Распределение пурпурного кальмара Sthenoteuthis oualaniensis Lesson (Cephalopoda: Ommastrephidae) в северной части Аравийского моря
A complex survey was carried out on board a scientific research vessel «Dmitry Stefanov» with application of a pelagic trawl in the upper sound-scattering layer (SSL) at the depths from 0 to 120 m in the northern Arabian Sea, in the area of 200-mile zone of foreign states to 15° N from April, 23 to May 14, 1989. This area was characterized by impoverished teutofauna (5 species), in comparison with the southern Arabian Sea and the equatorial area, where 10 and 15 cephalopod species were recorded in the catches, respectively. Sestonic biomass varied from 50 to 2520 mg/m3 and on average made up 392 mg/m3 (207 mg/m3, excluding salps). The highest values of plankton biomass were recorded in the north-western part of the studied area. The sections of water rise on the periphery of the anticyclonic vortex and in the area of divergence, where the Arabian surface water «outcropped» closer to the oceanic surface, were especially productive. In the areas of water rise, the SSL tapered down to 25-40 m and was located at the depths from 10 to 110 m, and in the areas of lowering it was located in the range of depths from 25 to 185 m. The catches of the purpleback flying squid varied from 2.5 to 130 kg per hour, its abundance was fluctuating from 11 to 1216 ind. per hour. The average catch was 24.7 kg per hour (298 ind. per hour). The biggest catches were recorded in the area between 16° and 20° N, bordering on the economic zone of Oman. At the night-light stations, the purpleback flying squid biomass varied in the range from 0 to 150 kg/km2 and on average made up 35.9 kg/km2. The most productive areas were also located in the northern part of the studied region. It could be assumed that the formation mechanism for the purpleback flying squid aggregations in the upper SSL is based on the peculiarities of its feeding behaviour; the tapering productive layer of the Arabian water mass in the areas of water rise increases the concentrations of food zooplankton and Myctophidae, which attracts squids and leads to formation of their aggregations of commercial value.
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Format: | Conference Material biblioteca |
Language: | Russian |
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Kerch Branch ("YugNIRO") of FSBSI "AzNIIRKH"
2017
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Subjects: | Sthenoteuthis oualaniensis, Purpleback flying squid, Exclusive economic zone, Catch statistics, Plankton, Biomass, Night-light station, Abundance, Food organisms, Commercial catches, |
Online Access: | http://hdl.handle.net/1834/11062 |
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Sthenoteuthis oualaniensis Purpleback flying squid Exclusive economic zone Catch statistics Plankton Biomass Night-light station Abundance Food organisms Commercial catches Sthenoteuthis oualaniensis Purpleback flying squid Exclusive economic zone Catch statistics Plankton Biomass Night-light station Abundance Food organisms Commercial catches |
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Sthenoteuthis oualaniensis Purpleback flying squid Exclusive economic zone Catch statistics Plankton Biomass Night-light station Abundance Food organisms Commercial catches Sthenoteuthis oualaniensis Purpleback flying squid Exclusive economic zone Catch statistics Plankton Biomass Night-light station Abundance Food organisms Commercial catches Korzun, Yu.V. Kriskevich, L.V. Распределение пурпурного кальмара Sthenoteuthis oualaniensis Lesson (Cephalopoda: Ommastrephidae) в северной части Аравийского моря |
description |
A complex survey was carried out on board a scientific research vessel «Dmitry Stefanov» with application of a pelagic trawl in the upper sound-scattering layer (SSL) at the depths from 0 to 120 m in the northern Arabian Sea, in the area of 200-mile zone of foreign states to 15° N from April, 23 to May 14, 1989. This area was characterized by impoverished teutofauna (5 species), in comparison with the southern Arabian Sea and the equatorial area, where 10 and 15 cephalopod species were recorded in the catches, respectively. Sestonic biomass varied from 50 to 2520 mg/m3 and on average made up 392 mg/m3 (207 mg/m3, excluding salps). The highest values of plankton biomass were recorded in the north-western part of the studied area. The sections of water rise on the periphery of the anticyclonic vortex and in the area of divergence, where the Arabian surface water «outcropped» closer to the oceanic surface, were especially productive. In the areas of water rise, the SSL tapered down to 25-40 m and was located at the depths from 10 to 110 m, and in the areas of lowering it was located in the range of depths from 25 to 185 m. The catches of the purpleback flying squid varied from 2.5 to 130 kg per hour, its abundance was fluctuating from 11 to 1216 ind. per hour. The average catch was 24.7 kg
per hour (298 ind. per hour). The biggest catches were recorded in the area between 16° and 20° N, bordering on the economic zone of Oman. At the night-light stations, the purpleback flying squid biomass varied in the range from 0 to 150 kg/km2 and on average made up 35.9 kg/km2. The most productive areas were also located in the northern part of the studied region. It could be assumed that the formation mechanism for the purpleback flying squid aggregations in the upper SSL is based on the peculiarities of its feeding behaviour; the tapering productive layer of the Arabian water mass in the areas of water rise increases the concentrations of food zooplankton and Myctophidae, which attracts squids and leads to formation of their aggregations of commercial value. |
author2 |
Kozhurin, E.A. |
author_facet |
Kozhurin, E.A. Korzun, Yu.V. Kriskevich, L.V. |
format |
Conference Material |
topic_facet |
Sthenoteuthis oualaniensis Purpleback flying squid Exclusive economic zone Catch statistics Plankton Biomass Night-light station Abundance Food organisms Commercial catches |
author |
Korzun, Yu.V. Kriskevich, L.V. |
author_sort |
Korzun, Yu.V. |
title |
Распределение пурпурного кальмара Sthenoteuthis oualaniensis Lesson (Cephalopoda: Ommastrephidae) в северной части Аравийского моря |
title_short |
Распределение пурпурного кальмара Sthenoteuthis oualaniensis Lesson (Cephalopoda: Ommastrephidae) в северной части Аравийского моря |
title_full |
Распределение пурпурного кальмара Sthenoteuthis oualaniensis Lesson (Cephalopoda: Ommastrephidae) в северной части Аравийского моря |
title_fullStr |
Распределение пурпурного кальмара Sthenoteuthis oualaniensis Lesson (Cephalopoda: Ommastrephidae) в северной части Аравийского моря |
title_full_unstemmed |
Распределение пурпурного кальмара Sthenoteuthis oualaniensis Lesson (Cephalopoda: Ommastrephidae) в северной части Аравийского моря |
title_sort |
распределение пурпурного кальмара sthenoteuthis oualaniensis lesson (cephalopoda: ommastrephidae) в северной части аравийского моря |
publisher |
Kerch Branch ("YugNIRO") of FSBSI "AzNIIRKH" |
publishDate |
2017 |
url |
http://hdl.handle.net/1834/11062 |
work_keys_str_mv |
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_version_ |
1756076846809612288 |
spelling |
dig-aquadocs-1834-110622021-05-19T06:58:51Z Распределение пурпурного кальмара Sthenoteuthis oualaniensis Lesson (Cephalopoda: Ommastrephidae) в северной части Аравийского моря Distribution of the purpleback flying squid Sthenoteuthis oualaniensis Lesson (Cephalopoda: Ommastrephidae) in the northern Arabian Sea Korzun, Yu.V. Kriskevich, L.V. Kozhurin, E.A. Sthenoteuthis oualaniensis Purpleback flying squid Exclusive economic zone Catch statistics Plankton Biomass Night-light station Abundance Food organisms Commercial catches A complex survey was carried out on board a scientific research vessel «Dmitry Stefanov» with application of a pelagic trawl in the upper sound-scattering layer (SSL) at the depths from 0 to 120 m in the northern Arabian Sea, in the area of 200-mile zone of foreign states to 15° N from April, 23 to May 14, 1989. This area was characterized by impoverished teutofauna (5 species), in comparison with the southern Arabian Sea and the equatorial area, where 10 and 15 cephalopod species were recorded in the catches, respectively. Sestonic biomass varied from 50 to 2520 mg/m3 and on average made up 392 mg/m3 (207 mg/m3, excluding salps). The highest values of plankton biomass were recorded in the north-western part of the studied area. The sections of water rise on the periphery of the anticyclonic vortex and in the area of divergence, where the Arabian surface water «outcropped» closer to the oceanic surface, were especially productive. In the areas of water rise, the SSL tapered down to 25-40 m and was located at the depths from 10 to 110 m, and in the areas of lowering it was located in the range of depths from 25 to 185 m. The catches of the purpleback flying squid varied from 2.5 to 130 kg per hour, its abundance was fluctuating from 11 to 1216 ind. per hour. The average catch was 24.7 kg per hour (298 ind. per hour). The biggest catches were recorded in the area between 16° and 20° N, bordering on the economic zone of Oman. At the night-light stations, the purpleback flying squid biomass varied in the range from 0 to 150 kg/km2 and on average made up 35.9 kg/km2. The most productive areas were also located in the northern part of the studied region. It could be assumed that the formation mechanism for the purpleback flying squid aggregations in the upper SSL is based on the peculiarities of its feeding behaviour; the tapering productive layer of the Arabian water mass in the areas of water rise increases the concentrations of food zooplankton and Myctophidae, which attracts squids and leads to formation of their aggregations of commercial value. В северной части Аравийского моря, на акватории от 200-мильных зон иностранных государств до параллели 15° с. ш., с 23 апреля по 14 мая 1989 г. на НИС «Дмитрий Стефанов» была выполнена комплексная учетная съемка пелагическим тралом в верхнем звукорассеивающем слое (ЗРС) на глубинах 0-120 м. Эта акватория характеризовалась обедненностью тевтофауны (5 видов) по сравнению с южной частью Аравийского моря и экваториальным районом, где в уловах отмечалось 10 и 15 видов океанических головоногих моллюсков, соответственно. Биомасса сестона колебалась от 50 до 2520 мг/м3 и в среднем составляла 392 мг/м3 (207 мг/м3 без учета сальп). Наибольшие значения биомассы планктона отмечались в северо-западной части исследованного района. Особенно продуктивными являлись участки подъема вод на периферии антициклонического круговорота и в дивергентной зоне, где аравийская поверхностная вода «выклинивалась» ближе к поверхности океана. В районах подъема вод ЗРС сужался до 25-40 м и располагался на глубинах 10-110 м, а в районах опускания локализовался в интервале глубин 25-185 м. Уловы пурпурного кальмара колебались от 2,5 до 130 кг/час, его численность варьировала в пределах от 11 до 1216 экз./час. Средний улов составил 24,7 кг/час (298 экз./час). Наибольшие уловы отмечались на участке между 16 и 20° с. ш., на границе с экономзоной Омана. На световых станциях биомасса пурпурного кальмара варьировала от 0 до 150 кг/км2 и в среднем составляла 35,9 кг/км2. Наиболее продуктивные участки располагались также в северной части исследованного района. Можно предположить, что механизм образования скоплений крупного пурпурного аравийского кальмара в верхнем ЗРС основан на особенностях его кормового поведения и состоит в том, что сужающийся продуктивный слой аравийской водной массы в районах подъема вод повышает концентрации кормового зоопланктона и миктофид, что привлекает кальмаров и в результате чего образуются их промысловые скопления. Published 2018-02-01T11:59:22Z 2018-02-01T11:59:22Z 2017 Conference Material Non Refereed УДК 639.2/.3+574.5(262.5+262.54) http://hdl.handle.net/1834/11062 ru pp.183-188 Arabian Sea Kerch Branch ("YugNIRO") of FSBSI "AzNIIRKH" Kerch, Crimea |