Atlantic bluefin tuna are corralled by fishing nets off the coast of Barbate, Cadiz province, southern Spain. Two studies by environmental groups say overfishing of the Atlantic continues, in part because quotas are too high.

Atlantic bluefin tuna are corralled by fishing nets off the coast of Barbate, Cadiz province, southern Spain. Two studies by environmental groups say overfishing of the Atlantic continues, in part because quotas are too high. Some estimates say bluefin tuna have declined by over 90% in the past 100 years.
Photo Credit: Emilio Morenatti/Associated Press

Marine life in crisis, world ocean disaster looming?

A new report by the World Wildlife Fund international paints an extremely worrisome picture for the future of the oceans, and for humanity’s future.

The WWF report is called the “Living Blue Planet Report-species, habitat and human well-being”  

In the opening line the report states, “Our ocean – that seemingly infinitely bountiful, ever awe-inspiring blue that defines our planet from space – is in crisis”

Almost 50% decline in marine populations in just 40 years

The WWF compiles a “Living Planet Index” (LPI) and in this report for marine species, it shows a decline in populations of 49 per cent between 1970 and 2012 (Figure 1).

The LPI for marine life is based on trends in 5,829 populations of 1,234 mammal, bird, reptile and fish species.  The data included many more species and locations than its previous 2014 report being almost twice as large and giving an even clearer picture of ocean health — and the decline is even greater than previously described.

The utilized fish index declined 50 per cent between1970 and 2010 White line indicates decline, shaded area indicates confidence limits (margin of error). Other graphs in the report for specific species and regions show a similar or greater decline.
The utilized fish index declined 50 per cent between1970 and 2010 White line indicates decline, shaded area indicates confidence limits (margin of error). Other graphs in the report for specific species and regions show a similar or greater decline. © Fig2- WWF ZSL report 2015

Nearly 3 billion people worldwide depend on fish as their primary source of nutrition.  Millions of people all around the world also depend on fishing for their livelihood in a multi-billion dollar industry.  As species decline and catches diminish,  livlihoods and food supplies are increasingly threatened.

The United Nations Food and Agricutlure Organization  has reported as far back as 2005  that 75 percent of the world’s fish stocks were already being caught at their maximum sustainable level, or were being overfished, or were already being depleted.

A fin whale lies dead on Kodiak Island, Alaska. At least 30 whales washed up on the coasts of Alaska and B.C. this summer, and scientists are blaming a toxic algae bloom. The say the algae is toxic, and consumed by krill which are then eaten by the whales, pisoning them. Marine species are being threatened on several sides; from overfishing, to pollution, warming, and acidificaton from greenhouse gas Co2
A fin whale lies dead on Kodiak Island, Alaska. At least 30 whales washed up on the coasts of Alaska and B.C. this summer, and scientists are blaming a toxic algae bloom. The say the algae is toxic, and consumed by krill which are then eaten by the whales, pisoning them. Marine species are being threatened on several sides; from overfishing, to pollution, warming, and acidificaton from greenhouse gas Co2 © Bree Witteveen/The Associated Press

As an example, the UNFAO report of 2014 stated, “Catches of tuna and tuna-like species set a new record of more than 7 million tonnes in 2012. The annual global catch of the sharks, rays and chimaeras species group has been about 760 000 tonnes since 2005. In 2012, capture production of shrimp species registered a new maximum at 3.4 million tonnes, and the total catch of cephalopods exceeded 4 million tonnes.”  http://www.fao.org/3/a-i3720e.pdf

BBC- 2012- Are we running out of fish

EESI- Aug 2015 -Ocean warming, algae, killing whales and seals

The Guardian- Sept 2015-bluefin tuna

Bloomberg News, June 2015- Chilean sea bass

Over-exploitation of fish stocks compounds ocean damage from climate change. Trawlers with enromous nets, or many kilometres of long-lines, take enormous loads, catching not only the fish they're after but everything else in their path.
Over-exploitation of fish stocks compounds ocean damage from climate change. Trawlers with enromous nets, or many kilometres of long-lines, take enormous loads, catching not only the fish they’re after but everything else in their path. © John Wallace / NOAA via Wikimedia Commons

“Our sense of the oceans’ power and omnipotence—   combined with scientific ignorance—   contributed to an assumption that nothing we did could ever possibly impact it,” writes contributing author, Kathy Auth who wrote the chapeter on Ocean resilience at risk “Over the years, scientists and environmental leaders have worked tirelessly to demonstrate and communicate the fallacy of such arrogance.

Greenpeace divers hold up a banner that reads
Greenpeace divers hold up a banner that reads “No fish No future” next to a fish aggregation device (FAD). Around 10% of the catch generated by purse seine FAD fisheries is unwanted by-catch and includes endangered species of sharks and turtles © Paul Hilton-Greenpeace

The Worldwatch report concludes: “There is no question that scholars and scientists who study the human economy, the Earth and the interactions between them are drawing profoundly troubling conclusions…It is time for Homo sapiens sapiens to live up to its somewhat presumptuous Latin name, and grow up.”

Worldwatch Institute- State of the world 2015- Video #3 of 8

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