http://books.google.com/books?id=RT...X&oi=book_result&resnum=6&ct=result#PPA784,M1
Page 784 - Section "Tributaries"
Found a great read on all 3 river tributaries in question.. and I must say JD7.62, that you were very correct in their isolation.. many bluffs, plateaus, gorges, and rapids along each river, especially towards the mouth.. However, there are other minor streams/rivers that branch out towards each other, especially near the southern tips of the Tapajos and Xingu.. and if these areas are to be considered 'flood plains' I could definitely see these minor tributaries branching out and crossing paths.. I could see migration occurring here, not at the amazon near the mouth of each individual river system..
Again, a single specimen isolated within an entire group of other specimens would be forced to hybridize and effect the entire gene pool for many years. A single rogue male Henlei could of effected a population of Leopoldi for YEARS and now hundreds of years later we see the minor side-effects of this rogue Henlei..
I believe that migration through the mouths of each river, after reading that, is near impossible unless they become completely flooded.. and my reasoning tells me that these 'gorges' and 'ravines' being carved out by the rivers would be the product of large amounts of rising, rushing waters flowing through them.. Perhaps a byproduct of heavy rainfall and draining of the 'flood plains', therefor they never really flood near the mouths of the rivers, but more to the south in the larger open areas?
Page 784 - Section "Tributaries"
Found a great read on all 3 river tributaries in question.. and I must say JD7.62, that you were very correct in their isolation.. many bluffs, plateaus, gorges, and rapids along each river, especially towards the mouth.. However, there are other minor streams/rivers that branch out towards each other, especially near the southern tips of the Tapajos and Xingu.. and if these areas are to be considered 'flood plains' I could definitely see these minor tributaries branching out and crossing paths.. I could see migration occurring here, not at the amazon near the mouth of each individual river system..
Again, a single specimen isolated within an entire group of other specimens would be forced to hybridize and effect the entire gene pool for many years. A single rogue male Henlei could of effected a population of Leopoldi for YEARS and now hundreds of years later we see the minor side-effects of this rogue Henlei..
I believe that migration through the mouths of each river, after reading that, is near impossible unless they become completely flooded.. and my reasoning tells me that these 'gorges' and 'ravines' being carved out by the rivers would be the product of large amounts of rising, rushing waters flowing through them.. Perhaps a byproduct of heavy rainfall and draining of the 'flood plains', therefor they never really flood near the mouths of the rivers, but more to the south in the larger open areas?
