FOOD RELATIONS BETWEEN WHITEFISH SPECIES IN THE LOWER COURSE OF THE USA RIVER IN THE AUTUMN PERIOD
Feeding characteristics of the Siberian whitefish (pizhyan) and the White Sea least cisco in the Usa River, which is one of the main right-bank tributaries to the Pechora River, are considered. It has been found that while the food spectrum was quite wide (23 groups of food items), the bulk of the d...
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Online Access: | https://doi.org/10.17076/eco1196 https://doaj.org/article/c029bf8a3a3f4ef4989bfee82f51ccc2 |
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ftdoajarticles:oai:doaj.org/article:c029bf8a3a3f4ef4989bfee82f51ccc2 2023-05-15T17:55:01+02:00 FOOD RELATIONS BETWEEN WHITEFISH SPECIES IN THE LOWER COURSE OF THE USA RIVER IN THE AUTUMN PERIOD Aleksey Borovskoy Alexander Novoselov 2020-05-01T00:00:00Z https://doi.org/10.17076/eco1196 https://doaj.org/article/c029bf8a3a3f4ef4989bfee82f51ccc2 EN RU eng rus Karelian Research Centre of the Russian Academy of Sciences http://journals.krc.karelia.ru/index.php/ecology/article/view/1196 https://doaj.org/toc/1997-3217 https://doaj.org/toc/2312-4504 1997-3217 2312-4504 doi:10.17076/eco1196 https://doaj.org/article/c029bf8a3a3f4ef4989bfee82f51ccc2 Transactions of the Karelian Research Centre of the Russian Academy of Sciences, Iss 5 (2020) usa river general feeding patterns of the siberian whitefish (coregonus lavaretus pidschian) and the white sea least cisco (coregonus sardinella marisalbi) age-related changes in feeding frequency of occurrence relative significance index food relati Science Q article 2020 ftdoajarticles https://doi.org/10.17076/eco1196 2022-12-31T12:50:55Z Feeding characteristics of the Siberian whitefish (pizhyan) and the White Sea least cisco in the Usa River, which is one of the main right-bank tributaries to the Pechora River, are considered. It has been found that while the food spectrum was quite wide (23 groups of food items), the bulk of the diet was made up of invertebrates in various developmental stages, as well as the blue-green colonial algae and indigestible particles. Analysis of the weight shares of the components showed that the biggest contributor to the whitefish diet was aquatic larvae of insects of the Chironomidae family (60.0 %); and in the diet of the least cisco this index was the highest for adult Simuliidae (43.0 %). No significant age-related differences in feeding were found in either of the two species. Their food spectra differ significantly both in terms of the main ontogenetic stages of invertebratesand the main groups of food items, wherefore the trophic tension is low. Low values of the food similarity index and trophic niche overlap indicate a weak competition for food between these fish species in the autumn period. The whitefish acts as a typical benthos feeder with a broad food spectrum, while the least cisco is euryphagous, easily switching between various groups of food item when necessary. Article in Journal/Newspaper Pechora pidschian White Sea Directory of Open Access Journals: DOAJ Articles White Sea Proceedings of the Karelian Research Centre of the Russian Academy of Sciences 5 44 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English Russian |
topic |
usa river general feeding patterns of the siberian whitefish (coregonus lavaretus pidschian) and the white sea least cisco (coregonus sardinella marisalbi) age-related changes in feeding frequency of occurrence relative significance index food relati Science Q |
spellingShingle |
usa river general feeding patterns of the siberian whitefish (coregonus lavaretus pidschian) and the white sea least cisco (coregonus sardinella marisalbi) age-related changes in feeding frequency of occurrence relative significance index food relati Science Q Aleksey Borovskoy Alexander Novoselov FOOD RELATIONS BETWEEN WHITEFISH SPECIES IN THE LOWER COURSE OF THE USA RIVER IN THE AUTUMN PERIOD |
topic_facet |
usa river general feeding patterns of the siberian whitefish (coregonus lavaretus pidschian) and the white sea least cisco (coregonus sardinella marisalbi) age-related changes in feeding frequency of occurrence relative significance index food relati Science Q |
description |
Feeding characteristics of the Siberian whitefish (pizhyan) and the White Sea least cisco in the Usa River, which is one of the main right-bank tributaries to the Pechora River, are considered. It has been found that while the food spectrum was quite wide (23 groups of food items), the bulk of the diet was made up of invertebrates in various developmental stages, as well as the blue-green colonial algae and indigestible particles. Analysis of the weight shares of the components showed that the biggest contributor to the whitefish diet was aquatic larvae of insects of the Chironomidae family (60.0 %); and in the diet of the least cisco this index was the highest for adult Simuliidae (43.0 %). No significant age-related differences in feeding were found in either of the two species. Their food spectra differ significantly both in terms of the main ontogenetic stages of invertebratesand the main groups of food items, wherefore the trophic tension is low. Low values of the food similarity index and trophic niche overlap indicate a weak competition for food between these fish species in the autumn period. The whitefish acts as a typical benthos feeder with a broad food spectrum, while the least cisco is euryphagous, easily switching between various groups of food item when necessary. |
format |
Article in Journal/Newspaper |
author |
Aleksey Borovskoy Alexander Novoselov |
author_facet |
Aleksey Borovskoy Alexander Novoselov |
author_sort |
Aleksey Borovskoy |
title |
FOOD RELATIONS BETWEEN WHITEFISH SPECIES IN THE LOWER COURSE OF THE USA RIVER IN THE AUTUMN PERIOD |
title_short |
FOOD RELATIONS BETWEEN WHITEFISH SPECIES IN THE LOWER COURSE OF THE USA RIVER IN THE AUTUMN PERIOD |
title_full |
FOOD RELATIONS BETWEEN WHITEFISH SPECIES IN THE LOWER COURSE OF THE USA RIVER IN THE AUTUMN PERIOD |
title_fullStr |
FOOD RELATIONS BETWEEN WHITEFISH SPECIES IN THE LOWER COURSE OF THE USA RIVER IN THE AUTUMN PERIOD |
title_full_unstemmed |
FOOD RELATIONS BETWEEN WHITEFISH SPECIES IN THE LOWER COURSE OF THE USA RIVER IN THE AUTUMN PERIOD |
title_sort |
food relations between whitefish species in the lower course of the usa river in the autumn period |
publisher |
Karelian Research Centre of the Russian Academy of Sciences |
publishDate |
2020 |
url |
https://doi.org/10.17076/eco1196 https://doaj.org/article/c029bf8a3a3f4ef4989bfee82f51ccc2 |
geographic |
White Sea |
geographic_facet |
White Sea |
genre |
Pechora pidschian White Sea |
genre_facet |
Pechora pidschian White Sea |
op_source |
Transactions of the Karelian Research Centre of the Russian Academy of Sciences, Iss 5 (2020) |
op_relation |
http://journals.krc.karelia.ru/index.php/ecology/article/view/1196 https://doaj.org/toc/1997-3217 https://doaj.org/toc/2312-4504 1997-3217 2312-4504 doi:10.17076/eco1196 https://doaj.org/article/c029bf8a3a3f4ef4989bfee82f51ccc2 |
op_doi |
https://doi.org/10.17076/eco1196 |
container_title |
Proceedings of the Karelian Research Centre of the Russian Academy of Sciences |
container_issue |
5 |
container_start_page |
44 |
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1766162884538138624 |