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  • 1995-1999  (3)
  • 1999  (3)
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  • 1995-1999  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Ascorbic acid and α-tocopherol levels in larvae of Atlantic halibut before and after exogenous feeding (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 55 (1999), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Ascorbic acid (AA) and α-tocopherol (α-TOH) levels in whole Atlantic halibut larvae were constant during the yolk sac stage at 170 and 131 ng individual−1, respectively. At hatching c. 80% of the AA and 97% of the α-TOH were contained within the yolk-sac compartment. With development, AA and α-TOH levels in the yolk decreased, at different rates. At first feeding (at 200 day degrees post hatch, D°PH)〉95% of AA but 〈30% of α-TOH in the yolk at hatching had been transferred to the larval body. Transfer of α-TOH was completed at 360 D°PH, when the yolk was completely absorbed. The plankton offered to the larvae at first feeding (chiefly Temora longicornis) contained 756 μg g−1 AA and 120 μg g−1α-TOH (dry weight). The AA content increased to 472 ng individual−1 within one week after first feeding, while it declined slightly in unfed larvae. In fed larvae the AA content reached c. 3500 ng individual−1 at 580 D)PH. The α-TOH content increased only slightly in the first week of feeding (206 to 431 D°PH), but then increased to 〉 800 ng individual−1 at 483 D°PH.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1999.tb00713.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Textural Properties of Raw Salmon Fillets as Related to Sampling Method (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 64 (1999), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Textural properties of raw Atlantic salmon (Salmo salar) fillets from different origin were studied on different locations of the fillets. Three instrumental methods were applied for evaluation of textural properties. Two methods were based on puncture tests, using flat-ended cylinder or spherical probes measuring the hardness of the fillet. The third method was based on cutting the fillet with a blade and measuring the shear force. Hardness and shear force increased from head to tail, and the location below the dorsal fin was found to be most reliable. The shear force method was found to be more sensitive than the puncture methods and best suited for practical application.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1999.tb09869.x
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    The influence of temperature, dietary polyunsaturated fatty acids, α-tocopherol and spermine on fatty acid composition and indices of oxidative stress in juvenile Arctic char, Salvelinus alpinus (L.) (1999)
    Springer
    Fish physiology and biochemistry 20 (1999), S. 13-29 
    Details
    ISSN: 1573-5168
    Keywords: blood chemistry ; haematology ; lipid nutrition ; lipid peroxidation ; low temperature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Juvenile Arctic char, Salvelinus alpinus (L.), were fed two levels of polyunsaturated fatty acids (PUFA) (5.5 or 2.5% of diet (37 or 16% of lipid respectively)), α-tocopheryl acetate (70 or 300 mg kg−1 diet) and the antioxidant spermine (0 or 250 mg kg−1 diet) in a 3×2 factorial design and analysed for tissue fatty acid composition and indices of oxidative stress. The effect of temperature was evaluated by first maintaining the fish at 12 °C for 70 days and then 0.6 °C for 71  days. Liver and muscle fatty acid compositions were significantly influenced by the fatty acid compositions of the feed, although extensive modification of some fatty acids took place prior to deposition in the tissues. Maintaining char at low temperature increased liver PUFA content particularly in fish fed the low PUFA diets while no major changes were seen in muscle. Tissue α- tocopherol deposition was mainly influenced by dietary α- tocopheryl acetate. Dietary spermine had no influence on tissue levels of spermine. Dietary manipulation had no major influence on haematology and blood chemistry. High dietary PUFA increased the content of thiobarbituric acid reactive substances (TBARS) in both liver and muscle. Neither α-tocopheryl acetate nor spermine influenced tissue TBARS content. Lowering the environmental temperature influenced several parameters including haematology, blood chemistry and muscle spermine content, but none were related to diet. It is concluded that Arctic char is tolerant to a wide range of dietary content of PUFA (16 to 37% of lipid) and α- tocopherol (70 to 300 mg kg−1), and that spermine offers no further protection against oxidative stress. It is suggested that toxic levels of PUFA is related to the amount in dietary lipid where more than 50% of lipid may be harmful to the fish.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007767827996
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    Paper (German National Licenses)
    Fulltext
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