BlogArena

General blog about anything and everything of everyday's life.

25. Aug 2019

March 12, 2014
by Guest Post
0 comments

Evolutionary study finds neglected fin may have a function

Fin’s emergence in many species challenges assumption that it’s a useless remnant Although present in more than 6,000 living species of fish, the adipose fin, a small appendage that lies between the dorsal fin and tail, has no clear function … Continue reading

January 9, 2014
by Guest Post
0 comments

Ancient sharks reared young in prehistoric river-delta nursery

ANN ARBOR — Like salmon in reverse, long-snouted Bandringa sharks migrated downstream from freshwater swamps to a tropical coastline to spawn 310 million years ago, leaving behind fossil evidence of one of the earliest known shark nurseries. That’s the surprising … Continue reading

August 6, 2013
by Guest Post
0 comments

From obscurity to dominance: Tracking the rapid evolutionary rise of ray-finned fish

ANN ARBOR — Mass extinctions, like lotteries, result in a multitude of losers and a few lucky winners. This is the story of one of the winners, a small, shell-crushing predatory fish called Fouldenia, which first appears in the fossil … Continue reading