Code of Federal Regulations Title 50. Wildlife and Fisheries § 50.660.413 Overfished species rebuilding plans

(1) The KRFC control rule uses reference points F_ABC MSST, S_MSY, and two levels of de minimis exploitation rates, F = 0.10 and F = 0.25. The maximum allowable exploitation rate, F, in a given year, depends on the pre-fishery ocean abundance in spawner equivalent units, N. At high abundance, the control rule caps the exploitation rate at F_ABC;  at moderate abundance, the control rule specifies an F that results in S_MSY spawners;  and at low abundance (i.e. when expected escapement is below S_MSY ), the control rule allows for de minimis exploitation rates with the abundance breakpoints defined as:  A = MSST/2;  B = (MSST + S_MSY)/2;  C = S_MSY /(1—0.25);  D = S_MSY /(1—F_ABC), as shown in Figure 1 of subpart H of this part. For N between 0 and A, F increases linearly from 0 at N = 0, to 0.10 at N = A. For N between A and MSST, F is equal to 0.10. For N between MSST and B, F increases linearly from 0.10 at N = MSST, to 0.25 at N = B. For N between B and C, F is equal to 0.25. For N between C and D, F is the value that results in S_MSY spawners. For N greater than D, F is equal to F_ABC.

(2) [Reserved]

(1) The SRFC control rule uses the reference points F_ABC, MSST, S_MSY, and two levels of de minimis exploitation rates, F = 0.10 and F = 0.25. The maximum allowable exploitation rate, F, in a given year, depends on the pre-fishery ocean abundance in spawner equivalent units, N. At high abundance, the control rule caps the exploitation rate at F_ABC;  at moderate abundance, the control rule specifies an F that results in S_MSY spawners;  and at low abundance (i.e. when expected escapement is below S_MSY), the control rule allows for de minimis exploitation rates with the abundance breakpoints defined as:  A = MSST/2;  B = (MSST + S_MSY )/2;  C = S_MSY/(1—0.25);  D = S_MSY /(1—F_ABC , as shown in Figure 1 of subpart H of this part. For N between 0 and A, F increases linearly from 0 at N = 0, to 0.10 at N = A. For N between A and MSST, F is equal to 0.10. For N between MSST and B, F increases linearly from 0.10 at N = MSST, to 0.25 at N = B. For N between B and C, F is equal to 0.25. For N between C and D, F is the value that results in S_MSY spawners. For N greater than D, F is equal to F_ABC.

(2) [Reserved]

(1) The Snohomish coho salmon stock was declared overfished in 2018. The target year for rebuilding Snohomish coho is 2020. The harvest control rule during the rebuilding period for Snohomish coho is the abundance-based stepped harvest rate as shown in table 3 to this paragraph (e).

(2) In years when Snohomish coho abundance is forecast to exceed 137,000, the total allowable exploitation rate will be limited to target achieving a spawning escapement of 55,000 Snohomish coho.