Telescope Shiner Brain

Above is a dorsal view of the brain of a male telescope shiner we collected in June, 2007, at Hurricane Creek at the Walls of Jericho. This brain is 6.3 mm long. The telencephalon, or forebrain, is at the top of photo. The optic tectums are the two large lobes on the side behind that, the cerebellum is tucked in behind the optic tectums, and the dorsal medulla (an extension of the spinal cord) runs out of that into the shadow at the bottom of the photo. We have top, bottom and side photos of each brain so that we can calculate total brain volume, and the volumes of the telecephalon, optic tectums and cerebellum. We have 20 fish from June photographed, and on Wednesday Brittany, James and Alexandria will weigh these brains. And then they're on to do May, and maybe April, fish from the peak spawning time of telescope shiners. Do males have bigger brains than females, as is true of scarlet shiners? I hope to know soon.