The examination and characterization of DFG recovered from
shorelines, shallow water, and pelagic environments would assist
in both modeling debris movement and selecting appropriate sensors
for direct detection. While examination of DFG collected in
nearshore environments is useful and can be done systematically,
the masses of DFG that wash onto the Northwestern Hawaiian
Islands (NWHI) coral reefs and shorelines may have been tangled
in the surf zone or during their passage over coral reefs; nets and
lines may also be torn into smaller fragments as they are driven
over reefs by wind and wave action (Donohue et al., 2001). For this
reason, the identified actions include collecting DFG systematically
from pelagic sources and measuring the characteristics that affect
optical properties and movement. This particular activity may be
accomplished in cooperation with marine debris encounter reporting
by fisheries observers on the Hawaii longline fishing fleet or by
other cooperating vessels that collect DFG at sea. This type of
collection is preferred because the DFG would be in a pelagic environment,
similar to that in which direct detection would be
attempted. Hawaii longline fishermen do collect some DFG that
fouls their active fishing gear (Morishige, personal observation).
This collection is opportunistic, and the DFG that fouls longline
gear and is recoverable by the longline fleet may be biased, e.g.,
toward a certain size. Nonetheless, further collaboration with the
Hawaii longline fleet may be one of the most fruitful avenues to
pursue in the short term to rapidly obtain additional data on DFG
characteristics.
A more systematic gathering of similar data from
The examination and characterization of DFG recovered fromshorelines, shallow water, and pelagic environments would assistin both modeling debris movement and selecting appropriate sensorsfor direct detection. While examination of DFG collected innearshore environments is useful and can be done systematically,the masses of DFG that wash onto the Northwestern HawaiianIslands (NWHI) coral reefs and shorelines may have been tangledin the surf zone or during their passage over coral reefs; nets andlines may also be torn into smaller fragments as they are drivenover reefs by wind and wave action (Donohue et al., 2001). For thisreason, the identified actions include collecting DFG systematicallyfrom pelagic sources and measuring the characteristics that affectoptical properties and movement. This particular activity may beaccomplished in cooperation with marine debris encounter reportingby fisheries observers on the Hawaii longline fishing fleet or byother cooperating vessels that collect DFG at sea. This type ofcollection is preferred because the DFG would be in a pelagic environment,similar to that in which direct detection would beattempted. Hawaii longline fishermen do collect some DFG thatfouls their active fishing gear (Morishige, personal observation).This collection is opportunistic, and the DFG that fouls longlinegear and is recoverable by the longline fleet may be biased, e.g.,toward a certain size. Nonetheless, further collaboration with theHawaii longline fleet may be one of the most fruitful avenues topursue in the short term to rapidly obtain additional data on DFGcharacteristics.A more systematic gathering of similar data from
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
The examination and characterization of DFG recovered from
shorelines, shallow water, and pelagic environments would assist
in both modeling debris movement and selecting appropriate sensors
for direct detection. While examination of DFG collected in
nearshore environments is useful and can be done systematically,
the masses of DFG that wash onto the Northwestern Hawaiian
Islands (NWHI) coral reefs and shorelines may have been tangled
in the surf zone or during their passage over coral reefs; nets and
lines may also be torn into smaller fragments as they are driven
over reefs by wind and wave action (Donohue et al., 2001). For this
reason, the identified actions include collecting DFG systematically
from pelagic sources and measuring the characteristics that affect
optical properties and movement. This particular activity may be
accomplished in cooperation with marine debris encounter reporting
by fisheries observers on the Hawaii longline fishing fleet or by
other cooperating vessels that collect DFG at sea. This type of
collection is preferred because the DFG would be in a pelagic environment,
similar to that in which direct detection would be
attempted. Hawaii longline fishermen do collect some DFG that
fouls their active fishing gear (Morishige, personal observation).
This collection is opportunistic, and the DFG that fouls longline
gear and is recoverable by the longline fleet may be biased, e.g.,
toward a certain size. Nonetheless, further collaboration with the
Hawaii longline fleet may be one of the most fruitful avenues to
pursue in the short term to rapidly obtain additional data on DFG
characteristics.
A more systematic gathering of similar data from
การแปล กรุณารอสักครู่..
