Growth of painted turtles, Chrysemys picta, in Manitoba and Louisiana.

Abstract

Juvenile growth rates of western painted turtles Chrysemys picta bellii in Manitoba are very similar to those of southern painted turtles, C.p. dorsalis in Louisiana. Growth patterns differ between these populations primarily as a function of differences in size at maturity. Male growth rates are sharply reduced at maturity in both populations. Manitoba males show a protracted period of slow growth after maturity, and approach the female in maximum size. Louisiana males stop growing shortly after maturity, and never approach the size of mature females. Non-growing adults in both populations consume increased quantities of plant material. -Author