Effects of crude rapeseed oil on lipid composition in Arctic charr <i>Salvelinus alpinus</i>

Pettersson, Ann; Picková, Jana; Brännäs, Eva

doi:10.1111/j.1095-8649.2009.02389.x

Cited by 15 publications

(14 citation statements)

References 30 publications

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“…In addition, FCR was lower in fish fed the F1 diet compared to all other dietary treatments. These results are in contrast to previous studies which showed no significant impact of lower dietary DHA on growth rates and/or final fish weights (Gomes et al, 1995, Guillou et al, 1995Kaushik et al, 1995;Pettersson et al, 2009) and no significant differences in FCR of farmed fish (Azevedo et al, 2004;Bendiksen et al, 2003;Karalazos et al, 2011). Many studies examining the effect of fatty acid content on final weights and weight gain were performed over relatively short time scales .…”

Section: Discussioncontrasting

confidence: 99%

Docosahexaenoic acid in Arctic charr (Salvelinus alpinus): The importance of dietary supply and physiological response during the entire growth period

Murray

Hager

Tocher

et al. 2015

Comparative Biochemistry and Physiology Part B: Biochemistry an

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The aim of this 14-month feeding study was to investigate the effects of dietary docosahexaenoic acid (DHA) on tissue fatty acid composition, DHA retention and DHA content per biomass accrual in muscle tissues of Arctic charr (Salvelinus alpinus). A control feed, formulated with a relatively high DHA inclusion level (F1), was compared with feeds containing gradually reduced amounts of DHA (Feeds F2, F3, and F4). Arctic charr were randomly distributed among 12 tanks and fed one of the feeds in triplicate. The DHA content within muscle tissues of fish fed diets F1 and F2 was generally higher compared to fish fed diets F3 and F4. However, there was an interaction between dietary DHA treatment and season, which resulted in fish muscle tissues having similar DHA contents irrespective of dietary supply during specific sampling periods. Although diets F3and F4 contained ~4-fold less DHA compared to diets F1 and F2, retention of DHA in dorsal and ventral muscle tissue was up to 5-fold higher relative to the diet content in fish fed diets F3 and F4. However, the difference among treatments was dependent on the month sampled. In addition, younger fish retained DHA more efficiently compared to older fish. DHA (µg DHA/g/day) accrual in muscle tissue was independent of somatic growth, and there was no difference among treatments. The results suggested that dietary DHA may be essential throughout the lifecycle of Arctic charr and that the DHA content of muscle tissues was influenced by diet and metabolic/physiological factors, such as specific DHA retention during the entire growth cycle . Finally, this long-term feeding study in Arctic charr indicated a non-linear function in DHA retention in dorsal and ventral muscle tissues throughout the lifecycle, which varied in its relationship to dietary DHA.

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Section: Discussioncontrasting

confidence: 99%

Docosahexaenoic acid in Arctic charr (Salvelinus alpinus): The importance of dietary supply and physiological response during the entire growth period

Murray

Hager

Tocher

et al. 2015

Comparative Biochemistry and Physiology Part B: Biochemistry an

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“…; Pettersson et al . ). On the other hand, soy alcohol extract obtained as a by‐product of soy protein concentrate production and considered to contain the saponin + phytosterol fraction of full fat soybean meal, has been reported to reduce feed intake and growth in Atlantic salmon, Chinook salmon and rainbow trout (van den Ingh et al .…”

Section: Discussionmentioning

confidence: 97%

“…Similarly, in Artic charr fed diets with rapeseed oil replacing 25%, 50% and 75% of fish oil (sitosterol levels of 0.4, 0.7 and 1.1 g kg −1 lipids in the diets, respectively), cholesterol levels in white muscle were decreased only at 25% and 50% fish oil replacement levels, while the control and the diet with 75% rapeseed oil had similar cholesterol values (Pettersson et al . ). This may be due to compensation of the reduced cholesterol levels by enhanced endogenous synthesis.…”

Section: Discussionmentioning

confidence: 97%

Saponins and phytosterols in diets for European sea bass (Dicentrarchus labrax) juveniles: effects on growth, intestinal morphology and physiology

et al. 2014

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This study aimed to elucidate the effects of two soy antinutrients, saponins and phytosterols, on growth, intestinal health and function of European sea bass juveniles. Seven fishmeal-based diets were formulated: a control diet without antinutrients and six experimental diets containing low or high levels of soyasaponins (SapL and SapH, respectively), low or high levels of phytosterols (PhytL and PhytH, respectively) and low or high levels of soyasaponins + phytosterols (SapPhytL and SapPhytH, respectively). A feeding trial was conducted for 59 days after which blood was collected for plasmatic cholesterol quantification and intestinal samples were collected for histology, digestive enzymes activity and gene expression analysis. Histology was also performed at day 15. PhytL resulted in high distal intestine (DI) relative weight and decreased plasma cholesterol, while PhytH caused inflammatory changes in the DI. SapH depressed maltase and alkaline phosphatase activity in DI and the histological evaluation indicated some inflammatory changes. The SapPhytH resulted in decreased maltase activity in the DI and indications of inflammatory changes that were supported by the results on gene expression profiles. The antinutrients tested did not compromise growth, however, caused some gastrointestinal disturbance that may affect fish in the long term.

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“…For example, the harvest of rich populations of sprat (Sprattus sprattus) and herring (Clupea harengus) in the Baltic Sea could remove more than 1,000 tons of phosphorous and 7,000 tons of nitrogen (Kiessling, 2009). Development of a feed based on sustainable ingredient for Arctic charr, such as single cell organisms, mussels, plant oils, etc., without reducing the quality of the fish for human consumption is another important field of research (Pettersson et al, 2009;Kiessling, 2009). …”

Section: Towards a Subarctic Aquaculture Industry In Sweden?mentioning

confidence: 99%

The Arctic charr story: development of subarctic freshwater fish farming in Sweden

et al. 2010

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We present an overview of 27 years of experience of domestication and farming of Arctic charr (Salvelinus alpinus) in Sweden. The domestication process included an evaluation of suitable strains for farming, a breeding programme and the study of the biological and behavioural characteristics of the species. Traits of three different Arctic charr populations differing in ecology and appearance were compared during initial 2-year trials under farming conditions. The best-performing population with respect to the growth rate and the lowest frequency of early sexual maturation was a piscivore form and this became the foundation for a breeding programme intended to select for an Arctic charr strain suitable for farming. After 23 years and 7 generations, our selective breeding has resulted in a fast-growing, late-maturing strain much appreciated by farmers. The biological and behavioural characteristics studied included annual and diel locomotor activity, feeding, social and thermal behaviour. Applying our findings in these areas has greatly improved both profits and conditions for the fish.Other investigations have focused on the application and further evaluation of the results from research in practical farming trials, such as evaluation of growth at different farms with different temperature conditions, optimal time and stocking density for startfeeding and evaluation of different feeding schedules. In Sweden, Arctic charr is mainly farmed in net pens situated in nutritionally depleted and extremely unproductive water reservoirs formed by damming rivers to create electric power. Judicious farming of Arctic charr in such reservoirs can restore their nutritional and productivity state to that which existed before regulation. Site selection criteria for Arctic charr farming in such waters have been developed. The development of intensive farming of Arctic charr in Sweden is discussed together with current limitations and future possibilities.

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Effects of crude rapeseed oil on lipid composition in Arctic charr Salvelinus alpinus

Cited by 15 publications

References 30 publications

Docosahexaenoic acid in Arctic charr (Salvelinus alpinus): The importance of dietary supply and physiological response during the entire growth period

Docosahexaenoic acid in Arctic charr (Salvelinus alpinus): The importance of dietary supply and physiological response during the entire growth period

Saponins and phytosterols in diets for European sea bass (Dicentrarchus labrax) juveniles: effects on growth, intestinal morphology and physiology

The Arctic charr story: development of subarctic freshwater fish farming in Sweden

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