Zander

[norfolkfisher]

I'm doing a project on introduced species and as to whether certain types actually a problem or not, my feeling is zander aren't a problem. But any feedback will be most helpful and most appreciated.

 

(Also we will see if anglers views are the same as the waterways view)

[norfolkfisher]

Sorry seen a problem

 

1) Yes=Good

2)No=Bad

3)Yes= Good but need to be controlled

[noodle996]

alien species are detrimental full stop be they carp zander cats etc.

 

they cannot be controlled once released

[norfolkfisher]

alien species are detrimental full stop be they carp zander cats etc.

 

they cannot be controlled once released

 

I think in most cases thats true especially with cats and carp, but though im not basing this on fact, i feel that zander where they're present have no/few ill affects on the surrounding species/eco-system. Thus seeing as theres no need to, any cull/control would be uncalled for.

[lutra]

alien species are detrimental full stop be they carp zander cats etc.

 

they cannot be controlled once released

And what do you fish for in Merseyside.

[Anderoo]

The trouble with polls is that they eat all our fish, sorry I meant they are very rigid and don't always offer complex enough responses (no disrespect to you, NF). A waterway can only support a certain biomass of predatory fish, so if zander are introduced the pike population is likely to suffer. However, the biomass of silver fish on which they feed will remain constant, once the initial balancing has taken place. So really, introducing zander to a waterway will have no long-term effect on a waterway except there will be fewer pike. Whether that's a good or bad thing is a personal opinion.

[norfolkfisher]

The trouble with polls is that they eat all our fish, sorry I meant they are very rigid and don't always offer complex enough responses (no disrespect to you, NF). A waterway can only support a certain biomass of predatory fish, so if zander are introduced the pike population is likely to suffer. However, the biomass of silver fish on which they feed will remain constant, once the initial balancing has taken place. So really, introducing zander to a waterway will have no long-term effect on a waterway except there will be fewer pike. Whether that's a good or bad thing is a personal opinion.

 

That is actually very true, but i think the fortunate thing is pike will hopefully always outcompete zander as long as no more are introduced. I would hate to see pike disappear just because of zander. Though perch do seem to be flourishing round here despite the Zander.

[noodle996]

And what do you fish for in Merseyside.

 

 

i dont if i can help it you would have to see the local waters far too many bivvys

[Colin Brett]

Can be good can be bad!

 

Provide lots of fry for other predators to eat, but those fry can eat an awful lot of food that roach, bream, tench etc, etc, could eat.

They also provide cormorants with another food source which again can be good or can be bad.

 

However I enjoy catching them.

 

 

Colin

[Andy Macfarlane]

Why not look for information on coarse fish stocks and balances of European waters, where zander are already common? If they don't create problem over there, what problems could they cause, once a balance has been found, which would only come by leaving them alone?