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Book (series)Production of triploid Pacific oyster (Crassostrea gigas) spat
A practical manual
2024Also available in:
No results found.Naturally spawned oysters are typically diploid, each cell containing two sets of chromosomes. Diploid oysters exhibit seasonal variability in condition because they spawn during the summer months following a period of ripening as sea temperatures warm. Often this coincides with the peak period for selling oysters in many countries. Triploid oysters contain three sets of chromosomes and because they are for the most part sterile, they can maintain suitable market quality throughout the year and have organoleptic qualities that are preferred by many consumers. Growth of triploids is generally much faster than diploids grown under the same conditions. For these reasons, many hatcheries produce triploid oysters. Triploid oysters can be readily produced in hatcheries using either direct induction techniques or by first producing tetraploid oysters and then using sperm from male tetraploids to fertilise eggs from diploid females. There are several different direct techniques to induce triploidy, including physical treatments such as pressure, temperature or salinity shock or chemical treatments using either cytochalasin B or 6-Dimethyl aminopurine (6-DMAP). -
Book (stand-alone)Guide de bonnes pratiques conchylicoles 2024
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No results found.Ce guide de bonnes pratiques conchylicoles est conçu pour promouvoir des pratiques durables et responsables dans l’élevage et la production de mollusques bivalves, tels que les moules, les huîtres et les palourdes. Il vise à assurer la protection de l’environnement, la santé des bivalves et la sécurité alimentaire des consommateurs tout en favorisant une industrie des mollusques viable et durable.Cette publication est nécessaire pour prévenir les impacts environnementaux. La conchyliculture peut nuire aux écosystèmes côtiers, y compris la dégradation de l’habitat et la transmission de maladies aux populations sauvages. Le guide encourage les agriculteurs à adopter des méthodes respectueuses de l’environnement. -
Book (series)The living marine resources of the Western Central Pacific. Volume 1. Seaweeds, corals, bivalves and gastropods 1998
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No results found.This multivolume field guide covers the species of interest to fisheries of the major marine resource groups exploited in the Western Central Pacific. The area of coverage includes FAO Fishing Area 71 and the southwestern portion of Fishing Area 77 corresponding to the South Pacific Commission mandate area. The marine resource groups included are seaweeds, corals, bivalves, gastropods, cephalopods, stomatopods, shrimps, lobsters, crabs, holothurians, sharks, batoid fishes, chimaeras, bony fishes , estuarine crocodiles, sea turtles, sea snakes, and marine mammals.
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