Abundance and biomass of fishes in the Veleka River, Bulgaria
A total of 16 fish species have been identified in the Veleka River and its tributaries the Mladezhka River and the Aydere River. Three of the species are included in the Red Data Book of Bulgaria: Anguilla anguilla, Chalcalburnus chalcoides and Rutilus frisii. Mean abundance (N) and mean biomass (B...
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ftczechacademysc:oai:kramerius.lib.cas.cz:uuid:3d5fd20d-6dd6-2e7d-1850-3359c4e45b6c 2024-03-17T08:53:20+00:00 Abundance and biomass of fishes in the Veleka River, Bulgaria Dikov Tsvetan Živkov Mladen https://kramerius.lib.cas.cz/view/uuid:3d5fd20d-6dd6-2e7d-1850-3359c4e45b6c eng eng https://kramerius.lib.cas.cz/view/uuid:3d5fd20d-6dd6-2e7d-1850-3359c4e45b6c Black Sea basin fish stocks rare species protected species article ftczechacademysc 2024-02-19T22:42:29Z A total of 16 fish species have been identified in the Veleka River and its tributaries the Mladezhka River and the Aydere River. Three of the species are included in the Red Data Book of Bulgaria: Anguilla anguilla, Chalcalburnus chalcoides and Rutilus frisii. Mean abundance (N) and mean biomass (B) of fishes were as follows: 3093 ind. ha-1 and 68.19 kg ha-1 in the Veleka River, 1220 ind. ha-1 and 16.73 kg ha-1 in the Mladezhka River, and 1025 ind. ha-1 and 41.18 kg ha in the Aydere River. The values obtained were much lower than the values of N and B of fishes in nine other Bulgarian rivers. The main reasons for the low fish abundance and biomass in the Veleka River and its tributaries were the intensive development of tourist industry in the region and the intensive, practically uncontrolled commercial and sport fishing and poaching. Article in Journal/Newspaper Anguilla anguilla Czech Academy of Sciences: dKNAV |
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Open Polar |
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Czech Academy of Sciences: dKNAV |
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ftczechacademysc |
language |
English |
topic |
Black Sea basin fish stocks rare species protected species |
spellingShingle |
Black Sea basin fish stocks rare species protected species Dikov Tsvetan Živkov Mladen Abundance and biomass of fishes in the Veleka River, Bulgaria |
topic_facet |
Black Sea basin fish stocks rare species protected species |
description |
A total of 16 fish species have been identified in the Veleka River and its tributaries the Mladezhka River and the Aydere River. Three of the species are included in the Red Data Book of Bulgaria: Anguilla anguilla, Chalcalburnus chalcoides and Rutilus frisii. Mean abundance (N) and mean biomass (B) of fishes were as follows: 3093 ind. ha-1 and 68.19 kg ha-1 in the Veleka River, 1220 ind. ha-1 and 16.73 kg ha-1 in the Mladezhka River, and 1025 ind. ha-1 and 41.18 kg ha in the Aydere River. The values obtained were much lower than the values of N and B of fishes in nine other Bulgarian rivers. The main reasons for the low fish abundance and biomass in the Veleka River and its tributaries were the intensive development of tourist industry in the region and the intensive, practically uncontrolled commercial and sport fishing and poaching. |
format |
Article in Journal/Newspaper |
author |
Dikov Tsvetan Živkov Mladen |
author_facet |
Dikov Tsvetan Živkov Mladen |
author_sort |
Dikov Tsvetan |
title |
Abundance and biomass of fishes in the Veleka River, Bulgaria |
title_short |
Abundance and biomass of fishes in the Veleka River, Bulgaria |
title_full |
Abundance and biomass of fishes in the Veleka River, Bulgaria |
title_fullStr |
Abundance and biomass of fishes in the Veleka River, Bulgaria |
title_full_unstemmed |
Abundance and biomass of fishes in the Veleka River, Bulgaria |
title_sort |
abundance and biomass of fishes in the veleka river, bulgaria |
url |
https://kramerius.lib.cas.cz/view/uuid:3d5fd20d-6dd6-2e7d-1850-3359c4e45b6c |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_relation |
https://kramerius.lib.cas.cz/view/uuid:3d5fd20d-6dd6-2e7d-1850-3359c4e45b6c |
_version_ |
1793764384927907840 |