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Tag: "sea" at biology news

Sperm trading can resolve hermaphrodite mating conflicts

...ctly manipulating mating performance in a tropical sea slug, Chelidonura hirundinina, researchers of the ...nnika Putz, and Nico Michiels generated individual sea slug hermaphrodites only capable of performing a "dry" copulation--that is, without sperm transfer. ...

Viagra's hidden help for wildlife

...treat impotence with TCMs. Animals such as seals, sea horses and tigers have long been hunted because practitioners of TCM use their body parts for their presumed healing and virility qualities. The researchers surveyed 256 Chinese men, aged 50 to 76, who sought treatment at a large TCM clinic in Hong ...

Missing fossil link 'Dallasaurus' found

... of the age of dinosaurs, one group moved into the sea and rose to the very top of the food chain," expla...od was a time of hot house temperatures and rising sea levels. "As the earth warmed and the seas rose, small land-dwelling lizards took to the oceans and ...

Health of coral reefs detected from orbit

...d coastal protection. Coral bleaching is linked to sea temperatures above normal summer maxima and to sol...er concludes. "However satellite sensors measuring sea surface temperature such as Envisat's Advanced Along Track Scanning Radiometer (AATSR) can be applie...

Leading lampreys to slaughter: Pheromone for scourge of Great Lakes identified

... it was the Pied Piper's tune. For the destructive sea lamprey of the Great Lakes, it's a chemical attrac...so it could be synthesized and used to control the sea lamprey, which laid waste to Great Lakes fisheries of lake trout and other species in the mid-20th c...

Jefferson scientists identify gene defect leading to abnormal skin development and cancer

... it was the Pied Piper's tune. For the destructive sea lamprey of the Great Lakes, it's a chemical attrac...so it could be synthesized and used to control the sea lamprey, which laid waste to Great Lakes fisheries of lake trout and other species in the mid-20th c...

Sahara's edge studied from ground, air and space to improve water management

...ndwater is undergoing salinization due to invading sea water. Gabes further north includes several oases and ground water at various levels, but its deep-level fossil water has been exhausted in many places. A Dornier Do-228 aircraft flown by the German Aerospace Center (DLR) was the platform for two ai...

Fossil find: 'Godzilla' crocodile had head of a dinosaur, fins like a fish

...Researchers have discovered evidence of an ancient sea creature that would have made Tyrannosaurus rex, t...rated edges. It was definitely a predator of large sea creatures.?/p> Paleontologists Zulma Gasparini and Luis Spalletti of the National University of ...

Sea slug mixes chemical defense before firing at predators

When threatened by predators, sea slugs defend themselves by ejecting a potent inky ...hD, examined the ink and opaline glands of Aplysia sea slugs for the chemicals L-lysine, L-arginine and an enzyme protein called escapin. In previous resea...

Seal rookeries could provide a reliable food source for endangered California condors, study finds

...dors raised in captivity be released near seal and sea lion rookeries so that the birds can once again fe...ategy to train them to start eating dead seals and sea lions, whose populations are coming back along the California coast." Captive breeding Standing ...

UCR environmental scientists propose chemical solution to cleaning California's Salton Sea

...ean the Salton Sea, evaporation will result in the sea being too salty for fish, resulting also in the lo...nal Park," Amrhein said. "If nothing is done, this sea will shrink, exposing lake sediments that could generate dust and worsen air quality. Fish and fish-...

Why the Amazon rainforest is so rich in species

...s trapped water near the poles, leading to reduced sea levels and supposedly to periods of profound drought in the tropics generally, and in the Amazon basin particularly. Forty years ago, evolutionary biologists proposed that such periods of drought led to rainforest refuges in which many new species of...

Tropical Atlantic cooling and African deforestation correlate to drought, report scientists

...ross central Africa on the monsoon belt. The three sea surface cooling periods found by the scientists co...e climate system that results from the coupling of sea surface temperature and vegetation cover on land. "We can't predict how, but it is clear that this...

Embryos tell story of Earth's earliest animals

... not likely to affect fossilization. They used two sea urchin species as models, Heliocidaris erythrogram...m of the ocean, especially in the vicinity of deep sea vents. Because hydrogen sulfide is extremely toxic (and flammable), the scientists used beta-mercapt...

Patterns in genome organization may partially explain how microbial cells work

...velet analysis identified significant increases in sea surface temperatures; it also revealed nonrandom p...f statistically significant patterns floating in a sea of insignificant patterns," said Palsson, author of Systems Biology: Properties of Reconstructed Net...

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

...ones," that lack sufficient oxygen to sustain most sea life. Fish and other creatures trapped in these zo...s, and they are spreading over larger areas of the sea floor, Wu says. The United Nations Environmental Programme estimates nearly 150 permanent and recurr...

Researchers map of genetic variations implicated in disease

...arger population of 140 DNA samples. "Within the sea of over 20,000 sequence variations across the 4 million MHC bases, we found one island of stability," continued Dr Beck. "A region of 160,000 bases that is up to 200-fold less variant between chromosomes sharing part of the same HLA type, suggesting ...

Pacific Islands paradise protected

...ll as healthy fish populations and the presence of sea turtles and other species, demonstrated the pristine nature of the area and its importance as a migration route. "It's a remarkable atoll marine wilderness area, the most magnificent I have ever seen. The Phoenix Islands have experienced little huma...

2005 was the warmest year in a century

...eather stations on land, satellite measurements of sea surface temperature since 1982, and data from ships for earlier years. Previously, the warmest year of the century was 1998, when a strong El Nino, a warm water event in the eastern Pacific Ocean, added warmth to global temperatures. However, what'...

Marine mammals are on the frontline of failing ocean health

... to be infected with Toxoplasma, and the fact that sea otters spend their entire lives grooming, sleeping...ls attention to the flow of pathogens from land to sea that might otherwise go unnoticed. Conrad recommends that cat owners keep their animals inside an...

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