|
|
Post by davetipping on Feb 13, 2010 22:29:10 GMT
 Here's another mystery fish, caught at Hunter's Lodge last autumn. Give me your verdicts on its identity and then I'll let you know what I think. |
|
|
|
Post by bra1n on Feb 14, 2010 15:08:45 GMT
Silver Bream ? Looks very similar to this one I caught in 2007 a bit further downstream.  Gained me a point in the species race for that year anyway  |
|
|
|
Post by gcb on Feb 14, 2010 19:14:12 GMT
A little un, but I'd say silver bream also - doesn't look like a skimmer
geoff
|
|
|
|
Post by frim on Feb 14, 2010 21:57:03 GMT
Hundreds get caught every winter on the matches between Hunters and the bottom peg at Linton and they are always referred to as Hybrids mainly because every one is slightly different. We used to catch a lot of true silvers in the fens years ago and they were very slim fish, the ones on the ouse usualy have a chunky feel like roach, but the pictured fish fits the silver bill on a scale count.
Dave did you know that silver bream are one of the only fish that they have never proved actualy hybrid?
|
|
|
|
Post by mr knowbody on Feb 14, 2010 22:48:19 GMT
Hybrid + hybrid. (mostly bream + roach/whatever)
Yes they can. (imo)
|
|
|
|
Post by davetipping on Feb 15, 2010 21:36:42 GMT
I thought it was a silver bream at the time of capture and indeed, maybe it is.
However, I tried to do a lateral line scale count from the photo - difficult, because the scales are a little uneven/deformed around two thirds of the way from head to tail - and came up with a figure of 49 or 50. The maximum for a silver bream is 48, minimum for a common bream 50. We are all agreed it's not a common bream, so if my scale count is correct it must be a hybrid of some description.
I thought possibly a common bream x silver bream (didn't know silvers had never been proved to hybridize, Frim) or maybe a so-called F2 hybrid (i.e. where one of the parents is a hybrid, so maybe common bream x [roach x common bream]). Guess we'll never know for sure!
|
|
|
|
Post by mr knowbody on Feb 16, 2010 22:30:41 GMT
Do you think that the percentage of hybrid in the mum or dad's genetics has a bearing on the capacity for one or the other to produce viable sperm/egg's? (I do)
20 years ago I was catching what at the time I thought were roach/chub hybrids that were stocked into a newly aquired club dam. (by the ea/rivers authoraty? at the time) I am now convinced they were ide, they were not small fish eather, every one was at least 1lb.
The wierd thing is before the club took over the dam the only fish in there were perch and pike. The perch all 1lb+ (up to 3) did'nt last a year after the stocking.
Hybrids have interested me ever since.
|
|
|
|
Post by davetipping on Feb 17, 2010 21:46:50 GMT
Do you think that the percentage of hybrid in the mum or dad's genetics has a bearing on the capacity for one or the other to produce viable sperm/egg's? (I do) Guess this is probably the case Mr Knowbody. It's not so long since the perceived wisdom was that all hybrids were infertile, but that is clearly not the case. Fish identification could be a real minefield if we started getting F3 and F4 hybrids! |
|
|
|
Post by mr knowbody on Feb 21, 2010 22:35:43 GMT
A good point dave, but lets forget the man made stuff for a moment.
In the wild, knowbody grades or names things. F,nothing if you will.
SO, if there is more than one spieces of a closly related cypranid in any givern body of water, are they viable for a record claim? One rudd an it's all over?
I've done the crusion record more than once, but I would never try prove it, for obvious reasons.
|
|
