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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean society of Fisheries Technology
Journal Basic Information
Journal DOI :
The Korean Society of Fisheries Technology
Editor in Chief :
Volume & Issues
Volume 50, Issue 4 - Nov 2014
Volume 50, Issue 3 - Aug 2014
Volume 50, Issue 2 - May 2014
Volume 50, Issue 1 - Feb 2014
Selecting the target year
Abundances and feeding habits of Hippocampus coronatus in an eelgrass (Zostera marina) bed of Dongdae Bay, Korea
Huh, Sung-Hoi ; Park, Joo Myun ; Kwak, Seok Nam ; Seong, Bong Jun ;
Journal of the Korean society of Fisheries Technology , volume 50, issue 2, 2014, Pages 115~123
DOI : 10.3796/KSFT.2014.50.2.115
A total of 164 individuals of Hippocampus coronatus were collected from an eelgrass bed in Dongdae Bay, Korea from September 2006 to August 2007. The number of individuals of H. coronatus was higher in September 2006. The size of H. coronatus ranged from 2.4 to 9.3cm in height (Ht), and most of individuals were small size below 5cm (Ht). H. coronatus was a carnivore which consumed mainly gammarid amphipods and copepods. Its diets also included a small amount ofmysids, ostracods, brachiopods, caprellid amphipods, bathynellaceas, isopods, tanaids, and ascothoracids. The diets of H. coronatus underwent size-related changes; smaller individuals consumed copepods, while larger individuals ate gammarid amphipods and mysids. The dietary breadth index of H. coronatus was increased with increasing of their size.
Acoustic observation of the behavior of fish in an artificial reef
Yoon, Eun-A. ; Hwang, Doo-Jin ; Kim, Ho-Sang ; Lee, Seung-Joo ; Lee, Kyung-Seon ;
Journal of the Korean society of Fisheries Technology , volume 50, issue 2, 2014, Pages 124~130
DOI : 10.3796/KSFT.2014.50.2.124
We aimed to assess the behavior characteristics of fish on an artificial reef using hydroacoustic techniques. The acoustical survey was conducted with a 200 kHz dual beam transducer while fishing on the stone combination reef of Uljin. A school of fish were detected on the artificial reef before sunset and floated on the artificial reef at 30 minutes after sunset. The density (Nautical Area Scattering Coefficient, NASC) of fish that floated on the artificial reef after sunset was about
; similar observations (about
or less) were noted after 19:00 hours. Fish caught by fishing on the artificial reef were Sebastes schlegeli, Hexagrammos otakii, Sebastes thompsoni, and Conger myriaster. Resultantly, we demonstrated that hydroacoustic techniques are useful for detecting behavior characteristics of fish in the artificial reef. Such results can be used for basic data to estimate the install effect of the artificial reefs.
Species composition of the demersal fish assemblage in the coastal waters off Geomun island, Korea
Kim, Sin-Gon ; Jang, Choong-Sik ; An, Young-Su ; Koh, Eun-Hye ; Baeck, Gun-Wook ;
Journal of the Korean society of Fisheries Technology , volume 50, issue 2, 2014, Pages 131~138
DOI : 10.3796/KSFT.2014.50.2.131
The study aims at analyzing a species composition of the fish live in bottom of the coastal waters off Geomun island, Korea. To reach the goal of the study, a species composition and it's monthly fluctuation, a monthly fluctuation of the dominant species and it's appearance type was analyzed the fishes caught by the bottom trawl. The result obtained can be summerrized as follows; Fish caught in this area composes 14 orders, 34 families, and 47 species. The largest number of fish species was Perciformes (15 families and 19 species). The most dominant species in an number of fish was jhon dory, Zeus faber which was occupied at 22.5% from the whole number, the second most dominant species was horse mackerel, Trachurus japonicus which was occupied at 21.2%. Four groups were categorized based on appearance time period.
Feeding habits of white croaker, Pennahia argentata in the coastal waters off Sejon island, Korea
Koh, Eun-Hye ; An, Young-Su ; Baeck, Gun-Wook ; Jang, Choong-Sik ;
Journal of the Korean society of Fisheries Technology , volume 50, issue 2, 2014, Pages 139~146
DOI : 10.3796/KSFT.2014.50.2.139
Feeding habits of white croacker, Pennahia argentata, were analyzed by using the stomach contents of 153 specimens caught by bottom trawl from May 2011 to March 2012 in the Sejon island, Korea. To know feeding habits of the white croacker, P. argentata, a species composition and it's fluctuation were analyzed based on growth. White croacker, P. argentata caught in the area composes 15 species. The most species in an number of the prey was Macrura which was occupied at 66.4% from whole prey, the second most species was Pisces which was occupied at 20.3%. The most species in an wet-weight of the prey was Pisces which was 49.3% out of the whole specimens. The second most species was Macrura which was 43.3%. The frequency occurrence of the prey was Macrura which was 68.6%, the next one was Pisces which was 28.8%. The highest Index of Relative Importance (IRI) of the prey was Macrura which was 78.2%, the next one was Pisces which was 28.8%. A number of the prey per specimen of small, middle and large class were 1.3, 1.5, 1.7, respectively. A wet weight of the prey per specimen of small, middle and large class were 0.2, 0.6, 0.2 g, respectively.
An optimal bilge keel design to reduce the rolling of the offshore large purse seiner
Kim, Yong-Jig ; Kang, Il-Kwon ; Park, Byung-Soo ; Ham, Sang-Jun ;
Journal of the Korean society of Fisheries Technology , volume 50, issue 2, 2014, Pages 147~153
DOI : 10.3796/KSFT.2014.50.2.147
The purpose of this paper is to examine the roll damping characteristics by bilge keels on the fishing vessel. Unlike other degree of freedom motions, roll motion is highly nonlinear. However the quantitative evaluation of roll damping combined with waves is very important for the fishing vessel. To reduce roll motion, roll motion stabilizers such as a bilge keel is used due to easy made and cheap cost rather than anti-rolling tank and fin-stabilizer. Authors paid attention to the shape of bilge keel and waves to grasp the roll damping for the fishing vessel and studied about the difference of tendencies of roll angle following the shapes of bilge keel. The model ship was the offshore large purse seiner and four types of bilge keel were used. The data from the experiments were provided and analyzed to investigate the rolling characteristics of the model ship being affected by the wave height, wave period and bilge keel shape. The results of the study showed that three types of the bilge keel have little effective, but only one has an effect on the roll damping. So bilge keel shape and its attachment method need to be a future study for the practical use in fishing vessel.
Maturity and spawning of the giant Pacific octopus, Octopus dofleini in the coast of Gangwondo, East Sea
Lee, Sung Il ; Yang, Jae Hyeong ; Lee, Hae Won ; Kim, Jong Bin ; Cha, Hyung Kee ;
Journal of the Korean society of Fisheries Technology , volume 50, issue 2, 2014, Pages 154~161
DOI : 10.3796/KSFT.2014.50.2.154
Maturity and spawning of the giant Pacific octopus, Octopus dofleini was investigated based on the samples collected in the coast of Gangwondo, East Sea, from January to December in 2009. Individuals of mature stage had a higher occurrence rate from February to May, and gonadosomatic index (GSI) also showed a higher value from February to May than the other months. For that reason, the spawning period was estimated from February to May with the main spawning period from March to May. The total number of eggs in the fecundity (F) ranged from 9,045 in 11.0 kg (TW) to 148,682 in 16.5 kg (TW), which was proportional to total weight (TW), and the relationship between total weight and fecundity was
). The total weight at 50% group maturity (TW0.5) of female was estimated to be 12.2 kg.
An experimental study of the friction and wear on counterpart roughness of silica particle reinforced nano composites
Kim, Hyung Jin ; Lee, Jung-Kyu ; Koh, Sung Wi ;
Journal of the Korean society of Fisheries Technology , volume 50, issue 2, 2014, Pages 162~168
DOI : 10.3796/KSFT.2014.50.2.162
The friction and wear characteristics of the rubber matrix composites filled with nano sized silica particles were investigated at ambient temperature by pin-on-disc friction test. The volume fraction of silica particles was 19%. The cumulative wear volume and wear rate of these materials on counterpart roughness were determined experimentally. The major failure mechanisms were lapping layers, deformation of matrix, ploughing, debonding of particles, fracture of particles and microcracking by scanning electric microscopy photograph of the tested surface. The cumulative wear volume showed a tendency to increase with increase of sliding distance. The wear rate of these composites tested indicated low value as increasing the sliding distance.
Age and growth of rabbit fish, Siganus fuscescens in the coast of Jeju island, Korea
Lee, Seung-Jong ; Kim, Jong-Bin ; Kim, Maeng-Jin ; Jung, Suk-Geun ;
Journal of the Korean society of Fisheries Technology , volume 50, issue 2, 2014, Pages 169~175
DOI : 10.3796/KSFT.2014.50.2.169
The age and growth of rabbit fish, Siganus fuscescens were investigated from samples monthly collected in the coast of Jeju island, Korea from February to December 2012. Ages were determined from annuli in otoliths, and annuli were formed in one or two months immediately after spawning once a year. Also, main spawning period was estimated between July and August, thus rings were considered as annual marks. The von Bertalanffy growth equations estimated from a non-linear regression method were
) for female and
) for male, and the growth between female and male was different.
Estimation of vertical and horizontal spreading force of the towing cage for transporting the live fish by model test and simulation
Park, Subong ; Lee, Chun Woo ;
Journal of the Korean society of Fisheries Technology , volume 50, issue 2, 2014, Pages 176~184
DOI : 10.3796/KSFT.2014.50.2.176
Nowadays, consumption of fisheries products is increasing. There are several factors, one of which is a quantitative development through aquaculture. Another factor is an increase qualitative consumption of fish which require that fish be supplied alive. This requires a lot of technical effort to transport the live fish that have low survival rate (c.f. tuna and mackerel) in coastal waters and in the open sea. To develop a towing cage for transporting the live fish, model test in a circulate water channel and simulation by computer tool were carried out. In order to spread vertically, floats were attached at the upper part of the cage, and iron chains attached at the lower part of the cage. For horizontal spreading, kites were attached on the cage. The tension and spreading performance of the cage were measured. The result shows that the tension and reduction ratio of inside volume of the cage were tended to increase with increased towing speeds. The suitable operation condition in towing cage was 1.0 m/s towing speeds with vertical spreading force 8.7 kN, horizontal spreading force 5.6 kN; in this case the reduction ratio of inside volume of the cage was estimated as 25%.
Collection characteristics of wet-type cyclone with wall cavity for air pollutants removal of marine diesel engines
Yoa, Seok-Jun ; Kwon, Jun-Hyeong ;
Journal of the Korean society of Fisheries Technology , volume 50, issue 2, 2014, Pages 185~192
DOI : 10.3796/KSFT.2014.50.2.185
The main object of this study was to investigate the collection characteristics of wet-type cyclone with wall cavity. The experiment was executed to analyze the characteristics of pressure drop and collection efficiency for the present system with the experimental parameters such as water spray, water spray type, inlet velocity etc. In results, for the present system of wet-type, the pressure drop represented 35 mm
, while in dry-type 33 mm
showing lower 6% at
. In case of
and water spray 200 mL/min, the collection efficiency of the present system became significantly higher as 96.8% comparing to that of the conventional wet-type scrubber. Additionally, for 200 mL/min,
removal efficiencies decreased with the increment of inlet velocity representing 75.0, 62.5, 50.0%, at
Analysis on underwater stability of the octagonal pillar type fish cage and mooring system
Yang, Yong-Su ; Park, Seong-Wook ; Lee, Kyounghoon ; Lee, Dong-Gil ; Jeong, Seong-Jae ; Bae, Jaehyun ;
Journal of the Korean society of Fisheries Technology , volume 50, issue 2, 2014, Pages 193~201
DOI : 10.3796/KSFT.2014.50.2.193
The sea cage in marine aquaculture might be varied such as on the stability and shape in the open sea by environmental factors. To evaluate the stability of net cage structures in the open sea, the physical and numerical modeling techniques were applied and compared with field observations. This study was carried out to analyse the stability and the volume loss which would have an effect on the fish swimming behavior in the octagonal pillar type fish cage under the open sea. As a results, the volume loss ratio of the fish cage as measured using a depth sensor was indicated a value of the 30.3% under the current velocity (1.1m/s). The fish cage should be consisted of a concrete block with a weight over 10 tons, a mooring rope diameter over 28mm PP, and a shackle of 25mm under the current speed of 1m/sec for reasonable stability.
Biological performance evaluation of tubular subsurface cage system for sea cucumber, Apostichopus japonicus, grow-out by in-situ tests
Oh, Moo-Hwan ; Kwon, Inyeong ; Kim, Taeho ;
Journal of the Korean society of Fisheries Technology , volume 50, issue 2, 2014, Pages 202~213
DOI : 10.3796/KSFT.2014.50.2.202
The sea cucumber, Apostichopus japonicus, is becoming an important aquaculture species in China, Japan and Korea. The purpose of this study is to evaluate the biological performance of a tubular type of subsurface cage for sea cucumber grow-out by in-situ tests. The cage structure was constructed of PP (polypropylene) frames and PP tubes (
). A set of tests were conducted at a depth of 15 m near Seosaeng, Ulsan, Korea for 295 days (23 July, 2012 to 13 May, 2013). A total of 155 sea cucumbers were used and fed a mixed diet containing mud, mineral, wheat, fish meal, etc (3% of their body weight). At the end of the experiments, sea cucumber showed a higher survival rate in feed shelter (77.14%) rather than no feed shelter (64.71%). The specific growth rate (SGR) of sea cucumbers in feed condition (0.04%
) was higher than that of no feed culture animals (-0.49%
) during total experimental periods. The result was able to find a no significance difference in survival rate but a significance difference in SGR under feed and no feed treatments.