herefishiefishie Posted January 10, 2004 Report Share Posted January 10, 2004 Has anyone had any experience of this or tried any experiments???? I had some xmas fulus(victorian cichlid) had a colony going & wanted to add more. A store had 3 left all colourful, but I bought them all anyway. Thought I would off load excess males at a later date. The 3 & original male all bashed & chased each other(normal), to my suprise a few weeks later 1 male who at this stage had dropped its colours was holding, I was suprised for 2 reasons as(1) it was a male & (2)the agro it had taken, its gill & jaw were damaged from fights. so 2 weeks later stripped the now her & the result= fry. I have had a similar result with Burtoni's, placing bigger fry those colouring up into the established colony, to find some of these later on down the track holding...... In theory, Usually the larger fry are males & smaller females,assuming growth is slower in females. but is it?? "the fish that grows faster becomes males" note;no matter how well you feed fry there is always a difference in growth. I have since read that George W Barlow has done experiments with the Midas cichlids & the raising & seperation of fry, his result; the fish did not start of as m/f, "instead they became m or f depending on their relative size." so I plan to do the same experiment with the salvinis(yes to much time on me hands) Has anyone had any experiences with this???? Frenchy ps; also from the same book he had 2 orange chromide girls spawn successfully. -protogynous hermaphrodite??? Quote Link to comment Share on other sites More sharing options...
Ira Posted January 10, 2004 Report Share Posted January 10, 2004 This is REALLY asking for a sex toy or doll comment, but I'm not going to make one...Oh, oops, guess I just did... Quote Link to comment Share on other sites More sharing options...
herefishiefishie Posted January 10, 2004 Author Report Share Posted January 10, 2004 Ira don't need them here on the Gold Coast :lol: Frenchy Quote Link to comment Share on other sites More sharing options...
Alan Posted January 10, 2004 Report Share Posted January 10, 2004 have you got enuf sheep there frenchy Quote Link to comment Share on other sites More sharing options...
herefishiefishie Posted January 11, 2004 Author Report Share Posted January 11, 2004 havent seen 1 off them in years, Frenchy :roll: Quote Link to comment Share on other sites More sharing options...
herefishiefishie Posted January 13, 2004 Author Report Share Posted January 13, 2004 also, does anyone have theories on ph or temperature effecting sexes. eg; kribs,Pelvicachromis pulcher, acidic bath produces males & neutral water produces females. anyone breeding these???? Is this true???? Frenchy Quote Link to comment Share on other sites More sharing options...
Caryl Posted January 13, 2004 Report Share Posted January 13, 2004 I have heard about both these theories but don't know how accurate they are. I do know reptiles' sex is determined by temperature. Quote Link to comment Share on other sites More sharing options...
herefishiefishie Posted January 13, 2004 Author Report Share Posted January 13, 2004 the kribs was 1 that I have read on, its also known that most marine fish especially in the tropics are hermaphdoditise. Frenchy Quote Link to comment Share on other sites More sharing options...
suemack Posted January 13, 2004 Report Share Posted January 13, 2004 not sure about kribs frenchy have read that the pH does influence the ratio of males/females born. With a higher pH there is supposedly a higher ratio of females and lower e.g 6.5 you get relatively equal male/female offspring. Over the last 4 yrs I've had this with my guppies getting slightly more males than fems. I am on rainwater and have slightly acid pH. Have just got a pair of kribs so it'll be interesting if they breed to see what happens sue Quote Link to comment Share on other sites More sharing options...
herefishiefishie Posted January 15, 2004 Author Report Share Posted January 15, 2004 Sweet Sue, let us know how you go I have posted this on a cichlid site over here but the guys here are to far up each other to know what their fish are doing?? or to try theories.... The only reponse I got was the old "colour inhancing food" trick but I know better than that. there was 1 person(lfs owner)out of 893 members, he offered this site, www.cichlidae.com/articles/a091.html makes for good reading,especially the mbuna good on the kiwis!!!! :roll: Frenchy ps; the book I have just read; The Cichlid Fishes, Nature's grand experiment in evolution, by; George W. Barlow. Quote Link to comment Share on other sites More sharing options...
Kriber Posted January 23, 2004 Report Share Posted January 23, 2004 71% - what is plastic sex. Well? Quote Link to comment Share on other sites More sharing options...
catfish_dude Posted January 24, 2004 Report Share Posted January 24, 2004 77% now :lol: Quote Link to comment Share on other sites More sharing options...
Dark Posted February 5, 2004 Report Share Posted February 5, 2004 Giddens argues that 'plastic sex' predominates in modern times, he argues it as sex that has no reproductive function or objective. now of course you could be talking about the practice of making stop animations... i have heard that referred to as PS before. Quote Link to comment Share on other sites More sharing options...
herefishiefishie Posted February 15, 2004 Author Report Share Posted February 15, 2004 Yeah I have read a few different theories, Marine fish have been known for changing sexes for a while; eg; clown fish are all male, except for the largest, a female. so in finding nemo when his mum died, marlin should of then turned into a girl, :lol: & inturn look to mate with nemo :oops: with cichlids they are new species still been discovered, & most scientist alone study one field, either marine or freshwater; so most come accross plastic sexing by mistake, or dont know what happened.eg; Barlow though has studied both...anyway one of his stories... had a few orange chromides & the male died, he placed his 2 girls that were left in the same tank, no room :roll: both had mated with male. He noticed a while later eggs in the tank & then fry, not the normal size batch, but it showed 1 girl carried enough of the male bits & bobs Frenchy Quote Link to comment Share on other sites More sharing options...
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