Something to cheer you up on a Sunday

[alfredo]

natural selection at work.
http://news.bbc.co.uk/2/hi/science/nature/4281171.stm


David Conover, of Stony Brook University in New York found a two-fold change in productivity in Atlantic silversides within just four generations of fish.

"By selectively harvesting the largest fish, we end up changing the whole biology - not only growth rates, but egg size, fecundity, feeding behaviour," he said.

"The scary part is that when we stopped size-selective harvest, the biology didn't change back, it was permanent."

[NMDemDist2]

1. oh yeah, that certainly cheered me up

<sarcasm off

[alfredo]

2. Glad to

do my part.

</sarcasm>

Atlantic Cod have been shrinking in size.