1 January 2000 | 35774 views
NACA publishes technical papers and manuals for a wide variety of farming systems and related environmental and social issues. Many of these provide guidance on better management practices with a view to improving crop outcomes and on-farm resource utilisation efficiency. By using inputs such as feed and power more efficiently, farmers can simultaneously improve their profitability and environmental performance.
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NACA publishes a wide range of aquaculture publications including technical manuals, workshop proceedings, better practice guidelines and several serials including Aquaculture Asia Magazine, the NACA Newsletter and the Quarterly Aquatic Animal Disease Report. To keep up to date with developments you could consider subscribing to our free email newsletter service and RSS feed.
In this collection
Better practice guidelines: Spawn production in hatcheries
These guidelines provide advice on producing fish seed in small-scale hatcheries. This publication is also available in Oriya.
Better practice guidelines: Fry production - nursing spawn
‘Spawn’ is the name for the young fish about three days old that are available from hatcheries. Sometimes these young fish are also called hatchlings. The spawn of catla, rohu and mrigal is about 6-8 mm long. At this stage, the ‘yolk sac’ is absorbed, the mouth opened and the fins fully developed. Spawn are reared intensively, first to the ‘fry’ size and then to the ‘fingerling’ size. All the three stages are marketed and collectively called ‘seed’.
Better-practice guidelines: Fast fingerling production - nursing spawn in ponds
The “fast fingerling system” can produce advanced fingerlings about two months earlier than they are normally available from fish farms. The farmer uses just one pond for continuous growing until fingerling size is reached, and fewer fish are stocked. A farmer with a small, seasonal pond can produce fingerlings in one month. These can then be sold for a high price because everyone wants fingerlings as early as possible.
Better practice guidelines: Fingerling production nursing fry in ponds
The fingerling rearing pond, like the nursery pond, should be free from weeds and predators. Submerged weeds and predators are killed by mahua oilcake, which then acts as a good fertiliser. If there are no weeds, to kill predators and competitors quickly you can just add 100 kg of urea followed 24 hours later by 200 kg of fresh bleaching powder for a 1-ha area of a 1-m deep pond.
The international seafood trade: Marine ornamentals trade in the Philippines and options for its poor stakeholders
This report provides insight into the status of the marine ornamental fish trade in the Philippines, including policy environment, collection, distribution channels, markets and constraints. The report also reviews the livelihoods of poor stakeholders in market chains including economic and financial aspects, natural and physical resources, livelihood patterns, social structures. The report provides recommendations for policy makers and stakeholders in improving the livelihoods of poor stakeholders in marine ornamental fish collection and market chains and resource management.
Better practice guidelines: Fingerling production nursing spawn and fry in pens
In watersheds, medium irrigation projects can be useful for aquaculture even though these water bodies are many times larger than ponds, and are basically built for irrigation or water storage. However, the full potential of these water bodies is not yet realised. Net pens or cages can be used to rear fingerlings in such environments.
Better practice guidelines: Advanced fingerling production in seasonal ponds
It is best to stock advanced fingerlings in large ponds, tanks, and in both small and large reservoirs, since they can better escape predators and competitors. Seasonal ponds, often 0.10-0.15 ha and 1.5-1.8 m deep can be used as rearing ponds for raising advanced fingerlings. Low water levels at the end of the season will make netting and harvesting easy.
Better practice guidelines: Advanced fingerling production in perennial ponds
Everyone wants advanced fingerlings as early after the rains as possible. They fetch a good price and make marketable fish production possible in seasonal ponds. One way to produce early season advanced fingerlings is to grow them in perennial ponds and store them at high density with minimal feeding for the coming year. Whe such "stunted" fingerlings are stocked into ponds with good feed they grow fast and can be marketed in about 6-8 months.
Better practice guidelines: Spawn production of common carp
Common carp is a foreign fish and there are several varieties. The variety used in Western Orissa is the fully scaled carp, which suits the tropical climate. Common carp lives and feeds near the pond bottom and can be grown with the Indian major carps, catla, rohu and mrigal as a 'polyculture' (which means growing many different types of fish together). It can also be grown alone, as a 'monoculture' in rice fields with high dykes that retain water.
Better management practices manual for black tiger shrimp (Penaeus monodon) hatcheries in Viet Nam
In order to provide practical and effective technical guidance for shrimp hatchery management, it is necessary to establish a set of better management practices (BMPs) which underpin an effective hatchery production system. This document is not a complete manual on the management of P. monodon hatcheries but concentrates on the implementation of BMPs for the hatchery covering all of the critical stages and processes in the production cycle, which are currently believed to be causing problems in Vietnamese hatcheries.