Preliminary Marine Recreational Information Program data for
all of the 2022 season has recently been released. It contains some bad news
for striped bass. Last year’s
recreational harvest was about double the harvest in 2021.
When harvest is measured in pounds, rather than in individual
fish, the increase in 2022 landings is even more striking. Last year, anglers landed 35,271,130 pounds
of bass, an amount 123% above the 15,781,509 pounds landed in 2021. Release mortality is not calculated in
pounds, but only in fish, and so is not included in the foregoing figures. (For those who might be wondering, no one
believes that fishery managers can actually count every last bass caught,
released, or harvested by recreational fishermen. The figures provided are merely point
estimates embedded in a range of values, defined by the “percent standard error”
or “PSE.” Actual catch, etc. is expected
to fall somewhere within that range. The
PSEs for all estimates provided herein fall somewhere between 7.8 and 9.3, which indicates a relatively high level of precision.)
By comparison,
commercial landings for 2021 were 577,363 fish, weighing approximately
4,290,000 pounds. Commercial
landings for 2022 have not yet been released, but given that the entire commercial
quota, including both the Chesapeake Bay and ocean fisheries, is 5,412,802 pounds,
there is a hard cap on how high such landings might go. There is no cap on the recreational fishery.
With such a startling increase in recreational landings, the
next question must be whether such increase will impact the recovery of
the overfished striped bass stock.
The answer, as unsatisfactory as it might be, is that it is still too early to know.
We’re now looking at a situation in which landings have
roughly doubled—a little less than doubled, if measured in fish, and significantly
more than doubled, if measured in pounds—but it’s important to realize that
such increase does not equate to a doubling of the fishing
mortality rate. Despite the sharp
increase in landings, it is possible—although probably not likely—that the
fishing mortality rate has hardly increased at all.
That’s because fishing mortality is calculated as an annual rate
of removals, and not merely as the absolute number of fish taken out of the
population. To calculate such rate, one
must know not only how many fish were removed from the population, but how big
the population was in the first place.
Even those two values don’t provide all of the information
that’s needed, because different segments of the striped bass population experience different levels of fishing mortality. Striped
bass less than 18 inches long are universally safe from legal harvest, so the
only fishing mortality that they experience comes from illegal
landings and release mortality. On the
other hand, bass between 28 and 35 inches long may be harvested just about everywhere,
although there are a few exceptions and, in some places, closed seasons apply.
The concept of fully-recruited fishing mortality, which
is used when calculating striped bass removal rates, explains why the 2021 and
2022 landings are not directly comparable—the population of fish deemed to be “fully
recruited” changes from year to year.
The 2015 year class of striped bass represents the strongest year class produced in the past decade. While some of the 2015s grew faster than others, and entered the coastal slot limit prior to 2022, the majority of the 2015 year class could not be legally harvested in most places until last season. Thus, while landings increased in 2022, the influx of 2015s into the fishery caused the population of bass used to calculate the fishing mortality rate to increase as well.
At the same
time, fish from the 2011 year class, which was also large, were growing out of
the top end of the slot, and so were no longer a part of the generally fishable
population.
Thus, until the Atlantic Striped Bass Technical Committee takes
all of the factors into consideration and calculates the 2022 fishing mortality
rate, we won’t know for certain how last year's landings will impact rebuilding.
At the same time, we can make a few informed guesses.
It seems pretty likely that fishing mortality was higher in
2022 than it was in 2021; it’s probably safe to predict that both the 0.14
fishing mortality rate, and the 78.6% chance of rebuilding the stock by 2029,
now belong to the past.
Beyond that, preditions get harder to make. While I think that the fishing mortality rate
increased in 2022, it’s hard to guess where it might have ended up. My gut tells me that there’s a good chance—probably
a better than even chance—that fishing mortality exceeded the target. I wouldn’t be surprised if the striped bass was again experiencing overfishing, but at the same time, I also wouldn’t be surprised if the fishing
mortality rate remained below the threshold.
Without technical guidance, it’s impossible to know for
sure.
The other thing that we can’t yet know is how the ASMFC’s Atlantic
Striped Bass Management Board is going to respond to the increased recreational
landings.
“I looked at the MRIP landings, and they are up considerably
this year. There is only one way we can
react as a Board to low recruitment, and that’s maintaining an increasing
[spawning stock biomass]. If in fact the
retrospective is right and we’re a little bit higher and some of the other
uncertainty and landings are up. We may
in fact be at the threshold already, after this year…
“But the main reason we are in this situation is we have
never hit our target [fishing mortality rate], at least for a prolonged period
of time. To prevent that we need to know
what [the fishing mortality rate] is. I
would advocate for something, either an update, or what Katie [Drew, of the
Atlantic Striped Bass Technical Committee] was talking about, to kind of give
us an idea within one year of where we’re at.
That’s because mostly of the recruitment. We need to get [spawning stock biomass] up,
which may not work, but that’s all we can do.”
After some discussion, the Management Board and ASMFC staff
came to a general agreement that the Technical Committee would compare the
projected 2022 catch level needed to maintain the 0.14 fishing mortality rate with
the actual 2022 landings. If the actual landings were
significantly above the projections, the Board might either take some sort of
management action, or wait until the next stock assessment update was released
late in 2024.
Dr. Armstrong wasn’t altogether pleased with the latter alternative, saying
“I don’t know quite how to react to that, other than you know
we’re not locked in…if we find that landings are high, and projected to go
above [the fishing mortality rate], we could always cut harvest without a
quantitative assessment. I could sit
here and make a motion and say, let’s cut harvest by 10 percent.
“I don’t know what it will do. It may cause people to go crazy. But I just think we’re in a spot that we need
to react. That being said, stocks don’t
collapse overnight. But with 4 years of
poor recruitment, we’re approaching that point, in my mind…”
So the stage is set for the Management Board to act when it
meets in May.
At that point, the Technical Committee will be able to
provide it with a comparison of 2022 landings to the landings projections
contained in the last stock assessment update.
If the landings are well above the projection, I strongly suspect that
someone, very possibly Dr. Armstrong, will move to place additional harvest
restrictions in place. I also suspect
that some Management Board members will be very opposed to such motion.
At that point, the Management Board will have a choice. It could decide to take preemptive action, in
the absence of a formal stock assessment update, to keep the striped bass stock
on a path to timely rebuilding. Or it
could decide to sit on its hands and do nothing, and instead wait for the next
stock assessment update to be released late in 2024 which, unless managers vote
to fast-track the process, would probably result in no management changes becoming
effective before the 2026 season.
If excessive fishing mortality continued through 2025, the 2029
rebuilding deadline would probably be completely out of reach.
If low recruitment accompanies such high fishing mortality, the striped bass might stand on--or even beyond--the the brink of the stock collapse that Dr. Armstrong hopes to avoid.
The Management Board's May meeting could well turn out to be one of those critical times,
when the health of the striped bass stock hinges on a single vote.
We can only hope that any such vote goes the right way.