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Tag: "fish" at biology news

Does missing gene point to nocturnal existence for early mammals?

...d. They say that whereas some animals like birds, fish and amphibians have two versions of this photoreceptor, mammals, including humans, only have one. The findings ?published in the Public Library of Science journal PLoS Biology ?reveal how our experience of the light environment may be impoverished...

Detecting microalgae in coastal waters

...ense populations, lead to low oxygen "dead zones," fish kills, and-depending on the species-human health risks. To protect their communities, coastal managers must monitor and characterize algal populations that change quickly over space and time. In vogue are fluorescence-based optical monitors that 'see...

A fisheye view of the deadliest breast cancer

...ikely yet extremely promising ally: a transparent fish suitable for xenografts. More properly, it’s a t...t like us. Being immune suppressed, the transgenic fish allowed Konstantin Stoletov and colleagues at UCSD to insert a xenograft of human MDA breast cancer...

Extreme environment changes fish appearance

...protected from extinction. In 1976, the inch-long fish was at the center of a legal battle that reached t...upreme Court. Conservationists had established the fish in refuges elsewhere in case Devil's Hole became too dry. But the refuge-bred fish began to look dif...

Tiny bones rewrite textbooks

... produced many other species of animals, including fish and birds - also promises to shed new light on climate change in the Australasian region, recording a massive shift from a warm, wet phase to a much cooler and drier period. "This promises to be a richly rewarding fossil field and the heraldic disc...

Special chip provides better picture of salmon health

How do you tell if a fish is fit and well? This is a question which has trou...s. Atlantic salmon are the most important farmed fish in the UK and a disappearing species in the wild. They are particularly vulnerable to infection beca...

Fish species plays surprise role in aiding coral reef recovery

...ameras. 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 species previously thought to be an invertebrate feeder. Meanwhile, parrotfish...

Climate change has surprising effect on endangered naked carp

...king study reveals an unanticipated way freshwater fish may respond to water diversion and climate change.... at only 30 percent of its capacity in lake-water fish compared to river-water fish. Ammonia-N secretion by the kidneys declines by a surprising 70 perce...

Coral reefs are increasingly vulnerable to angry oceans

...ther problem is overfishing, which can deplete the fish that eat dead coral and keep the reef clear for the next generation of corals. "Regardless of whether we think of more severe storms as a looming threat or just the ramping up of a natural cycle, one thing is certain," said Connolly. "To predict...

Batfish to the rescue!

...was being choked to death by seaweed ?although the fish was never previously known as a weed-eater. Sc...ver-fishing of weed-eaters like parrot and surgeon fish ?which normally keep the coral clean of weedy growth." Prof. Bellwood and colleagues Prof. Terry ...

Fatty fish protects against cancer

...n shows that eating salmon or other kinds of fatty fish a few times a month would be one good way to go ab...Institutet have concluded that women who eat fatty fish gain significant protection against renal cancer. At least one portion of fatty fish a week during ...

West Australian fossil find rewrites land mammal evolution

A fossil fish discovered in the West Australian Kimberley has be...iscovery by studying a 380 million-year-old fossil fish called Gogonasus, or Gogo fish, named after Gogo Station in Western Australia where it was found. ...

Commercial fishing causes dangerous fluctuations in fish populations

Commercial fishing causes serious fluctuations in fish populations leaving them in danger of total collap...tuations mean current measures in place to control fish stocks may not be sufficient to ensure their sustainability. The research, which is published in t...

Serengeti patrols cut poaching of buffalo, elephants, rhinos

... used since the 1930s to estimate the abundance of fish has shown for the first time that enforcement patr...technique used for decades by managers to estimate fish abundance and set fishing limits. Estimates are based on a ratio comparing the number of fish caught...

'Killer' B cells demonstrate evolutionary link between fish and mammal immune systems

...ue evolutionary link between the immune systems of fish and mammals in the form of a primitive version of ... potential new strategy for developing much-needed fish vaccines. "When examining fish B cells we see them actively attacking and eating foreign bodies, wh...

Renewed dolphin slaughter prompts new campaign

...mpete with local fishermen for limited supplies of fish and that the drives are in fact a means of pest control. Also, the "Act for Dolphins" consortium maintains that, in spite of the fact that the hunting of dolphins and use of their meat has waned in popularity, the government is actually encouraging t...

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

...o 100 percent accuracy. Two moles were tested with fish scent trails and followed them with 85 percent and 100 percent accuracy. When the grid was replaced with a screen with openings too small for the air bubbles to pass through, however, the moles' performance dropped down to the level of chance ?the ...

Squid skin reveals hidden messages

... signals to one other while staying camouflaged to fish or mammalian predators, most of which do not have polarization vision. Mäthger notes that these messages could contain information regarding the whereabouts of other squid, for example. "Whether signals could also contain information regarding the ...

A giant among minnows: Giant danio can keep growing

Two fish that share much in common genetically appear to ha...such disparate areas as muscle wasting disease and fish farming, a new study shows. The study in the November issue of the American Journal of Physiology-R...

Ocean temperature predicts spread of marine species

...'Connor said. "It is important to understand how a fish population is replenished if we want to attempt to manage or conserve it." Using data from 72 marine species, including cod, herring, American lobster, horseshoe crabs and clams, O'Connor and her colleagues developed a model that predicts how far ...

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