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Table 5. 2006 harbor porpoise bycatch estimate in the NESG

2006 Winter (Jan-May) Observed Takes Bycatch Rate (Take/mTon) Estimated Takes CV (%) 95% CI
Port Group-Area Strata
Northern Maine 0 0.000 0
Southern Maine 0 0.000 0
New Hampshire 0 0.000 0
North of Boston 3b 0.111c 50 71% 3-124
South of Boston 1b 0.087 38 99% 1-128
South Of Cape Coda 13b 0.188 265 48% 52-561
East Of Cape Cod 0 0.000 0
Offshore 0 0.000 0
Closure Strata
Offshore Closure 0 0.000 0
Cashes Ledge Closure 0 0.000 0
Midcoast Closure 0 0.000 0
Mass Bay Closure 0 0.000 0
Cape Cod Bay Closure 0 0.000 0
South Cape Closurea 5b 0.095c 67 80% 5-188
Great S. Channel Closure 0 0.000 0    
Subtotal 22 420 36% 168-740
Summer (Jun-Aug) Observed Takes Bycatch Rate (Take/mTon) Estimated Takes CV (%) 95% CI
Port Group-Area Strata
Northern Maine 0 0.000 0
Southern Maine 0 0.000 0
New Hampshire 1b 0.092 37 108% 1-134
North of Boston 0 0.000 0
South of Boston 0 0.000 0
South Of Cape Coda 0 0.000 0
East Of Cape Cod 0 0.000 0
Offshore 0 0.000 0
Closure Strata
Northeast Closure 0 0.000 0
Great S. Channel Closure 0 0.000 0
Subtotal 1 37 108% 1-134
Fall (Sep-Dec) Observed Takes Bycatch Rate (Take/mton) Estimated Takes CV (%) 95% CI
Port Group-Area Strata
Northern Maine 0 0.000 0
Southern Maine 0 0.000 0
New Hampshire 0 0.000 0
North of Boston 1b 0.081c 31 104% 1-110
South of Boston 0 0.000 0
South Of Cape Coda 0 0.000 0
East Of Cape Cod 0 0.000 0
Offshore 0 0.000 0
Closure Strata
Northeast Closure 0 0.000 0
Offshore Closure 0 0.000 0
Midcoast Closure 2d 0.035c 26 71% 2-69
Mass Bay Closure 0 0.000 0
South Cape Closurea 0 0.000 0
Subtotal 3 57 66% 1-143
2006 Total 26 514 31% 236-863

a Totals for South of Cape Cod port group and closure stratum includes effort from Connecticut and New York trips that fished east of 72º30’W.
b Observed take from haul not equipped with pingers.
c A weighted bycatch rate (observed hauls with and without pingers were used to calculate a weighted bycatch rate).
d Observed take from haul equipped with pingers.

to Table 6

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(Modified Feb. 13 2008)