著者

道津 喜衛 冨山 一郎

出版者

長崎大学水産学部

雑誌

長崎大学水産学部研究報告 = Bulletin of the Faculty of Fisheries, Nagasaki University (ISSN:05471427)

巻号頁・発行日

vol.23, pp.1-42, 1967-08

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During 1947 to 1967, marine fishes were collected by the authors from Saikai National Park, Nagasaki Prefecture, Western Kyushu. During this period, two main trips were made to this area to investigate the fish-fauna and many other trips to investigate fisheries biolgy as well as the fish-fauna. In this paper, 426 species and 11 sub-species of 143 families of marine fishes collected from the park are described in scientific name as well as in Japanese common name and local name together with the collection-localities. The fish-fauna of the area, facing to the Tsushima Warm Current, a branch of the Kuroshio Current, is similar to that of Wakayama, Kochi and Kagoshima Prefectures on the Pacific coast of Japan facing directly to the Kuroshio Current, and it indicats the characteristics of sub-tropical fish-fauna of South-Eastern Asia.

著者

田村 修 藤木 哲夫 恵藤 国臣

出版者

長崎大学水産学部

雑誌

長崎大学水産学部研究報告 = Bulletin of the Faculty of Fisheries, Nagasaki University (ISSN:05471427)

巻号頁・発行日

vol.12, pp.72-77, 1962-02-28

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We studied on the relation between the amount of extracted blood and the decreasing hematocrit value in specimen of eel (40~65g)and carp(420~650g) (66 and 12 specimen), by the continuous several extractions of 0.5ml each time from the same fish. The decreasing hematocrit values were from 1.3%to 2.5%in eel and from 1.1%to 2.5% in carp in each extraction. The decrease of hematocrit value of all specimen was caused when the total amount of extracted blood came to 1.9, 1.6 and 1.1% (ml/g)in the eel of each body weight (40~65g, 70~95g, 100g<), 0.8% (ml/g) of body weight in the carp. Namely, the reaction of the increase of the evythrocyte counts is presumed to bo unable to occur in such short intervals (2~27 minutes) of the blood-extraction.

著者

水江 一弘 吉田 主基

出版者

長崎大学水産学部

雑誌

長崎大学水産学部研究報告 = Bulletin of the Faculty of Fisheries, Nagasaki University (ISSN:05471427)

巻号頁・発行日

vol.10, pp.38-46, 1961-01-31

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A large number of Tursiops sp. were caught at Arikawa Bay in Goto Is. of Nagasaki pref. In this Tursions sp., the many babies immediatly after the parturition and many females which has large fetus immediatly before the parturition, were included, so it is seemed that this Tursiops sp. is group in the course of the migration of parturition. The body length of the fetus in paturition is presumed about 120 cm. On the body color, the striped dark design in the shape of the anchor was observed at the front of the rear of the head, and in this point it is same characteristic to the Pacific Tursiops sp. About the external proportion of body, in this Tursiops sp. the head part is longer, the portion of the waist and tail is smaller than the northern species of this prefecture, but is similar in these portions to Pacific spp. And the characteristics in this species is that the dorsal fin situates more forward and the breadth of the tail flake is larger than other species. About the skull proportion, the width of the middle snout in maxilla is more narrow and the length of teeth line in maxilla and mandibula is longer and the distance of the end of both temporal is shorter than other Tursiops sp. On the tooth, the distribution of its number is no small, but it has a tendency to much generally. The number of bertebrae was 64, but this value is one animale. About the change of external proportion with the progress of growing, the each values in the head part are decrease and values in the portion of the waist and tail are increase with the progress of growth, it is shown that the degree of the head growth is smaller than the other portions, and the body growth is due to that in the waist and tail mainly.

著者

柴田 恵司

出版者

長崎大学水産学部

雑誌

長崎大学水産学部研究報告 = Bulletin of the Faculty of Fisheries, Nagasaki University (ISSN:05471427)

巻号頁・発行日

no.1, pp.29-32, 1953-02-28

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Using the same data of the first report, the author investigated the fluctuation of "kidai" catch caused each operating factor. 1. Netting direction: Max. on W, min. on NW. Fig. 1 2. Wind direction: Max. on W, min. on NW Fig. 2 3. Weather: Min. at rain, other normal. Fig. 3 4. Wind force: Max. in 3~4 (Beaufort's wind acale) Fig. 4 5. Hauling depth: Max. in 92~100 meters. Fig. 5 6. Bottom state: Max. in sM, min. in M. Fig. 6 7. Max. at daytime and sunset, min. in night. Fig. 7 All these results are siginificant by F-test (a<0.05).

著者

保田 正人 山添 義隆 石原 忠

出版者

長崎大学水産学部

雑誌

長崎大学水産学部研究報告 = Bulletin of the Faculty of Fisheries, Nagasaki University (ISSN:05471427)

巻号頁・発行日

no.18, pp.51-58, 1965-02

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BERGERMAN & ELLIOTのシュウ酸定量法を若干改変した変法により汽水性,淡水性及び回遊性の魚類数種のものの肉質中シュウ酸含量とその経年消長を測定した.併せてシュウ酸含有量の温度の変動による影響について考察し,次の如き結果を得た. 1)ムッゴロウ,ワラスボの如き汽水魚におけるシュウ酸平均含有量の周年消長の様相は極めて良く類似し,両者共8月に最高,3月に最低値を示す. 2)回遊性のアジ,サバについての季節的変動は認められない. 3)魚肉中のシュウ酸含量は極めて少なく栄養学的には問題にならない. 4)棲息環境温度とシュウ酸含量については休眠期を除き正の相関が認められる. 5)魚肉中のシュウ酸含有量は温度による魚類の活動状況に支配される公算が非常に大きく,成熟度には比較的左右されないものと考えられる.

著者

森内 新二 道津 喜衛

出版者

長崎大学水産学部

雑誌

長崎大学水産学部研究報告 = Bulletin of the Faculty of Fisheries, Nagasaki University (ISSN:05471427)

巻号頁・発行日

vol.36, pp.7-12, 1973-12

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Natural egg masses of the sea catfish, Plotosus anguillaris (Lacpede) were collected from the shore of Nomo Bay in Nomosaki (Lat. 32° 35.3' N, Long. 129° 45.5' E). The first egg mass was collected on June 12, 1972. The second and third collections were made on June 2 and July 1, 1973 respectively. The egg masses of the sea catfish were found in the shallow tide pool on the muddy shore during the ebb tide, being deposited in small holes under a vinyl sheet or cement boards probably made by the spawners, and being usually guarded by males. The eggs were spherical in shape measuring from 3.12mm. to 3.50mm. in diameter, non-adhesive and demersal. The egg yolk was considerably large and bright yellow in colour. The rearing and handling of eggs were found very difficult despite the size of egg and hence it was thought indispensable to have the knowledge of incubating habit of the male parent in order to be successful in normal development and hatching of eggs. Hatching was successful only from one egg mass collected on July 1, 1973 which was fortunately fully developed after the eggs were kept in the aquarium for only four days while the other two egg masses still at the early developmental stages were absolutely unsuccessful. The newly hatched out prolarvae, about 6.9 mm. in the total length, could not move to the water surface because of the big yolks and remained at the bottom of the aquarium. It took about 10 days before completing the yolk absorption and attaining the free swimming stage. About 4 days after hatching, the prolarvae began to move crawling along the bottom of the aquarium and gathered themselves at a certain area, showing their instinct of schooling. The rudiment of dendritic appendage of the urogenital papilla appeared already in the newly hatched larvae and it developed into a complicated form in the course of larval development. The postlarvae at the early swimming life stage measuring about 15 mm. in total length, already showed the appearance resembling the adult. From the free swimming stage, the larvae were bred for one month with nauplii of brine shrimp, Artemia salina.

著者

清水 千秋 福原 忠信

出版者

長崎大学水産学部

雑誌

長崎大学水産学部研究報告 = Bulletin of the Faculty of Fisheries, Nagasaki University (ISSN:05471427)

巻号頁・発行日

no.10, pp.25-37, 1961-01-31

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The quantitative compositions of fatty scids in the blubber oils and head oils of Tursiops sp. (Hando Iruka), Pseudorca sp. (Okigondo Kuzira) and Grampus sp. (Hanagondo Kuzira) were determined (Table 7a, 7b and 7c). In this analysis, fatty acids were previously fractionated to the liquid and solid acids by the Urea adduct-MeOH method1) before fractional distillations (Table 2a, 2b and 2c). After the fractional distillations, the number of double bond of the methyl ester of unsaturated fatty acids were estimated by the paper chromatography of their mercuric compounds²). On the fatty acids of their blubber oils, the saturated and unsaturated acids were about 20% and 80% respectively, and about 80% of them are C₁₆, C₁₈ and C₂₀ acids. On the Pseudorca sp. and Grampus sp,, the fatty acids of C₁₆ dominate (about 40%), and on Tursiops sp. the fatty acids of C₁₈ are main part (about 34%). The saturated fatty acids of their head oils are about 75% of Tursiops sp. and Pseudorca sp., but are 52% of Grampus sp., and the unsaturated fatty acids of one double bond are about 20% of the former and about 50% of the latter. The saturated fatty alcohols are about 92% of the unsaponifiable matter and 85% of them is hexadecanol in the head oil of Pseudorca sp. (Table 9).