Pub Date : 2024-01-21DOI: 10.36038/2307-3497-2023-194-118-130
V. Amosova, A. Zezera
The aim of this article: analysis of information and software for forecasting of the Baltic Sea sprat stock Sprattus sprattus balticus at 22–32 ICES subdivisions in the context of the suspension of Russia’s activities in the International Council for the Exploration of the Sea (ICES).Methods used: The data of estimates of sprat abundance and biomass by hydroacoustic methods, commercial and biostatistical characteristics of the species were used to assess the stock and predict its catch in the Baltic Sea. Estimation of the sprat stock was carried out using the traditional method of virtual population analysis (VPA) adjusted according to the method of extended survival analysis (XSA) using the internationally approved VPA module software within the framework of ICES and the R software environment. The recruitment calibration program RCT3 (Recruitment calibration) was used for the abundance of recruitment (age 1 year) according to XSA and forecast. A multivariate short-term forecast was carried out at different levels of development of the total allowable catch (TAC) under the MFDP program (Multi Fleet Deterministic Projection). As an alternative, the domestic software «KAFKA» was tested.Novelty: for the first time, estimates of the sprat stock were made in the conditions of limited access of Russian specialists to primary data in ICES in full.Result: modern methodological and informational support of scientific research in the Baltic Sea in the conditions of the suspension of the activities of Russian experts in ICES makes it possible to obtain information in the minimum necessary amount for assessing the stock of sprat and predicting its catch. Modeling with the «KAFKA» software showed satisfactory results.Practical significance: The current level of information support for forecasting the state of the stock and catch of sprat in the Baltic Sea will allow solving a complex of problems of managing this resource in modern conditions.
{"title":"A new approach to assessing and forecasting the stock of sprat in the Baltic Sea in modern conditions","authors":"V. Amosova, A. Zezera","doi":"10.36038/2307-3497-2023-194-118-130","DOIUrl":"https://doi.org/10.36038/2307-3497-2023-194-118-130","url":null,"abstract":"The aim of this article: analysis of information and software for forecasting of the Baltic Sea sprat stock Sprattus sprattus balticus at 22–32 ICES subdivisions in the context of the suspension of Russia’s activities in the International Council for the Exploration of the Sea (ICES).Methods used: The data of estimates of sprat abundance and biomass by hydroacoustic methods, commercial and biostatistical characteristics of the species were used to assess the stock and predict its catch in the Baltic Sea. Estimation of the sprat stock was carried out using the traditional method of virtual population analysis (VPA) adjusted according to the method of extended survival analysis (XSA) using the internationally approved VPA module software within the framework of ICES and the R software environment. The recruitment calibration program RCT3 (Recruitment calibration) was used for the abundance of recruitment (age 1 year) according to XSA and forecast. A multivariate short-term forecast was carried out at different levels of development of the total allowable catch (TAC) under the MFDP program (Multi Fleet Deterministic Projection). As an alternative, the domestic software «KAFKA» was tested.Novelty: for the first time, estimates of the sprat stock were made in the conditions of limited access of Russian specialists to primary data in ICES in full.Result: modern methodological and informational support of scientific research in the Baltic Sea in the conditions of the suspension of the activities of Russian experts in ICES makes it possible to obtain information in the minimum necessary amount for assessing the stock of sprat and predicting its catch. Modeling with the «KAFKA» software showed satisfactory results.Practical significance: The current level of information support for forecasting the state of the stock and catch of sprat in the Baltic Sea will allow solving a complex of problems of managing this resource in modern conditions.","PeriodicalId":486863,"journal":{"name":"Trudy VNIRO","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139609769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-20DOI: 10.36038/2307-3497-2023-194-64-70
A. V. Polteva, E. V. Galanina, D. A. Viktorov, A. A. Lomakin
The aim of the work was to select and test several pairs of primers to identify the causative agent of A. salmonicida salmon furunculosis by PCR.The methods: six bacterial cultures isolated from pre-spawning chum salmon with and without external signs of furunculosis, caught in rivers in the south of Sakhalin, were used as test cultures during the testing of primers. Ready-made kits D-Cells‑250 and Intifica TaqM master mix were used to isolate bacterial DNA and prepare PCR mixtures. Amplification was carried out in a thermocycler T‑100 ThermoCycler (Bio-Rad). Detection of PCR products was carried out by electrophoresis in 1.5% agarose gel in triacetate buffer (TAE). To view the results and document them, the Bio-Rad Gel DOC XR+system was used.The results: the species specificity of three pairs of primers selected for the identification of the causative agent of furunculosis by PCR was experimentally confirmed. Testing of the selected primers was carried out on bacterial cultures isolated from pre-spawning chum salmon individuals with and without manifestations of furunculosis. According to the results of testing, all bacterial isolates were assigned to the species A. salmonicida.Novelty of the work: for the first time, a comparison of primers proposed by several authors for the identification of the causative agent of furunculosis was performed on bacterial cultures isolated from salmon of the Far Eastern region.Practical significance: the obtained results were used to prepare methodological guidelines for the identification of the causative agent of salmon furunculosis A. salmonicida by PCR, which reduces the time of diagnosis of the disease.
方法：在测试引物时，使用了从萨哈林岛南部河流中捕获的产卵前大马哈鱼身上分离出的六种细菌培养物作为测试培养物，这些培养物有的患有大马哈鱼疖病，有的没有疖病的外部症状。使用现成的 D-Cells-250 试剂盒和 Intifica TaqM 母液来分离细菌 DNA 和制备 PCR 混合物。扩增在热循环仪 T-100 ThermoCycler（Bio-Rad）中进行。PCR 产物在三醋酸缓冲液（TAE）中的 1.5%琼脂糖凝胶中电泳检测。使用 Bio-Rad Gel DOC XR+ 系统查看和记录结果。结果：实验证实了用于通过 PCR 鉴定疖病病原体的三对引物的物种特异性。对所选引物的测试是在从产卵前大马哈鱼个体中分离出的细菌培养物上进行的，这些个体有的患有毛囊虫病，有的则没有。工作的新颖性：首次在从远东地区鲑鱼分离的细菌培养物上对多位作者提出的用于鉴定鲑鱼疖病病原体的引物进行了比较。实用意义：利用所获得的结果制定了通过 PCR 鉴定鲑鱼疖病病原体 A. salmonicida 的方法指南，从而缩短了疾病的诊断时间。
{"title":"Results of approbation of three pairs of primers for identification of the causative agent of salmon furunculosis Aeromonas salmonicida by PCR","authors":"A. V. Polteva, E. V. Galanina, D. A. Viktorov, A. A. Lomakin","doi":"10.36038/2307-3497-2023-194-64-70","DOIUrl":"https://doi.org/10.36038/2307-3497-2023-194-64-70","url":null,"abstract":"The aim of the work was to select and test several pairs of primers to identify the causative agent of A. salmonicida salmon furunculosis by PCR.The methods: six bacterial cultures isolated from pre-spawning chum salmon with and without external signs of furunculosis, caught in rivers in the south of Sakhalin, were used as test cultures during the testing of primers. Ready-made kits D-Cells‑250 and Intifica TaqM master mix were used to isolate bacterial DNA and prepare PCR mixtures. Amplification was carried out in a thermocycler T‑100 ThermoCycler (Bio-Rad). Detection of PCR products was carried out by electrophoresis in 1.5% agarose gel in triacetate buffer (TAE). To view the results and document them, the Bio-Rad Gel DOC XR+system was used.The results: the species specificity of three pairs of primers selected for the identification of the causative agent of furunculosis by PCR was experimentally confirmed. Testing of the selected primers was carried out on bacterial cultures isolated from pre-spawning chum salmon individuals with and without manifestations of furunculosis. According to the results of testing, all bacterial isolates were assigned to the species A. salmonicida.Novelty of the work: for the first time, a comparison of primers proposed by several authors for the identification of the causative agent of furunculosis was performed on bacterial cultures isolated from salmon of the Far Eastern region.Practical significance: the obtained results were used to prepare methodological guidelines for the identification of the causative agent of salmon furunculosis A. salmonicida by PCR, which reduces the time of diagnosis of the disease.","PeriodicalId":486863,"journal":{"name":"Trudy VNIRO","volume":"77 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139610956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-20DOI: 10.36038/2307-3497-2023-194-96-107
I. Volvenko
Aim. Find a simple way to transfer the average per capita consumption of fish products (kg/person/year) from the raw mass to the mass of marketable products and vice versa.Methods. Statistical processing of official data on the consumption of fish products in the USSR and the Russian Federation, published by Rosstat (Russian Federal State Statistics Service) and FAO (Food and Agriculture Organization of the United Nations) for 58 years, was made using the least squares method.Results. Two-parameter equations are found that best describe the relationship between the average per capita consumption of fish products in the mass of raw fish and in the mass of commercial products ready for consumption, as well as coefficients for simplified approximate quick calculations of the mass of consumed raw fish by the mass of commercial products and the mass of consumed commercial products by mass of raw fish.Novelty. Based on the results of the original analysis of the material, a new method for recalculating the Russian per capita consumption of fish products in the mass of raw fish by the mass of consumed commercial products and vice versa was obtained for the first time.Practical significance. Restoration of long-term series of consumption and targets for food security, the efficiency of the functioning of the fishery complex, and the social policy of the state. The article may be useful to economists, marketers, sociologists, medicals, businessmen, officials and politicians.
{"title":"Russian per capita consumption of fish products in raw mass or marketable product weight: how to recalculate back and forth","authors":"I. Volvenko","doi":"10.36038/2307-3497-2023-194-96-107","DOIUrl":"https://doi.org/10.36038/2307-3497-2023-194-96-107","url":null,"abstract":"Aim. Find a simple way to transfer the average per capita consumption of fish products (kg/person/year) from the raw mass to the mass of marketable products and vice versa.Methods. Statistical processing of official data on the consumption of fish products in the USSR and the Russian Federation, published by Rosstat (Russian Federal State Statistics Service) and FAO (Food and Agriculture Organization of the United Nations) for 58 years, was made using the least squares method.Results. Two-parameter equations are found that best describe the relationship between the average per capita consumption of fish products in the mass of raw fish and in the mass of commercial products ready for consumption, as well as coefficients for simplified approximate quick calculations of the mass of consumed raw fish by the mass of commercial products and the mass of consumed commercial products by mass of raw fish.Novelty. Based on the results of the original analysis of the material, a new method for recalculating the Russian per capita consumption of fish products in the mass of raw fish by the mass of consumed commercial products and vice versa was obtained for the first time.Practical significance. Restoration of long-term series of consumption and targets for food security, the efficiency of the functioning of the fishery complex, and the social policy of the state. The article may be useful to economists, marketers, sociologists, medicals, businessmen, officials and politicians.","PeriodicalId":486863,"journal":{"name":"Trudy VNIRO","volume":"19 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139610758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-20DOI: 10.36038/2307-3497-2023-194-79-95
M. Y. Kuznetsov, P. S. Gushcherov, V. I. Shevtsov
The purpose of the work: identification of acoustic activity of belugas in conditions of aviary keeping and justification of the possibility of using their signals in fishing.The material of research was digital audio recordings of hydroacoustic signals of belugas collected from 2016 to 2018.Methods used: analysis of hydroacoustic data, visualization of the daily acoustic activity of belugas in different seasons, identification of stereotypes of acoustic behavior and characteristic signals in captive conditions and during fish hunting. Novelty: for the first time a substantiation for the possibility of using signals of one of the species of toothed whales — belugas registered in the captive conditions, to influence on the behavior of hydrobionts and solve practical problems of fishing and fish protection is given.Results: the highest acoustic activity of white whales is observed during the day and noticeably decreases at night with increase and decrease in the morning and evening hours. Maximum acoustic activity precedes the feeding of dolphins.The most common tones are those containing the fundamental frequency and harmonics. Characteristic features of the sounds are high variability of duration from 0.25 to 2.5 s, pronounced frequency components in the 500–2500 Hz spectrum zones, amplitude and frequency modulation, sound pressure levels of the signal up to 500 Pa /1 m.Acoustic activity of belugas during fish hunting and in the period preceding feeding in captive conditions, stereotypical. Typical are low-frequency frequency-modulated calls and whistles in the hearing range of fish, as well as a curtain of air bubbles and body and tail slaps. Possible ways of using beluga whale signals to increase the efficiency of fishing are proposed.Practical significance: the results of the study open up the possibility of using the signals of belugas to remotely control the movement of fish, create artificial concentrations and deterrent of hydrobionts in the intended areas.
{"title":"Studies of the acoustic activity of white whales (in captive conditions and the possibility of their signals using to control behavior of fish in fishing process","authors":"M. Y. Kuznetsov, P. S. Gushcherov, V. I. Shevtsov","doi":"10.36038/2307-3497-2023-194-79-95","DOIUrl":"https://doi.org/10.36038/2307-3497-2023-194-79-95","url":null,"abstract":"The purpose of the work: identification of acoustic activity of belugas in conditions of aviary keeping and justification of the possibility of using their signals in fishing.The material of research was digital audio recordings of hydroacoustic signals of belugas collected from 2016 to 2018.Methods used: analysis of hydroacoustic data, visualization of the daily acoustic activity of belugas in different seasons, identification of stereotypes of acoustic behavior and characteristic signals in captive conditions and during fish hunting. Novelty: for the first time a substantiation for the possibility of using signals of one of the species of toothed whales — belugas registered in the captive conditions, to influence on the behavior of hydrobionts and solve practical problems of fishing and fish protection is given.Results: the highest acoustic activity of white whales is observed during the day and noticeably decreases at night with increase and decrease in the morning and evening hours. Maximum acoustic activity precedes the feeding of dolphins.The most common tones are those containing the fundamental frequency and harmonics. Characteristic features of the sounds are high variability of duration from 0.25 to 2.5 s, pronounced frequency components in the 500–2500 Hz spectrum zones, amplitude and frequency modulation, sound pressure levels of the signal up to 500 Pa /1 m.Acoustic activity of belugas during fish hunting and in the period preceding feeding in captive conditions, stereotypical. Typical are low-frequency frequency-modulated calls and whistles in the hearing range of fish, as well as a curtain of air bubbles and body and tail slaps. Possible ways of using beluga whale signals to increase the efficiency of fishing are proposed.Practical significance: the results of the study open up the possibility of using the signals of belugas to remotely control the movement of fish, create artificial concentrations and deterrent of hydrobionts in the intended areas.","PeriodicalId":486863,"journal":{"name":"Trudy VNIRO","volume":"5 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139611152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-20DOI: 10.36038/2307-3497-2023-194-71-78
E. B. Fursenko, I. Burlachenko
The purpose of the work is to describe the morphological features and time frame of otolith formation in pike embryos for subsequent use of otolith marking for juveniles released to the nature habitats. Observations of the development of eggs were carried out in aquarium conditions. The recirculating aquaculture system was used for incubation of pike eggs. The development of embryos and larvae, as well as preparations of otoliths, were examined using light microscope equipped with digital camera. The sizes of developing embryos, larvae and otoliths were measured in photographs, the scale of the images was determined using reference scale. It was found that the beginnings of hearing organs in form of otic vesicle are formed in pike embryos at the stage of organogenesis on the 6th day of development at the temperature of 9–13 °С. The detectable sign of the processes is the beginning of pigmentation of the embryo’s eyes. The formation of otoliths such as sagittae and lapilluses due to the fusion of primordial spherules and enlargement of globules continues throughout the entire period of embryonic development. By the moment of pre-larvae hatching (on the 10th day after fertilization), they have two pairs of otoliths (sagittae and lapilluses), the average size of which is 66,3±5,1 microns and 53,3±5,3, respectively. The appearance of diurnal rings on otoliths is observed before hatching, at the stage of the mobile embryo or on the first day after hatching. The data on the age of formation of otoliths and appearance of diurnal rings will be used to develop techniques of marking of pike juveniles in the hatcheries.
{"title":"On the formation of the pike otoliths","authors":"E. B. Fursenko, I. Burlachenko","doi":"10.36038/2307-3497-2023-194-71-78","DOIUrl":"https://doi.org/10.36038/2307-3497-2023-194-71-78","url":null,"abstract":"The purpose of the work is to describe the morphological features and time frame of otolith formation in pike embryos for subsequent use of otolith marking for juveniles released to the nature habitats. Observations of the development of eggs were carried out in aquarium conditions. The recirculating aquaculture system was used for incubation of pike eggs. The development of embryos and larvae, as well as preparations of otoliths, were examined using light microscope equipped with digital camera. The sizes of developing embryos, larvae and otoliths were measured in photographs, the scale of the images was determined using reference scale. It was found that the beginnings of hearing organs in form of otic vesicle are formed in pike embryos at the stage of organogenesis on the 6th day of development at the temperature of 9–13 °С. The detectable sign of the processes is the beginning of pigmentation of the embryo’s eyes. The formation of otoliths such as sagittae and lapilluses due to the fusion of primordial spherules and enlargement of globules continues throughout the entire period of embryonic development. By the moment of pre-larvae hatching (on the 10th day after fertilization), they have two pairs of otoliths (sagittae and lapilluses), the average size of which is 66,3±5,1 microns and 53,3±5,3, respectively. The appearance of diurnal rings on otoliths is observed before hatching, at the stage of the mobile embryo or on the first day after hatching. The data on the age of formation of otoliths and appearance of diurnal rings will be used to develop techniques of marking of pike juveniles in the hatcheries.","PeriodicalId":486863,"journal":{"name":"Trudy VNIRO","volume":"36 16","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139610322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-18DOI: 10.36038/2307-3497-2023-194-44-49
D. K. Mitrushkina, M. N. Kiseleva
The purpose of the review is to summarize modern data on the phylogenetic relationships of two sturgeon species, the North American Atlantic sturgeon Acipenser oxyrinchus and the European Atlantic sturgeon A. sturio, living in the Baltic Sea, due to the complete loss of A. sturio and the presence of a small number of individuals of A. oxyrinchus. Methods used: comparative analysis of modern literature data, a deconstruction method in which studies reflecting the molecular genetic characteristics of species have been carefully selected.The result of the review is structured data on molecular genetic studies of two sturgeon species. Combining research methods conducted with these species in one review.Significance: The results of the generalization are necessary for organizing measures to restore the lost population of sturgeon that lived in the water bodies of the Baltic Sea basin and was lost due to overfishing and changes in the habitat. A systematic approach to the molecular genetic labeling of fish both in the wild and in fish farms will ensure the control of the released juveniles, which will facilitate further research in this field of science.
{"title":"A genetic approach to assessing the biodiversity of Atlantic sturgeons Acipenser oxyrinchus and A. sturio (review of modern literature)","authors":"D. K. Mitrushkina, M. N. Kiseleva","doi":"10.36038/2307-3497-2023-194-44-49","DOIUrl":"https://doi.org/10.36038/2307-3497-2023-194-44-49","url":null,"abstract":"The purpose of the review is to summarize modern data on the phylogenetic relationships of two sturgeon species, the North American Atlantic sturgeon Acipenser oxyrinchus and the European Atlantic sturgeon A. sturio, living in the Baltic Sea, due to the complete loss of A. sturio and the presence of a small number of individuals of A. oxyrinchus. Methods used: comparative analysis of modern literature data, a deconstruction method in which studies reflecting the molecular genetic characteristics of species have been carefully selected.The result of the review is structured data on molecular genetic studies of two sturgeon species. Combining research methods conducted with these species in one review.Significance: The results of the generalization are necessary for organizing measures to restore the lost population of sturgeon that lived in the water bodies of the Baltic Sea basin and was lost due to overfishing and changes in the habitat. A systematic approach to the molecular genetic labeling of fish both in the wild and in fish farms will ensure the control of the released juveniles, which will facilitate further research in this field of science.","PeriodicalId":486863,"journal":{"name":"Trudy VNIRO","volume":"101 40","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139615884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-18DOI: 10.36038/2307-3497-2023-194-50-63
Sen Tok Kim
The purpose of this work was to characterize the biological and commercial indicators of arabesque greenling in the Kunashir Strait during 1998–2022.The basic material for the article was the data collected during the net fishery of arabesque greenling by the fleet of small-tonnage vessels of the Japanese fishing cooperative in the city of Rausu in the eastern (Russian) zone of the Kunashir Strait.Results: It is shown that the stock resources of arabesque greenling in the waters of the southern Kuril Islands have been declining during for a long period of time. Despite a short-term growth of catch per effort in 2018–2021, in 2022 there was again a decrease of fishery indicators. The negative trend of catch per effort is directly associated with the features of dynamics of arabesque greenling resources distributed in Kunashir Strait and in the Sea of Okhotsk waters of Hokkaido.Practical significance: The new information makes it possible to determine the current trends in total biomass changing for commercial fish and to clarify the fishery capabilities of the area in the nearest future.
{"title":"The dynamics of arabesque greenling fishery off south Kuril Islands","authors":"Sen Tok Kim","doi":"10.36038/2307-3497-2023-194-50-63","DOIUrl":"https://doi.org/10.36038/2307-3497-2023-194-50-63","url":null,"abstract":"The purpose of this work was to characterize the biological and commercial indicators of arabesque greenling in the Kunashir Strait during 1998–2022.The basic material for the article was the data collected during the net fishery of arabesque greenling by the fleet of small-tonnage vessels of the Japanese fishing cooperative in the city of Rausu in the eastern (Russian) zone of the Kunashir Strait.Results: It is shown that the stock resources of arabesque greenling in the waters of the southern Kuril Islands have been declining during for a long period of time. Despite a short-term growth of catch per effort in 2018–2021, in 2022 there was again a decrease of fishery indicators. The negative trend of catch per effort is directly associated with the features of dynamics of arabesque greenling resources distributed in Kunashir Strait and in the Sea of Okhotsk waters of Hokkaido.Practical significance: The new information makes it possible to determine the current trends in total biomass changing for commercial fish and to clarify the fishery capabilities of the area in the nearest future.","PeriodicalId":486863,"journal":{"name":"Trudy VNIRO","volume":"114 40","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139615641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-18DOI: 10.36038/2307-3497-2023-194-37-43
O. Vilkova, E. V. Burmistrov, Yu.A. Sveshnikov
The purpose: to obtain modern data on the distribution, abundance, size composition and biological state of the sturgeon in the middle reaches of the Lena River.Material: data of scientific accounting survey using bottom drift nets in summer 2022.The results: Siberien sturgeon is dstributed irregularly on a 400‑kilometer stretch of the river from the city of Yakutsk to the Vilyui River, with the highest average density near the Vilyui River mouth 163 ind./km2, while sturgeon densities in the areas of Yakutsk and the Aldan River mouth were 71 and 44 ind./km2 respectively. The highest density of fish with the smallest average size in the area near the Vilyui mouth indirectly indicates the presence of a separate herd in the Vilyui River. The average density of fish over the entire 400‑km area was 93 ind./km2. The sturgeon length to the end of the middle rays (ac) was from 21 to 86 cm; on average 43.4 ± 10.7 cm. The modal size class for the sturgeon in catches in 2022 was 41–50 cm (44% of the total catch). The fish weight ranged from 40 to 3800 g. The average weight of individuals was 0.557. More than 80% of fish from all catches weighed up to 700 g. The weight of fish with a length ac 62–71 cm ranged from 0,400 to 1.415 kg, on average 1.0 kg. There were only 2.5% of commercial individuals in the total harvest. Sexually mature females were noted only near the Aldan mouth, where their share was 11% that may indicate the presence of spawning grounds in its channel. In the sample of fish that underwent a complete biological analysis (one third of the catches), sexually mature males were not observed. Estimated number of sturgeon: in Yakutsk city area — 17000 ind., in the Aldan mouth area — 47000 ind., in the Vilyui mouth area — 55000 ind. The total number of Siberian sturgeon on a 400‑kilometer stretch of the Lena River was at least 120000 ind. The state and structure of sturgeon population corresponds to the average statistical retrospective data.Practical value: the results obtained will improve the efficiency of assessing the distribution and stock of sturgeon in the Lena River.
{"title":"State of the Siberian sturgeon population in the Middle Lena in summer","authors":"O. Vilkova, E. V. Burmistrov, Yu.A. Sveshnikov","doi":"10.36038/2307-3497-2023-194-37-43","DOIUrl":"https://doi.org/10.36038/2307-3497-2023-194-37-43","url":null,"abstract":"The purpose: to obtain modern data on the distribution, abundance, size composition and biological state of the sturgeon in the middle reaches of the Lena River.Material: data of scientific accounting survey using bottom drift nets in summer 2022.The results: Siberien sturgeon is dstributed irregularly on a 400‑kilometer stretch of the river from the city of Yakutsk to the Vilyui River, with the highest average density near the Vilyui River mouth 163 ind./km2, while sturgeon densities in the areas of Yakutsk and the Aldan River mouth were 71 and 44 ind./km2 respectively. The highest density of fish with the smallest average size in the area near the Vilyui mouth indirectly indicates the presence of a separate herd in the Vilyui River. The average density of fish over the entire 400‑km area was 93 ind./km2. The sturgeon length to the end of the middle rays (ac) was from 21 to 86 cm; on average 43.4 ± 10.7 cm. The modal size class for the sturgeon in catches in 2022 was 41–50 cm (44% of the total catch). The fish weight ranged from 40 to 3800 g. The average weight of individuals was 0.557. More than 80% of fish from all catches weighed up to 700 g. The weight of fish with a length ac 62–71 cm ranged from 0,400 to 1.415 kg, on average 1.0 kg. There were only 2.5% of commercial individuals in the total harvest. Sexually mature females were noted only near the Aldan mouth, where their share was 11% that may indicate the presence of spawning grounds in its channel. In the sample of fish that underwent a complete biological analysis (one third of the catches), sexually mature males were not observed. Estimated number of sturgeon: in Yakutsk city area — 17000 ind., in the Aldan mouth area — 47000 ind., in the Vilyui mouth area — 55000 ind. The total number of Siberian sturgeon on a 400‑kilometer stretch of the Lena River was at least 120000 ind. The state and structure of sturgeon population corresponds to the average statistical retrospective data.Practical value: the results obtained will improve the efficiency of assessing the distribution and stock of sturgeon in the Lena River.","PeriodicalId":486863,"journal":{"name":"Trudy VNIRO","volume":"106 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139615613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-17DOI: 10.36038/2307-3497-2023-194-27-36
A. V. Labutin, A. V. Shatsky, A. I. Buyanovsky
The purpose of the work is to assessment the state of stocks of the green sea urchin (Strongylocentrotus droebachiensis) in the coastal zone of the Barents Sea.Methods used — to achieve the set goal, standard methods for collecting hydrobiological material and calculating the abundance and biomass of hydrobionts were used.Novelty — the data obtained as a result of the research made it possible to update information on the state of the green sea urchin stocks on the coasts of Western and Eastern Murman.Results — the total and commercial reserves of sea urchin were determined on an area of 2812 thousand m2. The total stock of sea urchins was 3.58 thousand tons, the commercial one — 2.17 thousand tons. The total density of urchins in the studied water area was 32 specimens/m², the commercial one — 10.3 specimens/m². The most promising areas for fishing have been identified.Practical significance — thanks to the use of the research results, adding them to materials from other sources, it will be possible to more accurately predict the volumes and timing of fishing. Mining companies will receive more complete information about promising fishing areas and possible catch volumes.
{"title":"To the assessment of green sea urchin stocks in the coastal zone of the Barents Sea","authors":"A. V. Labutin, A. V. Shatsky, A. I. Buyanovsky","doi":"10.36038/2307-3497-2023-194-27-36","DOIUrl":"https://doi.org/10.36038/2307-3497-2023-194-27-36","url":null,"abstract":"The purpose of the work is to assessment the state of stocks of the green sea urchin (Strongylocentrotus droebachiensis) in the coastal zone of the Barents Sea.Methods used — to achieve the set goal, standard methods for collecting hydrobiological material and calculating the abundance and biomass of hydrobionts were used.Novelty — the data obtained as a result of the research made it possible to update information on the state of the green sea urchin stocks on the coasts of Western and Eastern Murman.Results — the total and commercial reserves of sea urchin were determined on an area of 2812 thousand m2. The total stock of sea urchins was 3.58 thousand tons, the commercial one — 2.17 thousand tons. The total density of urchins in the studied water area was 32 specimens/m², the commercial one — 10.3 specimens/m². The most promising areas for fishing have been identified.Practical significance — thanks to the use of the research results, adding them to materials from other sources, it will be possible to more accurately predict the volumes and timing of fishing. Mining companies will receive more complete information about promising fishing areas and possible catch volumes.","PeriodicalId":486863,"journal":{"name":"Trudy VNIRO","volume":" 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139617294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-17DOI: 10.36038/2307-3497-2023-194-7-26
S. I. Moiseev, A. M. Sennikov, S. A. Moiseeva
The purpose of the study is to establish the maximum life span (tmax) and natural mortality (M) in commercial Lithodidae using the example of the red king crab Paralithodes camtschaticus.Material and methods — after the introduction of P. camtschaticus into the Barents Sea in 1969, the dynamics of the maximum carapace width (CWmax) from the first crab catches in 1974 to 2022 was considered. The data of the authors’ own observations and the results of studies from the open press were used.Results. The retrospective dynamics of the maximum size of crabs for older ages for 1974–2022 is presented. The maximum sizes were established: in males CWmax 280–312 and 298 mm was in 2002 and 2003, and in females CWmax 210–220 mm in 1995, 1998 and in a later period.New data. Based on the fifty-year dynamics of CWmax, it was suggested that after the end of the acclimatization of P. camtschaticus in 1969, the first generation of local juveniles appeared in the area of introduction in the early 1970s; in the absence of fishing, these juveniles were able to freely reach the maximum historical size and maximum age. Males caught in 2002–2003 with CWmax 280–312 mm, could have been 30–33 years old (mean 31 years), and the age of females in 1995 with CWmax 210 mm was 20–25 years (mean 23 years). This age limit of crabs allows us to establish a natural mortality according to the formula М=3/tmax for crabs with CW ≥70–90 mm, when their natural elimination is minimal. In this case, the decrease in M in males will be 10% per year, and in females 13%.Practical significance. To estimate the commercial stock of P. camtschaticus, the values of natural mortality used today are 1.8–2.3 times higher than M established by tmax for this species in the Barents Sea. The use of a double overestimated value of M in model calculations leads to a decrease in the commercial stock of crab and, as a consequence, to a decrease in its total allowable catch.
{"title":"Estimating of the maximum life expectancy and natural mortality of the red king crab on the example of the Barents Sea population","authors":"S. I. Moiseev, A. M. Sennikov, S. A. Moiseeva","doi":"10.36038/2307-3497-2023-194-7-26","DOIUrl":"https://doi.org/10.36038/2307-3497-2023-194-7-26","url":null,"abstract":"The purpose of the study is to establish the maximum life span (tmax) and natural mortality (M) in commercial Lithodidae using the example of the red king crab Paralithodes camtschaticus.Material and methods — after the introduction of P. camtschaticus into the Barents Sea in 1969, the dynamics of the maximum carapace width (CWmax) from the first crab catches in 1974 to 2022 was considered. The data of the authors’ own observations and the results of studies from the open press were used.Results. The retrospective dynamics of the maximum size of crabs for older ages for 1974–2022 is presented. The maximum sizes were established: in males CWmax 280–312 and 298 mm was in 2002 and 2003, and in females CWmax 210–220 mm in 1995, 1998 and in a later period.New data. Based on the fifty-year dynamics of CWmax, it was suggested that after the end of the acclimatization of P. camtschaticus in 1969, the first generation of local juveniles appeared in the area of introduction in the early 1970s; in the absence of fishing, these juveniles were able to freely reach the maximum historical size and maximum age. Males caught in 2002–2003 with CWmax 280–312 mm, could have been 30–33 years old (mean 31 years), and the age of females in 1995 with CWmax 210 mm was 20–25 years (mean 23 years). This age limit of crabs allows us to establish a natural mortality according to the formula М=3/tmax for crabs with CW ≥70–90 mm, when their natural elimination is minimal. In this case, the decrease in M in males will be 10% per year, and in females 13%.Practical significance. To estimate the commercial stock of P. camtschaticus, the values of natural mortality used today are 1.8–2.3 times higher than M established by tmax for this species in the Barents Sea. The use of a double overestimated value of M in model calculations leads to a decrease in the commercial stock of crab and, as a consequence, to a decrease in its total allowable catch.","PeriodicalId":486863,"journal":{"name":"Trudy VNIRO","volume":" 1067","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139617546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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