Peculiarities of Carotenoid Pigments' Distribution in Organism of the Freshwater Mollusks

Kyrychuk, G. Ye.; Muzyka, L. V.

doi:10.1615/hydrobj.v53.i5.90

Cited by 5 publications

(4 citation statements)

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“…Analyzing the data presented in the figure, it can be noted that the quantitative development of plankton community in the Tobol River in 2019 is 1.2 times lower than in 2018 and averaged 1.80 g/m 3 . In general, it should be noted that according to the development of zooplankton, the Tobol River is a water body of moderate class of food supply and in accordance with the "scale of trophicity" of Kitayev [19] can be classified as β-mesotrophic water body.…”

Section: Resultsmentioning

confidence: 94%

“…The composition and abundance of zoobenthos are intrinsically linked to the physical characteristics of rivers, with substrate playing a crucial role in the development and distribution of zoobenthos [1]. Other factors, such as altitude, temperature, and river velocity, also significantly influence the composition and abundance of benthic invertebrate groups [2][3][4]. The Tobol River, originating from the uplands of the Trans-Ural Plateau at the border of the Republic of Kazakhstan and the Russian Federation, spans 1,674 km in length, with 800 km traversing Kazakhstan's territory.…”

Section: Introductionmentioning

confidence: 99%

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Assessing the Ecological and Biological Forage Base of the Tobol River: Implications for Planktonic and Benthic Communities

Kurzhykayev¹,

Shutkarayev²,

Barinova³

et al. 2023

IJDNE

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The Tobol River, a nationally significant economic water body, serves various purposes and spans across diverse landscape zones and environmental conditions. An evaluation of the forage base development of the Tobol River was conducted through the survey of six stations along the river in 2019. The investigation revealed a total of 15 species of planktonic invertebrates, including 6 rotifers, 5 cladocerans, and 4 copepods, as well as 28 species of benthic organisms. The survey period of 2016-2019 registered 36 species and forms of benthic organisms within the Tobol River basin, with a high diversity of insect groups. The considerable length and varied landscape zones of the river contribute to the observed high diversity of organisms. In terms of zooplankton development, the Tobol River exhibits a moderate food supply class and, according to S.P. Kitayev's trophic scale, can be classified as a β-mesotrophic water body. Similarly, the river's zoobenthos development indicates a moderate food supply class, designating it as an αmesotrophic type under S.P. Kitayev's trophic classification. The study of the food spectrum of river perch and roach in the Tobol River suggests relatively high food availability for these species, underscoring the importance of understanding the ecological and biological forage base of the river for maintaining ecosystem health.

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Section: Resultsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Assessing the Ecological and Biological Forage Base of the Tobol River: Implications for Planktonic and Benthic Communities

Kurzhykayev¹,

Shutkarayev²,

Barinova³

et al. 2023

IJDNE

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show abstract

“…4 (0.025). These are high indicators for the river, which indicate a strong negative impact of the city on the river [16,30,31]. According to earlier studies in 2013, the maximum ratio of saprophytes to the total number of bacteria did not exceed 0.31% [29].…”

Section: Resultsmentioning

confidence: 99%

Hydrobiological Assessment of Water Quality in the Yesil River, Astana Region: An Environmental Evaluation

Akbayeva¹,

Beisenova²,

Tazitdinova³

et al. 2023

IJDNE

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This study provides an in-depth characterization of the water quality in the Yesil River in the Astana region for 2019, utilizing hydrochemical parameters and key indicators of bacterioplankton, zooplankton, and zoobenthos. Quantitative evaluation methods were employed to assess hydrobionts, including total bacterial counts, heterotrophic bacterial counts, bacterial multiplication rates, biomass, and abundance of zooplankton and zoobenthos, in addition to species identification for various organisms. The results indicated that, based on the bacterioplankton development level, the investigated section of the Yesil River is classified as a mesotrophic water body. As the river flows through the city, the average bacterial mass doubling time decreases due to an increase in the proportion of heterotrophic bacteria. Based on the saprobity index level for the zooplankton community, the water in the Yesil River is categorized as moderately polluted. Macrozoobenthos saprobity indices range from moderately polluted to polluted waters. The final assessment of the water quality classification and contamination degree, according to Z.G. Gold's unified classifier, revealed a shift from class 3 in the sections upstream of Astana to class 4 in sections downstream of the city.

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“…Therefore, pathogens characteristic of both riverine and marine ecosystems is identified in this region (Tokpan et al 2020). Among invasive fish diseases that are registered in this region of Kazakhstan and are dangerous for humans or other farm animals and birds, opisthorchiasis (Opisthorchis felineus), anisacidosis (Anisakis simplex), ligulosis (Ligula imestinalis), postodiplostomosis (Posthodiplosto-muni cuticola) and crayfish aphanomycosis (Aphanomyces astaci Schikora 1906) are common (Kyrychuk and Muzyka 2017;Sergaliyev et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Results of Parasitological Research on Hydrobionts from Water Bodies in West Kazakhstan Region

2023

Int J Vet Sci

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Control fish catches in the reservoirs of the Ural-Kushum water-irrigation system and the Derkul, Ankaty, Shiderta, Buldyrty, Utva, and Rubezhka rivers allowed the establishment of the extensiveness and intensity of infestation by the main helminth species among fish and the studied reservoirs. Ligulosis pathogens had the highest prevalence in the territory of West Kazakhstan region, found in 5 of 9 surveyed reservoirs, and postodiplostomosis in 4 of 9. Diseases were registered predominantly among carp family fish, and the extensiveness of infestation was 4.1 and 3.2%, respectively, of the total number of fish. The main species in which helminths have been detected are redfin, roach, and goose. Among anthropozoonotic diseases, in which fish are intermediate hosts, individuals with opistorchosis metacercariae were found in Derkul and Rubezhka rivers. The extensiveness of infestation was 16% of the carp population, which was significantly lower than the results of earlier studies. Of the other diseases dangerous to humans, no anisacid larvae were detected, which also did not agree with literature sources. Parallel to the parasitological examinations of fish, an examination of caught crayfish was carried out to determine the number of diseased crayfish. The survey revealed that about 20% of the river crayfish caught in the reservoirs had signs of rust-stain disease.

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Peculiarities of Carotenoid Pigments' Distribution in Organism of the Freshwater Mollusks

Cited by 5 publications

References 0 publications

Assessing the Ecological and Biological Forage Base of the Tobol River: Implications for Planktonic and Benthic Communities

Assessing the Ecological and Biological Forage Base of the Tobol River: Implications for Planktonic and Benthic Communities

Hydrobiological Assessment of Water Quality in the Yesil River, Astana Region: An Environmental Evaluation

Results of Parasitological Research on Hydrobionts from Water Bodies in West Kazakhstan Region

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