing more than 30mg% as a total carbonyl, had a heavily pungent taste.
Ezo-bafun uni, Hokuyo-bafun uni, Bafun uni, Kitamurasaki uni and Murasaki uni showed carbonyl formation speeds in the order given.View full abstractDownload PDF (452K) -
Shoji KONOSU, Yen-Nan CHEN, Katsuko WATANABE1970 Volume 36 Issue 9 Pages 940-944
Published: September 25, 1970
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSA new betaine, named atrinine was isolated from the adductor muscle of fan-mussel, Atrina pectinata japonica, and crystallized as its hydrochloride. From various analytical data, including the elementary composition, color reactions, proton resonance and infrared absorption spectra, atrinine hydrochloride was postulated to be trimethyl-(2-carboxy-3-hydroxypropyl)-ammonium chloride. The chloraurate and chloroplatinate of atrinine were also prepared from the hydrochloride.View full abstractDownload PDF (255K) -
Spectrophotometric Study of Blue MeatNorio INOUE, Terushige MOTOHIRO1970 Volume 36 Issue 9 Pages 945-948
Published: September 25, 1970
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe reflectance spectra of blue meat and haemocyanin-sulphide complex showed maxima at 550-570mμ and 530-550mμ respectively. A decrease of the percentage-reflectance is related to an increase of blueing. A linear relationship was found between the colour intensity and the content of copper combined with sulphide.View full abstractDownload PDF (205K) -
Feeding on Artificial DietAkio KANAZAWA, Makoto SHIMAYA, Mitsuyasu KAWASAKI, Ken-ichi KASHIWADA1970 Volume 36 Issue 9 Pages 949-954
Published: September 25, 1970
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSAn attempt to prepare the complete artificial diet for prawn, Penaeus japonicus, has been carried out.
The artificial diets consisting of purified soy-bean protein, glucose, sucrose, starch, glucosamine, chitin, cellulose powder, refined soy-bean oil, citric acid, succinic acid, amino acids, minerals, vitamins and cholesterol were eaten well by the prawn. In the prawn maintained on these artificial diets, no abnormal symptom appeared during the feeding period. Among the artificial diets used, test diet 4 exhibited the growth rate of 72% in comparison with the control as shown in Table 6.
In view of these results, it is suggested that this artificial diet is sufficient for the feeding trials as to the nutritional requirements of prawn.View full abstractDownload PDF (336K) -
Lipid MoietyKatsumi YAMAGUCHI, Kanehisa HASHIMOTO, Fumio MATSUURA1970 Volume 36 Issue 9 Pages 955-962
Published: September 25, 1970
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSLipid of biliverdin-lipoprotein in eel serum was fractionated into four fractions: Acetone-soluble, ether-soluble conjugated, ether-insoluble conjugated, and firmly combined lipid fractions. The acetone-soluble lipid fraction consisted of glycerides, free fatty acids, cholesterol esters, free cholesterol, with small amounts of alcohols and the other unsaponifiable matters. The main fatty acids in this fraction were 16:0 and 18:1 acids amounting to about 1/3 each of the total. Conjugated lipid fractions were composed of phosphatidylserine and a sort of phospholipid the nature of which remains to be clarified.
The proportions of lipid fractions in the biliverdin-lipoprotein fluctuated considerably, while the composition of each fraction was relatively fixed and characteristic. Therefore, if the biliverdin-lipoprotein takes part in lipid transport in living eel, the mechanism might be different from that of the lipoprotein in higher animals.View full abstractDownload PDF (459K) -
Hideaki MANITA, Chiaki KOIZUMI, Junsaku NONAKA1970 Volume 36 Issue 9 Pages 963-971
Published: September 25, 1970
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSGLC determination of free amino acids in fish flesh was investigated and the changes of the free amino acids during the aseptic autolysis of the mackerel muscle was studied.
By the autolysis Gly, Ala, Asp, Leu, and Glu were liberated faster and more, followed by Lys, Thr, Ileu, Phe, and Ser. Those Val, Pro, and Tyr were liberated slower and less. Free Hypro was, though its amount was a little, newly produced during the aseptic autolysis.
The present study was supported in part by research funds granted from the Ministry of Education to which the authors wish to express their thanks.View full abstractDownload PDF (503K) -
Takeshi WATANABE, Fumio TAKASHIMA, Chinkichi OGINO, Takashi HIBIYA1970 Volume 36 Issue 9 Pages 972-976
Published: September 25, 1970
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSDownload PDF (284K) -
Hitoshi UCHIYAMA, Shigeo EHIRA1970 Volume 36 Issue 9 Pages 977-992
Published: September 25, 1970
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSDownload PDF (1505K) -
1970 Volume 36 Issue 9 Pages e1
Published: 1970
Released on J-STAGE: April 22, 2008
JOURNAL FREE ACCESSDownload PDF (38K)
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