Shrimp farming is one of the fastest growing aquaculture sectors in many parts of the world and also one of the most controversial. Rapid expansion of this sector generated income fo many countries, but has been accompanied by rising concerns over environmental and social impacts. The International Principles for Responsible Shrimp Farming provide the basis upon which stakeholders can collaborate for a more sustainable development of shrimp farming.
Resources and biodiversity of seahorses and their need for conservation in India. Captive breeding of pangasid catfish Pangasius pangasius. Establishment of post-tsunami rehabilitation information units in Thailand. Poor farmers culture tilapia intensively in ponds in Central Luzon, Philippines. Simple herbal treatment for treatment of EUS in snakehead. DNA vaccination in health management. The role of immunostimulants. Red tilapia cage culture in central Thailand. Quality improvement of farmed fish in Iranian markets.
A series of leaflets on better management practices for Penaeus monodon shrimp aquaculture in Vietnam. The leaflets are available in both Vietnamese and English and cover: Broodstock management for suppliers, postlarvae selection and transportation for seed traders, shrimp seed quality, pond preparation, good pond management, shrimp health management.
‘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’.
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.
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.
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.
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.
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.
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.
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.
This report describes the experiences and lessons learnt from activities conducted by NACA in Viet Nam to support the sustainable development of the aquaculture sector using better management practices and harmonised strategies for the management of aquatic animal health and environmental problems. Achievements included reducing the risk of diseases from seed and on farms, developing capacity at the provincial and national levels, developing an effective surveillance system and wide dissemination of experiences.
This is the annual report (2003-2004) of the Reef Fish Aquaculture R&D Project, based at the Northern Fisheries Centre, Cairns. The project provides a core platform for a suite of R&D projects addressing the feasibility of aquaculture technologies for high-value marine finfish species. This report outlines progress on the three core components of the programme, namely broodstock management and spawning, live prey production, and larval rearing and grow-out.
Nursery rearing of silver barb Puntius goniotus. Artemia enrichment and biomasss production for larviculture. Seed production of mud crab Scylla serrata in India. Macrobrachium on the southwest coast of India. Fish wastes in urban and suburban markets of Kolkata: Problems and solutions. Groups of poor women farming carps in leased ponds, Bangladesh. Lymphocystis disease and diagnostic methods in China. Mesocosm technology advances grouper aquaculture in northern Australia.
This is the report of the 3rd Regional Grouper Hatchery Production Training Course, which was conducted at the Brackishwater Aquaculture Development Center, Situbondo, East Java, Indonesia from April 18-May 8, 2005. There were a total of 17 participants coming from Australia, Brunei Darussalam, Indonesia, Malaysia, Maldives, Marshall Islands, Singapore, and Vietnam. The training consisted of a mixture of theory, practical and field trips for the participants.
Asian Development Bank study on aquaculture and poverty. The consequences of converting to organic shrimp farming. Recycling water and making money with Artemia. Advances in the seed production of cobia Rachycentron canadum in Vietnam. Australian success with barramundi cod Cromileptes altivelis. Recent grouper breeding developments in Thailand. Application of probiotics in rotifer production systems. Contract hatchery systems. Rainbow trout culture in Iran. Spotted babylon Babylonia areolata growout in earthern ponds.
Recent improvements in hatchery production technology for high-value marine finfish species such as groupers have led to an increased interest in setting up hatcheries to produce fingerlings for aquaculture. Small-scale hatcheries make this technology available to poor people in developing countries. This guide provides an outline of the requirements to establish a small-scale marine finfish hatchery, particularly the economic aspects.
Freshwater prawn culture in China and its market prospects. Demise of wastewater-fed duckweed-based aquaculture in Bangladesh. Freshwater finfish biodiversity - an Asian perspective. Her farm is destroyed, how can we help? Women oyster vendors in Eastern Thailand. Farm-level feeds and feeding practices for marine finfish. ACIAR grouper grow-out feeds and CSIRO research. Feed development and application for juvenile grouper. Grouper growout feeds. Silver pomfret culture technology.
A successful hatchery usually depends on a number of conditions; among the more important ones are right choice of site, effectiveness and efficiency of operational management. The present technology series attempts to describe the prototype warm water shrimp hatchery established and operated by SEAFDEC Aquaculture Department in collaboration with FAO since 1982. The techniques used in the operation of the hatchery have been refined, repeatedly tested and are now packaged for further testing in different environmental conditions elsewhere in the Philippines and other tropical countries.
