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Marine Biology News   :: ScienceDaily

Lessons in coral reef survival from deep time

Lessons from tens of millions of years ago are pointing to new ways to save and protect today's coral reefs and their myriad of beautiful and many-hued fishes at a time of huge change in the Earth's systems. Today's complex relationship between fishes and corals developed relatively recently in geological terms -- and is a major factor in shielding reef species from extinction, say experts.

Carbon dioxide is 'driving fish crazy'

Rising human carbon dioxide emissions may be affecting the brains and central nervous system of sea fishes with serious consequences for their survival, an international scientific team has found. Carbon dioxide concentrations predicted to occur in the ocean by the end of this century will interfere with fishes' ability to hear, smell, turn and evade predators, says a professor.

Multiple partners not the only way for corals to stay cool

For the first time scientists have shown that corals hosting a single type of zooxanthellae can have different levels of thermal tolerance -– a feature that was only known previously for corals with a mix of zooxanthellae. This finding is important because many species of coral are dominated by a single type of zooxanthellae.

Inventory lists 19,232 newly discovered species during latest count

More than half of the 19,232 species newly known to science in 2009, the most recent calendar year of compilation, were insects -- 9,738 or 50.6 percent -- according to the 2011 State of Observed Species.

Breakthrough model reveals evolution of ancient nervous systems through seashell colors

Determining the evolution of pigmentation patterns on mollusk seashells -- which could aid in the understanding of ancient nervous systems -- has proved to be a challenging feat for researchers. Now, however, through mathematical equations and simulations, researchers have used 19 different species of the predatory sea snail Conus to generate a model of the pigmentation patterns of mollusk shells.

Wandering albatross alters its foraging due to climate change

Wandering albatrosses have altered their foraging due to changes in wind fields in the southern hemisphere during the last decades. Since winds have increased in intensity and moved to the south, the flight speed of albatrosses increased and they spend less time foraging. As a consequence, breeding success has improved and birds have gained 1 kilogram.

Can we save the whales by putting a price on them?

Every year, anti-whaling groups spend millions of dollars on activities intended to end commercial whaling. And every year, commercial whaling not only continues, but grows. While protests, education, lobbying and dangerous confrontations on the high seas have saved some whales, the whaling industry shows no sign of shutting down -- or slowing down. Now, an economist and two marine scientists suggest a new strategy that they believe could save whales by putting a price on them.

Fish offspring grow best at same temperature as parents

Fish parents can pre-condition their offspring to grow fastest at the temperature they experienced, according to new research.

World's most extreme deep-sea vents revealed: Deeper than any seen before, and teeming with new creatures

Scientists have revealed details of the world's most extreme deep-sea volcanic vents, five kilometers down in a rift in the Caribbean seafloor. The undersea hot springs, which lie 0.8 kilometers deeper than any seen before, may be hotter than 450 °C and are shooting a jet of mineral-laden water more than a kilometer into the ocean above.

Bycatch-22: Protecting Butterfish

Scientists work to assist fishermen in ways to avoid accidentally hauling in butterfish, a species protected by fishing limits. The researchers develop models to predict where the fish will be.

Paddlefish sensors tuned to detect signals from zooplankton prey

Neurons fire in a synchronized bursting pattern in response to robust signals indicating nearby food.

Harp seals on thin ice after 32 years of warming

Warming in the North Atlantic over the last 32 years has significantly reduced winter sea ice cover in harp seal breeding grounds, resulting in sharply higher death rates among seal pups in recent years, according to a new study.

Fish mimics octopus that mimics fish

Nature's game of intimidation and imitation comes full circle in the waters of Indonesia, where scientists have recorded for the first time an association between the black-marble jawfish and the mimic octopus.

Salt water alone unlikely to halt Burmese python invasion

Invasive Burmese python hatchlings from the Florida Everglades can withstand exposure to salt water long enough to potentially expand their range through ocean and estuarine environments.

'Lost world' discovered around Antarctic vents

Communities of species previously unknown to science have been discovered on the seafloor near Antarctica, clustered in the hot, dark environment surrounding hydrothermal vents. The discoveries include new species of yeti crab, starfish, barnacles, sea anemones, and potentially an octopus.

Molecular mechanism links temperature with sex determination in some fish species

Researchers have found the epigenetic mechanism that links temperature and gonadal sex in fish. High temperature increases DNA methylation of the gonadal aromatase promoter in females.

Sunlight and bunker oil a fatal combination for Pacific herring

The 2007 Cosco Busan disaster, which spilled 54,000 gallons of oil into the San Francisco Bay, had an unexpectedly lethal impact on embryonic fish, devastating a commercially and ecologically important species for nearly two years, reports a new study.

Sea cucumbers: Dissolving coral reefs?

Coral reefs are extremely diverse ecosystems that support enormous biodiversity. But they are at risk. Carbon dioxide emissions are acidifying the ocean, threatening reefs and other marine organisms. New research analyzed the role of sea cucumbers in portions of the Great Barrier Reef and determined that their dietary process of dissolving calcium carbonate (CaCO3) from the surrounding reef accounts for about half of at the total nighttime dissolution for the reef.

Ocean acidification: Some organisms already experiencing ocean acidification levels not predicted to be reached until 2100

Ocean acidification research is a relatively new study topic as scientists have only appreciated the potential extent of acidification within the last decade. As greenhouse gas emissions have accelerated in the past century, the oceans have taken up about a third of the carbon dioxide produced by human activities. That excess beyond natural levels increases amounts of carbonic acid in seawater. New research shows that some organisms are already experiencing ocean acidification levels not predicted to be reached until 2100.

Belize protected area boosting predatory fish populations

A 14-year study in an atoll reef lagoon in Glover's Reef, Belize has found that fishing closures there produce encouraging increases in populations of predatory fish species. However, such closures have resulted in only minimal increases in herbivorous fish, which feed on the algae that smother corals and inhibit reef recovery.