Tag: "eggs" at biology news

DDT, PCBs, And Invasive Plants - USGS Scientists Examine The Effects Of Contaminant And Invasive Species On Wildlife

...rom thenest. Reduced hatching success of cormorant eggs was related to higer amounts ofDDE in eggs and to thinner eggshells. ("Effects of Organochlorine Contaminantson Double-Crested Cormorants Nesti...

Lake George Water Is Death On Zebra Mussel Larvae

...sel pair can produce and fertilize several million eggs a year."That's the bad news. The good news is that 98 per cent of these die even in themost mussel-friendly waters," Nierzwicki-Bauer said. Zebra Mussel Larvae Have Been Found in the LakeIn previous years, zebra mussel larvae, called veligers, have b...

Fewer Songbirds May Be Result Of Forest Fragmentation Across The American South, New Study Suggests

...ms access to ground-nesting songbirds. The loss of eggs andnesting areas appear to result in a decline in ...on predation risk,but they have largely used quail eggs to mimic songbird eggs, and this may notgive a complete picture of what is happening to diminish rep...

World's Oldest Known Fossil Reptile Nests Discovered In Arizona's Petrified Forest

... digging activity and egg impressions, although no eggs oreggshells were found. The fossil record for reptiles began in the Pennsylvanian Periodbeginning about 300 million years ago, said Hasiotis and Martin. The oldestprevious evidence for reptile-nesting sites include 110 million-year-old seatu...

Mouse Study Trumpets New Way To Preserve Species

...tissue from different species could produce viable eggs in immune-compromised mice, a strain of mice that ...hant. However, procedures to isolate and fertilize eggs from elephants and other exotic animals, and the techniques of transferring embryos into live animal...

New Research Shows Loggerhead Sea Turtles Sustain Delicate Dunes

...a shows. The results of the research shows eggs laid by threatened loggerheadsalong Melbourne Beac...trogen, phosphorus andlipids left behind by turtle eggs and the possible effects those nutrientshad on the beach ecosystem. Karen Bjorndal, a UF zoo...

Hopkins Research Team Cultures Long-Awaited Human Embryonic Stem Cells

...lls(PGC) cells that eventually would have become eggs and sperm. The single PGCswere placed on a "feeder layer" of mouse connective tissue cells, surrounded bya broth of nutrients and highly specialized growth factors. That providedsupport and other requirements for the PGCs to develop. "Hitting just...

Counting X Chromosomes To Determine Sex

...duce sperm that they canuse to fertilize their own eggs in the absence of males. The X chromosome in C. elegans, says Meyer, "has at least fourgenes, probably five or six," that signal the chromosome's presence Allthose X signals are believed to dampen the activity of a pivotal protein, calledXOL-1, th...

Garlic Perfumes Poultry Houses

...ust find creative solutions to producethe meat and eggs suburbanites want in their grocery stores but not ...ted taste testsand found that people preferred the eggs produced by the garlic-eating hens. "The tasters said the eggs were milder from the chickens...

First Dinosaur Embryo Skin Discovered -- Unhatched Embryos Are First Ever Found Of Giant-Plant Eating Dinosaurs

.... In addition totiny embryonic bones, many of the eggs contain patches of delicate fossilizedskin, provid...that periodically overflowed, burying theunhatched eggs on its banks in a layer of mud. The covering of silt protectedthe eggs, and some of their contents,...

Montana State University Scientist Contributes To Latest Dinosaur Discovery

...m a dinosaur nesting sitecovered with thousands of eggs over about one square mile. Jackson helpedconfirm ...ckson. Scientists have identified sauropod eggs based on bones found in thesame sediments as the eggs, but that method hasn't been accurate, she add...

Migratory songbird breeding linked to winter habitat

...sting sites and mates and anopportunity to replace eggs or nestlings that succumb to predation. But thefactors that give rise to early arrival have been poorly understood. To test their hypothesis that events taking place on the birds' winteringgrounds influence their condition and arrival time at the b...

Unknown contaminant found in seabird eggs

...ected tobe of marine origin, has been found in the eggs of Atlantic and Pacific Oceanseabirds. If a marin...turally produced organohalogen accumulating in the eggs ofwild birds. The research is reported in the Nov. 19 Web edition of Environmental Science &Technolo...

Common Cannibals, A New Study Examines The Role That Intraspecific Predation Plays In Determining The Dynamics Of A Population

... immobile life stages; adultbeetles mainly consume eggs and pupae, while larvae consume eggs. When the be... larger larvaewere relatively high, cannibalism of eggs was also very high, causing a largedecrease in egg numbers. This resulted in a smaller population o...

Clemson Fire Ant Research Uses Biological Approach

...ania, that reduces the ability of the queen to lay eggs so thecolony slowly dies over a period of six to e...ng bait." Since the queen lays up to 1,000 eggs per day for as long as sevenyears, fire ant colonies in South Carolina can include more than 250,000...

Atlantic Salmon Cancer Virus Identified

...vertical transmissionin reproductive products, the eggs and sperm of breeding salmon; or perhapsthrough horizontal transmission, with the virus entering the bodies through theskin or gills, in water they ingest or on food they eat. Our concern is thatthe virus is in the environment, and the levels of inf...

Bird Dads Suffer Infidelity But Bring Up Baby

...r males. The maleswere left for weeks to incubate eggs and then, as single parents, to raisechicks of unc...y bear full parental responsibility for incubating eggs and raising theyoung under one condition: When there is certainty that the young aregenetically his...

A Woman's Egg Can Be Freezer Friendly, If You Go Easy On The Salt

Human eggs don't freeze well -- or so IVF specialists have al... overcome the problem, by abandoning the idea that eggs should be frozen in a solution that resembles body fluids. The researchers have obtained hi...

Fool An Egg Into Thinking It's Fertilised, And It Will Repel All Comers

...chers have identified a receptor on the surface of eggs that binds to a sperm surface protein. By targetin...ptors on the egg has beendifficult, partly because eggs are harder to come by. Now, for the first time,Nicole Sampson and Hui Chen at the State University o...

Eggs Fertilised By More Than One Sperm Can Survive

...o be doomed. But biologistshave now found that pig eggs can engage in a ménage á trois with two ...y ofMissouri in Columbia, Han conducted IVF on pig eggs and implanted thosecontaining multiple sperm. About a twelfth of these embryos grew into healthypigs...

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