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안두해,문대연,고정락,조규대,박영철,AN Doo-Hae,MOON Dae-Yeon,KOH Jeong-Rack,CHO Kyu-Dae,PARK Yeong-Chull 한국수산과학회 2003 한국수산과학회지 Vol.36 No.4
This paper describes the relationship between the distribution of tuna and ENSO events in the Pacific Ocean which have occurred on a regular basis of 3-5 year terms. Annual catches and catch ratios of skipjack Funa, Katswonus pelamis and yellowfin tuna, Thunnus albacares largely increased during El $Ni\~{n}o$ years, while it decreased during La $Ni\~{n}a$ years. However, the effect of El $Ni\~{n}o$ on the distribution of tuna seemed to be more significant to yellowfin tuna which usually occurr the upper thermocline depth increases due to the elevated thermocline in the Western and Central Pacific Ocean.
한국 연근해 황아귀 Lophius litulon (Jordan)의 자원평가 및 관리방안 연구
박영철,이재봉,최석관,안두해 한국수산자원학회 2003 한국수산자원학회지 Vol.6 No.-
본 연구에서는 1985년부터 2001년까지 17년간의 황아귀 어획량 및 노력량 자료와 어획물 체장조사 자료를 이용하여 한국 연근해 황아귀 자원에 대한 자원생물학적특정치를 추정하였다. 어획물곡선을 이용하여 추전된 한국 연근해 황아귀의 순간전 사망계수 (Z)는 0.91/년이며, 어구가입연령 (t_(c))은 1.3세였다. 또한, 자연사망계수 (M)는 0.27/년으로, 순간어획사망계수 (F)는 0.64/년으로, 어장가입연렁(t_(r))은 0.3세로 추정되었다. 황아귀 자원을 가입당생산량 모델에 적용시킨 결과, 가능한 최대 가입당생산량이 948g 임에 비하여 현재의 t_(c) = 1.3세, F = 0.64/년에서의 가입당생산량은 559g 정도로 나타났다. 여기서 t_(c)를 현재 상태로 고정시킨 후, 가입당생산량을 높이는 방안을 생각해 보면, 현재의 F 값 0.64/년에서 증가할수록 가입당생산량은 감소하는 경향을 보이고 있지만, 현재의 어획강도 (F)를 고정시키는 경우에는 t_(c)를 현재의 1.3세에서 4세 부근으로 조정하면 최대의 가입당생산량(948g)을 얻을 수있고, 이 t_(c)값은 역시 F_(0.1)방법에서 추정된 적정 어획체장음 연력으로 환산한 결과와 거의 일치하였다. 또한, 가입당생산량 및 가입당산란자원량 모델을 이용하여 생물학적 관리기준점이 되는 F_(0.1)과 F_(35%) 및 F_(40%)을 각각 0.14/년, 0.26/년, 0.22/년으로 설정하였다. 지난 17년간 어획자료를 사용하여 잉여생산모델에 의해 추정된 MSY는 Schaefer와 Fox 모델에 의하여 각각 7.740톤과 7.720톤으로 유사한 결과를 나타냈다. 또한, CPUE/CPUE_(M8Y) 비는 1보다 큰 값을 보여 황아귀의 자원상태는 한국 TAC 산정을 위한 ABC 추정시스템의 4a 단계에 해당되었다. 따라서, MSY 및 자원상태를 고려하여 한국 연근해 황아귀 자원의 2002년도 관리시점의 생물학적허용어획량은 7,730톤이 적정한 것으로 판단되었다. The purpose of this study is to estimate population ecological parameters, including instantaneous coefficients of natural and fishing mortalities, and age at first capture, as well as to carry out stock assessment of yellow goosefish Lophius litulon (Jordan) in Korean wafers. Using the catch curve, the instantaneous coefficient of total mortality (Z) of yellow goosefish was estimated at 0.91/year and the age at first capture. 1.3 years. The instantaneous coefficients of natural and fishing mortalities (M and F) were estimated to be 0.27/year and 0.64/year, respectively. A yield-per-recruit (YPR) analysis showed that the current yield per recruit of about 559 g with F of 0.64/year at t_(c) of 1.3 years. was lower than the possible maximum yield per recruit of 948 g. With to fixed at the current level, the yield per recruit tended to decrease as the current F (0.64/year) value increased. Thus, it is suggested that the maximum yield per recruit can be attained with a fixed F value at the current level by increasing t_(c) from 1.3 rears to 4.0 years. Based on YPR and spawning biomass per recruit (SPR) models, the biolegical reference points, such as F_(0.1), F_(35%), F_(40%), were suggested as 0.14, 0.26, 0.22 per year at current age 1 of recruitment. Employing surplus production model (SPM) with catch per unit effort of the Korean large stow net fishery during the periods of 1985-2001, the estimated MBYs were similar between the Schaefer and Fox models, ranged from 7,74D to 7,720 mt. Finally, we suggested that acceptable biological catch (ABC) of yellow goosefish in 2002 should be 7,730 mt, based on the MSY and the current status of the stock in Korean waters.
한국 연근해 황아귀 , Lophius litulon (Jordan) 의 성숙과 산란
박영철,차형기,차병열 한국수산자원학회 1999 한국수산자원학회지 Vol.2 No.-
Maturation and spawing of the yellow goosefish, Lophius litulon was investigated based on the samples captured in Korean waters from January 1994 to June 1997. Gonadosomatic index began to increase in January, and reached maximum between February and April. After spawing it began to decrease from May. Fecundity was directly proportional to the size of the female, with the clutch size varying from 369,570 eggs in the smallest female(TL=52.25cm)to 1,874,560 eggs in the largest (TL=90.25cm), and the matured eggs ranged from 600 ㎛ to 800㎛ in diameter. Total length and age at maturity were substantially different between sexes, which were 48.5cm and 3.5 years for females and 34.7cm and 2.3 years for males. Annual reproductive cycles of this species could be divided into six successive stages : immature stage, nucleolus stage, yolk vesicle stage, vitellgenic stage, ripe stage and spent stage. Sex ratio (♀:♂) was 62:38 on average but during spawing season females appeared to be more abundant than the average value, accounting for 66~81% of the total.
하계 북서태평양 해역 어류 군집 : 유자망 시험어구에 채집된 어획물 중심으로
이장욱,박영철,안두해 한국수산자원학회 1998 한국수산자원학회지 Vol.1 No.-
A study on the fish community was carried out on the basis of fishery and oceanographic data collected from a research driftnet on board R/V Pusan 851(1,126 tons) of NFRDI in a wide area from the North Pacific Ocean(152° E~180°, 35°N~45°N) from July to August 1989. Water temperature and salinity in the survey are showed a large fluctuation ranging 10~27°C and 32.6~34,4 psu, respectively. Some commercially important species showed their own distribution limit L the neon flying squid (Ommastrephes bartrami) bound on the north by 43°N while the Pacific saury(Cololabis saira) and sardine(Sardinops melanostictus) distributed mainly on high latitudes and lower in high latitudes. Analysis of dendrogram of the clustering showed that three were three distinct groups at the 0.5 level of the correlation similarity index of species composition.
공영,양원석,이재후,박영철 한국수산경영학회 1987 수산경영론집 Vol.18 No.1
Tuna and tuna fishing extend over most of the tropical waters of the world oceans, especially, this study of the Indian Ocean and the fish and the fishing vessels are highly mobile. No country can deal in isolation with the problems of its tuna fishery and of any tuna fishery in its waters, without collaborating with other countries. This cooperation is often best established through some formal international mechanism. The essential requirements are for information-on the resources, the fishery, the trade-and to identify where management actions are needed to console the resources or to maintain the economic or social function of the fishery. These will also usually require some form of international mechanism. With the changes in the Law of the Sea, the situation in respect of management of tuna-considered among the highly migratory species, requiring special treatment-has also changed. At present there are both uncertainty regarding tuna management and political arguments as to how such management can be best implemented. Bearing this in mind, together with the fact that only few tuna stocks have shown clear evidence of serious depletion through over-exploitation, present emphasis will be placed on information requirements. This study included compiling the data necessary to review the state of stoks in the Indian Ocean tuna fishing grounds. Information on the resources-where the fish are, their quantity, their movements, etc. is important, whether in planning development of new fisheries, or considering the need for collaboration with other countries (in ascertaining to what extent their catches may affect catches of the national fleet) or for conservation measures. A major source of information is the statistics of for conservation measures. A major source of information is the statistics of catch and fishing effort from existing commercial vessels. These need to be assembled for all fisheries on the same stock on an oceanwide basis. The statistical data also need to be analysed and intepreted, and combined with biological data(e.g., on growth, mortality and migration rates) to provide information that is intelligible and useful for administrators and other decision-makers. This must also be undertaken on a resource-wide or ocean-wide basis. Finally, because of the world-wide similarities in the methods of datching, processing and marketing fish, there is a particular but not exclusive need in those countries just beginning to develop their tuna fisheries-to have ready access to a syntheis of information on tuna, tuna biology and tuna fisheries and tuna fisheries economics and management on the Indian Ocean.