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Last edited by Shorty; 07/29/17 09:31 AM.


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Shorty, your fish have beautiful yellow colors on the underside and on the lower fins. Very striking. I notice your pond is in NE. I notice the fish from sparkplugs fish (Freedom, Indiana), have some of the yellow color too. Any way the two of you can compare what it is in your water, nutrients, feed, etc that brings out the yellow color?

Have either of you tested water for pH, hardness, iron, trace minerals etc in the past where you could line up the results and look for a common theme or clue?

beautiful fish!

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I think the more vivid yellow tinting is partially diet and the lack of darker pigmentation. The lack of darker pigmentation is likely due to sexual immaturity and the pictures being taken outside of the spawn. I fully expect my larger, sexually mature dominant RES to darken up quite a bit in late May and June. IMO the lack of darker pigmentation also affects the appearance of the ear tab coloration as well making it appear more orange than red in males, "tweeners" as TJ likes to call them.

I am going to focus on taking pictures of 7"+ fish as we get closer to the spawn to focus on more sexually mature fish. One thing I have noticed taking pictures of the urogenital openings is that there may be some slight, but noticeable differences in the length of the pelvic fins when laid flat against the body that might be gender specific.

Last edited by Shorty; 04/23/15 10:37 AM.


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could be diet, age/maturity, but your picture of your golden shiner from earlier this year has amazing yellow on the bottom fins as well.

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Most likely diet. Here is a Puget Sound cutthroat with yellow tinted fins, I have been told that cuts with yellow tinted fins are unique to the Puget Sound area. I do know that the Puget Sound has large numbers of diverse amphipods.




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A few more from tonight. The smaller 5-6" RES seem to have brighter yellow colors to them while the larger RES are not so vivid, is there change in diet as they get bigger affecting color?

Also, in the 5-6" size class I am seeing slightly longer pelvic fins in the RES that I suspect might be male, the pelvic fins actually cover the urogenital opening when up against the body. Ones I suspect might be female in this size class the pelvic fins are well short of the opening. A little more investigation closer to the spawn should reveal if this natural variation in individuals, or an actual gender difference one could look for.

Likely Male. wink
http://i443.photobucket.com/albums/qq153/Squidge_04/20150424_172214_zpsggfrsrid.jpg

http://i443.photobucket.com/albums/qq153/Squidge_04/20150424_172228_zpssvdzlduu.jpg

Last edited by Shorty; 07/29/17 09:32 AM.


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Last edited by Shorty; 07/29/17 09:33 AM.


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Tweener? grin (I suspect this one is a male but the short pelvic fins and creamy underside make me wonder.)

http://i443.photobucket.com/albums/qq153/Squidge_04/20150424_173403-1_zps6cevcueb.jpg

http://i443.photobucket.com/albums/qq153/Squidge_04/20150424_173437_zps2xlwrwmr.jpg

Likely male. wink

Last edited by Shorty; 07/29/17 09:34 AM.


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Why are you rolling your RES in the dirt? I'm having enough trouble IDing them as it is.

Also...do I detect a little bead of blood? Dang vicious RES strikes again!


Many men go fishing all of their lives without knowing that it is not fish they are after. ~ Henry David Thoreau

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Originally Posted By: teehjaeh57
Why are you rolling your RES in the dirt? I'm having enough trouble IDing them as it is.

Also...do I detect a little bead of blood? Dang vicious RES strikes again!


grin

That vicious RES was not cooperative with pictures last night, that tweener jabbed me hard enough to draw blood then jumped off the board and rolled in the dirt.

blush


Last edited by Shorty; 04/25/15 09:03 AM.


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After dinner tonight, all females I believe, and all caught in a 4 minute time frame in the same spot.

http://i443.photobucket.com/albums/qq153/Squidge_04/20150426_192842_zps16obf5v1.jpg

http://i443.photobucket.com/albums/qq153/Squidge_04/20150426_192853_zpsduoscpni.jpg

Likely female. wink


Last edited by Shorty; 07/29/17 09:34 AM.


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Last edited by Shorty; 07/29/17 09:35 AM.


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Last edited by Shorty; 07/29/17 09:37 AM.


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Originally Posted By: snrub
Originally Posted By: CJBS2003
I placed what I thought were 10 all male RES into my pond. One was not... 90% is pretty good accuracy, but not good enough. Fortunately, I wasn't that upset about the mistake. So far I have stocked over 3 dozen all male BG into the pond and 16 all male GSF. The big question will be if the RES female will only spawn with the male RES or look for some love from the BG or GSF. There will also be male and female RBS in the pond as of this spring.


CJBS2003, I'm curious if you have any update information to this very interesting pond stocking. Have you seen any recruitment RES/BG or GSF/RES hybrids?

I'm seriously considering building an additional half acre pond this coming spring. What I would like to try for stocking is FHM, RES (male & female) for the primary fish, then add a half dozen female GSF in hopes of getting some GRES hybrids. I would let the pond go two or three years and if/when over population looked to become a problem put some male only LMB in for recruitment control.

I have a sediment pond and forage pond with RES, an old pond with GSF and a 3 acre pond with LMB that I can use for stockers, so that will not be a problem.

I'm just curious to see how your mostly male pond with the male/female RES in it is turning out.


Sorry, just saw this post. It appears I got reproduction. I'm certain most are not hybrids but it appears I got some hybrids. These hybrids are small now. As they get into the 3 to 4 inch range, more positive ID will be easier and I'll advise. I ended up stocking more RES when I realized I had added both sexes. We'll see how it plays out.

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A few more from after dinner tonight. Two likely males and one female. The first male is a dandy and likely one of my original stockers, my first one over 10". grin

Take note of the shape and size of the urogenital openings.

http://i443.photobucket.com/albums/qq153/Squidge_04/20150427_193922_zpsllqsn60t.jpg

http://i443.photobucket.com/albums/qq153/Squidge_04/20150427_193933_zpsadvy5ija.jpg

Last edited by Shorty; 07/29/17 09:38 AM.


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Last edited by Shorty; 07/29/17 09:39 AM.


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Last edited by Shorty; 07/29/17 09:39 AM.


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Last edited by Shorty; 07/29/17 09:40 AM.


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Last edited by Shorty; 07/29/17 09:40 AM.


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Last edited by Shorty; 07/29/17 09:41 AM.


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Shorty - Great pictures. Thanks for taking time to get pictures and then to post them. Very good examples of male and female features. This very good information will help many pond owners who are interested in working with redear sunfish. This sexing of redear sunfish thread was added to the RES section in the Sunfish Primer in the Archives.

Last edited by Bill Cody; 04/28/15 07:38 PM.

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No Shorty, not getting tired of pics. Thanks for posting them.


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OK, here is one more. grin

I almost always have my cell phone with me so taking pictures is never an issue.

If you look closely you can tell that this one is recovering from a cold water fin fungus that happened over the winter, both pectoral fins and tail have issues.

IMO this one is likely female based on the ear tab and the urogenital opening.

http://i443.photobucket.com/albums/qq153/Squidge_04/20150429_194327_zpsmfllwjtj.jpg

http://i443.photobucket.com/albums/qq153/Squidge_04/20150429_194338_zpsq2xmnvkl.jpg

It will interesting to see how much they darken up in the next 5 weeks as the spawn gets closer.

Last edited by Shorty; 07/29/17 09:41 AM.


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Shorty, are they moving into pre-spawn or maybe staging off the spawning areas yet? Wasn't sure what your water temps are currently. I noticed several RES nosing into the pea gravel spawning areas this evening, not nest building yet, but definitely thinking about it.

No bluegills, just RES.


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If we accept that: MBG(+)FGSF(=)HBG(F1)
And we surmise that: BG(>)HBG(F1) while GSF(<)HBG(F1)
Would it hold true that: HBG(F1)(+)AM500(x)q.d.(=)1.5lbGRWT?
PB answer: It depends.
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I love the pictures and analysis Thanks! So the female vs male difference on the shots of the urogenital opening.. how would you describe the difference so others can see what you are seeing?

TO me the front hole is consistent male/female, the back hole is round and small on the male and on the female seems to have an upside down keyhole shape with the horizontal part near the front and the arch going towards the rear.






Is there a better way to describe the difference? Or another difference?

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