State of Fish Commuinity in Ilmen Lake Under Intensive  Fishery Pressure

Лукин, А. А.; Selection, Federal; Nikitina, T.V.; Lukina, Ju.N.; Tyrkin, I. A.

doi:10.36038/0234-2774-2019-20-1-23-32

Cited by 2 publications

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“…Особенности рельефа дна, диапазон глубин до 228 м обеспечивают огромное видовое разнообразие объектов промысла -лосось, налим, щука, судак, лещ, окунь, карась, плотва, хариус и др. [1].…”

Section: введение / Introductionunclassified

Evaluation of the good quality and parasitic purity of fish from lake Ladoga

Orlova¹,

Kalyuzhnaya²,

Karpenko³

et al. 2023

jour

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Freshwater fish is one of the most valuable resources of inland waters. Raw fish is a perishable product, therefore, the assessment of product freshness is the most important indicator of its safety. In addition, in relation to freshwater fish, the indicator of parasitic purity is of particular importance, since fish is an intermediate host of pathogens of parasitic diseases transmitted to humans.The studies were carried out in the summerautumn period. The objects of research were samples of chilled freshly caught fish from the southern part of Lake Ladoga. Veterinary and sanitary examination of fish was carried out in accordance with the Veterinary Rules for the appointment and conduct of veterinary and sanitary examination of fish, aquatic invertebrates and fish products from them intended for processing and sale by organoleptic, physicochemical and microscopic methods. Parasitological examination included external examination, parasitological dissection of the fish, examination of muscle tissue by the method of parallel cuts and compressor. As a result, the studied samples were recognized as fresh in terms of organoleptic, physicochemical and microscopic parameters. An external examination of the eyes revealed damage to the lens of the eye by metacercariae of trematodes Diplostomum sp., gill filaments of roach were affected by monogenetic flukes Dactylogyrus sp. Pigmented areas of localization of Posthodiplostomum cuticola metacercariae, the so-called «black-spotted disease», were noted on the surface of the body of fish of the cyprinid family.During parasitological autopsy and examination of the abdominal cavity, the surface of the internal organs of the bream, the larva of Ligula intestinalis was found, and the plerocercoids of Diphyllobothrium latum were found in the caviar of two individuals of the pike. As a result of a compressor study of the muscle tissue of pike, crucian carp, roach, rudd, perch, and bream, Paracoenogonimus ovatus metacercariae were identified. Of the parasites found in the samples of the studied fish, D. latum is of epidemiological significance, the rest of the pathogens are not dangerous to humans, the sanitary assessment of the fish should be given on the basis of the presentation of the product.

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Section: введение / Introductionunclassified

Evaluation of the good quality and parasitic purity of fish from lake Ladoga

Orlova¹,

Kalyuzhnaya²,

Karpenko³

et al. 2023

jour

View full text Add to dashboard Cite

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The dynamics of industrial fish catches in inland waters of Russia in 2014–2023

Bykov,

Brazhnik,

Borkichev

2024

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Based on the results of generalization of long-term data on the volume of industrial fishing in freshwater bodies of Russia for 2014–2023, a comprehensive analysis of the state of industrial fishing for the period under review was carried out.The purpose of the work is to analyze the dynamics of quantitative indicators and the qualitative composition of commercial catches in freshwater bodies of Russia.Methods used: official annual data on the volume of industrial fish catch in freshwater bodies of Russia for 2014–2023 received from the territorial departments of Rosrybolovstvo were processed in accordance with modern statistical accounting standards.Novelty: new data on the state of industrial fishing in freshwater bodies of Russia for 2014–2023 are summarized and analyzed.According to the results of the analysis, it was found that there was a significant increase in industrial catch (by 3–10 times) in freshwater bodies of Russia in the period from 2014 to 2023, it was observed only in the water bodies of the West Siberian fisheries basin, mainly due to more intensive exploitation of reserves of the raw material base of small–scale species in the lake fund of the region. The remaining fisheries basins have been characterized by stagnation of catch over the past ten years, and in some basins (Western) there is a tendency to decrease it. The trend of decreasing the volume of catch of valuable fishing objects (primarily long-cycle whitefish species) has not changed over the described period, their share in the rivers of the ObIrtysh and Yenisei basins continues to decrease.Practical significance: the results of the analysis of industrial fishing in freshwater bodies of Russia for 2014– 2023 at the present stage of research allow us to assess the prospects for the development of the freshwater component of the fisheries complex in certain regions, identify problems related to the development of fishing on rivers, lakes and reservoirs and work out ways to solve them.

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State of Fish Commuinity in Ilmen Lake Under Intensive Fishery Pressure

Cited by 2 publications

References 0 publications

Evaluation of the good quality and parasitic purity of fish from lake Ladoga

Evaluation of the good quality and parasitic purity of fish from lake Ladoga

The dynamics of industrial fish catches in inland waters of Russia in 2014–2023

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