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ACL DETERMINATION STEPS TO FOLLOW ACTIONS 2 AND 3.

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Presentation on theme: "ACL DETERMINATION STEPS TO FOLLOW ACTIONS 2 AND 3."— Presentation transcript:

1 ACL DETERMINATION STEPS TO FOLLOW ACTIONS 2 AND 3

2 PARAMETERS MSYThe largest long-term average catch or yield that can be taken from a stock or stock complex under prevailing ecological and environmental conditions. MSY proxy would equate to average catch. OYThe amount of yield that provides the greatest overall benefit to the Nation, taking into account food production, recreational opportunities and the protection of marine ecosystems. OY Proxy and ACL would be equal values. OFLThe maximum rate of fishing a stock can withstand (MFMT) or maximum yield a stock can produce (OFL), annually, while still providing MSY on a continuing basis. Defined as the amount of catch corresponding to the MSY proxy and overfishing would be determined to occur if annual catches exceed the OFL. ABCIs a level of a stock or stock complex’s annual catch that accounts for the scientific uncertainty in the estimate of OFL. ACLThe annual level to which catch is limited in order to prevent overfishing from occurring. Is the level of annual catch of a stock or stock complex that serves as the basis for invoking accountability measures.

3 Catch (lbs) Increasing Annual Catch Limit Acceptable Biological Catch Overfishing Limit (OFL) ACL is the level of annual catch of a stock or stock complex that serves as the basis for invoking accountability measures. How does one determine the actual values for the ACLs? MSY proxy would equate to average catch OFL=MSY proxy OY proxy =ACL OY proxy=ACL=OFL*scalar

4 Action 2 Example for snappers

5 SNAPPERSPRSTTSTXRec. ALT 197-0194-02 00-01 ALT 299-0500-0599-0500-05 ALT 399-0700-0799-0700-07 ALT 403-07 CHOOSE THE YEAR SEQUENCE

6 SNAPPERS ALT 2(c) No SCALAR 1.00 ALT 2(d)0.85 ALT 2(e)0.75 ALT 2(f)0.50 CHOOSE SCALAR

7 Parameters for snappers in the US Caribbean Action 2(a), Alt 2, Alternative 2d MSYOFLOY/ACL (0.75 scalar) SNAPPERS1,986,351 1,489,763 SNAPPERSPRSTTSTXRec. Action 2(a) ALT 2 99-0500-0599-0500-05

8 Action 3: Annual Catch Limit Allocation Action 3(a): Snappers: Aggregate or units? Snappers (USVI, PR) Snapper unit 1 (PR)

9 SNAPPERSPRSTTSTXPR Rec. ALT 299-0500-0599-0500-05 SNAPPERS1,432,668157,382121,113275,188 Snapper Unit 1334,923N/A 105,344 Average landings for the chosen years:

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12 Action 3: Annual Catch Limits Action 3(b): Commercial and Recreational Sectors? Action 3(b) Sector PRSTTSTX CommercialYES RecreationalYESN/A

13 Action 3: Annual Catch Limits Action 3(c): Geographical allocation Puerto Rico STT/STJ STX

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