Lake and stream invasions of rusty crayfish, Orconectes rusticus, provide excellent opportunities to examine morphological variation in habitats differing in water velocity. Spread of O. rusticus and displacement of resident species in lakes has been attributed to larger mean body and chelae sizes than for native species, but larger body and chelae sizes may not be advantageous in high-velocity environments.
Apr 04, 2017. 1  Sir Ian McKellen has revealed why he never took on the role of Albus Dumbledore in the Harry Potter movies. 2  The 77-year-old English actor â known for playing Gandalf, another famous and bearded wizard from Lord of the Rings â said he was contacted by producers from Harry Potter to play Dumbledore, but turned down the part. His reason: Richard Harris, who played Dumbledore in the franchise before his death in 2002.
Helen Parr (Elastigirl, Mrs. Incredible) is 36 years old when the  events of the movie occur. She has three children: one daughter and  two sons. She is married to Bob Parrâ¦ (Mr. Incredible). 2 people found this useful.