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Tag: "ocean" at biology news

Underwater listening devices yield discoveries about endangered large whales

...ones that are held at different distances from the ocean floor and are equipped with disk drives able to store tens of gigabytes of data. This allows them to operate for months at a time before they are recovered and the data accessed. Acoustic surveys using the devices have been conducted in the Gulf of A...

Research tracks whales by listening to sounds

...autonomous hydrophones that can be deployed in the ocean to record the unique clicks, pulses and calls of d...nnections between the appearance of the whales and ocean conditions. "We'll look at water temperature, salinity and even chlorophyll growth," Mellinger said....

One fish, two fish: New MIT sensor improves fish counts

...at MIT have found a new way of looking beneath the ocean surface that could help definitively determine whe...ir device could locate ancient riverbeds under the ocean floor. But when their reconnaissance images did not match the riverbeds, the researchers went back w...

Parachuting allows krill to eat and run

... on Earth, parachute into the deeper layers of the ocean many times a night and sequester large amounts car...al migration (DVM), in which they occupy the upper ocean layers at night to eat and the deeper layers by day to hide. Previous research has shown that this b...

The diversity of marine life in the Gulf of Maine region is much greater than previously thought

...isheries laws in the U.S. and Canada and of recent ocean commissions. "Though the Gulf of Maine is one of ... they are collectively major players in the web of ocean life." The Census of Marine Life is a global network of researchers in more than 70 nations engaged...

Some like it hot: Worms at deep-sea vents favor a fiery 45-55°C

...er of the Alvinellidae family of worms dwelling at ocean depths of some 2,200 meters off the Pacific coast of Washington. When the researchers placed them within a special high-pressure seawater aquarium with a sharp temperature gradient, these worms chose to remain at roughly 50 degrees Celsius for the du...

Carbon cycle was already disrupted millions of years ago

...-scale release of carbon from stocks stored in the ocean floor or peats and bogs. The atmospheric carbon ...eleased from gas hydrates which were buried in the ocean floor. It is not clear which mechanism was responsible for this. Methane could also have been formed...

Study finds evolution doesn't always favor bigger animals

...s Poseidonamicus -- increased only when the global ocean temperature cooled. When temperatures remained sta...tracodes," said Hunt. Hunt and Roy found that as ocean temperatures declined by some 10 degrees centigrade, from 40 million years ago to the present day, t...

Expedition discovers marine treasures

...encountered new species of fish, seaweed and other ocean life at little-studied Saba Bank Atoll, a coral-crowned seamount 250 kilometers southeast of Puerto Rico in the Dutch Windward Islands. In a series of dives buffeted by high winds and strong currents, scientists from Conservation International (CI),...

Hooked on fishing, and we're heading for the bottom, says scientist

...h bountiful fish. Says Dr. Pauly: "Reclaiming the ocean and its resources from excessive use will be a key task for humanity in the 21st century." ...

MIT: Oceans are a major gene swap-meet for plankton

...EE graduate student, suggest that gene-swapping in ocean microbes resembles the flow of genes already known to occur among disease-causing bacteria. In an ocean context, this exchange mechanism would offer marine microbes a diverse palette of potential gene com...

High-tech tags on marine animals yield valuable data for biologists and oceanographers

...ng seals, sea lions, tunas, and sharks to serve as ocean sensors, outfitting these top predators with elect...in which they live. "We're using these animals as ocean sensors to tell us about oceanographic conditions, and we're also learning how they use the ocean--w...

Ocean virus identified in human blood samples

A virus of ocean origin that can cause a range of diseases in several animal species has been found in human blood samples. The virus, or antibodies to it, was found most often in the blood of individuals with liver damage, or hepatitis of unknown cause related to bl...

Marine mammals are on the frontline of failing ocean health

...at Land-based pollutants are so prevalent in the ocean that scientists are using them to trace the diets ...erstand how pollutants are transferred through the ocean food web to consumers, both humans and animals," says Peggy Krahn of the NOAA. "Until we understand...

Scientists discover interplay between genes and viruses in tiny ocean plankton

...from the U.S. Department of Energy. "Our image of ocean microbes and their role in planetary maintenance i...t in seawater. Some of them are adept at infecting ocean microbes like Prochlorococcus, the sea's most abundant plankton species. The ocean viruses, which ca...

2005 was the warmest year in a century

... Alaska, Siberia and the Antarctic Peninsula. Most ocean areas have warmed. Because these areas are remote and far away from major cities, it is clear to climatologists that the warming is not due to the influence of pollution from urban areas. ...

Pacific Islands paradise protected

...eople of Kiribati can always benefit from the rich ocean life of their home. "If the coral and reefs are protected, then the fish will thrive and grow and bring us benefit," President Tong said. "In this way all species of fish can be protected so none become depleted or extinct." The Republic of Kiribati...

Vaccine provides 100 percent protection against avian flu virus in animal study

...nergy in the sea," said DeLong. Microbes near the ocean surface, for example, had more genes devoted to ta...Station ALOHA is a well-studied region of the open ocean with regard to plankton ecology, biogeochemistry and physical oceanography, making it an ideal colle...

Wyoming cloud seeding experiment begins this month

...nergy in the sea," said DeLong. Microbes near the ocean surface, for example, had more genes devoted to ta...Station ALOHA is a well-studied region of the open ocean with regard to plankton ecology, biogeochemistry and physical oceanography, making it an ideal colle...

Ocean 'dead zones' trigger sex changes in fish, posing extinction threat

...kton blooms. As these blooms die, they sink to the ocean floor where they are decomposed by bacteria and other microorganisms. Decomposition depletes most of the oxygen in the surrounding water, making it difficult for marine life to survive. Although some hypoxic areas ?dead zones ?develop naturally, sc...

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