Feeding spectra of Arctodiaptomus salinus (Calanoida, Copepoda) using fatty acid trophic markers in seston food in two salt lakes in South Siberia (Khakasia, Russia)

Толомеев, А. П.; Sushchik, Nadezhda N.; Gulati, R. D.; Makhutova, Olesia N.; Калачева, Г. С.; Зотина, Т. А.

doi:10.1007/s10452-010-9331-y

Cited by 23 publications

(6 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Wax esters are accumulated slowly and could be involved in metabolic processes as a last energy resource, later than other lipids, probably allowing calanoid copepods to keep positive buoyancy during longterm diapause. Estuarine and freshwater copepods (including Arctodiaptomus salinus and Calanipeda aquaedulcis) accumulate mainly triacylglycerols in the form of droplets distributed in the body (Ventura & Catalan 2005, Tolomeev et al 2010. However, in contrast to wax esters, triacylglycerols can be rapidly synthesized during feeding and utilized at starvation, thus influencing the body mass density.…”

Section: Mass Density and Dry Weight Changes During Starvation In Calmentioning

confidence: 99%

Calanipeda aquaedulcis and Arctodiaptomus salinus are exceptionally euryhaline osmoconformers: evidence from mortality, oxygen consumption, and mass density patterns

Svetlichny¹,

Hubareva²,

Khanaychenko³

2012

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Mortality, respiration rate, and body mass density of the estuarine copepods Calanipeda aquaedulcis and Arctodiaptomus salinus and their eggs were studied over a wide range of salinities. Empirical hydrodynamic modeling was applied to calculate body mass density using the sinking speed of the copepods. According to the index of median lethal salinity (LS 50 ), the salinity tolerance ranges of C. aquaedulcis and A. salinus reared at 18 psu were 0.1 to 50 and 0.1 to 35 psu, respectively. No significant effect of salinity on the specific oxygen consumption rate was found in the range from 0.1 to 40 psu in both species, while mean body mass density increased iso-osmotically with water salinity from (mean ± SD) 1.053 ± 0.007 to 1.077 ± 0.005 g cm −3 in C. aquaedulcis and from 1.039 ± 0.004 to 1.062 ± 0.007 g cm −3 in A. salinus. However, body density contrast and sinking speed were stable in both species, allowing them to avoid buoyancy problems with changing salinity. The mean mass density of resting eggs in A. salinus gradually increased isoosmotically following gradual changes in salinity. In contrast to resting eggs, the mass density of subitaneous eggs was not altered by changes in the surrounding salinity, suggesting a hysteresis response in these eggs.

show abstract

Section: Mass Density and Dry Weight Changes During Starvation In Calmentioning

confidence: 99%

Calanipeda aquaedulcis and Arctodiaptomus salinus are exceptionally euryhaline osmoconformers: evidence from mortality, oxygen consumption, and mass density patterns

Svetlichny¹,

Hubareva²,

Khanaychenko³

2012

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

show abstract

“…Moreover, in Lake Shunet, large crustacean filter-feeding zooplankters such as Daphnia are conspicuous by their absence: the main grazers, instead, are the calanoid Arctodiaptomus salinus and the rotifers Brachionus plicatilis and Hexarthra oxiuris. The consumption of Cryptomonas by A.salinus is supported by direct feeding experiments and presence of fatty acid trophic markers (Tolomeev et al 2010). However, since these grazers cannot stay for a long time in the anaerobic water, this allows Cryptomonas to recoup and maintain their population in this zone.…”

Section: Stratification Of Phytoflagellates and Ciliatesmentioning

confidence: 99%

Vertical stratification of physical, chemical and biological components in two saline lakes Shira and Shunet (South Siberia, Russia)

et al. 2010

View full text Add to dashboard Cite

A feature of meromictic lakes is that several physicochemical and biological gradients affect the vertical distribution of different organisms. The vertical stratification of physical, chemical and biological components in saline, fishless meromictic lakes Shira and Shunet (Siberia, Russia) is quite different mainly because both mean depth and maximum depth of lakes differ as well as their salinity levels differ. The chemocline of the Lake Shira, as in many meromictic lakes, is inhabited by bacterial community consisting of purple sulphur and heterotrophic bacteria. As the depth of the chemocline is variable, the bacterial community does not attain high densities. The mixolimnion in Lake Shira, which is thermally stratified in summer, also creates different habitat for various species. The distribution of phytoplankton is non-uniform with its biomass peak in the metalimnion. The distribution of zooplankton is also heterogeneous with rotifers and juvenile copepods inhabiting the warmer epilimnion and older copepods found in the cold but oxic hypolimnion. The amphipod Gammarus lacustris which can be assigned to the higher trophic link in the fishless lake's ecosystem, such as Lake Shira, is also distributed non-uniformly, with its peak density generally observed in the thermocline region. The chemocline in Lake Shunet is located at the depth of 5 m, and unlike in Lake Shira, due to a sharp salinity gradient between the mixolimnion and monimolimnion, this depth is very stable. The mixolimnion in Lake Shunet is relatively shallow and the chemocline is inhabited by (1) an extremely dense bacterial community; (2) a population of Cryptomonas sp.; and (3) ciliate community comprising several species. As the mixolimnion of Lake Shunet is not thermally stratified for long period, the phytoplankton and zooplankton populations are not vertically stratified. The gammarids, however, tend to concentrate in a narrow layer located 1-2 m above the chemocline. We believe that in addition to vertical inhomogeneities of both physicochemical parameters, biological and physical factors also play a role in maintaining these inhomogeneities. We conclude that the 123Aquat Ecol (2010) 44:619-632 DOI 10.1007 stratified distributions of the major food web components will have several implications for ecosystem structure and dynamics. Trophic interactions as well as mass and energy flows can be significantly impacted by such heterogeneous distributions. Species spatially separated even by relatively short distances, say a few centimetres will not directly compete. Importantly, we demonstrate that not only bacteria, phytoflagellates and ciliate tend to concentrate in thin layers but also larger-sized species such Gammarus (amphipods) can also under certain environmental conditions have stratified distribution with maxima in relatively thin layer. As the vertical structure of the lake ecosystem is rather complex in such stratified lakes as ours, the strategy of research, including sampling techniques, should consider potentially var...

show abstract

“…An experimental study on the diet of G. lacustris from Lake Shira also revealed consumption of the rotifer Brachionus plicatilis and the copepod A. salinus by these gammarids (Yemelyanova et al 2002). The calanoid copepod A. salinus has high percentages of DHA (up to 17% of total FAs) and is a dominant zooplankton species in lakes Shira and Shunet (Tolomeev et al 2010). Our previous work demonstrated that seston (primarily phytoplankton) and benthic biofilms (primarily phytobenthos) from Lake Shira were poor in DHA while the bodies of G. lacustris had high percentages (8.6%) of DHA (Makhutova et al 2003).…”

Section: Discussionmentioning

confidence: 99%

“…Salinity affects the activity of enzymes involved in the synthesis of PUFAs, leading to an increase in the DHA/EPA and polyunsaturated FAs/saturated FAs (PUFA/SFA) ratios in marine fish and invertebrates (Guermazi et al 2008, Fokina et al 2010, Tolomeev et al 2010, Sarker et al 2011, Fonseca-Madriqal et al 2012, Dantagnan et al 2013. Thus, another reason for high percentages of DHA in the populations of G. lacustris from saline lakes Shira and Shunet might be an adaptation of this species to high salinity.…”

Section: Discussionmentioning

confidence: 99%

Intraspecies variability of fatty acid content and composition of a cosmopolitan benthic invertebrate,Gammarus lacustris

et al. 2018

View full text Add to dashboard Cite

Aquatic invertebrates are valuable dietary sources of essential polyunsaturated fatty acids, eicosapentaenoic acid (EPA, 20:5n-3) and docosahexaenoic acid (DHA, 22:6n-3), for fish. Phylogeny, diet, and various ecological factors affect the fatty acid composition of aquatic invertebrates. We focused our study on the effect of ecological factors to a cosmopolitan species inhabiting lakes that differed in salinity, temperature, and presence/absence of predators (fish). To avoid the effect of phylogeny, which strongly influences the fatty acid composition of animals, we studied several populations of one cosmopolitan benthic species, Gammarus lacustris Sars. We found that differences in fatty acid percentages of G. lacustris were mainly affected by differences in their diets. Some populations preferred dinoflagellates, cryptophytes, green algae/cyanobacteria, and bacteria; other populations selected diatoms; and still other populations consumed zooplankton or allochthonous (terrestrial) organic matter. Примечание [U1]: The name of the Institute has been changed already. So this is the new name The salinity and presence/absence of fish affected the contents of EPA and DHA in G. lacustris. Populations from saline and fishless lakes had significantly higher contents of EPA and DHA. Thus, stocking of fishless lakes dominated by G. lacustris with fish could lead to a decrease in EPA and DHA contents in the gammarids. We propose that some saline and fishless lakes could be used as a source of gammarids for aquaculture fish feeding.

show abstract

Feeding spectra of Arctodiaptomus salinus (Calanoida, Copepoda) using fatty acid trophic markers in seston food in two salt lakes in South Siberia (Khakasia, Russia)

Cited by 23 publications

References 63 publications

Calanipeda aquaedulcis and Arctodiaptomus salinus are exceptionally euryhaline osmoconformers: evidence from mortality, oxygen consumption, and mass density patterns

Calanipeda aquaedulcis and Arctodiaptomus salinus are exceptionally euryhaline osmoconformers: evidence from mortality, oxygen consumption, and mass density patterns

Vertical stratification of physical, chemical and biological components in two saline lakes Shira and Shunet (South Siberia, Russia)

Intraspecies variability of fatty acid content and composition of a cosmopolitan benthic invertebrate,Gammarus lacustris

Contact Info

Product

Resources

About