Later On

A blog written for those whose interests more or less match mine.

Interesting human-based evolutionary pressure on bass

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Susan Milius reports in Science News:

The same qualities that make a largemouth bass an easy mark for anglers make him a successful dad. So recreational fishers, a new study suggests, may be accidental forces of evolution, selecting against the best in male fish parenting.

“Does that mean that bass populations are imminently in danger of becoming too hard to catch and at the same time totally inefficient at reproducing? Not really,” says study coauthor David Philipp of the University of Illinois at Urbana-Champaign. “Does it mean that we are impacting populations of bass in ways that we never envisioned and don’t understand well at all? Most certainly.”

Among the prized sports fish Micropterus salmoides, it’s the dads that do the child care. They go for weeks without food to guard their nests from predators or to swim protectively nearby as tiny fry start exploring the big wet world.

In a study of fish dads in experimental ponds, . . .

Continue reading.

Written by LeisureGuy

5 December 2012 at 11:59 am

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