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International Study Finds Indian Ocean Warming Reducing Fish Catch

SEAFOODNEWS.COM [First Post] By Dinesh C Sharma — December 22, 2015 — Even as the world tries to make sense of decisions taken at the recent climate change conference in Paris, scientists have come up with fresh evidence of how global warming is beginning to nibble the food chain right in India’s neighbourhood – the Indian Ocean.

Oceans play a critical role in both short and long term weather and climatic patterns. Nearly 90 percent of extra heat generated due to emission of greenhouse gases from the landmass is absorbed by oceans, warming them up. Indian Ocean, considered one of the most productive seas, has seen warming greater than other oceans. The warming in Indian Ocean during the past century has been estimated up to 1.2 degree C, which is very large compared to a global surface warming of up to 0.8 degree C during the same period.

Now an international study led by scientists from Pune-based Indian Institute of Tropical Meteorology (IITM) has shown that the warming of Indian Ocean is affecting productivity of its marine eco system. Simply put, the food web necessary for fish production in the seas is getting affected due to the warming. This, in turn, is resulting in dwindling fish catch rates in the Indian Ocean.

The decline in phytoplankton- microscopic plants that are part of the aquatic food web – is significant. Phytoplankton contains chlorophyll and provides food for a range of sea creatures including fish. The rapid warming in the Indian Ocean has played an important role in reducing the phytoplankton up to 20 percent during the past six decades, the study has reported.

This story originally appeared on SeafoodNews.com, a subscription site. It has been reprinted with permission.

WAITT INSTITUTE: Top 15 Ocean Conservation Wins of 2015

The Waitt Institute is a non-profit organization based in Washington, DC. It was founded in 2005 by Ted Waitt (co-founder of Gateway Computers) to foster exploration and discovery. The focus of the Waitt Institute has shifted in recent years, and today its mission is “empowering communities to restore their oceans to full productivity.” To achieve this, the Waitt Institute directs its efforts toward fostering deep collaborations with local governments and communities to create comprehensive ocean zoning and management solutions.

December 23, 2015 — Overfishing, climate change, habitat destruction, and pollution remain major threats to the world’s ocean. But amidst all that there is some seriously good ocean conservation news worth celebrating. So, to continue the tradition started last year with listing 14 Ocean Conservation Wins of 2014, here’s a rundown for 2015 that will hopefully fill you with #OceanOptimism. These wins represent the diligent efforts of organizations and individuals too numerous to list, so let’s just start with a blanket shoutout to all of #TeamOcean for a great year.

#1. Over 2 million km² of ocean was protected in big new marine reserves. Marine reserves are areas completely closed to fishing, and 2015 saw more ocean protected in a single year than ever before. Chile created Desventuradas Marine Park (297,000 km²), and Easter Island Marine Park 631,000 km²). New Zealand created Kermadec Ocean Sanctuary (620,000 km²), Palau created Palau National Marine Sanctuary (500,000 km²), the UK announced the Pitcairn Island Reserve (833,000 km²), and protected areas are in the works for Patagonia. However, there is a broad consensus that 30% of the ocean should be fully protected in reserves, and these new designations only get us up to 1% – but we’ll take it!

#2. New technology is being developed to combat illegal fishing. Designating all these new reserves means little without enforcement, and we can’t enforce unless we know what’s happening out on the water. One big tech effort launched this year is Global Fishing Watch, a partnership between Skytruth, Google, and Oceana to track fishing vessels and identify illegal fishing. Another similar program is the Pew Charitable Trust’s Virtual Watch Room. These technologies are in prototype phase and need significant improvement before they live up to expectations, but it’s a promising and exciting development.

#3. Illegal fishing boats are being chased down and caught! Sea Shepherd chased a pirate fishing boat on Interpol’s most wanted list for 10,000 miles, until the boat sank (potentially on purpose to drown the evidence of illegal fishing). Another boat was chased for four days, caught, and fined $2 million for illegally fishing in the Phoenix Islands Protected Area. Blackfish and Environmental Justice Foundation have also been stepping up to make sure enforcement happens, but hopefully we can soon rely on law enforcement organizations, not environmental groups, to do this work.

Read the full story from the Waitt Institute at National Geographic

Ciguatera fish poisoning predicted to increase with rising ocean temperatures

December 2, 2015 — The following was released by NOAA Fisheries:

A new NOAA study, published in the journal Ecological Modeling, forecasts an increase in ciguatera fish poisoning in the Gulf of Mexico and the U.S. Southeast Atlantic coast with predicted rising global ocean temperatures due to climate change.

Ciguatera-causing algae are abundant in the Caribbean, and ocean warming would enable some of those species to move northward, increasing its presence in the Gulf of Mexico and U.S. southeast Atlantic. Warmer temperatures could also mean larger and longer blooms of harmful algae, including those that produce ciguatoxins.

In the Caribbean, Gambierdiscus are already near the top of their preferred temperature range. Higher temperatures are likely to inhibit the growth of these cells, slightly decreasing the risk of ciguatera in the Caribbean.

“This is another example of how we can use NOAA’s observing and forecasting expertise to anticipate and prepare for environmental change and its impact on coastal communities and economies,” said Mary Erickson, director of NOAA’s National Centers for Coastal Ocean Science, which conducted the research. “It contributes to NOAA’s larger efforts to build a ‘climate-smart’ nation resilient to climate and weather extremes, and long-term changes.”

For this study, researchers projected water temperatures in the greater Caribbean through the year 2099, based on 11 global climate models and data from NOAA buoys in the Caribbean and Gulf of Mexico. Forecasted temperature changes were then used to project the effects of ocean warming on the growth, abundance and distribution of two groups of ciguatera-causing algae (Gambierdiscusand Fukuyoa).

People can be affected by ciguatera, the most common form of algal-induced seafood poisoning, by eating contaminated tropical marine reef fish such as grouper, snapper and barracuda. The fish can become contaminated with ciguatoxins, potent neurotoxins produced by Gambierdiscus, a microscopic algae common in the tropics.

More than 400 fish species are known to become toxic. In U.S. waters, ciguatera occurs in Hawaii, Guam, southern Florida, Puerto Rico, the U.S. Virgin Islands, and occasionally in the Gulf of Mexico, extending around the southeast U.S. coast as far north as North Carolina. Ciguatera impedes development of fisheries resources in many regions of the world. Toxins produced by Gambierdiscus contaminate marine animals such as corals and seaweeds, and the carnivores that feed upon them, causing toxins to move into the food chain.

“Contaminated fish have no specific taste, color, or smell and there is no easy method for measuring ciguatoxins,” said Steve Kibler, a NOAA scientist and the study’s lead author. “However, we can forecast risk based on where and when we are likely to find the algae that produce ciguatoxins.” The forecast will allow communities to target monitoring, saving resources by focusing only on areas and times when ciguatera is likely to be present.

Color micrograph of Gambierdiscus carolinianus, an algae species widely distributed in the Caribbean, Gulf of Mexico, and the southeast Atlantic coast that produces ciguatoxins. Ciguatera, the most common form of algal induced seafood poisoning, is contracted from the human consumption of tropical marine reef fish contaminated with ciguatoxins.(Credit: NOAA).

This work is part of a larger NOAA effort to develop and implement practical, affordable, and sustainable strategies for managing the risk of ciguatera. Next steps include determining which species are producing the toxins and developing and transferring monitoring technology to managers and researchers in tropical countries around the world.

The ciguatera forecast is part of a NOAA ecological forecasting initiative that aims to deliver accurate, relevant, timely and reliable ecological forecasts directly to coastal resource managers and the public as part of its stewardship and scientific mandates for coastal, marine and Great Lakes resources.

This research was conducted by scientists from NOAA, North Carolina State University, and Ocean Tester LLC.

NOAA’s National Centers for Coastal Ocean Science delivers ecosystem science solutions to facilitate stewardship of the nation’s coastal and ocean resources while sustaining thriving coastal communities and economies.

NOAA’s mission is to understand and predict changes in the Earth’s environment, from the depths of the ocean to the surface of the sun, and to conserve and manage our coastal and marine resources. Join us on Facebook, Twitter, Instagram and our other social media channels.

Marine Invasive Species Benefiting from Rising Carbon Dioxide Levels

November 6, 2015 — Ocean acidification may well be helping invasive species of algae, jellyfish, crabs and shellfish to move to new areas of the planet with damaging consequences, according to the findings of a new report.

Slimy, jelly-like creatures are far more tolerant of rising carbon dioxide levels than those with hard structures like corals, since exposed shells and skeletons simply dissolve away as CO₂ levels rise.

The study, conducted by marine scientists at Plymouth University, has found that a number of notorious ‘nuisance’ species – such as Japanese kelp (Undaria pinnatifida) and stinging jellyfish (Pelagia noctiluca) are resilient to rising CO₂ levels. Published in Research and Reports in Biodiversity Studies, it notes that in the tropics, coral reefs face a host of interconnected problems (bleaching, corrosion, disease, spreading seaweed, invasive species) that are all caused by rising CO₂ levels.

Read the full story from Alaska Native News

NOAA chief tells lawmaker: No one will ‘coerce the scientists who work for me’

November 24, 2015 — The Obama administration is continuing to resist efforts by a top House Republican to gain access to the internal deliberations of federal scientists who authored a groundbreaking global warming study the lawmaker is investigating.

In response to a threat from House Science Committee Chairman Lamar Smith (R-Tex.) to subpoena Commerce Secretary Penny Pritzker, the head of the National Oceanic and Atmospheric Administration told Smith in a letter Friday that her staff will not be influenced by political interference.

“I have not or will not allow anyone to manipulate the science or coerce the scientists who work for me,” Administrator Kathryn Sullivan wrote.

“If the committee doubts the integrity of the study,” Sullivan wrote, “it has the tools it needs to commission a competing scientific assessment.”

Sullivan was responding to Smith’s claim last week that the climate study, published in June in the peer-reviewed journal Science, was “rushed to publication” over the objections of some NOAA scientists.

Read the full story at the Washington Post

House science panel demands more NOAA documents on climate paper

November 5, 2015 — It’s getting hot in here. A dispute between the chairman of the U.S. House of Representatives Committee on Science, Space, and Technology and the National Oceanic and Atmospheric Administration (NOAA) over a climate change paper published this summer is escalating. The latest salvos include a second letter from Representative Lamar Smith (R–TX) to NOAA Administrator Kathryn Sullivan seeking internal communications and documents authored by NOAA employees and a letter from the American Meteorological Society condemning Smith’s demands and warning about its implications for all federally funded research.

The quarrel began with a paper by NOAA scientists published 5 June in Science that revised historical atmosphere and ocean temperature data records found to have been poorly calibrated. In 2013 the Intergovernmental Panel on Climate Change had noted that the temperature data seemed to suggest that global warming had slowed down beginning around 1998. But the Science paper showed that apparent slowdown in global warming vanished when the data were corrected to account for various sources of bias.

That paper immediately caught Smith’s attention, triggering multiple committee requests for data and methodologies related to the study. NOAA told the committee that the findings were already publicly available and met twice with committee staff to brief them on the results.

But that response didn’t satisfy Smith. On 13 October, he subpoenaed all of NOAA’s internal emails related to the paper, asking for the information by 27 October. In response, the committee’s Democrats wrote to Smith on 23 October, noting that the subpoena “appears to be furthering a fishing expedition” and saying that it oversteps the committee’s bounds, as the paper is a research study and not a policy decision. House Republican leadership this year had given Smith the authority to issue subpoenas without the consent of the minority party.

Read the full story at Science Insider

Climate change hurting New England cod population, study says

October 29, 2015 — The rapid warming of the waters off New England has contributed to the historic collapse of the region’s cod population and has hampered its ability to rebound, according to a study that for the first time links climate change to the iconic species’ plummeting numbers.

Between 2004 and 2013, the mean surface temperature of the Gulf of Maine — extending from Cape Cod to Cape Sable in Nova Scotia — rose a remarkable 4 degrees, which the researchers attributed to shifts in the ocean currents caused by global warming.

The study, which was released Thursday by the journal Science, offers the latest evidence of climate change — this time, affecting a species once so plentiful that fishermen used to joke that they could walk across the Atlantic on the backs of cod.

Fisheries management officials have sharply limited cod fishing in hopes of protecting the species, but they estimate the number of cod remain at as little as 3 percent of what would sustain a healthy population. The limits, in turn, have hurt fishermen.

“Managers [of the fishery] kept reducing quotas, but the cod population kept declining,” said Andrew Pershing, the study’s lead author and chief scientific officer of the Gulf of Maine Research Institute in Portland. “It turns out that warming waters were making the Gulf of Maine less hospitable for cod, and the management response was too slow to keep up with the changes.”

The institute had reported last year that the rise in temperatures in the Gulf of Maine exceeded those found in 99 percent of the world’s other large bodies of saltwater. The authors of Thursday’s study link the rapid warming to a northward shift in the Gulf Stream and changes to other major currents in the Atlantic and Pacific oceans.

They say the warmer water coursing into the Gulf of Maine has reduced the number of new cod and led to fewer fish surviving into adulthood. Cod prefer cold water, which is why they have thrived for centuries off New England.

The precise causes for the reduced spawning are unclear, the researchers said, but they’re likely to include a decline in the availability of food for young cod, increased stress, and more hospitable conditions for predators. Cod larvae are View Story eaten by many species, including dogfish and herring; larger cod are preyed upon by seals, whose numbers have increased markedly in the region.

Read the full story at the Boston Globe

US Proposed International Agreement to Prevent Unregulated Arctic Fishing

WASHINGTON — August 31, 2015 — While commercial fishing is not yet occurring in the central Arctic Ocean, Kerry said that unregulated fishing could “ramp up soon” as ice sheets melt due to global warming.

“The United States is proposing an international agreement to prevent unregulated fishing for the time being,” Kerry said at an international Arctic summit in Alaska.

Read the full story from Sputnik News

Lobster population shifting north as ocean temps warm

August 18, 2015 — The lobster population has crashed to the lowest levels on record in southern New England while climbing to heights never before seen in the cold waters off Maine and other northern reaches — a geographic shift that scientists attribute in large part to the warming of the ocean.

The trend is driving lobstermen in Connecticut and Rhode Island out of business, ending a centuries-old way of life.

Restaurant diners, supermarket shoppers and summer vacationers aren’t seeing much difference in price or availability, since the overall supply of lobsters is pretty much steady.

But because of the importance of lobsters to New England’s economy, history and identity, the northward shift stands as a particularly sad example of how climate change may be altering the natural range of many animals and plants.

“It’s a shame,” said Jason McNamee, chief of marine resource management for Rhode Island’s Division of Fish and Wildlife. “It’s such a traditional, historical fishery.”

In 2013, the number of adult lobsters in New England south of Cape Cod slid to about 10 million, just one-fifth the total in the late 1990s, according to a report issued this month by regulators. The lobster catch in the region sank to about 3.3 million pounds in 2013, from a peak of about 22 million in 1997.

Read the full story from the Associated Press at the Portland Press Herald

Extreme diving, crucial to Arctic research

August 16, 2015 — How do algae react to the warming of the Arctic Ocean? How is it affecting wildlife in the fjords? To find answers, researchers rely heavily on divers who brave the icy waters to gather samples.

“Without them, we wouldn’t be able to successfully complete our projects,” admits Cornelia Buchholz, a marine biologist who is working at Ny-Alesund on Spitsbergen, the largest island of the Svalbard archipelago in the heart of the Norwegian Arctic.

Until the start of the 1960s, this town — the northernmost permanent human settlement in the world — was populated by coal miners.

Today it is entirely dedicated to science.

Between mid-April and the end of August when the sun never sets, dozens of researchers stay there.

The site, which boasts exceptional facilities despite its extreme location just a thousand kilometres (600 miles) from the North Pole, has a unique window on climate change, the effects of which are far more pronounced in the Arctic region.

Under water at Ny-Alesund, rising sea temperatures have already led to the appearance of new species of krill (small crustaceans) and fish, such as Atlantic cod and mackerel.

Read the full story from the Agence France-Presse at Yahoo News