Richard J. Neves
Utilization of Alewives and Gizzard Shad by Striped Bass in Smith Mountain Lake, Virginia
Alewives (Alosa pseudoharengus) and gizzard shad (Dorosoma cepedianum) were the principal prey items in the stomachs of 708 striped bass (Morone saxatilis) collected in Smith Mountain Lake, Virginia, from April to December 1983 and 1984. Alewives comprised 51% and 39% of ingested prey items by number and weight, respectively; comparable values for gizzard shad were 38% and 58%. Stomach contents differed significantly between habitats (upper and lower reservoir) and among seasons. Regression analyses between size of consumed clupeids and total length of striped bass indicated a greater...
Reproductive Cycle and Associated Changes in Energy Content of Body Tissues in Rainbow Trout from the South Fork Holston River, Virginia
The spawning period and caloric density of body tissues during gonadal recrudescence were studied in a naturalized population of rainbow trout (Salmo gairdneri) from September 1979 to August 1980. As judged by gonosomatic indices and the percentage of spent females in semimonthly samples, the fish spawned from mid-February to early April, when water temperature and stream flow were both increasing. Decreases in calorific equivalents (cal mg-1 dry weight) of selected tissues during gonadal maturation in fall and winter were greatest in fat reserves along the alimentary tract.
