The Rhode Island Department of
Environmental Management has proposed a series of changes to regulations governing
the commercial harvest of horseshoe crabs in Rhode Island waters, but officials
from Save the Bay say the proposal doesn’t go far enough to protect the state’s
horseshoe crab population.
At a hearing before the Rhode Island Marine Fisheries Council on Monday, DEM proposed to implement daily catch
limits, minimum size requirements, tighter reporting rules and a closure of the
fishery during the peak spawning period in the first three weeks of May. While
Save the Bay agrees with most of the changes DEM proposed, the group says that
climate change should be considered in the new regulations.
“The director should recognize that
spawning can occur in April due to warming water temperatures and close the
fishery to protect early spawning,” said Jonathan Stone, executive director of
Save the Bay.
Horseshoe crabs are familiar to
anyone spending time around Rhode Island’s salt marshes and beaches. Ancient
creatures that evolved about 300 million years ago, they have 10 eyes, blue
blood, and are more closely related to spiders and scorpions than to most
marine life.
DEM
issues between 40 and 60 permits each year allowing fishermen to capture
horseshoe crabs. A quota of 14,466 horseshoe crabs were allowed to be harvested
in Rhode Island waters in 2016 for use as bait, primarily in the eel and conch
fisheries. Another 34,000 can be harvested each year for the biomedical industry, which uses the crabs’ copper-based blood in tests to ensure that
medical devices, vaccines and intravenous solutions are free of harmful
bacteria. Most of those captured for the biomedical industry are returned to the
water unharmed.
According
to Scott Olszewski, a marine fisheries biologist at DEM, a horseshoe crab management plan has been in effect since 2000 after crab populations were found to be at
low levels of abundance.
“Based
on our assessment, we had a total allowable catch that should have equated to a
rebuilding schedule to rebuild the stock,” he said. “But the abundance indices
we use to manage the population have continued to show the same signal –
relatively low abundance and no upward trend in the population.”
As
a result, DEM initiated the process to amend the regulations. A workshop and
public hearing in November resulted in proposals from DEM, the horseshoe crab
fishing industry, and Save the Bay.
It
has long been believed that horseshoe crabs crawl up onto beaches to lay their
eggs at high tide on days when the moon is new or full in May, June and July.
To allow the crabs to spawn, the fishery has been closed for the 48-hours
before and after the full and new moon. But new research suggests that water
temperature may be a more important spawning trigger, so DEM proposed closing
the fishery from May 1 to 21, while Save the Bay recommended a closure from
April 15 to May 31.
“Horseshoe
crabs are spawning prior to the closure periods, and that’s when the harvest
pressure is occurring as well,” said Wenley Ferguson, Save the Bay’s director
of habitat restoration, who conducts annual spawning surveys in Warwick and
Cranston. “The bait fishery quota is often exceeded before any lunar closure
even takes place because the crabs are spawning early because of water
temperatures.”
DEM
also proposed that each permitted fisherman be limited to possessing up to 60
horseshoe crabs per day, a strategy that would spread out the catch among the
fishermen and extend the length of the fishing season. In addition, it proposed
that harvested crabs must have a shell size of at least 7 inches.
At
its meeting on Dec. 5, the Rhode Island Marine Fisheries Council – which makes
a recommendation to DEM Director Janet Coit, who makes the final decision – agreed
with the proposals for daily possession limits and minimum crab size (although
the daily possession limits would not apply to the biomedical industry). But it
decided to recommend that the bait fishery be closed during the entire month of
May, a compromise between the DEM and Save the Bay proposals. The biomedical
fishery will retain the lunar closures in May.
Olszewski
said the recommended changes to the regulations will enable DEM to better
manage the fishery.
“We
have a relatively small bait fishery, and what usually happens is the landings
come in at a very rapid pace,” he said. “We try to anticipate when we’re going
to reach the threshold, but you get harvesters that land a large number of
crabs in a short period of time, so it’s been hard to manage the quota.
“The
idea [with the proposed regulations] is to promote equity among the
participants in the fishery and allow Marine Fisheries to better manage the
allowable catch,” he added.
Ferguson
agrees with DEM’s objectives, but notes that “we should at least protect the
horseshoe crabs during the spawning period so they have a chance to spawn
before they’re harvested.” To do that, she said, “we should really be considering
climate change.”
Coit
will make a decision soon on the final regulations, which will go into effect
on January 1.
This article first appeared on EcoRI.org on Dec. 12, 2016.
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