Food spectrum and trophic position of an Arctic cephalopod, Rossia palpebrosa (Sepiolida), inferred by stomach contents and stable isotope (δ13C and δ15N) analyses

Golikov, Alexey V.; Ceia, Filipe R.; Sabirov, Rushan M.; Belyaev, A. N.; Blicher, Martin E.; Arboe, Nanette Hammeken; Zakharov, Denis V.; Xavier, José C.

doi:10.3354/meps13152

Cited by 9 publications

(19 citation statements)

References 54 publications

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“…Eight specimens of all groups were randomly selected for SIA but all specimens were taken if less than n = 8 existed in any group (Tables 2 , 3 , Supplementary Tables S1 – S4 ). Some of R. palpebrosa samples ( n = 37) were used in recent SIA study of species’ stomach contents 41 .…”

Section: Methodsmentioning

confidence: 99%

“…Lower beaks were taken for SIA, as they have been repeatedly used in related studies (e.g. 41 , 42 , 52 – 54 ), and their rostrums measured ( n = 133).…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, this value was subtracted from muscle δ 15 N values available in the literature to enable comparison with the data reported here. However, when estimating TL, we added 4.8‰ to raw beak δ 15 N values, as proposed by 41 , 42 , 52 , 54 .…”

Section: Methodsmentioning

confidence: 99%

“…mean value of C. glacialis ; Golikov et al, unpubl.). Interpretation of TLs in the Arctic ecosystems followed recent stable isotope studies of the area 41 , 42 , 60 , 64 – 67 .…”

Section: Methodsmentioning

confidence: 99%

“…All three species are nekto-benthic and hunt as ambush predators, attacking only live prey 36 , 44 . However, very little information is available about their diet 48 , apart from the most abundant species, R. palpebrosa , whose diet was recently studied 41 . These species are sympatric in some areas of the Arctic (Table 1 ), and have similar sizes and supposedly similar hunting behavior.…”

Section: Introductionmentioning

confidence: 99%

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Diet and life history reduce interspecific and intraspecific competition among three sympatric Arctic cephalopods

Golikov

Ceia

Sabirov

et al. 2020

Sci Rep

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Trophic niche and diet comparisons among closely sympatric marine species are important to understand complex food webs, particularly in regions most affected by climate change. Using stable isotope analyses, all ontogenetic stages of three sympatric species of Arctic cephalopods (genus Rossia) were studied to assess inter- and intraspecific competition with niche and diet overlap and partitioning in West Greenland and the Barents Sea. Seven traits related to resource and habitat utilization were identified in Rossia: no trait was shared by all three species. High boreal R. megaptera and Arctic endemic R. moelleri shared three traits with each other, while both R. megaptera and R. moelleri shared only two unique traits each with widespread boreal-Arctic R. palpebrosa. Thus all traits formed fully uncrossing pattern with each species having unique strategy of resource and habitat utilization. Predicted climate changes in the Arctic would have an impact on competition among Rossia with one potential ‘winner’ (R. megaptera in the Barents Sea) but no potential ‘losers’.

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Section: Methodsmentioning

confidence: 99%

“…Lower beaks were taken for SIA, as they have been repeatedly used in related studies (e.g. 41 , 42 , 52 – 54 ), and their rostrums measured ( n = 133).…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…mean value of C. glacialis ; Golikov et al, unpubl.). Interpretation of TLs in the Arctic ecosystems followed recent stable isotope studies of the area 41 , 42 , 60 , 64 – 67 .…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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