• 수산경영론집
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• 제50권2호
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• pp.57-74
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• 2019

This study is aimed to evaluate the technology levels of shellfish farming in southern coast of Korea and status analysis on research of shellfish aquaculture. With achieving these objectives, it will be possible to present the direction of shellfish farming research and related project. Five major breed of shellfish aquaculture that would be adaptive and sustainable were proposed through consultation and agreement with professional group with more than 15 years of working experience. Moreover also evaluated that levels of technology, industry and market are also evaluated. The evaluation result of the expert group showed that the shellfish farming level occupied the third place in comparison with the US, Japan, Europe, and China. It is estimated that about 13~14 years will reach the level of the highest on average. In addition, most countries are expected to grow by about 10% on average over the next five years. Based on the result of the analysis of 670 research projects (2008~2017), there was little research on climate change and shellfish aquaculture. Besides some of shellfish have not been studied since 2008 and 2013, so it can be mentioned as a future task to be overcome.

• 한국패류학회:학술대회논문집
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• 한국패류학회 1999년도 추계학술발표대회요약집(한국패류학회)
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• pp.12-12
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• 1999

• 한국동물학회:학술대회논문집
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• 한국동물학회 2001년도 한국생물과학협회 학술발표대회
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• pp.130.1-130
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• 2001

No Abstract, See Full Text

• 한국수산과학회지
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• 제41권5호
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• pp.371-380
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• 2008

This study elucidated the floral composition of marine algae and community structure at Hallyeo-haesang National Park, on the southern coast of Korea. In all, 89 species, comprising 10 green, 30 brown and 49 red algae, were identified. The dominant species in terms of importance value were Ulva pertusa, Colpomenia sinuosa, Undaria pinnatifida, Padina arborescens, Hizikia fusiformis, Sargassum sagamianum and Amphiroa dilatata. The vertical distribution of marine vegetation was characterized by Enteromorpha linza - Ulva pertusa - Gelidium divaricatum in the upper intertidal zone, Hizikia fusiformis - Sargassum thunbergii in the middle intertidal zone, and Amphiroa spp. - Hildenbrandtia rubra - Corallina pilulifera in the lower intertidal zone. Functional form group analysis showed that coarsely branched forms comprised 50.3% of the algal community, whereas thick leathery forms, sheet forms and filamentous forms comprised 11.9-13.1%. R/P, C/P and (R+C)/P values were 1.91, 0.74 and 2.64, respectively. A cluster analysis of species occurrence suggested that the number of marine algal species differed greatly among the sampling sites.

• 한국수산과학회지
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• 제51권4호
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• pp.426-434
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• 2018

We investigated temporal and depth-related variation in species composition and abundance of the fish assemblage in the southern East Sea. Fish samples were collected seasonally between 2007 and 2008 using a demersal trawl off the southern coast of Korea. We identified 59 fish species belonging to 41 families. The most frequently occurring species was Coelorinchus multispinulosus, followed by Lophius litulon, Acropoma japonicum and Apogon lineatus. The five most abundant species were A. lineatus, A. japonicum, Myctophum nitidulum, Engraulis japonicus and C. multispinulosus, accounting for 87.04% of the total number of individuals collected. The number of species, abundance and diversity fluctuated with sampling location and time. Permutational multivariate analyses of variance revealed that the assemblage structure was influenced by year, season and water depth, with season being the main indicator. These changes were visually emphasized using non-metric multidimensional scaling ordination plots. Fluctuations in assemblage structure were due to differential contributions of the dominant species.

• 한국수산과학회지
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• 제44권4호
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• pp.366-371
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• 2011

The sea squirt Halocynthia roretzi is mainly cultured in Tongyeong, Southern coastal area of Korea. This study presents the physiological rates of respiration, excretion, feeding and assimilation efficiency of the sea squirt Halocynthia roretzi to analyze the SFG(scope for growth) and net growth efficiency, determined during 2007. Oxygen consumption and nitrogen excretion rates increased with a rise in temperature during the summer period whereas feeding rates decreased. The O:N ratio was high during winter(October to February). Assimilation efficiency showed an annual average of 75.4% during the experimental period, except during a period of elevated temperature in July to September(average $25^{\circ}C$). Net growth efficiency($K_2$) was 8.7 to 64.2% except for May to September, when temperature increased at the aquaculture farm. SFG was negative from May to September, reflecting high temperatures and low feeding rates during this period; its highest positive values occurred during winter.

• 한국해양바이오학회지
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• 제11권2호
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• pp.62-70
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• 2019

We investigated the variation of morphological features, density, biomass and characteristics of reproductive shoot on Zostera marina. This species was monthly monitored and collected during a year in Tongyeong (from January 2016 to December 2016). Morphological features, biomass and density showed significantly seasonal variation (p<0.001). Dimensions of Z. marina were highest in spring and early summer but lowest in winter. Biomass and leaf density of Z. marina showed highest value in May (4,700.5 g w·wt m^-2) and June (858.0 leaves m^-2) respectively and lowest value in November (515.9 g w·wt m^-2 and 312.0 leaves m^-2). Reproductive shoot was monitored from April (13℃) to June (21℃) and grew up to ca. 200 cm. Spathe length, spadix weight, numbers and weight of fruit showed significantly different on monthly. None mature flowers were monitored in April but matured flowers, fruits were founded in May and seed releasing were occurred in June.

• 한국어병학회지
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• 제35권1호
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• pp.1-25
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• 2022

지난 30년간 전세계 양식업은 비약적으로 발전하였다. 양식업은 인간이 요구하는 동물성 단백질 섭취량의 15% 이상을 공급하는 중요한 산업이므로 수요 충족을 위하여 어류와 수산생물의 지속적인 생산 증가가 필요하다. 우리나라 남해안(경남과 전남)에 위치한 어류 가두리양식장 수면적 비율은 전국 대비 약 90%로 어류 양식업의 측면에서는 매우 중요한 곳이다. 그러나 최근의 양식환경은 전지구적 문제인 기후변화에 의한 영향을 점진적으로 받고 있으며, 이러한 영향이 더욱 심화될 것으로 예측되고 있다. 그러므로 지금의 시점에서 기후변화가 우리나라 산업계, 특히 양식산업에 미칠 영향을 정확히 평가하여야 할 시점일 뿐만 아니라 나아가 어업피해를 최소화하기 위한 사회적 및 국가적 전략이 필요하다. 남해안 가두리양식장에서 양식되는 어류의 피해는 해마다 늘어나고 있는데 주요피해의 원인 인자는 기후변화와 직·간접적으로 관련이 있는 고수온, 저수온 및 적조의 발생 등으로 알려져 있다. 현재의 시점에서 지구 온난화는 경제적 한계를 가지는 어종이나 새로운 종에 대한 양식산업화의 기회를 제공할 수 있다. 그러나 이러한 긍정적인 기회의 존재에도 불구하고 새로운 종의 유입에 의한 생태 교란, 적조 등 미세조류의 번식빈도 증가, 질병 발생 기회의 증가, 여름철 고수온 발생 및 기간의 장기화 등 부정적인 문제가 발생하며, 이러한 원인들의 복합적인 영향으로 인해 양식어류의 폐사 규모와 사례가 증가하고 있다. 어류의 폐사 피해의 증가는 양식산업계에 심각한 경제적 영향을 줄 뿐만 아니라 피해 대응과 후속 조치를 위한 사회적 비용 또한 증가하게 된다. 그러므로 어류양식장에서 발생하는 폐사 피해는 원인 인자들에 대한 적극적이고 능동적인 대응으로 줄일 수 있으며, 양식생물의 사육 및 관리기술 향상, 효율적인 먹이 관리, 질병 차단과 능동적 대응, 제도개선 등 다양한 영역에서 이루어져야 한다. 본 총설에서는 우리나라 남해안에 위치한 어류 가두리 양식장에서 발생한 대량폐사 사례를 분석하고 폐사 원인에 대한 대응 능력을 향상시키기 위한 방안을 제시하고자 하였다.

• Ocean and Polar Research
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• 제32권2호
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• pp.123-135
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• 2010

Around Tongyeong coasts which located in southern coast of Korea composed to the complex coastal line and scattered by small islands. It also has been distributed to a complicated bathymetric structure by several types of channels. This study carried to analyze the spatial characteristics of macrobenthic community and benthic environmental variance on sub-tidal area based on multivariate statistics tools. Sediment composition varied from muddy sand to mud, and along the channels, it composed to a heterogeneous bottoms mixed by shell fragment, cobbles and mud. Organic contents on the surface sediment varied 1.1-3.9%. Total of 272 species, $33,349\;ind./m^2$ of macrobenthos identified in all of sample area. Polychaetes also prevailed among the specimen. L. longifolia, P. pinnata dominated based on density. Considering on the biomass, echinoderm S. lacunosa, A. tricoides listed. Closer to the coastal area, the density and diversity were higher. Community structure based on cluster analysis was discriminated into three groups. Each group was also characterized by geographical state such as depth, sediment composition. In addition, when applied to the bathymetric data, the channel, which composed to the mixed sediment, made a role of limited factor which characterized to benthic community. Because the specimen around the channel have been affected on the diverse sediment mixture. Most of benthic studies in the southern coast of Korea focused to the condition of benthic organic pollution spatially, because along the coast, it also developed a aquaculture ground and industrial complex. But, as results, most of the area, it turn out the less polluted areas nevertheless similar environment situation. It supposed that benthic community affect to the bottom sediment composition by physical characteristics.

• 한국수산과학회지
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• 제36권4호
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• pp.365-371
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• 2003

The reared fries of black sea bream, Acanthopagrus schlegeli were released in Gamak Bay and initial adaptation to the environment was evaluated. Thirty thousand fries were marked with magnetic tag, released and recaptured and its stomach content were analysed; the neighboring zooplankton, beuthic algae and other young fishes were investigated. The fries were released on July 30, 2001 in summer season. Water temperature of surface and bottom were $24^{\circ}C\;and\;21^{\circ}C,$ respectively. $Chlorophyll\;\alpha$ content was 4.5 ${\mu}g/L$ with high primary production. Salinity was $32.0-32.5\%_{\circ}.$ Water depth of releasing site was about 30 m. The sea jungle was formed at the first point of releasing and it kept the fries for about 3 days in the bay with plenty of food organisms within 5 m depth. Stomach analysis of the fries revealed that real feeding started from the 15 days after releasing and full feeding took place after the tenth day.