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41.
Подробнее
И 37
Измятинский, Д.В.
Состав и количество рыб в элиторали российских вод Японского моря в тёплое и холодное время года = Composition and abundance of fish species in the outer sublittoral zone of the Japan Sea within Russian EEZ in warm and cold seasons / Измятинский, Д.В., Калчугин, П.В. // Известия ТИНРО. - Владивосток: Изд-во ТИНРО, 2010. Том 161, С. 79-91./Izv. TINRO. - Vladivostok: TINRO Publishing, 2010. Vol. 161, P. 79-91. - 2010
~РУБ Article
Рубрики: Trawl
Fish
Biomass
Temperature
Distribution
Depths
Аннотация: С ноября по апрель по сравнению с тёплым периодом года количество видов рыб в траловых уловах уменьшается примерно в 3 раза: 85 и 272 вида. Однако в зимние месяцы в элиторали было отмечено 4 вида, отсутствующих здесь летом. У большинства видов рыб биомасса на единицу площади в элиторали в холодное время года ниже, чем в тёплое, что в первую очередь связано со смещением рыб на свал глубин при похолодании. Но есть виды, у которых биомассы в элиторали в холодное время года увеличиваются./Fish population in the bottom and near-bottom layers is investigated for the depth range 50-200 m on the data of 88 trawl surveys, conducted completely of partially in Russia EEZ of the Japan Sea (in total, 3615 trawls including 2104 in May-October and 1511 in November-April). On average, species composition in the catches obtained in November-April is three times poorer than in May-October: 85 against 272 species.
Доп.точки доступа:
Калчугин, П.В.
И 37
Измятинский, Д.В.
Состав и количество рыб в элиторали российских вод Японского моря в тёплое и холодное время года = Composition and abundance of fish species in the outer sublittoral zone of the Japan Sea within Russian EEZ in warm and cold seasons / Измятинский, Д.В., Калчугин, П.В. // Известия ТИНРО. - Владивосток: Изд-во ТИНРО, 2010. Том 161, С. 79-91./Izv. TINRO. - Vladivostok: TINRO Publishing, 2010. Vol. 161, P. 79-91. - 2010
Рубрики: Trawl
Fish
Biomass
Temperature
Distribution
Depths
Аннотация: С ноября по апрель по сравнению с тёплым периодом года количество видов рыб в траловых уловах уменьшается примерно в 3 раза: 85 и 272 вида. Однако в зимние месяцы в элиторали было отмечено 4 вида, отсутствующих здесь летом. У большинства видов рыб биомасса на единицу площади в элиторали в холодное время года ниже, чем в тёплое, что в первую очередь связано со смещением рыб на свал глубин при похолодании. Но есть виды, у которых биомассы в элиторали в холодное время года увеличиваются./Fish population in the bottom and near-bottom layers is investigated for the depth range 50-200 m on the data of 88 trawl surveys, conducted completely of partially in Russia EEZ of the Japan Sea (in total, 3615 trawls including 2104 in May-October and 1511 in November-April). On average, species composition in the catches obtained in November-April is three times poorer than in May-October: 85 against 272 species.
Доп.точки доступа:
Калчугин, П.В.
42.
Подробнее
М 69
Михеев, П.Б.
Численность и биомасса хариуса Thymallus tugarinae в бассейне Нижнего Амура = Number and biomass of the grayling Thymallus tugarinae from the low Amur basin / Михеев, П.Б. // Известия ТИНРО. - Владивосток: Изд-во ТИНРО, 2010. Том 161, С. 101-119./Izv. TINRO. - Vladivostok: TINRO Publishing, 2010. Vol. 161, P. 101-119. - 2010
~РУБ Article
Рубрики: Grayling
Biomass
Amur basin
Stocks
Density
Distribution
Аннотация: Приводятся результаты оценки численности и биомассы нижнеамурского хариуса - популярного объекта спортивного и любительского рыболовства в бассейне Нижнего Амура. Оценку проводили в среднем течении 9 модельных рек в период нагула вида. Использовали метод площадей. Реки различной протяжённости различаются по численности и биомассе хариусов в среднем течении. Максимальные значения отмечены в малых водотоках (длиной до 20 км)./The grayling Thymallus tugarinae is a popular object for sport fishing in the Amur. Its number and biomass in the feeding period is estimated using the technique of CPUE extrapolation. The grayling lives in three biotopes: rift, pool, and reach. CPUE for each of them is estimated from catches of casting net (mesh size 5 mm, opening area 3 m2) in middle streams of nine rivers with different length, drainage, slope, etc. All rivers are divided to three types: small (length 50 km), medium (50-200km), and large (lenght 200 km).
М 69
Михеев, П.Б.
Численность и биомасса хариуса Thymallus tugarinae в бассейне Нижнего Амура = Number and biomass of the grayling Thymallus tugarinae from the low Amur basin / Михеев, П.Б. // Известия ТИНРО. - Владивосток: Изд-во ТИНРО, 2010. Том 161, С. 101-119./Izv. TINRO. - Vladivostok: TINRO Publishing, 2010. Vol. 161, P. 101-119. - 2010
Рубрики: Grayling
Biomass
Amur basin
Stocks
Density
Distribution
Аннотация: Приводятся результаты оценки численности и биомассы нижнеамурского хариуса - популярного объекта спортивного и любительского рыболовства в бассейне Нижнего Амура. Оценку проводили в среднем течении 9 модельных рек в период нагула вида. Использовали метод площадей. Реки различной протяжённости различаются по численности и биомассе хариусов в среднем течении. Максимальные значения отмечены в малых водотоках (длиной до 20 км)./The grayling Thymallus tugarinae is a popular object for sport fishing in the Amur. Its number and biomass in the feeding period is estimated using the technique of CPUE extrapolation. The grayling lives in three biotopes: rift, pool, and reach. CPUE for each of them is estimated from catches of casting net (mesh size 5 mm, opening area 3 m2) in middle streams of nine rivers with different length, drainage, slope, etc. All rivers are divided to three types: small (length 50 km), medium (50-200km), and large (lenght 200 km).
43.
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П 35
Питание тихоокеанских лососей в зоне субарктического фронта в зимне-весенний период 2009 г. = Feeding of pacific salmon in the Subarctic Front zone in winter and spring / Найденко, С.В.Старовойтов, А.Н.Куренкова, Е.В, [и др.] // Известия ТИНРО. - Владивосток: Изд-во ТИНРО, 2010. Том 161, С. 142-161./Izv. TINRO. - Vladivostok: TINRO Publishing, 2010. Vol. 161, P. 142-161. - 2010
~РУБ Article
Рубрики: Salmons
Feeding
Ration
Plankton
Physiology
Distribution
Аннотация: Приведены результаты исследований состава и величины рационов тихоокеанских лососей в центральной и западной частях зоны Субарктического фронта в феврале-апреле 2009 г. Отмечено, что в зимне-весенний период тихоокеанские лососи продолжают интенсивно питаться. Максимальные индексы наполнения желудков, в некоторых случаях до 600%, отмечены у горбуши. Избирательность лососей по отношению к таким кормовым объектам, как эвфаузииды, гиперииды и птероподы, и интенсивное питание свидетельствуют о достаточном обилии корма в районах зимнего нагула рыб./Food structure and diet of pacific salmons are investigated in the central and western parts of the Subarctic Front in February-April, 2009. The salmons fed actively, in particular the large-sized fish. Pink salmon had the maximum indices of stomach fullness, sometimes up to 600%. The salmons preferred euphausiids, hyperiids, and pteropods. High selectivity of salmons feeding and its high intensity indicate high abundance of forage organisms in their winter feeding grounds.
Доп.точки доступа:
Найденко, С.В.
Старовойтов, А.Н.
Куренкова, Е.В,
Чучукало, В.И.
Овсянников, Р.Г.
П 35
Питание тихоокеанских лососей в зоне субарктического фронта в зимне-весенний период 2009 г. = Feeding of pacific salmon in the Subarctic Front zone in winter and spring / Найденко, С.В.Старовойтов, А.Н.Куренкова, Е.В, [и др.] // Известия ТИНРО. - Владивосток: Изд-во ТИНРО, 2010. Том 161, С. 142-161./Izv. TINRO. - Vladivostok: TINRO Publishing, 2010. Vol. 161, P. 142-161. - 2010
Рубрики: Salmons
Feeding
Ration
Plankton
Physiology
Distribution
Аннотация: Приведены результаты исследований состава и величины рационов тихоокеанских лососей в центральной и западной частях зоны Субарктического фронта в феврале-апреле 2009 г. Отмечено, что в зимне-весенний период тихоокеанские лососи продолжают интенсивно питаться. Максимальные индексы наполнения желудков, в некоторых случаях до 600%, отмечены у горбуши. Избирательность лососей по отношению к таким кормовым объектам, как эвфаузииды, гиперииды и птероподы, и интенсивное питание свидетельствуют о достаточном обилии корма в районах зимнего нагула рыб./Food structure and diet of pacific salmons are investigated in the central and western parts of the Subarctic Front in February-April, 2009. The salmons fed actively, in particular the large-sized fish. Pink salmon had the maximum indices of stomach fullness, sometimes up to 600%. The salmons preferred euphausiids, hyperiids, and pteropods. High selectivity of salmons feeding and its high intensity indicate high abundance of forage organisms in their winter feeding grounds.
Доп.точки доступа:
Найденко, С.В.
Старовойтов, А.Н.
Куренкова, Е.В,
Чучукало, В.И.
Овсянников, Р.Г.
44.
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М 87
Мощенко, А.В.
Экологическое состояние восточной части пролива Босфор Восточный (залив Петра Великого Японского моря) = Ecological state of the eastern part of the Bosphor Vostochny Strait (Peter the Great Bay, Japan Sea) / Мощенко, А.В., Шайхлисламова, Л.Е. // Известия ТИНРО. - Владивосток: Изд-во ТИНРО, 2010. Том 161, С. 199-211./Izv. TINRO. - Vladivostok: TINRO Publishing, 2010. Vol. 161, P. 199-211. - 2010
~РУБ Article
Рубрики: Ecology
Bosphor Vostochny Strait
Phenols
Ions
Distribution
Pollutions
Аннотация: Изучено содержание и распределение углеводородов, фенолов, меди, свинца и дихлордифенилтрихлорметилметана (рр'-ДДТ и его метаболитов рр'-ДДД и рр'-ДДЕ) в грунтах некоторых акваторий восточной части прол. Босфор Восточный. Делается вывод об умеренной степени загрязнения и заметной пространственной неоднородности его поля в районе работ. В биологическом отношении загрязнение варьирует от уровня, при котором изменения в сообществах макрозообентоса не наблюдается, до такого, при котором происходит их полная деградация./Distribution of petroleum hydrocarbons, phenols, ions of cooper and lead, and dichlordipheniltrichlormethane (pp'-DDT and its metabolites pp'-DDD and pp'-DDE) in sediments of the eastern part of the Bosphor Vostochny Strait is studied. The pollutants have significant spatial variability. Generally, pollution is estimated as moderate, but its impact on macroozoobenthos varies from zero influence to the total degradation of macrozoobenthic communities.
Доп.точки доступа:
Шайхлисламова, Л.Е.
М 87
Мощенко, А.В.
Экологическое состояние восточной части пролива Босфор Восточный (залив Петра Великого Японского моря) = Ecological state of the eastern part of the Bosphor Vostochny Strait (Peter the Great Bay, Japan Sea) / Мощенко, А.В., Шайхлисламова, Л.Е. // Известия ТИНРО. - Владивосток: Изд-во ТИНРО, 2010. Том 161, С. 199-211./Izv. TINRO. - Vladivostok: TINRO Publishing, 2010. Vol. 161, P. 199-211. - 2010
Рубрики: Ecology
Bosphor Vostochny Strait
Phenols
Ions
Distribution
Pollutions
Аннотация: Изучено содержание и распределение углеводородов, фенолов, меди, свинца и дихлордифенилтрихлорметилметана (рр'-ДДТ и его метаболитов рр'-ДДД и рр'-ДДЕ) в грунтах некоторых акваторий восточной части прол. Босфор Восточный. Делается вывод об умеренной степени загрязнения и заметной пространственной неоднородности его поля в районе работ. В биологическом отношении загрязнение варьирует от уровня, при котором изменения в сообществах макрозообентоса не наблюдается, до такого, при котором происходит их полная деградация./Distribution of petroleum hydrocarbons, phenols, ions of cooper and lead, and dichlordipheniltrichlormethane (pp'-DDT and its metabolites pp'-DDD and pp'-DDE) in sediments of the eastern part of the Bosphor Vostochny Strait is studied. The pollutants have significant spatial variability. Generally, pollution is estimated as moderate, but its impact on macroozoobenthos varies from zero influence to the total degradation of macrozoobenthic communities.
Доп.точки доступа:
Шайхлисламова, Л.Е.
45.
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S19
Samyshev, E.Z.
Antarctic krill and the structure of planktonic community in its distribution area / Samyshev, E.Z. - [Б. м.] : "Nauka" Publishing, 1991. - Б. ц.
~РУБ Book
Рубрики: Krill
Antarctic
Plankton
Distribution
Аннотация: Data of long-term field and experimental studies conducted at a typical region of Antarctic underlie the analysis of major structural and functional characteristics of the Antarctic krill Euphausia superba Dana prevailing in Antarctic ecosystem and other planktonic community members in the area. A solid theoretical basis has been formed that allows to have and insight into economic prospects for the krill. For hydrobiologists, ecologists.
S19
Samyshev, E.Z.
Antarctic krill and the structure of planktonic community in its distribution area / Samyshev, E.Z. - [Б. м.] : "Nauka" Publishing, 1991. - Б. ц.
Рубрики: Krill
Antarctic
Plankton
Distribution
Аннотация: Data of long-term field and experimental studies conducted at a typical region of Antarctic underlie the analysis of major structural and functional characteristics of the Antarctic krill Euphausia superba Dana prevailing in Antarctic ecosystem and other planktonic community members in the area. A solid theoretical basis has been formed that allows to have and insight into economic prospects for the krill. For hydrobiologists, ecologists.
46.
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P43
Pereladov, M.V.
Modern status and biological aspects of Veined Rapa Whelk (Rapana venosa) in the North-East Black Sea / Pereladov, M.V. // Black Sea. Current state of the ecosystem and ways to increase the fishing value: VNIRO proceedings. - M.: VNIRO Publishing, 2013. - V. 150. - P. 8-20. - 2013
~РУБ Article
Рубрики: Population
Stocks
Distribution
Rapana venosa
Biology
Black Sea
Аннотация: Veined rapa whelk (Rapana venosa) was first recorded in the Black Sea in 1947 near Novorossiysk and by the 1970s it spread along the whole Black Sea coasts. In this time interval the rapa whelk population was stabilized in number and during the 1980s its annual fluctuations depended only from climate changes. In recent years we have observed a decrease in rapa whelk size, its earlier spawning and larval settling on submerged substrate and flattening of regional morphological changes. Based on the data analysis for 1970-2010, we offered the hypothesis that the changes in the rapa whelk biology had occurred owing to the change of the lecithotrophic larval development pattern from the years of abundant food supply to the planktotrophic one in the years with low feeding benthos mass.
P43
Pereladov, M.V.
Modern status and biological aspects of Veined Rapa Whelk (Rapana venosa) in the North-East Black Sea / Pereladov, M.V. // Black Sea. Current state of the ecosystem and ways to increase the fishing value: VNIRO proceedings. - M.: VNIRO Publishing, 2013. - V. 150. - P. 8-20. - 2013
Рубрики: Population
Stocks
Distribution
Rapana venosa
Biology
Black Sea
Аннотация: Veined rapa whelk (Rapana venosa) was first recorded in the Black Sea in 1947 near Novorossiysk and by the 1970s it spread along the whole Black Sea coasts. In this time interval the rapa whelk population was stabilized in number and during the 1980s its annual fluctuations depended only from climate changes. In recent years we have observed a decrease in rapa whelk size, its earlier spawning and larval settling on submerged substrate and flattening of regional morphological changes. Based on the data analysis for 1970-2010, we offered the hypothesis that the changes in the rapa whelk biology had occurred owing to the change of the lecithotrophic larval development pattern from the years of abundant food supply to the planktotrophic one in the years with low feeding benthos mass.
47.
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M19
Main Factors in Formation of Planctonic Communities Structure in the Northern Barents Sea under Warming Period in Arctic / Orlova, E.L.Boitsov, V.D.Ivshin, V.A. [и др.] // Modern methods for assessing the biological productivity of waters in industrial areas of the World ocean: VNIRO proceedings. - M.: VNIRO Publishing, 2014. - V. 152. - P. 169-189. - 2014
~РУБ Article
Рубрики: Arctic
Copepods
Distribution
Abundance
Reproduction
Barents Sea
Аннотация: Species composition, distribution reproduction, age composition and biomass of copepods in the northern Barents Sea in 2008-2011 under warming of Arctic are considered in the paper. Main factors which impact on main characteristics of zooplaktton communities are revealed. Dynamics of abundance of Calanus finmarchicus mainly determined by intensity of warm water flux to the Barents Sea, while for rate of ice melting and predation on older individuals and females by pelagic fishes were the most important for C.lgacialis.
Доп.точки доступа:
Orlova, E.L.
Boitsov, V.D.
Ivshin, V.A.
Dolgov, A.V.
Nesterova, V.N.
M19
Main Factors in Formation of Planctonic Communities Structure in the Northern Barents Sea under Warming Period in Arctic / Orlova, E.L.Boitsov, V.D.Ivshin, V.A. [и др.] // Modern methods for assessing the biological productivity of waters in industrial areas of the World ocean: VNIRO proceedings. - M.: VNIRO Publishing, 2014. - V. 152. - P. 169-189. - 2014
Рубрики: Arctic
Copepods
Distribution
Abundance
Reproduction
Barents Sea
Аннотация: Species composition, distribution reproduction, age composition and biomass of copepods in the northern Barents Sea in 2008-2011 under warming of Arctic are considered in the paper. Main factors which impact on main characteristics of zooplaktton communities are revealed. Dynamics of abundance of Calanus finmarchicus mainly determined by intensity of warm water flux to the Barents Sea, while for rate of ice melting and predation on older individuals and females by pelagic fishes were the most important for C.lgacialis.
Доп.точки доступа:
Orlova, E.L.
Boitsov, V.D.
Ivshin, V.A.
Dolgov, A.V.
Nesterova, V.N.
48.
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S70
Sologub, D.
Distribution and Age Structure of Euphausiids Larvae at the Western Antarctic Peninsula (Subarea 48.1) / Sologub, D. // Commercial species and their biology: VNIRO proceedings. - M.: VNIRO Publishing, 2015. - V. 154. - P. 3-15. - 2015
~РУБ Article
Рубрики: Krill
Distribution
Stocks
Antarctic
Climate
Ecosystems
Аннотация: Euphausiids (Euphausiacea) are the key species in the trophic structure of ecosystems of the Southern Ocean. The data on the distribution and age structure of Euphausiids larvae were collected during R/V "Polarstern" expedition in January 2011 in the West Antarctic Peninsula region. Three types of distribution were found out among the four Euphausiids species: offshore (T. macrura and E. frigida), inshore (E. crystallorophias) and distribution at the shelf slope (E. superba). The densities of E. superba larvae in 2011 were higher than the results of previous studies in the 70's and 80's. This indicates a high recruitment rates in spite of rapid climatic changes in the Antarctic Peninsula region.
S70
Sologub, D.
Distribution and Age Structure of Euphausiids Larvae at the Western Antarctic Peninsula (Subarea 48.1) / Sologub, D. // Commercial species and their biology: VNIRO proceedings. - M.: VNIRO Publishing, 2015. - V. 154. - P. 3-15. - 2015
Рубрики: Krill
Distribution
Stocks
Antarctic
Climate
Ecosystems
Аннотация: Euphausiids (Euphausiacea) are the key species in the trophic structure of ecosystems of the Southern Ocean. The data on the distribution and age structure of Euphausiids larvae were collected during R/V "Polarstern" expedition in January 2011 in the West Antarctic Peninsula region. Three types of distribution were found out among the four Euphausiids species: offshore (T. macrura and E. frigida), inshore (E. crystallorophias) and distribution at the shelf slope (E. superba). The densities of E. superba larvae in 2011 were higher than the results of previous studies in the 70's and 80's. This indicates a high recruitment rates in spite of rapid climatic changes in the Antarctic Peninsula region.
49.
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O-75
Orlov, A.M.
Comparative Analysis of Distribution of Two Anadromous Parasitic Lampreys in the North Pacific / Orlov, A.M., Baitalyuk, A.A. // Commercial species and their biology: VNIRO proceedings. - M.: VNIRO Publishing, 2015. - V. 154. - P. 39-56. - 2015
~РУБ Article
Рубрики: Lamprey
Distribution
Species
Parasites
North Pacific
The Bering Sea
Аннотация: Features of spatial and vertical distributions of two species of anadromous parasitic lampreys, Arctic lamprey Lethenteron camtschaticum and Pacific lamprey Enthosphenus tridentatus, in the North Pacific Ocean are considered in a comparative perspective. It is shown that the first species is most abundant in the northwestern Pacific (Sea of Japan and Sea of Okhotsk), while second species - in the northeastern Pacific (west coast of USA and Canada). Both species reach high abundance in the Bering Sea, however prefer different biotopes. Arctic lamprey inhabits mostly upper 100-m layer, while Pacific lamprey occupies water column with depths less than 200 m and near-bottom layers shallower 500 m. Based on the features of spatial and vertical distributions, it might be assumed that the hosts of the former species are mainly Pacific salmons Oncrorhynchus spp., while those of the latter species - various demersal fishes such as walleye pollock Theragra chalcogramma, Pacific cod Gadus macrocephalus, Greenland halibut Reinhardtius hippoglossoides, etc.
Доп.точки доступа:
Baitalyuk, A.A.
O-75
Orlov, A.M.
Comparative Analysis of Distribution of Two Anadromous Parasitic Lampreys in the North Pacific / Orlov, A.M., Baitalyuk, A.A. // Commercial species and their biology: VNIRO proceedings. - M.: VNIRO Publishing, 2015. - V. 154. - P. 39-56. - 2015
Рубрики: Lamprey
Distribution
Species
Parasites
North Pacific
The Bering Sea
Аннотация: Features of spatial and vertical distributions of two species of anadromous parasitic lampreys, Arctic lamprey Lethenteron camtschaticum and Pacific lamprey Enthosphenus tridentatus, in the North Pacific Ocean are considered in a comparative perspective. It is shown that the first species is most abundant in the northwestern Pacific (Sea of Japan and Sea of Okhotsk), while second species - in the northeastern Pacific (west coast of USA and Canada). Both species reach high abundance in the Bering Sea, however prefer different biotopes. Arctic lamprey inhabits mostly upper 100-m layer, while Pacific lamprey occupies water column with depths less than 200 m and near-bottom layers shallower 500 m. Based on the features of spatial and vertical distributions, it might be assumed that the hosts of the former species are mainly Pacific salmons Oncrorhynchus spp., while those of the latter species - various demersal fishes such as walleye pollock Theragra chalcogramma, Pacific cod Gadus macrocephalus, Greenland halibut Reinhardtius hippoglossoides, etc.
Доп.точки доступа:
Baitalyuk, A.A.
50.
Подробнее
S70
Sologub, D.
Hydroacoustic Observation of Antarctic Krill (Euphausia superba) in Atlantic Sector of Antarctica During 2010/11 season / Sologub, D. // Commercial species and their biology: VNIRO proceedings. - M.: VNIRO Publishing, 2015. - V. 155. - P. 3-13. - 2015
~РУБ Article
Рубрики: Hydroacoustics
Distribution
Antarctica
Antarctic krill
Circulation
Coefficient
Аннотация: Hydroacoustic observations of Antarctic krill were made during the 27th Antarctic expedition of the RV "Polarstern" in CCAMLR Subareas 48.1, 48.2, 48.5 and 48.6 including in the central part of the Weddell Sea. Hydroacoustic data were collected using two-frequency echo sounder (70 and 120 kHz) "SIMRAD EK 60". Nautical Area Scattering Coefficient (NASC) was used for characteristic of krill density. NASC was calculated from 10 to 300 m depths with EDSU 5 nm. Maximal NASC values (average 44,4+-3,1 m2/n.m2) were recorded in the Antarctic Peninsula region (Subarea 48.1). Increasing of NASC was recorded in regions corresponding to the Antarctic Circumpolar Current, the Coastal Current and the circulation around the Maud Rise. NASC values in the central part of the Weddell Sea (between 15 degrees and 45 degrees W) were extremely low, mainly less than 1 m2/n.m2. Extremely low NASC indicates the absence of krill swarms in the central part of the Weddell Sea and probably connected with large-scale circulation of the Atlantic sector of Antarctica.
S70
Sologub, D.
Hydroacoustic Observation of Antarctic Krill (Euphausia superba) in Atlantic Sector of Antarctica During 2010/11 season / Sologub, D. // Commercial species and their biology: VNIRO proceedings. - M.: VNIRO Publishing, 2015. - V. 155. - P. 3-13. - 2015
Рубрики: Hydroacoustics
Distribution
Antarctica
Antarctic krill
Circulation
Coefficient
Аннотация: Hydroacoustic observations of Antarctic krill were made during the 27th Antarctic expedition of the RV "Polarstern" in CCAMLR Subareas 48.1, 48.2, 48.5 and 48.6 including in the central part of the Weddell Sea. Hydroacoustic data were collected using two-frequency echo sounder (70 and 120 kHz) "SIMRAD EK 60". Nautical Area Scattering Coefficient (NASC) was used for characteristic of krill density. NASC was calculated from 10 to 300 m depths with EDSU 5 nm. Maximal NASC values (average 44,4+-3,1 m2/n.m2) were recorded in the Antarctic Peninsula region (Subarea 48.1). Increasing of NASC was recorded in regions corresponding to the Antarctic Circumpolar Current, the Coastal Current and the circulation around the Maud Rise. NASC values in the central part of the Weddell Sea (between 15 degrees and 45 degrees W) were extremely low, mainly less than 1 m2/n.m2. Extremely low NASC indicates the absence of krill swarms in the central part of the Weddell Sea and probably connected with large-scale circulation of the Atlantic sector of Antarctica.
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