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A Review of Terminology, Concepts and Definitions for National Standard 1 Guidelines. December 2009 Todd Gedamke NOAA Fisheries Service Southeast Fisheries Science Center Miami, Florida.
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A Review of Terminology, Concepts and Definitions for National Standard 1 Guidelines December 2009 Todd Gedamke NOAA Fisheries Service Southeast Fisheries Science Center Miami, Florida
A Review of Terminology, Concepts and Definitions for National Standard 1 Guidelines “Making sure we’re talking the same language” December 2009 Todd Gedamke NOAA Fisheries Service Southeast Fisheries Science Center Miami, Florida
Notes: Many of these slides were originally prepared by Jennifer Ise, Deb Lambert, and Mark Millikin (SFD). US Caribbean specific slides were prepared by Bill Arnold (SERO). This presentation provides only a brief summary of the National Standard 1 guidelines. Any discrepancies between this presentation and the final National Standard 1 guidelines as published in the Federal Register on January 16, 2009 (74 FR 3178)will be resolved in favor of the Federal Register. Qs and As for ACL and NS1 guidelines are posted on F/SF website under “ACLs”
Definition FrameworkOFL > ABC > ACL ABC may not exceed OFL. The distance between the OFL and ABC depends on how scientific uncertainty is accounted for in the ABC control rule. The ACL may not exceed the ABC. ABC is one of the fishing level recommendations under MSA section 302(h)(6). Catch in Tons of a Stock Increasing Year 1 Corresponds with MSY Overfishing Limit Acceptable Biological Catch Annual Catch Limit Annual Catch Target Recommended § 600.310 (f)(1)-(7)
Why all the acronyms? What do they mean? OFL MSY ABC ACL ACT Uncertainty Overfishing/Overfished They have specific scientific/legal meanings.
National Standard (NS) 1 • “Conservation and management measures shall prevent overfishing while achieving, on a continuing basis, the optimum yield from each fishery for the United States fishing industry.” (MSA Section 301(a)(1))
Optimum Yield—based on Maximum Sustainable Yield • From section (2)(b)(4)--Purposes of the M-S Act: “To provide for the preparation and implementation, in accordance with national standards, of fishery management plans which will achieve and maintain, on a continuing basis, the optimum yield from each from each fishery; • From section 3(33) of the M-S Act; The term “optimum” with respect to the yield from a fishery, means the amount of fish which— • (A) will provide the greatest overall benefit to the Nation, particularly with respect to food production and recreational opportunities, and taking into account the protection of marine ecosystems; • (B) is prescribed as such on the basis of the maximum sustainable yield from the fishery, as reduced by any relevant economic, social, or ecological factor, and • (C) in the case of an overfished fishery, provides for rebuilding to a level consistent with producing maximum sustainable yield in such fishery
Maximum Sustainable Yield • The M-S Act does not define MSY • According to section 600.310(e)(1)(i)(A): MSY is the largest long-term average catch or yield that can be taken from a stock or stock complex under prevailing ecological, environmental conditions and fishery technological characteristics (e.g., gear selectivity), and the distribution of catch among fleets.
Simplified MSY Explanation Note: The following slides are meant to convey the fundamental scientific principles behind MSY and only represents the theoretical ‘ideal’ situation. The relationships have been simplified for illustrative purposes and in practice, the relationships can vary depending on species/fishery.
“Sustainable” – Given constant conditions (e.g. effort, environment) annual catch and numbers of fish/biomass in the stock remains constant.
Population Size Effort ~ - Number of Boats - Hours/Days of Fishing Fishing Effort
Population Size
Population Size Catch per unit effort (CPUE) is also declining More fishing effort = Longer time to catch the same amount Mean Length also declining
Population Size
No Fishing Maximum Biomass the environment can support • Catch = 0 and Yield = 0 • Unfished Biomass is known as ‘Carrying Capacity’ 0
No Fishing Maximum Biomass the environment can support • Catch = 0 and Yield = 0 • Unfished Biomass is known as ‘Carrying Capacity’ Assume One Fishing Boat Fish Population Can only replace itself to Carrying Capacity Sustainable Yield # is species specific Low 0
At first, sustainable yield increases with effort • Removals provide resources (e.g. food, space, holes for lobster) for new individuals (recruits) • Rate of increase is species specific and function of productivity 0
Maximum Sustainable Yield • Sustainable Yield Peaks at MSY • Removals still provide resources (e.g. food, space, holes for lobster) for new individuals (recruits) but, • Yield reaches maximum when population can’t replace itself fast enough (Births ≈ Deaths) • Actual point is species specific and function of productivity 0
Maximum Sustainable Yield Corresponds to a specific amount of: - Fishing Effort (Fmsy) - Biomass (Bmsy) 0
Maximum Sustainable Yield Rules of Thumb @ MSY (approximations): - Fishing Effort (Fmsy) ~ M (natural mortality rate) - Biomass (Bmsy) ~ ½ Unfished Biomass 0
Maximum Sustainable Yield • Declines in Yield after MSY • Population growth can’t keep up with the rate of removals • Resources are available but animals don’t reproduce and/or grow fast enough 0
MSY is a function of Species Productivity (e.g. Birth Rate, Growth, etc.) e.g. Herring e.g. Snappers e.g. Sharks
Definition FrameworkOFL > ABC > ACL ABC may not exceed OFL. The distance between the OFL and ABC depends on how scientific uncertainty is accounted for in the ABC control rule. The ACL may not exceed the ABC. ABC is one of the fishing level recommendations under MSA section 302(h)(6). Catch in Tons of a Stock Increasing Year 1 Corresponds with MSY Overfishing Limit Acceptable Biological Catch Annual Catch Limit Annual Catch Target Recommended § 600.310 (f)(1)-(7)
Catch in Tons of a Stock Increasing
Catch in Tons of a Stock Increasing Overfishing Limit Overfished or Overfishing
SSC Role Council Role Science-Management feedback loop OFL Scientific Uncertainty ACL ACL ≤ ABC ABC Management Uncertainty Science-Management feedback loop ACT Roles in Setting ACLs
Buffer to account for uncertainty (based on probability of exceeding OFL) Catch in Tons of a Stock Increasing Overfished or Overfishing Overfishing Limit
Buffer to account for uncertainty (based on probability of exceeding OFL) Catch in Tons of a Stock Increasing Acceptable Biological Catch Overfished or Overfishing Overfishing Limit
SSC Role Council Role Science-Management feedback loop OFL Scientific Uncertainty ACL ACL ≤ ABC ABC Management Uncertainty Science-Management feedback loop ACT Roles in Setting ACLs
Annual Catch Limit Catch in Tons of a Stock Increasing Acceptable Biological Catch Overfished or Overfishing Overfishing Limit
SSC Role Council Role Science-Management feedback loop OFL Scientific Uncertainty ACL ACL ≤ ABC ABC Management Uncertainty Science-Management feedback loop ACT Roles in Setting ACLs
Annual Catch Target Annual Catch Limit Catch in Tons of a Stock Increasing Acceptable Biological Catch Overfished or Overfishing Overfishing Limit
Annual Catch Limit Catch in Tons of a Stock Increasing Annual Catch Target Acceptable Biological Catch Overfished or Overfishing Overfishing Limit
Annual Catch Limit Catch in Tons of a Stock Increasing How does this relate to the current situation in the US Caribbean? Annual Catch Target Acceptable Biological Catch Overfished or Overfishing Overfishing Limit
Annual Catch Limit Catch in Tons of a Stock Increasing Annual Catch Target Acceptable Biological Catch Overfished or Overfishing Overfishing Limit
Annual Catch Limit X X X Catch in Tons of a Stock All species and species groups in front of CFMC today have been designated as ‘undergoing overfishing’ so by definition: All species and species groups in front of CFMC today have been designated as undergoing overfishing or overfished so by definition: Increasing Annual Catch Target Overfished or Overfishing Acceptable Biological Catch Overfishing Limit
Annual Catch Limit X X X Catch in Tons of a Stock All species and species groups in front of CFMC today have been designated as undergoing overfishing or overfished so by definition: Increasing Annual Catch Target Overfished or Overfishing Some reduction from Catch/Effort (when designated) is required Acceptable Biological Catch Overfishing Limit
Annual Catch Limit Catch in Tons of a Stock Increasing Note: ‘Uncertainty’ buffer is not part of this explanation yet. SFA based on data <2005 Annual Catch Target Overfished or Overfishing Some reduction from Catch/Effort (when designated) is required Acceptable Biological Catch Overfishing Limit
Annual Catch Limit Catch in Tons of a Stock If catch is constant (with constant effort) year after year then = ‘sustainable’ Increasing Annual Catch Target Overfished or Overfishing Acceptable Biological Catch Overfishing Limit
Parrotfish SFA Puerto Rico reported (solid) and adjusted (dashed) landings
Parrotfish SFA Puerto Rico reported (solid) and adjusted (dashed) landings
Parrotfish SFA Puerto Rico reported (solid) and adjusted (dashed) landings For this time period, catch relatively stable and no evidence effort is increasing.
Parrotfish Puerto Rico reported (solid) and adjusted (dashed) landings Using average catch from this time period is pre-SFA regulations. Reductions have likely occurred but no evidence that F has been reduced below Fmsy
Parrotfish Puerto Rico reported (solid) and adjusted (dashed) landings The years used to calculate average catch will determine the appropriate ‘uncertainty scalar’.
Summary of the NS1 Guidelines Related to ACLs and AMs MSA requires: ACLs and AMs to prevent overfishing, ACLs can not exceed fishing level recommendations of SSCs, and ACLs and AMs in all managed fisheries, with 2 exceptions. NS1 guidelines: ACLs and AMs for all stocks and stock complexes in a fishery, unless the 2 MSA exceptions apply, or if a species is in the FMP as an EC species. Clearly account for both scientific and management uncertainty AMs should prevent ACL overages, where possible, and always address overages, if they occur. An optional “ecosystem component” category could allow flexibility in FMPs for greater ecosystem considerations.