Tag: "spawning" at biology news
A New Biochemical Link Established Between Stress, Sex And Dominance
...itate the rocky nooks that male cichlids defend as spawning
sites in their territories. By setting up various versions of this environment and introducing various combinations of male and female fish, Fernald has been able to study social behavior and the physiological and neurological changes that it entails...
Handfish Steps Back From Brink Of Extinction
...me, been able to produce the right conditions for spawning
and rearing of juvenile fish in tanks. Before the research began two-years ago, very little was known about the handfish or even if any remained. The research involved surveys to locate remnants of the former population in the Derwent Estuary,...
Biggest Acoustics Meeting Ever
....edu ) will describe how sound is used to map fish spawning
activities off the coastof North Carolina (4pAO6). Such studies should help governments to develop more sophisticated fishmanagement plans than previously possible. The Acoustics of Opera Houses Designing an opera house with good acoustics requir...
Harbor Branch Oceanographic Institution's Aquaculture Division Studies Viability Of Controlled Reproduction Of Southern Flounder In Captivity
...rine waters throughout the year, but undergoannual spawning
migrations to offshore waters in late fall to earl...rounds in the Indian RiverLagoon to their offshore spawning
grounds. The broodstock were photothermallyacclimated in circular tanks in a maturation room at Har...
Sturgeon, Trout And Telemetry--USGS Research Mixes Science And Technology At American Fisheries Society Annual Meeting
...assing through hydroelectric turbines during their spawning
migration to the ocean. Over a two-year period, researchers using radio and acoustic telemetry devices monitored the migration and behavior of the eels near a hydroelectric dam. Most eels moved through the dam area at night at a variety of depths, ...
When Genes "Breed" In The Lab, A Suprising Number Of Their Offspring Are Supergenes
SEX at a molecular level is spawning
an elite class of proteins. Maxygen, acompany in Santa Clara, California, has used a DNA shuffling technique to createinterferons that are dramatically more effective against viruses than anyproduced naturally by the immune system. It has also made u...
Estuaries Vital To The Productivity Of Southeastern U.S. Fisheries
...stream water. Research suggests that after spawning
out on the continental shelf inthe winter, many Southeastern species then migrate shoreward into estuaries thefollowing spring. They then spend the first vital year or two of their livesthere, in the bays, tidal creeks and river mouths that pocket th...
Scientists Study Protein's Role In Tumor Development In Fish
...which appear in the fall and die during the spring spawning
season --seem to pose no health risk to humans, ac... spread the virus that causes thetumors during the spawning
season, when all the fish are grouped together. "It'sjust like sending your child to daycare," Holzs...
Improving Salmon Management
... year the number of spawners they want toreach the spawning
grounds for each stock," says Peterman. "The variation alsoaffects managers' ability to achieve that target by creating uncertainty aboutthe abundance of fish present during a fishing season." He says the researchers will also use the grant ...
Invasive fishes pose increasing threat to U.S. waters and native fishes, says USGS
...n native species, or competewith them for food and spawning
sites. Another danger invasive species pose is the loss of biological diversity throughcross-breeding, or hybridization, between exotic and native species. This hasbecome a particular problem for some western trout species in areas whererainbow trou...
Horseshoe crab studies providing new insight into valuable ancient creatures
... on the beach and lay their eggs.During these mass spawning
events crab densities may exceed 100,000 permile o...idesthroughout May and early June. "Some crabs are spawning
any time the tideis up," says Gregory Breese, a biologist with the FWS Delaware Bay EstuaryProject. ...
Nearly half of Earth's land has been transformed by humans; 50 'dead zones' found in oceans
...ctshores from erosion and provide nursery areas or spawning
habitat foreconomically important species. Massive changes in the Earth's environment have far-reaching implications thatresult in conflicts across political boundaries, Lubchenco said. "Scarceresources such as water or fishing rights lead to bat...
Mosquito fish may be wiping out amphibians
...ito fish to eatdisease-carrying mosquito larvae-is spawning
an environmental disaster. It turnsout that the fish prefer eating tadpoles, and this may be a leading cause of thecrash in amphibian populations round the world. "Exotic predators are one of the top three causes of amphibian decline,and mosqu...
USGS designs fishway for Little Falls Dam
...cies of shad, herring, perch and striped bass from spawning
in ourneighborhood. That ends today. Under an inno...ing about 10miles of historical prime breeding and spawning
habitat above the dam. Theinability of the fish to traverse the dam may have contributed to the decl...
Scientists discover how to make nanostructures assemble themselves
... behavior of materials at very small scales, while spawning
many basic research questions. It also could pave the way to a new generation of miniature products, from computer memory chips and video components to devices for sorting DNA molecules. Professor of electrical engineering Stephen Chou and graduate...
El Niño's dramatic impact on ocean biology and carbon dioxide captured by unique monitoring system
...s to the lowest ever recorded in December 1997 and spawning
the largest bloom of microscopic algae ever seen in the region the following summer. According to new results published in the December 10 issue of the journal Science, El Niño also dramatically reduced the amount of carbon dioxide normally r...
University of Colorado salmon study spawns new insight into human brain aging
...er biologists found that specific brain regions of spawning
salmon exhibit neurodegeneration and amyloid plaqu...ans. But other brain areas used for migration and spawning
tasks continued to function, despite the presence of beta-amyloid plaques, Maldonado said. Olfacto...
Princeton scientists describe genetics of blood stem cells
...cing act between maintaining their own numbers and spawning
progeny that go on to become the many types of mature specialized cells of different tissues and organs. "Very little is known, in any mammalian stem cell system, about how the underlying molecular biology allows these cells to make choices about th...
Fishing woes will cast need for aquaculture biotech
...of aquaculture tanks at COMB has led to successful spawning
and raising of several marine species in warehouses in Baltimore, he said. DNA fish vaccines will be developed for diluting in tanks of water, said Zohar, thus vaccinating hundreds of fish at once through the skin. (The science of developing fish va...
University of Georgia geneticist among the first to study genetic mating systems of fishes and turtles
... from another nest, perhaps "priming the pump" for spawning
by their own mates. This amazing behavior was genetically documented in the euphoniously named fifteen-spine stickleback. Egg thievery, Avise notes, might seem to be counterproductive because the male would wind up with foster young to tend, since th...
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