Michael Bernard New

A review of dietary studies with shrimp and prawns.

Abstract The results of dietary trials with shirmp and prawns published in the decade ending in early 1976 are reviewed. Current knowledge and priorities for future work are assessed under the headings: palatability and physical dietary structure, lipids and sterols, protein, carbohydrate, minerals, vitamins and larval feeding. The problems of drawing quantitative comparisons between the work of different authors are discussed and suggestions for standardizing techniques for dietary trials are made.

Freshwater prawn culture: a review

Abstract Although freshwater prawn farming forms only about 5% of the global aquaculture production of shrimps and prawns it is of considerable local importance, particularly in S.E. Asia. Recent entry into global markets is likely to stimulate renewed interest in Macrobrachium culture. This review summarizes the status of freshwater prawn culture globally in terms of research, rearing technology, marketing and economics.

Freshwater Prawn Culture

Freshwater prawn culture , Freshwater prawn culture , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی

Integrated Freshwater Prawn Farming: State-of-the-Art and Future Potential

ABSTRACT Integrated aquaculture can be defined as aquaculture systems sharing resources with other activities, commonly agricultural, agroindustrial, and infrastructural. Freshwater prawns are excellent options for integration, since they are omnivores and can therefore take advantage of a wide range of feed residuals, either from aquatic or terrestrial species. Furthermore, due to their benthic habit, they have a well-defined spatial distribution in the environment, thus favoring interaction with various species of fish, other animals, and even with plants. The integrated farming of freshwater prawns includes different culture systems, such as polyculture and coculture with other aquatic species, rice-prawn culture, hydroponics, and integration with terrestrial animals and plants. Our review includes a worldwide perspective on the main commercial integrated systems involving freshwater prawns, the present status of research on integrated freshwater prawn production and the main opportunities for integrated freshwater prawn farming in a world that is moving toward sustainability. The review continues by providing a brief summary of the future prospects for this form of aquaculture. Finally, we conclude that integrating freshwater prawn farming with other aquaculture and farming activities has considerable potential as a means of increasing food production in a sustainable fashion.

ONTOGENETIC DEVELOPMENT OF SENSORY STRUCTURES ON THE ANTENNULES AND ANTENNAE OF THE GIANT RIVER PRAWN MACROBRACHIUM ROSENBERGII (DE MAN)

ABSTRACT In this study the occurrence of sensory structures on the antennules and antennae of the giant river prawn Macrobrachium rosenbergii (De Man) during postembryonic ontogenetic development were examined. Larvae and postlarvae were obtained from hatchery recirculating tanks, juveniles from indoor nursery tanks, and adults from earthen grow-out ponds. The animals were fixed with Karnovsky fixative and dissected. Antennules and antennae were removed, metal-coated, and photodocumented using a scanning electron microscope. The antennules have aesthetascs and simple plumose and pappose setae; the antennae have simple, plumose and pappose setae. These structures increase in density, covered surface, and distribution during ontogeny and should be related to chemoreception and mechanoreception. The antennular statocyst that appears during larval stage VII of the giant river prawn has an array of sensory structures that enable the perception of chemical and tactile stimuli beginning with its early life stages. The ontogenetic changes observed allow an inference that initial-stage larvae, advance-stage larvae, juveniles, and adults have different capacities to exploit the environment.