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A Protocol for Collecting and Constructing Soil Core Lysimeters

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Published on: June 6, 2016

Effects of four different doses of organic manures in the production of Ceriodaphnia cornuta.

Ashutosh Srivastava¹, Raja Mansingh Rathore, Rina Chakrabarti

¹Aqua Research Lab, Department of Zoology, University of Delhi, Delhi 110 007, India.

Bioresource Technology

|July 2, 2005

Summary

Mass culture of Ceriodaphnia cornuta was optimized using a blend of organic manures. The highest yield of this live food organism was achieved with the fourth dose of manure, reaching peak production within 18 days.

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Area of Science:

Aquaculture
Limnology
Zooplankton Ecology

Background:

Ceriodaphnia cornuta is a vital live food source in aquaculture.
Optimizing its mass culture is crucial for sustainable aquaculture practices.
Understanding the impact of organic fertilization on zooplankton blooms is essential.

Purpose of the Study:

To determine the optimal dose of a cattle manure, poultry droppings, and mustard oil cake mixture for mass culturing Ceriodaphnia cornuta.
To identify the key water quality parameters influencing Ceriodaphnia cornuta bloom development.

Main Methods:

Mass culture of Ceriodaphnia cornuta using a 1:1:1 mixture of cattle manure, poultry droppings, and mustard oil cake at four different application rates (0.263, 0.526, 1.052, and 2.104 kg/m³).
Monitoring of Ceriodaphnia cornuta population density, pH, dissolved oxygen, unionized ammonia, and phosphate levels throughout the culture period.
Statistical analysis to determine significant differences in population yields across treatments.

Main Results:

The highest Ceriodaphnia cornuta density (1930/l) was achieved with the highest manure dose (2.104 kg/m³), with peak populations observed on day 18.
Dissolved oxygen levels showed an inverse relationship with manure dose but a direct relationship with organism density, with 3.28-4.63 mg/l being optimal.
Optimal conditions for bloom development included unionized ammonia levels of 0.65-0.85 mg/l and phosphate levels of 0.42-0.98 mg/l.

Conclusions:

The highest tested dose of the organic manure mixture (2.104 kg/m³) is optimal for outdoor mass culture of Ceriodaphnia cornuta.
A Ceriodaphnia cornuta bloom can be reliably achieved within 18 days under these optimal conditions.
Water quality parameters like dissolved oxygen, unionized ammonia, and phosphate are critical indicators for successful Ceriodaphnia cornuta mass culture.