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New governance model needed for sustainable fisheries

Trawl nets grab any and all forms of marine life, laying waste to the ocean floor. The total area bottom trawled is nearly 150 times the area of forest that is clearcut annually around the world. Credit: Sarah Foster

Trawl nets grab any and all forms of marine life, laying waste to the ocean floor. The total area bottom trawled is nearly 150 times the area of forest that is clearcut annually around the world.
Credit: Sarah Foster

Focus on large commercial fishing operations misses big part of the picture

Staff Report

FRISCO — Ignoring small-scale fisheries risks irreversible harm to ocean ecosystems, scientists warned this week, calling for on governments to adopt new models for regulating small coastal fishing operations that account for about 90 percent of the world’s fishers — about 100 million strong.

Most of those fishermen depend on the ocean for their livelihoods and many catch fish and other marine animals at unsustainable levels. Governments, conservationists, and researchers around the world must address the enormous threat posed by these unregulated and destructive fisheries, marine scientists wrote in Science. Continue reading

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GAO report finds lagging response to ocean acidification

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Ocean acidification is an existential threat to many marine species and ecosystems.

Federal government has failed to implement several key steps required by 2009 law

By Summit Voice

FRISCO — Federal agencies well recognize the environmental threats of increasing ocean acidification, but so far, the response has been lackluster at best, according to the Government Accountability Office.

In a report issued this week, the GAO said federal agencies have been slow in implementing several requirements of the 2009 Federal Ocean Acidification Research and Monitoring Act, including outlining the budget requirements for implementing the research and monitoring plan. Continue reading

Fish swimming toward poles as fast as they can to escape global warming

Study projects major shifts in species richness patterns

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A map from the new University of British Columbia study shows the current distribution of species richness based on data going back to the 1950s.

Staff Report

FRISCO — Many fish species are racing away from the equator and toward the poles to escape steadily warming ocean temperatures. In a worst-case scenario of unchecked greenhouse gas emissions, many fish will disappear from the tropics by 2050, moving poleward by as much as 26 kilometers per decade.

Under the best-case scenario, where the Earth warms by just 1 degree Celsius, fish would move 15 kilometres every decade, according to a new study by scientists with the University of British Columbia study that examined the impact of climate change on fish stocks. Continue reading

Environment: Report warns against unsustainable exploitation of deep ocean resources

global warming ocean changes

Unchecked exploitation of deep ocean resources could have unforeseen impacts, researchers warn.

Planning should include consideration of deep-ocean ecosystem benefits

Staff Report

FRISCO — Scientists are warning against unchecked exploitation of deep ocean resources in the coming decades, saying that the lack of a regulatory framework for areas outside territorial waters opens the door for unsustainable development.

The analysis, published in Biogeosciences, outline the societal benefits of the deep oceans.

“The deep sea is the largest habitat on Earth, it is incredibly important to humans and it is facing a variety of stressors from increased human exploitation to impacts from climate change,” said Andrew Thurber, an Oregon State University marine scientist and lead author on the study. “As we embark upon greater exploitation of this vast environment and start thinking about conserving its resources, it is imperative to know what this habitat already does for us,” Thurber said. Continue reading

Global warming aids spread of invasive fish in Mediterranean Sea

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A juvenile rabbitfish, an invasive species blamed for wiping out huge areas of ocean habitat. Photo courtesy Zafer Kizilkaya.

Ocean ecosystems at risk from fish that kills algal forests

Staff Report

FRISCO — The spread of invasive tropical fish into previously temperate waters is also affecting the Mediterranean Sea, according to Australian scientist monitoring the spread of rabbitfish which have already devastated algal forests in the eastern Mediterranean Sea.

Global warming may help the fish spread into the entire Mediterranean Basin, researcher warned in a new paper published in the Journal of Ecology (Authors: Dr. Adriana Vergés, of the University of New South Wales, Australia, and Dr. Fiona Tomas of the Mediterranean Institute for Advanced Studies in Spain). Continue reading

Global warming driving invasive lionfish northward

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The lionfish are coming, for better or worse.

New study takes detailed look at changing ocean temperatures

Staff Report

FRISCO — Careful study of ocean temperatures shows how tropical fish are likely to expand northward along the Atlantic coast into the temperate ocean zone off the Carolinas. Invaders could include the poisonous lionfish, which is already causing problems on coral reefs in the Caribbean.

Researchers with NOAA and the University of North Carolina-Wilmington combined year-round bottom water temperature data with 2006-2010 fish community surveys in water depths from 15 to 150 feet off the coast of North Carolina. The study revealed that the fish community was primarily tropical in the deeper areas surveyed, from 122 to 150 feet, with a winter mean temperature of 21 degrees Celsius (69.8 degrees Fahrenheit).

Many of the native tropical fishes, usually abundant in shallow, somewhat cooler reefs, tended to remain in the deeper, warmer water, suggesting that temperature is a main factor in controlling their distribution. The findings were published in the September issue of Marine Ecology Progress Series. Continue reading

Biodiversity: California blue whales make huge comeback

Naval training exercises off the coast of California could pose a threat to endangered marine mammals.

Conservation works! Protective measures have helped restore blue whale populations in the eastern Pacific.

‘We think the California population has reached the capacity of what the system can take as far as blue whales’

Staff Report

FRISCO — Marine scientists say the population of California blue whales, living the eastern side of the Pacific Ocean from the equator up into the Gulf of Alaska, has rebounded to about 2,200 individuals, which may be near the historic pre-whaling level.

According to the new study, published the journal Marine Mammal Science, it’s the only population of blue whales known to have recovered from whaling after being nearly hunted to extinction.

“The recovery of California blue whales from whaling demonstrates the ability of blue whale populations to rebuild under careful management and conservation measures,” said Cole Monnahan, a University of Washington doctoral student in quantitative ecology and resource management and lead author of the paper. Continue reading

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