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Tag: "underwater" at biology news

Pacific Islands paradise protected

...rea in the region with deep-sea habitat, including underwater mountains. Located near the equator in the Central Pacific between Hawaii and Fiji, the Phoenix Islands form an archipelago several hundred miles long. They are part of the Republic of Kiribati, which comprises three distinct island groups (Gilbert ...

Duck-billed dino crests not linked to sense of smell

...d as everything from brain coolers to snorkels for underwater feeding. Now, David Evans, a PhD student in zoology at the University of Toronto at Mississauga, has been able to use a reconstructed brain cavity to rule out one historically popular theory: that the crests evolved to increase the animal's sense of ...

Warbling whales speak a language all their own

... engineer who specializes in signal processing and underwater acoustics at the University of Massachusetts Dartm...te in a complex way," said Suzuki. "Given that the underwater environment is very different from our world, it is not surprising that they would communicate in ra...

Expedition discovers marine treasures

An underwater mountain that forms the world's third-largest atoll has some of the richest diversity of marine life ever found in the Caribbean, according to scientists who recently explored the area. The two-week expedition in January encountered new species of f...

'Dead zone' summer killed billions of ocean state mussels

...he bay's surface, Brown University ecologists went underwater and discovered a massive mussel die-off. In a survey of nine mussel reefs located in the central bay, researchers found one reef completely wiped out. Of the remaining eight, seven were severely depleted. The ecologists estimate that the number of m...

Restoring seagrass beds: Is it for the birds?

... constant boat traffic in its shallow waters. Its underwater shoal grassbeds, however, have been much impacted by propeller damage; and much of the terrestrial vegetation on the island itself was destroyed by Hurricane Ivan in 2004. Drs. Heck and Dindo received a grant from the Gulf of Mexico Program to resto...

Underwater listening devices yield discoveries about endangered large whales

...logical mystery, but listening for the distinctive underwater sounds provides a valuable way to track the movements of endangered large whales. Autonomous data-recording devices equipped with hydrophones (underwater microphones), deployed in remote waters off Alaska, have been used in recent years to track sea...

Study shows hope for ridding lakes of clawed invader

... thousands of lakes and streams, clear cutting the underwater forests that are critical fish habitat, evicting the native crayfish from one body of water after another and scooping up fish eggs like so much caviar. But the clawed invader, the early results of a long-term University of Wisconsin-Madison study ...

Marine 'dead zone' off Oregon is spreading

...ending data in near real-time. In addition, a new underwater unmanned vehicle equipped with sensors to measure temperature, salinity, chlorophyll and dissolved oxygen is routinely sampling across central Oregon waters. During normal years, cold water rich in nutrients but low in oxygen upwells from the deep o...

Healthy coral reefs of Madagascar resisting damage from climate change

...ld R. Allen, a leading ichthyologist who conducted underwater fish surveys on the expedition. Jean Maharavo of Madagascar's National Center for Environmental Research, who took part in both expeditions, noted that much of the island nation's marine biodiversity has yet to be studied. "During each of these two...

Drug discovery team to explore newly discovered deep-sea reefs

... habitats off Miami and Bimini using an autonomous underwater vehicle (AUV) equipped with advanced sonar technology. AUVs operate without a tether to the surface and are pre-programmed to independently perform tasks. AUVs have been frequently used in oil exploration and also in a variety of other research progr...

Deep-water discovery

... using advanced sonar technology and an autonomous underwater vehicle (AUV). AUVs operate without a tether to the surface and are pre-programmed to independently perform tasks. These researchers believe this is the first time an AUV has been used for mapping deepwater coral reefs. AUVs have been frequently u...

Dolphins at risk

...lenose dolphins may have been hurt by pollution or underwater noise. Author, Dr. Jonathan David, MCIWEM, suggests that mitigation measures be put in place to help prevent any adverse impacts upon dolphin populations. Operations should be restricted to low tide and suspended during calving season, an exclusion...

South Pacific plant may be missing link in evolution of flowering plants

...lenose dolphins may have been hurt by pollution or underwater noise. Author, Dr. Jonathan David, MCIWEM, suggests that mitigation measures be put in place to help prevent any adverse impacts upon dolphin populations. Operations should be restricted to low tide and suspended during calving season, an exclusion...

Exxon Valdez oil found in tidal feeding grounds of ducks, sea otters

...wildlife for decades." The Exxon Valdez stuck an underwater rock formation on March 24, 1989, spilling 11 million gallons of heavy crude oil into the Sound over the next several days. Despite massive clean-up efforts, Short estimates about six miles of shoreline is still affected by the spill and as much as 1...

Corals switch skeleton material as seawater changes

...netary Sciences at Johns Hopkins. Reefs are large underwater structures of coral skeletons, made from calcium carbonate secreted by generation after generation of tiny coral polyps over sometimes millions of years of coral growth in the same location. The team showed that corals can switch from using aragonite...

Contrary to common wisdom, scientist discovers some mammals can smell objects under water

... the moles are getting whiffs of interesting odors underwater doesn't necessarily mean they smell them. So Cata... edible objects by sniffing alone, Catania created underwater scent trails leading to food and recorded how well the moles' could follow them. To keep the moles f...

Batfish to the rescue!

...ormal state. The ensuing action was captured on underwater TV cameras. When the cage was removed from a particularly weedy patch, local herbivores pecked at it but made little impression on the dense growth of sargassum weed. "Then these batfish showed up and got stuck into it. In five days they had halv...

Fish species plays surprise role in aiding coral reef recovery

.... They then filmed the reef’s recovery with remote underwater digital videos cameras. Remarkably, only two of the 27 herbivorous fish species present on the reefs had any significant impact on its recovery from algal overgrowth. What was most surprising was that the dominant browser was a rare batfish, a specie...

Squid-inspired design could mean better handling of underwater vehicles

...make it easier for scientists to maneuver and dock underwater vehicles at low speeds and with greater precision....king mechanisms are essential for the operation of underwater vehicles, especially in harsh environments," Mohseni said. "We set out to resolve the trade off tha...

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