fish in Biological News

Urban water ecology at the ESA annual meeting

... Lakeshore development reduces food supplies for fish Freshwater fish, especially stream fish, rely ... But little is known about their importance to fish in lakes, where the size and shape of a lake can determine how much its fish rely on shoreline food sources. Tessa Francis, a ...

New hope for fisheries

... study had two goals: to examine current trends in fish abundance and exploitation rates (the proportion of fish taken out of the sea) and to identify which tools ... have applied in their efforts to rebuild depleted fish stocks. The work is a significant leap forward ...

Drug-proof zebrafish reveal secrets of addiction

... response was determined by measuring whether fish chose to move to a half of the tank where the ... By comparing these drug-proof nad mutants to fish with a normal response, Webb and her colleagues ... are expressed in neurogenic domains of the adult fish brain these are domains where neurons are ...

August 2009 Geology and GSA Today media highlights

... and terrestrial P-T boundary; a major Silurian fish die-off; and mapping naturally occurring asbestos ... Silurian Period (about 443-416 million years ago) fish faunas were struck hard by extinctions caused by ... vertebrates, wiping out almost two-thirds of the fish species and causing major ecological ...

Global curbs on overfishing are beginning to work

... study had two goals: to examine current trends in fish abundance and exploitation rates (the proportion of fish taken out of the sea) and to identify which tools ... have applied in their efforts to rebuild depleted fish stocks. The work is a significant leap forward ...

Naming evolution's winners and losers

... Mammals and many species of birds and fish are among evolution's "winners," while ... group that includes most mammals; and a group of fish that includes most of the fish that live on coral reefs, said Alfaro, an ...

Freshwater fish at the top of the food chain evolve more slowly

... the largemouth bass is a favorite freshwater fish with an appetite for minnows. A new study finds ... on fish." In terms of nutritional value, fish are loaded with fats and proteins needed for growth, explain the researchers. "Fish make great fish food," says co-author Brian O'Meara of the ...

Biologists rediscover endangered frog population

... successful efforts by California Department of fish and Game to restore frog habitat renews hope of ... Department of Transportation (Caltrans), U.S. fish and Wildlife Service, U.S. Forest Service, University of California and California Department of fish and Game. The San Diego Zoo's Institute for ...

Technology improves salmon passage at hydropower dams

... Telemetry System (JSATS). The JSATS-tagged fish were released from the Lower Granite Dam on the ... a.m., Wednesday, July 29, Session 2G: Solving fish Passage Challenges. Juvenile Salmon Acoustic ... . Hydro model helps fish avoid becoming dinner Migrating salmon will ...

Overfishing and evolution

... and SCUBA divers is not the best way to monitor fish populations, if we want to know the evolutionary effects of overfishing. The fish population in coral reef areas is often assessed ... study from the University of Victoria shows that fish avoid the divers and snorkelers who try to count ...

Fish on the menu of our ancestors

... has shown that this individual was a regular fish consumer ( PNAS , 07.07.2009). Freshwater fish are a major part of the diet of many peoples around the world, but it has been unclear when fish became a significant part of the year-round diet ...

First direct evidence of substantial fish consumption by early modern humans in China

... Freshwater fish are an important part of the diet of many peoples around the world, but it has been unclear when fish became an important part of the year-round diet ... and sulfur in particular, can show whether such fish consumption was an occasional treat or a regular ...

The sound of light: Innovative technology shatters the barriers of modern light microscopy

... genetic expression within live fly larvae and fish by "listening to light". In the future this ... his team made light audible. They illuminated the fish from multiple angles using flashes of laser light ... of a millimeter). And best of all, the sedated fish wakes up and recovers without harm following the ...

Two is not company -- as far as fish are concerned

... It might be assumed that aquarium fish don't mind who or what they encounter in their ... are striving to improve conditions for keeping fish in home aquaria. In line with the aim to ... densities and the use of novel objects with fish commonly kept in home aquaria. This current ...

The faster they come

... measured, the researchers found that subordinate fish were significantly faster than the dominant ones. ... because we predicted the opposite: that dominant fish were the ones that would prove to be more ... may be a training effect because subordinate fish have to escape quickly and often, or that ...

High carbon dioxide levels cause abnormally large fish ear bones

... journal Science describes experiments in which fish that were exposed to high levels of carbon ... or ear bones. Otoliths serve a vital function in fish by helping them sense orientation and ... finding "significantly larger" otoliths in fish developing in high-CO2 water. ...

Evolution of a contraceptive for sea lamprey

... to a contraceptive for female lampreys a jawless fish considered an invasive pest species in the Great ... the appearance of sharks. In contrast to sharks, fish and land vertebrates, lampreys have no jaw. They feed on fish by attaching themselves to ...

Troubled waters: Low Apalachicola River flow may hurt gulf fisheries

... could prove detrimental to grouper and other reef fish populations in the northeastern Gulf of Mexico, ... alter the availability of food for the very young fish larvae, according to research scientist Steven ... coincide with the spawning period of several reef fish species. "It is possible that if the natural ...

Discovery of a water snake that startles fish in a way that makes them flee into its jaws

... has found a way to startle its prey so that the fish turn toward the snake's head to flee instead of ... Then it remains completely motionless until a fish swims into the area near the hook of the "J." ... in a few thousandths of a second. In fact, fish are famous for the rapidity of their escape ...

Gear bans 'can help save reefs'

... gear could help the world's coral reefs and their fish populations survive the onslaughts of climate ... that bans on fishing gear - like spear guns, fish traps, beach seine nets, and gill nets could aid in the recovery of reefs and fish populations hard hit by coral bleaching events. ...

Common fish species has 'human' ability to learn

... Although worlds apart, the way fish learn could be closer to humans' way of thinking ... a new research study. A common species of fish which is found across Europe including the UK, ... universities. The researchers suggest these fish might have an unusually sophisticated social ...

Help for climate-stressed corals

... gear could help the world's coral reefs and their fish populations survive the onslaughts of climate ... that bans on fishing gear - like spear guns, fish traps, and beach seine nets could aid in the recovery of reefs and fish populations hard hit by coral bleaching events. ...

Study shows transfer of heavy metals from water to fish in Huelva estuary

... although the most "available" elements for the fish were zinc, cadmium and copper. "Numerous ... on three types of samples water, sediments and fish tissue. By using a statistical index (Pearson ... as well as the "hystopathological" damage to fish caused by this contamination. The central ...

Hatchery fish may hurt efforts to sustain wild salmon runs

... reproduce of the wild-born offspring of hatchery fish means that adding hatchery fish to wild populations may ultimately be hurting ... runs, scientists said. The study found that a fish born in the wild as the offspring of two ...

Canadian-based UN coral reef expert honored at world meeting in Australia

... Indo-Pacific ichthyology at the 8th Indo-Pacific fish Conference (IPFC, www.ipfc2009asfb.com ) in ... for major contributions to world knowledge of fish communities, particularly those in coral reefs. His work on reef fish ecology and behavior began in Hawaii in 1964 and ...

Lenfest forage fish task force launched

... Brook University has launched the Lenfest Forage fish Task Force, a team of 13 preeminent scientists ... to tackle the unprecedented depletion of forage fish from our oceans. These small prey fish are a critical food source for marine mammals, ...

Did the North Atlantic fisheries collapse due to fisheries-induced evolution?

... and deep-water adapted cod. The shallow-water fish have only 8% of the fitness of deep-water fish. ... can lead to rapid elimination of shallow-water fish in only a few generations with drastic effects on ... intense selection results from the interaction of fish that select their habitat by genotype and ...

Why the thumb of the right hand is on the left hand side

... signaling pathway functions in the fly, mouse, fish and in humans similarly", says Pia Aanstad. In ... to observe the development of the small tropic fish in fast motion. "We want to better understand how ... U.S., Pia Aanstad discovered a mutated zebra fish whose Hedgehog signaling pathway was disrupted. ...

Voyages of discovery or necessity?

... known that this population was heavily reliant on fish as a source of protein, and the scientists suggest that once their fish resources became inedible, voyaging became a ... by an ocean teeming with fish, don't eat fish as a regular part of their diet but instead eat ...

Fish may actually feel pain and react to it much like humans

... WEST LAFAYETTE, Ind. - fish don't make noises or contort their faces to show ... feel pain," Garner said. "We wanted to see if fish responded to potentially painful stimuli in a ... damage to a fish's tissue. Half of the fish were injected with morphine, and the others ...

Unifying the animate and the inanimate designs of nature

... different forms of locomotion -- the swimming of fish and the running or flying of animals. The commonly held belief among biologists was that fish locomotion was different than other animal ... they live in water, the conventional wisdom held, fish were different because they would not be subject ...

Laughing hyenas, wailing levees, the sound of cheese and blaring bagpipes

... 23, 2009 -- Deteriorating screws in bridges, fish that listen in the dark, medical devices that use ... Wimps Hear Dangerous Noises Differently fish that Live in the Dark Have Better Hearing ... 2) fish THAT LIVE IN THE DARK HAVE THE BEST EARS ...

Eating fatty fish once a week reduces men's risk of heart failure

... BOSTON Eating salmon or other fatty fish just once a week helped reduce men's risk of ... "Previous research has demonstrated that fatty fish and omega-3 fatty acids help to combat risk ... their numbers showed that the men who ate fatty fish (herring, mackerel, salmon, whitefish and char) ...

Virginia Tech graduate student receives first Rachel Carson award for scientific excellence

... Award for Scientific Excellence from the U.S. fish and Wildlife Service. Mair is a biologist at the agency's White Sulphur Springs National fish Hatchery. The award recognizes service ... application to achieve extraordinary results in fish and wildlife conservation. Mair was recognized ...

Fish oils reduce greenhouse gas emissions from flatulent cows

... The benefits to animals of omega 3 fatty acids in fish oils have been well documented helping the heart ... College Dublin reported that by including 2% fish oil in the diet of cattle they achieved a ... Lillis, one of the researchers, said, "The fish oil affects the methane-producing bacteria in the ...

Targeted drug therapy prevents exercise-induced arrhythmias

... if the arrhythmias can be controlled medically," fish said. "That's an exciting prospect." fish feels like he's come full circle with flecainide. ... attack survivors who had ventricular arrhythmias. fish and his colleagues found an unexpectedly high ...

Team IDs genesis of mass migrations

... of marine ecosystems that vast oceanic fish shoals inhabit," the team writes in the March 27 ... For example, the team found that once a group of fish reaches a critical population density, it ... engineering. The resulting shoals of migrating fish can extend some 40 kilometers or approximately 25 ...

Study assesses impact of fish stocking on aquatic insects

... The impact fish stocking has on aquatic insects in mountain lakes ... now in use in California mountain lakes where fish do not naturally occur. The research has value ... Since 2000, the California Department of fish and Game has reduced the number of wilderness ...

You don't call, you don't write: Connectivity in marine fish populations

... documents how larval dispersal connects marine fish populations in a network of marine protected ... New Britain, Papua New Guinea. This coral reef fish is the same species as Disney's famed Nemo, but ... question of just how far and wide these larval fish travel, or disperse, has been the subject of much ...

Researchers develop flow sensors based on hair structures of blind cavefish

... A blind fish that has evolved a unique technique for sensing ... active sonar. Although members of the fish species Astyanax fasciatus cannot see, they ... blind cavefish in the laboratory. While the fish use these hairs to detect obstacles, avoid ...