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Oceana Takes Action to Reduce Wasted Catch in East Coast Gillnet Fisheries

An illegal Moroccan drift gillnet boat hauls in a sea turtle. (Photo: Oceana / Jesus Renedo) Last month, Oceana submitted a proposal aimed at reducing the amount of wasted catch in New England and Mid-Atlantic gillnet fisheries, which throw away 16 percent of their total catch every year. Show More Summary

Ocean Roundup: Orcas Can Shift Vocal Sounds around Dolphins, Larval Fish Found to Make Noise, and More

Orcas were found to engage in cross-species vocal learning. (Photo: Courtesy of Dr. Brandon Southall, NMFS/OPR / Flickr Creative Commons) - Humans, cetaceans, and some birds are some of the only species known to practice vocal learning—communicating with sounds that aren’t just innate. Show More Summary

Impact of elevated CO2 concentrations on the growth and ultrastructure of non-calcifying marine diatom (Chaetoceros gracilis F.Schütt)

The impacts of different CO2 concentrations on the growth, physiology and ultrastructure of noncalcifying microalga Chaetoceros gracilis F.Schütt (Diatom) were studied. We incubated Ch. gracilis under different CO2 concentrations, preindustrial...Show More Summary

L’acidification des océans aura d’importantes conséquences pour la biodiversité (in French)

Le fait est encore relativement méconnu du grand public : le changement climatique n’est pas la seule conséquence des émissions humaines de dioxyde de carbone (CO2). Celles-ci sont aussi responsables de l’acidification des océans, phénomène qui aura des conséquences importantes sur la biodiversité marine d’ici à la fin du siècle. Show More Summary

Scientists sound alarm over ocean acidification

Ocean acidification has risen by a quarter since pre-industrial times as a result of rising carbon emissions, casting a shadow over the seas as a future source of food, scientists warned on Wednesday. In the past two centuries, the sea’s acidity level has risen 26 percent, mirroring the proportion of carbon dioxide it absorbs from […]

Could the acid–base status of Antarctic sea urchins indicate a better-than-expected resilience to near-future ocean acidification?

Increasing atmospheric carbon dioxide concentration alters the chemistry of the oceans towards more acidic conditions. Polar oceans are particularly affected due to their low temperature, low carbonate content and mixing patterns, for instance upwellings. Show More Summary

10-5-14 Heading West At A Casual Pace

Sunday, October 5th...ever have one of those days?...leave too soon or late, turn left when you should have turned right...etc, etc...well that's how my day started......I'm heading down to see if I can find whales who might have come in last night...get a call, "you at the park?"..."no, should I be?"... Show More Summary

An Updated Synthesis of the Impacts of Ocean Acidification on Marine Biodiversity, Secretariat of the Convention on Biological Diversity

The Convention on Biological Diversity (CBD) has been working on the elaboration of a systematic review document on the impacts of ocean acidification on biodiversity and ecosystem functions. An updated synthesis has been prepared with the support of a group of international experts and is now available online. The report was launched today within the […]

Small Crabs Play a Big Role as Corals’ First Line of Defense from Predators

A crab (Trapezia sp.) defends its coral host. (Photo: Richard Ling / Flickr Creative Commons) Just as some people have their own sorts of protections from intruders, some corals have their own creative defenses to guard them from predation. Show More Summary

Offshore Wind Advancements Take the Stage at AWEA Conference

An offshore wind farm in the North Sea. (Photo: ©MEDVIND/Bent Sørensen/DONG Energy A/S) The U.S. offshore wind industry has picked up great momentum over the past year. To highlight recent advancements, the American Wind Energy Association...Show More Summary

Ocean Roundup: Cause of Green Sea Turtle Tumors Discovered, Sharks Found to Have Distinct Personalities, and More

Nitrogen runoff is causing tumors to grow on green sea turtles (Chelonia mydas) around Hawaii. (Photo: Oceana / Eduardo Sorensen) - Scientists have detected a 40 percent decline in calcium carbonate in one section of the Great Barrier Reef near Lizard Island. Show More Summary

Reminder: session on ocean acidification at the 2014 MARES Conference, 17-21 November, Portugal

Registration deadline: October 10, 2014! The Mares Conference on Marine Ecosystems Health and Conservation will take place in Olhão, Portugal, from 17 to 21 November 2014. Registration closes next Friday (10 October 2014). This international...Show More Summary

Fish failing to adapt to rising carbon dioxide levels in ocean

Spiny damselfish study suggests it would take at least several generations for fish to start coping with climate change. Rising carbon dioxide levels in oceans adversely change the behaviour of fish through generations, raising the possibility that marine species may never fully adapt to their changed environment, research has found. The study, published in Nature […]

Effects of elevated CO2 on fish behaviour undiminished by transgenerational acclimation

Behaviour and sensory performance of marine fishes are impaired at CO2 levels projected to occur in the ocean in the next 50–100 years, and there is limited potential for within-generation acclimation to elevated CO2 (refs 6, 7). However, whether fish behaviour can acclimate or adapt to elevated CO2 over multiple generations remains unanswered. We tested […]

Ocean acidification modulates the response of two Arctic kelps to ultraviolet radiation

The combined effects of ocean acidification and ultraviolet radiation (UVR) have been studied in the kelps Alaria esculenta and Saccharina latissima from Kongsfjorden (Svalbard), two major components of the Arctic macroalgal community, in order to assess their potential to thrive in a changing environment. Show More Summary

New Government Report Exposes Oversight Gaps in Offshore Drilling Regulators

Oil rigs near Horn Island, Mississippi, USA, pictured during an Oceana Latitude Gulf of Mexico Expedition in 2010. (Photo: Oceana / Carlos Suárez) A recent report from the Office of Inspector General (OIG) within the Department of the Interior has revealed some condemning information about the oversight of offshore drilling operations. Show More Summary

Chile Becomes First South American Nation to Tax Carbon

A power plant in Ventanas, Chile. (Photo: Oceana) Late last month, Chile became the first nation in South America to tax carbon dioxide (CO2) emissions. The new tax—$5 per ton of CO2 emitted—targets 50 megawatt or higher fossil fuel-emitting power plants, while smaller plants and those fueled by renewable sources will remain exempt. Show More Summary

Ocean Roundup: Fish Finding It Difficult to Adapt to Climate Change, Oceans Warmer Than Thought, and More

Spiny damselfish (Acanthochromis polyacanthus). Juvenile spiny damselfish are having a difficult time adjusting to climate change. (Photo: Nikita / Wikimedia Commons) - New research shows that fish aren’t quickly adapting to climate change, and it may take them several generations to do so. Show More Summary

Scientists say ‘ocean degradation is fact’

Ocean acidification is fact, not theory, and collaboration and adaptation are key to tackling this crisis. That was the conclusion of local shellfish growers, marine managers and scientists who gathered in early September in Friday Harbor. Convened by the San Juan Marine Resources Committee, with support from the Northwest Straights Initiative, Puget Sound Partnership and […]

Catfish sharks on catnip? Nope, just ocean acidification

Article explained: Green L. & Jutfelt F., 2014. Elevated carbon dioxide alters the plasma composition and behaviour of a shark. Biology Letters 10(9):20140538. Ocean acidification and fish behavior As the concentration of carbon-dioxide in Earth’s atmosphere increases, the concentration of carbon-dioxide in oceans also increases. Show More Summary

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