巻号一覧
62 巻 (1996)
- 6 号 p. 857-
- 5 号 p. 723-
- 4 号 p. 547-
- 3 号 p. 347-
- 2 号 p. 189-
- 1 号 p. 3-
62 巻, 6 号
選択された号の論文の20件中1～20を表示しています
- |<
- <
- 1
- >
- >|
-
有瀧 真人, 青海 忠久, 小林 真人1996 年 62 巻 6 号 p. 857-864
発行日: 1996/11/15
公開日: 2008/02/29
ジャーナル フリーBrown sole Pleuronectes herzensteini were reared experimentally to the juvenile stage to determine the influence of rearing temperature and the timing of feeding Artemia Artemia salina nauplii on the occurrence of morphological abnormalities. In one series of experiments, sole larvae were reared at different temperatures (6-24°C) with the same feeding schedules. Rearing temperatures higher than 18°C reduced the appearance of morphological abnormalities. In the second series of experiments, the initial feeding of addition of Artemia nauplii was varied among experimental groups at constant temperature (15°C). The first group to receive Artemia nauplii were at the 4.5-8.0mmTL of sole larvae and the last group did not receive them until metamorphosis. Early feeding of Artemia nauplii reduced morphological abnormalities. Subsequently, mass production techniques were modified to determine if a combination of early feeding of Artemia nauplii to sole larvae (5.5mmTL) and high rearing temperature (18°C) could reduce morphological abnormalities in mass production tanks (20-50m3). These modifications resulted in the highest percentage (56-80%) of normal fish observed during the eleven years of mass seed production of brown sole.抄録全体を表示PDF形式でダウンロード (629K) -
小金 隆之, 塩澤 聡, 有元 操, 水田 洋之介, 塚本 勝巳1996 年 62 巻 6 号 p. 865-871
発行日: 1996/11/15
公開日: 2008/02/29
ジャーナル フリーBehaviors of the striped jack Pseudocaranx dentex to the shade of flotsam were observed in experimental tanks to determine whether or not the shade would act as a factor to trigger association behavior of fishes to a flotsam.
During the daytime, 20 fish of 23cm TL preferred to distribute under the cover which was set on the right half side of a 90m3 outdoor tank, while there was no difference in fish distribution between the right and left sides in a control tank without cover. During the nighttime, however, there was no difference in horizontal distribution between the test and the control tanks. Fish in the test tank tended to distribute at shallower depths than those in the control tank during the daytime, while both fish distributed at the surface during almost all of the nighttime. When the light intensity was increased by more than 10, 000 lx in an outdoor 60m3 tank with a 90×180cm plywood board at the surface, 21 striped jack of 24cm TL distributed in the shade of the plywood board, while they went out of the shade and swam around the tank when the decrease in light intensity exceeded 10, 000 lx. These data suggested that the shade might attract the striped jack and trigger the association behavior. It was also suggested that in marine ranching of the striped jack in coastal waters the feeding station should provide fish with shade to enhance their association behavior and to keep fish at a fixed area in the sea.抄録全体を表示PDF形式でダウンロード (628K) -
吉田 陽一, 中原 紘之, 堀家 健司1996 年 62 巻 6 号 p. 872-877
発行日: 1996/11/15
公開日: 2008/02/29
ジャーナル フリーIn the south basin of Lake Biwa, Phormidium tenue (Cyanophyceae) occurred in great portion sand the tap water had been damaged causing concern about the odor in early June of 1982, 1983, 1987, 1989, and 1990. The relationship between the abundance of P. tenue and water quality in the south basin and the weather condition of Lake Biwa were examined.
The changes of water quality in the south basin of Lake Biwa in early June of 1980-1993 showed that DIN (dissolved inorganic nitrogen) and DIN:DIP (dissolved inorganic phosphorus) ratio were comparatively low and TN (total nitrogen):DIN and TP (total phosphorus):DIP ratios were high in the years when P. tenue occurred abnormaly abundant.
The comparison of each average water quality among the dominant phytoplankton in early June of 1980-1993 showed that P. tenue occurred in the waters with low DIN and DIN:DIP ratio, and high WT (water temperature), TN:DIN and TP:DIP ratios. The species occurred in the years with the weather conditions of high air temperature and solar radiation, and low rain fall (precipitation) from 21 May to 10 June, before it become dominant. These features of P. tenue were remarkably contrac-tive as compared with those of Uroglena americana, with the exception of TP:DIP ratio.抄録全体を表示PDF形式でダウンロード (428K) -
櫻井 泉, 瀬戸 雅文, 中尾 繁1996 年 62 巻 6 号 p. 878-885
発行日: 1996/11/15
公開日: 2008/02/29
ジャーナル フリーThis paper analyzed the effects of water temperature, salinity and particle size of the substratum on the burrowing behaviors of the three Veneroid bivalves, Pseudocardium sachalinensis, Mactra chinensis, and Ruditapes philippinarum. The starting time for burrowing behavior (STBB) and mean burrowing velocity (MBV) of the three bivales in 15-25°C tended to be more rapid than those in 5-1O°C. In 5-10°C, STBB and MBV of P. sachalinensis were the most rapid, and the burying depth of this species in 5-10°C was deeper than that in 15-25°C. In R. philippinarum, the ranges of optimum salinity and particle size for burrowing were wide compared with the other species. It was concluded that the burrowing behaviors of P. sachalinensis and R. philippinarum are well adapted to the dynamic swash conditions in high latitudes and to sites with fresh water, fluctuation of water temperature and low sorting sediment.抄録全体を表示PDF形式でダウンロード (542K) -
四井 敏雄, 前迫 信彦, 吉田 誠1996 年 62 巻 6 号 p. 886-890
発行日: 1996/11/15
公開日: 2008/02/29
ジャーナル フリーThe growth of Hizikia fusiformis (Harvey) Okamura was investigated at Waniura, northern part of the Tsusima Islands, Nagasaki Prefecture, from May 1994 to March 1995. Mature thalli were contained in small polyethylene baskets which fastened on the denuded stones. Embryos liberated from the thalli were allowed to settle on the stones around the baskets. The plants developed from the embryos to reach 95 cm long in late March of the next year, smaller than that of the natural thalli 129 cm long which developed from rhizomes. It became clear that H. fusiformis could reach harvestable length in a year under suitable biological and environmental conditions.抄録全体を表示PDF形式でダウンロード (788K) -
董 仕, 谷口 順彦1996 年 62 巻 6 号 p. 891-896
発行日: 1996/11/15
公開日: 2008/02/29
ジャーナル フリーThe eggs of Ginbuna Carassius langsdorfii (all female triploids) were inseminated by the sperm of a Gengoroubuna Carassius cuvieri and a commom carp Cyprinus carpio respectively. DNA extracted from blood of parents and offsprings were amplified using 20 random primers and separated by electrophoresis (RAPD-PCR). Isozymes of muscle and liver of parents and offsprings were assayed by the horizontal starch gel electrophoresis. Distinct differences by maternal fish were observed in the patterns of both RAPD-PCR (17 primers) and isozymes (CK, EST, GPI, PGM), but those of offsprings produced by crossing with Gengoroubuna and common carp respectively were the same completely within the maternal fish. Therefore, the results obtained in this study verified that the offsprings from Ginbuna were clonal genetically, being the same with maternal fish throughout the genome.抄録全体を表示PDF形式でダウンロード (1355K) -
吉村 研治, 大森 庸子, 吉松 隆夫, 田中 賢二, 石崎 文彬1996 年 62 巻 6 号 p. 897-903
発行日: 1996/11/15
公開日: 2008/02/29
ジャーナル フリーIn a high density culture of rotifer (beyond the levels of 103ind./ml), the amount of aeration needed to maintain an optimum dissolved oxygen (DO) level increases. In order to investigate the effect of aeration on the population growth of rotifer, a series of experiments were carried out. The S-type rotifer Brachionus rotundiformis was cultured at high density using 10l vessels under different aeration conditions. Air or oxygen gas was introduced into the culture media through two types of sparger which formed different sizes of bubbles, at aeration rates from 0.1 to 2.0vvm. The bubble-size from the two kinds of sparger were estimated from the value of KLa (volumetric oxygen transfer coefficient). When the aeration rate was high or the ceramic sparger that formed smaller bubbles was used, DO in the culture system remained at a high level. However, under these conditions, the growth of the rotifer population was seriously inhibited due to very high aeration rates and small bubbles, possibly as a result of foaming separation. When oxygen gas was introduced into the culture system, the density of rotifer was higher than that when air was introduced. Therefore, it is recommended to introduce high-purity oxygen gas for a high density culture to avoid any growth inhibition and to maintain optimum DO.抄録全体を表示PDF形式でダウンロード (478K) -
陳 〓, 矢田 貞美1996 年 62 巻 6 号 p. 904-910
発行日: 1996/11/15
公開日: 2008/02/29
ジャーナル フリーA separative roll-type mechanism installed between an automatic fish selector and counting system was devised. The separative state of overlapping fish body was investigated by controlling the peripheral velocity of the first roll on the supply side, and the ratio of peripheral velocities of neighboring rolls, by adjusting the angle of inclination of the line connecting the centers of rolls parallel to each other and the interval distance between neighbor rolls, by controlling the ratio of overlapping fishes body length, and from the relationship between the distance of partitive boards and fish body width. The results were as follows.
1. When the ratio of peripheral velocity of neighboring the rolls was 1.00, the peripheral velocity of the first roll was 0.8m/s, and the ratio of overlapping fishes body length was 75%, overlapping fry were perfectly separated.
2. When the ratio of peripheral velocity of neighboring rolls was 1.26 and the ratio of overlapping fishes body length was 75%, the separation of overlapping fishes body was not affected by the peripheral velocity of the first roll on the supply side, and the counting error of fry numbers was zero.抄録全体を表示PDF形式でダウンロード (515K) -
谷野 章, 佐藤 敦, 宮田 忠明, 水谷 圭朗, 榊 陽, 北村 章二, 生田 和正, 小倉 未基1996 年 62 巻 6 号 p. 911-919
発行日: 1996/11/15
公開日: 2008/02/29
ジャーナル フリーJuvenile and mature hime salmon were tested for their magnetic sensitivity using a successive conditioning. Fifty juvenile fish were reinforced according to concurrent changes of intensity, direction, and inclination of the magnetic field as a conditioned stimulus and an electric shock as an unconditioned stimulus. Twenty mature fish were reinforced according to an alternative magnetic field which rotates the horizontal component of the magnetic field in the tank through 120°at 1Hz. The intensity of the total magnetic field in the tank was also changed from 0.56 to 0.80 gauss. Cumulative number of training reached 300 times for juvenile fish and 600 times for mature fish. No statistically significant conditioned reflex was observed in either juvenile or mature fish. However, the other fifty juvenile fish and twenty mature fish were successfully conditioned by lighting stimulus (100 ?? 130lx for juvenile fish and 20 ?? 25lx for mature fish) instead of the magnetic stimulus. These results indicate that hime salmon may not have magnetic sensitivity.抄録全体を表示PDF形式でダウンロード (609K) -
朴 倉斗, 松田 皎, 胡 夫祥1996 年 62 巻 6 号 p. 920-927
発行日: 1996/11/15
公開日: 2008/02/29
ジャーナル フリーThis paper describes the effects of dihedral angles (Γ) and sweepback angles (Λ) on the lift and drag characteristics of the cambered otter boards in free stream or near the bottom. Seven types of otter board model cambered plates (aspect ratio λ=1.5, camber ratio CR=15%) with different dihedral and sweepback angles were tested in a circulating water tank. The effects of dihedral angle on lift and drag of the cambered plates in free stream and near the bottom were very small. However, the maximum lift coefficient of the cambered plates with sweepback angle Λ=20° in free stream and Λ=10° near the bottom were about 9% and 5% larger than that of the cambered plate without sweepback angle, respectively.抄録全体を表示PDF形式でダウンロード (486K) -
吉村 彩子, 吉川 光一, 北爪 博彦1996 年 62 巻 6 号 p. 928-933
発行日: 1996/11/15
公開日: 2008/02/29
ジャーナル フリーThe recoveries of iodine in L-Na-thyroxinate were determined by an ashing method at 200-550°C, using three kinds of crucibles. Also the effect of the aqueous extract of “Kombu” Laminaria japonica and the artificial “Kombu” extracts on the recovery of iodine were estimated.
The highest value of recovery of iodine was obtained by ashing used in a platinum crucible with alkali at 400°C.
Except ashing at 400°C, increasing of ashing time showed a decrease of recoveries. When “Kombu” extract was added to the sample, the recovery of iodine increased remarkably.
It will the effect of the mixture of Ca-alginate, mannite and several inorganic element cortained in the aqueous “Kombu” extract.抄録全体を表示PDF形式でダウンロード (417K) -
山下 倫明, 逸見 光, 上田 智広, 小原 貢, 田老 孝則, 西岡 不二男, 小長谷 史郎1996 年 62 巻 6 号 p. 934-938
発行日: 1996/11/15
公開日: 2008/02/29
ジャーナル フリーThe meat of matured chum salmon caught by the coastal set-net fishery tends to soften to a great extend when the fish is frozen-thawed, during ice-storage or in the course of processing. Recently, it was clarified that the softening phenomenon of the meat is due to the enhanced cathepsin activity in the muscle tissue. This study was undertaken to increase the use of salmons in such condition by processing them into frozen-surimi. However, there is a possibility that the gel of the surimi undergoes marked deterioration in the course of the heating (cooking) process by protease action. Therefore, first of all, the relationship between the gel forming ability and the degree of protease activity in the minced meat prepared from matured salmon was examined. A close relation was observed between them, i.e. the stronger the protease activity, the lower the gel-strength of the final product. SDS-PAGE analysis revealed the occurrence of degradation in myofibrillar proteins during the heating process. Next, the use of a protease inhibitor was examined to prevent gel-degradation. A crude inhibitor (cystatin and/or cystatin-like inhibitor) preparation from salmon testis which so far almost useless, and similar preparations from bovine serum and chicken egg white were found to be very effective in preventing gel-degradation.抄録全体を表示PDF形式でダウンロード (1812K) -
佐藤 洋大, 二宮 学, 川合 研児, 楠田 理一1996 年 62 巻 6 号 p. 939-940
発行日: 1996/11/15
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (144K) -
野口 玉雄, 宮澤 啓輔, 松居 隆, 山森 邦夫, 塩見 一雄1996 年 62 巻 6 号 p. 941
発行日: 1996/11/15
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (61K) -
赤枝 宏, 野口 玉雄1996 年 62 巻 6 号 p. 942-943
発行日: 1996/11/15
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (155K) -
錢 重均, 野口 玉雄1996 年 62 巻 6 号 p. 944-945
発行日: 1996/11/15
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) -
多部田 修1996 年 62 巻 6 号 p. 946-947
発行日: 1996/11/15
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (159K) -
山森 邦夫1996 年 62 巻 6 号 p. 948-949
発行日: 1996/11/15
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (158K) -
塩見 一雄1996 年 62 巻 6 号 p. 950-951
発行日: 1996/11/15
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (160K) -
1996 年 62 巻 6 号 p. 980
発行日: 1996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 (16K)
- |<
- <
- 1
- >
- >|