巻号一覧
60 巻 (1994)
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- 4 号 p. 433-
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- 2 号 p. 143-
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60 巻, 3 号
選択された号の論文の16件中1～16を表示しています
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山内 晧平1994 年 60 巻 3 号 p. 311-316
発行日: 1994/05/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (1010K) -
畑江 敬子1994 年 60 巻 3 号 p. 317-321
発行日: 1994/05/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (452K) -
田中 栄次1994 年 60 巻 3 号 p. 323-326
発行日: 1994/05/25
公開日: 2008/02/29
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吉岡 基1994 年 60 巻 3 号 p. 327-330
発行日: 1994/05/25
公開日: 2008/02/29
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小池 利通, 塚本 勝巳1994 年 60 巻 3 号 p. 331-340
発行日: 1994/05/25
公開日: 2008/02/29
ジャーナル フリーOntogenic change and stock differences in schooling behavior, smoltification and growth among two wild and two hatchery stocks of the masu salmon Oncorhynchus masou, each 100 juveniles, was observed in 1, 000l circular tanks for one year and nine months.
Hatchery stocks grew faster than wild stocks. Onset of smoltification occurred in age O+ fish of one hatchery stock four months earlier than in the other three stocks. All stocks showed schooling behavior or aggregation during the daytime, while at night, they dispersed throughout the tank and stayed relatively still. Increased schooling behavior was observed in the two wild stocks just before and during smoltification and the swimming layer became shallower, whereas such tendencies were not observed in the two hatchery stocks. Inter-individual distance increased in the two hatchery stocks in direct proportion to body size, whereas the two wild stocks showed a constantly lower distance value. The smoltification period was also characterized by the occurrence of anti-clockwise schooling in every stock.
These behavioral changes occurring with the onset of smoltification in wild stocks seem to be adaptive preparations for seaward migration and marine life. Such distinct differences among stocks may be derived from the effects of domestication and/or the genetic characteristics of each parental strain.抄録全体を表示PDF形式でダウンロード (807K) -
上野 紘一, 井戸本 純一1994 年 60 巻 3 号 p. 341-346
発行日: 1994/05/25
公開日: 2008/02/29
ジャーナル フリーArtificial polyspermy using adhesive spermatozoa can be used as a method of chromosome manipu-lation. In this study, adhesion of funa spermatozoa was attempted as a basis of the polyspermy procedure by using the basic protein protamine of the cell nucleas, and its influence on adherence and motility was examined. Protamine was added to sperm diluted to about 1:100 to make final concentrations of 1, 5, 10, 20, and 30μg/ml, and each of these mixtures was allowed to react for 10 minutes. The rate of adhesion of the spermatozoa (the proportion of adherent spermatozoa to the total number tested) increased as the concentration increased; from 4.8% (at 1μg/ml) to 40.1% (at 30μg/ml). When the treatment was made for 1, 5, 10, 20, and 30 minutes at l0μg/ml and 30μg/ml, the rate of adhesion increased as the reaction time increased; at 10μg/ml it increased from 17.0% (1 min) to 57.2% (30 min), and at 30μg/ml, it increased from 32.5% to 63.0%. When application to chromosome manipulation is considered, the rate of adhesion between two spermatozoa becomes important (based on the diameter of the micropylar canal, it appears that only adherent pairs of spermatozoa can enter the egg), but the rate of adhesion between two spermatozoa did not increase very markedly even when the concentration was increased; at 1, 5, 10, 20, and 30μg/ml, the rates were 4.8, 13.6, 14.1, 13.9, and 18.1%, respectively. Even in the study using different reaction times, the rates of adhesion were almost unchanged: at 10μg/ml the rats ranged from 14.7% to 18.1%, and at 30μg/ml they ranged from 15.5% to 17.0%. After the adhesion treatment, sperm motility lasted 76.4, 73.6, 50.0, 32.0, and 18.2 seconds at 10μg/ml at reaction times of 1, 5, 10, 20, and 30 minutes, respectively. At 30μg/ml, the corresponding values were 52.9, 37.9, 22.7, 26.8, and 5.6 seconds, respectively. The results suggest that reaction for 5 minutes at 10μg/ml is adequate for adhesion between two spermatozoa.抄録全体を表示PDF形式でダウンロード (695K) -
東海 正, 大本 茂之, 松田 皎1994 年 60 巻 3 号 p. 347-352
発行日: 1994/05/25
公開日: 2008/02/29
ジャーナル フリーThis paper describes mesh selectivity curves of unmarketable fish as a means of decreasing by-catch. For six main unmarketable fish species, Engraulis japonicus, Apogon lineatus, Leiognathus rivulatus, Acentrogobius pflaumii, Cryptocentrus filifer, and Repomucenus valenciennei, mesh selectivities are ob-tained from a covered-net fishing experiment using a shrimp beam trawl with codends of six mesh sizes. This paper uses a modified version of Tokai and Kitahara's method of determining the mesh selectivity curve. In this modified method, mesh selectivity is approximated by a function of G/P, where G and P are body girth and mesh perimeter, respectively. The master curves of mesh selectivity are determined as a logistic function by the maximum likelihood method for the six unmarketable fish species. If the mesh size of the codend is increased from 20.6mm commonly used in this area to 24.9mm, the catch numbers of these unmarketable fish are reduced from 53.4% to 16.7% without reducing the catch of the main target species, small shrimps, e.g., southern rough shrimp Trachypenaeus curvirostris. This also saves the labor required to sort usable fish.抄録全体を表示PDF形式でダウンロード (424K) -
酒井 久治, 稲田 博史, 下川 伸也1994 年 60 巻 3 号 p. 353-357
発行日: 1994/05/25
公開日: 2008/02/29
ジャーナル フリーA measuring system with a built-in arithmetic unit was devised to measure the purse line tension during operation. The diameter of the winch drum, and the inlet and outlet pressures of the hydraulic oil motor were measured. The tension measured by this system and the tension measured by a three-rollers type tension meter were compared, and the accuracy of the system was evaluated.
The results show that the system measures the purse line tension to within 5% error. This accuracy is useful to reduce the error in the calculated tension caused by increasing diameter and backpressure of the motor on the purse winch. The system could be widely used to study and measure the mechanical properties of purse seine.抄録全体を表示PDF形式でダウンロード (290K) -
岸野 洋久, 北田 修一, 平松 一彦1994 年 60 巻 3 号 p. 359-364
発行日: 1994/05/25
公開日: 2008/02/29
ジャーナル フリーThe aim of this article is to consider the decision scheme of the sampling design of the survey for the maximum likelihood estimation of the stock composition in the mixed population. We evaluate the precision of the estimate taking full account of the sampling variance in the baseline populations and the mixed populations. Through numerical examples, we studied the optimal allocation of the survey effort on the baseline and mixed populations, and selection of the number and the types of the restriction enzymes in the genetic analysis.抄録全体を表示PDF形式でダウンロード (495K) -
小島 博, 谷口 和也1994 年 60 巻 3 号 p. 365-369
発行日: 1994/05/25
公開日: 2008/02/29
ジャーナル フリーThe annual growth cycle of the brown alga, Ecklonia kurome was surveyed by the leaf-marking method from August 1991 through August 1992 off the Mugi coast of Tokushima Prefecture, Japan. The growth rates of both stipe (length and diameter) and lateral blades (number and length) were high from December through May, and low from May through December, when lateral blades with sori showed an increase. The annual formation and elongation of lateral blades were greater than the annual decay and withering in the plants with stipe length below 20cm, and were less in plants with stipe length above 24cm. The plants with stipe length of 24cm showed the highest fallout products, which had 78 lateral blades and were 33.5m in length.抄録全体を表示PDF形式でダウンロード (330K) -
高橋 祐二, 宮地 純子, 荻野 尚志, 木村 純二1994 年 60 巻 3 号 p. 371-375
発行日: 1994/05/25
公開日: 2008/02/29
ジャーナル フリーThe analysis of components in algae is an important research subject in the fields of food, perfume, and medicinal chemistry because they have characteristic odors and unique structures different from those found in land plants. A systematic analysis of the ether soluble components in Undaria pinnatifida was therefore conducted. The sample was soaked in methanol for one week and the methanol extract was treated with ether in order to remove mannitol. The resulting ether soluble components were then separated and purified by a silica gel column and/or preparative thin layer chromatography. Compounds of hydrocarbons (paraffins, polyolefins), methyl and phytyl esters of fatty acids, long chain aldehydes, and sterols were isolated. Most of these compounds have been found in algae preciously, but some were recognized for the first time in U. pinnatifida.抄録全体を表示PDF形式でダウンロード (401K) -
笠原 賀代子, 岡本 英理子, 西堀 幸吉1994 年 60 巻 3 号 p. 377-380
発行日: 1994/05/25
公開日: 2008/02/29
ジャーナル フリーThe suppressing effect of the leaf or fruit of Japanese pepper Zanthoxylum piperitum DC, on niboshi odor was studied by a combination sensory analysis testing, gas chromatography, and gas chromatograph-y-mass spectrometry.
In sensory tests it was found that the niboshi odor was distinctly suppressed by the addition of Japanese pepper leaf and fruit, respectively. Eight carbonyls and one alcohol identified in niboshi soup stock were also detected in the niboshi soup stock to which Japanese pepper leaf or fruit was added. On the other hand, five compounds (a-pinene, myrcene, limonene, citronellal, and 2-undecanone) identified as main components in leaf and four compounds (myrcene, limonene, citronellal, and geranyl acetate) identified as main components in fruit were also detected in the niboshi soup stock to which Japanese pepper leaf and fruit was added, respectively. The effect of the addition of the above four or five authentic compounds on niboshi odor was then examined using sensory tests.
It was concluded that the above five compounds and geranyl acetate of the above four compounds greatly contributed to masking the odor of niboshi in cases where the Japanese pepper leaf and fruit were respectively added.抄録全体を表示PDF形式でダウンロード (262K) -
阿部 洋一1994 年 60 巻 3 号 p. 381-387
発行日: 1994/05/25
公開日: 2008/02/29
ジャーナル フリーKamaboko gels were prepared by adding 0.3% food additive containing transglutaminase in order to set, at a number of different temperatures from salt-ground meat of walleye pollack frozen surimi. The quality of the kamaboko gels thus formed was compared to kamaboko formed without the additive.
The breaking strength of the kamaboko gel formed with the additive was much higher, whereas the breaking strain remained at a fairly low level. However, gelling of salt-ground meat in the presence of the additive varied somewhat depending on the setting temperature. In addition, solubility of the kamaboko gel formed with the same additive into SDS (sodium dodecylsulfate)-urea-mercaptoethanol mixture was much lower as setting time progressed, while the kamaboko gel without the additive was easily soluble into the same medium.
These results indicate that kamaboko gel prepared in the presence of transglutaminase additive is evidently different from that product without the additive.抄録全体を表示PDF形式でダウンロード (484K) -
石原 良美, 齋藤 寛, 真下 悟, 高野 二郎1994 年 60 巻 3 号 p. 389-390
発行日: 1994/05/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (163K) -
中島 滋, 松下 至, 二宮 順一郎, 平岡 芳信, 土屋 隆英1994 年 60 巻 3 号 p. 391-392
発行日: 1994/05/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (121K) -
1994 年 60 巻 3 号 p. 432
発行日: 1994年
公開日: 2008/04/21
ジャーナル フリーPDF形式でダウンロード (79K)
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