• Fisheries and Aquatic Sciences
• /
• 제26권12호
• /
• pp.738-751
• /
• 2023

The Sembilan Archipelago is famous for its great biodiversity, in which the humphead wrasse (Cheilinus undulatus) (locally named Napoleon fish) is the primary commodity (economically important), and currently, the environmental degradation occurs due to anthropogenic activities. This study aimed to examine the eco-environmental parameters and assess their influence on the abundance of humphead wrasse and other coral reef fish compositions in the Sembilan Archipelago. Direct field monitoring was performed using a visual census throughout an approximately one km transect. Coral cover data collection and assessment were also carried out. A coastal water quality index (CWQI) was used to assess the water quality status. Furthermore, statistical-based analyses [hierarchical clustering, Pearson's correlation, principal component analysis (PCA), and canonical correspondence analysis (CCA)] were performed to examine the correlation between eco-environmental parameters. The Napoleon fish was only found at stations 1 and 2, with a density of about 3.8 Ind/ha, aligning with the dominant composition of the family Serranidae (covering more than 15% of the total community) and coinciding with the higher coral mortality and lower reef fish abundance. The coral reef conditions were generally ideal for supporting marine life, with a living coral percentage of about > 50% in all stations. Based on CWQI, the study area is categorized as good and excellent water quality. Of the 60 parameter values examined, the phytoplankton abundance, Napoleon fish, and temperature are highly correlated, with a correlation coefficient value greater than 0.7, and statistically significant (F < 0.05). Although the adaptation of reef fish to water quality parameters varies greatly, the most influential parameters in shaping their composition in the study area are living corals, nitrites, ammonia, larval abundance, and temperature.

• 한국항해항만학회지
• /
• 제43권6호
• /
• pp.475-482
• /
• 2019

해양에 대한 인간의 이용과 활동의 증가는 해양오염, 해양생태계 및 서식지 파괴로 이어지고 있다. 이러한 결과, 특히 생애주기가 길고 개체수가 적은 해양동물은 멸종위기에 내몰리고 있는 실정이다. 따라서, 우리나라 정부는 2010년부터 수족관이나 해양박물관과 같이 인공적인 서식장소 11개를 서식지외 보전기관으로 지정하여 멸종위기에 처한 해양생물들을 보전하기 위해 노력하고 있다. 그러나, 해양생물의 보전 서비스를 제공하는 서식지외 보전기관에 대한 중요성과 그 경제적 가치를 추정한 연구는 아직 이루어지지 않고 있다. 따라서 본 연구의 목적은 우리나라 해양동물의 보호와 증식을 위한 관리방안인 서식지외 보전기관의 운영정책에 대한 일반시민들의 정량적 지지도를 추정하는 것이다. 이를 위해 우리나라 푸른바다거북의 보전을 위해 시식지외 보전기관으로 운영되고 국립해양박물관의 해양동물 보전역할에 대한 경제적 가치를 추정하였다. 연구의 결과, 서식지외 보전기관과 같은 비시장재인 공공재에 대한 대표적인 가치추정법인 조건부가치추정법을 적용하여 추정된 서식지외 보전기관(국립해양박물관)의 경제적 가치는 약 418억원에서 최대 약 781억원으로 나타났다. 이러한 본 연구의 결과는 해양동물관리 정책자들에게 우리나라 연안해역에 서식하는 멸종위기에 처한 해양동물의 효율적인 관리방안 수립에 유용한 기초자료로 활용될 수 있을 것이다.

• Fisheries and Aquatic Sciences
• /
• 제27권1호
• /
• pp.48-55
• /
• 2024

The study assessed the utility of mitochondrial DNA for identifying a deceased rorqual discovered off the western coast of India. Both the COI and Cytb genes exhibited remarkable 99-100% similarity with the GenBank sequence of Balaenoptera musculus through a global BLAST search, confirming their affiliation with this species. Inter-species genetic distances for COI and Cytb genes ranged from 6.75% to 9.80% and 7.37% to 10.96% respectively, compared with other Balaenopteridae species. The Bayesian phylogenies constructed based on both COI and Cytb genes demonstrated clear and separate clustering for all Balaenopteridae species, further reaffirming their distinctiveness, while concurrently revealing a cohesive clustering pattern of the generated sequences within the B. musculus clade. Beyond species confirmation, this study provides valuable insights into the presence of live and deceased B. musculus individuals within Indian marine ecosystems. This information holds significant potential for guiding conservation efforts aimed at safeguarding Important Marine Mammal Areas (IMMAs) in India over the long term.

• 해양환경안전학회:학술대회논문집
• /
• 해양환경안전학회 2017년도 추계학술발표회
• /
• pp.72-72
• /
• 2017

• Ocean and Polar Research
• /
• 제36권1호
• /
• pp.25-37
• /
• 2014

To understand the degradation processes of organic matter related to sulfate reduction by Sulfate Reduction Bacteria (SRB) in the tidal flat sediments of Hwang-do and Sogeun-ri, Tae-an Peninsula in Chungnam-do, biogeochemical characteristics were analyzed and highlighted using specific microbial biomarkers. The organic geochemical parameters (TOC, ${\delta}^{13}C_{org}$, C/N ratio, long-chain-n-alkane) indicate that most of the organic matter has been derived from marine phytoplankton and bacteria in the fine-grained sediment of Sogeun-ri, although terrestrial plant components have occasionally been incorporated to a significant degree in the coarse-grained sediment of Hwang-do. The concentration of sulfate in pore water is a constant tendency with regard to depth profile, while methane concentration appears to be slightly different with regard to depth profile at the two sites. Especially, the sum of bacteria fatty acid (a-C15:0 + i-C15:0 + C16:1w5) confirms that the these concentrations in Sogeun-ri are related to the degradation of Benzene, Toluene, Ethylbenzene and Xylene (BTEX) compounds from the crude oil retained in the sediments as a result of the Hebei Spirit oil-spill accident in 2007. The methane-related microbial communities as shown by lipid biomarkers (crocetane, PMI) are larger in some sedimentary sections of Hwang-do than in the Sogeunri tidal flat. These findings suggest that methane production by microbiological processes is clearly governed by SRB activity along the vertical succession in organic-enriched tidal flats.

• 수산해양교육연구
• /
• 제29권1호
• /
• pp.51-63
• /
• 2017

Rice Fields have provided large areas of open water for centuries in regions with a variety of rice-growing cultures, and, in addition to producing rice also provide other animal and/or plant food sources and medicinal plants, thus acting as wetland systems and helping to sustain livelihoods and human well-being in these regions. Also rice fields in many parts of the world support important wetland biodiversity, such as reptiles, amphibians, fish, crustacean, insects and mollusca, and play a significant ole in water-bird flyways and the conservation of water-bird populations. The purpose of this study is to find a way conservation of rice fields in connection with paddies's laws, for example, amend the Conservation of Wetlands Law or legislate for the conservation of paddies.

• Fisheries and Aquatic Sciences
• /
• 제22권8호
• /
• pp.18.1-18.5
• /
• 2019

The development of sex-specific genetic assays in a species provides both a method for identifying the system of sex determination and a valuable tool to address questions of conservation and management importance. In this study, we focused on the identification of single nucleotide polymorphisms (SNPs) that differentiate genetic sex in burbot Lota lota. Burbot are the only true freshwater representative of the cod family and a species of conservation and management importance throughout Eurasia and North America. To identify sex-specific SNPs, we utilized restriction site-associated DNA sequencing (RADseq) to interrogate thousands of SNPs in burbot samples of known phenotypic sex. We discovered 170,569 biallelic SNPs, none of which fit the pattern expected under female heterogamety. However, we identified 22 SNPs that fit the pattern expected under male heterogamety (males heterozygous XY, females fixed XX) and, from these, developed two genetic assays that robustly (~ 97% genotyping success) and accurately (> 99% correct) sexed burbot samples. These sex-specific genetic assays will benefit growing conservation aquaculture programs for this species and allow future assessments of sex-specific migration, growth, and mortality.

• 수산경영론집
• /
• 제34권1호
• /
• pp.137-156
• /
• 2003

Increasingly, leisure time is being used for outdoor recreational activities, and fishing is one of the principal forms of marine recreation. Marine recreational fishing is a popular activity in Korea and this activity has led to the development of a sector of substantial social and economic value. Also it is considered as one of the important outdoor leisure industries in Korea. With rising of income level and development of marine outdoor leisure industries, social, economic demand increase of marine recreational fishing are showing us new advance ability of marine aquatic bio-industry. However the recreational use of fish stocks has become an important consideration in the public and environmental economic analysis of management aspect of fishing, having grown considerably over recent years to reach a level in Korea where the fish stocks and coastal ecosystem has become a significant management problem. we are inevitably facing marine environmental deterioration and overfishing in marine recreational fishing. In this study, not only resources and environmental problems which are occurred by recreational fishers, but also illegal fishing behaviors and other problems such as market's failure are going to analyze basic management theories and methods of recreational fishing through mathematical principals and economic rents which maximize net social benefits. In view of the likelihood of marine recreational fishers adopting high rates of discount, the conservation of fish resources would appear to require continual public surveillance and control of the physical yield and condition of the fish stocks and the optimal use level. The institutional management of recreational fisheries is the way of escaping the collapse of recreational fisheries just like as the situation of management's failure of commercial fisheries worldwide. One of the effective management measure is a license system. In this system, optimal fee is paid by recreational fishers, which prevent them from overfishing, environmental problems to some extents and carry out the optimal number of outings. And money obtained by license fee should be spent for more improvement fishing culture and welfare for marine recreational fishing. Marine recreational fishing is to be promoted under sound conservation and management principles.

• 해양환경안전학회지
• /
• 제15권3호
• /
• pp.237-242
• /
• 2009

최근 육상부존자원의 한계봉착과 신물질개발 및 국제 물류 이동의 증가 등으로 인하여 해양개발수요가 증가하고 있다. 해양에서의 개발행위는 해양생물과 그 서식지에 외부불경제를 유발한다. 이러한 보호와 개발간의 대립을 극복하고 지속가능한 해양이용을 추구하기 위해 고안된 제도가 해양공간계획이다. 본 논문은 해양공간 계획제도가 가지는 효과를 경제적, 생태적, 정책적 측면으로 구분하여 분석하였으며, 우리나라에서 해양공간계획제도의 도입이 필요한 이유를 설명하고 해양공간계획 제도의 성공을 위한 전제조건을 제시하였다.

• 한국환경교육학회지:환경교육
• /
• 제19권1호
• /
• pp.14-29
• /
• 2006

The purpose of this study was to test effect of STS instruction using the subject matter of marine life on middle school students' perception of ocean. The objects of 156 students were sampled from the 1st grade of a middle school and were divided into an experimental group and a control group. 79 students of the control group were treated with traditional instruction, while 77 students of the experimental group were treated with STS instruction materials. All of the students took test of perception of ocean before and after the instructions. The perception of ocean was divided into four categories; value of sea, development of marine resources, research and conservation of sea, and perception of sea-related vocation. The results of the pretest and the posttest indicated that the perception of ocean of the experimental group was statistically significantly higher than that of the control group. Specially in categories of the value of sea and the research and conservation of sea, the scores of the experimental group were significantly higher than those of the control group.