Carp polyculture is the most common, popular, and successful aquaculture system in Nepal. Including mono-sex Nile tilapia in carp polyculture could enhance fish productivity. This present LEE work was conducted at the Fish hatchery complex of Fisheries Program, Agriculture and Forestry University, Rampur, Chitwan, in a cemented tank of area 25 m² for 26 days to study the carp and mono-sex Nile tilapia in a polyculture system.
The pond was fertilized using urea and DAP at the rate of 4,7 g/m²/week and 3.5 g/m²/week respectively. Fishes except Grass carp were fed twice daily with the pellet made from mustard oil cake and rice bran mixed at a 1:1 ratio at the rate of 5% BW. Grass carp were fed with duckweed at a rate of 50% BW twice a day from 7:30 am to 8 am and 1:30 pm to 2 pm. Water quality parameters i.e., water temperature, transparency, water depth, dissolved oxygen, and pH and were monitored daily while total alkalinity was monitored weekly. Sampling of fish was done fortnightly to check fish growth and adjust feed quantity.
All the water quality parameters were within the optimal range of fish production except for DO which was very high during the afternoon. The extrapolated GFY and NFY were 14.5 t/ha/yr and 9.6 t/ha/yr, respectively. The overall survival of fish was 87% and AFCR was 1.4. The total variable cost and the production cost was NRs. 220/kg. Fishes were transferred to the Aquaculture farm, assuming the selling rate NRs. 300/kg. This makes the total gross return was of NRs. 875, making a total net profit of NRs. 327. The B: C ratio was 1.59. From this LEE work, it was concluded that carp and mono-sex Nile tilapia polyculture is a reliable and profitable venture to carry out.
Inhaltsverzeichnis (Table of Contents)
- INTRODUCTION
- General introduction
- Objectives
- General objective
- Specific objectives
- Limitations of the study
- LITERATURE REVIEW
- Global status of aquaculture
- Status of aquaculture in Nepal
- Carp polyculture
- Principle of carp polyculture
- Pros and cons of carp polyculture
- Pros of polyculture
- Cons of polyculture
- Carp-Nile tilapia polyculture
- Culture species
- Labeo rohita (Hamilton, 1822)
- Hypophthalmichthys molitrix (Valenciennes, 1844)
- Hypophthalmichthys nobilis (Richardson, 1845)
- Ctenopharyngodon idella (Valenciennes, 1844)
- Cyprinus carpio (Linnaeus, 1758)
- Oreochromis niloticus (Linnaeus, 1758)
- Stocking
- Water quality requirements for carps and Nile tilapia
- Feed and feeding
- Natural food
- Supplementary food
- Liming
- Fertilization
- Yield and FCR
- Economics of carp and Nile tilapia polyculture
- MATERIALS AND METHODS
- LEE site
- Tank preparation
- Draining and drying
- Liming
- Tank filing
- Fertilization
- Stocking of fingerlings
- Tank management
- Feed and feeding
- Fertilization
- Water quality monitoring
- Fish sampling
- Fish harvesting
- Marketing of fish
- Analytical methods
- Fish growth parameters
- Gross margin analysis
- Statistical analysis
- RESULTS
- Water quality
- Daily diurnal monitoring
- Weekly monitoring
- Fish growth and production
- Silver carp
- Bighead carp
- Grass carp
- Rohu
- Common carp
- Nile tilapia
- Growth, survival, and yield of all fishes
- Gross margin and Fish marketing
- Water quality
- DISCUSSION
- Water quality
- Growth and yield of fish
- Gross margin and fish marketing
Zielsetzung und Themenschwerpunkte (Objectives and Key Themes)
This thesis investigates the efficacy of polyculturing carp and Nile tilapia in a cemented tank. The study aims to evaluate the growth, survival, yield, and economic viability of this integrated system. It aims to contribute to sustainable aquaculture practices in Nepal by examining the feasibility and profitability of this polyculture approach.
- The optimal conditions for carp and Nile tilapia polyculture in a cemented tank
- The growth and survival rates of different carp and Nile tilapia species
- The yield and economic profitability of this polyculture system
- The impact of water quality parameters on fish growth and survival
- The effectiveness of different feeding strategies for optimizing fish production
Zusammenfassung der Kapitel (Chapter Summaries)
The thesis begins with a general introduction to the field of aquaculture, highlighting the global and national context, and defining the study's objectives and limitations. Chapter 2 delves into a comprehensive literature review exploring carp polyculture, including its principles, advantages, and disadvantages, as well as the specific characteristics of each species involved in the study. It also examines the potential for integrating Nile tilapia into the carp polyculture system. The following chapters discuss the materials and methods used in the study, outlining the experimental design, tank preparation, stocking, feeding, water quality monitoring, and data analysis. Chapter 4 presents the results of the study, focusing on water quality parameters, fish growth, survival, and yield, as well as the economic feasibility of the polyculture system. The discussion section analyzes the findings, drawing insights into the factors that influence the success of the polyculture system and its potential for further application and optimization.
Schlüsselwörter (Keywords)
This research focuses on aquaculture, polyculture, carp, Nile tilapia, cemented tanks, growth, survival, yield, economic feasibility, water quality, feeding, and sustainable practices in Nepal.
- Quote paper
- Saurav Lamichhane (Author), 2020, Carp and Mono-Sex Nile Tilapia Polyculture in a Cemented Tank, Munich, GRIN Verlag, https://www.grin.com/document/974739
