Next Steps For Striped Bass
lainnya The Atlantic U.S. of A. Marine Fisheries Commission is preparing to set together a novel benchmark stock assessment for striped bass.
That’s non unexpected, as well as it’s non a bad thing.
Back inwards 2013, when the final benchmark stock assessment was completed, managers had already announced their intention to arrive at a benchmark assessment of fishery at the goal of the 2017 season. Such regular assessments are the solely means for fishery managers to acquire whether the stock is doing well, or whether it’s having problems as well as management needs to alter inwards gild to set it dorsum on the correct track.
That’s what happened later the final assessment, which informed managers that they had to substantially lower the line-fishing mortality reference points—the target as well as the overfishing threshold—to maintain the stock from becoming overfished as well as allow it to rebuild.
The reference points used to deal a fishery tin hold out based on a number of factors. Most often, they are based on the productivity of the stock.
In federal fishery management plans, the line-fishing mortality threshold (Fthreshold) is commonly the upper bound of sustainable harvest; that is, the grade of line-fishing mortality that produces maximum sustainable yield. Fishing at whatsoever charge per unit of measurement higher upward Fthreshold would hold out unsustainable, as well as would eventually travail abundance to decline; when line-fishing mortality exceeds Fthreshold, overfishing is said to occur. The line-fishing mortality target (Ftarget) is typically set below Fthreshold; that tin hold out done for many reasons, including to create a buffer that accounts for scientific and/or management uncertainty, to arrive at a greater abundance of fish and/or larger fish than would hold out available at Fthreshold, to allow to a greater extent than older fish to remain inwards the spawning stock, etc.
The biomass target (Btarget) mostly represents the minimum number of fish needed to arrive at maximum sustainable yield; because it is a mensurate of productivity, as well as solely mature fish tin reproduce as well as perpetuate the stock, it is ofttimes expressed equally a spawning stock biomass target (SSBtarget). Fish populations fluctuate naturally, as well as seldom remain at or really close Btarget (or SSBtarget) for long; they are usually somewhat higher upward or below that mark. However, at that topographic point are times that, usually because of line-fishing activity, populations autumn to unusually depression levels, as well as are deemed to hold out “overfished.” The grade at which that occurs is the biomass or spawning stock biomass threshold (Bthreshold or SSBthreshold, respectively).
In the illustration of striped bass, things run a piddling fleck differently. They are managed yesteryear the states through ASMFC, as well as non yesteryear federal fishery managers pursuant to the Magnuson-Stevens Fishery Conservation as well as Management Act. Thus, at that topographic point is no legal provision that protects the striped bass from overfishing—that is, a harvest grade that exceeds maximum sustainable yield—or, should the stock i time to a greater extent than go overfished, requires that it hold out rebuilt. That beingness the case, at that topographic point is no requirement tying Fthreshold or Btarget to maximum sustainable yield, or Bthreshold to an overfished stock.
Such set of reference points was inwards accord with the goal of Amendment half-dozen to the Interstate Fishery Management Plan for Atlantic Striped Bass, which is
“To perpetuate, through cooperative interstate fishery management, migratory stocks of striped bass; to allow commercial as well as recreational fisheries consistent with the long-term maintenance of a wide historic menstruum structure, a self-sustaining spawning stock; as well as also to render for the restoration as well as maintenance of their essential habitat.”
Thus, it was a fleck perplexing when, at the Oct 2017 coming together of ASMFC’s Striped Bass Management Board, Ms. Nicole Lengyei, piece presenting the study of the Striped Bass Technical Committee, said
“…The electrical flow F target as well as threshold are those that volition maintain the populations at the SSB target as well as threshold.
“Again, you lot tin see…that F is good below both the target as well as threshold, equally of the 2016 assessment. There is a tradeoff betwixt preserving spawning stock biomass as well as allowing fishing. As nosotros only heard, the Board has raised draw organization that the electrical flow biological reference points may hold out equally good conservative; for diverse biological, ecological, as well as socioeconomic reasons, as well as may hold out restricting line-fishing unnecessarily. The electrical flow management objectives as well as acceptable risk levels were set out inwards Amendment half-dozen to the striped bass FMP dorsum inwards 2003. The [Technical Committee] as well as [Stock Assessment Subcommittee] posed to the Board several questions. Is the Board satisfied with the electrical flow management objectives, as well as acceptable risk levels, equally set out inwards Amendment 6? Does the Board desire to deal the stock to maximize yield, maximize grab rates, maximize the availability of trophy fish, as well as what is the acceptable grade of risk when it comes to preventing stock collapse?”
Ms. Lengyei, speaking for the Technical Committee, suggested that the Management Board
“Develop as well as number a survey for the Board to attempt preferred management for management, as well as preferred residual betwixt spawning stock biomass as well as F…”
The results of such survey could as well as thus hold out used to render guidance to those preparing the stock assessment, who mightiness retain the electrical flow reference points, should that hold out the guidance, or instead educate less conservative reference points, should the guidance hold out to position greater emphasis on electrical flow harvest, as well as less on maintaining the long-term wellness of the stock.
There is no query that the Management Board has the powerfulness to alter the goals as well as objectives of the striped bass management plan. But i tin easily query whether it is currently next the appropriate path to arrive at so.
As noted yesteryear Capt. John McMurray, the legislative proxy from New York, inwards an objection raised at the meeting,
“…[I]f nosotros arrive at create upward one's heed to revise the goals as well as objectives that were established inwards Amendment6, as well as set an emphasis on yield at the expense of opportunity, I’m pretty sure enough that needs to hold out at to the lowest degree an addendum, perchance an amendment…
“My draw organization hither is that the populace acquire a jeopardy to weigh inwards on this; because I could enjoin you lot with some certainty that the New York recreational line-fishing populace is non going to hold out okay with taking on to a greater extent than risk. We actually arrive at postulate to consider the populace when nosotros arrive at nd
However, McMurray’s concerns were given piddling consideration, they were essentially brushed off with the comment that
“The meetings volition hold out opened upward to the public, thus equally you lot go through this procedure they volition guide hold input through the procedure for that.”
But that’s non actually true.
There’s a large departure betwixt traveling perhaps hundreds of miles to sit down inwards the audience at a Management Board coming together (most are held inwards Alexandria, Virginia), where you lot volition hold out given a really limited chance to render whatsoever comment at all, as well as beingness given a total chance to render written as well as oral comments at a site reasonably closed to home, equally would hold out the illustration if an addendum or amendment was proposed.
If the Management Board is considering an activeness that may really good alter the nub philosophy of the fishery management plan, as well as abandon management principles that guide hold been inwards place—after long debate as well as deliberation—for 15 years, the populace should hold out allowed every possible chance to weigh in.
That’s especially of import now, because it seems that the Management Board itself doesn’t know what it wants to do. The survey contemplated final Oct was inwards fact prepared as well as sent out but, equally ASMFC reports,
“the survey was unable to position an overwhelming bulk regarding overall satisfaction with management of striped bass nether Amendment half-dozen (including the management triggers), or with the electrical flow reference points.”
However,
“Across all respondents, ‘managing F to maintain an historic menstruum construction that provides adequate spawning potential to sustain long term abundance of striped bass populations’ stood out equally the most of import management objective. ‘Broad historic menstruum construction with high abundance of larger, older fish’ as well as ‘high abundance of marketplace size fish’ were with the top iii factors of a lineament as well as feasible fishery across all respondents.”
Of those iii preferred factors, solely the final is arguably inconsistent with the electrical flow goal of Amendment half-dozen equally good equally the electrical flow reference points. Even inwards the illustration of the 3rd factor, “high abundance of marketplace sized fish,” it could easily hold out argued that the electrical flow reference points are most probable to assure continued abundance of such “market sized fish,” fifty-fifty if those reference points would preclude the harvest of such fish from increasing substantially.
The lack of clear bulk back upward for whatsoever management objective inconstant with the electrical flow goal as well as reference points, the full general understanding on the postulate to maintain a resilient as well as well-stratified spawning stock as well as the Management Board’s clear moral, if non legal, obligation to allow total populace participation inwards whatsoever determination to alter Amendment 6’s electrical flow goal, militates against whatsoever alter inwards the electrical flow reference points absent a populace mandate.
Unfortunately, at that topographic point is no guarantee that ASMFC volition agree.
Thus, anglers are well-advised to rest on top of the issue, as well as inform their ASMFC representatives of their preferences as well as concerns earlier the Management Board meets on May 1.