Guppies in the safer waters also lived longer and had fewer and bigger offspring.
For most parents, the big issue about child care is its quality, and the effect it might have on the emotional and intellectual development of their offspring.
This impels Mom and Dad to tilt in favor of their biggest, healthiest offspring, since those kids will be more reproductively successful and get more of the family's genes into the next generation.
This belies the common image of migrants as big producers of unauthorised offspring.
Of course, you're going to make a big bet on your offspring.
(It was produced by CBS Films, a division of the CBS Corporation. But it's a small-ville after all: the CW is the offspring of big CBS and Warner Brothers Entertainment).
The baleful reality is that the big banks, the freakish offspring of the Fed's easy money, are dangerous institutions, deeply embedded in a bull market culture of entitlement and greed.
But scientists have now shown that hybridization between two animal species can have a big advantage for their offspring.
A good mare can birth only up to 15 foals in her life span, but can still command big bucks: The fourth offspring of Dancing Mahmoud, an 11-year-old mare, sold recently for $1.7 million; her first claimed just $80,000 back in 1996.
In crosses between PPCD1 and DBA/2J mice (N5 through N8, n = 204), 52% of the offspring exhibited big eyes, consistent with autosomal dominant inheritance at a single locus, designated Ppcd1, and complete penetrance in the DBA/2J background.
