Pub Date : 2024-01-08DOI: 10.1134/s0001437023060139
A. N. Serebryany, E. E. Khimchenko, V. V. Goncharov, L. L. Tarasov, O. E. Popov, D. V. Belov, I. P. Neshenko
Abstract
The article presents the results of studies of internal waves in the shelf zone of the Black Sea in the water area near the mouth of the Kodor River, conducted in June 2021. Spatial surveys were carried out with the Rio Grande 600 kHz ADCP, which revealed the main characteristics of currents and the presence of internal waves generated by river inflow into the sea. Internal waves were recorded on two transects oriented along the normal to the coastline and extending to depths of 100 m. The observed waves had the features of nonlinear waves, were located on the near-surface thermocline, and had heights of up to 3–6 m. Also, short-period internal waves in the form of a wave train with an apparent period of about 3.5 min were recorded by a thermistor chain in the coastal zone of the sea. The dispersion curves and eigenfunctions of internal waves were calculated by numerically solving the internal wave equation, taking into account the velocity shift in the sea. Theoretical data are compared with experimental data. The significant influence of river inflow on the parameters of the generated internal waves moving with the flow was revealed. The experimentally observed decrease in wave periods and increase in their group and phase velocities were confirmed.
摘要 本文介绍了 2021 年 6 月在科多尔河河口附近水域黑海陆架区进行的内波研究结果。使用 Rio Grande 600 kHz ADCP 进行了空间勘测，发现了水流的主要特征以及河流入海产生的内波。观测到的内波具有非线性波的特征，位于近海面温跃层上，高度可达 3-6 米。通过数值求解内波方程，计算了内波的频散曲线和特征函数，并考虑了海中的速度偏移。理论数据与实验数据进行了比较。结果表明，河水流入对随水流移动的内波参数有重大影响。实验观察到的波浪周期缩短、波群速度和相位速度增加的现象得到了证实。
{"title":"Internal Waves Generated by the Inflow of the Kodor River in the Black Sea","authors":"A. N. Serebryany, E. E. Khimchenko, V. V. Goncharov, L. L. Tarasov, O. E. Popov, D. V. Belov, I. P. Neshenko","doi":"10.1134/s0001437023060139","DOIUrl":"https://doi.org/10.1134/s0001437023060139","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The article presents the results of studies of internal waves in the shelf zone of the Black Sea in the water area near the mouth of the Kodor River, conducted in June 2021. Spatial surveys were carried out with the Rio Grande 600 kHz ADCP, which revealed the main characteristics of currents and the presence of internal waves generated by river inflow into the sea. Internal waves were recorded on two transects oriented along the normal to the coastline and extending to depths of 100 m. The observed waves had the features of nonlinear waves, were located on the near-surface thermocline, and had heights of up to 3–6 m. Also, short-period internal waves in the form of a wave train with an apparent period of about 3.5 min were recorded by a thermistor chain in the coastal zone of the sea. The dispersion curves and eigenfunctions of internal waves were calculated by numerically solving the internal wave equation, taking into account the velocity shift in the sea. Theoretical data are compared with experimental data. The significant influence of river inflow on the parameters of the generated internal waves moving with the flow was revealed. The experimentally observed decrease in wave periods and increase in their group and phase velocities were confirmed.</p>","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139398403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-08DOI: 10.1134/s0001437023060036
D. V. Dorokhov, V. V. Sivkov, S. A. Mosharov, P. B. Semenov, E. E. Ezhova, A. A. Kondrashov, E. S. Bubnova, E. P. Ponomarenko, M. A. Gerb
Abstract
Brief results of oceanological studies in the south-eastern Baltic Sea and Gulf of Finland on cruise 54 of the R/V Akademik Sergey Vavilov (2022) are presented. Hydrological, hydro- and geochemical, hydrobiological, geoecological, geological, and geophysical studies were carried out. New data on the state and dynamics of the Baltic Sea natural complexes under conditions of increasing anthropogenic pressure and climate change were obtained.
摘要介绍了 Akademik Sergey Vavilov 号考察船（2022 年）第 54 次航行在波罗的海东南部和 芬兰湾进行海洋学研究的简要结果。进行了水文、水文和地球化学、水生物、地质生态、地质和地球物理研究。获得了关于波罗的海自然综合体在人为压力和气候变化不断增加的条件下的状态和动态的新数据。
{"title":"Expeditionary Studies in the Baltic Sea on Cruise 54 of the R/V Akademik Sergey Vavilov","authors":"D. V. Dorokhov, V. V. Sivkov, S. A. Mosharov, P. B. Semenov, E. E. Ezhova, A. A. Kondrashov, E. S. Bubnova, E. P. Ponomarenko, M. A. Gerb","doi":"10.1134/s0001437023060036","DOIUrl":"https://doi.org/10.1134/s0001437023060036","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Brief results of oceanological studies in the south-eastern Baltic Sea and Gulf of Finland on cruise 54 of the R/V <i>Akademik Sergey Vavilov</i> (2022) are presented. Hydrological, hydro- and geochemical, hydrobiological, geoecological, geological, and geophysical studies were carried out. New data on the state and dynamics of the Baltic Sea natural complexes under conditions of increasing anthropogenic pressure and climate change were obtained.</p>","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":"25 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139398456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-08DOI: 10.1134/s0001437023060048
E. V. Ivanova, D. G. Borisov, A. V. Gavrikov, A. N. Demidov, A. N. Ivanenko, O. I. Kirillova, S. B. Krasheninnikova, O. V. Levchenko, N. A. Shulga
Abstract
This paper provides information on the integrated geophysical, sedimentological, and hydrophysical investigations, passing meteorological and biological observations in the Eastern Tropical Atlantic during the cruise 63 of the R/V Akademik Ioffe in October–December 2022. The preliminary scientific results are discussed.
{"title":"Investigations of the Transform Faults’ Sediment Infill, Water Masses in the Eastern Tropical Atlantic during Cruise 63 of the R/V Akademik Ioffe","authors":"E. V. Ivanova, D. G. Borisov, A. V. Gavrikov, A. N. Demidov, A. N. Ivanenko, O. I. Kirillova, S. B. Krasheninnikova, O. V. Levchenko, N. A. Shulga","doi":"10.1134/s0001437023060048","DOIUrl":"https://doi.org/10.1134/s0001437023060048","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>This paper provides information on the integrated geophysical, sedimentological, and hydrophysical investigations, passing meteorological and biological observations in the Eastern Tropical Atlantic during the cruise 63 of the R/V <i>Akademik Ioffe</i> in October–December 2022. The preliminary scientific results are discussed.</p>","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":"31 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139398479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-08DOI: 10.1134/s0001437023060103
I. V. Lyubimov, G. A. Kolyuchkina, U. V. Simakova, A. B. Basin
Abstract
The species composition and the structure of the macrophytobenthos, macrozoobenthos, and bottom sediments of Taman Bay are studied. This inlet is inhabited by seagrass Zosteramarina L. which forms vast underwater meadows here. Samples were collected in 2008–2009, before the ongoing rise of salinity in the Sea of Azov. Three main biotopes with different bottom sediment composition (sands, sands with shells, and silts) were identified. They were inhabited by four main macrobenthic biocenoses (unvegetated near-shore biocenosis, mosaic macrophyte vegetation outside the surf zone, pure eelgrass’s meadows belt, and the communities, dominated by the mobile macrozoobenthos species with low abundance of macrophytes occupying the central part of the bay). The main environmental factor associated with this distribution of the vegetation was the silt content (grain size <0.001 mm). The spatial structure of the macrozoobenthos correlated with the projective cover of Z. marina. Possible reasons for the revealed pattern in the distribution of communities are discussed.
{"title":"Benthic Biocenoses of Taman Bay (Sea of Azov)","authors":"I. V. Lyubimov, G. A. Kolyuchkina, U. V. Simakova, A. B. Basin","doi":"10.1134/s0001437023060103","DOIUrl":"https://doi.org/10.1134/s0001437023060103","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The species composition and the structure of the macrophytobenthos, macrozoobenthos, and bottom sediments of Taman Bay are studied. This inlet is inhabited by seagrass <i>Zostera</i> <i>marina</i> L. which forms vast underwater meadows here. Samples were collected in 2008–2009, before the ongoing rise of salinity in the Sea of Azov. Three main biotopes with different bottom sediment composition (sands, sands with shells, and silts) were identified. They were inhabited by four main macrobenthic biocenoses (unvegetated near-shore biocenosis, mosaic macrophyte vegetation outside the surf zone, pure eelgrass’s meadows belt, and the communities, dominated by the mobile macrozoobenthos species with low abundance of macrophytes occupying the central part of the bay). The main environmental factor associated with this distribution of the vegetation was the silt content (grain size <0.001 mm). The spatial structure of the macrozoobenthos correlated with the projective cover of <i>Z</i>. <i>marina</i>. Possible reasons for the revealed pattern in the distribution of communities are discussed.</p>","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":"81 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139398413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-08DOI: 10.1134/s0001437023320012
M. V. Flint, E. G. Arashkevich, A. V. Drits, S. G. Poyarkov, A. A. Nedospasov, T. A. Schuka
Abstract
Research on the structure and trophic characteristics of zooplankton communities of the East Siberian Sea (ESS) was performed within the program “Marine Ecosystems of the Siberian Arctic” during cruise 69 of the R/V Akademik Mstislav Keldysh. The material was collected on two quasimeridional transects conducted in the latitudinal range ~71°00′–75°30′ N from the inner shelf adjacent to the Indigirka and Kolyma outfalls to the outer shelf during September 5–9, 2017. The list of species and larger taxa, as well as their biomass and trophic characteristics, are presented, and the peculiarities of cross-shelf distribution in relation to the conditions of the pelagic environment are described. The obtained estimates of the mezoplankton biomass in the ESS are on the whole within the range typical of the rest of the Siberian Seas in summer–fall. It has been established that mezoplankton communities of the western and eastern ESS significantly differ in quantitative characteristics, the role of dominant species and taxonomic groups in biomass, grazing impact of mesoplankton on the phytoplankton biomass and production, and features of the cross-shelf distribution of these characteristics. The boundary between the communities with different structural functional characteristics is located approximately at 160°–163° E. A conclusion is made that analysis of climatic and seasonal changes in ESS mezoplankton should be examined with allowance for the principal differences between pelagic biotopes and communities of the western and eastern parts of the basin.
{"title":"Structure and Trophic Characteristics of Zooplankton Communities of the East Siberian Sea","authors":"M. V. Flint, E. G. Arashkevich, A. V. Drits, S. G. Poyarkov, A. A. Nedospasov, T. A. Schuka","doi":"10.1134/s0001437023320012","DOIUrl":"https://doi.org/10.1134/s0001437023320012","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Research on the structure and trophic characteristics of zooplankton communities of the East Siberian Sea (ESS) was performed within the program “Marine Ecosystems of the Siberian Arctic” during cruise 69 of the R/V <i>Akademik Mstislav Keldysh</i>. The material was collected on two quasimeridional transects conducted in the latitudinal range ~71°00′–75°30′ N from the inner shelf adjacent to the Indigirka and Kolyma outfalls to the outer shelf during September 5–9, 2017. The list of species and larger taxa, as well as their biomass and trophic characteristics, are presented, and the peculiarities of cross-shelf distribution in relation to the conditions of the pelagic environment are described. The obtained estimates of the mezoplankton biomass in the ESS are on the whole within the range typical of the rest of the Siberian Seas in summer–fall. It has been established that mezoplankton communities of the western and eastern ESS significantly differ in quantitative characteristics, the role of dominant species and taxonomic groups in biomass, grazing impact of mesoplankton on the phytoplankton biomass and production, and features of the cross-shelf distribution of these characteristics. The boundary between the communities with different structural functional characteristics is located approximately at 160°–163° E. A conclusion is made that analysis of climatic and seasonal changes in ESS mezoplankton should be examined with allowance for the principal differences between pelagic biotopes and communities of the western and eastern parts of the basin.</p>","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":"28 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139398458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-08DOI: 10.1134/s0001437023060061
O. I. Kirillova
Abstract
The data of accompanying observations of the spatial distribution, species composition, and abundance of cetaceans in the southern part of the Atlantic and Indian oceans and in the coastal waters of Antarctica in the austral autumn of 2021 are presented. In total, 3 species of whales (82 sightings, 136 individuals), 1 species of beaked (1 sighting, 4 individuals), and 6 species of dolphins (15 sightings, 324 individuals) were recorded in the research area. In total, cetaceans were observed 98 times and 464 individuals were recorded. As in previous years, humpback whales Megaptera novaeangliae predominated (58.82%); they are successfully restoring their numbers, although they suffered greatly during whaling in the 18th–20th centuries. Antarctic minke whales Balaenoptera bonaerensis made up 21.32%, and fin whales Balaenoptera physalus, 19.85% of all whales. Southern right whale dolphins (83.33%) prevailed among all dolphins.
{"title":"Species Composition and Distribution of Cetaceans in the Atlantic and Indian Sectors of the Southern Ocean","authors":"O. I. Kirillova","doi":"10.1134/s0001437023060061","DOIUrl":"https://doi.org/10.1134/s0001437023060061","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The data of accompanying observations of the spatial distribution, species composition, and abundance of cetaceans in the southern part of the Atlantic and Indian oceans and in the coastal waters of Antarctica in the austral autumn of 2021 are presented. In total, 3 species of whales (82 sightings, 136 individuals), 1 species of beaked (1 sighting, 4 individuals), and 6 species of dolphins (15 sightings, 324 individuals) were recorded in the research area. In total, cetaceans were observed 98 times and 464 individuals were recorded. As in previous years, humpback whales <i>Megaptera novaeangliae</i> predominated (58.82%); they are successfully restoring their numbers, although they suffered greatly during whaling in the 18th–20th centuries. Antarctic minke whales <i>Balaenoptera bonaerensis</i> made up 21.32%, and fin whales <i>Balaenoptera physalus</i>, 19.85% of all whales. Southern right whale dolphins (83.33%) prevailed among all dolphins.</p>","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":"140 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139398605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-08DOI: 10.1134/s0001437023320024
A. Yu. Miroshnikov, En. E. Asadulin, A. V. Kudikov, R. A. Aliev, V. Yu. Fedulov, V. A. Khvostikov, M. V. Flint
Abstract
The article presents the results of studying specific organomineral formations—cryoconite sediments—samples of which were taken on the surface of the Witte Glacier (Medvezhiy Bay, Novaya Zemlya) on cruise 76 of the R/V Akademik Mstislav Keldysh. The specific activities of 137Cs, 241Am, 207Bi, 210Pb, and 7Be were measured in 14 samples. Analysis of the materials suggests that cryoconite contains radioactive contamination deposited in the glacier in the period from September 1957 to December 1962 as a result of atmospheric nuclear explosions at the Sukhoy Nos test site, located 100 km from the glacier. Extremely high Bi, Ag, Sb, Mo, Pb, Sn contents and a strong correlation with anthropogenic radionuclides may indicate the technogenic emission of these elements during the destructive impact of nuclear explosions on bedrock, the metallogenic specialization of which corresponds to rich polymetallic mineralization.
{"title":"Radiation-Geochemical Characteristics of Cryoconite Sediments on the Witte Glacier (Novaya Zemlya Archipelago)","authors":"A. Yu. Miroshnikov, En. E. Asadulin, A. V. Kudikov, R. A. Aliev, V. Yu. Fedulov, V. A. Khvostikov, M. V. Flint","doi":"10.1134/s0001437023320024","DOIUrl":"https://doi.org/10.1134/s0001437023320024","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The article presents the results of studying specific organomineral formations—cryoconite sediments—samples of which were taken on the surface of the Witte Glacier (Medvezhiy Bay, Novaya Zemlya) on cruise 76 of the R/V <i>Akademik Mstislav Keldysh</i>. The specific activities of <sup>137</sup>Cs, <sup>241</sup>Am, <sup>207</sup>Bi, <sup>210</sup>Pb, and <sup>7</sup>Be were measured in 14 samples. Analysis of the materials suggests that cryoconite contains radioactive contamination deposited in the glacier in the period from September 1957 to December 1962 as a result of atmospheric nuclear explosions at the Sukhoy Nos test site, located 100 km from the glacier. Extremely high Bi, Ag, Sb, Mo, Pb, Sn contents and a strong correlation with anthropogenic radionuclides may indicate the technogenic emission of these elements during the destructive impact of nuclear explosions on bedrock, the metallogenic specialization of which corresponds to rich polymetallic mineralization.</p>","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":"39 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139398377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-08DOI: 10.1134/s000143702306005x
I. G. Kantarzhi
Abstract
Changes in the coastal zone under the influence of currents of different nature and wind waves are being investigated. A sandy beach located in the water area of the “Park of the 300th Anniversary of St. Petersburg”, the Neva Bay of the Gulf of Finland of the Baltic Sea, is considered as an object. The beach is actively affected by wind waves and eventually washes away with the intensity of the retreat of the shore of about 4 m per year. For numerical modeling, a set of models is used: SWAN–wind-wave model and COASTOX-UN–a two-dimensional model of currents, sediment transport and bottom reformation. It was developed a model of the Neva Bay and the mouth of the Neva River from the Flood Prevention Facility Complex in the west to the river Neva near the Liteiny Bridge in the east. Based on the reanalysis of wind data, 36 strong storms were selected for a five-year period from 2014 to 2018, for the sequence of which numerical modeling of waves, currents and lithodynamic processes was carried out. It was obtained balances of alluvial and washouts after a ten-years simulated period for beach sectors. To verify the results, satellite images of the modeling area are used, it was found that the model adequately describes the main observed trends in the development of the beach.
{"title":"Forecast of the Dynamics of a Sandy Beach in Complexed Hydrodynamic Conditions","authors":"I. G. Kantarzhi","doi":"10.1134/s000143702306005x","DOIUrl":"https://doi.org/10.1134/s000143702306005x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Changes in the coastal zone under the influence of currents of different nature and wind waves are being investigated. A sandy beach located in the water area of the “Park of the 300th Anniversary of St. Petersburg”, the Neva Bay of the Gulf of Finland of the Baltic Sea, is considered as an object. The beach is actively affected by wind waves and eventually washes away with the intensity of the retreat of the shore of about 4 m per year. For numerical modeling, a set of models is used: SWAN–wind-wave model and COASTOX-UN–a two-dimensional model of currents, sediment transport and bottom reformation. It was developed a model of the Neva Bay and the mouth of the Neva River from the Flood Prevention Facility Complex in the west to the river Neva near the Liteiny Bridge in the east. Based on the reanalysis of wind data, 36 strong storms were selected for a five-year period from 2014 to 2018, for the sequence of which numerical modeling of waves, currents and lithodynamic processes was carried out. It was obtained balances of alluvial and washouts after a ten-years simulated period for beach sectors. To verify the results, satellite images of the modeling area are used, it was found that the model adequately describes the main observed trends in the development of the beach.</p>","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":"74 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139398330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-08DOI: 10.1134/s0001437023060152
V. B. Ushivtsev, V. V. Sayapin, E. P. Oleynikov, M. L. Galaktionova, S. A. Kotenkov
Abstract
The latitudinal distribution of the ctenophores Mnemiopsis leidyi A. Agassiz, 1865, and Beroe ovata Bruguière, 1789, in the Russian sector of the Caspian Sea has different boundaries for their ranges. Studies on the occurrence of ctenophores in the water column have demonstrated that each species has a characteristic temperature limit of its vertical distribution. Studies of interactions between ctenophores showed considerable suppression of the abundance of M. leidyi (particularly of smaller individuals) by B. ovata.
摘要里海俄罗斯段的栉水母 Mnemiopsis leidyi A. Agassiz（1865 年）和 Beroe ovata Bruguière（1789 年）的纬度分布有不同的范围界限。对栉水母在水体中出现情况的研究表明，每个物种的垂直分布都有其特有的温度极限。对栉水母之间相互作用的研究表明，B. ovata 对 M. leidyi（尤其是较小个体）的数量有相当大的抑制作用。
{"title":"Population Status of the Ctenophores Mnemiopsis Leidyi Agassiz, 1865 and Beroe Ovata Bruguiere, 1789 in Waters of the North and Middle Caspian Western Shelf in August–September, 2022","authors":"V. B. Ushivtsev, V. V. Sayapin, E. P. Oleynikov, M. L. Galaktionova, S. A. Kotenkov","doi":"10.1134/s0001437023060152","DOIUrl":"https://doi.org/10.1134/s0001437023060152","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The latitudinal distribution of the ctenophores <i>Mnemiopsis leidyi</i> A. Agassiz, 1865, and <i>Beroe ovata</i> Bruguière, 1789, in the Russian sector of the Caspian Sea has different boundaries for their ranges. Studies on the occurrence of ctenophores in the water column have demonstrated that each species has a characteristic temperature limit of its vertical distribution. Studies of interactions between ctenophores showed considerable suppression of the abundance of <i>M. leidyi</i> (particularly of smaller individuals) by <i>B. ovata</i>.</p>","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":"88 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139398414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-08DOI: 10.1134/s0001437023060097
I. V. Logominova, A. V. Agafonov, V. A. Litvin
Abstract
The article studies the bottlenose dolphin community in coastal waters of the Karadag Reserve (southeastern Crimea). Observations and acoustic recordings were carried out in 2015–2017 and 2020–2022. To identify bottlenose dolphins, we mainly used the method developed by us for acoustic recording of bottlenose dolphins by individual sound signals: signature whistles. This identification method makes it possible to fairly accurately count the population, observe the movements of bottlenose dolphins, and reveal the relationships between individuals.
{"title":"Ethological and Acoustic Studies of Bottlenose Dolphins (Tursiops truncatus ponticus Barabash, 1940) at the Karadag Reserve, Southeastern Crimea","authors":"I. V. Logominova, A. V. Agafonov, V. A. Litvin","doi":"10.1134/s0001437023060097","DOIUrl":"https://doi.org/10.1134/s0001437023060097","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The article studies the bottlenose dolphin community in coastal waters of the Karadag Reserve (southeastern Crimea). Observations and acoustic recordings were carried out in 2015–2017 and 2020–2022. To identify bottlenose dolphins, we mainly used the method developed by us for acoustic recording of bottlenose dolphins by individual sound signals: signature whistles. This identification method makes it possible to fairly accurately count the population, observe the movements of bottlenose dolphins, and reveal the relationships between individuals.</p>","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":"38 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139398486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号