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Volume 52, Issue 1
Displaying 1-28 of 28 articles from this issue
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Tatsuo Hamano, Shuhei Matsuura1986 Volume 52 Issue 1 Pages 1-10
Published: January 25, 1986
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe maximum and minimum prey sizes of the Japanese mantis shrimp Oratosquilla oratoria were estimated from equations based on the morphology of the raptorial claw (second maxilliped) and from foraging behaviour. The optimal prey size was predicted, theoretically, from these values and experiments confirming this prediction were conducted using living prey shrimps and artificial prey models. The preferred prey size was approximately the mean between the maximum and minimum values obtained theoretically.View full abstractDownload PDF (651K) -
Hiroshi Hatanaka1986 Volume 52 Issue 1 Pages 11-17
Published: January 25, 1986
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe data on size composition and some biological charactors of Illex argentinus in the waters off Argentina were collected by R/V SHINKAI MARU from April 1978 to April 1979. Based on the mean lengths of monthly size compositions, the von Bertalanffy's growth equations were estimated. The equations were ML=26.48 (1-e-0.28(t-0.44)) for males and ML=34.13(1-e-0.18(t-0.27)) for females where ML and t were mantle length in cm and age in month, respectively. It was indicated that this species had a one-year life span, viz. they were born in austral winter to early spring, attained at maturity at the same season of the next year and died after spawning.View full abstractDownload PDF (437K) -
Hiroshi Hatanaka1986 Volume 52 Issue 1 Pages 19-22
Published: January 25, 1986
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe body sizes at early stages of short-finned squid Illex illecebrosus, Family Ommastrephidae, in the Northwest Atlantic were described based on 565 individuals of lazvae and juveniles collected by R/V KAIYO MARU during January-March 1982. The size ranges at Rhynchoteuthion and transition stages were 1.6-5.7mm and 4.0-8.2mm in dorsal mantle length (DML), and change-overs from Rhynchoteuthion to transition stages and from transition to juvenile (post-Rhyncho-teuthion)stages occurred at the lengths about 5mm and 7mm DML, respectively.View full abstractDownload PDF (241K) -
Konrad Dabrowski, Fumio Takashima, Carlos Strüssmann, Takayoshi Y ...1986 Volume 52 Issue 1 Pages 23-30
Published: January 25, 1986
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSResults of the experiments leading to successful rearing of larvae of whitefish Coregonus lavaretus and peled C. peled aze presented. Live Artemia nauplii as first food for coregonids was compared with dry pelleted diets based on yeast and freeze-dried liver. In separate trials, mortality of fasting larvae and “point of no return” (PNR) were determined. Data from labora-tory studies on larval feeding behavior on live Artemia, rate of successful feeding and satiation time, are also presented.
In both growth trials the final individual weight of fish fed live Artemia was significantly higher than fish fed dry diets. Growth and survival of whitefish was better than that of peled on the best dry diets after 34 days of rearing.
PNR determined as the time of 50% survival of fish amounted to 11.1 and 13.2 days at 16.2°C for white fish and paled larvae, respectively.
The intake of Artemia nauplii and the percent of successful attacks of prey increased with whitefish larvae length. Whitefish larvae decreased feeding intensity after initial 2 min of feeding and maintained to feed at the same intensity up to 10 min.
First feeding larvae of peled consumed more prey and proportion of larvae feeding was higher at 15.6°C than at 8.7°C when fasted for 10 days. Larvae fasted longer than time of PNR decreased feeding rate, and 90 min of food presence was not sufficient for all larvae to commence feeding.View full abstractDownload PDF (586K) -
Daiku K. Sakai1986 Volume 52 Issue 1 Pages 31-36
Published: January 25, 1986
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe kinetics of agglutination and adhesion of Aeromonas salmonicida, the agent of furunculosis, were investigated with six strains. Three pathogenic strains were autoagglutinative and adhesiveto fish tissue culture (RTG-2 cells), whereas the other three nonpathogenic strains lacked these capacities. The capacities for agglutination and adhesion were inhibited by EDTA, although treatment with pronase and lysozyme produced no inhibitory effect on these capacities. With respect to net electrical charges of cells of agglutinating and nonagglutinating strains, a large difference was detected by electrophoresis; cells of autoagglutinating strains carried negative net electrical charges, and cells of nonagglutinating strains showed positive net electrical charges. Spheroplasts, induced from cells of both strain groups by cultures with a hypertonic medium supplemented with a high concentration of penicillin G, preserved the difference in the capacity for agglutination and in the net electrical charges. Thus, the autoagglutination and adhesion are considered to be due to negative net electrical charges in the interior or surface of spheroplasts.View full abstractDownload PDF (1507K) -
Sei-ichi Okumura, Kazuo Fujino1986 Volume 52 Issue 1 Pages 37-40
Published: January 25, 1986
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSIntraspecific thermostability variations of enzymes and hemoglobin have been reported inseveral species of insect, marine molluscs, and man. The observations on correlations betweensuch variations in wild populations of the pacific abalone, Haliotis discus hannai, and water temperatures in habitat, and on heart rate responses against thermal stresses strongly suggested a probable association between such variations and temperature tolerance of the animals. No suchwork, however, has been reported on aquatic plants or algae. The present paper describes such variations of enzymes in the two species of sea algae, Porphyra yeroensis and Undaria pinnatifida, and analyses the relationships between water temperature in the habitat and the variations in the former species.
Sampled were a total of 83 specimens of P.yezoensis from waters of Yamada, Iwate and Iwaki, Fukushima and of 22 specimens of U. pinnatifida from Sanriku, Iwate. Thallus of eachspecimen was analysed for thermostability variations in the three enzymes according to the methoddescribed before. Vaziations were observed at the three loci coding phosphoglucomutase, phosphoglucose isomerase, and glutamate dehydrogenase in P. yezoensis and those at phosphoglucose isomerase in U. pinnatifida. Close associaticns between water temperatures in habitat and frequencies of thermostability alleles at the three loci strongly suggested existence of temperature-related differential viabilities among these variations.View full abstractDownload PDF (328K) -
Mamoru Yoshiya, Yozo Wada, Akihiko Kuwahara, Yuichi Hamanaka1986 Volume 52 Issue 1 Pages 41-47
Published: January 25, 1986
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThree thousand topshells, Batillus cmrnutus, artificially igcubated and cultured in tank until about 20mm in shell height, were released to four rocky and stone areas with a depth of 0-0.5m, 0.5-1.5m, 1.5-2.3m and 2.3-4.0m respectively, in the western Wakasa Bay, on the 28th of May, 1984.
The growth and survival rates of the topshells after releasing decreased with the increase of depth. In the azea with a depth, shallower than 0.5m, the topshells grew up to 37mm in mean shell height and 89% shells survived for 136 days. The highest growth rate (6.0mm per month) obtained between August and October. On the other hand, in the deeper area with a depth of 2.3-4.0m the shells grew up to 27mm and only 2.4% shells survived for 136 days. After releasing, the topshell moved only short distance. For example in the area shallower than 0.5m, the shell diffused horizontally up to 12m from the released point in 136 days, especially 55% shells aggre-gated in the neighbouring area of released point (up to 4m from released point).
The above results, suggest that the area with 0-0.5m depth is satisfactory for growth and survival of young topshell, compared with the area of more than 0.5m depth.View full abstractDownload PDF (1164K) -
Nobuhiko Taniguchi, Akihiro Kijima, Junji Fukai, Yoshikazu Inada1986 Volume 52 Issue 1 Pages 49-53
Published: January 25, 1986
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe ploidy manipulation was applied in breeding ayu Plecoglossus altivelis to examine the condition needed to induce triploids and gynogenetic diploids at successful rates with high survival rates. First, ultraviolet (UV) ray doses between 0-19260 erg/mm2 were tested to inactivate sperm genetically. Then, cold shock treatment at 0-0.5°C for 30 or 60min were conducted to detain the 2nd polar body in fertilized egg. The best elapsed time before the start of the cold shock was examined between 0-15min. Based on the appearance of the haploid syndromes in the embryo, a dose of UV ray of at least 6000 erg/mm2 was required to inactivate sperm genetically. An elapsed time of 4 to 6min was required before the start of cold shock after insemination. Gynogenetic diploid embryos before hatching had a survival rate of 54% at optimum induction whereas triploid embryos survived 61% under the same conditions using same egg lot. The success rate of inducing triploid based on chromosome counts, was 100% using normal sperm and eggs cold shocked at 6min after insemination for 30 or 60min. The success rate of inducing gynogenetic diploid based on chromosome counts was also estimated to be 100% using UV (9630 erg/mm2) irradiated sperm after which the ferilized eggs were cold shocked.View full abstractDownload PDF (1788K) -
Yoshihiro Inoue, Yozo Tawara, Masaki Matsuo1986 Volume 52 Issue 1 Pages 55-60
Published: January 25, 1986
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe investigation of the behaviour of flying fishes, Cypselurus heterurus doderleini, and Cypselurus opisthopus hiraii Abe, with the scanning sonar was conducted day and night in the set-net fishing ground of Goto Islands in October 1983.
The results are that the fish schools mainly have diurnal migration activity. They migrated offshore from early in the morning till noon and they moved inshore from afternoon till evening. The size of fish schools was larger early in the morning than in the day time. They mainly swim near the surface and have many variations of schooling. When the schools were moving offshore eazly in the morning, they were caught by the set-net. The fish schools were held and led to the mouth of the set-net by the leader net. Only those fish schools that moved to the mouth of the set-net were caught, due to the fact that many fish schools have an avoiding reaction toward the body of the net.View full abstractDownload PDF (374K) -
Tuneo Konagaya1986 Volume 52 Issue 1 Pages 61-64
Published: January 25, 1986
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSA telemetric system for plotting isothermal contours on the coastal fishing ground was described. The temperatures at nine points in the fishing ground were measured and the data were transmitted with pulse-width code at every 30 min from compact telemetering buoys to the base station. Timing of transmissions of every buoy deployed at the points was controlled with internal clocks. The signals sent from the buoys were received as serial data at the station on land. A computer was used for drawing isothermal contours.View full abstractDownload PDF (276K) -
Tuneo Konagaya1986 Volume 52 Issue 1 Pages 65-68
Published: January 25, 1986
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSAn acoustic telemetry system for measuring a cross-sectional structure in the sea has been developed. The system consisted of an ultrasonic receiver, tape-recorder and five communication capsules which transmit the acoustic signal at regular intervals. The telemetry links from under-water were made through the capsules. The capsules were fixed at equal intervals on the cable which had a depressor huug on it and towed at a steady speed. The signal sent from the capsules was caught by the receiver on board. From the data obtained by the system, an isothermal con-tour of the cross section was drawn by the use of computer. This paper describes the system in detail and gives a testing result.View full abstractDownload PDF (273K) -
Ichiro Hara1986 Volume 52 Issue 1 Pages 69-73
Published: January 25, 1986
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSRecent attempts to assess a stock quickly have been actively carried out. Two types of surveys may be suitable as methods, namely, ship-and air-borne observation. In this paper, we use the aerial observation for the reasons described later. The aerial observations were performed four times around the areas where big catches of sardine have been taken. In the surveyed area, schools of Japanese sardine can be sighted and counted easily. It is, therefore, very advantageous to use aircraft for assessing sazdine stock quickly. The line transect method was applied on the basis of the data and the assumption, such as dimensions of schools, weight of a school, and density in a school. Although the method used here has many problems to be solved, this method for pelagic fish is useful and satisfactory. So we think this method may be used widely in future.View full abstractDownload PDF (400K) -
Osamu Fukuhara, Toru Fushimi1986 Volume 52 Issue 1 Pages 75-80
Published: January 25, 1986
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe larval development and growth of Plecoglossus altivelis are described based on a series of 268 reared specimens, ranging between 6.1 and 88mm standard length (SL). Development of morphological characters are described, with special reference to fin formation.
Transformation from the larval to juvenile stage was observed when fish attained about 27mm SL, 80 to 90 days after hatching. Fin rays completed segmentation at 33mm SL, and branch-ing at 42mm SL. Larval growth for 140 days was expressed by linear regression. Relative length of preanal length to total length changed drastically during yolk-sac larva to shortly before transformation, then became constant after 45mm TL. The importance of organogenesis and morphometric characters with respect to the ecological aspects of early life stages is discussed.View full abstractDownload PDF (574K) -
Osamu Fukuhara1986 Volume 52 Issue 1 Pages 81-91
Published: January 25, 1986
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSLarval rearing and morphological observations were performed to qualify the biological chazacters in the early life stage of Japanese flounder Paralichthys olivaceus. Lazval development from hatching to metamorphosis was described in detail including squamation and fin develop-ment. Transformation from larvae to juveniles occurred between from 11.0mm to 12.5mm SL (SL), and eye migration was completed from 10.5mm SL. The eye migration was assumed to be completed when larvae were more than 17.0mm SL. Swimming speed of iarvae was re-corded at about 4.0mm/s for larval stage, and increased prior to morphological transition.
The change of morphometric characters was closely related with the developmental changes of transformation and eye migration, and with behavioral and ecological changes as well. It was consequently suggested that morphological developments of various organs were implicated in the functioaal significance and also the shift of the life pattern of ibis species.View full abstractDownload PDF (918K) -
Shinichiro Kawaguchi, Noritatsu Sano, Mutsuro Okino, Yoshiharu Mizuara ...1986 Volume 52 Issue 1 Pages 93-97
Published: January 25, 1986
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThis paper presents results of simulation and fundamental experiments by aruminum balles, in order to adopt the Frequency Diversity Method which is a new data processing technique for Acoustic Fish Assessment System.
First we denote that the interference component of instantaneous power for received signal decreases effectively to adopt the Frequency Diversity Method.
Next we define the estimation function which expresses efficiency quantitatively of Frequency Diversity Method, and denote that interference component decreases more than -6 dB when we use three frequency bands.
Lastly we develop the Hydro Ascoustic Fish Assessment System which applies Frequency Diversity Method (using three frequency bands of 45 KHz, 50 KHz, and 55 KHz).
The results show that the received signals using aruminum balles (15mm, 30mm, 50mm) are good approximate to the value of simulation.View full abstractDownload PDF (340K) -
Masayuki Furuichi, Hiromi Taira, Yasuo Yone1986 Volume 52 Issue 1 Pages 99-102
Published: January 25, 1986
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSIn order to investigate the availabilities of α-starch and glucose in the nutrition of yellowtail Seriola quinqueradiata, the fish were fed on the diets containing α-potato starch and glucose at a level of 10% or 20% for 30 days. The 10% α-potato starch and 10% glucose groups showed no significant difference in the growth and feed efficiency. The growth of the 20% α-potato starch group w s similar to that of the 10% α-potato starch group, though the feed efficiency was ap-preciably low. However, the_20% glucose group exhibited the extremely low growth and feed efficiency. On the other hand, the percent absorption of glucose within 2h after the administra-lion of diets was considerably high as compared with that of α-potato starch, and the blood sugar levels were higher in the glucose groups than in the α-potato starch groups. Moreover, the gly-cosurla was recognized in the former groups, whereas it was scarcely detected in the latter groups. These findings indicate that the availability of glucose in yellowtail is lower than that of α-potato starch, as well as in carp Cyprinus carpio and red sea bream Chrysophrys major.View full abstractDownload PDF (239K) -
Shinya Ishio, Masato Kuwahara, Hisaki Nakagawa1986 Volume 52 Issue 1 Pages 103-108
Published: January 25, 1986
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSSince Fe-bound P in sea sediment reacts with H2S and liberates phosphate ion into water, it may be associated directly with the emergence of red tide. Thus, it is important to know their contents in the sediment. However, there has been no method to extract Fe-bound P alone, although several methods can extract both Fe-and Al-bound P at the same time. The solubilties of FePO4 and AlPO4, which are usual components of Fe-and Al-bound P, are minimized near pH 6. Therefore, Fe-bound P alone may be extracted provided that Na2S solution is added to the suspension of sea sediment, after the pH was so adjusted that with the maleate buffer solution a value of near 6 was obtained. Actually, FePO4-P alone was extracted from the mixture of FePO4 and AlPO4 and the various amounts of FePO4-P purposely added to sample sediments were extracted quantitatively by adding the maleate buffer solution, successively the Na2S solution. For the practical use of this method, the necessary conditions were examined and described. By devising this method, Fe-bound P and Al-bound P were distinguished. Since Na2S is converted largely to H2S during the extraction of Fe-bound P from the sediment, “H2S-extraction method” was given to this method.View full abstractDownload PDF (502K) -
Takeshi Sano, Satoshi F. Noguchi, Takahide Tsuchiya, Juichiro J. Matsu ...1986 Volume 52 Issue 1 Pages 109-114
Published: January 25, 1986
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSWe designed a new method to evaluate the gel properties of fish meat gel products, by a stretching test, and a film-shaped gel sample, ca. 1mm thick, is used as a test piece. This method had the following advantages: The method can be applied to a small amount of sample and less than 500mg of sample was needed for one measurement. It had high accuracy and reproducibility. It showed high correlations with the pushing-in method using cylindrical test pieces, and values could be converted to those from each method. The fracture test and measurement of Young's modulus (non-fracture test) can be performed at the same time, while for the pushing-in method using cylindrical gels, the fracture test and measurement of Young's modulus must be done sep-arately. Thus the present stretching method was effective particularly when a large amount of sample could not be obtained, and also possessed several other advantages as above. Therefore, the present method may contribute for evaluation of the gel properties of fish meat gel products.View full abstractDownload PDF (465K) -
Takao Matsuno, Masaaki Katsuyama, Toshihiko Hirono, Takashi Maoka, Tad ...1986 Volume 52 Issue 1 Pages 115-119
Published: January 25, 1986
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe carotenoids in the integuments of tilapia Tilapia nilotica were re-examined from the stereochemical point of view,
(1) Tunaxanthin A(1), luteiu, and zeaxanthin previously reported were mixtures of the following two to three stereoisomers; tunaxanthin A (1)-tunaxanthin A (1) and tunaxanthin F (lactucaxanthin) (2), lutein-lutein A (3) and lutein D (4), and zeaxanthin-(3R, 3'R)-zeaxanthin (5), (3R, 3'S)-zeaxanthin (6) and (3S, S'S)-zeaxanthin (7), respectively. And also, rhodoxanthin fraction was separated into three geometric isomers, (6Z, 6'Z)-rhodoxanthin (8), (6'Z)-rhodoxanthin (9) and (all E)-rhodoxanthin (10).
(2) (6R, 6'R)-ε, ε-carotene-3, 3'-dione (11), (6S, 6'S)-ε, ε-carotene-3, 3'-dione (12), (3R, 6'R)-3-hydroxy-β, ε-caroten-3'-one (13), (3R, 6'S)-3-hydroxy-β, ε-caroten-3'-one (14), (3R, 6R, 6'S)-3-hydroxy-ε, ε-caroten-3'-one (15) and (3R, 6R, 6'R)-3-hydroxy-ε, ε-caroten-3'-one (16) were addi-tionally found in the fish together with carotenoids mentioned above by using an innovatory method.View full abstractDownload PDF (287K) -
Takeshi Okada, Norio Inoue, Minoru Akiba1986 Volume 52 Issue 1 Pages 121-126
Published: January 25, 1986
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe release of the bound nucleotide from carp myosin B during frozen storage was investi-gated in connection with the changes in ATPase activities. The bound nucleotide consistedpredominantly of ADF. The bound nucleotide of the myosin B was partially or lost completelyduring the frozen storage and the extent of decrease depended on the initial KCl concentrationbefore freezing and the storage temperature. Na-glutamate inhibited the decrease to a largeextent. The decrease of the bound nucleotide occurred in preference of the decrease of Mg-andCa-ATPase activities. On the other hand, the decrease of the bound nucleotide and the Mg-and Ca-ATPase activities by blending for 40min and by a prolonged dialysis against 0.1M KCl solution at pH 7.0 were to a small extent in comparison with those to the frozen storage. Whenthe myosin B in 0.1M KCl solution was dialyzed against the KCl solution of 0.4-1.33M concen-trations at pH 7.0, a higher KCl concentration resulted in a greater decrease of the bound nu-cleotide. The above findings support that the decrease of the bound nucleotide during frozenstorage seems to be mainly due to the concentration effect of salt.View full abstractDownload PDF (300K) -
Hideaki Yamanaka, Kuniyoshi Shimakura, Kazuo Shiomi, Takeaki Kikuchi1986 Volume 52 Issue 1 Pages 127-130
Published: January 25, 1986
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSChanges in contents of seven non-volatile amines, putrescine (Put), cadaverine (Cad), tyramine (Tym), tryptamine (Tpm), spermidine, spermine and histamine (Hm) were examined in the meats of sardine Sardinops melanosticta and saury pike Cololabis saira during storage at 5°C or 20°C.
The levels of Put, Cad, Tym and Tpm in the meats of these fishes increased as decomposition progressed, regardless of storage temperature. Of these four amines a maximum formation was observed for Cad, which seems to be the most useful index for decomposition of fish; below 15mg/100g of meat at the passable stage, between 15 and 20mg/100g of meat at the stage of initial decomposition and over 20mg/100g of meat at the stage of advanced decomposition. Since Hm formation varies greatly with fish species and storage temperatures, the use of Hm as a chemical index for decomposition of fish is not always proper.View full abstractDownload PDF (326K) -
Yutaka Kariya, Yoshihiro Ochiai, Kanehisa Hashimoto1986 Volume 52 Issue 1 Pages 131-138
Published: January 25, 1986
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSProtein composition and myofibrillar Ca2+-ATPase activity of arm and mantle muscles of the octopus Octopus vcrlgaris were compared. Protein compositions of both muscles were very similar to each other, though protein content was much higher in the arm than in the mantle muscle. Both muscles showed a slight but clear difference in myoflbrillar Ca2+-ATPase activity (at pH 7.0): the optimum temperature was 40°C in the arm and 42.5°C in the mantle muscle, the specific activities at their optimum temperatures being close to each other. The pH optima of both myofibrils appeared at 6.0, 8.5 and 10.5. Mantle myofibril generally showed a higher activity than the arm myofibril.
Transmission electron microscopy showed that both muscles were of the obliquely striated type. The cells of the mantle muscle contained many mitochondria in vascular cavities, indicating that this muscle is a highly oxidative tissue, as is the dark muscle of fish.View full abstractDownload PDF (1240K) -
Yuzuru Suzuki, Ryoichi Nakamura, Motokazu Nakahara, Taishi Ueda1986 Volume 52 Issue 1 Pages 139-145
Published: January 25, 1986
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSIn order to gain further information on the biochemical behavior of radionuclides and radio-nuclide-binding proteins in a marine fish, the greenling Hexagrammos otakii was simultaneously marked with a mixed solution of 137Cs, 54Mn, 65Zn and 60Co by caudal peduncle injection. After determination of radioactivity dlstribution, the liver was homogenized.
The percentage of radioactivity in the liver to the total was 14 for 137Cs, 35 for 54Mn, 22 for 65Zn and 10% for 60Co, respectively. In the liver, 86% of 137Cs was distributed in the super-natant (soluble protein) fraction, whereas only 31% of 54Mn was distributed in the supernatant. Gel chromatography and electrophoresis showed that radionuclides were bound to several proteins with different molecular weights. Their amino acid compositions widely differed from each other. The present results suggested that there was a biochemical rule(s) by which each radionuclide bound to those proteins.View full abstractDownload PDF (440K) -
Toshiaki Ishii, Kunio Ikuta, Tsuguo Otake, Masako Hara, Masafumi Ishik ...1986 Volume 52 Issue 1 Pages 147-154
Published: January 25, 1986
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSDistribution of eighteen elements in the soft part of the marine bivalve Cyclosunetta menstrualis was examined by means of inductively coupled plasma atomic emission spectroscopy, atomic absorption spectrophotometry, and electron probe X-ray microanalysis. The highest concentra-tion was found in the kidney for Mg, Ca, Sr, P, Mn, Fe, Co, Ni, Zn, Cd, Sn and Pb. Especially, the manganese concentration in the kidney was 6820±1760μg/g wet weight, which accounted for more than 90 percent of the total manganese in the soft part.
Exttacellular granules of various sizes were observed in the lumen of the kidney tubules by light and electron microscopy. The scanning electron micrograph indicated that large sized granules (10-200μm) were composed of numerous fine (0.1-1.0μm) and small (1.0-10μm) sized granules. Many spherical substances and black concentric layers were observed inside the large granules. The granules contained extremely high levels of Mg, Ca, P, Mn, Fe, Zn etc. For example, the concentrations of manganese and zinc in the dried granules were 44200±15600μg/g and 22800±1600μg/g, respectively. It was concluded that the high accumulation of certain elements in the kidney resulted From the existence of metal-containing granules.View full abstractDownload PDF (1706K) -
Shin-ichi Teshima, Akio Kanazawa, Yasuo Kakuta1986 Volume 52 Issue 1 Pages 155-158
Published: January 25, 1986
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe prawn Penaeus japonicus was reared with diets containing3%soybean lecithin(diet A)and no supplemental phospholipids (PL) (diet D)for 30 days. The deficiency of PL in dietssignificantly reduced the weight gain and feed conversion efficiency. The prawns receiving diet D without supplemental PL contained a lower concentration of PL such as phosphatidylcholine and phosphatidylinositol in the whole body than the ones receiving diet A with supplemental PL. The retention (%) of dietary lipids, especially cholesterol, in the body was also significantly lowerin the prawns receiving diet D than in those receiving diet A. These data indicate that the juvenile prawn requires dietary sources of PL for good growth; suggesting that the dietary PL may benecessary for the effective utilization of lipids such as triglycerides and cholesterol in the diets bythe prawn.View full abstractDownload PDF (318K) -
Shin-ichi Teshima, Akio Kanazawa, Yasuo Kakuta1986 Volume 52 Issue 1 Pages 159-163
Published: January 25, 1986
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe present investigation was undertaken to see the postprandial variation in lipid com-positions of the hepatopancreas, hemolymph, and muscle after feeding of the test diets with 3% soybean lecithin (diet A) and without supplemental phospholipids (PL) (diet D) to understand the nutritional role of dietary PL in the prawn Penaeus japonicus. Total lipid (TL) concentrations of the hepatopancreas and hemolymph were higher in the prawns receiving diet A than in those receiving diet D during the holding period from 1h to 6h after feeding. The increase of TL concentrations of the hepatopancreas was mostly attributable to that of neutral lipids (NL) such as triglycerides (TG) and cholesterol (CH), whereas that of the hemolymph was mainly due to PL such as phosphatidylcholine besides NL such as TG and CH. On the other hand, no re-mazkable difference was seen about the variation of lipid class concentrations of the muscle between the two diet groups as observed in the hepatopancreas and hemolymph. On the basis of these data, dietary PL was suggested to take some part in the transport of dietary lipids such as chole-sterol and triglycerides in the body through the hemolymph.View full abstractDownload PDF (363K) -
Youn-Keun Oh, Harumi Kojima, Tamao Yoshida, Meiko Wakabayashi, Mikio K ...1986 Volume 52 Issue 1 Pages 165
Published: January 25, 1986
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSDownload PDF (104K) -
Takao Matsuno, Takashi Maoka, Keiko Shiba, Masahiro Ookubo1986 Volume 52 Issue 1 Pages 167
Published: January 25, 1986
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSDownload PDF (76K)
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