3 results on '"Kmentová, Nikol"'
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2. From the Atlantic Coast to Lake Tanganyika: Gill-Infecting Flatworms of Freshwater Pellonuline Clupeid Fishes in West and Central Africa, with Description of Eleven New Species and Key to Kapentagyrus (Monogenea, Dactylogyridae).
- Author
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Vanhove, Maarten P. M., Hermans, Raquel, Artois, Tom, and Kmentová, Nikol
- Subjects
MONOGENEA ,PLATYHELMINTHES ,NUMBERS of species ,FRESH water ,SPECIES - Abstract
Simple Summary: Sardines and other herring-like fishes (Clupeidae) are well-known, mostly from open seas, and globally commercially important. Their freshwater representatives receive less attention. Tropical Africa harbours over 20 species of the latter, classified under Pellonulini. These small river and lake fishes sustain locally important fisheries and are sometimes exported (inter)nationally. There is little research on them, let alone their parasites. An abundant parasite group of African freshwater clupeids is monogenean flatworms infecting their gills. Since the discoveries of the first (1969) and second species (1973) systematics of these monogeneans was ignored until 2018, when they were classified under the new genus Kapentagyrus with three species from three pellonuline species. Here, we inspected the gills of 12 West and Central African pellonulines, 10 from which there were no known parasites. We discovered and described 11 new species of Kapentagyrus. They look highly similar; distinguishing them requires measuring parts of their attachment organ. This study more than quadruples the known species richness of Kapentagyrus, and almost quadruples the number of pellonuline species of which monogeneans are known. Monogeneans are suitable tags for the lifestyle and history of their hosts. Therefore, parasitological knowledge on these poorly studied fishes will contribute to understanding data-poor African fisheries. Unlike their marine counterparts, tropical freshwater clupeids receive little scientific attention. However, they sustain important fisheries that may be of (inter)national commercial interest. Africa harbours over 20 freshwater clupeid species within Pellonulini. Recent research suggests their most abundant parasites are gill-infecting monogenean flatworms within Kapentagyrus. After inspecting specimens of 12 freshwater clupeids from West and Central Africa, mainly sourced in biodiversity collections, we propose 11 new species of Kapentagyrus, which we describe using their haptoral and genital morphology. Because of their high morphological similarity, species delineation relies mostly on the morphometrics of anchors and hooks. Specifically, earlier, molecular taxonomic work indicated that the proportion between the length of the anchor roots, and between the hook and anchor length, is diagnostic. On average, about one species of Kapentagyrus exists per pellonuline species, although Pellonula leonensis harbours four species and Microthrissa congica two, while Microthrissa moeruensis and Potamothrissa acutirostris share a gill monogenean species. This study more than quadruples the number of known species of Kapentagyrus, also almost quadrupling the number of pellonuline species of which monogeneans are known. Since members of Kapentagyrus are informative about their hosts' ecology, evolutionary history, and introduction routes, this enables a parasitological perspective on several data-poor African fisheries. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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3. First genomic study on Lake Tanganyika sprat Stolothrissa tanganicae: a lack of population structure calls for integrated management of this important fisheries target species
- Author
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Carl Vangestel, Els Lea R. De Keyzer, Federico C. F. Calboli, Maarten P.M. Vanhove, Théophile N’Sibula Mulimbwa, Pascal Masilya Mulungula, Joost A. M. Raeymaekers, Zoë De Corte, Massimiliano Virgilio, Filip Volckaert, Maarten Van Steenberge, Nikol Kmentová, De Keyzer, Els L. R., De Corte, Zoë, VAN STEENBERGE, Maarten, Raeymaekers, Joost A. M., Calboli, Federico C. F., Kmentová, Nikol, N’Sibula Mulimbwa, Théophile, Virgilio, Massimiliano, Vangestel, Carl, Mulungula, Pascal Masilya, Volckaert, Filip A. M., VANHOVE, Maarten, and Finnish Museum of Natural History
- Subjects
0106 biological sciences ,0301 basic medicine ,LOCI ,LEVEL FLUCTUATIONS ,Tanzania ,01 natural sciences ,Gene flow ,Population genomics ,PELAGIC FISH ,SARDINE ,Fish ,Freshwater ,High-throughput sequencing ,RAD sequencing ,SNP ,Panmixis ,East Africa ,Great Lakes ,Stock management ,Lake Tanganyika sprat ,Genetics & Heredity ,CICHLID FISHES ,Principal Component Analysis ,education.field_of_study ,Genome ,biology ,1184 Genetics, developmental biology, physiology ,Fishes ,Discriminant Analysis ,INSIGHTS ,Phylogeography ,1181 Ecology, evolutionary biology ,Fisheries management ,Life Sciences & Biomedicine ,Research Article ,Conservation of Natural Resources ,MARINE FISH ,Evolution ,Population ,Fisheries ,DNA, Mitochondrial ,Polymorphism, Single Nucleotide ,010603 evolutionary biology ,03 medical and health sciences ,GENE FLOW ,QH359-425 ,Animals ,14. Life underwater ,education ,Ecology, Evolution, Behavior and Systematics ,Isolation by distance ,Evolutionary Biology ,Science & Technology ,Base Sequence ,Overfishing ,R-PACKAGE ,biology.organism_classification ,EVOLUTION ,Fishery ,Lakes ,Genetics, Population ,030104 developmental biology ,Haplotypes ,Genetic Loci - Abstract
Background: Clupeid fisheries in Lake Tanganyika (East Africa) provide food for millions of people in one of the world’s poorest regions. Due to climate change and overfishing, the clupeid stocks of Lake Tanganyika are declining. We investigate the population structure of the Lake Tanganyika sprat Stolothrissa tanganicae, using for the first time a genomic approach on this species. This is an important step towards knowing if the species should be managed separately or as a single stock. Population structure is important for fisheries management, yet understudied for many African freshwater species. We hypothesize that distinct stocks of S. tanganicae could be present due to the large size of the lake (isolation by distance), limnological variation (adaptive evolution), or past separation of the lake (historical subdivision). On the other hand, high mobility of the species and lack of obvious migration barriers might have resulted in a homogenous population. Results: We performed a population genetic study on wild-caught S. tanganicae through a combination of mitochondrial genotyping (96 individuals) and RAD sequencing (83 individuals). Samples were collected at five locations along a northsouth axis of Lake Tanganyika. The mtDNA data had low global FST and, visualised in a haplotype network, did not show phylogeographic structure. RAD sequencing yielded a panel of 3504 SNPs, with low genetic differentiation (FST = 0.0054; 95% CI: 0.0046–0.0066). PCoA, fineRADstructure and global FST suggest a near-panmictic population. Two distinct groups are apparent in these analyses (FST = 0.1338 95% CI: 0.1239,0.1445), which do not correspond to sampling locations. Autocorrelation analysis showed a slight increase in genetic difference with increasing distance. No outlier loci were detected in the RADseq data. Conclusion: Our results show at most very weak geographical structuring of the stock and do not provide evidence for genetic adaptation to historical or environmental differences over a north-south axis. Based on these results, we advise to manage the stock as one population, integrating one management strategy over the four riparian countries. These results are a first comprehensive study on the population structure of these important fisheries target species, and can guide fisheries management. Research has been supported by the JEMU pilot project PopGenSprat (BELSPO funding) and the Belgian Development Cooperation through VLIR-UOS (VLADOC scholarship NDOC2016PR006 to ELRDK). MPMV was supported by the Belgian Directorate-General for Development Cooperation and Humanitarian Aid (CEBioS program). MPMV and NK are supported by the Czech Science Foundation (P505/12/G112 (ECIP)). These funding sources had no role in the design of the study and collection, analysis, and interpretation of data and in writing the manuscript.
- Published
- 2019
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