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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 12, Issue 4 - Dec 1979
Volume 12, Issue 3 - Sep 1979
Volume 12, Issue 2 - Jun 1979
Volume 12, Issue 1 - Mar 1979
Selecting the target year
MODEL EXPERIMENT OF STOW NET
KO Kwan Soh ; KIM Yong Hae ;
Korean Journal of Fisheries and Aquatic Sciences, volume 12, issue 4, 1979, Pages 201~207
The stow net now used in the Yellow Sea, are traditional bag net with the opening held by a lighter upper and a weighted lower beams standing against the current. Such bag net anchored at the bottom are known in many countries, particularly in the estuaries of large rivers, but more rarely in sea fisheries, because they are too much affected by the weather, moreover a permanent strong current is necessary. Some scientists intended to improve this fishing gear, using the shearing devices instead of a lighter upper and a weighted lower beams in order to widen mouth of the stow net however they are unsuccessful. One-fortieth scale model net of the stow net was tested in a circular water tank with an effective volume of
of observing the configuration and tension of the net. Experiments were carried out under the various combination including water velocity, spherical floats and elevating floats with the shearing hoods instead of the upper beam. We found those devices offered a very low resistance per net area to current compared with the spherical floats or upper beam, and had a fairly good shearing power at any velocity and direction of the current. The total resistance (R) of the model net to which shearing hoods and floats are attached can be induced by the following formula under the condition of 0.25m/sec to 0.5m/sec,
The height (h) of the improved model net (m-B) is higher than traditional model net(m-A) with upper and lower beams, m-A: h(cm)=89.22-2.42(V-15).
m-B: h(cm)=89.20-0.78V (V:cm/sec) The catch efficiency of improved model net is 1.5 times traditional model net.
MANOEUVRABILITIES OF THE M.S. 'SAEBADA'
KIM Ki Yun ;
Korean Journal of Fisheries and Aquatic Sciences, volume 12, issue 4, 1979, Pages 209~215
The manoeuvrabilities of a ship are decided by the values of her manoeuvring indices. The manoeuvring indices consist of two kinds: indices K and T. The former decides a ship's turning ability and the latter, the length of time delay to a steady turning motion after her rudder has finished the turn of an ordered angle. In this paper, the author figured out the values of the manoeuvring indices of the m. s. 'SAEBADA' (GT: 2,275,7 ton), the training ship of tile National Fisheries University of Busan through her Z test and analyzed these values and the other data which were obtained from her Z test to study her manoeuvrabilities. The results of]tamed are summarized as follows: 1. The manoeuvring indices K' of the m. s. 'SAEBADA' were
. Her manoeuvring indices
. Her above calculated values K', T' showed that her obeying ability to the turn of her rudder was more increased when her rudder was used to large angle than to small angle, but on the other hand in this case her turning ability was slightly reduced. 2. As it appeared that the calculated K'-values of the m.s. 'SAEBADA' were slightly smaller than the standard K'-values of the fishing boats similar in length, and her overshoot angles at her Z test were greater than other general ships, her turning ability was found to t]e slightly lower. 3. When the m. s. 'SAEBADA' took a turn at her
test, running distance was about 8.6 times her own length and didn't exceed the standard manoeuvrability distance, 5 to 11 times general ships' own length, therefore she was considered to have a good manoeuvrability synthetically.
UNDERWATER NOISE GENERATED BY FISHING GEAR -Stern trawl net-
YOON Gab Dong ;
Korean Journal of Fisheries and Aquatic Sciences, volume 12, issue 4, 1979, Pages 217~224
The main purpose of the present study is to measure the sound spectra of the underwater noises generated by moving trawl net. An underwater recording system was designed to detect underwater noise generated by moving trawl net. The acoustic analysis was made by a heterodyne analyzer (B & K 2010) and level recorder (B & K 2307). The noises generated by the trawl net are appreciably higher (about 10dB) than the background noise in the presence of the fishing vessel. The frequency distribution of underwater noise was DC-6,300 Hz and predominant frequency range was 100-200 Hz, and maximum sound pressure level was
. Sound pressure level recorded at the ground rope was higher than that recorded at the head rope. The sound pressure level meosured in the course of hawling was higher than that measured in the course of towing. When tile net is being casted tile sound pressure level showed the lowest value.
STUDIES ON THE EXTRACTION OF SEAWEED PROTEINS 4. Precipitation Conditions and Nutritional Evaluation of Isolated Seaweed proteins
WOO Soon-Im ; RYU Hong-Soo ; LEE Kang-Ho ;
Korean Journal of Fisheries and Aquatic Sciences, volume 12, issue 4, 1979, Pages 225~234
For the effective utilization of diverse and abundant resource of seaweeds in Korea as a food protein supplment, extraction conditions of water, salt, and alkali soluble proteins were investigated in previous work(Ryu and Lee, 1977: Lee et al., 1977: Lee et al., 1978). The present study as a part of the serial work was thus aimed to find the conditions of isolation and purification of extracted proteins, and to evaluate the nutritional quality of the isolated seaweed proteins in terms of amino acid composition, chemical score, protein score, modified essential amino acid index(MEAAI), and in vitro digestibility presented as pepsin-pancreatin digest residue index (PPDRI). As for the isolation of extracted proteins, TCA treatment was more effective for the proteins from rhodophyceae and Chlorophyceae while the precipitation at isoelectric point was more desirable for Phaeophyceae proteins. In amino acid composition, water soluble protein fraction was superior to the other fractions in Porphyra suborbiculata whereas both water and alkali soluble fractions seemed to bo more benefitial for Enteromorpha linza and Ulva pertusa; the extraction with alcohol-alkali mixed solvent for Undaria pinnatifida and Sargassum fulvellum. Glutamic acid and aspartic acid content was particularly high in all protein fractions examined. The total amino acid content of Porphyra suborbiculata and Enteromorpha linza was almost equivalent to that of dried whole egg although the essential amino acid content was lower. A comparative analysis was made on the inedexes between raw seaweed powder and isolated protein. Chemical score of Porphyra suborbiculata and Ulva pertusa was approximately 35 and 56 in cafes of raw powder and isolated protein respectively while only 10 to 16 for raw powder of Undaria pinnatifida and Sargassum fulvellum and 30 to 35 for their isolated proteins. Protein score of all isolated proteins was in the range of 63 to 73 which indicates that isolated protein would be mere valuable than the fern of raw seaweed powder. Digestibility by means of PPDRI was found to be extremely low in case of raw powder but it could be doubled in case of isolated protein yielding 67 to 70 for Porphyra suborbiculata and Ulva pertusa.
PROCESSING OF DRILL SOLUBLE AND ITS AMINO ACID COMPOSITION
LEE Eung-Ho ; KIM Se-Kwon ; CHO Duck-Jae ; HAN Bong-Ho ;
Korean Journal of Fisheries and Aquatic Sciences, volume 12, issue 4, 1979, Pages 235~240
A study on the amino acid composition of raw frozen krill, and krill solubles manufactured in forms of paste and powder has been carried out. The raw frozen krill was thawed, chopped, mixed and homogenized with same amount of water. The mixture was autolyzed or hydrolyzed by tile addition of
pronase-p, a commercial proteolytic enzyme, to the weight of the raw frozen krill at
for 4 hours. After a thermal inactivation of enzymes at
for 15 minutes, the autolysate and the hydrolysate were centrifuged and filtered through gauzes, respectively, and then tile lipid layer in the supernatant was removed, The autolysate and the hydrolysate were finally concentrated under reduced atmospheric pressure in a rotary vacuum evaporator at
for 1 hour to produce the krill solubles in form of paste. The powdered krill solubles were prepared by the addition of
starch to the autolysate and hydrolysate and by means of concentration in the rotary vacuum evaporator at
for 30 minutes and a forced air drying at
for 3 hours with a air velocity of 3m/sec. Among the amino acids in raw frozen krill, glutamic acid, lysine, and aspartic acid showed high values in quantity and then followed leucine, alanine, arginine, glycine and proline. The qnantity of histidine was very small and that of cystine was only in trace. The krill solubles in forms of paste and powder prepared by autolysis and hydrolysis with pronase-p revealed almost the same patterns in amino acid composition as in raw frozen krill. In case of free amino acids, a large quantity of it in raw frozen krill consisted of lysine, arginine, proline, alanine and leucine. The quantities of cystine, histidine and glutamic acid were, in contrast, very small. In the soluble krill paste prepared by autolysis, lysine, leucine, threonine and alanine existed in large quantities among the free amino acids and cystine, aspartic acid and histidine existed in small quantities. The contents of almost all of the free amino acids ill soluble krill paste perpared by hydrolysis with pronase-p were increased slightly as compared with those in soluble krill paste prepared by autolysis. In this product, the contents of cystine, histidine and serine were very low and lysine, leucine, arginine and proline were the dominant group in quantities among the free amino acids. The krill solubles in forms of paste and powder were not inferior to whole egg in the view point of its essential amino acid composition.
FREE AMINO ACID CONTENT IN THE EXTRACT OF CORAL DAMSELFISH, CHROMIS NOTATUS
HA Jin-Hwan ; LEE Eung-Ho ;
Korean Journal of Fisheries and Aquatic Sciences, volume 12, issue 4, 1979, Pages 241~243
Coral damselfish (demoiselle), Chromis notatus, has been one of the most tasty sea foods in Jeju-Do, Korea, The free amino acids in tile extracts of Chromis notatus were analysed by amino acid autoanalyser. In the extracts, taurine, lysine, glycine and alanine were abundant, holding
of total amino acid content, respectively and followed threonine, glutamic acid and serine, in order. While methionine, histidine, leucine, isoleucine, valine were poor and aspartic acid and proline were trace in content.
CHANGES IN CONTENTS OF AMINES IN THE DARK-FLESHED FISH MEAT DURING PROCESSING AND STORAGE
AHN Cheol-Woo ; CHOI Su-An ; PARK Yeung-Ho ;
Korean Journal of Fisheries and Aquatic Sciences, volume 12, issue 4, 1979, Pages 245~253
Trimethylamine and dimethylamine contents of salted, hot-air dried, sun dried and boiled-dried samples of three commercial fishes, common mackerel, gizzard-shad and sardine, were analyzed and quantitatively compared at two different temperature conditions. The formation of both secondary amines was more rapid at
. And the content of dimethylamine in small sardine was comparatively higher than that in the other samples at both temperatures. Residual amounts of trimethylamine oxide of Halted common mackerel, gizzard-shad and boiled-dried small sardine were relatively higher than those of the other samples. Trimethylamine contents of sun dried samples were relatively higher than in the other samples, while those of boiled-dried small sardine was comparatively lower than those of the others. Dimethylamine content of sun dried samples were higher than those of the other samples, whereas those of boiled-dried small sardine and salted common mackerel were comparatively lower than those of the other samples.
DEPURATION OF LIVE OYSTERS BY CONTROLLING TEMPERATURE, pH AND FREE CHLORINE CONTENT
CHOI Jin-Ho ; KIM Chang-Yang ;
Korean Journal of Fisheries and Aquatic Sciences, volume 12, issue 4, 1979, Pages 255~259
Depuration of extraneous substances such as bottom deposit, feces and coliforms from live oyster has been studied. Coliform accumulation of bottom cultured oysters was much higher than that of raft or long line cultured oysters. When the depuration tank designed in this study was adopted, the depuration rate could be diminished to about
within one hour treatment. Tho most effective conditions of the tank water for depurating live oysters wer
in temperature, 8.80 in pH and below about 2 ppm of residual chlorine concentration.
BACTERIOLOGICAL STUDY ON CULTURED VEGETABLES
CHANG Dong-Suck ; KIM Young-Man ; KIM Young-Goan ;
Korean Journal of Fisheries and Aquatic Sciences, volume 12, issue 4, 1979, Pages 261~266
This experiment was carried out to evaluate the sanitary quality of cultured vegetables and to check the removing rate of bacteria by treating methods such as washing with tap water or commercial detergent, or blanching. Samples collected from farm land located at Busan suburbs and markets were Fragaria chiloensis var. ananasa, Lycopersicum esculentum, Capsium longum, Cucumis sativus, Lactuca scariola var. sativa leaf of Perilla frutescens var, japonica, Oananthe stolonifera and Allium odoium. Fecal coliform MPN was ra god from less than 30 to 430,000 per 100 grams of samples examined while plate count was
per gram. Usually contamination rate of fecal coliform of leaf vegetal)les was much higher than that of fruit vegetables. Removing rate of bacterial density of vegetables by washing three times with tap water was about
in fruit vegetables, about
in leaf vegetables but it was about
in leaf vegetables by washing with a commercial detergent. Sirvival rate of viable cell count of leaf vegetables was less than
after blanching for one minutes in boiling tap water, Composition of coliform was
Escherichia coli group,
Citrobacter freundii group and
Klebsiella aerogenes group, among Escherichia coli, type I being
in total. The coliform detection from BGLB gas positive tubes being planted with various vegetables was about
in the result of IMViC reaction.
EFFECT OF SUYEONG RIVER WATER ON THE WATER POLLUTION OF SUYEONG BAY
WON Jong-Hun ; LEE Bae-Jeong ; SIM Mu-Gyoung ; PARK Heon-Serk ;
Korean Journal of Fisheries and Aquatic Sciences, volume 12, issue 4, 1979, Pages 267~276
This research was conducted to evaluate tile effects of polluted Suyeong River water on the water quality of Kwangan-Ri bathing beach. The quantity of pollutant loading of Suyeong River was determined in January 1979, and the directions of tidal currents and the chemical constituents of the Suyeong Bay water were observed in May 1979. The results are as follows: The quantity of total pollutant loading which was discharged into Suyeong Bay is: BOD 75.2ton/day; COD 96.9ton/day; SS 20.5ton/day; ammonia-nitrogen 12.4ton/day; nitrate-nitrogen 430kg/day; nitrite-nitrogen 85.1kg/day; phosphate-phosphorus 594kg/day and total heavy metals 3.01ton/day. Considering the tidal current, the polluted waters of Suyeong River flow off the Kwangan-Ri beach during tile ebb tides, and flow into the Kwangan Ri beach during the flood tides. Consequently, the water quality of Kangan-Ri bathing beach is not suitable for bathing.
NEW RECORDS OF THREE POLYCHAETOUS ANNELID SPECIES IN KOREA
PARK Eui-In ;
Korean Journal of Fisheries and Aquatic Sciences, volume 12, issue 4, 1979, Pages 277~280
Examining the polychactous annelids collected from Tongyeong Bay and Gwangyang Bay, I found three species which should be added in tile list as new to the polychaetous annelid fauna of Korea. In the present study three species are reported with morphological descriptions. Consquently, a total of 128 species of polychaetous annelids has been reported (Kamita and Sato, 1941; Paik, 1972, 1973a, 1973b; Rho and Song, 1974, 1975: Paik, 1975a, 1975b, 1976: Lee, 1976; Paik 1977, 1978, 1979a,1979b) in Korea.
AMOEBA INFECTION IN OYSTER (CRASSOSTREA GIGAS)
CHUN Seh-Kyu ;
Korean Journal of Fisheries and Aquatic Sciences, volume 12, issue 4, 1979, Pages 281~285
A species of enigmatic amoeba was found front the oysters culcured in Jinhae Bay and the Goje Bay in September-October 1978 and October 1979. Occurrence and the morphological characteristics of the amoeba were studied. Based on their peculiar morphological characters the enigmatic body was a species of parasitic amoeba. The amoebas were morphologically very similar to the amoeboid parasite described by Sawyer(1977). Occurrence of the oysters infected with the amoeboid ranged from zero to
. The infection rate did not show any relations to the depth of water where the oysters were suspended. The longest diameter of the amoeba is
. The thin outer membrane is lightly stained with eosin and PAS positively. Initially one amoeboid was found in an ovum, and later it propagated to 3 to 4 individuals.
OYSTER SETTING IN THE RESTINGA LAGOON IN VENEZUELA
CHO Chang-Hwan ; FRIAS Jose A. ;
Korean Journal of Fisheries and Aquatic Sciences, volume 12, issue 4, 1979, Pages 287~292
NITROGEN EXCRETION IN THE BIVALVE MOLLUSCS
CHIN Pyung ; LEE Bok Kyu ;
Korean Journal of Fisheries and Aquatic Sciences, volume 12, issue 4, 1979, Pages 293~296
The effects of temperature and salinity on tile rates of ammonia and amino nitrogen excretion, and oxygen consumption were measured for Crassostrea gigas. There was variability with temperature and salinity changes in both the rates of nitrogen excretion and the proportionality between ,ammonia and amino acids in the excreta, and also in the rates of oxygen consumption. Rates of nitrogen excretion and oxygen consumption were markedly decreased with increase in salinity, especially at high salinity-high temperature, whereas at low salinity-high temperature condition they were significantly increased. These changes are considered as the responses of physiological tolerances to the high temperature stress and the results of the metabolic temperature compensation at the low salinity-high temperature condition. Most of nitrogenous excretory products was ammonia, and large amounts of amino-nitrogen was excreted, and especially the rate of amino-nitrogen excretion was dominant at
. The amounts of amino-nitrogen excreted by animals were decreased in the medium of high salinity and increased in the medium of low salinity through the experimental temperature. The atomic ratios of oxygen consumed to ammonia-nitrogen excreted (O: N ratio) was low at the low temperature
, and was high at
in the medium of 32.5 and
but low in the low salinity
ON THE MORPHOLOGY OF POST-LARVAL AND YOUNG STAGES OF OMOBRANCHUS ELEGANS(STEINDACHNER)
KIM Yong Uk ;
Korean Journal of Fisheries and Aquatic Sciences, volume 12, issue 4, 1979, Pages 297~303
Early morphological changes of Omobranchus slogans (STEINDACHNER) (Family Blennidae) were studied based on the samples of 125 individuals collected from Changseon channel of Nam-hae in June 1973 and May 1979. Descriptions were made with particular emphasis on developmental changes of supraorbital region, fin rays, development of chromatophores and the preopercular spine. In the early stages the lateral profile of the supraorbital region is perpendicular to tile sagittal plane, however, in the later stages it becomes curved. In the early stage of 5.55 mm in total length the number of soft rays of dorsal fin is 18, and that of the anal fin 15. Ventral fin first appears as a premoidal proturberance. It fully developes into a fin composed of two soft rays in the stages of 12.9 mm in total length. The caudal fin rays first appear in the ventral part and in the stages of 6.15 mm in total length it gets one or two soft rays which bear 1-2 segments. In the later stages each ray bears more than 5 segments. Melanophores first appear as two black spots on the central part of the head. They are distributed on the opercle and the antero-dorsal surface of the trunk in the stage of 18mm in total length. At this stage the general chromatophore. pattern is identical to the adult stage. The anal fin bears melanophores at the basal part of the rays, and it is one of the remarkable morphological characters of this species. In early stages the preopercular spine develops reaching the basal part of the pectoral fin. In the later stages of 15 mm in total length relative length of the spine decreases to total length, and ie reaches only the distal margin of the opercular.