Meta-analysis of factors associated with omega-3 fatty acid contents of wild fishстатья
Статья опубликована в высокорейтинговом журнале
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 10 августа 2018 г.
Аннотация:Fish are recognized as the main source of
physiologically important omega-3 long-chain
polyunsaturated fatty acids, namely, eicosapentaenoic
acid (EPA) and docosahexaenoic acid (DHA), for
human nutrition. However, muscle tissue contents of
these fatty acids in diverse fish species, i.e., their
nutritive value for humans, varied within two orders of
magnitude. We reviewed contents of EPA and DHA,
measured by similar methods using an internal standard
during chromatography as mg per g of wet mass
in 172 fish species belonging to 16 orders, to evaluate
probable variations in phylogenetic and ecological
drivers. EPA ? DHA content varied from
25.6 mg g-1 of wet mass (Sardinops sagax) to
0.12 mg g-1 (Gymnura spp.). Multidimensional
redundancy analysis revealed that among phylogenetic,
ecomorphological and abiotic environmental
factors, the highest proportion of variation contribution
belonged to the shared contribution of sets of
phylogenetic and ecomorphological factors. Specifically,
the highest values of EPA ? DHA content were
characteristic of fish belonging to the orders Clupeiformes
or Salmoniformes, were pelagic fast swimmers,
ate zooplankton and inhabited marine waters or
migrated from fresh to marine waters (anadromous
migrations). High EPA and DHA content in muscle
tissues of the above species appeared to be a metabolic
adaptation for fast continuous swimming. In contrast
to common beliefs, our meta-analysis did not support
the significant influence of higher trophic levels
(piscivory) and cold environments (homeoviscous
adaptation) on EPA and DHA content in fish. However,
many causes of high and low levels of physiologically
important fatty acids in certain fish species
remained unexplained and require evaluation in future
studies.