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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Korean Journal of Fisheries and Aquatic Sciences
Journal Basic Information
Journal DOI :
The Korean Society of Fisheries and Aquatic Science
Editor in Chief :
Volume & Issues
Volume 7, Issue 4 - Dec 1974
Volume 7, Issue 3 - Sep 1974
Volume 7, Issue 2 - Jun 1974
Volume 7, Issue 1 - Mar 1974
Selecting the target year
REARING OF THE EARLY STAGE OF THE EEL ANGUILLA JAPONICA
KIM In-Bae ; Jo Jae-Yoon ;
Korean Journal of Fisheries and Aquatic Sciences, volume 7, issue 4, 1974, Pages 179~186
The followings are some results obtained from a series of experiments for the culture of eels from the elver stage in the laboratory from April 1973 to June 1974. 1. The optimum temperature turned out as 30t in the early stage culture. 2. The exponential curve of growth rate for a ten day period at the temperature between
was represented by the following equation:
3. The elvers and small eels that were kept improperly for a long time before this experiment also showed the same growth rate, compared with other healthful eels captured directly from the estuarine areas. 4. Those that showed retarded growth among a group of eels during the culture recovered the normal growth rate if graded out and kept in the other aquarium. 5. Feeding rate was not affected when the content of ammonia was less than 5 ppm, but it decreased by half when the content exceeds 6 ppm. 6, The elimination of fecal stuffs and uneaten dispersed feed was very important for the maintaining the water in quality.
EFFECT OF SOME PESTICIDES TO THE ABILITY OF THE FILTERATION AT EEL CULTURE USING RBCIRCULATING FILTER SYSTEM
KIM In-Bae ; PARK Myeong Ja ;
Korean Journal of Fisheries and Aquatic Sciences, volume 7, issue 4, 1974, Pages 187~194
When rearing fish at recirculating filter systems, some pesticides are often used for controling various fish diseases. In this case, the pesticides are usually applied after stopping the filteration, from a view point of affecting the filtering ability of oxidation and decomposition by killing the decomposing bacteria in the filter system. Therefore, a great inconvenience is usually net. The authors carried out a series of experiments, and the influence of 3 kinds of treatments of pesticides, formalin 33 ppm+matachite green 0.15 ppm, dipterex 0.25 ppm, and furanace 0.1 ppm, to the filtering ability expressed as the consumption rate of dissolved oxygen and depletion of ammonia-nitrogen during the passing time through the filter layer was investigated, and it was found out that these pesticides with above mentioned concentrations which is normally used for controling several kinds of diseases and parasites during the time of eel culture, did not affect the filtering ability. Consequently, it can be said that these pesticides with above mentioned concentrations can he used without stopping filteration.
THE INDIVIDUAL PRODUCTION RATE OF PLECOGLOSSUS ALTIVELIS IN GANGJEONG STREAM, JEJU-DO IN SUMMER
KIM Eul-Bae ;
Korean Journal of Fisheries and Aquatic Sciences, volume 7, issue 4, 1974, Pages 195~203
The individual production rate of Plecoglossus altivelis was studied from the 18th of June to the 25th of September (99 days) 1973, when the fish grow best at Gangjeong Stream, Jeju Do, as one of the ways to find out the reasons why the size of P. altivelis of Jeju Island is smaller than that of other places. The results obtained are as follows : 1) The indivudual production rate of the fish in the Gangjeong Stream during the summer 1973, was estimated as shown in Table 6. 2) The individual production rate of the fish and standing crop of algae on stones in the Gang-jeon Stream were no more than
respectively, when compared with those of the Ukawa River (which is located in Japan), thus the individual production rate of the fish at Gang-jeong Stream being very poor. 3) Population density was 5.2 individuals average per square meter during the research period. This is beyond the estimated density limit, i. e., 4.8 individuals per square meter, for the standing crop of algae on stones. 4) The period that the individual production rate of the fish was the most brisk during the summer in this stream was from August to September in 1973. 5) The poor individual production rate is primarily regarded due to insufficient gross ingestion. The reasons seemed to be insufficeient productivity of algae on the bottom stones, over-population density of the fish, and the lowered activity of ingestion due to low water temperature in daytime as compared with other places. Thus, the production rate of Plecoglossus altivelis in the Gangjeong Stream during the summer was greatly influenced by these factors.
THE RESOURCES OF THE ARK-SHELL, ANADARA BROUGHTONII IN DEUK RYANG BAY
CHOE Kyu Jung ;
Korean Journal of Fisheries and Aquatic Sciences, volume 7, issue 4, 1974, Pages 204~208
The standing crop of the ark-shell, Anadara broughtonii was investigated in the fishing ground near Seodang-Ri, Hoecheon-Myeon, Boseong Gun, Chulla-Nam Do, from the 10 to 17, January 1974, as a preliminary study for the resource investigation of the species. 1. The resources of the ark-shell was estimated to be about 3.4-8.3 M/T, the individual number being about 11,000-37,000 in the area, 113 ha covered for the investigation. 2. Of the landed ark-shell by fishing,
of them were over 3 years old.
THE UTILIZATION OF DIETARY PROTEIN BY YOUNG RAINBOW TROUT
KIM Yong Geun ;
Korean Journal of Fisheries and Aquatic Sciences, volume 7, issue 4, 1974, Pages 209~214
The utilization dietary protein in young rainbow trout was investigated when feeded with the diets of controlled levels of casein and lipids for 12 days. The composition of the diet is shown in Table 1. Body weight gain was in proportion to the protein content in diet up to
, ana the maximum was obtained with
of crude protein (Fig. 1, Table 2). On the other hand, the accumulated protein in body also showed almost maximum value around 40n of protein level in the diet and: the change of accumulated protein showed a little with more-protein level(Fig. 3, Table 9). The protein accumulation rate (protein accumulated/protein consumed) showed its highest value at about
of protein level, while the protein utilization value (protein accumulation rate x protein content of diet) attained its highest value at
of protein level (Table 3). With the above results it is observed that the requirement of dietary protein for young rainbow trout is about
of protein in the diet when casein is used as the sole protein source. In protein efficiency ratio (PER) the lower protein level in the diet, the higher PER yields and the more the quantity of protein increases, the more PER decreases and its relation could be figured out as an equation of y=4.91-0.034x (Fig.4), Nose measured PER utilizing the diet which result of this, it is reported that PER rate of casein dropped within the extent of
protein in diet. The reason why such a different PER rate appeared at the low protein level is revealed as the carbohydrate is low but the lipid high in capacity of utililzing nutrients for rainbow trout. The relation between the protein content of diet and the conversion factor, feed efficiency were determined and the results are shown in Fig. 2.
BIOLOGICAL STUDIES ON THE SAND-EEL, AMMODYTES PERSONATUS GIRARD
CHUN Chan-Il ;
Korean Journal of Fisheries and Aquatic Sciences, volume 7, issue 4, 1974, Pages 215~220
The sand-eel, Ammedytes Personatus is a commercially important fish abounantly found in west and east coast of Korea. Samples were collected from the Baegryeong Island (Yellow Sea), Geoje Island(southern coast) and Jumunjin (East Sea) from May 1973 to December 1974. In this paper the author dealt with some biological point of the fish, especially the relationship between total length ang body weight, and the major spawning season and sex ratio. 1. The major spawning season was confined to the end of November and the end of December at Jumunjin. 2. The sex ratio (male/female) is 0.75 before the main spawning season and increases up to 1.36 after spawning at Jumunjin in 1974. 3. The relationship between the total length (L) and body weight (In were represented as follows:
for the sample from Baegryeong Is.
for the sample from Geoje Is.
for the sample from Jumunjin.
Microbiological and chemical changes in the Pacific oysters, Crassostrea gigas exposed to gamma radiation during ice storage
CHUNG Jong Rak ;
Korean Journal of Fisheries and Aquatic Sciences, volume 7, issue 4, 1974, Pages 221~228
STUDIES ON THE MUSCLES OF MARINE ANIMALS ( I ) CONTENTS OF INORGANIC SUBSTANCES IN THE MUSCLES OF FISH AND SHELLFISH FROM CHEJU ISLAND
HA Bong-Seuk ;
Korean Journal of Fisheries and Aquatic Sciences, volume 7, issue 4, 1974, Pages 229~233
The author studied On the inorganic substances in the muscles of Branchiostegus joponicus japonicus, Chromis notatus, Haliotis gigantea mataka, obtaining the following results ; 1) The results of quantitative analysis are shown in Table 3. 2) It is noticeable that the concentration of Cu, P, Fe, Ca, and Na in the muscles of Branchiostegus joponicus japonicus (demersal fish), Chromis notatus (pelagic fish) and Haliotis gigantea mataka (shell fish) are quite different in the three species.
ELECTRO-CHEMICAL ASPECTS OF STRESS CORROSION OF MILD STEELS ( I )
KIM Suk-Ho ;
Korean Journal of Fisheries and Aquatic Sciences, volume 7, issue 4, 1974, Pages 234~237
Electro-chemical aspects of stress corrosion on the mild steels when immersed in the
solution and charged with 100mV and 100mA were discussed. The main results of the experiment are follows; 1. The weight loss by corrosion was concerned with the applied stress. and the larger the applied stress, the greater the weight loss. 2. Reduction of corrosion stress was a factor of inverse proportion to the applied stress. 3. Corrosion began at first on the parts of impurities concentrated and the grain boundaries, and gradually developed and spreaded out. 4. The materials of unsteady structure deformed of space lattice by the high stress or work-hardening showed less reduction of corrosion stress.