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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ftdoajarticles:oai:doaj.org/article:97c0e63896bb431d999c37ad5d7497d9 2023-05-15T15:47:10+02:00 Status of the burbot (Lota lota L.) in the Lower Danube (Bulgaria) – a species threatened by climate change Pencho G. Pandakov Teodora M. Teofilova Nikolay D. Kodzhabashev 2020-02-01T00:00:00Z https://doi.org/10.3897/zookeys.910.47866 https://doaj.org/article/97c0e63896bb431d999c37ad5d7497d9 EN eng Pensoft Publishers https://zookeys.pensoft.net/article/47866/download/pdf/ https://zookeys.pensoft.net/article/47866/download/xml/ https://zookeys.pensoft.net/article/47866/ https://doaj.org/toc/1313-2989 https://doaj.org/toc/1313-2970 doi:10.3897/zookeys.910.47866 1313-2970 1313-2989 https://doaj.org/article/97c0e63896bb431d999c37ad5d7497d9 ZooKeys, Vol 910, Iss , Pp 143-161 (2020) Zoology QL1-991 article 2020 ftdoajarticles https://doi.org/10.3897/zookeys.910.47866 2022-12-31T11:42:55Z 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 Directory of Open Access Journals: DOAJ Articles ZooKeys 910 143 161 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Zoology QL1-991 |
spellingShingle |
Zoology QL1-991 Pencho G. Pandakov Teodora M. Teofilova Nikolay D. Kodzhabashev Status of the burbot (Lota lota L.) in the Lower Danube (Bulgaria) – a species threatened by climate change |
topic_facet |
Zoology QL1-991 |
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 |
Pencho G. Pandakov Teodora M. Teofilova Nikolay D. Kodzhabashev |
author_facet |
Pencho G. Pandakov Teodora M. Teofilova Nikolay D. Kodzhabashev |
author_sort |
Pencho G. Pandakov |
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 https://doaj.org/article/97c0e63896bb431d999c37ad5d7497d9 |
genre |
Burbot Lota lota lota |
genre_facet |
Burbot Lota lota lota |
op_source |
ZooKeys, Vol 910, Iss , Pp 143-161 (2020) |
op_relation |
https://zookeys.pensoft.net/article/47866/download/pdf/ https://zookeys.pensoft.net/article/47866/download/xml/ https://zookeys.pensoft.net/article/47866/ https://doaj.org/toc/1313-2989 https://doaj.org/toc/1313-2970 doi:10.3897/zookeys.910.47866 1313-2970 1313-2989 https://doaj.org/article/97c0e63896bb431d999c37ad5d7497d9 |
op_doi |
https://doi.org/10.3897/zookeys.910.47866 |
container_title |
ZooKeys |
container_volume |
910 |
container_start_page |
143 |
op_container_end_page |
161 |
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1766381973452881920 |