Effect of different diets on fecundity, development time and body size of freshwater copepod Eucyclops serrulatus

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Abstract

The effect of five different diets consisting of green algae Scenedesmus quadricauda,
cereal plant meal (wheat+white+canola+barley), fish food meal, mixed manure powder
(chicken manure+cattle manure), and baker's yeast (Saccharomyces cerevisiae) were
investigated on fecundity rate, larval development time and body length in freshwater
copepod Eucyclops serrulatus. A complete randomized design was employed using an
individual gravid female in 50ml vials at 26ºC water temperature. The maximum fecundity
was obtained in copepods fed on fish diet (18.6±1.08, eggs /female mean±SD) followed in
order by baker's yeast (17.3±3.19), cereal plant meal (13±2.45), Scenedesmus (9.3±0.41), and
mixed manure powder (8.6±0.82). The larval developmental time of copepod E. serrulatus
was significantly different in copepods fed on examined diets. The mean shortest naupliar
time (8.3±0.81 days) and copepodit time (1.0±0.70 days) were observed in copepods fed on
fish food meal with a significant difference compared to other examined treatments. In
addition, length and width of naupliar, copepodit, and adult of copepod E. serrulatus
increased when copepods fed on fish diet and baker's yeast.

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Iranian Scientific Fisheries Journal
Volume 23, Issue 1 - Serial Number 86
January and February 2015
Pages 51-62

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