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Why is this
happening? |
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Nobody can say for sure. But the particular combination of a
population drop coincident with a sudden expansion of foraging territory and an
increase in disease strongly suggests the need for more and better food
sources. If this is indeed the case, these developments are part the natural
cycle that culls predator populations that are out of balance within their
range.
Other ideas have been offered that central California's sea
otters are facing increases in pollution and/or disease pathogens. Considering
that central California's coast is some of the least populated, developed, and
traveled to be found in the state, this possibility only adds to the abundance
of new threats to sea otters as they move into waters south of Pt.
Conception. |
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What new
threats do Sea Otters face south of Pt. Conception? |
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Current sea otter territory is centered between Pt.
Conception and Monterey. This is a spectacularily rugged shoreline famous for
coastal mountains that fall sheer into the sea. It's an area that is largely
undeveloped and sparsely populated. Access to these coastal waters is so
limited and anchorages so few that recreational and commercial fishing, diving,
and boating are comparatively non-existant. Indeed, it was the remoteness and
ruggedness of this area that provided the last refuge for sea otters when they
were being hunted into extinction. In a word, the area is a perfect natural
refuge for sea otters.
South of Pt. Conception, by comparison, is among the worst,
most dangerous places for a sea otter to venture. Those ocean waters are
workplace and playground for one of the largest concentrations of humanity
anywhere on earth. The new hazards sea otters will encounter include busy
offshore boat and shipping traffic, pathogens and pollutants from dense coastal
development and habitation, offshore oil operations, baited fish and lobster
traps, just to name a few. |
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Are there other
problems with California's Sea Otter expansion? |
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There is a concern about sea otter impacts on other species
of marine populations already seriously depressed. Sea otters are stunningly
voracious predators that consume as much as 25% of their body weight each and
every day. Video clips before-/after-sea otters in Cojo
Bay illustrates the impact sea otters have in a new area and raises various
concerns about their range expansion:
- Sea otters and shellfish fisheries cannot co-exist
Where sea otters are established, neither recreational
nor commercial harvest of shellfish is possible. Sea otters simply don't leave
much. There are substantial economic and cultural costs associated with the
loss of crab, mussel, clam, abalone, sea urchin, sea cucumber, and lobster
fisheries to sea otter expansion.
- Southern California abalone are on the verge of
extinction
Human harvesting of abalone south of Pt. Conception was
halted in 1997 through both regulatory and legislative processes. This was in
response to warnings by leading scientists that California was on the verge of
forfeiting the last opportunities for a future recovery of these resources.
Since then, the forseeable future for southern California's abalone has not
improved. White abalone are now a Candidate Species under the Endangered
Species Act making it the first marine invertebrate to begin the listing
process. Now, black abalone are now being seriously considered for the ESA
listing process with strong indications that green abalone will likely follow
suit. All of these species are primarily found south of Pt. Conception.
Shutting down human harvesting south of Pt. Conception
was an attempt to salvage some chance of a future recovery of the abalone
resources. Sea otter expansion into the Southern California Bight, at this
time, dooms every likelihood of any future recovery.
- Sea otters south of Pt. Conception is now allowed
under federal law
As a result of a project designed and supported by U.S.
Fish and Wildlife and Friends of the sea otter, a federal law was passed that
authorized the experimental relocation of central California sea otters to San
Nicolas Island off southern California. An integral component of this law was
the requirement that the sea otter range along California's mainland be limited
to waters north of Pt. Conception. Recently the USFWS declared the experiment a
failure and abandoned any future attempts at containing sea otter
expansion.
|
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Isn't human
activit y to blame for shellfish declines in Sea Otter
territory? |
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For the past few decades, no.
Certain species of shellfish off central California were
subject to the pressures of human harvest before sea otters were a factor.
Human activity very likely deserves most of the blame for the initial collapse
of the central California abalone fishery, in particular. But, for more than 2
decades now, human harvesting of abalone along the central California coast has
been effectively reduced to zero. During that same period, sea otter pressure
alone has been enough to prevent recovery of the abalone fisheries.
It is also important to note that certain shellfish
resources within sea otter territory (sea urchins and sea cucumbers) have never
been subjected to pressures from human harvesting. North and south of sea otter
territory, these resources support a lucrative commercial fishery. In between,
sea otter predation alone preempts all commercial harvesting. |
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Don't Sea
Otters and Shellfish co-exist? |
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Shellfish exist as a healthy, localized component of the
environment within sea otter territory where sufficient cryptic habitat
exists to provide some protection against predation. In those large expanses of
central California's underwater terrain where cryptic habitat is limited and
sea otters are common, most marine invertebrate species are comparatively rare
to encounter.
Before the modern era, with its explosive populations and
coastal industry, shellfish resources existed in sufficient quantities to be a
significant food source for the native coastal residents. This was also a
period when those coastal residents are believed to have also preyed on sea
otters. The result would have been a buffer zone between humans on-/near-shore
and sea otters farther out or in more remote locations. Modern observations
would suggest the buffer zones provided refuges sufficient to replenish and
maintain the stocks of prey species. |
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Aren't Sea
Otters entitled to this expansion? |
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There's a lot of emotional appeal to the idea that humans
exploited sea otters into near extinction during the 1700s and 1800s so that,
today, there's some collective moral obligation to assist in their recovery.
The appeal of this perspective is undoubtedly enhanced by the fact that sea
otters are so damn cute (there certainly doesn't seem to be any equivalent
sense of obligation and mission when it comes to turning Kansas City back over
to the buffalo or reestablishing healthy concentrations of Grizzly Bears
throughout California).
But approximately 2000 sea otters currently "own" most of
central California's coastal waters. That's a lot of coastline. How much is
enough? What price is reasonable to pay to add to California's sea otter
population? Does that price include the loss of other species? Or total
elimination of human consumption of California shellfish? |
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Where did the
idea of limiting Sea Otter ranges come frome? |
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A scientific and environmental fiasco known as the San
Nicolas Sea Otter Translocation Experiment was devised by the U.S. Fish and
Wildlife Service with political support provided by Friends of the Sea Otter.
The result became federal
Public Law 99-625.
The motivation behind PL99-625 was to relocate some of central California's sea
otters to San Nicolas Island off southern California to provide a hedge against
the possibility that a central California oil spill (or other environmental
disaster) might threaten the entire sea otter population off central
California.
Vigorous opposition to the San Nicolas Sea Otter
Translocation Experiment was mounted by commercial abalone divers and some
segments of the recreational dive community. The basis for the opposition was
the potential loss of southern California's shellfish resources and the
consequent loss of social, recreational, and economic components to southern
California's coastal communities and culture.
A "compromise" was proposed by the proponents of the
experiment: sea otters found south of Pt. Conception (other than nearshore
waters off San Nicolas Island) would be rounded up, as soon as weather
conditions would allow, and moved back to the central California coast.
"Containment" was embraced by U.S. Fish and Wildlife Service as a key component
of the experiment. Teams would be setup and trained in procedures needed for
capturing wild sea otters. An 800- telephone number would be available to
report wayward sea otters. When objections were raised about the practicality
of this compromise proposal, opponents were vilified by Friends of the sea
otters. Containment, they maintained, was a reasonable compromise.
In the end, PL99-625 became law in 1986. |
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What is the
status of the San Nicolas Sea Otter translocation experiment? |
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By even the most charitable assessment, it is a dismal
failure. 139 sea otters were captured, 8 died in captivity before they could be
released at San Nicolas Island, and, of the remaining 131: 35 were found back
on the central California coast from which they were originally taken, 3 took
up residence of at San Miguel Island, 16 remained at San Nicolas, and 77 are
"whereabouts" unknown. It's entirely probable that this grand experiment killed
up to 60% of its threatened-status subjects.
Little wonder, then, that the minutely detailed
WEB history pages for
Friends of the Sea Otter conspicuously omits the major role their organization
played implementing the Translocation Experiment. Instead, you can find a
position statement that the Translocation Experiment should be abandoned.
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What is the
U.S. Fish and Wildlife Service doing about Sea Otter expansion south of Pt.
Conception? |
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At a February 1999 presentation before the California Fish
and Game Commission, Mike Spears detailed the two courses of "action" being
taken by the U.S. Fish and Wildlife Service:
- Evaluation of the failure criteria of PL99-625.
If U.S. Fish and Wildlife Service can declare the
Translocation Experiment a failure, the "management zone" (California waters
south of Pt. Conception) no longer exists. Without a "management zone", USFWS
has no long-term obligation to maintain that area otter free. The only
inconvenience to this approach is a one time PL99-625 requirement that the
"management zone" be cleared of sea otters if the Translocation Experiment is
declared a failure. Unless...
- Section 7 analysis of the Endangered Species Act.
Section 7 of the Endangered Species Act makes it illegal
to take action that will likely result in the deaths of an endangered species.
During the late 1980s translocation to San Nicolas Island, eight sea otters
died while in captivity. Though better capture and release techniques have been
developed in the interim, the U.S. Fish and Wildlife Service would like to use
the 1980s fiasco as a basis to selectively override PL99-625.
So... the "actions" by U.S. Fish and Wildlife Service turn
out to be finding a way to carefully take no action. |
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What can we
do? |
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Regardless of which side of the line you position yourself,
you're urged to get involved and communicate your concerns to government
officials. This is a federal issue; the State of California has no
jurisdiction. Federal agencies are notoriously unresponsive and arrogant in
dealing with opposing members of the public. If your inclinations are not
entirely in agreement with the views and plans of the U.S. Fish and Wildlife
Service, you are better off communicating your concerns to your senators and
congressman/woman in the U.S. congress. The easiest way to get their names and
addresses is to look in your telephone book; in California, you'll find the
information in the Blue section under Government Officials. On-line, you can
access CapWeb's search
utility. |
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