By Gilbert Barnabe
В книге освещены биологические и экологические основы производства биокультур в воде, а также рассказывается о путях решениях проблем, возникающих во время данного процесса.
Read or Download Aquaculture: Biology And Ecology Of Cultured Species (Ellis Horwood Series in Aquaculture and Fisheries Support) PDF
Similar marine biology books
Comprising by way of some distance the most important and so much assorted workforce of vertebrates, fishes occupy a extensive swathe of habitats starting from the private ocean abyss to the top mountain lakes. Such awesome ecological variety and the ensuing kind in way of life, anatomy, body structure and behaviour, make unraveling the evolutionary historical past of fishes a frightening activity.
The biology of terrestrial molluscs
With an predicted 35,000 species, terrestrial molluscs are some of the most profitable and various animal teams in land-based ecosystems. those animals have lengthy been of value to human societies as foodstuff, drugs, crop pests, vectors of parasites, and as instruments, own ornamentation and forex in exchange.
Artificial Reefs in Fisheries Management
Whereas man made reefs can have a lot to provide, they continue to be an anecdote within the better scheme of fisheries administration, essentially as a result of loss of info particular to validating their use. in accordance with papers awarded on the ninth convention on synthetic Reefs and synthetic Habitats (CARAH) and likewise together with unique articles written for this reference, man made Reefs in Fisheries administration brings to the leading edge the present country of data concerning synthetic reefs and their pragmatic software to furthering fisheries sustainability.
Marine Renewable Energy Technology and Environmental Interactions
It really is now widely known that there's a desire for long term safe and appropriate sustainable types of power. Renewable power from the marine atmosphere, particularly renewable power from tidal currents, wave and wind, can assist in achieving a sustainable strength destiny. Our figuring out of environmental affects and compatible mitigation tools linked to extracting renewable strength from the marine setting is bettering for all time and it truly is crucial that we be ready to distinguish among usual and anthropocentric drivers and affects.
- Introduction to the Biology of Marine Life
- CRC Handbook of Marine Mammal Medicine: Health, Disease, and Rehabilitation
- The Biology of Calanoid Copepods
- Estuaries: A Lifeline of Ecosystem Services in the Western Indian Ocean
Extra info for Aquaculture: Biology And Ecology Of Cultured Species (Ellis Horwood Series in Aquaculture and Fisheries Support)
Aquaculturists must pay close attention to the hardness of water. Various indices are used to measure hardness: – Total hardness. This is the sum of the calcium and magnesium ions. It is an expression of the temporary hardness (which disappears when the water is boiled because of the deposition of calcium) and permanent hardness (which remains after boiling; unprecipitated calcium and magnesium). – Hardness expressed as either the level of calcium or of magnesium respectively. – Alkalinity. This gives information on the level of carbonates, bicarbonates and hydroxides but it is necessary to distinguish: – simple alkalinity, which measures the total level of alkaline hydroxides but only half the level of carbonates – total alkalinity, which measures the total level of hydroxides, carbonates, alkaline bicarbonates and alkaline earths.
46. 31. Fig. 6 (Alzieu 1989) shows the relationship between oxygen saturation, salinity and temperature. THE PRODUCTION OF AQUATIC ORGANISMS [PT. 025% of the principal constituents. 03%) may be of disproportionately great significance because they include the mineral elements (nitrogen (N) and phosphorus (P)) which are essential for the production of living matter in water. The nitrogen compounds (nitrites, nitrates, ammonium salts) and phosphorus compounds (various phosphates) are used with carbon dioxide (see ‘Dissolved gases’, below) by phytoplankton in the synthesis of living matter under the action of sunlight (photosynthesis).
It is essential that the trout have access to the surface (or to an air pocket). A 10 m increase in depth means an increase in pressure of one atmosphere. Atmospheric precipitation Rain may affect aquaculture by reducing the salinity of the water and thereby eliminating marine species in shallow sites which are normally saline. There may be a proliferation of pathogenic bacteria from fresh water which cannot survive in full-strength sea water (this leads to a prohibition on the sale of shellfish as in 1989 in the Etang de Thau because of Salmonella).