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By Michael Bernard New, Valenti, James H. Tidwell, Louis R. D'Abramo, Methil Narayanan Kutty

Protecting normal biology and each point of farming freshwater prawns, from present learn to improvement and advertisement perform, this has turn into largely considered as a landmark book within the box. the well known group of editors, New, Valenti, Tidwell, D’Abramo and Kutty, have amassed state of the art contributions from the world's best specialists to supply farm body of workers, enterprise managers, researchers and invertebrate, freshwater and crustacean biologists with an important source.

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The paired vasa deferentia are simple tubes that end in terminal ampullae, which contain the spermatophores and open at the gonopores on Ovaries Heart The crustacean nervous system consists of a large supraoesophageal ganglionic mass (also referred to as the brain) and a ventral nerve cord with a pair of ganglia corresponding to each embryonic somite. The ganglia are joined longitudinally by connectives and transversely by commissures (Fig. 7a) (McLaughlin 1983). (a) (b) Supraesophageal ganglion (Brain) PT Ventral nerve cord PT Oviduct Hepatopancreas Gonopores (3rd pereopods) OL OL AIIN Testes Heart AIIN Vas Deferens AIINv AIINv OC Stomach Hepatopancreas Gonopores (5th pereopods) Fig.

L. (2001) The freshwater decapod crustaceans of Halmahera, Indonesia. Journal of Crustacean Biology 21(3):665– 95. Cai, Y. L. (2002) The freshwater palaemonid prawns (Crustacea: Decapoda: Caridea) of Myanmar. Hydrobiologia 487:59–83. , Naiyanetr, P. L. (2004) The freshwater prawns of the genus Macrobrachium Bate, 1868, of Thailand (Crustacea: Decapoda: Palaemonidae). Journal of Natural History 38:581– 649. , de Bruyn, M. B. (2005) Microsatellite loci in the eastern form of the giant freshwater prawn ( Macrobrachium rosenbergii).

The midgut derives from the endoderm so has no cuticular covering and its cells are directly in contact with the lumen (Icely & Nott 1992). The midgut starts where the digestive gland joins the main tract. The foregut is a chambered structure situated in the cephalothorax and consists of the oesophagus and the proventriculus, which is formed of an anterior and posterior chamber. The two chambers of the proventriculus have historically been referred to as cardiac and pyloric stomachs but, since this terminology derives from vertebrate anatomy where the anterior most part of the stomach is closest to the heart, this makes no sense whatsoever in crustaceans where the heart is found at the most posterior end of the thorax.

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