Seasonal Composition and Abundance of Ichthyoplankton Entrained through Big Bend Dam, South Dakota

Abstract

Age-0 fishes were sampled in the tailrace of Big Bend Dam, Missouri River, from June 2 to September 30, 1999. Overall, 6,302 fish representing 1 l species were collected, although gizzard shad (Dorosoma cepedianum; 76%) and freshwater drum (Aplodotinus grunniens; 22.6%) composed the majority of the catch. Mean abundances (number of fish/1,000 m3 i SE) of entrained age-0 freshwater drum and gizzard shad were 15.2 i 12 and 42.8 i 6.8, respectively. Typically, freshwater drum catches were highest at night and gizzard shad catches were highest during the day. Cumulative losses (number of fish * 95%

Lateral Exchange of Larval Fish between a Restored Backwater and a Large River in the East‐Central USA

“…These photokinetic responses may change in some species as larvae age (Bulkowski and Meade 1983), possibly a result of ontogenetic diet changes or predation susceptibility. However, diel patterns in drift can be contradictory; that is, fish species of the same life stage have exhibited significant nocturnal drift in some water bodies and diurnal drift in others (Muth and Schmulbach 1984;Smith and Brown 2002).…”

The impacts of reduced water temperature on gizzard shad production in two Missouri River Reservoirs during a historic flood

“…Entrainment through Big Bend Dam may be responsible for this occurrence. Unlike Oahe Dam, which draws water from the hypolimnion, Big Bend Dam draws water from the epilimnion, and entrainment of large numbers of gizzard shad (447 × 10 6 gizzard shad from 2 June-30 September, 1999) has been documented previously (Smith & Brown, 2002). Michaletz (1997a) found rising water levels and temperature were the main factors influencing gizzard shad recruitment and cohort dynamics, and this appears to be the case during a historic flood in these two Missouri River impoundments.…”

“…Entrainment through Big Bend Dam may be responsible for this occurrence. Unlike Oahe Dam, which draws water from the hypolimnion, Big Bend Dam draws water from the epilimnion, and entrainment of large numbers of gizzard shad (447 × 10 6 gizzard shad from 2 June–30 September, 1999) has been documented previously (Smith & Brown, ).…”

Entrainment of Rainbow Smelt through Oahe Dam during the 2011 Missouri River Flood

“…Bauml (1996) examined larval entrainment from Squaw Creek Reservoir, Texas, and found the most common genus to be Lepomis, though entrainment of five different genera was documented. Smith and Brown (2002) examined entrainment from Big Bend Dam, immediately downstream of Oahe Dam, and found Gizzard Shad had the highest entrainment through the summer months. In this study, we found high Rainbow Smelt entrainment through Oahe Dam; however, anecdotal evidence suggests entrainment is prevalent for many species.…”