Photoreceptors and visual pigments in the red-eared turtle, Trachemys scripta elegans.

نویسندگان

  • E R Loew
  • V I Govardovskii
چکیده

Absorbance spectra of cone outer segments and oil droplets were recorded microspectrophotometrically in the retina of the red-eared turtle, Trachemys scripta elegans. There are four cone visual pigments, with lambda(max) = 617 nm (red sensitive), 515 nm (green sensitive), 458 nm (blue sensitive), and 372 nm (UV-sensitive). The red-sensitive pigment resides in single cones with red or orange oil droplets, and in both members of double cones. The principal member of the double cone contains an orange oil droplet, and the accessory member is droplet free. The green-sensitive pigment is situated in single cones with orange/dark yellow droplets. The blue-sensitive pigment is combined with the UV-absorbing oil droplet in single cones. The UV-sensitive pigment resides in single cones with clear oil droplets that exhibited virtually no absorbance down to 325 nm. Thus, seven types of cones can be identified based on their morphology, oil droplet color, and the visual pigment absorbance. At the moment, this is the most complex cone system described for vertebrates.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Restore to good health in baby turtle, Trachemys scripta elegans with chronic anorexia and blind eyes

As the first case, a baby red eared slider turtle, Trachemys scripta elegans, 1.77 inches long, with a 4 month history of anorexia and blind eyes was referred to the Aquatic Animal Clinic, School of Veterinary Medicine, Shiraz University, Iran. The eyes of the pet were swollen and he was not active in swimming and feeling around. In the clinic, after stress treatment, he was kept in a clean aqu...

متن کامل

Distribution and Abundance of Invasive Red-Eared Sliders (Trachemys scripta elegans) in California's Sacramento River Basin and Possible Impacts on Native Western Pond Turtles (Emys marmorata)

– We present baseline data on the distribution and abundance of invasive red-eared slider turtles (Trachemys scripta elegans) in the Sacramento River NOTES AND FIELD REPORTS 297

متن کامل

Examinations of the Ember of Invasive Species Problems: Trade Turnover of Cumberland Sliders Trachemys Scripta Troostii in the Pet Shops of Eastern Poland

In Poland, just like in many other countries, selling Red-eared terrapins Trachemys scripta elegans as invasive has been prohibited, but there are other subspecies of Trachemys scripta on the pet market, constituting a threat to the native Pond turtle Emys orbicularis. I provide data on the structure of local trade in turtles in eastern Poland and the factors driving it after the introduction o...

متن کامل

A Systems Level Analysis of Temperature - Dependent Sex Determination in the Red - Eared

A Systems Level Analysis of Temperature-Dependent Sex Determination in the Red-Eared Slider Turtle Trachemys Scripta Elegans

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Visual neuroscience

دوره 18 5  شماره 

صفحات  -

تاریخ انتشار 2001