Effects of feeding level and sexual maturation on fatty acid composition of energy stores in diploid and triploid rainbow trout (Oncorhynchus mykiss)

Manor, Meghan L.; Weber, Gregory M.; Cleveland, Beth M.; Kenney, P. Brett

doi:10.1016/j.aquaculture.2013.09.023

Cited by 41 publications

(51 citation statements)

References 26 publications

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“…Moreover, higher percentage of EPA and DHA in mature diploids compared to that of triploids, found by other authors (Flajshans et al, 2010;Ozorio et al, 2012;Manor et al, 2012Manor et al, , 2014Ribeiro et al, 2012), was confirmed in our study. It should be emphasized, that immature diploid fish did not differ significantly from triploids concerning EPA and DHA percentage.…”

Section: Discussionsupporting

confidence: 92%

“…Fatty acid composition of the pink salmon obtained in this study was close to that of another species of salmonid, Oncorhynchus mykiss (rainbow trout), reared in aquaculture (Ribeiro et al, 2012;Manor et al, 2014). Moreover, higher percentage of EPA and DHA in mature diploids compared to that of triploids, found by other authors (Flajshans et al, 2010;Ozorio et al, 2012;Manor et al, 2012Manor et al, , 2014Ribeiro et al, 2012), was confirmed in our study.…”

Section: Discussionsupporting

confidence: 89%

“…Due to are sterile and at adult stages exhibit better growth than their diploid counterparts, because the 53 sterility prevents energy loss for gamete production and negative effects of sexual maturation for 54 meat quality (Flajshans et al, 2010;Ozorio et al, 2012).Moreover, the use of sterile triploids in aquaculture can reduce the risks of propagation of non-native escapees into the wild (Ozorio et al, 2012;Ribeiro, Gomes, Vieira, Tabata, Takahashi, & Moreira, 2012). Nevertheless, in spite of the better fillet quality of triploids because of the prevention of mobilization of stored lipids for gonad development, they were reported to have a lesser sum of PUFA in the flesh compared to diploid individuals (Flajshans et al, 2010;Ozorio et al, 2012;Manor, Weber, Salem, Yao, Aussanasuwannakul, & Kenney, 2012;Ribeiro et al, 2012;Manor, Weber, Cleveland, & Kenney, 2014). Therefore, it was suggested to improve PUFA content in muscle of triploids by dietary supplementation of PUFA (Ribeiro et al, 2012).…”

mentioning

confidence: 99%

“…Oncorhynchus mykiss are often used and their fatty acid composition is studied (Ozorio et al, 2012;Manor et al, 2012Manor et al, , 2014Ribeiro et al, 2012). Studies of other salmonid species are also desirable to expand and clarify data on nutritive quality of triploid fish.…”

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confidence: 99%

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Triploidy does not decrease contents of eicosapentaenoic and docosahexaenoic acids in filets of pink salmon Oncorhynchus gorbuscha

et al. 2017

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Triploid fish has become an important item of commercial aquaculture, but data on its fatty acid (FA) composition are still controversial, especially regarding essential polyunsaturated fatty acids, eicosapentaenoic acid (20:5n-3, EPA) and docosahexaenoic acid (22:6n-3, DHA).We studied FA composition and content of diploid and triploid pink salmon Oncorhynchus gorbuscha, reared in aquaculture in a bay of the White Sea (Russia). FA composition, measured as percentages of total FA of triploids and immature diploid females significantly differed from

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Section: Discussionsupporting

confidence: 92%

Section: Discussionsupporting

confidence: 89%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Triploidy does not decrease contents of eicosapentaenoic and docosahexaenoic acids in filets of pink salmon Oncorhynchus gorbuscha

et al. 2017

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“…steelhead) to harvest sizes >2 kg [4]; however, research that clearly defines growth performance and quality of larger trout is limited, particularly for trout cultured in recirculating systems. Several studies have evaluated fillet quality attributes for large, sexually maturing rainbow trout [4][5][6][7][8][9][10]. Most of these studies were focused on physiology during reproduction, were conducted using flow through systems, and did not thoroughly describe rainbow trout growth and fillet quality with age/time.…”

Section: Introductionmentioning

confidence: 99%

Growth Performance, Fillet Quality, and Reproductive Maturity of Rainbow Trout (Oncorhynchus mykiss) Cultured to 5 Kilograms within Freshwater Recirculating Systems

PB¹

2014

J Aquac Res Development

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Rainbow trout are commonly cultured within aquaculture systems to one pound or less and marketed as pansized fillets. Production of larger rainbow trout provides a distinguishable product. Research that describes the growth performance and fillet quality of large rainbow trout is limited, particularly for trout cultured in recirculating aquaculture systems. A study was conducted evaluating the growth performance and fillet quality attributes of allfemale rainbow trout reared using freshwater recirculating systems operated at a mean water temperature of 13°C, under constant lighting, and with around-the-clock feeding. Rainbow trout grew to 4.8 kg in 22 months post-hatch. Growth rates declined with the onset of reproductive maturity. Rainbow trout weighed 5.2 kg at 26 months. The mean ratio of feed provided to biomass gain was 1.36:1 from first feeding to 22 months but increased substantially from 23-25 months. As rainbow trout approached reproductive maturity, 10 fish were collected at specified intervals for assessment of fillet quality attributes. Fillet yield peaked at 20-22 months when trout were 3.8-4.8 kg. Cook yield, cooked fillet firmness, and crude fat decreased; while fillet moisture and raw fillet firmness increased from 24-26 months. Changes in fillet quality coincided with reduced growth rates, decreased feed efficiency, and increasing gonadosomatic index. Two principal components were identified that explained more than 73% of the variation in growth and fillet attribute responses: principal component 1, the growth variable (length, weight, fillet thickness, belly flap thickness, and cook yield) and principal component 2, the quality variable (fillet moisture, fillet fat, and cooked fillet firmness). This research provides rainbow trout growth performance and fillet quality results that can be referenced for the development of recirculating system production plans and for selection of harvest endpoints that balance the requirements of fish farmers and the food industry sector.

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Among‐individual diet variation within a lake trout ecotype: Lack of stability of niche use

Chavarie

Howland

Harris

et al. 2021

Ecology and Evolution

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In a polyphenic species, differences in resource use are expected among ecotypes, and homogeneity in resource use is expected within an ecotype. Yet, using a broad resource spectrum has been identified as a strategy for fishes living in unproductive northern environments, where food is patchily distributed and ephemeral. We investigated whether specialization of trophic resources by individuals occurred within the generalist piscivore ecotype of lake trout from Great Bear Lake, Canada, reflective of a form of diversity. Four distinct dietary patterns of resource use within this lake trout ecotype were detected from fatty acid composition, with some variation linked to spatial patterns within Great Bear Lake. Feeding habits of different groups within the ecotype were not associated with detectable morphological or genetic differentiation, suggesting that behavioral plasticity caused the trophic differences. A low level of genetic differentiation was detected between exceptionally large‐sized individuals and other piscivore individuals. We demonstrated that individual trophic specialization can occur within an ecotype inhabiting a geologically young system (8,000–10,000 yr BP), a lake that sustains high levels of phenotypic diversity of lake trout overall. The characterization of niche use among individuals, as done in this study, is necessary to understand the role that individual variation can play at the beginning of differentiation processes.

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Effects of feeding level and sexual maturation on fatty acid composition of energy stores in diploid and triploid rainbow trout (Oncorhynchus mykiss)

Cited by 41 publications

References 26 publications

Triploidy does not decrease contents of eicosapentaenoic and docosahexaenoic acids in filets of pink salmon Oncorhynchus gorbuscha

Triploidy does not decrease contents of eicosapentaenoic and docosahexaenoic acids in filets of pink salmon Oncorhynchus gorbuscha

Growth Performance, Fillet Quality, and Reproductive Maturity of Rainbow Trout (Oncorhynchus mykiss) Cultured to 5 Kilograms within Freshwater Recirculating Systems

Among‐individual diet variation within a lake trout ecotype: Lack of stability of niche use

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