I am a cytogeneticist and meiosis researcher. Our favorite objects are killifish of the genus Nothobranchius. We are always open to collaboration.

Joined August 2016
Sergey Simanovsky retweeted
#FishBook - 'Fishes of the Genus ๐‘๐‘œ๐‘กโ„Ž๐‘œ๐‘๐‘Ÿ๐‘Ž๐‘›๐‘โ„Ž๐‘–๐‘ข๐‘ ' by Bรฉla Nagy and Brian R. Watters is a comprehensive reference guide to the remarkable seasonal fishes of Africa, bringing together decades of field observations from more than sixty expeditions across Africa, research, aquarium experience, taxonomy and conservation, in a richly illustrated 600-page volume, with many hundreds of full-colour photographs, over 150 habitats including 50 type localities, maps covering all species, phylogenetic diagrams, and detailed accounts of every species. Available to preorder now (link below) and expected to ship 10th November 2026. ๐—ฃ๐˜‚๐—ฏ๐—น๐—ถ๐˜€๐—ต๐—ฒ๐—ฟ'๐˜€ ๐—ฑ๐—ฒ๐˜€๐—ฐ๐—ฟ๐—ถ๐—ฝ๐˜๐—ถ๐—ผ๐—ป: 'Fishes of the Genus ๐‘๐‘œ๐‘กโ„Ž๐‘œ๐‘๐‘Ÿ๐‘Ž๐‘›๐‘โ„Ž๐‘–๐‘ข๐‘ ' presents a comprehensive account of Africaโ€™s remarkable seasonal fishes, which complete their entire life cycle in ephemeral wetlands that appear and vanish with the rains. โ€‹ Drawing on decades of field exploration, scientific research, and aquarium observations, Bรฉla Nagy and Brian R. Watters explore the ecology, life history, reproduction, diversity, classification, and conservation of these extraordinary fishes. From the seasonal wetlands they inhabit to the remarkable adaptations that allow them to survive months of drought as dormant embryos, the book reveals a unique group of fishes living at the edge of time. โ€‹ The book brings together extensive field observations from across Africa with detailed habitat descriptions, distribution and dispersal patterns, life-history studies, maintenance and breeding techniques, and modern approaches to classification and systematics. The final chapter provides comprehensive species accounts covering identification, taxonomy, habitat, distribution, conservation status, reproduction, and maintenance. Richly illustrated throughout, the book includes hundreds of full-colour photographs, biotope images, maps, phylogenetic diagrams, historical illustrations, and detailed drawings. It is both a scientific reference and a visual exploration of the extraordinary diversity of ๐‘๐‘œ๐‘กโ„Ž๐‘œ๐‘๐‘Ÿ๐‘Ž๐‘›๐‘โ„Ž๐‘–๐‘ข๐‘ . Written for researchers, conservationists, ichthyologists, killifish enthusiasts, and dedicated aquarists, this book offers an authoritative and accessible synthesis of one of Africaโ€™s most fascinating groups of freshwater fishes. 600 pages โ€‹| over 650 full-colour photos | 102 species accounts | 30 maps covering all species | 14 phylogenies | 7 x 10 in - 17.8 x 25.4 cm ๐—ข๐—ฟ๐—ฑ๐—ฒ๐—ฟ๐—ถ๐—ป๐—ด ๐—ฑ๐—ฒ๐˜๐—ฎ๐—ถ๐—น๐˜€: A limited number of softcover and hardcover books printed on premium 115gsm coated paper will be available directly from the authors (while supplies last) for 60 and 80 euros, respectively, plus shipping. Available via the website contact form. wildnothos.wixsite.com/wildnโ€ฆ The book will also be available through online distributors worldwide when launched. Online prices via online distributors will start at approximately 90 EUR / 96 USD for the softcover and 110 EUR / 130 USD for the hardcover, plus shipping. #AquariumHobby #Fishkeeping #Aquarist #TropicalFish #FishTank #Killifish #Killifishes #Books #AquariumBook #AquariumBooks #AnnualKillifish #SeasonalKillifish #Killifische #Nothobranchius #Nothobranchiidae
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Weโ€™ve published a very brief paper on the routine karyotype of Tetraodon. Tetraodontids are an interesting fish group: they have compact genomes, lots of transposons and chromosomal rearrangements. But their chromosomes are very very small ๐Ÿ˜ญ๐Ÿ˜€ doi.org/10.3897/compcytogen.โ€ฆ
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We are happy to present our new preprint on meiotic recombination analysis in Nothobranchius virgatus: crossovers spans almost entire chromosome arms in a fully monoarmed karyotype! Is this typical of all Notobranchius or not? Further research will show =)
Excited to share our preprint with @ssimanovsky and co-authors about male meiotic recombination patterns in an annual killifish Nothobranchius virgatus! -- tinyurl.com/ms8h8ma8 1. Fourth fish with profiled MLH1 binding. 2. Bimodal MLH1 distribution covers almost entire SCs.
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Sergey Simanovsky retweeted
Excited to share our new paper in @molecology on sex chromosome evolution in African killifish! ๐ŸŸ A great collaboration with @AlexandrSember! We uncovered โ‰ฅ4 sex chromosome turnovers across Nothobranchius spp. using cytogenetics & genomics. ๐Ÿ‘‰ onlinelibrary.wiley.com/doi/โ€ฆ
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Itโ€™s been a while since I was last here! Last year, we published a simple yet important karyotype article on Epiplatys, a relative of Nothobranchius
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Sergey Simanovsky retweeted
๐ŸŸ This paper aims to estimate the divergence of the #karyotype structure between and within the phylogenetically distant lineages of the family Distichodontidae. ๐Ÿ‘‰ Read more: doi.org/10.3897/compcytogen.โ€ฆ #chromosomes
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Sergey Simanovsky retweeted
So happy to see this paper published! "Fast satellite DNA evolution inย Nothobranchiusย annual killifishes". Fascinating insights into the evolution of satellite DNA in African annual killifishes of the genus Nothobranchius @AlexandrSember @mao_626. ๐Ÿ  ๐ŸŸ doi.org/10.1007/s10577-023-0โ€ฆ
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Mormyrids are my second favourite fishes after Nothobranchius! Unlike nothos, mormyrids are practically unavailable for captive breeding, so all expeditions are great important. Congratulations to the authors on this achievement!
Our new preprint on the charismatic mormyrids from Cameroon (Sanaga river)! It seems like species with longer snout tend to have higher signal in C and/or N stable isotope (=> different food source and higher trophic level) biorxiv.org/cgi/content/shorโ€ฆ
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Our new short report on #Cytogenetics for #EcologicalMonitoring. In our opinion, #Nothobranchius rachovii is the best laborotary model among fish for such studies! dx.doi.org/10.1134/S10623590โ€ฆ
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Sergey Simanovsky retweeted
Excited to share a great collaborative work on Nothobranchius cell lines establishment, where we contributed by cytogenetic evaluation of different lines and passages. sciencedirect.com/science/arโ€ฆ
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Sergey Simanovsky retweeted
The #karyotype differentiation of seven members of the N. ugandensis species group was examined by conventional karyotyping. See the results here: doi.org/10.3897/compcytogen.โ€ฆ #chromosomes #fish #cytogenetics @AlexandrSember @ssimanovsky @IAPGavcr
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Sergey Simanovsky retweeted
Chromosome fusions repatterned recombination rate and facilitated reproductive isolation during Pristionchus nematode speciation nature.com/articles/s41559-0โ€ฆ
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