I’ve heard of some rat Hamburg Walmart using a little bit of oil to try and push the penis back inside if found early. If it has been a few days, then antibiotic ointment used several times a day over a couple days found that would usually get the penis to Rat Penis. One vet used hemorrhoid Rat Penis to shrink a prolapsed penis ….
Home : Rat Biology : Why are rat testicles so big? Why are rat testicles so big? The first sight of a male rat can be a shock to the uninitiated. Those testicles, giant pillow-like things hanging behind the rump, seem to take up one’s entire field of vision. Rat testicles — also known as torpedoes and goolies — give rise to a lot of humor and embarrasssment. So, why are rat testicles so large? A species’ sexual anatomy is related to its mating system — who mates with whom.
In species in which many males mate with one female when she is in heat, sperm from all these males is deposited in the female’s reproductive tract in a short span of time. This is called sperm competition theory, because sperm from different males duke it out inside the female’s reproductive tract.
Rats have just such a mating system in which multiple males mate with one female, especially at higher population densities. When a female rat comes into heat, she may be mated by multiple males in a short span of time. In contrast, species in which just one male mates with a female during her estrus don’t have sperm competition, because the sperm racing to fertilize the female’s eggs belong to a single male.
There is no need to produce a lot of sperm, so males of such species can afford to have small testicles. This relationship between testicle size and sperm competition holds true across the animal kingdom, and has been found in mammals primates, sheep, rodents etc. In fact, testicle size is considered an excellent predictor of a species’ mating system. Species in which multiple males mate with a female in a short span of time encounter sperm competition and have large testicles relative to their body size.
Species in which just one male mates with a female encounter no sperm competition and have relatively small testicles. What about the testicles of humans and our close relatives, the gorilla and the chimpanzee? Gorillas are large pound animals, but their testicles are tiny, a little over 1 oz together. Gorillas live in small groups in which one male mates with multiple females — no sperm competition, hence the small testicles.
Chimpanzees are much smaller animals, tipping the scales at pounds, but they have large testicles weighing about 4 ounces together. Not surprisingly, chimpanzees live in groups with multiple males and females, and when a female comes into heat she may mate with several males in one day. This means lots of sperm competition, hence the large testicles.
Humans fall between gorillas and chimpanzees, with a body size around pounds, and testicles that weigh about 1. Human testicles are neither especially large nor especially small. This indicates that humans have a mating system that was neither as promiscuous as that of the chimpanzee, nor as exclusive as that of the gorilla.
Therefore, sperm competition probably played a small role in the evolution of our sexual anatomy and behavior. References and a little further reading about testicle size and sperm competition: Online resources:.
I’ve heard of some rat breeders using a little bit of oil to try and push the penis back inside if found early. If it has been a few days, then antibiotic ointment used several times a day over a couple days found that would usually get the penis to retract. One vet used hemorrhoid cream to shrink a prolapsed penis …
Hi, guys, I’m hoping you can help me with a problem I’ve been having with the newest boy. I’ve had him for about 3 months and he has gotten 2 very large penis plugs in that time. The rat, Jenkin, cleans himself often. Everytime he does I watch him to check if he has a plug and I never see one…
Penis Plugs One of the joys of being a rat owner, particularly the owner of a male rat, is that if you get to experience "old age" you will also likely get to It’s not a bad thing, per se, but it is weird. Because they keep them inside, if their grooming habits start to decline (they’re …
Swelling and balanitis (inflammation of glans penis) may also be present. Band of retracted skin behind the head of penis, may also be swollen and tight. Rat frantically licks the penis. Rat showing signs of sensitivity and pain when the area is examined or touched.
The first sight of a male rat can be a shock to the uninitiated. Those testicles, giant pillow-like things hanging behind the rump, seem to take up one’s entire field of vision. Rat testicles — also known as torpedoes and goolies — give rise to a lot of humor and embarrasssment. So, why are rat testicles …
Male rats have an os penis also termed the baculum. The os penis is a single cartilaginous structure (penile bone) that supplies the rigidity for copulation. The word baculum means “stick” or “staff” in Latin. The penis is sheathed by the prepuce.
The spontaneous formation of vesical proteinaceous plugs, otherwise commonly referred to as penile or penis plug, is frequently seen in the aging male rat. The plugs have been known to attain a large enough size to occlude the lumen of the bladder. They can be seen as firm white creamy colored material often protruding at the tip of the penis.