Home > Categories > Recreation and Sports > Animals and Pets > View Advice  


Query from: Ammas Support, New Zealand, 04/14/05
Topic: ANIMALS AND PETS      Submitted on: Ask Agent
how can you tell the sex of a red eared turtle?

Rate = 3.5 (Rated by 10 Council Members)
[ This query closed ]
random/tn_yellow.jpg
Response from: Badshah ,   
Council Member on Ammas.com
Dear Ammas Support, http://www.ourstolenfuture.org/NewS… In the red-eared slider turtle—like many turtles the sex of a growing embryo is by the temperature at which it is incubated. Cooler temperatures cause an embryo to grow up as a male. For example, if eggs are incubated at 26.6°C, all eggs will be male. In contrast, if a clutch is incubated at 31°C, all eggs will be female. A 1:1 ratio is found at about 29.2°C.

This effect is seen, it is thought, because higher temperatures speed the conversion of testosterone to estradiol. Embryos incubated at a warmer temperature are thus exposed to more estradiol during the critical period for sex determination, and they become female.

It has also been found that certain synthetic estrogens can override the temperature effect. For example, administering certain PCBs to eggs incubated at all-male or male-biased temperatures produces more females than expected on the basis of temperature alone.

Rate = 3 (Rated by 6 Council Members)

Thank this advisor   
 
Response from: Gaz ,   
Council Member on Ammas.com
This is all I could find

http://petplace.netscape.com/articl…

Having seen programmes on turtles it is not easy appart from external signs to tell the sex without an ultrasound. But if you only have one of them it is not a major issue.

Rate = 2.5 (Rated by 6 Council Members)

Thank this advisor   
 
Response from: Ailaan Shere,  
Registered Member on Ammas.com
Hi there,

Males have long front toenails and their tails are much longer and thicker than that of the female, with the anal opening beyond the rear edge of the carapace. The female's tail is smaller, with the anal opening usually at or under the rear edge of the carapace.

Best wishes.

Rate = 3 (Rated by 7 Council Members)

Thank this advisor   
 
Response from: Natasha Pal,   
Featured Member on Ammas.com
Dear Ammas Support,

according to http://www.wetwebmedia.com/FWSubWeb… you can determine the sex of a red eared turtle in the following way:

As they get larger males will develop very long "fingernails" on the front feet, while the females will remain short, the same as on the rear feet. The males "court" underwater by placing their feet in front of their face and waving these long front claws. Another method is by "probing" to locate the hemipenises (they have two each), but this again ought to be done when they are larger and by a professional, as it entails risk of serious injury if done incorrectly.

Hope this helps.

Rate = 3.5 (Rated by 7 Council Members)

Thank this advisor   
 
Response from: Aruna ,   
Featured Member on Ammas.com
http://encarta.msn.com/text_7615670… For reasons not well understood, for most turtle species, the temperature of the egg about midway through incubation determines the sex of the hatchling. For example, red-eared slider turtle eggs kept below 28° C (about 82° F) will produce nearly all male hatchlings; if kept above 30° C (86° F), they hatch into females. At 29° C (about 84° F), both sexes may result. In the American soft-shelled turtles and a few other species, temperature has no effect on a hatchling's sex. In these species, hereditary units called chromosomes may determine sex, as is the case with birds and mammals.

http://www.ourstolenfuture.org/NewS… In the red-eared slider turtle—like many turtles, alligators and crocodiles, and some lizards—the sex of a growing embryo is by the temperature at which it is incubated. Cooler temperatures cause an embryo to grow up as a male. For example, if eggs are incubated at 26.6°C, all eggs will be male. In contrast, if a clutch is incubated at 31°C, all eggs will be female. A 1:1 ratio is found at about 29.2°C.

This effect is seen, it is thought, because higher temperatures speed the conversion of testosterone to estradiol. Embryos incubated at a warmer temperature are thus exposed to more estradiol during the critical period for sex determination, and they become female.

It has also been found that certain synthetic estrogens can override the temperature effect. For example, administering certain PCBs to eggs incubated at all-male or male-biased temperatures produces more females than expected on the basis of temperature alone.

Rate = 3.5 (Rated by 3 Council Members)

Thank this advisor   
 
Response from: Kamala Swaminathan,   
Council Member on Ammas.com
Hi,

We have received the same enquiry sometime back, and all the answers are available in the following site: http://askagent.ammas.com/topics/An… I reproduce below one of the answers for your ready reference:

Males have long front toenails and their tails are much longer and thicker than that of the female, with the anal opening beyond the rear edge of the carapace. The female's tail is smaller, with the anal opening usually at or under the rear edge of the carapace.

Rate = 3.5 (Rated by 3 Council Members)

Thank this advisor   
 
Response from: sarathy gopal,   
Featured Member on Ammas.com
Q. Sex determination of a red eared turtle. Ans.Sex in a red eared turtle is determined at embryo stage the temperature of incubation. eg,At 26.6.degree centigrade. all male. 31.00 ' ' all female. 29.2. ' ' 1:1.ratio Sex determination can also be influenced by hormones. Reference.Crews.1996.Temp,development,sex determination...Zoological science.13:1-1 sarathy

Rate = 2.5 (Rated by 3 Council Members)

Thank this advisor   
 
Response from: Sri(Pri) ,   
Council Member on Ammas.com
http://www.allturtles.com/articles/… Red Ear Sliders - Alias: "The Dime Store Turtle"

The Red Eared Slider. Alias: the "Dime Store Turtle." Used to be sold in the nickel and dime store many years ago. Illegal now to be sold under 4 inches in length. They are one of the most recognizable turtles. Description: A medium sized turtle, usually 4 to 6 inches as average. Abundantly green; or different shades of green, with yellow stripes and red markings on the sides of their face. The red markings appear to be around the ear area, hence given the name Red Ear Slider.

Natively the red ear sliders can be found in the United States from the Mississippi Valley of Illinois down to the Gulf of Mexico. They have been known to appear in regions outside of this. It's suggested that these turtles have been released in the wild due to lack of interest from their previous owners.

Red ear sliders are found in freshwater. They prefer the shallower, quiet, and slow moving waters found in lakes, rivers, ponds, streams and marshes. As youngsters, they enjoy chasing small fish and tadpoles that hang out in the shallow end too. Since the adults get too big to swim around in the shallow end, they enjoy swimming in the deeper, shallow parts. There they find more vegetation to munch on. They still enjoy a small fish every now and then that may swim their way.

During the early afternoon to late afternoons, you can observe these beautiful red ear sliders basking in the sun. They are found on logs, rocks and shorelines. Sometimes they are stacked 2 or even 3 turtles high! My red ear sliders at home are caught doing this once in awhile. They are so cute when they first start to bask. They stretch their little legs out as far as they can to expose as much skin to the sun.

As apart of the ecosystem, the turtles eat other animals as others eat them. I know its sad, but it's a part of life. Of course they say man is their greatest predator because some are shot while basking, crushed by cars, sacrifices for research and beheaded after being hooked by fisherman. Pet turtles die from neglect or improper care. Other animal predators include crows, raccoons, pike fish, bass fish, frogs, snakes, other larger turtles, herons, and skunks. Even the smallest creatures feed upon these precious turtles. Ants, maggots and molds attack their eggs.

We've enjoyed raising our pet red ear sliders from just over the size of a quarter to what they are today. With the help of reading and research from other reptile owners, my turtles are sure to live a long, healthy and happy life.

http://www.columbia.edu/itc/cerc/da… Common Name: Red-Eared Slider Turtle Scientific Name: Trachemys scripta elegans

Classification:

Phylum or Division: Chordata Class: Sarcopterygii Order: Testudines Family: Emydidae Subfamily: Emydinae

Identification: The red-eared slider, a subspecies of the pond slider, is an aquatic turtle with a fairly flat, oval shell and a weakly keeled carapace. Colors range from bright greens and yellows in juveniles to more muted olives, browns, and even blacks in the more melenistic members. Two good field markers are the red stripe behind the eye for which the subspecies was named, and the pale yellow plastron with dark smudges on the scutes. Adult females can range up to 11 inches in shell length, with adult males rather smaller. Can be seen basking on logs and rocks on warm, sunny days, where they will pile on top of each other, then slide off at any sign of danger. They inhabit sluggish rivers, ponds, and lakes with soft bottoms and dense vegetation. Most people will recognize these as the "dime store turtle".

Original Distribution: Mississippi valley north to Illinois and south to the Gulf; Tennessee and Cumberland river valleys from southeast Kentucky and southwest Virginia to northeast Alabama.

Rate = 3 (Rated by 2 Council Members)

Thank this advisor   
 
Response from: ,   
Featured Member on Ammas.com
Reptiles keep their genitalia internal, except when mating. For red-eared sliders, maturity is reached at 5 years. Males have MUCH longer claws than females(for grabbing during mating) and have a concave indentation on the undershell. Females don't have the indentation.

Rate = 2.5 (Rated by 4 Council Members)

Thank this advisor   
 
Response from: Vivek Agarwal,  
Registered Member on Ammas.com
this is solely depend over the temperature, low temperature results in the male turtle while higher temperature cause femaleness. it is due to the conversion of testesterone in to the estradiole with higher temperature effect.

Rate = 2.5 (Rated by 4 Council Members)

 
Response from: Raghavan K ,  
Registered Member on Ammas.com
Determination of a red eared turtle in not that so easy without the proper examination. However in general females turtle has less sized toenails compared that of males. Surveys identified that egg hatched between 25 to 30 degree Celcuis are happen to be a Male turtle and anything more than 30 degree celcuis are of females.

Rate = 2.5 (Rated by 4 Council Members)

 
Response from: Shella Grover,   
Registered Member on Ammas.com
The tail is going to be long & thick for a male turtle. Wait a little till they grow a little big

Rate = 1.5 (Rated by 4 Council Members)

 
 
 
 
More Animals and Pets Advice