Student Research Projects
Potential Effects of Diet on Gizzard Shad Morphology
Dr. Maynard Schaus|
I am interested in doing a research project involving gizzard shad diet and morphology. I will be carefully dissecting out the intestinal tract, measuring its length and comparing it with fish diets. Typically across species, the more nutritious the food source the shorter the intestines. Intestines are usually longer for poorer quality diets to absorb as much of the nutrients as is possible from the food source. My research would test whether this is true for gizzard shad across systems where they are more zooplanktivorous (Lake Oneida, NY) compared to systems where they are more detritivorous (Acton Lake, OH) or have a mixed diet (Lakes Apopka, Dora, Newnans and Griffin, FL). In addition to measuring their intestinal tracts, I am also formulating a way to measure the angle at which their mouth is to compare it with diet. The trend in most benthic feeders usually have a mouth tilted to the bottom and planktivorous fish have a more upward pointing mouth. The hypothesis is that the gizzard shad that are primarily detritvorous would have a mouth that is tilted down.
2009 VFIC Summer Undergraduate Science Research Fellowship