Status of the burbot (Lota lota L.) in the Lower Danube (Bulgaria) – a species threatened by climate change
The study provides data on the catch composition, length-weight relationship, age structure, gender structure, growth, maturation, fecundity, distribution and conservation status of the burbot Lota lota (Linnaeus, 1758) in Bulgaria. During six consecutive winters (2008–2014) a total of 395 burbot sp...
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2020
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Online Access: | https://doi.org/10.3897/zookeys.910.47866 |
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ftzenodo:oai:zenodo.org:3672299 2024-09-15T18:00:31+00:00 Status of the burbot (Lota lota L.) in the Lower Danube (Bulgaria) – a species threatened by climate change Pandakov, Pencho G. Teofilova, Teodora M. Kodzhabashev, Nikolay D. 2020-02-10 https://doi.org/10.3897/zookeys.910.47866 unknown Pensoft Publishers https://doi.org/10.3897/zookeys.910.47866.figure6 https://doi.org/10.3897/zookeys.910.47866.figure7 https://doi.org/10.3897/zookeys.910.47866.figure8 https://doi.org/10.3897/zookeys.910.47866.figure10 https://doi.org/10.3897/zookeys.910.47866.figure4 https://doi.org/10.3897/zookeys.910.47866.figure5 https://doi.org/10.3897/zookeys.910.47866.figure11 https://doi.org/10.3897/zookeys.910.47866.figure3 https://doi.org/10.3897/zookeys.910.47866.figure2 https://doi.org/10.3897/zookeys.910.47866.figure1 https://doi.org/10.3897/zookeys.910.47866.figure9 https://zenodo.org/communities/biosyslit https://doi.org/10.3897/zookeys.910.47866 oai:zenodo.org:3672299 info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode ZooKeys, 910, 143-161, (2020-02-10) Animalia Chordata Actinopterygii Gadiformes Lotidae Lota Lota lota Age structure conservation status fecundity fragmentation growth length-weight relationship info:eu-repo/semantics/article 2020 ftzenodo https://doi.org/10.3897/zookeys.910.4786610.3897/zookeys.910.47866.figure610.3897/zookeys.910.47866.figure710.3897/zookeys.910.47866.figure810.3897/zookeys.910.47866.figure1010.3897/zookeys.910.47866.figure410.3897/zookeys.910.47866.figure510.3897/zookeys 2024-07-26T13:57:57Z The study provides data on the catch composition, length-weight relationship, age structure, gender structure, growth, maturation, fecundity, distribution and conservation status of the burbot Lota lota (Linnaeus, 1758) in Bulgaria. During six consecutive winters (2008–2014) a total of 395 burbot specimens were caught. The total length and the weight of the specimens ranged from 16 to 51 cm and 29.8 to 1057 g, respectively. Seven age classes were represented (3- to 9-years-old), with 3-, 4-, and 5-years-old most abundant. The maximal life expectancy was estimated as 12 years. Male-female ratio was 1:1. Maturity happens at the age of four at the earliest, valid for both sexes. One-quarter of the fish, older than 5 years were determined as non-reproducing in the particular year. The absolute fecundity varied between 47 462 and 810 236 eggs for females ranging from 5 to 7 years old and from 25.7 to 41.5 cm in length. A dramatic decrease of burbot population was observed in the last two decades. Warming water temperatures of the Danube, together with fragmentation in its tributaries are considered as the major threats affecting the species. Therefore, the burbot in Bulgaria is classified as Endangered. Article in Journal/Newspaper Burbot Lota lota lota Zenodo ZooKeys 910 143 161 |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Animalia Chordata Actinopterygii Gadiformes Lotidae Lota Lota lota Age structure conservation status fecundity fragmentation growth length-weight relationship |
spellingShingle |
Animalia Chordata Actinopterygii Gadiformes Lotidae Lota Lota lota Age structure conservation status fecundity fragmentation growth length-weight relationship Pandakov, Pencho G. Teofilova, Teodora M. Kodzhabashev, Nikolay D. Status of the burbot (Lota lota L.) in the Lower Danube (Bulgaria) – a species threatened by climate change |
topic_facet |
Animalia Chordata Actinopterygii Gadiformes Lotidae Lota Lota lota Age structure conservation status fecundity fragmentation growth length-weight relationship |
description |
The study provides data on the catch composition, length-weight relationship, age structure, gender structure, growth, maturation, fecundity, distribution and conservation status of the burbot Lota lota (Linnaeus, 1758) in Bulgaria. During six consecutive winters (2008–2014) a total of 395 burbot specimens were caught. The total length and the weight of the specimens ranged from 16 to 51 cm and 29.8 to 1057 g, respectively. Seven age classes were represented (3- to 9-years-old), with 3-, 4-, and 5-years-old most abundant. The maximal life expectancy was estimated as 12 years. Male-female ratio was 1:1. Maturity happens at the age of four at the earliest, valid for both sexes. One-quarter of the fish, older than 5 years were determined as non-reproducing in the particular year. The absolute fecundity varied between 47 462 and 810 236 eggs for females ranging from 5 to 7 years old and from 25.7 to 41.5 cm in length. A dramatic decrease of burbot population was observed in the last two decades. Warming water temperatures of the Danube, together with fragmentation in its tributaries are considered as the major threats affecting the species. Therefore, the burbot in Bulgaria is classified as Endangered. |
format |
Article in Journal/Newspaper |
author |
Pandakov, Pencho G. Teofilova, Teodora M. Kodzhabashev, Nikolay D. |
author_facet |
Pandakov, Pencho G. Teofilova, Teodora M. Kodzhabashev, Nikolay D. |
author_sort |
Pandakov, Pencho G. |
title |
Status of the burbot (Lota lota L.) in the Lower Danube (Bulgaria) – a species threatened by climate change |
title_short |
Status of the burbot (Lota lota L.) in the Lower Danube (Bulgaria) – a species threatened by climate change |
title_full |
Status of the burbot (Lota lota L.) in the Lower Danube (Bulgaria) – a species threatened by climate change |
title_fullStr |
Status of the burbot (Lota lota L.) in the Lower Danube (Bulgaria) – a species threatened by climate change |
title_full_unstemmed |
Status of the burbot (Lota lota L.) in the Lower Danube (Bulgaria) – a species threatened by climate change |
title_sort |
status of the burbot (lota lota l.) in the lower danube (bulgaria) – a species threatened by climate change |
publisher |
Pensoft Publishers |
publishDate |
2020 |
url |
https://doi.org/10.3897/zookeys.910.47866 |
genre |
Burbot Lota lota lota |
genre_facet |
Burbot Lota lota lota |
op_source |
ZooKeys, 910, 143-161, (2020-02-10) |
op_relation |
https://doi.org/10.3897/zookeys.910.47866.figure6 https://doi.org/10.3897/zookeys.910.47866.figure7 https://doi.org/10.3897/zookeys.910.47866.figure8 https://doi.org/10.3897/zookeys.910.47866.figure10 https://doi.org/10.3897/zookeys.910.47866.figure4 https://doi.org/10.3897/zookeys.910.47866.figure5 https://doi.org/10.3897/zookeys.910.47866.figure11 https://doi.org/10.3897/zookeys.910.47866.figure3 https://doi.org/10.3897/zookeys.910.47866.figure2 https://doi.org/10.3897/zookeys.910.47866.figure1 https://doi.org/10.3897/zookeys.910.47866.figure9 https://zenodo.org/communities/biosyslit https://doi.org/10.3897/zookeys.910.47866 oai:zenodo.org:3672299 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.3897/zookeys.910.4786610.3897/zookeys.910.47866.figure610.3897/zookeys.910.47866.figure710.3897/zookeys.910.47866.figure810.3897/zookeys.910.47866.figure1010.3897/zookeys.910.47866.figure410.3897/zookeys.910.47866.figure510.3897/zookeys |
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910 |
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