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- W2017248863 abstract "The polychaete worm, Nereis (Neanthes) arenaceodentata (Moore), has historically been used to evaluate the acute lethality of sediments. More recently, a longer term (28-day) sediment bioassay has been proposed for this species in which the sublethal endpoint, growth, is also examined. However, interpretive guidance for the growth endpoint is lacking. To provide that guidance the quantitative relationship between diminutions in growth and subsequent reproduction was determined. Juvenile N. arenaceodentata were exposed to five geometrically decreasing food rations. Growth, as individual worm wet weight, was measured after 3, 6 and 9 wk. Worm growth increased significantly with increasing food ration. Eggs were first observed in the coelom of female worms at the 6-wk interval. Subsequent reproduction, measured as fecundity and number of juveniles produced, closely mirrored the reduced growth rates. No significant effect on either survival or reproduction was observed when somatic growth rate (measured between 0 to 6 wk) was ≥ 0.65 mg/day. Growth rates ≤0.45 mg/day resulted in significant reductions in reproduction. Low growth rates (0.05 mg/day) were associated with a nearly complete cessation of reproduction and very poor survival (5–11%). The importance of distinguishing somatic growth from gametic growth in chronic sublethal sediment bioassays with N. arenaceodentata is discussed." @default.
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- W2017248863 title "The relationship between growth and reproduction in the marine polychaete Nereis (Neanthes) arenaceodentata (Moore): Implications for chronic sublethal sediment bioassays" @default.
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- W2017248863 doi "https://doi.org/10.1016/0022-0981(93)90055-s" @default.
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