Problems of fisheries最新文献_第6页

Species composition and distribution of fishes at the shallow waters of the low and middle Amur river in summer, 2018 and 2019 2018年和2019年夏季阿穆尔河中下游浅水鱼类种类组成及分布

Problems of fisheries Pub Date : 2023-04-02 DOI: 10.36038/0234-2774-2023-24-1-39-55

N. V. Kolpakov, E. Barabanshchikov, A. Shmigirilov, E. Ostrovskaya

{"title":"Species composition and distribution of fishes at the shallow waters of the low and middle Amur river in summer, 2018 and 2019","authors":"N. V. Kolpakov, E. Barabanshchikov, A. Shmigirilov, E. Ostrovskaya","doi":"10.36038/0234-2774-2023-24-1-39-55","DOIUrl":"https://doi.org/10.36038/0234-2774-2023-24-1-39-55","url":null,"abstract":"Based on the data of seine surveys (June 2018 and 2019, 57 and 38 catches), species composition and structure of fish communities of the middle and low Amur River were studied. The species richness of fish in the low Amur River is higher compared to the middle Amur River, 37 and 22 species, respectively. Upstream of the Amur River, fish biomass falls. At the beginning of summer, its average value in the low Amur was equal 1,354±0,209 g/m2, in the middle Amur – 0,324±0,058 g/m2. In the middle Amur River, the fish biomass was dominated by Hemiculter spp. (29,1%), Opsariichthys bidens (28,0%), Leuciscus waleckii (22,1%), Squalidus spp. (7,5%) and Tachysurus sinensis (3,9%). In the catches on the low Amur River, the fish biomass was dominated by Hemiculter spp. (26,2%), Leuciscus waleckii (21,0%), Hypomesus olidus (18,1%), Rhynchocypris lagowskii (7,6%), Carassius gibelio (7,2%), Rhodeus sericeus (5,0%) and Xenocypris macrolepis (4,6%). Local maxima of fish abundance were determined by the ecological preferences of most common fish species (in particular, their reopreferendum).","PeriodicalId":129863,"journal":{"name":"Problems of fisheries","volume":"320 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133006783","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}

引用次数: 0

Linear and weight growth of the baikal seal (Phoca sibirica) in 2018–2021 2018-2021年贝加尔湖海豹(Phoca sibirica)的线性和重量增长

Problems of fisheries Pub Date : 2023-04-02 DOI: 10.36038/0234-2774-2023-24-1-56-70

E. A. Boltnev

引用次数: 0

Features of the russian fishery of capelin Mallotus villosus of the Barents sea in 2018 and 2022 2018年和2022年俄罗斯巴伦支海毛鳞鱼渔业特征

Problems of fisheries Pub Date : 2023-04-02 DOI: 10.36038/0234-2774-2023-24-1-143-153

А. А. Pronyuk

引用次数: 0

Improving the cultivation of fish planting material in Central Federal district 改进中央联邦区养鱼材料的种植

Problems of fisheries Pub Date : 2023-04-02 DOI: 10.36038/0234-2774-2023-24-1-165-170

E. B. Akimov

引用次数: 1

Dynamics of the size and age composition of the arabesque greenling Pleurogrammus azonus in the pelagial of the russian waters in the sea of Japan 日本海俄罗斯水域浅海阿拉伯纹绿鱼的大小和年龄组成的动态变化

Problems of fisheries Pub Date : 2023-04-02 DOI: 10.36038/0234-2774-2023-24-1-86-98

A. Vdovin

引用次数: 0

Using sequential particle methods and non-parametric distributions in bayesian evaluations of abundance and catch at age time series 使用序列粒子方法和非参数分布在贝叶斯评估丰度和捕获量在年龄时间序列

Problems of fisheries Pub Date : 2023-04-02 DOI: 10.36038/0234-2774-2023-24-1-99-116

I. Shevchenko

{"title":"Using sequential particle methods and non-parametric distributions in bayesian evaluations of abundance and catch at age time series","authors":"I. Shevchenko","doi":"10.36038/0234-2774-2023-24-1-99-116","DOIUrl":"https://doi.org/10.36038/0234-2774-2023-24-1-99-116","url":null,"abstract":"We describe an approach to analyzing time series for two variables connected through the state model with abundance and catch data sets and cohort and catch equations as an example. First, we create a deterministic model with parameters that maximizes the closeness of given data and data generated by a model. Then, we obtain cohort stochastic models using the difference between initial and modeled data. They are represented as hidden Bayesian models with abundances as states and catches as observations. Using these models, one can evaluate posterior densities and calculate averages, deviations, etc. As a general matter, the recursive equations met by posterior densities have no analytic solutions. We describe several particle methods that may be used for density approximations and following calculations of their statistical quantities. All generated sample densities are smoothed with non-parametric kernel density estimation. The Fishmetica package was extended with functions for generating samples and weights for filtering, predicting and smoothing densities. Numerical simulations were conducted for a test data set. Several extensions of the approach are proposed including an additional option for comparing the basic models with the use of a likelihood function.","PeriodicalId":129863,"journal":{"name":"Problems of fisheries","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124371881","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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The raw material base of water biological resources in the russian waters of the Chukchi sea and its cost 楚科奇海俄罗斯水域水生物资源的原料基础及其成本

Problems of fisheries Pub Date : 2023-04-02 DOI: 10.36038/0234-2774-2023-24-1-117-142

A. V. Datsky

{"title":"The raw material base of water biological resources in the russian waters of the Chukchi sea and its cost","authors":"A. V. Datsky","doi":"10.36038/0234-2774-2023-24-1-117-142","DOIUrl":"https://doi.org/10.36038/0234-2774-2023-24-1-117-142","url":null,"abstract":"The studies carried out in this work made it possible to characterize the dynamics of the raw material base of aquatic biological resources of the Russian waters of the Chukchi Sea in 1997–2020 and evaluate its value at the present stage. The raw material base of marine fish and invertebrates varied from 5,4 to 450,1 thousand tons (with an average value of 196,7 thousand tons). It was based on marine fish – an average of 189,0 thousand tons (96,1% of all resources), stocks of invertebrates – 7,7 thousand tons (3,9%). Estimates of the commercial WBR biomass in the Chukchi Sea are approximately 24 times lower than the estimates of the resource base of the western part of the Bering Sea: 4,1 and 5,1% of the biomass of marine fish and invertebrates, respectively. Stocks of hydrobionts showed a gradual downward trend from 1997 to 2007, a low level in 2008–2017 and a sharp rise in 2018–2020. Significant growth in resources in the late 2010s led to mass walleye pollock migration to the Chukchi shelf from the Bering Sea, which led to an increase in the raw material base of WBR by 431 thousand tons and a concomitant increase in its cost by 23,7 billion rubles. The cost of the raw material base of the Russian waters of the Chukchi Sea in 2019–2020 amounted to 34–51 billion rubles, in absolute terms yielding to the Bering and Okhotsk seas by 14,0 and 31,3 times. The most valuable species of bioresources in terms of value were cod fish (walleye pollock Gadus chalcogrammus) and crabs (snow crab Chionoecetes opilio), the total contribution of which exceeds 90% of the total value of the estimated commercial stocks of the sea. With a high probability, it can be assumed that it is these types of WBR that will form the economic basis of the Russian fishery in the Chukchi Sea in the future.","PeriodicalId":129863,"journal":{"name":"Problems of fisheries","volume":"710 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127583987","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}

引用次数: 0

Results of trawl surveys in Khanka lake in 2018 and 2020 2018年和2020年汉卡湖拖网调查结果

Problems of fisheries Pub Date : 2022-12-13 DOI: 10.36038/0234-2774-2022-23-4-97-112

E. Barabanshchikov, M. E. Shapovalov

引用次数: 0

Consortiums «tumbleweeds» of the Amurskii liman

Problems of fisheries Pub Date : 2022-12-13 DOI: 10.36038/0234-2774-2022-23-4-57-66

N. V. Kolpakov, V. V. Koshelev

引用次数: 0

Results of studies of bottom communities in the Amur river basin 阿穆尔河流域底层群落研究结果

Problems of fisheries Pub Date : 2022-12-13 DOI: 10.36038/0234-2774-2022-23-4-89-96

E. Barabanshchikov

{"title":"Results of studies of bottom communities in the Amur river basin","authors":"E. Barabanshchikov","doi":"10.36038/0234-2774-2022-23-4-89-96","DOIUrl":"https://doi.org/10.36038/0234-2774-2022-23-4-89-96","url":null,"abstract":"Comprehensive studies of aquatic biota were carried out in the 30s and 40s years of the 20th century. In this regard, it was necessary to collect updated data on different groups of aquatic animals. The purpose of this work was to conduct research on the collection of zoobenthos in the area from the Amur Estuary to the city of Blagoveshchensk. The work was carried out in 2018–2020 years using a GR-91 rod grab, a Levanidov bentometer (0,4×0,4 m), and a shellfish collection frame (0,5×0,5 m). According to our observations and literature data, the distribution of benthic animals in the channel part of the Amur and floodplain lakes is greatly influenced by the level regime of the water body. The highest values of biomass in collections were given by mollusks due to their large size. Insect larvae and oligochaetes had a high abundance but low biomass due to their small size. During the work, most of the samples turned out to be empty, which is associated with periodic rises and falls in the water level. The maximum values of biomass from 0,5 to 1,0 kg/m2 were noted in areas of mollusk concentrations, mainly Nodularia douglasiae. In other places, quantitative indicators were several orders of magnitude lower, from several mg to several g/m2.","PeriodicalId":129863,"journal":{"name":"Problems of fisheries","volume":"2016 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131012820","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}

引用次数: 0