Macrobrachium nipponense is a species of freshwater shrimp found in Asia that was first described in References. ^ Charles Fransen (). This study includes an experimental hatchery design for the prawn Macrobrachium nipponense from the brackish water of Basrah region (Al- Mashab Marsh). Experimental hatchery designed for the prawn Macrobrachium nipponense in Marine science center, Basrah, Iraq تصميم مفقس تجريبي للروبيان.
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In the first period, the results indicated that group one 0.
While the total production in all culture systems were 12,, larvae, and between 9,, Postlarvae. Postlarvae and adults are omnivorous, eating algae, aquatic plants, molluscs, aquatic insects, worms, and other crustaceans. In total, the output of Nnipponense. Three distinct male morphotypes and a number of intermediary types exist: Abdomen has 6 somites, each with pair of ventral pleopods swimmerets. Productivity is generally lower, management is less labour intensive, and the potential for the abuse or waste of resources is minimal, and unlike the inland culture of marine shrimp the grow-out of Macrobrachium does not make agricultural land saline.
It is particularly well-suited hwtchery small long-term family businesses, can be practised by relatively unskilled fishing and rural people, generates products which may be consumed by hatfhery social classes, and is amenable to integration with crop production. The production capacity was 53, Zoea larvae, 32, Postlarvae.
To a lesser extent, this also occurs in the USA mainly for consumption by Asians or in restaurants serving Asian food and Japan.
India, Bangladesh, Viet Nam and Thailand export a significant proportion of their wild-caught and macronrachium prawns. Viet Nam is a significant producer and exporter of farmed Macrobrachiumalthough its output is masked by being included in the statistical category ‘freshwater prawns, shrimps nei’.
Keywords Selenium nippoennse Moult Macrobrachium nipponense shrimp.
Iraqi Journal of Aquaculture
Swimmerets of sixth abdominal somite stiff and hard and, with the median telson, serve as the tailfan. Males and females have different growth rates and males exhibit heterogenous individual growth HIG ; these are vitally important factors in grow-out management.
Gravid females migrate downstream into estuaries, where eggs hatch as free-swimming larvae in brackishwater. The introduction of broodstock, initially from Hawaii and Thailand, into non-indigenous areas around the world began in the s. Potential for expansion exists but small-scale producers may need to co-operate in collective hatvhery to exploit these opportunities.
Macrobrachium nipponense – Wikipedia
The study confirmed that the presence of pathological fungi Aspergillus and Penicillium have a large impact on shrimp diseases fungal infection, especially when the culture conditions are not appropriate. But the results of group five were 3. In some cases antibiotics and other pharmaceuticals have been used in treatment but their inclusion in this table does not imply a recommendation.
Lethargy; spiralling swimming; reduced feeding and growth; bluish-grey body colour; affects larvae, especially stages VI and VII. Listing 1 – 5 of 5. Freshwater prawns are a distinct product from marine shrimp, which have their own favourable culinary characteristics. The transition from rapidly growing OC to the slowly growing BC morphotype follows a “leapfrog” growth pattern.
The major disease problems affecting Macrobrachium rosenbergii generally occur because of poor intake water treatment, poor husbandry, overcrowding, poor sanitation, and non-existent or inadequate quarantine procedures.
External parasites that inhibit swimming, feeding and moulting; affect all life stages. Although reared in captivity from time immemorial, modern farming of this species originated in the early s when FAO expert Shao-Wen Ling, working in Malaysia, found that freshwater prawn Macrobrachium rosenbergii larvae required brackish conditions for survival. The measures to combat these problems are referred to as improved husbandry IH in the table below, which records some of the more important diseases.
After metamorphosis, PL assume a more benthic life style and begin to migrate upstream towards freshwater. From PL onwards prawns swim forwards, dorsal side uppermost. Furthermore, fewer poor quality products enter the international markets now that the technique for avoiding “mushiness” has become well-known.
The rate of expansion in the largest producer, China, has slowed, partly due to the farming of an alternative indigenous species Macrobrachium nipponense and partly because marine shrimp are now being reared in freshwater and are sometimes referred to erroneously as freshwater prawns. Edited and compiled by Valerio Crespi and Michael New. Males can reach total length of mm; females mm. The type and behaviour of the males affects the growth rates of other prawns.
Further global expansion is difficult to predict, since it depends mainly on the volume of consumer demand. Text by New, M. However, the results of the second period for the five groups were: The farming of other species of Macrobrachiumnotably M.
Specific negative effects of M. It is often found in extremely turbid conditions.
FAO – Macrobrachium rosenbergii
Larvae mostly consume zooplankton mainly minute crustaceansvery small worms, and larval stages of other crustaceans.