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Measuring Trawling Effort- AIS MMSI

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Post Options Post Options   Thanks (0) Thanks(0)   Quote ncshellfish Quote  Post ReplyReply Direct Link To This Post Posted: 25 July 2017 at 5:35pm
When a "stakeholder" starts talking about two mile long haul seines that makes everything else he says suspect. 

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Post Options Post Options   Thanks (0) Thanks(0)   Quote TomM Quote  Post ReplyReply Direct Link To This Post Posted: 25 July 2017 at 6:45pm
Can't confirm 2 miles but can at least 1 mile. Behind Frisco Buxton 80s 90s. All the smaller fish were thrown over and west wind pushed them to shore- helluva stench. Even some of locals were dropping motor blocks😂 They pretty much would sterilize an area. That started the end of gtrout.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote chriselk Quote  Post ReplyReply Direct Link To This Post Posted: 26 July 2017 at 5:59am
Brad, are you defending long hauls seines now?  Thank goodness there are few of them nowadays.
The above comments are my personal opinion and do not represent those of any organizations or agencies I may be a member of.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ray Brown Quote  Post ReplyReply Direct Link To This Post Posted: 26 July 2017 at 8:33am
Brad....

Animal Farm is fiction, very much like Wetland Riders. There is an element of truth surrounded by deep, deep prejudices in order to sell books.

If I were to ever have to wear and ankle bracelet I have no doubt it would be because I did something that made me a concern of society.   We make our own bed. That can range from infidelity, to fishing out of season, to assault, but what we create, we live in. Everything we do, good or bad, has consequences, and if we are doing something with the assets of others then it is their decision, not mine or yours, as to whether what we are doing is good or bad.

As far as AIS is concerned; it is public information and since fish are public assets too, then using AIS to determine effort is not at all an unreasonable end result.



Edited by Ray Brown - 26 July 2017 at 8:34am
I am a native of NC. The "bycatch captial of the east coast of the US". Our legislature lets us kill more fish for no reason than any other Atlantic Coast state. I hope they are proud.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote cnaff Quote  Post ReplyReply Direct Link To This Post Posted: 31 July 2017 at 2:56pm
Brad, you may enjoy the inside scoop to who knows the story from all sides, but evidence piles up against the idea that NC commercial operators ever produce conservation of their targeted species, whether for their own professional sustainability, or for that of the habitat they rely upon. I question the reasonableness of the state doling out "farming rights" to operators such as yourself to engage in exclusive production of a species known to be in extremis with regard to population viability in THIS estuary. Your sympatico with the crooked eel dealers up north bodes well for continuation of the black hand which so reliably allocates the resource to those most disinclined to share it in such a way in that others might touch and smell it outside a fish house chain of supply. As a free market guy, it's tough for me to accept that the independent small time fisherman should have to be dogged by incessant regulation and control, but the bigger players such as yourself give the lie to the industry -as -environmental steward. It, and you, are not any damn better than the coastal residents and visitors you blithely cheat of resources you have taken. Your anti-intelligent thrust here is cute, but surely your bibliography and data sources are derelict or nonexistent, or is it your lost recollections of gear in the water are too far downstream for it to matter........ Just like your proclamation that seines don't exceed the mile mark.:By 1852, the Select Committee on Fisheries reported that North Carolina’s rivers which were once overflowing with shad in the springtime were now virtually empty. The fishery had been abandoned on most of the principle rivers. Only the Chowan River and Albemarle Sound could the commercial shad fisherman still be found, according to the Select Committee’s report “where seins are used of more than a mile in length and thousands of drag and set nets dot over the waters in every direction” – all desperately clinging to a fish and a way of life that they had come to destroy.

Edited by cnaff - 01 August 2017 at 8:19am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote cnaff Quote  Post ReplyReply Direct Link To This Post Posted: 01 August 2017 at 8:40am
So BRAD, how does one go about receiving the privilege to produce threatened species in the NC estuary where the population in the wild is known to be in significant decline? I suppose you will be restocking the estuary from the comfort of your captain's chair, bolted to the floor of your office, the position of honor in your highly esteemed dotage. If I were you, I wouldn't want to discuss the fact that the equally imperious government (to myself), struggles to revive certain runs of fish that I and like minds destroyed in waves over the whole of our history. Similarly, I would point out how damned healthy this estuary is(despite some conspicuously ABSENT and collapsed species of marketable value), and suggest that anyone concerned about these facts be thought of as ignorantly uninformed, and surely has no stake in the fishery. Where have you gone, great respected elder statesman of a generation we may well elevate to godly status, who knew no, and could do no, wrong?

Edited by cnaff - 01 August 2017 at 8:42am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rick Quote  Post ReplyReply Direct Link To This Post Posted: 17 January 2018 at 6:38pm
Good Stuff!

Maybe one day on the Pamlico Sound!!!


Bright Lights Reveal the “Dark” Fleet

A new partnership between Global Fishing Watch and NOAA matches
night-time imagery with monitoring data from fishing vessels.

January 16, 2018: Global Fishing Watch has entered into a new data-sharing partnership with the U.S. National Oceanic and Atmospheric Administration (NOAA) to improve understanding of the activity of fishing vessels in Indonesian waters. Through the partnership, Global Fishing Watch and NOAA are matching Vessel Monitoring System (VMS) data from the Indonesian government with NOAA’s satellite based Visible Infrared Imaging Radiometer Suite (VIIRS), which reveals the locations of brightly lit vessels at night. The idea is to identify fishing vessels that are not picked up by other monitoring systems and to test and refine the use of VIIRS for identifying and distinguishing different types of fishing vessels.

By cross matching VMS from Indonesia with VIIRS, the team found that roughly 80 percent of VIIRS detections could not be correlated to a vessel broadcasting VMS. The vast majority of these vessels are likely to be fishing vessels using bright lights to attract fish. While a small number may be other types of vessels, most ships do not use lights bright enough for detection. This work indicates that the addition of VIIRS data can greatly enhance transparency in commercial fishing in Indonesia.

The team believes most of the VIIRS detections are from fishing vessels not required to carry VMS because they are under the 30 gross ton (GT) threshold established by the government of Indonesia. It is also possible that some vessels detected only by VIIRS meet the size requirement but have switched off their VMS or have a faulty device. Another possibility is that VIIRS is detecting foreign boats that are not carrying VMS because they are poaching from Indonesian waters.

“I’m excited for this opportunity to see the dark fleet,” said David Kroodsma, Global Fishing Watch Research Program Director. The dark fleet being a common term used to describe vessels that don’t show up in vessel monitoring systems and therefore are said to operate in the dark. “NOAA’s VIIRS data shows us vessels we can’t see by any other means and helps us to gain a more complete picture of fishing activity.”

Global Fishing Watch detects nearly all large fishing vessels in Indonesian waters by combining Indonesia’s VMS data and publicly broadcast AIS data which is required on vessels exceeding 300 GT. Global Fishing Watch can even tell when vessels turn off their monitoring devices. But the system is unable to see vessels when they are not broadcasting either AIS or VMS. Incorporating VIIRS, which represents a completely new source of data, into the Global Fishing Watch database and, eventually, the public mapping platform, will reveal the activity of even more of the world’s commercial fishing fleet.

To cross match VMS and VIIRS, NOAA’s Earth Observation Group developed an orbital model that predicts the probable location of each VMS-broadcasting vessel at the time of the VIIRS data collection. The model checks the predicted location against the actual VIIRS detections to define matches. Prior to the partnership with Global Fishing Watch, NOAA had access to two months of Indonesia VMS data, which they used to develop their cross-matching algorithm.

The partnership with Global Fishing Watch has provided three years-worth of Indonesian VMS data, which NOAA has now matched to its VIIRS vessel detections. In addition, the partnership has provided NOAA with valuable information on vessel gear types and identification numbers in the VMS records.

This new data is enabling NOAA to calculate the frequency of VIIRS boat detections for the different fishing gear types and to work towards a calibration for estimating wattage from the VIIRS detected radiance. “When I saw what Global Fishing Watch could provide in the data, I said, Wow, that could really help us a lot, because we don’t have access to this information in any other way,” said Chris Elvidge, NOAA’s Earth Observation Group Lead. His team is creating an atlas of fishing grounds for Indonesia using the three years of VMS provided by Global Fishing Watch and multiple years of VIIRS data.

Global Fishing Watch is able to provide the VMS data because of its partnership with Indonesia, which began publicly sharing their VMS through the Global Fishing Watch platform in June 2017. They are the first nation to take such bold steps toward transparency, and Peru has recently signed an MOU to do the same.

Now that Global Fishing Watch has access to the VIIRS boat detection data they can vastly expand the number of fishing boat records reported in the public database. In addition, it would be possible to cross match VMS or AIS data with VIIRS boat detections to identify “dark vessels” which may be fishing illegally. The combined data sources could also be analyzed to detect clusters of fishing boats straddling international boundaries, or fishing in Marine Protected Areas.

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NC Fisheries Management- Motto: Too Little, Too Late, Too Bad   Slogan: Shrimp On! Mission Statement: Enable Commercial Fishing At Any and All Cost, Regardless of Impact to the Resource.
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