スルメイカ稚仔標本の保存液の検討（要旨）

Size: px

Start display at page:

Download "スルメイカ稚仔標本の保存液の検討（要旨）"

ともひろやまがた
5 years ago
Views:

1 Stock assessment of the autumn cohort of neon flying squid (Ommastrephes bartramii) in the North Pacific based on the past driftnet fishery data Kedarnath Mahapatra Tar o ICHII, Kedarnath MAHAPATRA, 1970, 1978,, ,, , 1/3,,, ,,,, 1992, 1995,, 1,,, 1998;, 1998, , 170E, 170E,

2 ,, 3 -, DeLury,, 140 E 150 E 160 E 170 E W 160 W 150 W 140 W 130 W 120 W 60 N 60 N 50 N 50 N 40 N 40 N 30 N 30 N 20 N 20 N 140 E 150 E 160 E 170 E W 160 W 150 W 140 W 130 W 120 W 60 N 60 N 50 N 50 N 40 N 40 N 30 N 30 N 20 N 20 N 140 E 150 E 160 E 170 E W 160 W 150 W 140 W 130 W 120 W 2, 1982~1992, 1 1, N, 170E145W,, 3 6~12, mm Yatsu et al, 1993, Gong et al 1993 Yeh and 4 12, 4 11, mm, mm Tung1993, 170E, 1991 DeLury, ML ;cm, BW ;g, BW = ML r 2 =09925,

3 14 0 E 150 E 160 E 17 0 E W 160 W 150 W 14 0 W 130 W 120 W 60 N 60 N 50 N 50 N Sep Aug/Sep 45 N 46 N Aug Oct 44 N Jul/No v Jul 43 N 42 N Nov Ju n/dec 40 N 40 N 40 N Prohibited Proh ibite d 30 N 30 N 20 N 170 E Hawaii Is 20 N 145 W 14 0 E 150 E 160 E 17 0 E W 160 W 150 W 14 0 W 130 W 120 W E N, Hokkaido University, ,, 19157mm 19, 48157mm 13 Yatsu et al, 2000 CPUE, Yatsu et al2000, 93157mm 10, NOAA AVHRR Reynolds SST 1,,, 4, d (g/m 2 ), 2001 d = C(100 k )(1 Lvt) (1), 1 L (m), v (m/h) t (h), 7m k % C (kg) 4, 100,,

4 DeLury,, DeLury, M,1982, M ln( Ct X t ) + M ( t + 1/ 2) = ln( qn ) q( X i + X / 2) t=0, 1,,n-1 (2) t 1 0 t i= 0, C, X, N0, q, i, t,, Ct, t, t t ln( Ct X t ) + M ( t + 1/ 2) ( X i + X t / 2), N0 3 (ASPIC ), Hendrickson et al 1996;, 2002 ASPIC, 1999,,,,,,,,,,, 2002,, CPUE ASPIC Prager, db dt = ( r qx B rb / K (3) t t ) t t, Btt, K, q, r, Xt, CPUE qbt, qxtbt, t 1 i= 0

5 K, B1-ratio MSY B0 2, ASPIC Prager, , 6~8 3035cm, 9 40cm 3038cm, cm 5, 9, 1990, 9,, 170E 5 ~ ,, 6 CPUEkg/7, 1, 7, 59

6 6, CPUEkg/ CPUE /10 (SST), Ichii et al (2004), CPUE /10 SST120180, 7 SST , 7 CPUE , CPUE 1 1 SST 8, 7 SST120180, CPUE,

7 CPUEkg/ SST SST CPUE (1) 1 L 50m v, 7 15,, 1982~92 v 420m/, 380 m/ t 9,,, 7m k 25%,, 1 1 Lvt 144,000~257,000m C CPUE kg, d g/m E-145W km 2, DeLury, 7~ 8, 1990Ichii et al, 2004, CPUEkg/, 6, 7 1 N 9, CPUE, C,,, X C/ CPUE M 007/,1982

8 N, q N, , CPUE, N 7 ;2 7 N, M q, , q, N r 2 =061 9 DeLury CPUE C:, X:, M: 7~8 6

9 3 DeLury, 3 ASPIC CPUE, 1992, 10, 1023,, Yatsu et al, 2000, 1999,, CPUE 10,, 2003,, 1998, Lukas, 2001, , CPUE kg/ 10, ~30 11, 374, MSY 187, MSY CPUE, CPUE 1999, CPUE

10 E ASPIC , , DeLury , ASPIC , 3, ASPIC,, MSY,, MSY, r, q, K Prager, 1994, Prager, 1994, 1530 DeLury, M, M, /, Illex argentinus, 0086/ Beddington et al,1990,, Pa uly, 1981 Illex illecebrosus, 01/ Hendrickson, 1996,, Hoenig, /, /Peterson and Wroblewski, 1984, 0086/ Rosenberg et al, /, /, 3 M 1982 M,, 007/, 2 CPUE Z 015/, M F, M Z 007/ DeLury M, M, 1986, M= , M= , M= LL, M 007,, 1982,,,, DeLury, M,

11 12DeLury,, 2,, 7m k, 25%, ~ k 1986, k, 13 k 25% 100, 15% 2, 35% 090, 7, k,, 100%,, catch efficiency 70% Ishida, 1986,, 13 7m, , 1563, , 24 70

12 ASPIC, 1ASPIC, MSY, B/Bmsy MSY, msy F/F, Prager, 1994, 1980~92, 1987 Fmsy ,, 1988 B msy ,, 14ASPIC 2 E,, Sissenwine and Tibbetts1976,, E=40% , E, 7, 7,, 5 7

13 5, E, 45%, 1982~ ASPIC, 3 ASPIC,,,,,, Yatsu et al, 1997, ASPIC,,,,, Beddington JR, R ozenberg AA, Crombie JA and Kirkwood GP, 1990: Stock assessment and the provision of management advice for the short fin squid fishery in Falkland Islands waters Fish Res,, Gong Y, Kim Y-S and Hwang S-J, 1993: Outline of the Korean squid gillnet fishery in the North Pacif ic Int N Pac Fish Comm Bull,, shortfin squid in the northwest Atlantic during 1993 Northwest Fisheries Science Center Reference Document,, 1-63 Hoenig JM, 1983 Empi rical use of longevity data to estimate mortality rates Fish Bull, 81: , 2004: 15, 16 3, Hokkaid o University, : Data record of oceanographic observations and exploratory fish ing Hakodate, Japan Faculty of Fisheries, Hokkaido University Nos Ichii T, Mahapatra K, Sakai M, Inagake D and Okada Y, 2004: Differing body size between the autumn and winter-spring cohorts of neon flying squid (Ommastrephes bartramii) related to the ocea nographic regime in the North Pacific: a hypothesis Fish Oceanogr,, 1-15 Ishida Y, 1989: Estimation of catch efficiency and chum salmon abundance by parallel gillnet experiment Bull Lukas R, 2001: Freshening of the upper thermocline in the North Pacific subtropical gyre associated with decadal changes of rainfall Geophys Res Letters, 28, , 2003: Major regime shift 1998/99,, Hendrickson LC, Brodziak J, Basson M and Rago P, 1996: Stock assessment of northern Jap Soc Sci Fish 52, , 1990:,, ,, 1982: 1-10

14 ,, 1998:,,, pp11-28,,, 1998:, ( ),,, pp47-62 Pauly D, 1981: On the interrelationship between natural mortality, growth parameters and mean environmental temperature in 175 fish stocks J Cons Int Explor Mer,, Peterson I and Wroblewski JS, 1984: Mortality rates of fishes in the pelagic ecosystem Can J Fish Aquat Sci,, Prager M H, 1994: A suite of extensions to nonequilibrium surplus-production model Fish Bull US,, Prager M H, 1995: User s manual for ASPIC: a stock-production model incorporating covariates, program version 36x US National Marine Fisheries Service, Southeast Fisheries Science Center, Miami Laboratory, Document MIA-92/93-55, 4 th edition, Miami Rosenberg AA, Kirkwood GP, Crombie J and Beddington JR, 1990: The assessment of stocks of annual squid species Fish Res,, , 1987:,, Sissenwine MP and Tibbetts AM, 1976: Simulating the effects of fishing on squid (Loligo and Illex) populations of the Northeastern United States ICNAF Sel Pap,, 71-84, 1999:,, , 2001:,137, , 1992: , 1995:,,,pp52-61, 2002: : 13, Yatsu A, Hiramatsu H and Hayase S, 1993: Outline of the Japanese Squid Driftnet Fishery with Notes on the By-Catch Int N Pac Fish Comm Bull,, 5-24,,, 1998: Ommastrephes bartramii, ( ),, pp29-46 Yatsu A, Midorikawa S, Shimada T and Uozumi Y,1997: Age and growth of the neon flying squid, Ommastrephes bartrami, in the North Pacific Ocean Fish Res, 29, Yatsu A, Watanabe T, Mori J, Nagasawa K, Ishida Y, Meguro T, Kamei Y and Sakurai Y, 2000: Interannual variability in stock abundance of the neon flying squid, Ommastrephes bartramii, in the North Pacific Ocean during : impact of driftnet fishing and oceanographic conditions Fish Oceanogr,, Yeh S and Tung I, 1993: Review of Taiwanese pelagic squid fisheries in the North Pacific Int N Pac Fish Comm Bull,, 71-76

Figure 1. Characteristics of the ocean environment and oceanic survey area in the Sea of Japan. Thin lines with arrow (upper left) show the schema of

Figure 1. Characteristics of the ocean environment and oceanic survey area in the Sea of Japan. Thin lines with arrow (upper left) show the schema of 1980 1 1 1 2 3 Transitions in purse seine fishing in the southwestern Sea of Japan after the second half of the 1980s Tsuyoshi SHIMURA 1, Shinya MASUDA 1, Ryosuke UJI 1, Jun YAMAMOTO 2 and Yasunori SAKURAI