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Volume 59, Issue 2
Displaying 1-29 of 29 articles from this issue
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Yasumasa Sawashi, Haruhiko Fujimoto, Mikio Azuma, Shinsho Nishijima, M ...1993 Volume 59 Issue 2 Pages 191-199
Published: February 25, 1993
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe ayu population in the middle of the Ryukyu Archipelago was recently found to differ considerably from that in the mainland of Japan, and was described as a distinct subspecies (Plecoglossus altivelis ryukyuensis). Little is, however, known about the border between the distributional ranges of nominotypical and the Ryukyuan subspecies. Observation carried out in the northern Ryukyus showed that the ayu also occurs in a few streams with relatively long middle reaches on Yaku Island, but that none inhabit Nakanoshima Island. Variations in meristic characters of specimens from Yaku Island were within those of the nominotypical subspecies. Allozyme analyses by starch gel electrophoresis showed that the ayu from Yaku Island was genetically much closer to the nominotypical subspecies from Kyushu and Honshu than to the Ryukyuan subspecies from Amami-oshima Island. We thus conclude that the ayu on Yaku Island represents the southernmost population of the nominotypical subspecies in the area of the Japan-Ryukyu Archipelago, and that the ayu on Amami-oshima Island forms the northernmost population of the Ryukyuan subspecies. Complete allele substitution detected in five enzyme loci, as well as the absence of any particular genetic similarity, between the populations of Yaku and Amami-oshima Islands, reinforces the previous hypothesis that the two subspecies have been isolated from each other genetically for a long period of evolutionary time.View full abstractDownload PDF (657K) -
Nobuo Horiki1993 Volume 59 Issue 2 Pages 201-207
Published: February 25, 1993
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSIchthyoplanktonic fauna in the Kii Channel is usually dominated by eggs of the sea bass Lateolabrax japonicus and larvae of the greenling Hexagrammos otakii in winter. They are mainly spawned in the inner parts of the channel, or those further inside. The sea bass eggs and the greenling larvae are strictly neustonic. Their geographical distribution in the Kii Channel are essentially influenced by the rise and fall the two water masses, the coastal and oceanic waters. Both the sea bass eggs and the greenling larvae are always distributed most densely just inside the boundary zone. When the oceanic water is prevailing their distribution become restricted to the inner part of the Kii Channel, while when the oceanic water is retreating offshore, their distribution expands outside the channel.View full abstractDownload PDF (427K) -
Chikara Kitajima, Yasuyuki Yamane, Seiichi Matsui, Yoichi Kihara, Masa ...1993 Volume 59 Issue 2 Pages 209-216
Published: February 25, 1993
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe densities of red sea bream Pagrus major larvae and juveniles were measured in a series of saline solutions of different densities. The volume of swim bladder and body weight on a wet and dry basis were also measured.
After the embryonic and prelarval period with slightly positive or virtually neutral bouyancy, the density of postlarvae increased to a level of ca. 1.028g/cm3 and began to change diurnally. After the inffation of the swim bladder, a diel change of buoyancy became marked, viz. day-negative and night-neutral. Buoyancy regulation was effected by a voluminal change in the swim bladder, which was induced by a photocycle, viz. light-deflation and dark-inflation. No such diel change of density could be detected in the transition from larva to juvenile of 12 to 13mm TL, and the density increased toward ca. 1.035g/cm3 at 25mm TL.
From these results, it is suggested that the diel and ontogenetic change in buoyancy in larval and juvenile red sea bream controls their vertical distribution and habitat transition.View full abstractDownload PDF (1997K) -
Hiroshi Kitani1993 Volume 59 Issue 2 Pages 217-221
Published: February 25, 1993
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe morphology of postlarvae changes with each molt, and a sequential description is essential for scientific identification. Morphological characters of the postlarvae of P. californiensis reared in the laboratory were examined and described sequentially in order to compare them with those of wild specimens. Differences in the rostral and carapace length at the first appearance of the spine or spinules were recognized between the reared and the wild ones. A comparison with previous descriptions reveals some differences in rostral form and in the relative length of the antennular flagella. The relative growth of carpus of the 3rd pereopod against the carapace and the presence of thoracic spines are proposed as possible discriminating characters of the species.View full abstractDownload PDF (339K) -
Hiroshi Kitani1993 Volume 59 Issue 2 Pages 223-227
Published: February 25, 1993
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSPostlarvae of known parentage of Penaeus vannamei were reared in a laboratory. Their morphological characters were sequentially described, and compared with those of wild specimens and with previous descriptions.
Differences in relative rostral length and in size at the first appearance of the spine and spinules have been detected between reared and wild postlarvae. A similarity in morphology was confirmed by a comparison with previous studies, but a difference in the ratio of antennular flagella, which was a subgeneric criterion of penaeid postlarvae, was revealed. The relative growth of carpus was compared between specimens in different localities, and the similarity in this growth was revealed.View full abstractDownload PDF (312K) -
Boon-Keng Lim, Kazutsugu Hirayama1993 Volume 59 Issue 2 Pages 229-235
Published: February 25, 1993
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe effect of initial stocking density (8-47 thousand indiv./m3) on larval mass production of kuruma prawn was studied in ten trials. The larvae were reared for 24 days from the nauplius stage to the 15-16th day of the postlarval stage. The survival rates ranged from 0.29 to 0.84, and were above 0.5 in eight trials. The daily declining pattern of survival numbers in these eight trials colud be expressed by a logarithmic linear regression throughout the rearing period, thus the population decreased in a constant proportion. By a negative correlation between initial stocking density and survival rate, 24-day rearing obtains a survival rate of more than 0.5 with an initial stocking density of less than 30 thousand indiv./m3. Relationship between initial stocking density and harvested biomass per initially stocked individual (final individual fresh body weight×survival rate) showed a more significant negative correlation. The maximum yield was estimated as approximately 80g/m3 at an initial stocking density of 30 thousand indiv./m3. The actual value of the largest yield among these trials was 87g/m3 at an initial stocking density of 25 thousand indiv./m3.View full abstractDownload PDF (514K) -
Boon-Keng Lim, Kazutsugu Hirayama1993 Volume 59 Issue 2 Pages 237-243
Published: February 25, 1993
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSLarval growth and elemental composition of kuruma prawn Penaeus japonicus reared from the nauplius stage to the 15-16th day of the postlarval stage (24 days) were determined by conducting ten experimental rearing runs. The larvae from the nauplius stage grew linearly against a logarithmic fresh body weight to the 1st postlarval stage (27±1°C), while the growth increments of the postlarvae reared at 23±1°C decreased proportionally. The water component of the larvae over all stages constituted ca 79% of fresh body weight. The content of three elements (C, N, P) was ca. 38, 9.6, and 1.5% in dry body weight, respectively. C: N ratios decreased as the dry body weight increased. This tendency implies that the larger larvae accumulated more protein than lipid in their body. The average C: N: P atomic ratio over the larval stages was 24:6:1.View full abstractDownload PDF (371K) -
Tadashi Tokai, Ryozo Sato, Hiroshi Ito, Takeru Kitahara1993 Volume 59 Issue 2 Pages 245-252
Published: February 25, 1993
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThis paper describes the characteristics of yearly fluctuations in the landings of the ocellate puffer Takifugu rubripes which migrates from the open sea into a spawning area in the Inland Sea of Japan. The authors analyze landing statistics by three fisheries, namely line, surrounding seine, and setnet fisheries around the spawning ground, and obtain the following results. The abundance of the ocellate puffer around the spawning area corresponds directly to its landing by the setnet fishery there. On the other hand, landings of the ocellate puffer seem to fluctuate mainly according to the fishing effort rather than to its abundance in the line and surrounding seine fisheries. Thus, using landings by setnet fishery as an abundance index, year-class strength is estimated with age compositions of landings by setnet fishery for the ocellate puffer population around the spawning ground. Consequently, the age at full recruitment is found to be 3 years old. The landing of some large year-classes decline at a virtually constant rate with age after full recruitment. This suggests that the same year-classes migrate into the spawning ground in subsequent years. Thus, it follows that good landings result chiefly from dominant year-classes, e. g. the year classes of 1983 and 1986, in the population.View full abstractDownload PDF (554K) -
Kazuhiko Mochida, Hiroya Takahashi1993 Volume 59 Issue 2 Pages 253-261
Published: February 25, 1993
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSAutoimmune responses against testis material were induced in mature male Nile tilapia Oreochromis niloticus, by injecting allogeneic testis homogenate emulsified with Freund's complete adjuvant. Some immunized males decreased their fertility 4 to 8 weeks after the first injection. Sperm motility of these fish decreased markedly. Ultrastructural observations of the testis and proerties of spermatozoa in immunized fish suggested that this reduction was mainly caused by agglutination of spermatozoa by means of anti-sperm autoantibody penetrating the seminal lobules. Eight weeks after injection, globate structures, which seemed to originate from unabsorbed FCA component, occurred throughout the testicular tissue of some fish, possibly resulting in an obstruction of a normal flow of milt in the testis and a failure of milt discharge in immunized fish.View full abstractDownload PDF (3592K) -
Syuiti Kitada, Kazuhiko Hiramatsu, Hirohisa Kishino1993 Volume 59 Issue 2 Pages 263-267
Published: February 25, 1993
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThis study deals with the problem of a change-point alternative in the estimation of fishing and natural mortality rates from tag recoveries. We consider some models of mortality rates, and estimate parameters by a maximum likelihood procedure. Taking the overdispersion of the recovery data into account, we employ the likelihood function of a normal approximation of Dirichlet compound multinomial distribution. In a case study of red sea bream Pagrus major in the Seto Inland Sea, we could not detect the change-point of the natural mortality rate. It was suggested that fluctuation in the recovery data substantially influenced the estimation of the changepoint mortality rates.View full abstractDownload PDF (361K) -
Syuiti Kitada, Hirohisa Kishino, Kazuhiko Hiramatsu1993 Volume 59 Issue 2 Pages 269-272
Published: February 25, 1993
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSTo evaluate the difference in quality of hatchery-reared fingerlings released into the same field at the same time, we propose simultaneous estimation of mortality rates taking the correlation between two series of recovery data into account. We consider the joint likelihood function as an extension of the bivariate normal distribution. For a test of mortality rates of two groups released, the likelihood ratio test is used. As an example, we applied this procedure to the case of red seabream Pagrus major in the Seto Inland Sea. We obtained maximum likelihood estimates for four models. The correlation coefficient was estimated to be over 0.9, and two models which assumed no correlation were rejected. For the two models of the correlation, the likelihood ratio test could not reject the hypothesis of no difference in the two groups. We also found that the X2 test of recovery rates under a contingency table is invalid for the overdispersion and correlation of recovery data.View full abstractDownload PDF (359K) -
Takashi Matsuishi, Tokio Wada, Yoshiharu Matsumiya, Hirohisa Kishino1993 Volume 59 Issue 2 Pages 273-278
Published: February 25, 1993
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSIn purse seine fisheries which target pelagic fish in the daytime, the catch per shot represents the weight of the school, because schools are caught in one shot. Under the constraint of limited working time, purse seine fishery does target large schools to maximize the benefit. Because of this selectivity, the catch per shot is not proportional to the population abundance. In this paper we clarify the relationships between the catch per shot, the number of shots, the total catch, and the population abundance, assuming the ideal behaviour of fishermen maximizing the total catch. According to the result of a numerical example, the relationship between the catch and the population is a concave function. Thus the responses of total catch weight or catch per shot to changes in population abundance are not sensitive unless the population is highly depleted. In this situation, there is some risk that the detection of changes in population may be delayed when the change is observed only in terms of the catch per shot or the total catch.View full abstractDownload PDF (354K) -
Hiroyo Matsumoto, Akihiro Hamasaki1993 Volume 59 Issue 2 Pages 279-283
Published: February 25, 1993
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSAttempts have been made to apply microalgae to the production of valuable products, the solution of environmental problems, and closed ecological life support systems in space. In applying microalgae in these areas, it is necessary to culture microalgae on a stable and long-term basis. In order to realize this, it is desirable to establish away of accurately grasping the soundness of microalgae. We have previously developed a method of using an oxygen production monitor for measurement of the O2 production rates of Chlorella. In the present study, we have ascertained that our method enables us to grasp simply and quickly the activity of Chlorella on a quantitative basis, as compared with visual observation and an assay of growth rate.View full abstractDownload PDF (1620K) -
Tetsushi Sawada, Koretaro Takahashi, Mutsuo Hatano1993 Volume 59 Issue 2 Pages 285-290
Published: February 25, 1993
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe binding position as well as the number of docosahexaenoic (DHA) moieties in tuna and in bonito orbital fat triglycerides (TG) were investigated. DHA was dominantly bound in the sn-2 position. The most abundant TG molecular species was 1 (or 3)-palmitoy1-2, 3 (or 1)-di-doosahexaenoin. This molecular species was at most less than 8% in TG fraction. DHA was distributed to many kinds of molecular species, mostly in triacid type and diacid TGs. Tridocosahexaenoin was present in a trace amount. When tuna and bonito orbital fats were each randomized, both TGs could be easily discerned by their molecular species pattern. It was concluded that the basic TG molecular species pattern of bonito orbital fat matches that of the tuna, and that these can be substituted for each other as a valuable resource.View full abstractDownload PDF (389K) -
Shigeki Sawayama, Yoshihiko Sako, Yuzaburo Ishida1993 Volume 59 Issue 2 Pages 291-294
Published: February 25, 1993
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSMarine bacteria were screened for mating inhibitor on a toxic dinoflagellate Alexandrium catenella using a hypnozygote (cyst) formation bioassay. A highly active bacterium was cultured, and the cell extract was fractionated by means of heat treatment, DEAE-cellulose chromatography, and gel filtration to obtain a partially purified inhibitor (MIMB). MIMB was characterized as a protein with a molecular weight of more than 700 kDa. MIMB blocked the sexually attaching stage of the mating reaction in A. catenella at an extremely low concentration of 7μg/ml.View full abstractDownload PDF (283K) -
Masura Honya, Tomihisa Kinoshita, Masahiro Ishikawa, Hiroe Mori, Kazut ...1993 Volume 59 Issue 2 Pages 295-299
Published: February 25, 1993
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSIn Laminaria japonica cultivated at Date Bay, Hokkaido, we investigated the monthly varlation in alginate content and its M/G ratio together with the variatlon in mannitol and some minerals such as calcium, magnesium, iron, and phosphorous. The following result was obtained. The relative content of the MG block of alginate varied only slightly from March to October in an almost similar pattern to the total alginate content. In contrast, the content of the M block increased wlth the growth of kelp toward summer, while that of the G block showed an inverse pattern. The global pattern of variation in the content of mannitol resembled that of the M block; it increased conspicuously in summer, but decreased gradually toward the end of autumn.
The contents of inorganic elements varied with characteristic patterns. except for calcium which seemed to increase in concert with the increase of the M block toward autumn.View full abstractDownload PDF (299K) -
Tsuyoshi Baba, Yoko Watase, Yukiko Yoshinaga1993 Volume 59 Issue 2 Pages 301-307
Published: February 25, 1993
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe effects of immersion administration of levamisole on the activation of nonspecific defense mechanisms were examined in carp Cyprinus carpio. Survival rates after a challenge with Aeromonas hydrophila were enhanced by immersion in levamisole (10μg/ml, 25°C, 24h). The effectiveness appeared 1 day after administration and lasted for at least 2 weeks. Chemotactic ability, phagocytic activity and production of active oxygen (chemiluminescence) in head kidney phagocytes were activated by immersion.
This phagocyte activation might give levamisole-administered carp enhanced protection against an A. hydrophila challenge, at the beginning of the infection.View full abstractDownload PDF (469K) -
Masashi Hosokawa, Hiroaki Ohshima, Hiroyuki Kohno, Koretaro Takahashi, ...1993 Volume 59 Issue 2 Pages 309-314
Published: February 25, 1993
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSPhosphatidylcholine containing highly unsaturated fatty acid (HUFA-PC) was prepared by porcine pancreatic phospholipase A2, which catalyzed esterification between lysophosphatidylcholine (LPC) and highly unsaturated fatty acid (HUFA), under a scaled-up reaction system. Fatty acid mixture prepared from sardine oil, purified eicosapentaenoic acid (EPA), and purified docosahexaenoic acid (DHA) were used as the substrates of HUFA. The yield of HUFA-PC was 17.0-19.9%. Synthesized phosphatidylcholine containing DHA (DHA-PC) prepared from LPC and DHA had a DHA content of 46.5%, which indicated almost the maximum theoretical incorporation rate. DHA-PC molecular species consisted of (16:0, DHA), (18:0, DHA), (18:1, DHA), (18:2, DHA), and (18:3, DHA). It was obvious that the acyl groups in sn-1 of these molecular species originated from the substrate LPC. The rate of retinoic acid induced differentiation of the human promyelocytic leukemia cell line (HL-60) was promoted by growing HL-60 cells in 10% FBS-PNM pre-treated with either EPA-PC or DHA-PC.View full abstractDownload PDF (405K) -
Manabu Kitamikado, Mitsuhiro Nishimura, Kuniko Yamaguchi, Chao-Huang T ...1993 Volume 59 Issue 2 Pages 315-320
Published: February 25, 1993
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSOligosaccharides were prepared from alginate, guluronate-rich blocks, and mannuronate-rich blocks of alginate by bacterial alginate lyases, and were examined for antimicrobial action against four strains of aerobic and two strains of anaerobic bacteria, as well as six strains of fungi. O1-igosaccharides from guluronate-rich and mannuronate-rich blocks showed significant activity against the aerobic and anaerobic bacteria, but none of the oligosaccharides were antifungal. The bacteriostatic action of the oligosaccharides differed depending on the degree of polymerization and hepta- and hexa-saccharides were highly bacteriostatic. None of the saccharides tested were utilized by any of the seven strains of intestinal bacteria.View full abstractDownload PDF (1282K) -
Tadahisa Seikai, Izumi Kinoshita, Masaru Tanaka1993 Volume 59 Issue 2 Pages 321-326
Published: February 25, 1993
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe predator-prey relationship of crangonid shrimp Crangon affinis and juvenile Japanese flounder Paralichthys olivaceus was examined under laboratory conditions.
Visual observation and the carcasses of the juvenile flounder provided an insight to the predatory process. The shrimp hooked the juvenile flounder with their movable chcla, and devoured in the order of the abdomen, tail, trunk, eyes, and head.
Predation rates: the percentage of flounder lethally attacked by the shrimp per container and numbers of lethally attacked flounder juveniles per shrimp decreased as the size of the flounder increased. These values were greater during dark periods than during light periods. This fact indicates that shrimp are more active and effective predators at night. The daily ration of shrimp was roughly estimated to be 20-25% of their body weight, based on the mean weight of prey consumed daily per 1g of the predator. The maximum size of flounder susceptible to shrimp predation was expected to be larger than 25mm SL. These results suggest that predation pressured by shrimp is considerably heavy on newly-settled Japanese flounder, especially at night.View full abstractDownload PDF (395K) -
Masao Adachi, Yoshihiko Sako, Yuzaburo Ishida1993 Volume 59 Issue 2 Pages 327-332
Published: February 25, 1993
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSEight isolates of the toxic dinoflagellate Alexandrium tamarense from four different bays of Japan and the Gulf of Thailand were examined for differentiation using seven monoclonal antibodies, M8751-1, M151-1, M22-1, M102-3, MT15-1, MT15-2, and MT15-4, against cell surface antigens of Alexandrium.
Antibodies M8751-1, M102-3, and M151-1 derived from Japanese strains reacted to all the Japanese strains of A. tamarense tested, but not to Thai strains by means of indirect immunofluorescence assay, while two antibodies MT15-2 and MT15-4 derived from the Thai strain reacted to two Thai strains but not to all Japanese strains. Antibodies M22-1 and MT15-1 reacted with all strains from both countries. These data corresponded with the results of ELISA and SDSPAGE analysis of whole protein. Using the western-blotting method, M8751-1 reacted with a protein band at about 50kDa, which were found in most of the Japanese isolates, but not in the Thai ones.
All isolates that have been morphologically identified as the same species, A. tamarense, are grouped into two different populations according to monoclonal antibodies. One of these is the Japanese population, while the other group is the Thai one. These monoclonal antibodies appear to be useful for the identification of intra-and inter-species of these organisms.View full abstractDownload PDF (2745K) -
Mamoru Yoshimizu, Sataporn Direkbusarakom, Yoshio Ezura, Takahisa Kimu ...1993 Volume 59 Issue 2 Pages 333-338
Published: February 25, 1993
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSHybridomas which produce species-specific and strain-specific monoclonal antibodies (MAbs) against Aeromonas salmonicida have been established. Reaction of three MAbs, Nos. 9, 17, and 40, was strain-specific while one MAb, No.27, was species-specific. MAb 27 reacted with A. salmonicida subsp. salmonicida, achromogenes, masoucida, and atypical A. salmonicida. The titer of this MAb, a culture fluid of hybridoma, was 1:8, 1:256, 1:8, and 1:128 for agglutination test, ELISA, FAT, and colony blotting test, respectively. The molecular weight of the antigen recognized by MAb 27 was 51 to 62 kDa.View full abstractDownload PDF (1235K) -
Kazuya Taniguchi, Jun-ichi Yamada, Kazuya Kurata, Minoru Suzuki1993 Volume 59 Issue 2 Pages 339-343
Published: February 25, 1993
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe feeding-deterrent activity of methanol extract from the brown alga Dictyopteris undulata that grows densely in the nursery grounds of the abalone Haliotis discus was tested on the abalone H. discus hannai by the cellulose plate bioassay method. Bioassay-guided isolation afforded five active sesquiterpene derivatives (zonarol, isozonarol, chromazonarol, zonarone, and isozonarone) from the neutral and acidic fractions of the methanol extract. It seems that D. undulata adopts to sublittoral zones where abalone are abundant by virtue of having feeding-deterrent sesquiterpenes.View full abstractDownload PDF (369K) -
Veronica R. Alava, Akio Kanazawa, Shin-ichi Teshima, Shunsuke Koshio1993 Volume 59 Issue 2 Pages 345-351
Published: February 25, 1993
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe influence of diets complete in or free from either phospholipid (soybean lecithin) or n-3 highly unsaturated fatty acids (n-3 HUFA, squid liver oil) on the gonadosomatic index (GSI) and tissue lipid composition of ablated female Penaeus japonicus (mean weight=20.2±0.9g) were determined. Bilateral eyestalk ablation was performed 31-37 days after feeding on experimental diets and GSI was examined after 20 days of each prawn's ablation.
Supplementation of both phospholipid and n-3 HUFA resulted in the highest GSI (3.0±0.8, P<0.05). The absence of either phospholipid or n-3 HUFA significantly retarded GSI development (1.3±0.6 and 1.4±0.5, respectively). The complete diet produced higher total lipid in ovaries, hepatopancreas, and muscle than the incomplete diets. Regardless of diets, ovaries and muscle had greater polar lipid deposits, in contrast to the hepatopancreas wherein neutral lipid was dominant. Triglycerides and phosphatidylcholine were the dominant lipids in the ovaries.View full abstractDownload PDF (478K) -
Zihua Wu, Shinji Kojima, Akito Ushirono, Tosio Misima, Katsuyasu Tachi ...1993 Volume 59 Issue 2 Pages 353-367
Published: February 25, 1993
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe changes of resting metabolism (RM) with rapid lowering of water temperature and myofibrillar (Mf) Mg2+-ATPase activity at different temperatures were determined by using 14 species of fish collected from four waters: Sakishima Islands (28°C), Amami-Oshima (25°C), the sea adjacent to Nagasaki (22°C), and the Yellow Sea (10°C).
Both mean values of RM and Mf Mg2+-ATPase activity of fish at a certain habitat temperature tended to decrease with the lowering of habitat temperature, while the opposite results were observed under the same temperature. There exists a positive thermal compensation in fish in habitats of low temperature. The temperature dependences of RM and Mf Mg2+-ATPase activity were found to be the largest in fish in the Yellow Sea, but tended to be smaller with the decrease of habitat temperature in the other three waters. These results were caused by the fact that the Arrhenius plots of Mf Mg2+-ATPase activity showed a break in slope at near 15°C in all fishes.
A significant positive correlation was found between both the values of RM and Mf Mg2+-ATPase activity at habitat temperature and their temperature dependences. The results suggested that the RM and Mf Mg2+-ATPase activity were closely related.View full abstractDownload PDF (658K) -
Xiao-Feng Guo, Shugo Watabe1993 Volume 59 Issue 2 Pages 363-369
Published: February 25, 1993
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSMg2+-ATPase activity and inactivation rate constant of Ca2+-ATPase were measured for actomyosins including intact and desensitized types from 10°C- and 30°C-acclimated carp. Mg2+-ATPase activities of both intact and desensitized actomyosins from the cold-acclimated carp were about twice those from the warm-acclimated carp counterparts. In addition, the inactivation rate constant of the cold-acclimated preparation was larger than that of the warm-acclimated one, when the same type of actomyosin was compared. Actomyosin reconstituted with the 10°C-acclimated desensitized actomyosin and 30°C-acclimated Ca2+ regulatory proteins consisting of tropomyosin and troponin showed Mg2+-ATPase activity and thermostability similar to those of intact actomyosin from the 10°C-acclimated carp. No acclimation temperature-dependent effect of regulatory proteins on the activity or thermostability of actomyosin was observed when the warm-acclimated desensitized actomyosin and the cold-acclimated regulatory proteins were combined.View full abstractDownload PDF (1303K) -
Takahito Kojima, Kazumasa Ikuta, Akifumi Ito, Kazumasa Yoza, Hideo Soe ...1993 Volume 59 Issue 2 Pages 371
Published: February 25, 1993
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSDownload PDF (99K) -
Jun Kurita, Takashi Oshiro, Fumio Takashima, Mitsuru Sakaizumi1993 Volume 59 Issue 2 Pages 373
Published: February 25, 1993
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSDownload PDF (1114K) -
1993 Volume 59 Issue 2 Pages 377
Published: 1993
Released on J-STAGE: April 21, 2008
JOURNAL FREE ACCESSDownload PDF (25K)
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