Journal ArticleDOI
Comparison of fatty acids and lipids of smolting hatchery-fed and wild atlantic salmon Salmo salar
Robert G. Ackman,Toshio Takeuchi +1 more
TLDR
Results suggest that the smolt lipid, is involved intimately with either the cause of the dermal lesion or is a defense mechanism, possibly mediated through oxygenase activity.Abstract:
In Atlantic Canada the Atlantic salmonSalmo salar change from the parr stage to the smolt stage while still in fresh water, preparatory to migration to salt water. In some stocks this takes place during the second overwintering. In several hatcheries where the water temperature drops to 0–0.5 C and the ponds ice over, there is a high incidence of erosion of the dorsal and pectoral fins and sometimes of the caudal fin. No disease organism has been identified, and the lesions heal over in most cases. Dietary fatty acids were thought, to be a factor. A detailed study of lipid recoveries and classes has shown that in the skins of abnormal fish the total lipid, is 7.8% compared to 4.7% in control fish.read more
Citations
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Journal ArticleDOI
The lipid composition and biochemistry of freshwater fish.
R.J. Henderson,Douglas R. Tocher +1 more
Journal ArticleDOI
Differentiation of cultured and wild sea bass (Dicentrarchus labrax): total lipid content, fatty acid and trace mineral composition
TL;DR: Cultured and wild sea bass may be differentiated using total lipid content, fatty acid proportions and trace mineral compositions and these differences may be attributed to the constituents of the diet of the fish.
Journal ArticleDOI
Composition, accumulation and utilization of yolk lipids in teleost fish
TL;DR: The results of this type of study provide an explanation for the selection pressures that influence yolk lipid composition and future work ought to expand knowledge of specific roles of individual fatty acids in embryos along with knowledge of the ecological physiology of ovarian recrudescence, environmental influences on vitellogenin and y egg lipid composition, and the control of yolks lipid accumulation and utilization.
Book ChapterDOI
Fatty Acids as Trophic and Chemical Markers in Freshwater Ecosystems
TL;DR: Pimm et al. as mentioned in this paper investigated the trophic relationships between aquatic organisms using biochemical, immunological, and stable isotope analyses to identify sources and sinks of organic matter for understanding the dynamics of aquatic ecosystems.
References
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Journal ArticleDOI
Lipid nutrition in fish
TL;DR: Results of studies on the energy requirements of fish during recent years have indicated that in the carnivorous fish such as rainbow trout, eel, yellowtail and plaice which have limited ability to utilize carbohydrates of high mol, dietary lipids play an important role in this respect and have a sparing action on dietary protein.
Journal ArticleDOI
The parr-smolt transformation (smoltification) and seawater adaptation in salmonids a review of selected literature
TL;DR: This review provides fishery biologists and fish culturists with a summary of those published reports relating to the morphological, behavioral and biochemical changes associated with smoltification and seawater adaptation in anadromous salmonids.
Journal ArticleDOI
The effects of temperature and ration size on the growth and energetics of salmonids in captivity
TL;DR: Although many factors can influence the growth of salmonids, it is generally agreed that fish size, water temperature and the level of energy intake (ration size) are the three most important independent variables.
Journal ArticleDOI
Lipid mobilization during starvation in the rainbow trout, Salmo gairdneri Richardson, with attention to fatty acids
TL;DR: Rainbow trout, Salmo gairdneri, were fed pelleted food ad libitum for 35 and 50 days, and visceral lipid contributed most to energy metabolism among the depots investigated, and the U/S ratio rose in viscera and liver and decreased in muscle.
Journal ArticleDOI
Precocious sexual maturation and smoltification in male Atlantic salmon (Salmo salar)
TL;DR: Hatcher-reard, precociously mature, yearling male parr survived and grew as well as immature individuals under two temperature-photoperiod regimes and Trends in lipid-moisture dynamics and condition factor of mature and immature individuals followed typical sea-sonal patterns during smolting.