Culture of Zooplankton (Brachionus Calyciflorus, Moina Micrura And Daphnia Pulex) As Live Food for Heterobranchus Bidorsalis Hatchlings

Description

– Culture of Zooplankton (Brachionus Calyciflorus, Moina Micrura And Daphnia Pulex) As Live Food for Heterobranchus Bidorsalis Hatchlings –

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Abstract

Live food Zooplankton population density in different zones of Awuma River at Shabu was investigated and Brachionus calyciflorus, Moina micrura, and Daphnia pulex screened from the littoral zone of the River at Shabu before the onset of the rainy season was isolated into the monospecific culture in the laboratory.

Cow dung, chicken droppings, groundnut cake, soybean cake, rice bran, and single super phosphate were combined in different proportions of three, four, and five combinations of manure in solution in three replicates for a culture period of 9, 11, and 12 days for each of the zooplankton respectively.

Effects of concentration, a combination of manures, and duration of production of the zooplankton were investigated. Dissolved oxygen, (mg/L) temperature (0C), carbon dioxide (mg/L), and total alkalinity (mg/L) of the water used for the various treatments were monitored.

Introduction

Naturally, fishes in the wild depend on plankton for the survival of their hatchlings throughout their fry growing seasons. Some zooplankton is essentially used to feed fry of fish species that do not accept artificial feeds (Bryant & Matty, 1980).

Arrhenius and Hanson (1993) reported that some fish species feed exclusively on zooplankton during their entire life while about 90% of foods of herring (Clupea harengus) consist of zooplankton. 

Sipaúba-Tavares and Bachion (2002) reported that zooplankton reproduction and growth rate increases the availability of better food quality for subsequent trophic levels.

Live food micro-organisms are important food sources for many fish species and the success of culturing zooplanktivorous fish fry depends primarily on zooplankton, their composition, and density (Fernando, 1994).

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