Rapid Morphological Diversification of the Cyprinid Fish Oreoleuciscus potanini (Cyprinidae) in the Course of Formation of a Reservoir in a River of the Semiarid Zone

Dgebuadze, Yu. Yu.; Mironovsky, A. N.; Mendsaikhan, Bud; Slynko, Yu. V.

doi:10.1134/s0012496620010019

Cited by 6 publications

(1 citation statement)

References 7 publications

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“…The formation of Central Asian populations took place under extremely high varying abiotic conditions. Due to fluctuating environmental conditions and with almost complete absence of competition from other fish species, O. potanini in Central Asia had the opportunity to adapt to a range of habitats (Dgebuadze et al, 2020). Currently this group dominates in the fish population of most water bodies in the Central Asian Inland Basin of Mongolia, gradually expanding its range to the Baikal Lake Basin (Dgebuadze et al, 2003;Slynko & Borovikova, 2012).…”

Section: Introductionmentioning

confidence: 99%

Parasites of Oreoleuciscus potanini (Cyprinidae) from lakes of Khar Us Nuur National Park (Mongolia)

Lebedeva¹,

Mendsaikhan²,

Yakovleva³

et al. 2020

Nat. Conserv. Res.

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Freshwater ecosystems of Mongolia belong to the three major Central Asian drainage systems: Arctic drainage, Amur River drainage, and Central Asian Internal drainage. The Great Lakes Depression takes considerable part of the latter. One of the few fish species living there, Oreoleuciscus potanini, is the most common and widespread endemic species in the Central Asian region. Parasitological surveys on O. potanini from the Great Lakes Depression have not occurred regularly in recent years. Consequently, this study was conducted to explore the species diversity of helminth parasites in O. potanini in the three lakes of Khar Us Nuur National Park. In total, 52 O. potanini specimens were collected from the lakes Khar, Khar Us and Durgen and sampled in August 2012. In addition to the parasites, the age and diet spectrum of the fish species were studied. The fish were examined for infection with ecto-and endo-macroparasites. The species composition of Diplostomum spp. metacercariae from the eyes of fish was investigated using a molecular approach. In the lakes Khar and Khar Us the fish age ranged from four to 32 years old and from eight to 35 years old, respectively. Fish of four age groups (9, 10, 11 and 14 years old) were in Lake Durgen. Algae and various insects, including Chironomida larvae were the main food of the O. potanini in all three lakes. When the diet was investigated we found that in Lake Durgen Cladocera crustaceans were the significant component in the fish diet, and no fish was found in the O. potanini diet there. During the study 26 parasites species were identified from the three lakes. The total fauna is represented by four phyla, including Acanthocephala (one species), Annelida (one species), Nematoda (four species), Platyhelminthes (20 species). The last group was the most numerous and diverse, including three species of Cestoda, six species of Monogenea and 11 species of Trematoda. Five species of parasites were specific to O. potanini only (monogeneans Gyrodactylus mongolicus, G. oreoleucisci, G. pewsowi, nematodes Philometra oreoleucisci and Rhabdochona humili). The other helminthes exhibited a low host-specificity, infecting a wide range of fishes in the Holarctic. The larvae of endohelminthes predominate in the parasite fauna. The majority of these parasites enter the fish via various invertebrate species during O. potanini's feeding. Our study provided novel data on the species diversity of Diplostomum spp. metacercaria in O. potanini's eyes. They were represented by three species: Diplostomum spathaceum, D. pseudospathaceum and Diplostomum sp. LIN2. The species richness and diversity of parasites were much higher for O. potanini from the lakes Khar and Khar Us (26 species), than that for O. potanini of Lake Durgen (15 species). The possible reason for the absence of some parasites in Lake Durgan is an increased water salinity. It is likely that, despite the potential for the fish to exist under conditions of an elevated salinity, parasites (or their invertebrate hosts) are not adapted to i...

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Section: Introductionmentioning

confidence: 99%

Parasites of Oreoleuciscus potanini (Cyprinidae) from lakes of Khar Us Nuur National Park (Mongolia)

Lebedeva¹,

Mendsaikhan²,

Yakovleva³

et al. 2020

Nat. Conserv. Res.

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Trophic resource partitioning by sympatric ecomorphs of Schizopygopsis (Cyprinidae) in a young Pamir Mountain lake: preliminary results

2020

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Comparative Analysis of Morphological Diversification in Large African Barbs of the Genus Barbus (Labeobarbus auctorum, Cyprinidae) and Altai Osmans of the Genus Oreoleuciscus (Leuciscidae)

Mina,

Mironovsky,

Dgebuadze

2024

J. Ichthyol.

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The study of diversity in characters of the skull in generalized and specialized morphotypes of the large African barbs Barbus (Labeobarbus auctorum) in Ethiopia is carried out using the multivariate analysis methods. It has been proven that in Lake Tana exhibiting great diversity in morphotypes, the eigenvector loadings on the first principal component of characters of bones, which form the jaws, compose a distinct self-standing cluster in specimens of a generalized form reaching over 15 cm in length. In barbs inhabiting other lakes, where only a generalized form is found, the lack of such cluster is observed, while the eigenvector loadings on the second principal component generate a cluster similar in composition. The same pattern is discovered in the Altai osmans (genus Oreoleuciscus) in Lake Orog within the Central Asian Closed Basin (Mongolia). In this case, however, the specimens of the generalized form tend to exhibit the characters of a bigmouth form after transition to feeding on fish whereas the progeny of bigmouth barbs in Lake Tana exhibit the parental characters even in the aquarium-based experiments. It is assumed that in the Altai osmans from Lake Orog we observe an early stage of morpho-ecological divergence between forms, when it is still reversible, while the divergence at a later stage, when it is irreversible, is detected in the barbs from Lake Tana, which may be regarded as an example of genetic assimilation.

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Rapid Morphological Diversification of the Cyprinid Fish Oreoleuciscus potanini (Cyprinidae) in the Course of Formation of a Reservoir in a River of the Semiarid Zone

Cited by 6 publications

References 7 publications

Parasites of Oreoleuciscus potanini (Cyprinidae) from lakes of Khar Us Nuur National Park (Mongolia)

Parasites of Oreoleuciscus potanini (Cyprinidae) from lakes of Khar Us Nuur National Park (Mongolia)

Trophic resource partitioning by sympatric ecomorphs of Schizopygopsis (Cyprinidae) in a young Pamir Mountain lake: preliminary results

Comparative Analysis of Morphological Diversification in Large African Barbs of the Genus Barbus (Labeobarbus auctorum, Cyprinidae) and Altai Osmans of the Genus Oreoleuciscus (Leuciscidae)

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