Reproductive biology and age and growth of the Missouri saddled darter Etheostoma tetrazonum.
Females typically contained maturing clutches of 40-50 ova and spawned periodically from mid-March to July. Reproductive activity was interrupted in late April when heavy rains produced high stream flows. Darters in the smaller Pomme de Terre River were larger at a given age and in better condition than those in the Niangua River. Maximum longevity for both sexes was 4 yr with sexual maturity attained at 1 yr in females and after 2 yr in males. Length of the spawning period and production of many small clutches of eggs enhance reproductive success in an unpredictable fluctuating riffle habitat.-from Authors
Taber, Charles A., and Barbara A. Taber. "Reproductive biology and age and growth of the Missouri saddled darter Etheostoma tetrazonum." American Midland Naturalist 109, no. 2 (1983): 222-229.
American Midland Naturalist