By Sascha W. Felix
Read or Download Advances in shrimp aquaculture management PDF
Best oceans & seas books
Successive versions of this notable paintings have facilitated foreign exchange in fish and fish items via making to be had a accomplished resource of specialized info and normal wisdom on fish, different marine existence and fish items in advertisement use at the present time. The revised and accelerated new version contains over 1,200 entries and new languages akin to Korean.
During this ebook, scientists from quite a few disciplines handle the advances in seafood learn with appreciate to caliber, defense, consumer's calls for and processing of untamed and farmed fish. The dietary houses of marine lipids and lipid oxidation from version structures to seafood are offered. numerous contributions at the results of traditional anti-oxidants to avoid oxidation also are incorporated.
This sensible publication offers an up-to-date source for the id of micro organism present in animals inhabiting the aquatic setting, illustrated with color pictures. It comprises extended biochemical id tables to incorporate newly pointed out pathogenic and saprophytic micro organism, molecular id assessments now to be had for a better variety of aquatic bacterial pathogens, additional info at the pathogenesis and virulence of every organism and new assurance of conventional and molecular identity of fungal pathogens and caliber insurance criteria for laboratories.
''Symbiosis in Fishes'' presents entire assurance of the biology of partnerships among fishes and invertebrates, ascending the phylogenetic scale, from luminescent micro organism, sponges and coelenterates to molluscs, crustaceans and echinoderms. either facultative and compulsory partnerships are reviewed with emphasis at the behavioral, ecological and evolutionary elements of fish symbiosis.
- Herman Melville's Whaling Years
- Reefs and Carbonate Platforms in the Pacific and Indian Oceans (IAS Special Publication 25)
Extra info for Advances in shrimp aquaculture management
As the nutrient level of seawater varies from place to place and season to season, a programme of fertilization that works successfully in one location might not be working well in another area. Hence, it is necessary to apply fertilizers at different rates/levels at different times of the year in shrimp ponds. The best way to develop a suitable method for fertilizing pond water is to apply a moderate amount of fertilizer and observe its effect on the phytoplankton growth. Subsequently depending on the performance, the rate of application is to be adopted or determined.
Shrimps are considered to be more sensitive to abrupt changes in water quality parameters and hence utmost care needs to be exercised to maintain the water quality in shrimp farms. (i) Temperature Both growth and survival are directly influenced by temperature variations. Generally, the rate of growth increases with temperature, but at higher temperatures mortality also increases. While each species has its own optimum temperature range, temperatures between 26 and 30oC are generally considered suitable in terms of maximum yield.
Of the important species cultured, it is generally considered that P. monodon has wider salinity tolerance. Though the optimal growth of P. merguiensis was obtained at 27 ppt, P. semisulcatus seems to require a relatively high saline water. All species of penaeid shrimps however require almost marine seawater for maturation and spawning. To protect the shrimp ponds against abrupt changes in salinity: (a) There must be a provision to exchange pond water rapidly, and whenever it is required. (b) Sluice gates must be designed so as to permit rapid draining of surface water during and after heavy rains.