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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Both domestic and international markets exist and are expanding.
Chinese production actually fell in but, as the global market expands, is expected to expand again later. Gravid females migrate downstream into estuaries, where eggs hatch as free-swimming larvae in brackishwater.
Thorax contains three pairs of maxillipeds, used as mouthparts, and five pairs of pereiopods true legs.
This hatchery consist of five parts: Keywords water currents Macrobrachium nipponense movement behaviour. The distribution of these age-groups determined at different parts of the tank. However, the results of the second period for the five groups were: In total, the output of M. But the results of group five were 3.
Iraq Academic Scientific Journals
Furthermore, fewer poor quality products enter the international markets now that the technique for avoiding “mushiness” has become well-known. Peeled, mostly wild-caught Macrobrachium rosenbergii have long been exported globally, but farmed shell-on and normally head-off freshwater prawns are also a familiar sight in the supermarkets of Europe now. Abstract The feeding behavior experiments showed that the feeding of juveniles Macrobrachium nipponense are mostly and frequently occurred on the artificially net covered walls of the experimental tanks, this finding were observed in all the three tested bottom types net covered wall Awater column B and bottom C ; smooth or sand-clay bottomand during the two tested feeding times after 2 hr and 24 hr of experiments onset, and in both smooth and sand-clay tanks bottom.
Abdomen has 6 somites, each with pair of ventral pleopods swimmerets. Code of Conduct for Responsible Fisheries. 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’. Further global expansion is difficult to predict, since it depends mainly on the volume of consumer demand.
Body usually greenish to brownish grey, sometimes more bluish, darker in larger specimens. As a conclusion of the observed results this prawn seems to be a pelagic feeding species. Text by New, M. Since then, giant river prawn culture has developed in every continent, particularly in Asia and the Americas. It is particularly well-suited to small long-term family businesses, can be practised by relatively unskilled fishing and rural people, generates products which may be consumed by all social classes, and is amenable to integration with crop production.
In the first period, the results indicated that group one 0. 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.
FAO – Macrobrachium rosenbergii
The major disease problems affecting Macrobrachium rosenbergii generally occur because of poor hathcery water treatment, poor husbandry, overcrowding, poor sanitation, and non-existent or inadequate quarantine procedures. The presence of this new BC male then delays the transition of the next OC to the BC morphotype, causing it to attain a larger size following its metamorphosis.
While the total production in all culture systems were 12,, larvae, and between 9,, Postlarvae. Abstract This study includes an experimental hatchery design for the prawn Macrobrachium nipponense from the brackish water of Basrah region Al-Mashab Marsh.
Iraqi Journal of Aquaculture
The study confirmed that the presence of pathological fungi Aspergillus and Penicillium have a large impact on shrimp diseases fungal infection, especially when the hatcherry conditions are not appropriate. The production capacity was 53, Zoea larvae, 32, Postlarvae.
BC males have extremely long second pereiopods; those of OC males are golden coloured; SM have small, slim, almost translucent claws. After metamorphosis, PL assume a more benthic life style and begin to migrate upstream towards freshwater. From metamorphosis onwards prawns can also walk, not only on the sub-stratum but also over damp hatcery including stones by river edges, up vertical surfaces small waterfalls, weirs, etc. Rostrum long, normally reaching beyond antennal scale, slender and macrobracchium sigmoid; distal part curved somewhat upward; dorsal and ventral teeth.
Eleven distinct larval stages. Specific negative effects of M.
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.