From Aquatic to Terrestrial Food Webs: Decrease of the Docosahexaenoic Acid/Linoleic Acid Ratio

Koussoroplis, Apostolos‐Manuel; Lemarchand, Charles; Bec, Alexandre; Desvilettes, Christian; Amblard, Christian; Fournier, Christine; Berny, Philippe; Bourdier, Gilles

doi:10.1007/s11745-008-3166-5

Cited by 49 publications

(54 citation statements)

References 37 publications

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“…Thus, our feeding trial suggests a reduction of all UFA, in particular of the n-3 fraction, when HIM is incorporated into fish diets in considerable proportions. This may point to a negative sideeffect of HIM, as the high supply of n-3 FA from marine animals is an important issue in the nutritional importance of fish (Astorg et al, 2004;Koussoroplis et al, 2008) The estimated intraperitoneal fat content as well as HSI and VSI were not influenced by the different dietary fatty acid profiles. Lock et al (2015) argue on the contrary that in Atlantic salmon HSI and VSI were higher in HIM fed fish because of increased hepatic and intraperitoneal fat content which they relate to the comparatively high content of C12:0 in HIMs and the better utilisation of this short chain FA compared to others.…”

Section: Discussionmentioning

confidence: 99%

Hermetia illucens meal as fish meal replacement for rainbow trout on farm

Stadtlander

Stamer

Buser

et al. 2017

JIFF

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In a 7-week on-farm feeding trial rainbow trout (Oncorhynchus mykiss) were provided with a diet containing 28% mechanically de-fatted insect meal prepared from larvae of the black soldier fly, Hermetia illucens (HIM) and compared to a control that received a certified organic and fishmeal based diet. In the test diet insect meal replaced almost 50% of the fishmeal. The whole experiment was conducted under practical conditions on an organically certified rainbow trout farm in Switzerland. Fish of initially 66.5±2.3 g body weight were grown to 125±4.5 g and assessed for their growth performance, as well as analysed for their proximate composition, feed conversion ratio, fatty acid contents and organoleptic properties. Improved lipid utilisation and decreased protein utilisation were observed in fish fed the HIM diet. Furthermore, in a controlled degustation no differences except a slightly darker coloration of fish fed HIM were observed. The experiment demonstrated that substantial replacement of fishmeal by insect meal is possible without compromising growth, feed conversion and product quality. However, the decreased protein utilisation efficiency in HIM fed fish might lower production efficiency when applied over a whole production cycle and not only over 7 weeks.

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Section: Discussionmentioning

confidence: 99%

Hermetia illucens meal as fish meal replacement for rainbow trout on farm

Stadtlander

Stamer

Buser

et al. 2017

JIFF

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“…Guler et al (2008) reported that the n-6/n-3 ratio of carp muscle was 2.0 in autumn, it was higher than in other seasons. In temperate zone, terrestrial organic matters containing a great abundance of n-6PUFAs were released into the freshwater and became the important elements of freshwater food webs (Koussoroplis et al 2008). …”

Section: Effects Of Diet Lipids On the Fatty Acid Content In Various mentioning

confidence: 99%

Effects of dietary lipids on tissue fatty acids profile, growth and reproductive performance of female rice field eel (Monopterus albus)

Zhou

Zhu

et al. 2010

Fish Physiol Biochem

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The effects of different lipids on tissue fatty acid profile and reproductive performance in female rice field eel were investigated in this study. Virgin female eels were fed with six diets containing different lipids (diets FO, LO, SO, PO and PL with fish oil, linseed oil, soybean oil, peanut oil and pork lard, respectively; diet APO with arachidonic acid and peanut oil). The results showed that there were positive correlations between the contents of 18:2n-6, 18:3n-3, arachidonic acid (ARA), eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) in the tissues of eels and those of the corresponding fatty acids in their diets. The specific growth rate of eels fed with diet PO was the lowest and significantly lower than that of FO and SO. Gonad of eels fed with diets PO and PL showed hypogonadism. The long chain polyunsaturated fatty acids (LC-PUFA) can be synthesized by eels, but the quantity was not enough to meet their reproduction requirement completely. The fatty acid desaturation, rather than elongation probably was one of the limiting factors. Addition of proper amount of ARA in diet was favorable to the increase of the hatching rate of fertilized eggs, while EPA and DHA in diet were beneficial to the increase of the survival rate of larva. Both n-3PUFA and a suitable n-6/n-3PUFA ratio were necessary for growth and reproduction of eels.

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“…Terrestrial organisms have a greater abundance of n-6 PUFA, e.g., linoleic acid (18:2n-6). Thus, the ratio of n-3 to n-6 PUFA can be a useful indicator of the amount of aquatic versus terrestrial food in an organism's diet (Skjervold 1992;Addis 2005;Koussoroplis et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Biochemical tracers reveal intra-specific differences in the food webs utilized by individual seabirds

Hebert

Weseloh²,

Gauthier

et al. 2009

Oecologia

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Food web structure regulates the pathways and Xow rates of energy, nutrients, and contaminants to top predators. Ecologically and physiologically meaningful biochemical tracers provide a means to characterize and quantify these transfers within food webs. In this study, changes in the ratios of stable N isotopes (e.g., 15 N), fatty acids (FA), and persistent contaminants were used to trace food web pathways utilized by herring gulls (Larus argentatus) breeding along the shores of the St Lawrence River, Canada. Egg 15 N values varied signiWcantly among years and were used as an indicator of gull trophic position. Temporal trends in egg 15 N values were related to egg FA proWles. In years when egg 15 N values were greater, egg FA patterns reXected the consumption of more aquatic prey. Egg 15 N values were also correlated with annual estimates of prey Wsh abundance. These results indicated that temporal changes in aquatic prey availability were reXected in the gull diet (as inferred from ecological tracer proWles in gull eggs). Analysis of individual eggs within years conWrmed that birds consuming more aquatic prey occupied higher trophic positions. Furthermore, increases in trophic position were associated with increased concentrations of most persistent organic contaminants in eggs. However, levels of highly brominated polybrominated diphenyl ether congeners, e.g, 2,2Ј,3,3Ј,4,4Ј,5,5Ј,6,6Ј-decabromoDE (BDE-209), showed a negative relationship with trophic position. These contrasting Wndings reXected diVerences among contaminant groups/homologs in terms of their predominant routes of transfer, i.e., aquatic versus terrestrial food webs. High trophic level omnivores, e.g., herring gulls, are common in food webs. By characterizing ecological tracer proWles in such species we can better understand spatial, temporal, and individual diVerences in pathways of contaminant, energy, and nutrient Xow.

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From Aquatic to Terrestrial Food Webs: Decrease of the Docosahexaenoic Acid/Linoleic Acid Ratio

Cited by 49 publications

References 37 publications

Hermetia illucens meal as fish meal replacement for rainbow trout on farm

Hermetia illucens meal as fish meal replacement for rainbow trout on farm

Effects of dietary lipids on tissue fatty acids profile, growth and reproductive performance of female rice field eel (Monopterus albus)

Biochemical tracers reveal intra-specific differences in the food webs utilized by individual seabirds

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