Satellite imagery has dragged "dark" fishing fleets out into the light.
Orbital observations have revealed extensive illegal fishing of Pacific flying squid (Todarodes pacificus) in the Pacific Ocean around Russia, Japan and North and South Korea in 2017 and 2018, a new study reports.
In fact, "extensive" may not be a strong enough word. More than 900 vessels of Chinese origin probably violated United Nations sanctions by fishing in North Korean waters in 2017, and another 700 did the same in 2018, the study found.
Related: 50 breathtaking images from Earth's oceans
These scofflaw ships likely hauled in more than 176,000 tons (160,000 metric tons) of Pacific flying squid over those two years, a catch worth about US $440 million, study team members said. That's nearly equivalent to the combined T. pacificus catch of Japan and South Korea over the same span.
"The scale of the fleet involved in this illegal fishing is about one-third the size of China's entire distant-water fishing fleet," said study co-lead author Jaeyoon Park, a senior data scientist at Global Fishing Watch, an international nonprofit organization dedicated to increasing ocean sustainability via greater transparency.
"It is the largest known case of illegal fishing perpetrated by vessels originating from one country operating in another nation's waters," Park said in a statement.
Park and his colleagues tracked fishing activity in the Pacific around the Koreas, Japan and Russia, a big patch of poorly monitored ocean.
Many of the vessels plying these waters are dark, meaning they don't publicly broadcast their positions and don't show up in monitoring databases. So the researchers got a bird's-eye view, studying the region using four different types of satellite information.
For example, the researchers pored through Automatic Identification System (AIS) data, which is designed to help ships keep tabs on traffic in their area and avoid collisions. AIS signals stream continuously from transponders on ships, and these signals are often detected via satellite. But many ships don't beam out AIS signals, and the ones operating illegally are very unlikely to do so.
The team also looked at optical imagery gathered by Earth-observing satellites operated by San Francisco-based company Planet. The researchers analyzed wide-field photos captured by Planet's shoebox-sized Dove cubesats, as well as targeted imagery from larger, sharper-eyed SkySats.
Related: Photos of Earth by Planet satellites
In addition, Park and his colleagues scrutinized data from the Visible Infrared Imaging Radiometer Suite (VIIRS) instrument aboard Suomi NPP, a satellite operated jointly by NASA and the U.S. National Oceanic and Atmospheric Administration. VIIRS can spot brightly lit ships at night, which makes it well suited to hunt squid boats; these vessels usually operate after dark, drawing squid up from the depths with huge banks of very bright lights.
The researchers also used synthetic-aperture radar (SAR) imagery to hunt for large metal vessels in the region. The team used SAR data from several different satellites: the European Space Agency's Sentinel-1, the Japanese Space Exploration Agency's PALSAR-2, and RADARSAT-2, which is operated by the company Kongsberg Satellite Services.
Combining all of this information allowed the team to determine the extent of illegal fishing in the area something that had never been done on this scale, team members said.
"These novel insights are now possible thanks to advances in machine learning and the rapidly growing volume of high-resolution, high-frequency imagery that was unavailable even a couple of years ago," co-author David Kroodsma, Global Fishing Watch research and innovation director, said in the same statement. "We've shown we can track industrial fishing vessels that are not broadcasting their locations."
The new study, which was published online today (July 22) in the journal Science Advances, suggests that the illegal vessels pose a significant threat to the management of the T. pacificus fishery. That fishery is extremely valuable T. pacificus is the top seafood by production value in South Korea, and one of the top five seafoods eaten in Japan and it's on an unsustainable trajectory. Since 2003, reported catches of T. pacificus have dropped by 80% and 82% in South Korean and Japanese waters, respectively, study team members said.
"Global fisheries have long been dominated by a culture of unnecessary confidentiality and concealment. Achieving a comprehensive view of fishing activity is an important step toward truly sustainable and cooperative fisheries management, and satellite monitoring is a key part of the solution," co-author Quentin Hanich, an associate professor at the Australian National Center for Ocean Resources and Security at the University of Wollongong, said in the same statement.
"This analysis represents the beginning of a new era in ocean management and transparency," Hanich added.
The team also determined that about 3,000 North Korean ships fished illegally in Russian waters in 2018, likely pushed so far afield by competition with the illegal Chinese vessels in their own backyard. Most of the North Korean boats are small and made of wood, and therefore not designed for such long open-ocean voyages.
Indeed, hundreds of North Korean fishing vessels have washed up on Japanese and Russian shores in recent years, study team members said.
"The consequences of this shifting effort for North Korean small-scale fishers are profound, and represent an alarming and potentially growing human rights concern," study co-author Katherine Seto, an assistant professor of environmental studies at the University of California, Santa Cruz, said in the same statement.
Mike Wall is the author of "Out There" (Grand Central Publishing, 2018; illustrated by Karl Tate), a book about the search for alien life. Follow him on Twitter @michaeldwall. Follow us on Twitter @Spacedotcom or Facebook.
Read more:
Satellites uncover widespread illegal fishing in Pacific Ocean - Space.com
- Space | National Archives - January 5th, 2017 [January 5th, 2017]
- 50 Years of Presidential Visions for Space Exploration - January 30th, 2017 [January 30th, 2017]
- New 'Life' Trailer Brings Terrifying Thrills from Mars (Exclusive) - Space.com - February 7th, 2017 [February 7th, 2017]
- Obama gutted NASA. Here are 3 ways Trump can make space ... - Conservative Review - February 7th, 2017 [February 7th, 2017]
- Dassault Systemes sets eyes on space exploration, faster transport - Economic Times - February 7th, 2017 [February 7th, 2017]
- Cassini Captures Stunning View of Enceladus | Space Exploration ... - Sci-News.com - February 7th, 2017 [February 7th, 2017]
- Space Exploration: Astronauts' Brains Are Changed By Spaceflight, MRI-Based Study Reveals - International Business Times - February 7th, 2017 [February 7th, 2017]
- TeamIndus launches Moonshot Wheels to inspire Indian rural students about Space Exploration - International Business Times, India Edition - February 7th, 2017 [February 7th, 2017]
- Belarus invites Iran to cooperate in pharmaceutical industry, space exploration - Belarus News (BelTA) - February 8th, 2017 [February 8th, 2017]
- Cabinet briefed on India-Vietnam Framework Agreement on outer space exploration - Daily News & Analysis - February 9th, 2017 [February 9th, 2017]
- Legislation Would Require Strategic Plan for NASA Human Spaceflight - Space.com - February 9th, 2017 [February 9th, 2017]
- Trump's Vision of Space Exploration - The New American - February 10th, 2017 [February 10th, 2017]
- New NASA Leadership Inherits Rejuvenated Space Exploration Program - eNews Park Forest - February 10th, 2017 [February 10th, 2017]
- Outgoing NASA Team Leaves Its Successors With Robust Options for Space Exploration - Center For American Progress - February 11th, 2017 [February 11th, 2017]
- Space exploration brought to life for pupils - Norfolk Eastern Daily Press - February 11th, 2017 [February 11th, 2017]
- Mechs and greater space exploration are on the way in Starbound's ... - PCGamesN - February 12th, 2017 [February 12th, 2017]
- As US, Russia eye stagnant space budgets, India ramps up investment - Ars Technica - February 13th, 2017 [February 13th, 2017]
- Nuclear Reactors to Power Space Exploration - R & D Magazine - February 14th, 2017 [February 14th, 2017]
- NASA spends $2mn on 'advanced life support tech' for deep space travel - RT - February 15th, 2017 [February 15th, 2017]
- Space Exploration: Could A Habitable Planet Feature A Habitable Moon? - Forbes - February 16th, 2017 [February 16th, 2017]
- Turkmenistan Aims High as It Pledges Space Exploration - EurasiaNet - February 17th, 2017 [February 17th, 2017]
- Republicans Aim to Prioritize NASA Space Exploration Efforts Over Environmental Research - Independent Journal Review - February 18th, 2017 [February 18th, 2017]
- One huge step: Trump's plans to privatize 'low Earth orbit' and send NASA into deep space - Yahoo News - February 18th, 2017 [February 18th, 2017]
- How reusable rockets are paving the way for the next phase of space exploration - Mirror.co.uk - February 20th, 2017 [February 20th, 2017]
- NASA Funds 2 New Research Institutes to Help Humanity Explore Deep Space - Space.com - February 21st, 2017 [February 21st, 2017]
- Space Startups Are Booming in the Mojave Desert - Fortune - February 21st, 2017 [February 21st, 2017]
- Sen. Nelson Talks Space Exploration At Florida A&M University ... - WFSU - February 22nd, 2017 [February 22nd, 2017]
- DELINGPOLE: NASA to Stop Shilling for Big Green, Restart Exploring Space - Breitbart News - February 23rd, 2017 [February 23rd, 2017]
- Nuclear reactors to power space exploration - Los Alamos Monitor - February 23rd, 2017 [February 23rd, 2017]
- Space exploration programs must continue - The Eagle - February 23rd, 2017 [February 23rd, 2017]
- Editorial: Exploration can help us understand this planet - Loveland Reporter-Herald - February 24th, 2017 [February 24th, 2017]
- NASA selects new technologies for flight tests for future space exploration - Space Daily - February 24th, 2017 [February 24th, 2017]
- Why Does NASA Suddenly Want Humans On New Spacecraft's First Flight? - Vocativ - February 24th, 2017 [February 24th, 2017]
- NASA seeks university-level solutions for deep space human exploration challenges - Pulse Headlines - February 24th, 2017 [February 24th, 2017]
- Should Humans Leave Space Exploration To Robots? - Forbes - February 24th, 2017 [February 24th, 2017]
- Space Exploration - WGN Radio - February 25th, 2017 [February 25th, 2017]
- EDITORIAL: Jumping at space travel - Indiana Daily Student - February 27th, 2017 [February 27th, 2017]
- Why the 'ultimate wearables' lie in the future of space exploration - Wareable - February 28th, 2017 [February 28th, 2017]
- How to improve SA's space program - News24 - March 1st, 2017 [March 1st, 2017]
- Darlington power plant helps fuel NASA's space exploration - CTV News - March 1st, 2017 [March 1st, 2017]
- Donald Trump Will Call For a Return of Human Space Exploration - Inverse - March 1st, 2017 [March 1st, 2017]
- What Donald Trump Said About Space Travel During His Speech - Heavy.com - March 2nd, 2017 [March 2nd, 2017]
- Trump's call for human space exploration is hugely wasteful and pointless - Los Angeles Times - March 2nd, 2017 [March 2nd, 2017]
- What is the fascination with space exploration? - Grand Valley Lanthorn - March 2nd, 2017 [March 2nd, 2017]
- Teachers attend space exploration conference, bring back lessons out of this world - Arlington Times - March 4th, 2017 [March 4th, 2017]
- Reader applauds space exploration pioneers - Fairfaxtimes.com - March 4th, 2017 [March 4th, 2017]
- Jeff Bezos Expected to Unveil Further Plans for Private Space Exploration - Wall Street Journal (subscription) - March 6th, 2017 [March 6th, 2017]
- Your Cheat-Sheet Guide to the New Space Race - Slate Magazine - March 7th, 2017 [March 7th, 2017]
- Amazon chief to announce new space exploration plans - RT - March 7th, 2017 [March 7th, 2017]
- Amazon Chief Bezos Expected to Unveil Further Private Space Exploration Plans - Fox Business - March 7th, 2017 [March 7th, 2017]
- If India or China Beats the US to Mars, It Will Feel Like a Military Defeat - Slate Magazine - March 8th, 2017 [March 8th, 2017]
- When We Explore Space, We Go Together - Slate Magazine - March 8th, 2017 [March 8th, 2017]
- How Barack Obama ruined NASA space exploration - The Hill (blog) - March 9th, 2017 [March 9th, 2017]
- Future Tense Newsletter: Space Exploration Isn't Just About Scientific Discovery - Slate Magazine (blog) - March 9th, 2017 [March 9th, 2017]
- NASA Funds 133 Projects to Aid Deep Space Exploration - PC Magazine - March 9th, 2017 [March 9th, 2017]
- A Trinity professor will play a big role in space exploration - thejournal.ie - March 11th, 2017 [March 11th, 2017]
- Congress Passes Space Exploration Act, Targets Mars - America Now - March 11th, 2017 [March 11th, 2017]
- Russia Aims to Develop New Cooperation in Space Exploration - Sputnik International - April 8th, 2017 [April 8th, 2017]
- NASA Announces 2017 'Chroniclers,' Recognizing Those Who ... - SpaceCoastDaily.com - April 8th, 2017 [April 8th, 2017]
- The Pros And Cons Of Privatizing Space Exploration - Forbes - April 8th, 2017 [April 8th, 2017]
- Space Exploration Experts Look to Next Frontiers at Event - UMass Lowell - April 8th, 2017 [April 8th, 2017]
- CNSA boss outlines China's space exploration agenda - SpaceNews - SpaceNews - April 8th, 2017 [April 8th, 2017]
- These Are the Wildly Advanced Space Exploration Concepts Being ... - Gizmodo - April 8th, 2017 [April 8th, 2017]
- Cyprus Space Exploration Organisation - Wikipedia - April 8th, 2017 [April 8th, 2017]
- A Brief History of Space Exploration - The Aerospace Corporation - April 8th, 2017 [April 8th, 2017]
- Americans Like Spending Money on Space Exploration, Survey Finds - Inverse - June 6th, 2017 [June 6th, 2017]
- Launch of India's biggest rocket is a defining moment in space exploration - DailyO - June 6th, 2017 [June 6th, 2017]
- Space Matter: The Trouble with Spacesuits :: Science :: Features ... - Paste Magazine - June 6th, 2017 [June 6th, 2017]
- China willing to cooperate in peaceful space exploration: Xi - Space Daily - June 6th, 2017 [June 6th, 2017]
- Pence reiterates plans to reestablish the National Space Council - SpaceNews - June 7th, 2017 [June 7th, 2017]
- Space Exploration: Can Private Companies Operate in Space? - Law Street Media (blog) - June 7th, 2017 [June 7th, 2017]
- Space Exploration Game 'Outreach' Receives First Gameplay Trailer ... - Hardcore Gamer - June 7th, 2017 [June 7th, 2017]
- Will Space Exploration lead us to a Global Space Agency - Space Daily - June 7th, 2017 [June 7th, 2017]
- The Origami of Space Exploration - Scientific American (blog) - June 7th, 2017 [June 7th, 2017]
- Ocean vs Space: Exploration and the Quest to Inspire the Public - Marine Technology News - June 8th, 2017 [June 8th, 2017]
- A 3D-printed rocket engine just launched a new era of space exploration - The Independent - June 8th, 2017 [June 8th, 2017]
- Belarus' drive for peaceful space exploration underlined - Belarus News (BelTA) - June 8th, 2017 [June 8th, 2017]
- Here's why you should pay close attention to India's space program - Mashable - June 9th, 2017 [June 9th, 2017]
- China to provide more opportunities to private companies for space exploration - Space Daily - June 9th, 2017 [June 9th, 2017]
- Space exploration: The solutions to land scarcity - Real Estate Weekly - June 10th, 2017 [June 10th, 2017]