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A series of laboratory experiments were conducted to better understand the behavior of grass carp eggs and larvae in moving water in order to develop and implement new strategies for control and prediction of their dispersal and drift at early life stages. Settling velocity and density of a representative sample of eggs were estimated, and three trials of flume experiments with different flow conditions were conducted with live eggs in a temperature-controlled setting with a mobile sediment bed. In these trials, egg and larval stages were continuously analyzed over periods of 80 hours; and eggs and larvae interactions with the flow and sediment bed were monitored and characterized qualitatively and quantitatively....
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This dataset documents the number of normally developed hatched free embryos, abnormally developed hatched free embryos, and viable unhatched embryos from two laboratory trials (shovelnose sturgeon during April and pallid sturgeon during May 2016) in substrate conditions designed to simulate potential fates within a dynamic riverine environment. Trials were performed with substrate treatments that consisted of clean glass (control), gravel, medium-coarse sand, and fine sand-silt. Medium-coarse sand and fine sand-silt substrates were each tested three ways: unburied, partially buried, and fully buried (1–2 millimeter depth). Pallid sturgeon and shovelnose sturgeon embryos were exposed to trial conditions from the...
Sodium content of utricles, utricle bracts, testa, and embryo was determined for Sarcobatus vermiculatus. Immediately after germination, seedlins were grown in H2O, 330 mM NaCl, or 225 mM Na2SO4 solutions, and Na+ content was determined. Sodium content of utricles averaged 38 900 [mu]g[middle dot]g-1, with highest concentrations in bracts (53 100 [mu]g[middle dot]g-1), and lowest concentrations (1843 [mu]g[middle dot]g-1) in embryos. Sodium concentration of washed embryos averaged 954 [mu]g[middle dot]g-1. Seedlings germinated from debracted utricles and grown 24 h in distilled H2O contained 2965 [mu]g[middle dot]g-1 Na+. The Na+ content of seedlings germinated and grown 24 h in NaCl or Na2SO4 solutions averaged...
    map background search result map search result map Survival and drifting patterns of grass carp eggs and larvae in response to interactions with flow and sediment in a laboratory flume Observations of survival and hatch of developing pallid sturgeon embryos in relation to experimental substrate and sediment cover Observations of survival and hatch of developing pallid sturgeon embryos in relation to experimental substrate and sediment cover Survival and drifting patterns of grass carp eggs and larvae in response to interactions with flow and sediment in a laboratory flume