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Author Topic: How do invasive fish manage to invade??  (Read 148 times)  Share 

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Online Brewguy

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How do invasive fish manage to invade??
« on: April 17, 2018, 01:43:03 PM »
I was thinking about flat head catfish.  How do they manage to get past the york haven dam to make their way up to harrisburg.  I know they open the spillway a couple times a year, do the fish really swim up the current? 

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How do invasive fish manage to invade??
« on: April 17, 2018, 01:43:03 PM »

Offline DRY

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Re: How do invasive fish manage to invade??
« Reply #1 on: April 17, 2018, 02:43:32 PM »
I have attached a couple of interesting articles on the flathead catfish and the snakehead fish. The articles describe how and why they initially got into Pennsylvania and other eastern watersheds. Apparently the flathead is native to some parts of the U.S. but the snakehead is not.

https://nas.er.usgs.gov/queries/FactSheet.aspx?SpeciesID=750

http://www.lehighvalleylive.com/sports/index.ssf/2013/09/northern_snakehead_invading_de.html

As far as getting across dams...many dams in PA are low head dams and during times of high water fish can get across the dams even with the current.
A number of dams in PA now have special fish ladders or elevators that help the fish get above the dam. I believe there is one around TMI/Brunners and there is one proposed for the York Haven Dam. They have even talked about a similar fish passage way at the Fabridam in Sunbury.

http://www.pennlive.com/midstate/index.ssf/2015/04/fishway_near_york_haven_dam_to.html

Bill
The hours spent fishing are not subtracted from the lives of men!!

Offline FM

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Re: How do invasive fish manage to invade??
« Reply #2 on: Today at 12:23:03 PM »
People dumping out their snakehead aquarium fish are a big part. I saw a giant goldfish in the Delaware Canal once years ago. People releasing their catches into waters to "improve" the fishing is another. The term is "bait bucket biologists", Guys who think that they know what is better that the professionals. Lake Carey, when I was a kid there, never had smallmouth bass. Years later there is a thriving population of them that I was told were imported from Oneida Lake.
FM

Online Brewguy

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Re: How do invasive fish manage to invade??
« Reply #3 on: Today at 03:22:40 PM »
FM I think there is probably a lot of that and then nature takes care of the rest. 

Dry those were interesting links, thanks. 

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Re: How do invasive fish manage to invade??
« Reply #3 on: Today at 03:22:40 PM »

Offline DRY

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Re: How do invasive fish manage to invade??
« Reply #4 on: Today at 04:04:26 PM »
...Lake Carey, when I was a kid there, never had smallmouth bass. Years later there is a thriving population of them that I was told were imported from Oneida Lake.
FM

Is Lake Carey open to the public?
Is there boat access?
Is their shore access?

Any other decent smallmouth lakes in northern PA?

Thanks

Bill
« Last Edit: Today at 04:06:15 PM by DRY »
The hours spent fishing are not subtracted from the lives of men!!

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Re: How do invasive fish manage to invade??
« Reply #4 on: Today at 04:04:26 PM »

 

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