Pearl Oyster Health Management: A Manual
Food and Agriculture Organization of the United Nations, 2007 - Nature - 120 pages
The pearl oyster industry is a growing multibillion dollar sector of mollusk aquaculture. Pearl farming occurs throughout Australasia, the Middle East and South America. Few species of mollusks possess the ability to produce pearls of gem quality. The South Sea pearl oyster is one of them. Pearl production in the wild is an unpredictable and uncontrolled event which human intervention, through pearl culture, has progressively overcome by improving culture practices. Farming mother-of-pearls shares commonalties with edible mollusk aquaculture. However, the endproduct, pearl production, is unique to this sector. In aquatic production, heal issues are of utmost importance; pearl production is based entirely upon health. The pearl itself is a product of the oyster's immune defenses as a response to soft-tissue irritation. Exploited stocks receive frequent handling stresses which often predispose farmed animals to infection and diseases. Therefore, the importance of health management for pearl oysters is paramount. Today, most disease problems are caused by opportunistic pathogens taking advantage of oysters weakened by the stress of handling, including pearl surgery and sub-optimal growing conditions. Except for the mass mortalities experienced in Japan, the pearl oyster industry have not yet faced the types of epizootics which has impacted mollusk culture elsewhere in the world. Development of the industry will, inevitably, lead to increased risk of disease introduction, spread or emergence. Against such an unwanted future, health management is the critical defense line. The objectives of this technical paper are to: (i) review pearl oyster mortalities and disease problems in order to help design programs aimed at reducing the risks from diseases; and (ii) provide technical guidance to pearl oyster farmers and the industry on management of pearl oyster health so that sector development will be sustainable not only in providing huge employment to communities where pearl farms are located but also contributing to maintain environmental integrity. Pearl oyster farming can serve as environmental sentinels recognizing the fact that pearl oysters thrive only in pristine environment. This publication contains three parts. Part 1 consists of pearl oyster health -- the current interest in it and an overview of the cultured marine pearl industry. Pan 2 on pearl oyster health management consists of seven sections, namely: (a) introduction; (b) general information on husbandry and handling, hatchery production, introductions and transfers; (c) disease diagnostic protocols dealing with field collections of samples, gross external examination, gross internal examination and laboratory protocols; (d) health zonation; (e) disease outbreak protocols; (f) national strategies on aquatic animal health; and (g) references. Certain countries in the pearl oyster producing regions have acquired a great deal of experience in health management of cultured species. Experiences from Australia, the Cook Islands, Japan, the French Polynesia, the Philippines, China, the Persian Gulf and the Red Sea are included in Part 3 which also contains a general review of pearl oyster mortalities and disease problems.--Publisher's description.
What people are saying - Write a review
We haven't found any reviews in the usual places.
Silverlipgoldlip pearl oyster Pinctada maxima
EXPERIENCES IN DEALING WITH PEARL OYSTER MORTALITIES
1 other sections not shown
abnormal adductor muscle agar Akoya pearl Aquaculture Aquatic Animal Aquatic Animal Health Aquatic Organisms associated atolls bacteria bivalve Bivalvia black-lip pearl oyster caused Comps conchiolin conchiolin deposits Cook Islands cultured pearl diagnostic digestive gland disease outbreak Diseases of Aquatic disinfection Dybdahl effect epithelium Fish Fougerouse fouling organisms French Polynesia gonad gregarine growth hemolymph Hine Humphrey infection Invertebrate Pathology Japan Japanese pearl oyster Journal of Invertebrate Journal of Shellfish laboratory larval lesions mabe Manihiki Manihiki Lagoon mantle marine pearl mass mortality McGladdery Miyazaki molluscs nacre oyster health management oyster Pinctada fucata oyster Pinctada margaritifera oyster Pinctada maxima parasite pathogens pearl culture pearl farms pearl industry pearl oyster health pearl oyster Pinctada pearl production Penrhyn percent Perkinsus Philippines Pinctada fucata martensii Pinctada maxima Pteria Pteria penguin reported round pearls samples seawater shell shellfish Shellfish Research South Sea pearls Southgate spat Vibrio Vibrio harveyi Wada water temperature Western Australia