There are no regulations in place to stop breeding for extreme or exaggerated characteristics.
Broadcast on the BBC, "Exposed" spawned three independent reports into purebred breeding, each finding that some modern breeding practices -- including inbreeding and breeding for "extreme traits," like the massive and short-faced head of the bulldog -- are detrimental to the health and welfare of dogs.
Some monasteries have become breeding grounds for extreme nationalism.
"If you're breeding dogs with extreme body shapes, no matter how good a breeder you are, you are still putting the puppies at very, very high risk of quite a long list of conditions".
Beissinger also calculated that if the wild Devils Hole pupfish numbers become small enough, it may be necessary to remove the entire population into a captive breeding program, an extreme measure he called a "California condor moment" because such a controversial action was used to rescue the condor from extinction in 1986.
Whether similar variation is also present in other species or systems (e.g., breeding under less extreme environmental conditions) remains unknown.
These birds at the leading edge of an expansion of breeding range show extreme individual variation in profiles of adrenocortical responses to acute stress compared with individuals in ancestral habitat or with individuals of other sub-species naturally breeding in alpine meadows (Addis et al., 2011; Fig. 5).
Thus, we could show that by selectively breeding mice for extremes in stress reactivity, clinically relevant endophenotypes of MD can be modelled.
Thus, by selectively breeding mice for extremes in stress reactivity, clinically relevant endophenotypes of MD can be modelled, presumably including the symptomatology and pathophysiology of specific subtypes of depression.
High and persistent levels of joblessness have proved fertile breeding grounds for the extreme right: fascism is now more evident in Europe than at any time since the second world war.
