Asian Arowana Evolution

[Aquanero]

This is a great article that explains the evolutionary path of the Asian arowana. It's a little heady but has some interesting insight and information.

http://www.biology.ualberta.ca/courses.hp/biol606/papers/Kumazawa+00.pdf

 

[Oddball]

Interesting read. I'm a little disheartened that they missed, or chose to omit, any present-day link to the eocene Genus: Phareodus sp. I would have thought that line to be pertinent in explaining the divergent path to modern-day Hiodon. sp. or the regional differentiation of similar physiologic types after plate separation dividing species between N and S america.

 

[Aquanero]

I guess they were just following the species Scleropages and not mentioning any ancestral or divergent species. I like reading about evolution, divergences and last common ancestors too. I is interesting to see how evolution works and forms evolve to take advantage of their environment and fill ecological niches.

Here it is Phareodus one of the proto Arowanas.

 

[Chicxulub]

I really like this post, Tom. The extinct osteoglossid lineages in the Americas have always fascinated me. I wish there was more literature on them, I've not had much luck ferreting out info. I really appreciate the link!

 

[Aquanero]

The evolution of fresh water fish always interested me too. I love reading about cichlid evolution in particular and species separated by the Wallace Line, last common ancestors etc.

 

[Aquanero]

These type threads always take the slow agonizing death spiral into oblivion.

 

[RDFISHGUY]

These type threads always take the slow agonizing death spiral into oblivion.

That's because this is total science nerd stuff. Most of us are just your average fish geeks. LOL. It's a good read..... if you are trying to go to sleep.

 

[Aquanero]

That's what I thought.