Holland, L. E., 1987, Effect of brief navigation-related dewaterings on fish eggs
and larvae: North American Journal of Fisheries Management, v. 7, no. 1, p.
145-147.

Abstract: 

Short-term dewatering of nearshore spawning areas often occurs during passage of
commercial tows in the  upper Mississippi River as well as in other navigated
river systems. This phenomenon was examined  experimentally to identify
potential effects on survival of fish eggs and larvae. Early life stages of walleyes 
(Stizostedion vitreum vitreum ) and northern pike (Esox lucius ) were dewatered 2
min in laboratory studies at  intervals of either 1, 3, 6, or 12 h from just after
fertilization to 10-14 d posthatch. Dewatering did not cause  mortality of eggs, but
significant mortality of larvae of both species occurred at dewatering frequencies
of 1 or 3  h. Therefore, significant mortality first was observed at a frequency
equivalent to a mean passage of eight tows  per day.

Keywords: 

fish-eggs, fish-larvae, mortality, human-impact, Stizostedion-vitreum-vitreum,
Esox-lucius, dewatering, rivers, shipping, man-induced-effects, USA,
Mississippi-R., air-exposure