This report provides a comprehensive assessment of existing and potential feed resources for improving aquaculture productivity in Bangladesh, Myanmar, Malaysia, Egypt, Nigeria and Zambia. These countries depend heavily on imports for their supply of quality feed ingredients.
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.
Horizon Aquaculture with support from the Aquaculture Technical Vocational and Entrepreneurship Training Project (AQ TEVET) - led by WorldFish and in partnership with Musika and other partners - will be launching fourth outlet in Kasama, Zambia.
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.
Each month, we highlight a selection of our new publications. Feed was a focus in May, with a novel feeding system and a plant-based alternative to fishmeal showing potentially significant cost and sustainability benefits.
Fish feeds containing little to no wild-caught fish combined with a novel feed ingredient has the potential to greatly increase the growth of farmed tilapia, finds a new study by WorldFish and the Commonwealth Scientific and Industrial Research Organization (CSIRO).
Worldwide tilapia production is rapidly growing and becoming increasingly reliant on the provision of cost-effective sustainable formulated feeds. In the paper, the authors assessed the capacity for various inclusion rates of the feed additive Novacq™ to improve growth performance in extruded diets containing 10% fishmeal as well as the growth response at 5% and 0% fishmeal, with or without the addition of 10% Novacq™ in extruded diets for GIFT tilapia fingerlings.
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.
This study was carried out to evaluate the value chain performance of the aquaculture feed sector in Egypt, in terms of value addition, employment and profitability. The strengths and weaknesses of each link of the value chain were assessed and appropriate upgrading, management and development strategies were suggested. Quantitative data were collected for each link in the value-chain through structured questionnaires that were drafted and distributed to the key players in the sector; 25 fish feed mills and 34 fish farms covering different geographical and production regions.
Over the last decade, dramatic increases in the production of a variety of species from commercial aquaculture systems and sharp increases in per capita fish consumption have occurred in Bangladesh. This transition has been made possible by widespread adoption of semi-intensive and intensive production practices, accompanied by growth in the production and use of aquafeeds. Findings relating to the current status of aquaculture in Bangladesh have been reported in greater detail elsewhere.