dogofwar;3917137; said:There isn't agreement about what constitutes a species...among scientists or hobbyists![]()
This is true.
dogofwar;3917137; said:But every place where fish are collected does not equal a new distinct population or varient of a species.
Matt
This unfortunately is debatable. If you collect fish from three different areas and wanted to take it to the "nth" degree, it would be separate distinct populations. Not everyone chooses to do it this way. For some it's just a Carpinte. For other more advanced hobbyists as on this board, the population designation, while not needed is an interesting fact to have. Some collection locations do have varying geographic characteristics that may not be common to other locations. Even subtle differences may be enough to evoke a change. Look at the Labridens complex as an example.
dogofwar;3917178; said:thanks mo - I haven't cracked the code for posting from google earth
the real question is whether these are consistently isolated areas that don't share water...even as the result of periodic floods, etc. One place we collected in Uruguay was a pond next to the rio Uruguay (big river). In the pond were lots of river fish: piranhas, leporinus, big cats. Would these be separate varients than the river? I don't think so because they found their way into this pond (and maybe out of it) during periodic flooding
Also, this is an urban area. I wonder to what extent people, as a result of fishing, etc introduce or move fish.
Matt
For what it's worth, print to a PDF, save as a TIFF file.
Regardless of whether the areas have spill over, the fact remains that for the most part access is limited at best. Population isolation would be the strongest single factor in the development of the species. No doubt they "share" water. Check out the Google map. You can see the connection. Areas like that Marsh would likely be more susceptible because of its proximity to both bodies of water.
It is an urban area in Mexico, I can almost guarantee that it's a one way trip to the dinner table.
