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Incidental Catch of Marine Birds in the North Pacific High Seas Driftnet Fisheries in 1990

Tables


Table 1.  Observed bycatch of selected marine birds in the North Pacific High Seas driftnet fisheries, by fishery, in the 1990 season (1990-91 for Japan large-mesh).
Species Japan
squid
Japan
large-mesh
Korea
squid
Taiwan
combined
Laysan Albatross
882 76 50 35
Black-footed Albatross
196 30 12 8
Northern Fulmar
152 14 63 122
Mottled Petrel
8 0 0 0
Juan-Fernandez Petrel
5 0 0 0
Dark-rumped Petrel
1 0 0 0
Solander's Petrel
1 0 0 0
Stejneger's Petrel
1 1 0 0
Bonin Petrel
  0 0 0
Streaked Shearwater
0 0 3 0
Pale-footed Shearwater
74 5 1 0
Pink-footed Shearwater
0 0 3 0
Newell's Shearwater
1 0 0 0
Buller's Shearwater
392 0 16 4
Sooty Shearwater
19,056 72 312 19
Short-tailed Shearwater
959 0 6 2
Dark Shearwatera
28,332 81 423 98
Wilson's Storm-Petrel
6 0 0 0
Leach's Storm-Petrel
8 8 0 1
Fork-tailed Storm-Petrel
196 0 49 1
Tristram's Storm-Petrel
0 0 0 1
Red Phalarope
  1 0 0
Pomarine Jaeger
1 0 1 0
Long-tailed Jaeger
1 0 0 0
Slaty-backed Gull
0 0 1 0
Black-legged Kittiwake
0 0 5 0
Thick-billed Murre
1 0 1 0
Japanese Murrelet
0 0 4 0
Rhinoceros Auklet
1 0 3 0
Horned Puffin
62 0 0 0
Tufted Puffin
24 0 0 0
Other Species
902 33 112 22

a Includes Sooty, Short-tailed, and unidentified dark shearwaters.

 

Table 2.  Observed bycatch rates (per 1,000,000 standardized effective tans) of selected marine birds in the North Pacific High Seas driftnet fisheries, by fishery, in the 1990 season (1990-91 for Japan large-mesh).
Species Japan
squid
Japan
large-mesh
Korea
squid
Taiwan
combined
Laysan Albatross
414 370 194 305
Black-footed Albatross
92 146 47 70
Northern Fulmar
71 68 245 94
Flesh-footed Shearwater
35 24 4 0
Buller's Shearwater
184 0 62 26
Sooty Shearwater
8,935 351 1,211 174
Short-tailed Shearwater
450 0 23 9
Dark Shearwatera
13,285 395 1,642 611
Leach's Storm-Petrel
4 39 0 7
Fork-tailed Storm-Petrel
92 0 190 3
Horned Puffin
29 0 0 0
Tufted Puffin
11 0 0 0
Other Species
423 161 435 186
a Includes Sooty, Short-tailed, and Unidentified Dark Shearwaters.

 

Table 3.  Estimated total bycatch of selected taxa of marine birds, in the North Pacific High Seas driftnet fisheries, by fishery, in the 1990 season (1990-91 for Japan large-mesh).  Standard errors are in parentheses.
TAXON JAPAN
SQUID
JAPAN
LARGE-MESH
KOREA
SQUID
TAIWAN
COMBINED
TOTAL
Laysan Albatross
9,417
(406)
1,735
(89)
4,774
(365)
1,622
(321)
17,548
(640)
Black-footed Albatross
2,093
(117)
685
(37)
1,146
(173)
322
(113)
4,426
(240)
Northern Fulmer
1,623
(229)
320
(32)
6,015
(1,220)
559
(291)
8,517
(1,275)
Mottled Petrelb
+ 0 0 0 +
Juan-Fernandez Petrelb
+ 0 0 0 +
Dark-rumped Petrelb
+ 0 0 0 +
Solander's Petrelb
+ 0 0 0 +
Stejneger's Petrelb
+ 0 0 0 +
Bonin Petrelb
0 0 + 0 +
Streaked Shearwaterb
0 0 + 0 +
Pale-footed Shearwater
790
(79)
114
(17)
95
(47)
0
(0)
999
(93)
Pink-footed Shearwater
+ 0 + 0 +
Newell's Shearwaterb
+ 0 0 0 +
Buller's Shearwater
4,185
(353)
0
(0)
1,528
(252)
168
(83)
5,881
(442)
Sooty Shearwater
203,447
(9,717)
1,643
(130)
29,790
(3,705)
793
(418)
235,673
(10,409)
Short-tailed Shearwater
10,239
(1,333)
0
(0)
573
(133)
75
(52)
10,887
(1,341)
Dark Shearwatera
302,495
(13,824)
1,849
(133)
40,388
(4,452)
4,559
(2,575)
349,291
(14,750)
Wilson's Storm-Petrelb
+ 0 0 0 +
Leach's Storm-Petrel
85
(20)
183
(23)
0
(0)
34
(34)
302
(46)
Fork-tailed Storm-Petrel
2,093
(329)
0
(0)
4,679
(807)
34
(34)
6,806
(872)
Tristram's Storm-Petrelb
0 0 0 + +
Red Phalaropeb
+ 0 0 0 +
Pomarine Jaegerb
+ 0 + 0 +
Long-tailed Jaegerb
+ 0 0 0 +
Slaty-backed Gullb
0 0 + 0 +
Black-legged kittiwakeb
0 0 + 0 +
Thick-billed Murreb
+ 0 + 0 +
Japanese Murreletb
0 0 + 0 +
Rhinoceros Aukletb
+ 0 + 0 +
Horned Puffin
662
(116)
0
(0)
0
(0)
0
(0)
662
(116)
Tufted Puffin
256
(69)
0
(0)
0
(0)
0
(0)
256
(69)
Other Species
9,630
(989)
753
(44)
10,694
(856)
879
(199)
21,956
(1,324)
All Species
333,329
(13,877)
5,639
(175)
69,319
(4,788)
8,177
(2,623)
416,464
(14,913)
a Includes Sooty, Short-tailed, and unidentified dark shearwater.
b Species that had too few numbers to analyze.

 

Table 4.  Spatial and temporal variation in bycatch rates of Laysan Albatrosses in the 1990 Japanese squid driftnet fishery.  Numbers represent model-based estimates of bycatch rates (per 1,000,000 standardized effective tans) for average values of net soak time (13.4 hours).  Dashes indicate lack of fishing effort in area and time period.
oLATITUDE oLONGITUDE MONTH
MAY JUNE JULY AUG. SEPT. OCT. NOV. DEC.
45N 170E -- -- 1506 1310 1114 -- -- --
  175E -- -- -- 959 797 -- -- --
  180 -- -- -- 666 537 407 -- --
  175W -- -- -- 430 334 238 -- --
  170W -- -- 314 251 189 126 -- --
  165W -- -- 160 130 101 -- -- --
  160W -- -- 62 66 71 -- -- --
  155W -- -- 22 60 97 -- -- --
  150W -- -- 40 111 182 -- -- --
  145W -- -- 115 -- -- -- -- --
 
40N 170E -- 1070 1052 1033 1014 995 -- 958
  175E 793 762 731 699 668 637 605 --
  180 555 511 467 -- 379 336 292 --
  175W 373 317 261 -- 148 92 -- --
  170W -- 181 112 -- -- -- -- --
  165W 183 102 20 -- -- -- -- --
  160W -- 80 -14 -108 -- -- -- --
  155W 222 116 10 -97 -- -- -- --
  150W 328 209 90 -29 -- -- -- --
  145W 491 360 -- -- -- -- -- --
 
35N 175E 139 -- -- -- -- -- -- --
  180 55 -- -- -- -- -- -- --
  175W 29 -- -- -- -- -- -- --
  170W 60 -- -- -- -- -- -- --
  165W 148 15 -- -- -- -- -- --
  160W 294 -- -- -- -- -- -- --
  155W 497 -- -- -- -- -- -- --
  150W 758 -- -- -- -- -- -- --

 

Table 5.Spatial and temporal variation in bycatch rates of Black-footed Albatrosses in the 1990 Japanese squid driftnet fishery. Numbers represent model-based estimates of bycatch rates (per 1,000,000 standardized effective tans).  Dashes indicate lack of fishing effort in area and time period.
oLATITUDE oLONGITUDE MONTH
MAY JUNE JULY AUG. SEPT. OCT. NOV. DEC.
45N 170E -- -- 62 15 -32 -- -- --
  175E -- -- -- 38 14 -- -- --
  180 -- -- -- 62 61 60 -- --
  175W -- -- -- 85 107 130 -- --
  170W -- -- 62 108 154 200 -- --
  165W -- -- 62 131 200 -- -- --
  160W -- -- 63 155 247 -- -- --
  155W -- -- 63 178 293 -- -- --
  150W -- -- 63 201 340 -- -- --
  145W -- -- 63 -- -- -- -- --
 
40N 170E -- 44 62 80 99 117 -- 154
  175E 18 41 64 87 110 133 157 --
  180 10 38 66 -- 122 150 178 --
  175W 3 35 68 -- 134 166 -- --
  170W -- 33 70 -- -- -- -- --
  165W -13 30 72 -- -- -- -- --
  160W -- 27 74 121 -- -- -- --
  155W -28 24 76 128 -- -- -- --
  150W -35 21 78 135 -- -- -- --
  145W -43 19 -- -- -- -- -- --
 
35N 175E -74 -- -- -- -- -- -- --
  180 -43 -- -- -- -- -- -- --
  175W -12 -- -- -- -- -- -- --
  170W 19 -- -- -- -- -- -- --
  165W 50 66 -- -- -- -- -- --
  160W 82 -- -- -- -- -- -- --
  155W 113 -- -- -- -- -- -- --
  150W 144 -- -- -- -- -- -- --

 

Table 6.  Spatial and temporal variation in bycatch rates of dark shearwatersa in the 1990 Japanese squid driftnet fishery.  Numbers represent model-based estimates of bycatch rates (per 1000 standardized effective tans) for average values of net soak time (13.4 hours) and sea surface temperature (15.2° C).  Dashes indicate lack of fishing effort in area and time period.
oLATITUDE oLONGITUDE MONTH
MAY JUNE JULY AUG. SEPT. OCT. NOV. DEC.
45N 170E -- -- 13 13 13 -- -- --
  175E -- -- -- 14 16 -- -- --
  180 -- -- -- 16 18 21 -- --
  175W -- -- -- 17 21 25 -- --
  170W -- -- 12 18 24 30 -- --
  165W -- -- 12 19 27 -- -- --
  160W -- -- 12 21 29 -- -- --
  155W -- -- 12 22 32 -- -- --
  150W -- -- 12 23 35 -- -- --
  145W -- -- 12 -- -- -- -- --
 
40N 170E -- 11 12 13 15 16 -- 19
  175E 8 9 11 12 14 15 17 --
  180 7 8 10 -- 13 14 16 --
  175W 5 7 9 -- 12 13 -- --
  170W -- 6 7 -- -- -- -- --
  165W 3 5 6 -- -- -- -- --
  160W -- 3 5 7 -- -- -- --
  155W 0 2 4 6 -- -- -- --
  150W -1 1 3 5 -- -- -- --
  145W -2 -0 -- -- -- -- -- --
 
35N 175E 5 -- -- -- -- -- -- --
  180 6 -- -- -- -- -- -- --
  175W 6 -- -- -- -- -- -- --
  170W 7 -- -- -- -- -- -- --
  165W 8 4 -- -- -- -- -- --
  160W 8 -- -- -- -- -- -- --
  155W 9 -- -- -- -- -- -- --
  150W 9 -- -- -- -- -- -- --
a Includes Sooty, Short-tailed, and unidentified dark shearwaters.

 

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