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Life History Freshwater prawns, like all crustaceans, have a hard outer skeleton or shell that must be shed regularly in order for growth to occur. The process of shedding the shell is called "molting," and weight and size increases occur principally soon after each molt. Because of these periodic molts, growth occurs in distinct increments, rather than continuously. Bapak Udang Galah. Details...

Breeding Females generally become reproductively mature within 6 months. Mating can occur only between hard-shelled males and soft-shelled females, i.e., females who have just completed a premating or prenuptial molt. The male deposits sperm into a gelatinous mass that is held underneath the body of the female, between her fourth pair of walking legs. Eggs are laid within a few hours after mating and are fertilized by the sperm contained in the gelatinous mass attached to the outside of the female's body. The female then transfers the fertilized eggs to the underside of the abdominal (tail) region, in a "brood chamber," where they are kept aerated and cleaned by movement of the abdominal swimming appendages. Eggs remain attached to the abdomen until they hatch. The number of eggs produced at each spawn is directly proportional to the size of the female. As long as water temperature exceeds 70 °F, multiple spawns per female can occur annually. Females carrying eggs are termed "berried females." The bright-orange color of newly spawned eggs gradually changes to orange, then brown, and finally gray about 2 to 3 days before hatching. At a temperature of 82 °F, the eggs hatch approximately 20 to 21 after spawning. Newly hatched freshwater prawns enter into a larval phase of growth and metamorphosis. Bapak Udang Galah. Details...

Larvae After hatching, larvae are released and swim upside down and tail first. The larvae cannot survive in freshwater beyond approximately 48 hours and migrate to brackish water with a salinity of 10 to 14 parts per thousand (ppt). Larvae are aggressive sight feeders and feed almost continuously, primarily on small zooplankton, worms, and larval stages of other aquatic invertebrates. Larvae undergo 11 molts, each representing a different stage of metamorphosis. Following the last molt, larvae transform into postlarvae. Transformation from newly hatched larvae to postlarvae requires 15 to 40 days, depending upon food quantity and quality, temperature, and a variety of other water quality variables. Bapak Udang Galah. Details...

Postlarvae After metamorphosis to postlarvae, the prawns resemble miniature adult prawns, about 7 to 10 mm (0.3-0.4 inch) long and weighing 6 to 9 mg (50,000 to 76,000 per pound). The prawns behaviorally change from living suspended in the water column to principally bottom dwelling, crawling individuals. When they do swim, they move like adults with the dorsal (back) side uppermost and in a head-forward direction. Bapak Udang Galah. Details...

Postlarvae Diet Postlarvae can tolerate a range of salinities and migrate to freshwater upon transformation. In addition to the food they ate as larvae, larger pieces of animal and plant materials will be ingested. The diet includes larval and adult insects, algae, mollusks, worms, fish, and feces of fish and other animals. At high densities, or under conditions of food limitations, prawns become cannibalistic. Bapak Udang Galah. Details...

Prawn Juvenile Postlarvae are translucent and may have a light-orange-pink head. As they change to the juvenile stage, they take on the bluish to brownish color of the adult stage. Juveniles are intermediate in size between postlarvae and adults; however, no standard definition for the juvenile stage exists. Bapak Udang Galah. Details...

Tangsi Perambut Udang Galah Perambut udang galah kebiasaannya ialah menggunakan tangsi 6 paun hingga 12 paun. Ini sudah memadai dengan berat udang itu sendiri. Kekuatan 12 paun boleh menampung dan mengangkat beban maksimum 5.5 kilogram sudah terlalu besar untuk udang galah sungai yang purata 50 gram hingga 500 gram. Panjang perambut seeloknya 15 sentimeter atau lebih kurang sejengkal jari orang dewasa. Jenis tangsi biarlah yang lembut supaya udang galah tidak begitu 'terasa' beban ketika mengunyah umpan. Bapak Udang Galah Details...

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Good Baits Freshwater Prawn classify as omnivorous animal because species practically eat all kinds she being met. To facilitate detect faster prawn we need use bait 'smelly'. In clear area of water under and highly cautious prawn induce except we fishing night time or deep hollow dominate freshwater prawn. Bapak Udang Galah Details...

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The Gian Fresh Water Prawns

Written by Administrator
Friday, 30 November 2007
The giant freshwater prawn has a longer and narrower body and legs than its saltwater-dwelling cousins. Like salmon and some eels, the prawn moves from estuaries to freshwater to spawn. Prawns live in rocky habitats from the intertidal zone to a depth of 100 ft,but normal adult habitats is between 40 and 50 ft. Mature prawns breed in the autumn. The female carries fertilized eggs on small oppendages of the abdomen known as pleopods or swimmerettes from July to January , at which time the larvae hatch and spend up to 3 months in the fresh water column before settling on the bottom.
Last Updated ( Monday, 31 March 2008 )

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Prawns Information

Freshwater prawn farming the world over has registered increase in the past decade. In India, a spurt in freshwater prawn farming activities can be seen in the recent years. The objective of the symposium was to evaluate globally the progress made and to critically analyse the constraints and shortcoming in freshwater prawn farming and research. K. V.Thomas, Minister for Fisheries and Tourism,Government of Kerala while inaugurating the symposium, stressed on the importance of freshwater prawn farming in India, especially in Kerala. He expressed concern over the pollution of the freshwater bodies in the country and suggested a scheme for cleaning Vembanad Lake, one of the largest lakes in the country.

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Prawn Baits

Lobster classify as omnivorous animal viz species practically eat all kinds she being met. To facilitate detect faster prawn we need use bait 'smelly'. In clear area of water under and highly cautious prawn induce except we fishing night time or deep hollow dominate lobster.Quick and usual prawn bait bound prawn is perumpun - nest type, mangrove, beach and palm. Earthworm either become hysterical or ordinary type. Crayfish child or dead / living rice prawn, scallop, cockle content, ala ala - use part that the harsh. Fish content slice fine lengthwise according to size hook. Lobster content - cut according to size hook. Market prawn no matter what sort, dead or living drain fry both of them can. Other choice - heart / chicken liver but only suitable to hook in the pool.

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