Problems of fisheries最新文献

Challenges in collecting age composition data from commercial catches of the Barents sea bottom fishes 从巴伦支海底层鱼类商业渔获物中收集年龄组成数据的挑战

Problems of fisheries Pub Date : 2024-03-11 DOI: 10.36038/0234-2774-2024-25-1-153-160

Yu. A. Kovalev, N. Yaragina, A. Chetyrkin

引用次数: 0

Bream in the rivers of the Oka Basin 奥卡盆地河流中的鳊鱼

Problems of fisheries Pub Date : 2024-03-11 DOI: 10.36038/0234-2774-2024-25-1-67-82

A. D. Bykov

{"title":"Bream in the rivers of the Oka Basin","authors":"A. D. Bykov","doi":"10.36038/0234-2774-2024-25-1-67-82","DOIUrl":"https://doi.org/10.36038/0234-2774-2024-25-1-67-82","url":null,"abstract":"Bream in the river systems of the Oka basin is widespread, including tributaries of the third order. This representative of cyprinid fish is numerous mainly in the most full-flowing rivers with a length of more than 500 km. The age composition of bream from net catches in the Oka over a long period of observations did not exceed 14 age groups, and fish older than 12+ were not recorded in the Klyazma and Moscow rivers. The growth of bream in the Oka, Klyazma, and Moscow rivers does not differ significantly on average, due to seasonal bream migrations and similar feeding conditions. The main factor influencing the decrease in the number of bream in the Oka and Klyazma is a long period of low spring floods, which prevents flooding of the high river floodplain and sharply reduces the efficiency of its spawning, especially in the upper reaches of the Oka and Klyazma rivers. An adaptive feature of the reproductive biology of bream in the upper reaches of these rivers is the extended spawning migration of mature fish upstream, where the ripal vegetation in riverbeds serves as a spawning substrate for it. Bream in the rivers of the Oka basin is currently a secondary object of amateur fishing and one of the main species in poaching catches.","PeriodicalId":129863,"journal":{"name":"Problems of fisheries","volume":"18 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140253145","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

Composition, structure and possible prospects for the use of bycatch on the trawl fishing of the atka mackerel Pleurogrammus monopterygius (Hexagrammidae) 拖网捕捞阿特卡马鲛（Pleurogrammus monopterygius）（Hexagrammidae）副渔获物的组成、结构和可能的利用前景

Problems of fisheries Pub Date : 2024-03-11 DOI: 10.36038/0234-2774-2024-25-1-93-118

Y. Kurbanov

引用次数: 0

At the grand Newfoundland bank and Flemish cap bank 在大纽芬兰银行和佛兰德帽银行

Problems of fisheries Pub Date : 2024-03-11 DOI: 10.36038/0234-2774-2024-25-1-119-130

K. Y. Fomin, I. V. Mishurova, V. A. Belyaev

引用次数: 0

Patterns of variability of species composition of catches from the russian fishing vessels in the south-eastern Pacific ocean for 2015–2022 2015-2022年俄罗斯渔船在东南太平洋的渔获物种构成变化模式

Problems of fisheries Pub Date : 2024-03-11 DOI: 10.36038/0234-2774-2024-25-1-131-142

M. M. Dubishchuk

{"title":"Patterns of variability of species composition of catches from the russian fishing vessels in the south-eastern Pacific ocean for 2015–2022","authors":"M. M. Dubishchuk","doi":"10.36038/0234-2774-2024-25-1-131-142","DOIUrl":"https://doi.org/10.36038/0234-2774-2024-25-1-131-142","url":null,"abstract":"The work provides information on the patterns of species composition of catches from the Russian fishing vessels conducted fishing of jack mackerel (Trachurus murphyi Nichols 1920), chub mackerel (Scomber japonicus Houttuyn 1782) and redbait (Emmelichthys spp.) in the South-Eastern Pacific Ocean outside the economic zones of the coastal States. According to scientific observations, an analysis of the composition of species caught by the Russian fishing vessels is given. When fishing in the pelagic zone over ocean depths, jack mackerel was the main target species, chub mackerel formed the bycatch. At the same time, the proportion of chub mackerel in catches in the northern parts was higher than in the southern ones. When fishing on seamounts of the Nazca Ridge, catches were dominated by redbait with jack mackerel and alfonsino (Beryx splendens Lowe, 1834) as bycatch. According to the similarity of the species composition of catches, three areas – 1) all the Southern and Central subareas and part of the Northern subarea; 2) seamounts of Nazca ridge; 3) part of the Northern subarea near the border of the EEZ of Peru between 17–20°S, were singled out using the cluster analysis method.","PeriodicalId":129863,"journal":{"name":"Problems of fisheries","volume":"82 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140251935","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

State regulation of fisheries Russian and mechanisms for its implementation 俄罗斯渔业国家条例及其实施机制

Problems of fisheries Pub Date : 2024-03-11 DOI: 10.36038/0234-2774-2024-25-1-177-187

S. A. Kravtsov

引用次数: 0

Differentiation populations of the saffron cod Eleginus gracilis (Gadidae) of the cape Terpeniya, south-east and north-west of Sakhalin island using biological tags 使用生物标签区分萨哈林岛东南部和西北部捷尔佩尼亚海角的红花鳕鱼（鳕科）种群

Problems of fisheries Pub Date : 2024-03-11 DOI: 10.36038/0234-2774-2024-25-1-83-92

E. Frolov, S. V. Novokreschennykh, A. V. Metlenkov

引用次数: 0

Fisheries profile of economic cooperation on the African continent 非洲大陆经济合作渔业概况

Problems of fisheries Pub Date : 2024-03-11 DOI: 10.36038/0234-2774-2024-25-1-161-176

V. D. Rudashevsky, T. O. Mukhamedova, A. O. Pavlova

引用次数: 0

Azov sea fishes stock assessment by swept area method through bootstrap 亚速海鱼类种群评估--通过引导法的扫区法

Problems of fisheries Pub Date : 2024-03-11 DOI: 10.36038/0234-2774-2024-25-1-143-152

M. M. Piatinskii, V. N. Belousov, S. N. Kulba

{"title":"Azov sea fishes stock assessment by swept area method through bootstrap","authors":"M. M. Piatinskii, V. N. Belousov, S. N. Kulba","doi":"10.36038/0234-2774-2024-25-1-143-152","DOIUrl":"https://doi.org/10.36038/0234-2774-2024-25-1-143-152","url":null,"abstract":"Recently driven changes in habitat conditions in the Azov Sea make classic applications of swept area method inconsistent. Swept area stock assessment method modification for stock estimation of aquatic biological resources through nonparametric bootstrap is presented. New approach is tested against classic calculated results of swept area method for next fish species: Azov anchovy, tulka, turbot and Black-Azov sea shad according to data collected during 2022. Results comparison of classic and modified through bootstrap stock assessment methods leads no significant deviations in mean value estimation. Maximum difference between mean estimates of stock size was 3,75%. Confidential intervals width difference between reviewed methods, in general, was not significant. Most valuable difference in confidential intervals was detected in BCa approach against classic method with quantile approach (due to methodological features of BCa in bias correction procedure). The new stock assessment approach for swept area method though bootstrap permit to calculate statistically valid estimates, their confidential intervals and perform input data validation. The absence of significant differences in the results by the classical and proposed methods indicates the further applicable possibility of classic method even in normality violation in source samples. The normality requirements in methodology of classic approach, probably, is redundant.","PeriodicalId":129863,"journal":{"name":"Problems of fisheries","volume":"89 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140254187","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

Research of the species composition of the coastal ichthyocenosis of the Baltic sea within the Kaliningrad coast 加里宁格勒海岸波罗的海沿岸鱼类物种组成研究

Problems of fisheries Pub Date : 2024-03-07 DOI: 10.36038/0234-2774-2024-25-1-49-58

S. V. Shibaev, O. Novozhilov, A. Aldushin, A. S. Burbah, Y. K. Aldushina, T. S. Gulina, P. N. Baranovskij, L. S. Fedorov

引用次数: 0