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Volume 33, Issue 3
Displaying 1-19 of 19 articles from this issue
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On the Cause of Annual Variation of Catch of Yellowfin Tuan in the Tropical Western Indian Ocean-IIIRealtion between Annual Variation of Hook Rate and Age GroupJun NAKAGOME, Eiji HANAMOTO1967 Volume 33 Issue 3 Pages 151-155
Published: 1967
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSOn the basis of the weight frequency distribution, the authors estimated the age composition of yellowfin tuna which were caught in the tropical western Indian Ocean during the period from 1958 through 1964 and also examined the relation between age composition and hook rate (number of fish caught per 100 hooks). The results obtained are summarized as follows.
The high hook rate seemed to be brought by the occurrence of dominant year class and or by the appearance of the simultaneous appearance of two or more age groups in the fishing ground.View full abstractDownload PDF (315K) -
Relation between Abundance of Year Class and Surface Water Temperature in Spawing and Nursery AreaJun NAKAGOME1967 Volume 33 Issue 3 Pages 156-160
Published: 1967
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe author studied the relation between abundance of year class of yellowfin tuna and surface water temperature in the tropical western Indian Ocean, and obtained following results:
1) The 1956 year class at both three and four years old were more abundant than the mean from 1955 to 1964 and the surface water temperature of the year in which the year class was born, was the lowest among those several years. The 1957 and 1958 year classes were less abundant than the mean and the surface water temperature in these years were higher than the mean among those several years.
2) There was no relation between the occurrence of the dominant year class and the degree of difference in surface water temperature between high and low temperature season in a year, and between low temperature season and high temperature season of next year.View full abstractDownload PDF (349K) -
Mikio OGURI, Naoko TAKADA1967 Volume 33 Issue 3 Pages 161-166
Published: 1967
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSUsing 294 goldfish, serum calcium and magnesium in various degree of gonadal maturation and effect of estradiol on serum calcium and magnesium were investigated, and the following results were obtained.
1. Conspicuous elevation of total calcium level was observed in the serum of goldfish injected with estradiol. The elevation of total magnesium level was detected also in the serum of these fish.
2. Relationship was observed between the total calcium level in blood serum and ovarian maturation of goldfish. Matured female goldfish showed hypercalcemia. On the contrary, no distinctive relationship was observed between the calcium level in the serum of male goldfish and testicular maturation. Total calcium in the serum of male goldfish was 3.17±0.12 mEq/L on the average.
3. Total serum magnesium of male and female goldfish was 1.63±0.12 and 1.50 ±0.07 mEq/L on the average, respectively.View full abstractDownload PDF (290K) -
Masako SATOMI, Seiichi MATSUI, Minoru KATADA1967 Volume 33 Issue 3 Pages 167-175
Published: 1967
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSChanges in the factors controlling the growth of the Porphyra community such as photosynthesis, respiration, and the increment in stock with the progress of the culture season were investigated under natural conditions in order to elucidate the characteristics of growth of the community in the culture ground.
Net production of the Porphyra community was calculated by subtracting the respiratory loss from the total gain by photosynthesis, and was compared with the increment in stock actually observed in the culture ground. Calculated net production coincided fairly well with the observed increment in stock in earlier period of algal growth. However, in later period the remarkable discrepancy was found between the calculated net production and the observed increment in stock. This suggests that a great part of net production was lost from the community.
Gross and net primary production of the Porphyra community was estimated on net area basis (Table 2). The daily increment in stock was 2.3g dry weight/m2 net area/day for the average throughout the investigated period of two months. The observed maximum standing crop was 140g dry weight/m2 net area. In the present culture ground the total amount of losses during these two months was estimated to be more than twice as much as the maximum standing crop observed.View full abstractDownload PDF (532K) -
Hiroshi MAÉDA, Shiro MINAMI1967 Volume 33 Issue 3 Pages 176-180
Published: 1967
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe daily reports by 22 Danish seiners of the fish-meal fleet in the Bering Sea during the entire season of 1963 showed that the boats varied greatly with respect to both the average of daily catch yielded and the average of the number of daily hauls conducted. And the catcher list added such information that they also varied greatly with respect to both the principal particulars and the attached instruments. The probable relation of the daily catch or the daily hauls to either of these characters was examined. And the following results are obtained:
1. The boats with more powerful engines were inclined to yield better catches.
2. Four of the boats, which fished from different port and were equipped with different type of echo-sounder, yielded poorer catch than the others, although they did similar amount of work.
3. They were less powerful in the main engine than the other boats. It is, therefore, hard to tell whether the difference of the boat in the type of echo-sounder and in the home port directly resulted in the difference of the catch or was effective indirectly through the difference of the home port in the common views on the desirable power of the main engine of the boat.View full abstractDownload PDF (272K) -
Yasuo INUI, Syuzo EGUSA1967 Volume 33 Issue 3 Pages 181-189
Published: 1967
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSWhen glass eels are subjected in a resting state to starvation from a half to 2 months empty spaces inevitably appear in their liver cells and at the same time glycogen accumulates in abundance in them. While they are fed daily fat globules appear in considerable amount but the glycogen and empty spaces in the liver cells showed no marked change in amount. Accordingly, these empty spaces are thought to represent the sites of glycogen storage.
The formation of empty spaces, that is, deposition of glycogen after a certain period of starvation is thougt to be a natural phenomenon due to a specific metabolism during starvation. The deposition of glycogen is probably related with glyconeogenesis and/or convertion of glycogen in the liver into blood glucose.
Empty spaces which are formed by a moderate starvation disappear after long periods of starvation.View full abstractDownload PDF (642K) -
Discoloration of the Film-packed “Sakura-dembu” Stored at Room TemperatureWataru WATANABE, Akira KOBAYASHI, Toshiaki HISASUE, Hiroshi KAWAKITA1967 Volume 33 Issue 3 Pages 190-194
Published: 1967
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSIn the preceding report, the authors described the discoloration of the film-packed “sakura-dembu” by irradiation with ultraviolet ray for one hour, and discussed the possible main causes of the phenomenon.
In this report, the authors observed the discoloration of the filmpacked “sakura-dembu” which have been storaged at room temperature under natural conditions for one month and compared it with that irradiated with ultraviolet ray using a fade-meter. The discoloration caused under the natural conditions was similar to that caused by irradiation.
However, the discoloration of the samples packed with three kinds of packing films, having different permeabilities against oxygen and ultraviolet rays was nearly similar to ond another after storage for one month. No protective effect was found with the films treated to prevent solar ultraviolet ray.
The strongest discoloration was found with the samples colored with Red 104 and the next those with Red 103. Only a slight discoloration was observed with those colored with Red 106 or with Yellow 4.
The samples colored with a single dye underwent discoloration only when stored under natural conditions. Only a slight discolorations was observed when stored at either room temperature or at refrigeration temperature and protected from light.
Less discoloration was observed with the samples containing 10% moisture than those with 15%, after storage under the same natural conditions for one month.View full abstractDownload PDF (338K) -
Salmonoid FishesHideaki YAMANAKA, Katsumi YAMAGUCHI, Kanehisa HASHIMOTO, Fumio MATSUUR ...1967 Volume 33 Issue 3 Pages 195-203
Published: 1967
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSStarch-gel electrophoretic analysis was carried out on Hb's from 12 species of salmonoid fishes.
The Hb patterns were independent of sex or of the place of catch. There was some dependence on age. On the whole, the salmonoid Hb's showed many more components (8 ?? 14), compared to other kinds of fish examined so far. In spite of some common features, the salmonid Hb patterns were all species-specific, allowing one to be distinguished from the other.
Three species of Salvelinus fish, brook trout, “amemasu”, and Dolly Varden, showed fairly similar Hb patterns, while rainbow and brown trouts, both from Salmo, showed patterns fairly different from each other. In Oncorhynchus, remarkable resemblance was noted in Hb pattern between chum salmon and “himemasu” and between “sakuramasu” and “biwamasu”, whereas pink salmon Hb was somewhat unique. “Yamame” and “hommasu” had almost the same pattern as “sakuramasu”. Hybrid individuals (F1) between chum salmon and “himemasu” showed Hb patterns, comparable to the parental ones, or having one or two additional bands.View full abstractDownload PDF (1097K) -
Takashi NAKAMURA, Masamichi TOYOMIZU1967 Volume 33 Issue 3 Pages 204-209
Published: 1967
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe separation of viscera lipids of fin whale, Balaenoptera physalus, was made by column chromatography with activated silicic acid. The chromatography was carried out by the use of solvent system I (Table 1), and the chromatogram is shown in Fig. 1. The lipid components were analyzed by chemical tests, infrared absorpion spectroscopic method, and thin layer chromatography (Figs. 2 and 3). The composition of the viscera lipids was the following: cholesterol ester and etc. 0.3%, triglyceride 82.5%, free fatty acid 4.2%, cholesterol 1.7%, diglyceride 4.5%, monoglyceride 3.7%, and polar lipids 3.1% (Table 2). The chromatogram was highly reproducible and the recovery was almost quantitative.
For the polar lipids, eluted with methanol after the neutral lipids, rechromatography was carried out by the use of solvent system II (Table 1), and the chromatogram is shown in Fig. 4. The polar lipids were extremely complicated. From the quantitative analysis of phosphorous, it was expected that phospholipid contents were 4.7 per cents of the polar lipids, but any of phospholipids were not identified. Judging from the results obtained by infrared absorption spectroscopic method and thin layer chromatography, oxidized glycerides were eluted in overall the fractions of methanol in chloroform (Figs. 5 and 6).View full abstractDownload PDF (1160K) -
On the Solubilization of the Dolphin Insoluble Hide CollagenMinoru KUBOTA, Hideo TAJIMA1967 Volume 33 Issue 3 Pages 210-216
Published: 1967
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSFor the purification of the dolphin collagen the fiber formation processing after the solubilization of pretreated dolphin hide was applied. First, the effect of the pretreatment on the component of the dolphin hide and some methods of the solubilization were examined.
The dolphin hide was pretreated with acetone and ethyl ether, then 0.5M sodium acetate and 0.1%, acetic acid. From the analyses of amino acids (Hypro, Pro, Tyr, Try), sugars (hexose and pentose) and amino sugar (hexosamine), the dolphin hide seemed to be considerably purified by the pretreatment (Table 1).
The amount of acid soluble collagen extracted by citrate buffer (pH 3.6) was as low as 0.1%.
It was confirmed to be better to solubilize the dolphin hide with the treatment of pepsin (crystallized twice-PU 366000) than with that of the Hiirotake enzyme product (PU 16600) after pretreating under the following condition as a method of the solubilization; Preheating treatment was done at 70°C, for 10min. After preheating, the dolphin hide was cooled slowly to room temperature for 2-3hr. Pepsin treatment was done with 1%, pepsin on dried hide weight at pH 1.5 (HCl-CH3COONa buffer), and 25°C.View full abstractDownload PDF (481K) -
On some Physicochemical Properties of the Pepsin Solubilized Collagen of the Dolphin HideMinoru KUBOTA, Shigeru KIMURA, Hideo TAJIMA1967 Volume 33 Issue 3 Pages 217-223
Published: 1967
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe study was carried out to elucidate the chemical composition and physicochemical properties of the hide collagen of the dolphin (Tursiops truncatus). By the electron micrograph, the macrostructure of the fiber was found to be constructed of the net work resembling to that of the cattle hide.
The hide was solubilized by pepsin treatment at 25°C in the buffer of pH 1.5 after the pretreatment such as degreasing (ether and acetone), extracting (0.5M Na-acetate and 0.1% acetic acid) and heat denaturation (at 70°C, 10min. in water). The pepsin solubilized collagen (PSC) was reconstituted by dialysing against 0.02M Na2HPO4. The PSC purified thrice by such method as solubilization and reconstitution was analyzed regarding amino acids, sugars, and amino sugar (Table 1 and 2).
By the viscometry, the intrinsic viscosity and thermal denaturation of the PSC were measured (Fig. 1 and 2) and following results were obtained; [η]: 15.2 dl/g, TD: 31°C, whereas Ts was 59°C.
By the sedimentation analysis of the PSC, the molecular weight was proved to be 350000 in native state, and 130000 (α-component) and 200000 (β-component), respectively in denatured state.
By the starch gel electrophoresis method of Kulson et al. (1964), the PSC was separated to the sub-units of αl, α2, β11, β12 and γ components.View full abstractDownload PDF (1262K) -
Juichiro J. MATUMOTO, Eisei MATSUDA1967 Volume 33 Issue 3 Pages 224-228
Published: 1967
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESS1. Two groups of tuna meat, one frozen with the liquid nitrogen and another air frozen at -20°C. were stored at -20°C. to compare the rate of discoloration during the frozen storage.
2. Freezing with liquid nitrogen was found effective in preventing the discoloration and other quality changes during the frozen storage as compared with the air freezing.View full abstractDownload PDF (254K) -
M. FUJIYA1967 Volume 33 Issue 3 Pages 230-236
Published: 1967
Released on J-STAGE: February 29, 2008
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S. TAKAGI1967 Volume 33 Issue 3 Pages 237-242
Published: 1967
Released on J-STAGE: February 29, 2008
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Y. HASHIMOTO1967 Volume 33 Issue 3 Pages 243-250
Published: 1967
Released on J-STAGE: February 29, 2008
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Y. MUNAKATA1967 Volume 33 Issue 3 Pages 251-254
Published: 1967
Released on J-STAGE: February 29, 2008
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I. HANYU1967 Volume 33 Issue 3 Pages 255-261
Published: 1967
Released on J-STAGE: February 29, 2008
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Y. KATSUKI1967 Volume 33 Issue 3 Pages 262-263
Published: 1967
Released on J-STAGE: February 29, 2008
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T. KUROKI1967 Volume 33 Issue 3 Pages 264-274
Published: 1967
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSDownload PDF (2359K)
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