my LFS has very good quality guppies each variety in their tank with females and males and the females are like 2.29 and males like $3.50 and a pair for $5,i must be lucky!
Why can't you buy guppy females at petland?
- Thread starter SamNYC
- Start date
I disagree with this, 20 fry, 2 or 3 males and the rest being female in my tank, so theres nothing equal produced in my tank. A few more weeks and i can get them traded in for store credit... I need the space as i have around 3 more litters born since then. Will have to see what the ratio of male and female i got from those lots.
This is unusual. On average, guppies produce equal numbers of males and females. You do know that they're all born looking female and only develop gonopodia and colourful finnage as they approach adulthood? If they're still small, many of these "females" will turn out to be males.I disagree with this, 20 fry, 2 or 3 males and the rest being female in my tank, so theres nothing equal produced in my tank. A few more weeks and i can get them traded in for store credit... I need the space as i have around 3 more litters born since then. Will have to see what the ratio of male and female i got from those lots.
They are now over 4 months old and look male/female now. I know that as very young fish they all look the same. I also know that my males now look like males. And The females are larger and female looking now. Im waiting now to see what i get out of my next litter as it starts to grow up. But i definately have many more females than males out of that last litter.
Where is your source for stating that this is unusual? For reference sake would be interesting to know
Disparity in numbers of males and females is relatively rare, although it does happen in some species, but I've never seen it documented in guppies. My own experience is that males and females are produced in equal numbers, and that's over decades of having the aquatic rabbits breed from time to time. You do end up with more females over time because they appear to be longer lived than the males, but generally the numbers are roughly equal.
The only thing i have seen on the net regarding numbers of specific males or females is the temp setting in the tank, which, from a Google search, there is quite a lot of info on this....however, i have found nothing which says they are of equal numbers when the fry come.....
Actually, there is: http://www.ingentaconnect.com/content/bsc/ares/2006/00000037/00000002/art00005
Note: The sex ratios of the progenies from survived gravid females were not differed from a balanced sex ratio (P>0.05).
In other words, sex ratios are roughly 50:50.
The proportion of females increased gradually with decreasing temperature and the proportion of males increased gradually with increasing temperatures rather than having a threshold response in heat-treated fry. However, mortality of heat-treated fry was high; it is most likely that our results were biased by sex-dependent mortality, which were also revealed by corrected sex ratios of the treatment groups and progeny testing of some individuals. These results suggest that a major gene linked to X-chromosome could be responsible for resistance and sensitivity to both high and low temperature.
In other words, female fry survive low temperatures better than males, but males survive high temperatures slightly better than females.
Note: The sex ratios of the progenies from survived gravid females were not differed from a balanced sex ratio (P>0.05).
In other words, sex ratios are roughly 50:50.
The proportion of females increased gradually with decreasing temperature and the proportion of males increased gradually with increasing temperatures rather than having a threshold response in heat-treated fry. However, mortality of heat-treated fry was high; it is most likely that our results were biased by sex-dependent mortality, which were also revealed by corrected sex ratios of the treatment groups and progeny testing of some individuals. These results suggest that a major gene linked to X-chromosome could be responsible for resistance and sensitivity to both high and low temperature.
In other words, female fry survive low temperatures better than males, but males survive high temperatures slightly better than females.
