NE Groundfish selectivity

Species

The NE multispecies (Groundfish) FMP

• Atlantic Cod (COD)
• Haddock (HAD)
• Yellowtail Flounder (YTF)
• Pollock (POL)
• American Plaice (PLA)
• Witch Flounder (WTF)
• White Hake (WHK)
• Winter Flounder (WIF)
• Redfish (RED)
• Atlantic Halibut (HAL)

Non target species

• Windowpane flounder (WPF)
• Ocean Pout (OPT)
• Atlantic Wolffish (WOL)

Histogram of lengths

Number of fish over all designated groundfish fleets

Probability curves

Fish over all designated groundfish fleets

Probability curves stacked

Combined lengths across species

Fitted logistic model as described in Atlantis

$$psel = \frac{1}{1+exp(-selb(length - lsm))}$$ where

$lsm$ = length at 50% selectivity

$selb$ = steepness of the selectivity curve

Parameter estimates: $\hat{selb}$ = 0.1441718 and $\hat{lsm}$ = 32.6211107

Selectivities by GEARCAT