Poor culture conditions in low input ponds make fish highly susceptible to infectious pathogens which lead to diseases and mortalities yet the effects of probiotics on immunity, gut microbiota and microbiological quality of fish in low input ponds are unknown. Nile tilapia, Oreochromis niloticus fingerlings (40 g) were randomly stocked at 50 fish m-3 in 1.25 m3 cages in low input ponds. The fish were fed on diets supplemented with either Saccharomyces cerevisiae (1 × 1010 CFU g-1) or Bacillus subtilis (1 × 109 CFU g-1) at six levels: Diet 0 (No probiotic); S.
There is growing interest to understand the dietary P:E requirements for the supplemental feed used in tilapia pond culture where natural food contributes to production. In an on-farm trial, we tested the effect of lowering dietary P:E ratio on fish performance, pond nutrient utilization and economic benefit under two stocking densities and feeding levels.
The nutritious pond concept is a novel approach that enables the pond itself to contribute significantly to the diet of the farmed fish/shrimp. Our research shows that feeding the pond by balancing the carbon-to-nitrogen ratio can increase the contribution of naturally occurring food in the diets of the cultured animals, thus enhancing reliance and reducing production costs and environmental impact. Field trials are currently being conducted in Vietnam and Bangladesh to better understand nutrient transfer in aquaculture ponds.
The word ‘aquaponics’ is a combination of ‘aquaculture’ (fish farming) and hydroponics (cultivation in water). It raises both vegetables and fish in a limited space at a relatively low financial cost by adding diversification in culture technique. In this study, experiments were setup with an aim for integrated culture of fish and vegetables in cost effect aquaponics. Pond aquacponics can contribute to increase in food production and will be more popular than traditional only pond fish culture system due to optimal use of the pond.
This story is about the change in the food intake of a young boy, Khoka, after his family started to grow fish and vegetables in a homestead pond. Khoka’s parents are poor. They do not have land to grow food even for their own consumption, nor do they earn enough to buy food from the market. Khoka was unhappy with the family’s monotonous diet. Then his father was introduced to WISH (water + fish) pond technology by Ali, a local service provider trained by WorldFish. This pond enables the family to grow small fish and vegetables in a portable pond that only needs 6m2 of space.
When fish have only access to formulated feed, the optimal dietary protein to energy ratio (P:E) for tilapia ranges between 18 and 23 g.MJ-1. In pond culture, where natural foods complement administrated feed, increasing the carbon:nitrogen (C:N) ratio stimulates the natural food productivity. This study assessed if lowering the dietary P:E ratio (and thus increasing the C:N ratio of the feed input in the pond) below the optimal P:E ratio affects fish productivity, food web dynamics and nitrogen balances in semi-intensively managed tilapia ponds.
Due to inadequate technical knowledge and training in advanced methods of gradually growing carp poly culture, framers are not getting expected yield. From the very beginning of the CSISA-BD project, WoldFish Center has taken initiative to introduce advanced methods in carp poly culture. To do this, the shortage of skilled trainers and training materials, has, particularly, been realized. Presently, a number of manuals on carp poly culture from Department of Fisheries, Bangladesh Fisheries Research Institute, WorldFish Center and different GOs and NGOs are available.
Aquaculture pond experiments, like agricultural crop trials, are often designed according to the statistical rules of replication and randomization: several treatments are applied to a number of experimental units (in this case: ponds) after which a certain characteristic (e.g., yield) is measured in every pond. Other factors with a possible effect on the measured characteristic are held at the same constant level as much as possible so as not to disturb treatment effects. Analysis of variance (ANOVA) is used to compare the treatments.
This assessment set out to investigate why fish farming has spread in Tonkolili District yet been poorly adopted in neighboring Bombali District. The purpose was to analyze what was working in Tonkolili but not in Bombali and then extrapolate this beyond Tonkolili. The current study aims to consolidate the most recent FAO study and map out pond distribution in Tonkolili, the most popular aquaculture development district in Sierra Leone, while also trying to make sense of this distribution.
To address the extreme food insecurity of the poor households in Bangladesh, WorldFish has designed a portable small pond which can hold fish in it and at the same time, provide water for horticulture. Trials began in 2014 when these 'WISH' (water and fish) ponds were distributed amongst selected rural 'pond-less' communities and semi-urban landless communities, and tested for integrated aquaculture and horticulture.