Benthic-pelagic trophic interactions within the fish assemblage in the western Bering Sea shelf area according to stomach content analysis and ratios of C and N stable isotopes

Горбатенко, К. М.; Kiyashko, S. I.; Lazhentsev, A. Ye.; Nadtochii, V. A.; Savin, A. B.

doi:10.1134/s1063074008070092

Cited by 12 publications

(3 citation statements)

References 6 publications

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“…adult pollock and Pacific herring) are higher than prey species commonly found in the off-shelf habitat (e.g. northern smoothtongue and squid; [ 25 , 83 , 87 – 89 ]).…”

Section: Discussionmentioning

confidence: 99%

Stable Isotope Models Predict Foraging Habitat of Northern Fur Seals (Callorhinus ursinus) in Alaska

et al. 2015

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We developed models to predict foraging habitat of adult female northern fur seals (Callorhinus ursinus) using stable carbon (δ13C) and nitrogen (δ15N) isotope values from plasma and red blood cells. Binomial generalized linear mixed models were developed using blood isotope samples collected from 35 adult female fur seals on three breeding colonies in Alaska during July-October 2006. Satellite location and dive data were used to define habitat use in terms of the proportion of time spent or dives made in different oceanographic/bathymetric domains. For both plasma and red blood cells, the models accurately predicted habitat use for animals that foraged exclusively off or on the continental shelf. The models did not perform as well in predicting habitat use for animals that foraged in both on- and off-shelf habitat; however, sample sizes for these animals were small. Concurrently collected scat, fatty acid, and dive data confirmed that the foraging differences predicted by isotopes were associated with diet differences. Stable isotope samples, dive data, and GPS location data collected from an additional 15 females during August-October 2008 validated the effective use of the models across years. Little within year variation in habitat use was indicated from the comparison between stable isotope values from plasma (representing 1-2 weeks) and red blood cells (representing the prior few months). Constructing predictive models using stable isotopes provides an effective means to assess habitat use at the population level, is inexpensive, and can be applied to other marine predators.

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“…adult pollock and Pacific herring) are higher than prey species commonly found in the off-shelf habitat (e.g. northern smoothtongue and squid; [ 25 , 83 , 87 – 89 ]).…”

Section: Discussionmentioning

confidence: 99%

Stable Isotope Models Predict Foraging Habitat of Northern Fur Seals (Callorhinus ursinus) in Alaska

et al. 2015

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“…5. Содержимое желудков косатки [по Nishiwaki, Handa, 1958] , 2008;Филатова и др., 2014;Филатова, 2018;Filatova et al, 2019] [Krahn et al, 2007a;. Содержание стабильного изотопа азота 15 N у косаток R-типа было ниже (δ 15 N = 3 ‰), чем у косаток T-типа, что позволило авторам отнести их к различным трофическим уровням [Филатова и др., 2014].…”

Section: обсуж дениеunclassified

On the issue of food consumption by Okhotsk Sea killer whales

Sidorov

Belokobylskiy

2021

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The results are presented on the daily and annual food consumption by killer whales with year-round keeping in net enclosures in Srednyaya Bay. The diet consisted of two species of fish: pink salmon and herring. For females, the daily fish consumption varied from 9 to 50.9 kg with an average of 32.6 kg, for males from 6 to 45.1 kg with an average of 34.1 kg. The annual minimum amount of fish for keeping one young individual in captivity ranges from 11.5 to 12.1 tons of pink salmon, which corresponds to energy requirements of 15.9 Gcal/year for females and 16.7 Gcal/year for males. An increase in the required amount of food for an animal with a decrease in water temperature was established. Based on the results of the factual material on nutrition, the annual consumption of a group of ten killer whales of different ages found in natural conditions was calculated. This value in terms of pink salmon is estimated at 200 tons of feed per year. The theoretical calculation of the annual consumption of various species of aquatic organisms by killer whales is presented. Based on the results of research and analysis of modern literature sources in comparison with historical data on the feeding of killer whales, it was proposed not to divide this species in the Sea of Okhotsk into “mammal-eating” and “fish-eating” ecotypes. In our opinion, the manifestation of different types of behavior (resident type, transit type) in killer whales should be considered, depending on climatic conditions and the availability of food objects. In hunting grounds, the resident type predominates in killer whales, which changes to a transit type of behavior when changing the feeding area or seasonal migration.

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“…During this time, surface waters are cold due to sea ice cover, and zooplankton grazers are less abundant allowing much of this primary production to be deposited at the benthos . Benthic-pelagic coupling leads to high biomass in benthic communities of the Arctic Ocean, and is considered an important process in maintaining Arctic marine food webs (Gorbatenko et al, 2009;Grebmeier et al, 1988;. As ice cover diminishes, and the shift from ice cover to open water occurs earlier and faster with increasing Arctic temperatures; predicted three large-scale biotic changes in Arctic production cycles: (1) higher primary and secondary production as unused nutrients from under the ice become available;…”

Section: Introductionmentioning

confidence: 99%

Spatial and Temporal Patterns of Arctic Nearshore Fish Community and Food Web Structures

Barton¹

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Benthic-pelagic trophic interactions within the fish assemblage in the western Bering Sea shelf area according to stomach content analysis and ratios of C and N stable isotopes

Cited by 12 publications

References 6 publications

Stable Isotope Models Predict Foraging Habitat of Northern Fur Seals (Callorhinus ursinus) in Alaska

Stable Isotope Models Predict Foraging Habitat of Northern Fur Seals (Callorhinus ursinus) in Alaska

On the issue of food consumption by Okhotsk Sea killer whales

Spatial and Temporal Patterns of Arctic Nearshore Fish Community and Food Web Structures

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