Animal breeders long have known that it takes only a few generations of controlled mating to influence such behavioral traits as fierceness or
tameness in dogs.
Experimental selection for
tameness in silver foxes [7], rats [8,9] and mink [10] have shown the power of the directed pathway of domestication.
«This is a needed paper that convincingly shows some of the drivers of island
tameness in lizards.»
Changes in the cells» migration might account for many physical traits linked to
tameness in domesticated animals.
Not exact matches
Stock markets have seen steady gains with little volatility
in 2017 — do not let the recent
tameness instill a false sense of security as markets can periodically behave like wild beasts.
In the animals we domesticated through genetic transformation, «Wild, human - threatening, and human - fearfulness instincts are eliminated and replaced by
tameness, an acceptance or desire to be near humans, and often, other specific human - serving personalities.»
(Adventures of Ideas, New York: The Free Press, 1967, 257) These discordant feelings,
in themselves destructive and evil, make a contribution by producing «the positive feeling of a quick shift of aim from the
tameness of outworn perfection to some other ideal with its freshness still upon it.»
Thus the contribution to Beauty which can be supplied by Discord —
in itself destructive and evil — is the positive feeling of a quick shift of aim from the
tameness of outworn perfection to some other ideal with its freshness still upon it.
Scientists agree that dogs stem from wolves, but where, when and how many times dogs were domesticated — passing down
tameness and other traits over generations — has been rethought many times
in the last few years (SN: 7/8/17, p. 20).
«Other studies have seen a relationship between
tameness and stress responses
in animals,» said Jessica Hekman, the first author of the paper who worked on the study as a graduate student
in the laboratory of University of Illinois animal sciences professor Anna Kukekova.
Changes
in body size, reproduction and metabolism happened quickly, even though the researchers were only choosing birds for
tameness.
Choosing animals for
tameness might be selecting for ones that have changes
in how their neural crest cells function, the researchers proposed
in Genetics
in 2014 (SN: 8/23/14, p. 7).
It wasn't until 2014, however, that researchers offered a single explanation for the phenomenon of floppy ears, smaller teeth,
tameness and other «domestication syndrome» traits: a mild deficit
in neural crest cells.
Scientists propose that
tameness and the appearance of domesticated species may be linked to defects
in multitasking cells
in the early embryo.
In a renowned study started back in the 1950s, Russian researchers found that captive silver foxes bred for tameness also exhibited a suite of other traits, such as white patches of fur on their heads, curly tails, «feminized» faces with shorter snouts and floppy ears, and skulls in males that weren't much larger than in female
In a renowned study started back
in the 1950s, Russian researchers found that captive silver foxes bred for tameness also exhibited a suite of other traits, such as white patches of fur on their heads, curly tails, «feminized» faces with shorter snouts and floppy ears, and skulls in males that weren't much larger than in female
in the 1950s, Russian researchers found that captive silver foxes bred for
tameness also exhibited a suite of other traits, such as white patches of fur on their heads, curly tails, «feminized» faces with shorter snouts and floppy ears, and skulls
in males that weren't much larger than in female
in males that weren't much larger than
in female
in females.
Darwin also was the first to discover that selective breeding for
tameness produced similar side effects
in different animals, including smaller brains.
This article appeared
in print under the headline «On
tameness and tail - dropping
in island lizards»
Such changes could have been instrumental
in the development of
tameness and increased social interactions with humans.
Breeds differed significantly
in their fear of humans — a trait labelled «
tameness / wildness».
With this exhibition, one can see an answer
in its very
tameness.
The thought is far off - topic, but I'm reminded of a Russian study on breeding foxes for
tameness, which resulted
in numerous unexpected features (like border - collie coloring) within a decade.