著者

金 銀好 向井 徹 飯田 浩二

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

2016

被引用文献数

2

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北海道噴火湾周辺海域において,周波数 38, 120, 200 kHz の計量魚群探知機を用いて音響散乱層の特徴を調べ,その構成生物であるオキアミ類とカイアシ類の識別方法を検討した。生物の確認は,直径 80 cm のリングネットによる垂直曳網で行った。オキアミ類とカイアシ類は,周波数 38 kHz よりも 120 kHz と 200 kHz でより強い音響散乱を示し,さらにこれら 2 周波数の SV 差は,オキアミ類で−1.5~1.3 dB,カイアシ類で 2.2-3.7 dB となり,この SV 差を利用して両種を識別する可能性が示された。

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.47, no.1, pp.146a-146a, 1981 (Released:2008-04-22)

著者

本多 直人 松下 吉樹

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.75, no.4, pp.701-703, 2009 (Released:2009-10-09)

参考文献数

18

被引用文献数

4 5

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海中を潜行するエチゼンクラゲをスキューバ潜水により追跡し,深度変化を計測することで,遊泳速力を求めた。傘径 0.6~1.6 m の 14 個体の遊泳速力は,最小 0.07 ms-1,最大 0.17 ms-1 であった。傘径を B とすると,遊泳速力=0.1 B s-1,一拍動あたりの推進距離=0.25 B の関係が求められた。傘径 1~1.5 m の大型個体でも遊泳速力は約 0.1~0.15 ms-1 となるため,対馬暖流の流軸上や強い潮流の中では,流向と逆方向への移動はできないと推測される。また,エチゼンクラゲの遊泳速力は,ほとんどの場合に漁獲対象とする魚類の遊泳速力より小さいと推測される。

著者

倉上 政幹 川名 武

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.5, no.2, pp.93-94, 1936-07-10 (Released:2008-02-29)

被引用文献数

1 1

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The results of age determinations from 1910 to 1930, show that the breeding of Clupea pallasii in Hokkaidô is poor without exception in the year of either maximum or minimum sun-spots and has a peak in each intermediate period, while the 65 years' statistics show that in extreme cases of sun-spots the yearly catch is often unusually rich or poor.

著者

久田 孝 宮本 浩衣 坂尻 誠 安藤 琴美 矢野 俊博

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.67, no.2, pp.296-301, 2001-03-15 (Released:2008-02-01)

参考文献数

13

被引用文献数

8 11

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13の製造元で製造されている魚介糠漬け36製品について調べたところ, 全体的に最優勢菌群は好塩性の乳酸球菌であった。しかし, その菌数は製造元あるいは製品によって大きく異なり, 検出限界以下(<(10)2/g)&acd;(10)7/gであった。好塩性あるいは耐浸透圧性の酵母菌数も製造元あるいは製品によって異なり, 検出限界以下&acd;(10)6/gであった。これら糠漬け試料のうち3製品のみで, 好気性球菌や酵母が乳酸球菌よりも優勢となっていた。糠漬け中の主な有機酸は乳酸であったが, その濃度も0.1&acd;1.7g/100gと製造元や製品によって異なった。揮発性塩基窒素(VBN)は糠漬け中に50&acd;230mg/100gであった。

著者

伊藤 史郎

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.72, no.3, pp.471-475, 2006 (Released:2006-06-07)

参考文献数

14

被引用文献数

1 1

著者

浜崎 活幸

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.72, no.2, pp.241-241, 2006 (Released:2006-03-28)

著者

干川 裕 原 素之

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.78, no.6, pp.1231-1234, 2012 (Released:2012-11-28)

参考文献数

10

被引用文献数

2

著者

高橋 豊美

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.42, no.4, pp.427-436, 1976-04-25 (Released:2008-02-29)

参考文献数

17

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In a previous paper, the size and age composition of the shoals and several biological characteristics of the herring, Clupea pallasi, in the northern part of the Okhotsk Sea in the summer of 1971 were reported. In the present study, the author attempted to clarify the features of the age composition of the shoals and the relationship between their distribution and hydrographic conditions on the surface layer. Fish samples and data of oceanographic observation were obtained by the research vessel“Oyashio Maru”in the northern part of the Okhotsk Sea in the summers of 1971-1973. The surface gill nets usded were composed of nets of various mesh sizes 30, 35, 42, 48, 55, 63, 72, 82mm, and others, and the results of the analysis of these mesh selection curves suggested that these nets can relatively capture herrings non-selec-tively. The results obtained are summarized as follows: 1) The shoals were separated into 3 groups according to the type of their age composition; Shoal A was composed of fish older than 4 years old (3+), Shoal B was mainly composed of 2-3 year-old fish, and Shoal C was mainly composed of 4 year-old fish. 2) Shoal B was distributed in comparative warm waters (12-14°C), where the temperature and salinity gradient were small. 3) Shoal C was observed in only remarkably low salinity areas (27.1-31.2‰), where the discharges of rivers could have some influence. 4) There is a possibility that the extension of the low salinity waters helped to define the distribution of Shoal A. 5) It is deduced that each shoal generally separates from one another geographi-cally due to the distribution of Shoal B and Shoal C in connection with peculiar water masses, respectively.

著者

菅野 泰次

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.48, no.6, pp.755-762, 1982-06-25 (Released:2008-02-29)

参考文献数

26

被引用文献数

1 3

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The population structure of herring in the Okhotsk sea south of 46°N was studied using twenty samples collected from three feeding areas and four spawning areas, and the landings during 13 years in seventeen sections. The relationship of ten samples caught in there feeding areas to spawning stocks were judged by discriminant analysis using VN, γ1, γ2 (see Table 2) as follows: four belong to DeKastri, three belong to Saroma, two mingle in DeKastri, Saroma, Notoro and one belongs to another subpopulation not described above. Four factors which act upon the fluctuation of the landings on seventeen sections were extracted. Two factors had high correlations with the catches of Notoro district and Saroma district. The other two factors had high correlations with each of the landings on two domains in the near side and the far-off side of Hakkaido. From these results, it is assumed that two subpopulations in the Notoro district and Saroma district are independent stocks not mixing with each other being localized in distribution, and a stock in a domain on the near side of Hokkaido is from the DeKastri subpopulation reproduced in the northern Tatal sound.

著者

菅野 泰次

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.55, no.3, pp.441-445, 1989-03-25 (Released:2008-02-29)

参考文献数

17

被引用文献数

1 1

---

Geographic and environmental causes of variations in meristic and morphometric characters were examined for the ten herring populations in the Far Eastern waters. A study of the correlations between the characters of each population and the latitude, salinity and water temperature at the spawning grounds showed that five characters of initial growth, upper gill rakers, lower gill rakers, head length-body length relation and predorsal length-body length relation are closely related to the latitude or water temperature, but showed no relation with the salinity in the spawning grounds.Three factors were extracted by factor analysis for the ten morphological characters in populations. One of them which seems to have no correlation with the three environmental properties examined is the factor suggesting genetic differences between the populations. The variations in morphological characteristics may be associated with each population's ecological, adaptitional and quantitative properties during their evolutional courses in the Pacific Ocean.

著者

浅見 忠彦

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.19, no.4, pp.398-404, 1953 (Released:2008-02-29)

参考文献数

4

被引用文献数

2

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Regular monthly observations as well as those conducted at irregular intervals from 1949 to 1952 inclusive show that the spawning period of sardine and round herring covers November to next April but that of Anchovy extends all year round along the coast of Miyazaki Prefecture. Frequency distribution of ovarian egg diameter of sardine and round herring was found unimo. dal in samples obtained from June to October. But ovary weight of these fishes increase rapidly in November or December when frequency distribution of ovarian egg diameter assumes bimodal or trimodal when examined as before. Anchovy stand also quite different from the other two in ovarian weight and egg diameter, i.e., no precise period of rapid increase of ovary was not found and egg diameter distribution always differs in individuals even taken at the same time and locality.

著者

山森 邦夫 出口 進 前原 栄世 松居 隆

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.58, no.6, pp.1157-1162, 1992 (Released:2008-02-29)

参考文献数

17

被引用文献数

8 14

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Lethal effects of tetrodotoxin (TTX) and saxitoxin (STX) on 6 species of nontoxic marine crabs, as well as effects of the toxins on their nerves, were investigated. There was wide variance among species examined for the lethal effect of TTX and STX. The tolerances of nerves are almost compatible to lethal tolerance with the exception of Hemigrapsus sanguineus. This species showed relatively high resistance to TTX, but its nerve was at almost the same level of tolerance as those of other TTX-sensitive crabs. In order to elucidate the mechanism for high TTX-resis-tance in H. sanguineus, nerve tolerance was measured in the presence of its body fluid. The body fluid reduced the effect of TTX on the nerves, while no effect was observed for STX. It is also con-firmed that pre-injection of the body fluid of H. sanguineus into a mouse was effective to some extent in protecting the mouse from TTX attack.

著者

中村 剛也 本間 隆満 宮原 裕一 花里 孝幸 朴 虎東

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.79, no.5, pp.851-862, 2013 (Released:2013-09-17)

参考文献数

31

被引用文献数

1 1

---

諏訪湖の Microcystis の見かけの比増殖速度や最大現存量に対して湖水回転率が与える影響を 1992 年から 2003 年で調査した。20% day−1 以上に達するようなフラッシング時に加えて対数増殖期の回転率の上昇が 2% day−1 以上に達すると,Microcystis の見かけの比増殖速度は抑制され始めた。6 月から 7 月の回転率が Microcystis の最大現存量に強い影響を与えていることが示唆された。本研究は短期・長期的な湖水回転率が Microcystis に影響を与えていることを示すものである。

著者

堤 裕昭 門谷 茂

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.59, no.8, pp.1343-1347, 1993-08-25 (Released:2008-02-29)

参考文献数

16

被引用文献数

23 23

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We have attempted to promote the decomposition of organic matter deposited on the marine bottom below fish net pen culture by the biological activities of a deposit feeding capitellid polychaete, Capitella sp. 1. The organically enriched sediment was reproduced in the tub in the laboratory by the addition of moist pellets for fish culture on the sediment. We compared the chemical characteristics of the sediments between the experiments with and without Capitella. In these experiments, the Capitella colonies increased rapidly, and the biological activities such as feeding, reworking etc. efficiently decomposed the organic matter added on the sediment. The levels of organic matter of the sediment with Capitella fluctuated stably around the initial level throughout the period of the experiments for 60 days, while the levels in the experiments without Capitella gradually increased. The promotion of organic decomposition of the sediment in the experiments with Capitella also prevented the development of reduced conditions in the sediment. If we can re-establish a dense Capitella population on the bottom below the fish net pen quickly in the environmental recovery process from autumn to winter by releasing artificially cultured colonies of the worms, the potential of organic decomposition on the bottom will be significantly enhanced.

著者

田中 彌太郎

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.19, no.12, pp.1161-1164, 1954-04-25 (Released:2008-02-29)

参考文献数

2

被引用文献数

1

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1. The spawning seasons of Ostrea rivularis and O. gigas were determined by examining their body weight, maturation of gonads and discharge of the reproductive substances. 2. The spawning seasons of these two oysters do not cover well one another. 3. The spawning season of O. rivularis ranges from late May to early September. There are 3 major spawning periods during this season, (a) early June, (b) from late June to early July and (c) from the beginning to the middle of August. 4. O. gigas spawns from early May to early November. During this season there are 4 major periods of spawning; (a) from late May to early June, (b) middle of July, (c) from late August to early September and (d) late September.

著者

笠原 賀代子 西堀 幸吉

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.44, no.4, pp.385-387, 1978-04-25 (Released:2008-02-29)

参考文献数

4

被引用文献数

6 9

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Volatile components of “kusaya” were studied by GLC and GC-MS analyses. Eight acids (acetic, propionic, isobutyric, n-butyric, isovaleric, n-valeric, isocaproic, and n-caproic acid), three bases (TMA, DMA or MMA, and ammonia) and six carbonyls (acetaldehyde, propion-aldehyde, acetone, n-butyraldehyde, methylethylketone, and caproaldehyde) were identified. The aroma of “kusaya” seems to be due to the volatile acids identified, especially to n-butyric acid.

著者

清水 亘 望月 篤 清水 潮 相磯 和嘉

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.33, no.12, pp.1143-1146, 1967-12-25 (Released:2008-02-29)

参考文献数

2

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Kusaya is a special salted-dried fish originated a few hundred years ago in the island of Niizima, off the south coast of Izu Peninsula, Japan. A peculiar feature of the product is long, successive use of its curing brine with occasional addition of concentrated salt solution: some of the brines are said to have been used for more than four hundred years. Although Kusaya (lit. smelt fish) has a strong, fermentation odour, its excellent taste has been much prized by consumers. The chemical analyses of a brine revealed that it contains less than 4% salt and 490mg% volatile basic nitrogen. The pH value of the brine was 7.80. In spite of the low salt concentration of the brine, filleted jackmackerel which had been dipped in the brine for 24 hours showed a marked delay in the development of volatile basic nitrogen during subsequent storage. A mild taste and good texture of the product owing to the low salt concentration would be responsible for the appraised quality of Kusaya. The possibility of the occurrence of special microorganisms which might contribute the preserving effect of the brine was discussed.

著者

小幡 彌太郎 佐々 三郎 谷口 利廣

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.14, no.6, pp.289-291, 1949-04-25 (Released:2008-02-29)

参考文献数

3

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The crystalline lenses of Theragra chalcogramma Pallas (I) and Ommastrephes sloani pacificus Steenstrup (II) were tested as for their value as a sticking matter for ply-wood. The results obtained are as following: The sticking power for the 4 m.m. Max. Min. Average Ply-wood I 28, 0kg/cm2 24, 3kg/cm2 26, 3kg/cm2 II 26, 6 24, 6 25, 6

著者

小幡 彌太郎 佐々 三郎 谷口 利廣

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.14, no.5, pp.251-253, 1949-03-25 (Released:2008-02-29)

参考文献数

1

---

The sticking power of fish-meat for ply-wood was tested with the meat of the following five species of fish: Fresh meat of Squalas sucklegi (Girard) I, Dinogunellus grigorjewi (II), and of Atheresthes evermanni Jordan & Starkes (III), and dry meat of Raiia isotrachys (IV) and of Theragra chalcogramma Pallas (V). The results obtained are as follows: Meat The Sticking Power for the 4 m.m. Ply-wood (Birch tree) max. min. average I 23.6kg/cm2 19.3kg/cm2 21.3kg/cm2 II 26, 6 25.8 26, 2 III 25, 3 25.3 25, 5 IV - - 15.0 V - -22.0