• 수산해양기술연구
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• 제43권4호
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• pp.329-338
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• 2007

Data collected by on-board observers and from experimental surveys during 2004-2006 were analyzed to figure out the status of shark bycatch in Korean tuna longline fishery. Results obtained from 10 surveys indicated that 14, 13 and 1 species of shark were incidentally caught in Korean tuna longline fishery operated in the Pacific, Indian and Atlantic (Mediterranean) Ocean, respectively, and that shark bycatch accounted for about 29-31% of the total catch. Sharks brought aboard were processed in 3 ways; out of 1,127 sharks observed, 575 sharks (51.0%) were discarded after finning, 299 sharks (26.5%) were stored frozen after finning for future use and 253 sharks (22.4%) were released into the sea immediately after caught. The fin to body weight ratio of sharks was estimated to be about 4.7% which is similar to the guideline of 5% established by the international fisheries organizations. The underestimate of shark bycatch in Korean tuna longline fishery was significant because it was general practice that fishermen on-board did not count the discarded shark as a catch.

• 한국어류학회지
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• 제21권sup1호
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• pp.44-51
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• 2009

Greate white sharks, Carcharodon carcharias, are found in almost all the temperate and tropical coastal waters around the world. There have been 19 appearances reported in Korean coastal waters since June 1996 and seven shark attacks have been reported. There are about 400 species of sharks in the world, and 41 species of them have been found in Korean coastal waters. Thirteen of them belong to the Carcharhinidae family, and five of them belong to the Squalidae family. Of these sharks, 15 species of them live off of the East coast, 18 species live off of the West coast, and the other 40 species are distributed around Jeju Island and the South coast. Eleven species of them, including the great white shark, live off of all the coastal waters of Korea.

• 한국수산과학회지
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• 제42권2호
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• pp.157-164
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• 2009

The National Fisheries Research and Development Institute (NFRDI) conducted a circle hook experiment to compare the catch rates of target and bycatch species between J hook and circle hooks in the tuna longline fishery of the Eastern Pacific Ocean, which is located between $9^{\circ}13'S-1^{\circ}36'N$ and $126^{\circ}00'-138^{\circ}21'W$. Sampling was conducted from September 20 to October 23, in 2006. In this survey, we collected shark data to obtain the ratio of fin weight to body weight of sharks. Overall, 413 sharks belonging to 9 species were caught on 62,464 hooks. The total weight of the sharks caught was 11,093 kg. The ratio of wet fin weight to body round weight of sharks by species ranged from 3.7% to 7.7%, while the mean was 5.4%. The total ratio of wet fin weight to the dry fin weight of sharks ranged 0.38 to 0.70 and the mean value was 0.53. The ratio of dry fin weight to the body round weight of the sharks was estimated to be 2.86%.

• 한국어류학회지
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• 제36권1호
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• pp.84-93
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• 2024

우리나라 해역에 서식하는 상어류는 지금까지 9목 21과 32속 47종으로 알려져 있다. 따라서 최근 연구와 우리나라 연근해 상어 출현 기록들을 검토하여 정리하였다. 그 결과, 불범상어과의 상안와골의 마루가 없는 점을 기준으로 불범상어를 기존의 두툽상어과에서 불범상어과로 분리하였다. 이에 따라 불범상어과, 기름상어속, 기름상어와 큰눈환도상어 2종이 추가되어 우리나라 해역의 상어를 총 9목 22과 33속 49종으로 정리하였다. 이들의 종목록과 검색표, 학명변천사를 기록하였으며, Pentanchidae의 국명 신칭은 '불범상어과'로 제안한다.

• 환경영향평가
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• 제18권2호
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• pp.111-122
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• 2009

The impact of Korea's joining the Convention on the Conservation of Migratory Species of Wild Animals(CMS) was analyzed to examine its merits and faults as well as to discuss Korea's opportunities. Results of the analysis based on the agenda and decisions of the Conferences of the Parties, the parties performance, and other committees meetings over the last decades indicated that the affiliation of Korea into the CMS could provide various advantages and opportunities for Korea. First, Korea could upgrade its conservation activities regarding migratory species to the global aspects. Second, Korea could take initiatives for conservation of the migratory species in the Far East Asia. Third, Korea would have a better system in forecasting and problem-solving against the epidermic Avian Influenza through systematic cooperation with the CMS parties and other related international regimes. Finally, Korea will be in a better position to generate statistical data and to develop techniques to reduce the by-catches of the sharks and whales. Korea has already provided a fair and protective institutions for most of the migratory endangered species listed under Appendix I and II of the CMS. This implies that Korea may not require additional major changes to the basic acts and/or legislation. Joining the CMS may negatively impact on the fisheries and related businesses related to whales and sharks around the Ulsan and Pohang provinces. However, the obligation to protect whales and sharks demanded by the CMS is regarded as an acceptable article in Korea according to the analysis of the existing policies and scientific aspects. Nevertheless, if the joining the CMS should generate irreversible hardship for local people's livelihood and cultural aspects, Korea may ask for reservations on particular activities. Overall, we suggest that by joining the CMS, Korea could see various advantages and promotion in national policy.

• 수산해양기술연구
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• 제45권1호
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• pp.22-33
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• 2009

Ecological risk assessment(ERA), developed in Australia, can be used to estimate the risk of target, bycatch and protected species from the effects of fishing using limited data for stock assessment. In this study, we employed the ERA approach to estimate risks to tunas, billfishes, sharks, sea turtles and other species by the Korean tuna longline fishery in the Western and Central Pacific Ocean using productivity and susceptibility analyses of the ERA based on low(<1.30), medium(1.30-1.84) and high risk(>1.84). Albacore, bigeye, yellowfin, skipjack and bluefin tunas were generally evaluated in the medium risk. The susceptibility of tuna species, however, had higher risks than the productivity. Billfishes were also at medium risk, while sharks were at high risk by the tuna longline fishery. The risk of productivity was generally high, because most sharks caught by the tuna longline fishery have high longevities, i.e., over 10 years, including ovoviviparous species. Susceptibility, which is related with the selection of fishing gear, was also high, because the longline fishery has no gear modifications to prevent bycatch of protected species. Not only target tuna species were influenced by the tuna longline fishery in the Western and Central Pacific Ocean, but also nontarget species, such as pomfret, mackerels rays, sea turtle were done. Ecosystem-based fishery assessment tools, such as productivity and susceptibility analysis(PSA), have the ability to provide broad scientific advice to the policy makers and stakeholders.

• 한국수산과학회지
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• 제56권3호
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• pp.309-314
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• 2023

Shark populations are constantly decreasing owing to environmental destruction and overfishing; thus, sharks are now at risk of extinction, with 30.5% of species classified as endangered on the International Union for Conservation of Nature's Red List. Sharks are apex predators and keystone species in balancing the marine food chain; their extinction would create an imbalance in the entire marine ecosystem. Assisted reproductive technology is a last resort for protecting animals facing extinction. Here, as a proactive effort toward building a hormone-induced artificial insemination protocol for endangered wild sharks, we identified the possibility of germ cell maturation by administration of GnRH, a commercially produced synthetic salmon gonadotropin-releasing hormone, and calculated its optimum dosage and injection timing. The experiment was conducted on one shark species, Chiloscyllium plagiosum. Injections were administered in 24 h intervals to C. plagiosum females, and 0.2 mL/kg+0.2 mL/kg were the optimal doses. These doses effectively induced maturation and, and ovulation, and oocyte release. Our results confirm that GnRH is a suitable tool for shark hormone-induced artificial insemination and indicate that this method may facilitate the conservation of endangered shark species.

• 한국어류학회지
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• 제28권2호
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• pp.125-133
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• 2016

전 세계 상어류 (상어구 Selachii)는 약 510종이 유효하고, 우리나라에서는 8목 19과 30속 43종이 보고되었다. 우리나라에 분포하는 상어류 43종 모두가 세계자연보존연맹 적색목록 (IUCN Red List)에 등재되었으며, IUCN 등급별 종 수 및 비율은 위기 (EN) 상태 1종 (2.3%) (vs. 전 세계 15종, 3.2%), 취약 (VU) 11종 (25.6%) (vs. 48종, 10.3%), 준위협 (NT) 10종 (23.3%) (vs. 67종, 14.4%), 관심대상 (LC) 9종 (20.9%) (vs. 115종, 24.7%), 정보부족 (DD) 12종 (27.9%) (vs. 209종, 44.9%)이었으며, 위급 (CR)에 해당하는 종은 전 세계에는 11종 (2.4%)인데 우리나라에 서식하는 종은 없었다. 한반도 해역에 분포하는 상어류 중 멸종우려 (Threatened)에 해당하는 12종과 적색목록 범주와 평가는 다음과 같다: 홍살귀상어 (EN, A2bd+4bd), 고래상어 (VU, A2bd+3d), 돌묵상어 (VU, A2ad+3d), 백상아리 (VU, A2cd+3cd), 청상아리 (VU, A2abd+3bd+4abd), 환도상어 (VU, A2d+4d), 횐배환도상어 (VU, A2bd+3bd+4bd), 흉상어 (VU, A2bd+4bd), 귀상어 (VU, A2bd+3bd+4bd), 곱상어 (VU, A2bd+3bd+4bd), 전자리상어 (VU, A2d+4d), 범수구리 (VU, A2d+4d). 멸종 위기 야생동 식물종 국제교역협약 (CITES) 부속서에 전 세계의 연골어류 중 18종이 등재되었으며, 우리나라 해역에 분포하는 상어류는 고래상어, 돌묵상어, 백상아리, 홍살귀상어, 귀상어 등 5종이 부속서 II에 포함되었다. 북태평양에 분포하는 곱상어의 학명 Squalus acanthias는 S. suckleyi로, 북서태평양의 모조리상어는 S. megalops에서 S. brevirostris로 변경되었다.

• 수산해양교육연구
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• 제26권6호
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• pp.1278-1295
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• 2014

The Sixteenth Meeting of the Conferences of Parties of the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES), which was held in March 2013 in Bangkok, Thailand, listed five shark species and one genus, and uplisted one sawfish species. All new species listings will be come into force of the eighteen months delay, on the fourteenth of September, 2014. The purpose of the delay is to support the preparation of the domestic measures on shark trade by the parties, as there has been no previous experience in trading the commercially exploited aquatic species in the CITES. The CITES Secretary-General has visited several potential shark trade countries to encourage and facilitate the implementation of the new CITES listings. The newly listed sharks have been caught as a target or non-target species by Korean distant water fisheries and introduced into Korea. So the establishment or change of the domestic laws, regulations, and measures for the implementation of the new CITES species must be prepared before the effective entry date. This paper is prepared to assess the effects of the trade of the CITES listed shark species, and to suggest effective government service measures for the management of Korean distant water fisheries. The Ministry of Environment (MOE) is the general Management Authority of the CITES, and the Ministry of Food and Drug Safety (MFDS) is in charge of the medical trade of CITES listed species in Korea. By law, all imported medicines and medical materials must be inspected by the MFDS during the customs examination; this kind of authority sharing is reasonable and effective way of providing government service. Similarly, the designation of new CITES Management Authority for the trade of commercially exploited aquatic CITES species is critical and the Ministry of Oceans and Fisheries (MOF), which is now in charge of the trade of fisheries products, is the most appropriate governing body for this purpose in Korea. The revision of the National Plan of Action for Conservation and Management of Sharks, initially submitted to the Food and Agriculture Organization (FAO) of the United Nations in 2011 as a practical guideline for shark conservation in all Korean fisheries, could be a effective measure to achieve unification of conservation of endangered species and sustainable use of fisheries stocks. The proper CITES measures for the trade of listed species, such as the establishment of the documenting system for Non-detriment Findings, domestic measures suitable for the "Introduction from the Sea" clause, species specific Harmonized System Codes for the customs service, and an effective shark catch data reporting system should be in place prior to the fourteenth of September 2014.

• 한국어업기술학회:학술대회논문집
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• 한국어업기술학회 2000년도 춘계수산관련학회 공동학술대회발표요지집
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• pp.463-464
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• 2000

Skates are one of the most favorite food fishes for Korean people. It is, I think, important to know the biological characteristics of skates for protecting the fishes from the extinction caused by overfishing. Femily Rajidae encompasses about 200 species which is one fourth of elasmobranch fishes, and 11 species known from the Korean waters. But, very few biological characteristics of skates have been known Some of them are shown here and discussed comparing with those of other elasmobranch fishes (sharks and rays) and teleost fishes. (omitted)