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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2015.1
- 수록면
- 86 - 93 (8page)
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초록· 키워드
오류제보하기
Anchovy (Engraulis japonicus) is one of the most important species in the South Sea of South Korea. In order to estimate the biomass of anchovy, acoustic surveys, concurrently with trawling, were conducted in April, July, and September of 2013 and February of 2014 off the coast of Tongyeong and Yeosu. However, anchovies were found only during spring (April) and winter (February) surveys. To display only anchovy species confirmed by trawls on empty spaced echograms, virtual echograms were created. Three target strength (TS) values of anchovy were used: TS_z = 20 log L ‒ (20/3) log (1+z/10) ‒ 67.6 (Zhao et al.), TS_y =20 log L ‒ 72.9 (Yoon et al.), TS_f = 20 log L ‒ 71.9 (Foote). For anchovy schools combined with other species e.g., hairtail, squid, and Korean pomfret, their TS values were used to calculate an average TS. As a result, the anchovy biomass in the winter survey was approximately 75,000 tons (TS_z), 90,000 tons (TS_f), 114,000 tons (TS_y), respectively. The biomass in spring was 9,000 tons (TS_z), 9,200 tons (TS_f), 10,000 tons (TS_y). The sampling variance of spring was 70% and of winter was 30%. In order to manage anchovy resource sustainably, larvae and adult anchovy should be separately surveyed, the optimal area, date, and time for acoustic survey should be investigated, and the biomass survey should be done for relatively long and regular base.
목차
등록된 정보가 없습니다.
참고문헌 (22)
참고문헌 신청
Choo HS / 1998 / The effect of variations in the Tsushima warm currents on the egg and larval transport of anchovy in the southern sea of Korea / J Korean Fish Soc 31 : 226 ~
Coetzee J / 2000 / Use of a shoal analysis and patch estimation system (SHAPES) to characterize sardine schools / Aquat Living Resour 13 : 1 ~ 10
Foote KG / 1987 / Fish target strength for use in echo integrator surveys / J Acoust Soc Am 82 (3) : 981 ~ 987
Fujino T / 2010 / Echograms of aquatic organisms observed by a quantitative echosounder around JAPAN : 1 ~ 221
Jolly GM / 1990 / Stratified Random Transect Design for Acoustic Surveys of Fish Stocks / Can J Fish Aquat Sci 47 : 1282 ~ 1291
Coetzee J / 2000 / Use of a shoal analysis and patch estimation system (SHAPES) to characterize sardine schools / Aquat Living Resour 13 : 1 ~ 10
Foote KG / 1987 / Fish target strength for use in echo integrator surveys / J Acoust Soc Am 82 (3) : 981 ~ 987
Fujino T / 2010 / Echograms of aquatic organisms observed by a quantitative echosounder around JAPAN : 1 ~ 221
Jolly GM / 1990 / Stratified Random Transect Design for Acoustic Surveys of Fish Stocks / Can J Fish Aquat Sci 47 : 1282 ~ 1291
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