Table 4. Marine mammal bycatch rates (takes/observed
landings) in1996 in the Northeast sink gillnet fishery, by species, season,
port group and marine mammal closure strata with (CV in parentheses).
Species
and
Season
Ports
Off Shore
Marine Mammal Closures
Northern Maine
Southern Maine
New Hampshire
North Boston
South Boston
East
Cape
Cod
South
Cape
Cod
Mid-
Coast
Mass
Bay
South
Cape
Cod
Harbor Porpoise
W
-
0.357
(106)
0.191
(113)
0.131
(48)
0
0
0.248
(51)
1.60
(19)
0.737
(48)
0.076
(106)
0
S
0.042
(69)
0
0
0
0
0
0
0
*
*
*
F
0
0
0
0.119
(89)
0.022
(111)
0
0.091
(120)
0.040
(97)
0.051
(76)
*
*
Harbor Seal
W
-
0
0.12
(72)
0.033
(104)
0.758
(45)
0
0.083
(60)
0
1.2631 (66)
0
0
S
0
0.030
(67)
0.0931 (187)
0.051
(114)
0
0
0
0
*
*
*
F
0
0
0
0
0
0
0.046
(880)
0.118
(114)
0.0641 (77)
*
*
White-sided
Dolphin
S
0
0
0
0
0
0.030
(73)
0
0
*
*
*
F
0
0
0
0
0
0.025
(96)
0
0
0
*
*
Common
Dolphin
F
0
0
0
0
0
0
0.046
(143)
0
0
0
0
Gray Seal
W
-
0
0
0.033
(100)
0
0
0
0
0.1581 (155)
0
0
F
0
0
0
0
0
0
0
0
0.0211 (119)
*
*
Harp Seal
W
-
0
0.127
(108)
0.066
(69)
0
0
0
0
0.1581
(133)
0.076
(113)
0
All Marine Mammals
W
-
0.357
(106)
0.446
(59)
0.262
(38)
0.758
(45)
0
0.331
(47)
1.600
(19)
2.316
(31)
0.153
(77)
0
S
0.042
(69)
0.030
(67)
0.093
(187)
0.051
(114)
0
0.030
(73)
0
0
*
*
*
F
0
0
0
0.119
(89)
0.022
(111)
0.025
(96)
0.183
(68)
0.158
(89)
0.136
(60)
*
*
* No closure during this season
- No observed trips 1 Rate includes unknown seals