Last year we had 5 fawns...4 does and 1 buck. So far this year, we have had 7 fawns...5 does and 2 bucks. We have used the same breeder buck both years. So my question is...is it the buck or is it bad luck?
What determines the sex of a fawn?
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I would assume it is just like humans......we the men determine the sex.......well our swimmers do.........it's all in which swimmers get to the egg first!!!!
Your pretty smart Dennis i learned that from the movie look who's talking . Were did you learn that from.
oh my buddy Virgil is back on........I learned it in my sex ed class.....see i did pay attention in school ....at least in that class!!!!
Hey Dennis , your sort of right . It's not always that fastest swimmer that gets to the egg first that gets the job done . Several sperm may enter the fallopian tube and reach the egg at the same time. It's the sperm with the strongest emzymes and can sort of eats it's way through the outer coating of the egg that fuses and makes the pregnancy and that's not always the first one there ! At least that's what I was thought and it's just my opinon I could be wrong .
Ok I will agree but in a sense it is still the first one.......I guess it should be worded the first one IN rather than the first one there
I thought maybe it was the lenght of the buck's unit...giving the slower boy swimmers a fighting chance. Could you tell that by the size of the bucks feet?
Why do people have to make a competition out of everything, the only way to increase odds is to spin the semen in a larger amount in a centrefuge and remove the semen from a certain level ( can't remember top,bottom or middle) this will greatly increase the ratio of one sex over another. I don't want to here about someone who is live beeding and spinning their buck!
The question was,What determines the sex of a fawn. Don`t know but if I lift the tail I can tell ya what it is. If I have my glasses on.
If I have my glasses on. Forget the picture of the buck's feet. I want to see the picture of an okie or pollock spinning a livebreeder.
Seriously though, I have never heard of the spinning the semen on a cetrafuge to increase odds of specific sex. I would be curious to hear more of that science. Or just more crazy ideas of sex determination factors!
I have to agree with Mitch. What determines the sex is the eyes or hands of the one checking.
I heard a theory once that the more stress the does experience prior to conception the better the chances for buck fawns. Just a theory that doesn't have much scientific backing but it was hard to dismiss when the guy telling me had 75% buck ratio two years running!
Seriously though, I have never heard of the spinning the semen on a cetrafuge to increase odds of specific sex. I would be curious to hear more of that science. Or just more crazy ideas of sex determination factors!
I have to agree with Mitch. What determines the sex is the eyes or hands of the one checking.
I heard a theory once that the more stress the does experience prior to conception the better the chances for buck fawns. Just a theory that doesn't have much scientific backing but it was hard to dismiss when the guy telling me had 75% buck ratio two years running!
Joined Apr 2009
624 Posts | 0+
Clinton, PA
My fiance's family have a big dairy farm and AI everyone of their cows. I have talked to her mom to just get the whole process figured out, (but see is a little shy when you start to talk about her breeding cows.) But she has told me that there is actually sexed semen that you can buy for cows where in her case she would want all heifers for future milking stock, where a beef farmer would want all bulls. That would be something to see if the deer semen could head in the same direction.
Joined Apr 2009
2,617 Posts | 0+
Edgar, WI
OK, I ask a simple question since my breeder buck the last two years is spitting out 75% doe fawns and I am wondering if he is going to keep doing that or if maybe the odds will be changing. If not I think my breeder will transform into a shooter! And then Curtis wants to turn this into a unit contest!!! Please..... only pictures of feet.
And then Curtis wants to turn this into a unit contest!!! Please..... only pictures of feet.
Joined Apr 2009
519 Posts | 1+
Rivesville, WV
I have wandered this myself. My wife tells me I am CRAZY, but I still don't think just the male decides the sex of the fawn. I have a 7 year old doe from J-44 genetics. She bred as an 8 month old fawn, and gave us a single buck fawn. In the past 6 years, she has given us twins every year. We have bred her with three different bucks during those 6 years. Of those 12 fawns, only 1 has been a buck. Odds are that it would be 50% bucks...but only 8% being bucks is really hard for me to understand.
Coincidentally, this doe comes from a doe that in 6 years of breeding, with 2 different bucks, only ever gave 2 doe fawns out of 12 total fawns. They were twin does from her first breeding. (Whick I kept the one that we are discussing) She then gave us twin bucks 5 years in a row. The thing that makes this even stranger, is that two years in a row, both mother and daughter were bred to the same buck. Both does gave the normal fawns, twin bucks from the mother and twin does from the daughter.
I am not totally convinced that the father is the only deciding factor on the sex of the fawns.
My one explananation is that some does may contain a chemical in their uterus that is counterproductive to certain sperm cells. Working almost like a spermicide, but chemically deactivating either male or female sperm cells and allowing the other to remain to reach reproduction. If this can be possible, this removes the fact that the father chooses the sex of the fawn. It is the sperm that does decide, but the doe does have an influence.
Does anyone out here have enough scientific backing to confirm or deny my theory?
Coincidentally, this doe comes from a doe that in 6 years of breeding, with 2 different bucks, only ever gave 2 doe fawns out of 12 total fawns. They were twin does from her first breeding. (Whick I kept the one that we are discussing) She then gave us twin bucks 5 years in a row. The thing that makes this even stranger, is that two years in a row, both mother and daughter were bred to the same buck. Both does gave the normal fawns, twin bucks from the mother and twin does from the daughter.
I am not totally convinced that the father is the only deciding factor on the sex of the fawns.
My one explananation is that some does may contain a chemical in their uterus that is counterproductive to certain sperm cells. Working almost like a spermicide, but chemically deactivating either male or female sperm cells and allowing the other to remain to reach reproduction. If this can be possible, this removes the fact that the father chooses the sex of the fawn. It is the sperm that does decide, but the doe does have an influence.
Does anyone out here have enough scientific backing to confirm or deny my theory?
Deerman your very correct ! There are certain females within all mammal animals as well as humans that do not except either Y or X sperms. Not sure why but I know there are . Man I would have thought you AI experts would have jumped all over this thread. When they sex sperm they do it using somesort of dye that sticks to the chromesome makeup of each individual sperm . The X sperm contains more chromesome make up of which the dye sticks to than the Y sperms and thats how they seperate the X and Y sperm when they make sexed semen for sale . The sexed semen in the cattle industry comes in red 1/4 cc straws. The big draw back is in conception, it's like 20 to 40 percent lower in cattle than when using regular unsexed semen . So Ya I think we should head in that direction then we can drop our conseption down to about 55 percent or so and pay more for the sexing proccess to boot ! . Just kidding .That wouldn't be to good now would it ? Now if we'd use sexed semen and we're trying to make a buck and our doe just happens to be one of those mammals that really only excepts or settles to make females our concetion is pretty much zero to 15 percent at best !! I've been through the zero conception and that's not good !! I think even using sexed semen it's about 85 percent accurate in getting the sex your wanting and breeding for ! Just a thought and I could be way wrong ....
Female DNA has 2 copies of the X chromosome so all female gametes (eggs) have only X chromosomes. Males have one copy of the X chromosome and one copy of the Y chromosome so their gametes (sperm) will either have an X chromosome or a Y chromosome in a ratio of 1:1. When the sperm mixes with the egg you either get offspring that have 2 X chromosomes (a female) or 1 X and 1 Y chromosome (a male). This is why they say the male 'decides' the sex, whatever chromosome the sperm is carrying determines what sex the offspring is. Under normal circumstances the chance of conceiving a male vs a female is 50/50, keep in mind this is for each mating. Every time an animal breeds the chance of having a female is 50%, it doesn't matter if the mother has given birth to 10 females in a row the probability is still 50% for each mating.
As far as I know the sperm attempting to fertilize the egg have an identical chance. I have never heard of any kind of sex selection in Cervids though it does occur in other species, most notably reptiles. I did a quick online search and couldn't find any data to support the theory that Cervids have any control over the sex of their offspring.
That being said it is possible to perform sex selection on the sperm cells before insemination by either centrifugation or flow cytometry though I don't know if anyone is doing this in deer. Hope this helps
As far as I know the sperm attempting to fertilize the egg have an identical chance. I have never heard of any kind of sex selection in Cervids though it does occur in other species, most notably reptiles. I did a quick online search and couldn't find any data to support the theory that Cervids have any control over the sex of their offspring.
That being said it is possible to perform sex selection on the sperm cells before insemination by either centrifugation or flow cytometry though I don't know if anyone is doing this in deer. Hope this helps