巻号一覧
50 巻, 10 号
選択された号の論文の29件中1～29を表示しています
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敦 慶老, 田中 昌一1984 年 50 巻 10 号 p. 1627-1633
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーAs there only otolith samples for six month period, the time of the ring formation was estimated by comparing the back-calculated length with the growth curve for younger age groups obtained from fhe movement of the mode of fhe length composition. The rings were estimated to be formed from February to May, one ring in a year. The largest number of rings counted was 12. VON BERTALANFFY's growth curve was fitted to the back-calculated total length. Almost no appreciable difference was observed between sexes, but some differemce was shown between regions. Growth equation in cm and year for each region is EAST region Lt=124[1-e-0.124(t+0.30)] Lt=132[1-e-0.122(t+0.39)] Lt=133[1331-e-0.121(t+0.21)]
East region showed the smaillest growty among three. These growth curves were compared with those of other authors and some discussions were presented.抄録全体を表示PDF形式でダウンロード (376K) -
桑 守彦1984 年 50 巻 10 号 p. 1635-1640
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーInvestigation of fouling organisms on the galvanized steel wire neting of flogting cage culturing marine fishesinthe middle and west of Japan was conducted.
The fouling was fouling was found to be more in cages culturing blue fin tuna and red sea bream, and to be less in cages culturing young puffer and striped Knifejaw than that culturing yellow tail. Akso, the fouling on wire netting was found to be less than that on polyethylene netting.
The striped knifejaw, about 9% cultured in combination with yellow tail was found to prey upon the tail and fins of sich yellow tail whose suimming ability was weakened, bu not to harm healthy fish. Besides, in the cobination culturing cage of three species of adult puffer, red sea bream and striped knifejaw (C.1.2%) it was found that they did not harm each other.
The striped knifejaw Oplegnathus sp. in those combination culturing cage was observed to prey upon and remove all kinds of fouling organisms on the wire netting as is obsereved in the single species culturing cage.
On the other hand, the cage culturing yellow tail, the phenomenon of fouling restrait could be observed on the internal surface in the bottom wire netting due to the fish body contact.抄録全体を表示PDF形式でダウンロード (1248K) -
山本 勝太郎1984 年 50 巻 10 号 p. 1641-1646
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーThe distributions of yarn lengths are investigated for some commercial 3-ply cords with different number of yarns. The results are compared with those calculated by Treloar's theory. There is no general agreement between the measured and calculated values. The range of measured values has a tendency to be smaller than the calculated values. This proves that the yarn migration occurs along the ply axis and that the yarn configuration in the ply is distored. Furthermore, the results of measurements suggest that the yarn length distribution in commercial cords may be an index of cord quality.抄録全体を表示PDF形式でダウンロード (1139K) -
大内 晟1984 年 50 巻 10 号 p. 1647-1651
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーThis study was made to explore the possibility of predicting the red tide by the discriminant analysis based on quality data of surface water in the northern part of Hiroshima Bay. All the data (N=526) obtained from 1976 to 1982 were divided into two groups, non-red tide group and red tide group, according to a critical value 250 μg/l for the PON concentration. Then, the discriminant analysis was performed using six variables (WT, SAL, TDP, DIN, DON, PON). The results obtained are as follows.
1) Mahalanobis'distance was 8.85 and the probability of misclassification was evaluated to be 6.8%. The rate of misclassification was actually 4.2% for 526 data.
2) When a station is classified into the non-red tide group and its misclassification probability becomes more than 25%, or less than 5%, there is a great tendency for red tide to occur around the station. In the latter case, salinity ranged from 5.1 to 15.1% or TDP was 45-141 μg/l, DIN was 439-618 μg/l respectively, and the red tide actually occurred at a rate of 52%.
3) When a station belonging to the red tide group has the misclassification probability more than 17%, there is a great tendency for red tide to disappear.
4) This method has a great advantage in judging a red tide occurrence, because only one misclassification probability is used instead of six variables.抄録全体を表示PDF形式でダウンロード (372K) -
大野 正夫1984 年 50 巻 10 号 p. 1653-1656
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーAn abundance of floating seaweeds depends upon the movement of the ocean currents around Japan. Young fishes, especially the juvenile of yellowtail, which live together with floating seaweeds during spring to early summer, are collected and cultred on a large on a large scale by fishermen. Thereofre, it is important to know the distrbution of floating seaweeds both in quantity and quality for the developnment of the fisheries resources.
The survey of floating seaweeds was conducted many times by using vessels and fishermen's boats during 1980-1982 in the Pacific Ocean near the coast of Shikoku Island of southern Japan. The floating seaweeds wree more abundant from April to May. The individual bulks ranged from 0.5 to 5.0kg in this area. These floating masses were composed of mainly the genus SARGASSUM. Although 29 species were recorded along the coast of Shikoku Island, S. horneri, S. patens, S. tortile and S. serratfolium were the most dominant of the floating seaweeds. Plants were fonud in almost healthy conditions with holdfast and receptacles intact. They seemed to have drifted from the nearcoast. Characteristicall, floating seaweeds of southern Japan, occur in small bulks during April-May and decline by the end of August.抄録全体を表示PDF形式でダウンロード (280K) -
川崎 健, 熊谷 明1984 年 50 巻 10 号 p. 1657-1663
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーThere have been controversies on whether the preadult and adult of sardine are mainly herbivores or carnivores. The results of an extensive work on the stomsch contents of the sardine carried out in the seas east of Hokkaido to off Joban in their feeding period during May-December 1982, showed that the ingested food might fairly reflect the composition of environmental plankton and many sardine took more plants than animals, when compared by volume. The variations in abundance of the three pacific sardines have well matched the long-term climatic trend, probably due to the considerable dependence of fishes on algae that are the biological products closest to solar radiation.抄録全体を表示PDF形式でダウンロード (469K) -
田中 信彦, 大和田 紘ー, 浅川 明彦, 飯倉 敏弘, 北村 章二, 杉山 元彦1984 年 50 巻 10 号 p. 1665-1669
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーEpiphytic communities on Sargassum piluriferum C. Agardh and artificial seagrasses were examined in Sargassum bed of Ago Bay every month during March 1981 and March 1982.
Most of the epiphytes were diatoms, and their cell numbers were 106-107cells/g dry weight of Sargassum and 103-106 cells/cm of artificial seagrass filament.
The diversity of epiphytic flora on the Sargassum was greater than on the artificial seagrass filament, and occurring species changed more frepuently on the Sargassum than on the artificial seagrass filament.
Main dominant epiphytes on Sargassum were algae which predominated particularly in the early stage of epiphytic algal succession on the fresh substrate.
The results obtained in the present study suggest that epiphytic flora on Sargassum remain in the early stage of epiphytic algal succession throughout the year.抄録全体を表示PDF形式でダウンロード (331K) -
藤野 和男, 山森 邦夫, 奥村 誠一1984 年 50 巻 10 号 p. 1671-1675
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーApparent association between frequencies of alleles encoding thermostability variations of enzymes and water temperatures observed in wild populations has suggested differential temperature tolerances related to the genetic variations in the pacific abalone Haliotis discus hannai.
Heart-rate responses, as a physiological indicator, against water-temperature changes were compared between animals with differential genetic make-ups in thermostability of enzyme to examine the above results suggested from observing wild populations by using a total of 98 specimens of the pacific abalone, sampled from waters of Sanriku, Iwate and Rebun Islands, Hokkaido. After being acclimated to a rearing tank with water temperature regulating system, each animal was subjected to a constant rate of change of water temperatures for recording heart-rate responses until being sacrificed. Heart-rate was recorede as frequency of changes of impedance between two elec-trodes inserted immediately dorsal to the heart through fine holes in the shell.
Temperatures, at which maximum heart-rate (or one half of the maximum) appeared, varied from one animal to another, as demonstrated by distributions of selected parameter(s) of heart-rate curve. In addition, associations between the parameter and genetic make-up of thermostability of enzyme of individual animals were observed, thus supporting the view on possible adaptive value of temperature tolerance, suggested from observations on wild populations noted above.抄録全体を表示PDF形式でダウンロード (1311K) -
梅崎 勇1984 年 50 巻 10 号 p. 1677-1683
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーSargassum hemiphyllum C. AGARDH was studied ecologically on the basis of materials collected at Hansti, Obama Bay, a branch bay of Wakasa Bay, in middle Honshu, facing the Japan Sea, from June 1980 to August 1981. Annually, laterals 1.40(±036) to 4.32 (±0.92) in number on their stem of which 0.70 (±0.63) to 2.66 (±1.03) are dropped off af ?? er becoming mature in June. After dying back, the basal part of primary laterals pwrsists on their stem as scars or remains. It was roughly estimated from the numberof scars that the longevity of the stenm or plant is 2-3 (-4) years. Lateral branches arise spirally on their primary lateral with a divergince of 1/3. Soon after fertile primary laterals degenerate in June, fresh primary laterals which are less than 10 or 20cm in lengh, begin to elongate and continue to grow, reaching a maximum length in April of the following year. In April, the first primary laterals attained a heighe of 69.0cm on an average. In May, the whole plant reached amaximum weight of 6.3g (wet weight) fo which 4.8g was from the first primary lateral, corresponding to 76.1%of the plant. On a primary lateral of up to 30cm in length, a total length of all lateral branches was about two timses longer than the length of their primary lateral. That of all lateral branches arising on primary lateral which grew to 50-80cm in length was 5-8 times longer. The species was dioevious: The ratio of female to male plants was 1:1. The primary laterals arising on the same stenm were of fhe same sex.抄録全体を表示PDF形式でダウンロード (529K) -
長谷川 英一, 添田 秀男1984 年 50 巻 10 号 p. 1685-1691
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーIn order to ovserve the structure of fish schools in three dimensions, a stereo method with two cameras was devised.
A cross striped plate was set in front of the aquarium or behind it. This was used for calculating the three dimensional position of the object in the aquarium. As a result, the maximum absolute error was 2.2cm for the photo taken from above, while it was 1.5cm for the photo taken from the side. These errors were discussed from the viewpoint of the value for m(distane from the front of aquarium to camera). The result obtained was that the accuracy impfoved as the value for mabecame small.
Relattion among F (length of base line), θ (range of vision of the lens)and m were expressed by the following inequality: m>F/4 tan (θ/2).抄録全体を表示PDF形式でダウンロード (1210K) -
城 久, 矢持 進, 安部 恒之, 河合 章1984 年 50 巻 10 号 p. 1693-1700
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーIn summer, oxygen-deficient layer is being formed extensively in the waters of the lower strata of Osaka Bay, from the interior to the east part of the bay. A large amount of inorganic nutrients are found in such lower waters. Based on the accumulated dada obtained from 1972 to 1982 by us, a remarkable regularity was observed as to the concentrations of inorganic nutrients and dissolved oxgen (DO) in the water. Plots of dissolved inorganic phosphorus (DIP) versus apparent oxygen utilization (AOU) are approximately on tow straight lines with an intersection at AOU ca. 2-4ml/l, whereas dissolved in organic nitrogen (DIN) is plotted versus AOU on a single straight line. However the abundance ratio of DIN in oxidized forms(NO2-N+NO8-N) decreases with the increase of AOU in the lower waters with AOU above ca.4ml/l.
It mya be concluded that the generation of DIP and DIN in the decomposition process of organic materials accompanies the DO consumption at a definite rate in oxic waters. In the oxygendeficient lower waters, DIP increases in its concentraation by the liberation from the lower sediments, and DIN remains in the reduced form(NH4-N)by the suppressed oxidation process.抄録全体を表示PDF形式でダウンロード (604K) -
水野 治夫, 磯 直道, 斎藤 隆英, 末本 高広1984 年 50 巻 10 号 p. 1701-1704
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーTrimethylsilyl derivatives of alginic acid were obtained by silylation with hexamethyldisilazane, and some physicochemical proper of the derivatives were investigated.
When a powder of alginic acid was directly silylated, it gave to a derivative which was not soluble in organic solvents.
When swollen by acetoned, another derivative was prepared which was soluble in ethylene glycol and formamied, and insoluble in hydrocarbon solvents. The highest degree of silylation attained in this case was about 50%. The viscometric behaviors of the derivative in ethylene glycol and formamide were similar to that of polyelectrolytes. The weight average molecular weight of a derivative whose silylation degree was 49%, was 2.28×10 ?? . The value was about 1/2 that of the sodium alginate as the starting materials. The degree of polymerization was estimated to be 809.抄録全体を表示PDF形式でダウンロード (239K) -
イスラム ナズルールＭＤ．, 板倉 隆夫, 元広 輝重1984 年 50 巻 10 号 p. 1705-1708
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーTwo types of fish protamines (clupeine sulfater and salmine sulfate) were tested for their antibacterial action on a number of bacterial strains. All the Gram-positive organisms studied were more or less sensitive to these protamies, while there was little or no effect on Gram-negatives. The action was almost same in the two pootamines. According to MIC values, Bacillus coagulans and Bacillus megaterium were the most sensitive organims. The protamines were bactericidal against five out of six bacillus organisms studied and the organism licheniformis was capable to resist the bactericidal action of the protamines.抄録全体を表示PDF形式でダウンロード (290K) -
手島 新一, 金沢 昭夫1984 年 50 巻 10 号 p. 1709-1715
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーThe effects of dientary prothin, lipid, and carbohydrate levels on growth and survivl of the pramn larvae were examined by the prawn larvae were fed 12 diets containing various of protein (casein;25, 35, 45, and 55%) and lipid (6.5, 11.5, and 16.5%)at a fixed carvohydrate level of 15%. In experiment2, the prawn larvae were given 9 diers containing vaious levels of protein (35, 45, and 55%) and carbohydrate (5, 15, and 25%) at a fixed lipid level of 6.5%. The effects of protein lecels on growth and survival of the pranwn varied with dietary carbohydrate levels but not with the dietary lipid leves. The elevation of lipid leves from 6.5% to 16.5% did not improve growth and survival when the diets contained suffcient leves (15% or more) of carvohydrate. Contrarily, the elevation od dietary carvohydrate lecels from 5 to 25% improved the survival of the prawn larvae when the diets xontained low levels (35%-45%) of protein. On the basis of these data, the opimum protein levels for the prawn larvae were estimated to be around 45%, 45%-55%, and 55% or more when the diets contained 25%, 155, and 5% levels of carbohydrate, resprctively.抄録全体を表示PDF形式でダウンロード (456K) -
吉中 禮二, 佐藤 守, 森下 丈二, 伊藤 慶明, 藤田 真夫, 池田 静徳1984 年 50 巻 10 号 p. 1717-1722
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーLittle carboxypeptidases B actvity was detected in the extract of the pancreas of the carfish Parasilurus asotus. However, when the extract was left at 4°C, carboxypeptidase B activity increased with time and reached to maximal level after 4 days. These results indicate that carboxypeptidase B is stored as zymogen in the pabcreas.
Two enzymes, designated as carboxypeptidases B1 and B2, were isolated from the autoactivated extract of the catfish pancreas by CM-cellulose column chromatography. The homogeneity of both purifired enaymes was demonstrated by polyacrlamide gel electrophoresis. The molecular weight of 33, 000 estimated by SDS-polyacrylamide gel electrophoresis was found to be same for both enzymes. The amino acid acid commpositions of both enzymes were found to be similar to each other.抄録全体を表示PDF形式でダウンロード (996K) -
吉中 禮二, 佐藤 守, 森下 丈二, 池田 静徳1984 年 50 巻 10 号 p. 1723-1727
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーTwo carboxypeptidases B from the pzncreas of the catfish Parasilurus asotus were found to have pH optima of 7.5 and were found to be stable between pH 6.5 and 9.0. Both enzymes were strongly inhibited by EDTA, o-phenanthroline, and cysteine. The enzymes inactivated by EDTA were regenerated almost completely by the addition of ZnCl2. These results indicate that both enzymes are metalloenzymes which require zinc for activity. Both enzymes were found to be able to hydrolyze Bz-Gly-Arg and Bz-Gly-Lys.
These results indicate the close similarity between two catfish carboxypeptidases B and suggest that the catfish enzymes are closely related to carboxypeptidases B from other species.抄録全体を表示PDF形式でダウンロード (319K) -
落合 芳博, 渡部 終五, 橋本 周久1984 年 50 巻 10 号 p. 1729-1733
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーA1, A2 and DTNB light chains were isolated from the ordinary muscle of skipjack Katsuwonus pelamis by a method consisting of DEAE-cellulose column chromatography and high-speed gelfiltration.
Molecular weights were 30, 000, 22, 500 and 20, 000 for A1, A2 and DTNB light chain, respectively. The three light chains were rather acidic, with isoelectric points ranging from 4.7-4.8. All of them were rich in aspartic and glutamic acids, asanine and glycine, and poor in half cystine, tyrosine and histidine, as are light chains from other sources. Alcontained alanine at an especially high level, while DTNB light chain contained try ptophan exclusively. They all clearly showed absorption maxima at 253, 259, 265 and 269 nm, indicating abundunce of phenylalanine.
It was concluded from these results that skipjack myosin light chains are compraable to those of other fishes so far reported, except for small but signifcant differences in chromatogrphic behavior, molecular size and amino acid composition.抄録全体を表示PDF形式でダウンロード (1729K) -
松野 隆男, 勝山 政明, 眞岡 孝至1984 年 50 巻 10 号 p. 1735-1737
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーTunaxanthin isolated from free xanthophull fraction in the integuments of Tilapia nilotica was shown to be identical to lactucaxanthin, (3R, 6R, 3'R, 6'R )-ε, ε-carotene-3, 3'-diol (4).
This is the first report on the isolation of lactucaxanthin (4) in the animal kingdom.抄録全体を表示PDF形式でダウンロード (142K) -
冨岡 和子, 遠藤 金次1984 年 50 巻 10 号 p. 1739-1744
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーThe purified 5'-nucleotidase from carp muscle showed the optimum activity at about pH7.5 At above this pH, Mg2+ affected the 5'-nucleotidase activity in a complex manner, showing a second optimum at pH 9 in the presence of some buffer ions. ADP and ATP were effective inhibitors of the enzyme in a manner of competitive inhibition. ADP was a far more powerful inhibitor than ATP. The enzyme activity was also inhibited by the addition of EDTA and the inhibition was dependent on the time of incubation with chelating agent. The inhibition of the enzyme by EDTA apparently followed a second order equation, logVt/Vo=-k[EDTA]t. The apoenzyme which was prepared by treatment with EDTA restored the original activity effectively by the addition of Zn2+, and was more unstable on heating than the intact enzyme.抄録全体を表示PDF形式でダウンロード (406K) -
原 明弘, 宇田 文昭1984 年 50 巻 10 号 p. 1745-1756
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーThe Time-Temperature Tolerance (T-TT) of fish muscle during storage under various temperature conditions was investigated using K value as a freshness estimation index.
K value of fish muscle during the early stage of storage at a low temperature, where the freshness of fish is not affected by bacterial action, is nearly predicted by the following equation. K(t)=100-(100-K(0))e-kt where k is the rate constant of IMP degradation, t is storage time, and K(t) is K value at t. The rate comstane k obeys Arrhenius's function: k=Ae-(E/RT) where E is activation energy (cal/mol), R is gas constant, T is absolute temperature, and A is constant (1/day).
Where temperature chanees with the other conditions being the same as described a bove, K value at a given storage time and temperature is pred by the following approximate equation. K(t2)=K(t1)+{a1∫t22t11θ(t)dt+a2∫t22t11θ(t)2dt+a3(t2-t1)}(100-K(t1)) where a1 to a3 are constants, t is storage time, θ(t) is temperature at t, and K(t) is K value at t.
K value at first increases gradually by auto-degradation, and then usually after an inflection point shows another rapid increase which is caused by bacterial action.抄録全体を表示PDF形式でダウンロード (776K) -
奥積 昌世, 粟野 正石, 大木 由美1984 年 50 巻 10 号 p. 1757-1762
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーMany studies have been made on hisidine decarboxlase by the mesophiles such as P. morganii, E. coli and C. perfringens, however the decarboxylation mechanism of the psychrophilic and halophillic histamine former such as the N-group bacteria has not yet been studied.
The present paper deals with the effects of temperature, pH value and NaCl concertration on the histidine decarboxylation by the N-group bacteria.
Results obtained are summarized as follows:
(1) The optimum temperature for the growth of the N-group bacteria was around 20°C, while that for the histamine formation was about 25°C, the highest temperature for supporting their growth. The histidine decarboxylase activity of the washed cell suspension tested was highest at a temperature between 35°C to 40°C.
(2)The optimum pH value for the growth of the N-group bacteria was between 6 to 8, while that for the histamine formation was be ween 5 to 6. The activity of histidine decarboxylase of the washed cell suspension was highest at pH 5.4.
(3) The optimum concentration of NaCl for the histamine formation by the N-group bacteria was 1 to 3%, corresponding to the optimum concentration for their growth. On the other hand, there was no correlation observed between the histidine decarboxylase activity of the washed cell suspension and the Nacl concentration.抄録全体を表示PDF形式でダウンロード (461K) -
Masayoshi OGAWA, Noma Barreto PERDIGAO, Mampe Erones de ASNTIAGO, 小嶋 秩 ...1984 年 50 巻 10 号 p. 1763-1769
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーThe incidence of blck spots in shrimp was once again investigated, with empbais on physiological aspects such as molting cycle stages, sex and influence of traumatism on live shrimp during storage in ice.
Appearance of stronger discoloration in femalws, with a statisitcal significance, followed a tecdency similar to the one observed in lobsters.
Inflicted injury did not always induce discoloration in shrimp stored in ice, but when shrimps have been submitted to heavy traumatism and/or blow, discoloration was found to show as far as the superficial muscle. On the other hand most of the common natural appearance of black spots remained in the shell after peeling, and those left off on the superficial muscle could be scrap-ped off the blak membranes.
Anesthetizing of live shrimps in iced water before beheading, that is, application of Euthanssia treatment, showed to have an effective bearing in inhibiting formation of melanin, such as done in the cagee of lobsters.抄録全体を表示PDF形式でダウンロード (459K) -
瀬崎 啓次郎, 広崎 芳次, 渡部 終五, 橋本 周久1984 年 50 巻 10 号 p. 1771-1776
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーThe whole blood hemolyzate, aqueous extracts of the muscle and liver were prepared from the bottlenose dolphin Tursiops truncatus, whitehead grampus Grampus griseus, and their hybrids, and analyzed electrophorectically on polyacrylamide slab gels. The hemolyzate of a hybrid exhibited two fast-migrating albumin-like protein bands whose electrophoretic mobilities were the same as those of bottlenose dolphin and whitehead grampus. So was the case with the muscle or liver extracts. In addition, the mobilities of the fast-migrating bands were the same through the three tissues. Among both dolphins and hybrids, no signficant differences were recognizd in muscle enzymes such as lactate dehydrogenase, malate dehydrogenase, creatine kinase, adenylate kinase, and phosphoglucomutase.抄録全体を表示PDF形式でダウンロード (1930K) -
川合 真一郎, 福島 実, 土永 恒弥, 小田 國雄1984 年 50 巻 10 号 p. 1777-1783
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーThis study was made in order to evaluate the feasiblity of net plankton analysis for monitoring pollution due to heavy metals and synthetic chemicals in seawater. Plankton was collected by using a phytoplankton net in the harbor area of Osaka City, Japan. Heavy metals, organochlorine and organophosphorus compounds in the net plankton and also in the corresponding seawater were determined. The heavy metal concentration in the seawater increased in the order of, Hg<Cd<Pb<Cu, Cr<Ni<Zn<Mn<Fe. In the net plankton, the order was follwes; Hg<Cd<Ni, Cr, Pb<Cu, Mn<Zn<Fe. Except for Ni and Mn, the meatal levels in the net plankton corresponded to those in the seawater, and their bioconcentration factors (BCF) were 1 to 5×104, but in Ni and Mn the factors were 0.4to 0.5×104. Organochlorine compounds such as PCBs and HCH were clearly noticed in net plankton and the levels ranged form 1 to 5 μg/g and from 0.1 to 0.2 μg/g in dry basis, respectively. These values were entirely dependent on the seawater levels and the BCF of PCBs was 11×104 and 0.4×104 in HCH.
Organophosphorus pesticides including diazinon, IBP and fenitorthion were almost always found in the seawater. There compounds, however, were never detected in the net plankton. These results indicate the feasibilty of plankton analysis for monitoring approximate pollution in water, but some problems observed in certain metals and organophosphorus compounds still remain to be studied.抄録全体を表示PDF形式でダウンロード (499K) -
藤井 建夫1984 年 50 巻 10 号 p. 1785
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (82K) -
田中 淑人, 山本 任1984 年 50 巻 10 号 p. 1787
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (71K) -
青木 宙, ツラスト ツレィバーＪ．1984 年 50 巻 10 号 p. 1789
発行日: 1984年
公開日: 2008/02/29
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村井 武四, 秋山 敏男, 渡辺 武, 能勢 健嗣1984 年 50 巻 10 号 p. 1791
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (127K) -
1984 年 50 巻 10 号 p. 1796
発行日: 1984年
公開日: 2008/04/22
ジャーナル フリーPDF形式でダウンロード (75K)
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