• Korean Journal of Fisheries and Aquatic Sciences
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• v.50 no.6
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• pp.812-817
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• 2017

This study evaluated the effects of dietary inclusion of soybean (SM) and fermented soybean meal (FSM) on growth promotion in juvenile abalone Haliotis discus. Six hundred and thirty juvenile abalone were distributed into nine plastic containers. Three diets were prepared with 22% fish meal, 2% casein, and either 25% SM or FSM used as the protein sources in the experimental diets, and Undaria was used as a control diet to compare the effects of the experimental diets on the growth performance of abalone. The diets were assigned to three containers each and fed to the abalone once daily to satiation for 16 weeks. Weight gain and specific growth rate (SGR) were higher in abalone fed the SM diet than in those fed the FSM diet. Weight gain and SGR of abalone fed the SM and FSM diets were higher than those of abalone fed Undaria. The crude protein and lipid contents of the edible portions of abalone fed the SM and FSM diets were higher than those of abalone fed Undaria. SM was superior to FSM as a protein source in abalone feed. The SM and FSM diets facilitated greater growth than Undaria.

• Fisheries and Aquatic Sciences
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• v.8 no.3
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• pp.138-141
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• 2005

This study was conducted to investigate the effect of partially substituting meat meal for fish meal on the growth and body composition of juvenile olive flounder Paralichthys olivaceus during the winter season. Twenty-five fish (initial body weight, 23 g) were distributed into twelve 250 L flow-through tanks. Four experimental diets were prepared in triplicate: the control, MM20, MM40, and MM60 diets. Sixty percent mackerel meal was used as the primary protein source in the control diet. Meat meal was substituted for 20, 40, and 60$\%$ of the mackerel meal in the MM20, MM40, and MM60 diets, respectively. Survival was not significantly affected by the experimental diets. However, the weight gain and specific growth rate of fish fed the control, MM20, and MM40 diets were significantly higher than those of fish fed the MM60 diet (P<0.05). The feed efficiency ratio of fish fed the control, MM20, and MM40 diets was significantly higher than that of fish fed the MM60 diet (P<0.05). The protein efficiency ratio for fish fed the control diet was significantly higher than that for fish fed the MM40 and MM60 diets (P$\%$ substitution of meat meal for fish meal in the diet could be implemented without a reduction in growth or deterioration of the feed efficiency of juvenile olive flounder during the winter season.

• Journal of Advanced Marine Engineering and Technology
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• v.36 no.1
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• pp.72-77
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• 2012

An alternative fuel is introduced as an environmentally friendly fuel in order to reduce the toxic emissions from conventional fossil fuels. In this study a bio-diesel fuel is produced and applied into the industrial diesel engine to understand the effect on the performance. The test conditions are loads of idle to maximum torque and engine speeds of 700 to 1900 rpm in bio-diesel blending percents of 0, 10, 20%. The results show that smoke and CO emissions are reduced while NOx in slightly increased, and the effects are rather clear in higher loads.

• Bulletin of the Korean Chemical Society
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• v.34 no.6
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• pp.1867-1870
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• 2013

• 한국수산학회:학술대회논문집
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• 2005.05a
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• pp.229-230
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• 2005

• Journal of fish pathology
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• v.23 no.3
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• pp.429-440
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• 2010

We constructed a rock bream (Oplegnathus fasciatus) gill cDNA library and a total of 1450 expressed sequence tag (EST) clones were generated. Gene annotation procedures and homology searches of the sequenced ESTs were locally done by BLASTX for amino acid similarity comparisons. Of the 1450 EST clones, 1022 EST clones showed significant homology to previously described genes while 428 ESTs were unidentified, and 259 clones were hypothetical, or unnamed proteins. Encoding 313 different sequences were identified as putative bio-defense genes or genes associated with immune response.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.54 no.3
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• pp.329-339
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• 2021

The monthly variation in species composition of fishes in the Gujora and Mangchi coastal waters in Geoje, Korea, was investigated between June 2018 and May 2019 through monthly fish collections using a gill net. A total of 46 species, numbering 410 individuals weighing a total of 96,645.0 g, were collected during the study period. The dominant species in terms of numbers were Chelidonichthys spinosus, Stephanolepis cirrhifer, Ditrema temmincki, Sillago japonica, Sebastes inermis, and Paraplagusia japonica. The number and biomass of fishes peaked in July. The peak in species diversity indices occurred in September. The cluster analysis revealed that there were four groups of fishes depending on the season. In addition, subtropical fishes were recorded in the study area, indicating the gradual subtropicalization of the coast of Geoje. Furthermore, the need to understand the changes in marine ecosystems owing to subtropicalization through continuous monitoring is emphasized.

• Journal of Food Hygiene and Safety
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• v.32 no.1
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• pp.70-74
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• 2017

Recently, the area of marine resources has become concerned with sources for the next generation of the bio-industry. Until present, development of the marine resources has remained limited, although a large number of these resources are considered to have potential for various significant biological activities. Most marine sponges, marine algae and coral could be used to create specific compounds for survival against a harsh environment. Therefore, it was necessary that these materials needed to be elucidated with biological activities, such as like anti-inflammatory, anti-viral or anti-cancer effects for their utilization in the bio-industry. In this study, we screened extracts of marine resources for their anti-cancer effect on human colorectal cancer cells. These resources were collected at Kosrae of Micronesia on April, 2013 and extracted with methanol. Cytotoxicity of marine resources was observed. Of a total of 20 specimens, three specimens dose-dependently demonstration inhibition of cell viability. Furthermore, cells treated with these specimens for 48h were induced p53, p21, Bax and caspase-3. The results suggest that they involved p53-mediated apoptosis. Two positive specimens (1304KO-327 and 1304KO-329) were verified as the identical materials, which are Hyrtios sp. Unfortunately 1304KO-207 was not yet classified and needed to identify in the further study. There results suggested that marine resources with positive potential in anticancer effect would be good candidates as useful bio-resources.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.56 no.5
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• pp.651-659
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• 2023

The effect of bio-logger tagging location on blood characteristics and bio-logger attachment efficiency in spotted sea bass (mean body weight 2356.7 g) was investigated. The fish were tagged at four different tagging locations: no-tag (control), operculum attachment (OA), dorsal muscle attachment (DA), and cauda peduncle muscle attachment (CA). The blood properties and bio-logger attachment efficiencies were examined on days 1, 7, 14, and 35 after tagging the bio-logger at each tagging location. During the experimental periods, the concentrations of hematocrit and hemoglobin in whole blood, and GOT (glutamic oxaloacetic transaminase), GPT (glutamic pyruvic transaminase), total protein (TP), glucose, total cholesterol, cortisol, and superoxide dismutase in plasma were not affected by the attachment location of the bio-logger, however, the TP concentration was significantly lower in OA than in the control group on day 7. After tagging for 35 days, the efficiencies of bio-logger attachment in the OA, DA, and CA after tagging for 35 days were 33.3%, 100.0%, and 33.3%, respectively. These results indicate that, in our experimental condition, the most appropriate bio-logger attachment location is DA, providing basic information on bio-logger utilization methods for ecological and biological biotelemetry surveys of the spotted sea bass.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.50 no.5
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• pp.616-620
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• 2017

The feeding habits of post-larval Yatabe blenny Parablennius yatabei (2.0-9.8 mm SL) were examined on the basis of 158 individuals collected from June to October in the coastal waters of eastern Jinhae Bay, South Korea. Based on the index of relative importance (IRI), post-larval P. yatabei fed 94.4% on copepods and 5.6% on tintinnids. The preference of post-larval P. yatabei for copepods to other prey items results from ontogenetic changes. The dietary percentage of copepods increased as fish size increased and tintinnids became less important. The feeding rate of post-larval P. yatabei was consistent at all times of day.