Tag: "hen" at biology news
Scientists discover how climate change causes the simultaneous boom or bust of multiple populations
...roductive success of the Red Grouse by causing the hen
to lay fewer eggs and by reducing the likelihood that those eggs will hatch. His earlier research also had shown that climate conditions can influence both the transmission of the parasite and the survival of the grouse chicks. Warm and wet conditi...
Meaningless sex? Male mounting reduces sexual promiscuity of females
... not only drastically inhibits the propensity of a hen
to mate with a new rooster but also reduces the number of sperm that she obtains from a new rooster in the 24 days following mounting. The researchers therefore showed that roosters can defend their paternity by reducing the promiscuity of the hens t...
Promising preclinical results with live attenuated H5N1 vaccines
...grew larger quantities of the resulting viruses in hen
eggs, and tested the vaccines in chickens, ferrets, and mice. In tests of safety, the study found that, unlike the natural viruses from which they were derived, the vaccine strains did not cause death when injected into the bloodstream of chickens, ...
Existing vaccine facilities can handle flu pandemic
...a pandemic. Currently, flu vaccines are made from hen
eggs, but in light of a possible pandemic and ongo... said. It takes much longer to compile millions of hen
eggs than it would to grow up existing cell lines from frozen vials, Lash said. While cell culture h...
It takes a village -- female ducks negotiate joint rearing of ducklings
...ish archipelago to test predictions about how each hen
seeks to maximize her benefits from the partnershi...into cliques pairs, trios, or quartets with each hen
in a group assuming a distinct role. "Waterfowl have a reputation as being none-too-bright, but w...