Section 5 AAC 35.517 - Bering Sea C opilio Tanner crab harvest strategy(a) In the Bering Sea District, the commercial C. opilioTanner crab fishery may open only if the department's analysis of preseason survey data indicates the population of C. opilioTanner crab (1) contains an estimated spawning biomass of at least 25 percent of Bmsy;(b) If the estimated spawning biomass of C. opilioTanner crab is (1) at least 25 percent of Bmsy, but less than Bmsy, the total allowable catch will be (Fmsy /3+(Bt-0.25 x Bmsy) x 0.417 x Fmsy /(0.75 x Bmsy)) x 100 percent of the estimated mature male biomass or 58 percent of exploited legal males, whichever is less;(2) at or above Bmsy, the total allowable catch will be (0.75 x Fmsy) x 100 percent of the estimated mature male biomass or 58 percent of the exploited legal males, whichever is less.(c) In implementing this harvest strategy, the board directs the department to use the best scientific information available and to consider the reliability of estimates of C. opilio Tanner crab, the manageability of the fishery, and any other factors the department determines necessary to be consistent with the sustained yield principles.(d) For the purposes of this section, (1) "Bmsy" means the population biomass of mature male and female C. opilioTanner crab that could produce maximum sustained yield under prevailing environmental conditions;(2) "Bt" means the biomass of mature male and female C. opilioTanner crab in a given year;(3) "estimated mature male biomass" means the estimated biomass of all morphometrically mature male C. opilio Tanner crab;(4) "estimated spawning biomass" means the estimated biomass of all morphometrically mature male C. opilioTanner crab and all morphometrically mature female C. opilioTanner crab;(5) "exploited legal males" means 100 percent of the new-shell male C. opilio Tanner crab that are at least 102 millimeters (four inches) in width of shell, plus a percentage of old-shell male C. opilio Tanner crab that are at least 102 millimeters in width of shell estimated at the time of the survey; the percentage of old-shell male C. opilio Tanner crab will be based on the expected fishery selectivity for old-shell verses new-shell male C. opilio Tanner crab;(6) "Fmsy" means the fishing mortality of the mature male C. opilioTanner crab stock that could produce maximum sustained yield under prevailing environmental conditions.Eff. 8/31/2000, Register 155; am 8/24/2002, Register 163; am 8/14/2005, Register 175; am 6/10/2010, Register 194