著者

深田 耕一 前田 弘 白田 光司

出版者

日本水産學會

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.57, no.9, pp.1697-1701, 1991

---

The data base of digital images of good catch conditions is not sufficient, but that of poor catches is indispensable to apply the vertical distribution of water temperature to fishing information system in order to decide the position of squid jigging in the Japan Sea. The 63 stations yielding less than 200 squids in more than 4 hours consecutive swings were sorted out, as the examples of poor catch conditions among 416 jigging records from 1982 to 1988. In this report, the data base of digital images of poor catches was examined by the group average method of cluster analysis.<br> As for the results, the digital images of poor catches having mutually high similarity were pigeonholed into 15 small groups (=clusters), although there remained 17 independent images, and they were then divided into 2 large groups, which were in relation to the area division in the Japan Sea. Some small clusters consisted of the digital images within the same year, their component images were from one of the two areas and within 30 calendar days. Other clusters consisted of those in the different years, but the individual images in each of them were also from the same area and within 30 calendar days. This tendency is helpful in quasi-real time application of the data base of the fishing information system on board.<br> On the basis of the results, a general flow chart for fishing information system was proposed.

著者

川尻 稔

出版者

The Japanese Society of Fisheries Science

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.15, no.4, pp.166-172, 1949

---

I Studyed on the influence of the population density of Killie-fish (<i>Oryzias latipes</i> T & S) upon the number of spawn eggs, hatching-rate, and consequentry upon the reproduction. In the present study these fishes were cultured a pail (1 ?? and -1 ?? ) 1, 2 and 4 pairs respectively in 3 glass bowls (diameter 30cm, depth 15cm) filled with 7 L. of water, and were given food daily into each groups at the ratio of 1, 2, 4, and the rearing water of each bowl were changed 2-3 times in a week at the same ratio as above. Their spawned eggs were counts 3-4 times every day, and transfered into each 3 glass bottles (capacity 200cc) which filled water at the above ratio also, and disinfected by 0.5% of formalin solution every 4-5 days, and the fry which hatch out were counted every day. These experiments were carryed on two times in the same way.<br> Putting these results together, the number of eggs spawned one female a day decreases, so, accordingly, the number of eggs spawned one female decreases, and besides the hatch-rate have a tendency of depresses, in proportion to the population density of the fishes increases, and by the accumlation of these factors the rate of reproduction of the fish decreases.<br> Satisfied the equation <i>y=ax^b</i>, where <i>y</i> represents the number of eggs spawned per i female a day, or hatching-rate, <i>x</i> density of population, <i>a</i> and <i>b</i> are the characteristic constants.

著者

田子 泰彦

出版者

日本水産學會

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.68, no.4, pp.554-563, 2002-07-15

参考文献数

25

被引用文献数

10 11

---

富山湾湾奥部におけるアユ仔稚魚の主な分布範囲は,距岸3km以内の浅海域であった。庄川および神通川へのアユ稚魚の遡上期間は,河川水温が10℃を越えた4~5月にあった。海域で大型個体の出現が認められたのは,河口付近の水温が10℃に達しない3月下旬~4月中旬迄であった。アユの初期遡上群が大きい理由は,河川水が遡上可能な水温条件になるまで河口付近の海域に滞留を余儀なくされるためと考えられた。河川産の個体は海産よりも同じ体長では体重がより重い傾向を示したことから,特に体長6cm以上の個体は河川へ遡上した方が成長がよくなると推定された。

著者

安田 秀明

出版者

The Japanese Society of Fisheries Science

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.10, no.5, pp.229-230, 1942

著者

大河内 裕之 山根 幸伸 長倉 義智

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.76, no.2, pp.252-253, 2010 (Released:2010-05-13)

被引用文献数

1 1

著者

田中 博之

出版者

The Japanese Society of Fisheries Science

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.60, no.4, pp.533-534, 1994

被引用文献数

1 2

著者

山森 邦夫

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.68, no.6, pp.922-923, 2002-11-15

被引用文献数

2

著者

山中 英明 菊池 武昭 天野 慶之

出版者

日本水産學會

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.43, no.1, pp.115-120, 1977

被引用文献数

6

---

The level of sulfur dioxide in the muscle portion of imported frozen prawn treated with sodium bisulfite ranged from 10 to 30ppm, which was below the permissible residual amount (100ppm) designated in the food additives standard under the Japanese Food Sanitation Law. However, at the same time, 4 to 6ppm of formaldehyde was detected in the muscle.<br> When the Japanese prawn (<i>Penaeus japonicus</i> B_ATE) was dipped in 0.5% solution of sodium bisulfite, 40ppm of sulfur dioxide was recovered in the muscle immediately after the treatment, and 0.6ppm and 1.5ppm of formaldehyde were produced after 2 days of cold storage at 3°C and after 2 months of frozen storage at -20°C respectively, while no formaldehyde was detected in the muscle of the untreated prawn. It may be presumed that formaldehyde was generated from trimethylamine oxide in the muscle of prawn by a non-enzymatic reaction as a result of the treatment with sodium bisulfite.<br> Sulfur dioxide in the muscle and shell of prawn decreased considerably during frozen as well as cold storage.

著者

Attaya Kungsuwan 長島 裕二 野口 玉雄 志田 保夫 Sunee Suvapeepan Panthip Suwansakornkul 橋本 周久

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.53, no.2, pp.261-266, 1987 (Released:2008-02-29)

参考文献数

14

被引用文献数

30 54

---

Further attempts were made to identify the toxins of the horseshoe crab Carcinoscorpius rotundicauda which causes sporadically food poisonings in Thailand. Toxic C. rotundicauda eggs were crushed and extracted with water repeatedly. After being defatted with dichloromethane, the combined extracts were ultrafiltered to cut off more than 1, 000 dalton-substances. Toxic fractions were obtained from the filtrate by column chromatography on Bio-Gel P-2 and Bio-Rex 70. Cellulose acetate strip electrophoresis, TLC, HPLC, and other instrumental analyses demon-strated that the horseshoe crab toxin was essentially composed of tetrodotoxin and related sub-stances, along with paralytic shellfish poisons as minor components.

著者

杉浦 靖夫 木原 正光 杉田 昭夫

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.26, no.6, pp.565-569, 1960 (Released:2008-02-29)

参考文献数

6

---

We set forth already on the ecology of Pinnotheres sinensis found in Tapes japonica. As similar observations were made on the same item of Pinnotheres gordoni found in the same clam, the result is given in the present paper. Pinnotheres gordoni is tolerant for host. It was found in such many bivalves at Kisarazu as Tapes japonica, Mytilus edulis, Ostrea (Crassostrea) gigas, Meretrix lusoria, Mactra veneriformis, Chlamys nipponensis and Umbonium (Suchium) moniliferum(gastropod). The rate of clams with the crab shows some extent of seasonal variation as being it is very low during the season from August to November, in which the water temperature runs from 16°C to 29°C, but is considerably high during the period from December to July in which the water temperature ranging between 10°C and 26°C (Table 1, Fig. 1). It seems to be that Pinnotheres gordoni is somewhat related ecologically to Pinnotheres sinensis, because of these crabs are apt to live in the same host (Table 2). The host, Tapes japonica, suffers a certain amount of harm by the crab in guestion. The rate (W×l00/SW; W=total weight of flesh of the clam; SW=shell weight of it) is 49.8±12.1% in normal clam, but 41.6±12.6% in symbionts.

著者

松田 篤志 西島 敏隆 深見 公雄

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.65, no.5, pp.847-855, 1999-09-15

被引用文献数

3 31

---

A. catenellaの増殖に及ぼす窒素・リン源の影響を調べた。増殖のK_Sは, NO_3-Nで7.7μM, NH_4-Nで3.3μM, PO_4-Pで0.72μMと, 他の赤潮植物プランクトンと比較して高い値であった。μ_<max>は0.47&acd;0.55day^<-1>であった。本藻は, 有機態窒素(尿素およびアミノ酸態窒素のほとんど)を窒素源として増殖に利用できなかった。一方, リン源については有機態リンをはじめ, 種々の形態のリンを利用可能であった。以上から, 本藻は有機態リン濃度の高い富栄養型沿岸域に適応しており, 低無機態窒素・リン濃度下では代表的な赤潮プランクトンよりも優位に増殖する可能性は低いと推察された。

著者

瀬崎 啓次郎 小林 弘

出版者

日本水産學會

雑誌

日本水産學會誌 (ISSN:00215392)

巻号頁・発行日

vol.44, no.8, pp.851-854, 1978-08 (Released:2011-03-05)

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.4, pp.583-589, 1989-04-25 (Released:2008-02-29)

参考文献数

22

被引用文献数

3 5

---

Distinct spawning stocks of herring populations in the Far Eastern waters were examined on their sex ratios, age compositions and initial growth rates.Most populations were the same in regards to their sex ratios, but the Atsuta population showed an unequal ratio suggesting the existence of different ecological properties.Six populations around Hokkaido Island showed lower mean ages but higher growth rates than four northern populations which were 9-11 cm in body length at the first year of life.Variations in the mode of life of ten populations have been classified into the following three ecological types; lake type (spawning in brackish lake and no migration), shore type (spawning in saline shore and narrow migration) and sea type (spawning in shore and extensive migration).Those ecological characteristics seem to be closely associated with dynamics of each population of the herring in the Far Eastern waters.

著者

渡邊 俊 青山 潤 塚本 勝巳

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.81, no.4, pp.639-639, 2015 (Released:2015-08-15)

参考文献数

13

著者

竹谷 裕平 髙津 哲也 山中 智之 柴田 泰宙 中屋 光裕

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

pp.16-00041, (Released:2016-11-25)

参考文献数

22

被引用文献数

2

---

青森県周辺海域におけるキアンコウの背鰭第一棘による年齢査定法を検証した。背鰭第一棘の付け根付近の横断面をエッチング処理した後,メチレンブルーで染色し,実体顕微鏡下で落射光と透過光の両者による比較観察した結果,不透明帯数の読み取り精度が向上した。同横断面には,1年に2本の不透明帯(主に6月と11-12月)が形成されていた。背鰭第一棘による年齢査定は脊椎骨によるものよりも読み取り誤差が小さく,標識放流魚の成長追跡結果と類似したことから,優れた年齢査定法と判定した。

著者

久保 久美子 松本 欣弘 桑原 浩一 岡部 修一 谷山 茂人 橘 勝康 村田 昌一

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.82, no.5, pp.743-752, 2016 (Released:2016-10-06)

参考文献数

24

被引用文献数

4

---

インピーダンス(電気抵抗)を用いて非破壊で鮮魚の脂肪量を推定する機器開発を目指した。周波数には5, 20, 50, 100 kHzを用いた。どの周波数でも死後の経過時間により電気抵抗は変動したが,100 kHzの電気抵抗と脂肪量との相関が高かった。温度変化により電気抵抗の変動を確認し,魚体サイズに応じた電極幅にすることで精度の向上が図られたため,脂肪量推定には魚体温と取上げからの経過時間を統一し,魚体サイズに応じた電極幅にすることで脂肪量を推定できると考えられた。

著者

石原 忠 紀成 尚志 保田 正人

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.40, no.3, pp.309-316, 1974-03-25 (Released:2008-02-29)

参考文献数

17

被引用文献数

2 2

---

The presence of high thiaminase activity in anchovy was reported in the previous paper. It was suggested from the report that continuous feeding of animals with the anchovy may possibly result in vitamin B1 deficiency.In the present experiments, male chickens were fed with a diet containing water extract of anchovy and the effects on growth were studied. For the control, this water extract was boiled for 10 min before feeding.As a result of feeding with the non-boiled extract of anchovy, the amount of B1 in liver and muscle gradually decreased but the amount of pyruvic acid in blood increased. Anorexia and retardation of growth were also observed, and heart rate, respiratory rate and body temperature gradually decreased, resulting finally in typical vitamin B1 deficiency.When 0.5 or 1.0 mg of vitamin B1 was injected daily into the leg muscle of B1 deficient male chickens, they regained their stamina in one or two days.The control group given boiled extract showed favorable growth without any abnormal symptoms.

著者

坪井 潤一 松石 隆 渋谷 和治 高田 芳博 青柳 敏裕 谷沢 弘将 小澤 諒 岡崎 巧

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

pp.16-00039, (Released:2016-10-20)

参考文献数

24

---

西湖で発見されたクニマスは,近縁種であるヒメマスと区別されずに釣獲されている。毎年,解禁から2日間,ビクのぞき調査を行い,鱗による年齢査定,遺伝子解析による種判定を行った。Age-length keyから,体長組成分布を年齢組成に変換した。年齢組成から,平衡状態を仮定して全減少係数Zを推定し,寿命から得られた自然死亡係数を用いて,漁獲係数Fを推定した。総釣獲尾数CとF,Zの関係から資源尾数Nを推定し,クニマスの比率を乗じた結果,クニマス資源量は4,300-11,000尾と概算された。

著者

落合 芳博 渡部 終五 橋本 周久 成田 弘子 浮島 美之 奈良 正人

出版者

日本水産學會

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.50, no.4, pp.721-725, 1984

被引用文献数

6

---

Attempts were made to identify biochemically two gampylid fishes, escolar ("aburasokomutsu") <i>Lepidocybuum Flavobrunneum</i> and castor oil fish ("baramutsu") Ruvettus pretiosus, whose muscles contain a large amount of wax esters and hence may casuse a food poisoning when ingested. Myogen fractions were prepared from the ordinary muscles of both fishes as well as various fishes, and subjected to polyacrylamide gel electrophoresis, followed by staining with Coomassie brilliant bule for protein and with reagents for lactate and malate dehydrogenase activities. Results showed that the protein pattern is species-specific enougy to distinguish the two gempylid fishes from any of the other fishes tested. The pattern of either dehydrogenase was found to be less species-specific. However, simultaneous analyses of MDH and protein patterns faciliated the identification of buth gempylid fishes. Cellulose acetate membrane electrophophoresis was also found to be applicable for this purpose, though less satisfactorily.

著者

小松 正之

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.77, no.5, pp.908-914, 2011 (Released:2011-10-11)

参考文献数

9