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Sci-Afric Journal of Scientific Issues, Research and Essays (SJSIRS)

Sci-Afric Journal of Scientific Issues, Research and Essays Vol.2(4) Pp. 173-179 April 2014 Copyright 2014 Sci-Afric Publishers.

 

Effect of Different Feeding Regimes on the Performance of Daphnia longispina.
 

*1Mona MH, 1El-Gamal MM, 2Abdel Razek FA, 1Elgiar EA, 1Nour Eldeen MF.
 

1. Zoology Department, Faculty of Science, Tanta University, Egypt.
2. National Institute of Fisheries Oceanography, Alexria, Egypt
.
 

*Corresponding Author’s E-mail: Drmona2005@hotmail.com           
      

Accepted April 15th, 2014

Abstract

The study was conducted to evaluate the best feeding regime that will be helpful in reducing the cost of production and increasing the profit margin of Daphnia. Daphnia longispina was collected from Kafr El-Sheikh (Egypt). Four food types were tested (Scendesmus quadricola; Osillatoria ocutasama, horse manure and yeast). Six criteria were investigated (Length and width; fecundity; number of offspring/brood; number of broods/female; number of offspring/female and Life span) to meet the food quality. The tested foods didn't affect the survival, swimming activity or life span of Daphnia. Daphnia fed with Scendesmus quadricola scored significant length, width, number of offspring/pouch, total offspring/female followed by yeast. While those fed with the other algae (Osillatoria ocutasama) recorded the lowest outcomes followed by horse manure.

Keywords: 
Daphnia, food, quality, quantity, algae, yeast, manure, reproduction.


 

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