Posted by Bluerod on March 31, 2004 at 14:01:00:
In Reply to: Re: G-dam tailrace posted by Bluewater on March 31, 2004 at 07:51:18:
I did a Google search, two of the hits were the following:
http://www.nighthawkpublications.com/journal/journal150-1.htm; this is an interview with Steve Pope, conducted a few years ago.
From the second link is this nice little tidbit about Weiss Lake (wonder if STATE OF ALABAMA fisheries has studied Big G like they have Weiss!):
The answer to your question is yes, striped bass do go through a spawning run. As for reproduction, no the eggs do not survive in most cases. The reason for this is simply that the stripers cannot swim far enough up a given river before being stopped by dams, shallows etc. They will go through the spawning process, however the eggs need to be able to drift downstream for 2-3 days before hatching, as well as the fry which need to absorb their yolk sacs before becoming free swimming. If the eggs and fry arrive back in the lake before this occurs, they suffocate from silt that settles out on top of them.
As for imprinting, the Alabama Fisheries Biologists discovered that stripers in the Coosa River chain were naturally reproducing in the 1990's. They suspected that the fish were Gulf strain stripers stocked by GADNR in 1993-94 in both Allatoona and Carters Lakes. Prior to this GADNR had stocked approx. 4.7 million Atlantic strain stripers in the GA section of the Coosa river chain. Electrofishing samples were taken in March of 1994 and 4 one year old stripers were taken for DNA testing. They expected that these samples would show that the stripers had come from the impoundments in GA, however the tests revealed that the fish were in fact Atlantic strain stripers. Their conclusion was that the stripers from Lake Weiss were in fact reproducing.
Here is another interesting result of sampling by ADWFF. Because of the increased number of stripers in Lake Weiss, biologists were concerned about their impact on the gamefish population. A diet study of 450 striped bass was conducted with the following results:
115 had empty stomachs. The remaining 355 had a total of 2,669 prey items. They consisted of the following:
2,552 were shad (93.4%)
160 were unidentifiable fish remains (5.9%)
6 were crappie (0.2%)
5 were bluegill (0.02%)
3 were minnows (0.1%)
2 were freshwater drum (0.07%)
and finally 1 was crayfish (0.04%)
Apparently these findings were similar to studies conducted in Oklahoma, VA, SC, FL, AK, UT, and TN. The overwhelming conclusion by fisheries biologists from all of these states is that sport fish are not a major prey item for striped bass. In addition both Auburn University and ADWFF have conducted studies on the impact of stripers on game fish through competition for food. Both concluded that there are no adverse affects on the crappie or bass populations by the presence of stripers in Lake Weiss.
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