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  • 1
    Electronic Resource
    Electronic Resource
    Comparative growth and mortality of Bonamia ostreae -resistant and wild flat oysters, Ostrea edulis, in an intensive system. I. First year of experiment (1997)
    Springer
    Marine biology 130 (1997), S. 71-79 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Since the early nineteen-seventies, the parasitic protozoans Marteilia refringens and Bonamia ostreae have consistently deleteriously affected the French production of Ostrea edulis (Linné). Purification and inoculation of B. ostreae that were achieved in the late nineteen-eighties allowed a selection program to be initiated. Two O. edulis strains, S85 and S89, were raised that displayed significant resistance to B. ostreae in the field. Growth was monitored to ensure that the resistant strains grew at a rate comparable to that of controls, using two crosses between the first generation of S89 and the second generation of S85 (G1G2), and between the first generation of S89 and wild oysters (G0G1). Growth and mortality were monitored for seven consecutive months in an intensive open circulating system at the IFREMER station of Bouin (Vendée, France). A Chapman-Richards model of growth revealed that the two “resistant” crosses grew significantly better than two controls from Quiberon Bay (Brittany), an area in which B. ostreae is endemic, and Palavas (Mediterranean Sea), where oysters are less infested by this parasite. The asymptotic values for growth curves ranged between 27.2 and 28.2 g for G1G2 and G0G1 vs 21.0 and 22.8 g for the controls. There was a similar trend in mortality, with G1G2 (11.8%) surviving better than the three other populations (from 28.7 to 57.5%). B. ostreae was not detected during the experiments and mortalities were attributed to feeding conditions that were not optimal, reinforced by gametogenesis and high temperatures during the summer. It is suggested that the better performance of G1G2 and G0G1 resulted from their increased resistance to stress.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002270050226
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Sprinkling: a new method of distributing live algae food in marine coastal ponds used for Manila clam Tapes philippinarum (Adams & Reeve) intensive culture (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Aquaculture research 28 (1997), S. 0 
    Details
    ISSN: 1365-2109
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Sprinkling, an agricultural irrigation technique, has been tested for the intensive culture of Manila clams up to marketable size (35-50 mm) in coastal ponds 400 m2 in area. The sprinkling system is used for the distribution of seawater and live algal food Skeletonema costatum (Grev.) Clev. Sprinkling is a simple, low cost and efficient method of food distribution which resolves the major problem of decreasing bivalve growth associated with single point water entry in small-scale raceways. Uniform growth obtained with sprinkling is principally due to an even scattering of food over the whole surface area of large-scale ponds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2109.1997.00907.x
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  • 3
    Electronic Resource
    Electronic Resource
    Use of saline ground water for intensive rearing of Ruditapes philippinarum juveniles in a nursery system
    Amsterdam : Elsevier
    Aquaculture 88 (1990), S. 157-178 
    Details
    ISSN: 0044-8486
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0044-8486(90)90291-T
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  • 4
    Electronic Resource
    Electronic Resource
    Artificial filament breakage of the diatom Skeletonema costatum intended for mollusc aquaculture
    Amsterdam : Elsevier
    Aquaculture 123 (1994), S. 69-81 
    Details
    ISSN: 0044-8486
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0044-8486(94)90120-1
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Changes in Lipid and Fatty Acid Compositions of European Oysters Fattened with Skeletonema Costatum Diatom for Six Weeks in Ponds (1999)
    Springer
    Aquaculture international 7 (1999), S. 341-355 
    Details
    ISSN: 1573-143X
    Keywords: condition index ; diatom (Skeletonema costatum) ; European oyster (Crassostrea gigas) ; fatty acid ; glycogen ; lipid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract To improve the condition index of European oysters (Crassostrea gigas), Skeletonema costatum was fed to adult oysters. However, the consequences of this practice on compositional traits of oysters were not investigated. This study deals with the chemical changes in oysters fed with Skeletonema costatum for six weeks in ponds. The results showed that: 1. Supplying Skeletonema costatum to oysters for six weeks improved the condition index (from 26 to 56) as a consequence of an increase in glycogen content (from 5.0 to 24.4 g·100 g −1 of dry flesh) while lipid content remained steady (9.9 g·100 g−1 dry flesh). 2. Large changes in fatty acid composition of neutral lipids were observed. Some fatty acids of Skeletonema costatum such as 16:1 ω7 and 20:5 ω3, were directly accumulated into lipid fractions. 3. 16:1 ω7 was elongated into 18:1 ω7 showing that oysters are able to elongate 16 carbon mono-unsaturated fatty acids into the corresponding 18 carbon fatty acids. 4. Fatty acids typical of Skeletonema costatum (16:4 ω1, 16:2 ω4, 16:3 ω4) were poorly accumulated into neutral lipids and phospholipids of oysters suggesting that oysters discriminate these fatty acids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009244530383
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    Paper (German National Licenses)
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