Pub Date : 2023-06-30DOI: 10.34078/1814-0998-2023-2-107-116
A. Lebedintsev
The article provides information on a burial in a niche under a stone at Cape Bratyev in Babushkin Bay studied by S. P. Yefimov in 1976. The work yielded anthropological materials and related archaeological finds. The chance to conduct a whole genome analysis of bone remains from this burial stimulated their further study as well as the need to inspect the sites and burial grounds of the specified area. Interesting and significant data on anthropology and genetics were obtained. The individuals from the burial were found to belong to the present-day Koryaks' ancestry. It is also noted that, in the past, the inhabitants of this coast had some population contacts with the ancient residents of the southern Sea of Okhotsk shores. Brief information on the survey of Babushkin Bay archaeological sites is presented, as well.
{"title":"Исследование древнекорякского погребения С. П. Ефимовым на мысе Братьев в 1976 году (залив Бабушкина, Северное Приохотье)","authors":"A. Lebedintsev","doi":"10.34078/1814-0998-2023-2-107-116","DOIUrl":"https://doi.org/10.34078/1814-0998-2023-2-107-116","url":null,"abstract":"The article provides information on a burial in a niche under a stone at Cape Bratyev in Babushkin Bay studied by S. P. Yefimov in 1976. The work yielded anthropological materials and related archaeological finds. The chance to conduct a whole genome analysis of bone remains from this burial stimulated their further study as well as the need to inspect the sites and burial grounds of the specified area. Interesting and significant data on anthropology and genetics were obtained. The individuals from the burial were found to belong to the present-day Koryaks' ancestry. It is also noted that, in the past, the inhabitants of this coast had some population contacts with the ancient residents of the southern Sea of Okhotsk shores. Brief information on the survey of Babushkin Bay archaeological sites is presented, as well.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115456354","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}
Pub Date : 2023-06-30DOI: 10.34078/1814-0998-2023-2-52-64
V. E. Glotov
In the Upper Kolyma basin, mostly hydrocarbonate and sulfate waters are distributed with a predominance of alkaline earth metal cations in the composition. Hydro-carbonates with alkali metal cations (Na+ + K+), distinguished as soda, are found only in local areas in fault zones and those of granite intrusion contacts. They are the least mineralized (no more than 100 mg/dm3) in the seasonally thawed layer and river valley taliks, but even there, in separate foci at the elevation of above 1600 m, soda water springs with the mineralization exceeding 200 mg/dm3 occur. Soda waters in Cretaceous coal-bearing deposits within intermountain artesian basins are the most mineralized (up to 3000 mg/dm3). The association of these waters with deep fault zone has been assumingly traced. The sharp increase of the dissolved carbon dioxide and the carbonic acid anions in waters at local river valley sites is offered as the indicator of the current ingress of carbon dioxide into underground waters. Soda waters with mineralization exceeding 600 mg/dm3 , contained in some samples, are referred to balneal. Hydrogeochemical methods are proposed for further study of the role of deep faults in soda waters formation as well as for the possible use of them for curing and preventing diseases.
{"title":"Распространение и формирование подземных содовых вод на водосборной площади Верхней Колымы","authors":"V. E. Glotov","doi":"10.34078/1814-0998-2023-2-52-64","DOIUrl":"https://doi.org/10.34078/1814-0998-2023-2-52-64","url":null,"abstract":"In the Upper Kolyma basin, mostly hydrocarbonate and sulfate waters are distributed with a predominance of alkaline earth metal cations in the composition. Hydro-carbonates with alkali metal cations (Na+ + K+), distinguished as soda, are found only in local areas in fault zones and those of granite intrusion contacts. They are the least mineralized (no more than 100 mg/dm3) in the seasonally thawed layer and river valley taliks, but even there, in separate foci at the elevation of above 1600 m, soda water springs with the mineralization exceeding 200 mg/dm3 occur. Soda waters in Cretaceous coal-bearing deposits within intermountain artesian basins are the most mineralized (up to 3000 mg/dm3). The association of these waters with deep fault zone has been assumingly traced. The sharp increase of the dissolved carbon dioxide and the carbonic acid anions in waters at local river valley sites is offered as the indicator of the current ingress of carbon dioxide into underground waters. Soda waters with mineralization exceeding 600 mg/dm3 , contained in some samples, are referred to balneal. Hydrogeochemical methods are proposed for further study of the role of deep faults in soda waters formation as well as for the possible use of them for curing and preventing diseases.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"103 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127459731","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}
Pub Date : 2023-06-30DOI: 10.34078/1814-0998-2023-2-11-20
I. M. Khasanov, L. Muravyev, A. V. Tkachev, D. V. Makarova
In this paper, the results of the analysis of geophysical fields and their transformants (statistical, filtration) of gold mineralization areas are presented and some of their features are established. A set of geophysical studies and methodological processing techniques that can solve the problems of forecasting gold mineralization are presented. Based on the interpretation of a set of geophysical data and available geological materials, prospecting geological and geophysical signs of raremetal low-sulfide gold-quartz mineralization in the hierarchical sequence ore field - ore zone are offered.
{"title":"Трансформации геофизических полей и геолого-геофизические признаки золото-кварцевого оруденения на примере Средне-Урканской перспективной площади (Амурская область)","authors":"I. M. Khasanov, L. Muravyev, A. V. Tkachev, D. V. Makarova","doi":"10.34078/1814-0998-2023-2-11-20","DOIUrl":"https://doi.org/10.34078/1814-0998-2023-2-11-20","url":null,"abstract":"In this paper, the results of the analysis of geophysical fields and their transformants (statistical, filtration) of gold mineralization areas are presented and some of their features are established. A set of geophysical studies and methodological processing techniques that can solve the problems of forecasting gold mineralization are presented. Based on the interpretation of a set of geophysical data and available geological materials, prospecting geological and geophysical signs of raremetal low-sulfide gold-quartz mineralization in the hierarchical sequence ore field - ore zone are offered.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115543790","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}
Pub Date : 2023-06-30DOI: 10.34078/1814-0998-2023-2-3-10
V. Stepanov, A. V. Melnikov
The article presents the geotectonic and metallogenic position of the Amur gold-bearing province in the Kharga gold placer centre, in which there are eight ore-placer nodes (RRU) - Unya-Bomsky, Dugdinsky, Malomyrsky, Verkhnestoybinsky, Tokursky, Kharginsky, Sofiysky, and Kerbinsky. The main placers, which yielded about 25 % of the province's placer gold, and the sources of their formation are described. Placer gold production has been analyzed for almost a century and a half. Conclusions are made on the immediate prospects of the Kharga center for the placer and ore gold extraction.
{"title":"Харгинский золотороссыпной центр Приамурской золотоносной провинции","authors":"V. Stepanov, A. V. Melnikov","doi":"10.34078/1814-0998-2023-2-3-10","DOIUrl":"https://doi.org/10.34078/1814-0998-2023-2-3-10","url":null,"abstract":"The article presents the geotectonic and metallogenic position of the Amur gold-bearing province in the Kharga gold placer centre, in which there are eight ore-placer nodes (RRU) - Unya-Bomsky, Dugdinsky, Malomyrsky, Verkhnestoybinsky, Tokursky, Kharginsky, Sofiysky, and Kerbinsky. The main placers, which yielded about 25 % of the province's placer gold, and the sources of their formation are described. Placer gold production has been analyzed for almost a century and a half. Conclusions are made on the immediate prospects of the Kharga center for the placer and ore gold extraction.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"62 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124725765","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}
Pub Date : 2023-06-30DOI: 10.34078/1814-0998-2023-2-117-123
A. S. Navasardov
Using the criteria identified by the Russian historian Ya. E. Vodarsky, which permit to formulate the basic principles for determining the time and place of founding cities and settlements in general, the author certifies historical documents and facts related to determining the time and place of founding the city of Magadan and the settlements that had existed in its area.
{"title":"К дискуссии по проблеме летоисчисления города Магадана","authors":"A. S. Navasardov","doi":"10.34078/1814-0998-2023-2-117-123","DOIUrl":"https://doi.org/10.34078/1814-0998-2023-2-117-123","url":null,"abstract":"Using the criteria identified by the Russian historian Ya. E. Vodarsky, which permit to formulate the basic principles for determining the time and place of founding cities and settlements in general, the author certifies historical documents and facts related to determining the time and place of founding the city of Magadan and the settlements that had existed in its area.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125118831","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}
Pub Date : 2023-06-30DOI: 10.34078/1814-0998-2023-2-65-75
A. K. Ezhkin
The paper presents data on 18 lichen species registered on Shikotan Island for the first time, including Bryobilimbia hypnorum, Heterodermia incana, Physconia hokkaidensis, new for the Kuril Isles, and Chaenotheca ferruginea, P. propaguliferum, new for Sakhalin Oblast. Seven species (Anzia opuntiella, Coccocarpia erythroxyli, Collema japonicum, Heterodermia incana, Megalospora atrorubricans subsp. sendaiensis, Polyblastidium japonicum, and P. propaguliferum) are rare; one (Coccocarpia erythroxyli) has a conservation status in the Red Books of Sakhalin Oblast and of the Russian Federation. Brief information on distribution, ecology, essences, and contents of secondary metabolites as well as locations and photos are presented for the species.
{"title":"Дополнение к флоре лишайников острова Шикотан (Южные Курилы)","authors":"A. K. Ezhkin","doi":"10.34078/1814-0998-2023-2-65-75","DOIUrl":"https://doi.org/10.34078/1814-0998-2023-2-65-75","url":null,"abstract":"The paper presents data on 18 lichen species registered on Shikotan Island for the first time, including Bryobilimbia hypnorum, Heterodermia incana, Physconia hokkaidensis, new for the Kuril Isles, and Chaenotheca ferruginea, P. propaguliferum, new for Sakhalin Oblast. Seven species (Anzia opuntiella, Coccocarpia erythroxyli, Collema japonicum, Heterodermia incana, Megalospora atrorubricans subsp. sendaiensis, Polyblastidium japonicum, and P. propaguliferum) are rare; one (Coccocarpia erythroxyli) has a conservation status in the Red Books of Sakhalin Oblast and of the Russian Federation. Brief information on distribution, ecology, essences, and contents of secondary metabolites as well as locations and photos are presented for the species.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127774359","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}
Pub Date : 2023-06-30DOI: 10.34078/1814-0998-2023-2-21-41
P. S. Minyuk, D. K. Pozhidaeva, O. T. Sotskaya, S. S. Burnatny
The results of a comprehensive study of Lake Chistoye basin sediments are presented. Magnetic and mineralogical characteristics of various granulometric fractions of deluvial deposits, modern surface bottom sediments, and core materials have been studied. The relationship between the petromagnetic parameters of deluvium and lake sediments is shown. The composition of magnetic minerals has been determined. The dependence of magnetic characteristics on the granulometric composition of sediments has been established. Scalar magnetic parameters in core sediments show wide-amplitude variations reflecting frequent changes in sedimentation conditions. Sediments with high values of MS, Js, Jrs might have been formed in the periods of cold climate, with intensive flow of detritus material into the basin.
{"title":"Петромагнитные данные изменения природной среды голоцена в бассейне озера Чистое (Северное Приохотье)","authors":"P. S. Minyuk, D. K. Pozhidaeva, O. T. Sotskaya, S. S. Burnatny","doi":"10.34078/1814-0998-2023-2-21-41","DOIUrl":"https://doi.org/10.34078/1814-0998-2023-2-21-41","url":null,"abstract":"The results of a comprehensive study of Lake Chistoye basin sediments are presented. Magnetic and mineralogical characteristics of various granulometric fractions of deluvial deposits, modern surface bottom sediments, and core materials have been studied. The relationship between the petromagnetic parameters of deluvium and lake sediments is shown. The composition of magnetic minerals has been determined. The dependence of magnetic characteristics on the granulometric composition of sediments has been established. Scalar magnetic parameters in core sediments show wide-amplitude variations reflecting frequent changes in sedimentation conditions. Sediments with high values of MS, Js, Jrs might have been formed in the periods of cold climate, with intensive flow of detritus material into the basin.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126312125","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}
Pub Date : 2023-06-30DOI: 10.34078/1814-0998-2023-2-42-51
A. Lozhkin, A. A. Andreev, P. Anderson, Yu. A. Korzun, E. Y. Nedorubova
The response of vegetation to climate change in Polar Chukotka between 2.510 and 2.554 Ma was determined by a palynological study of sediment cores from Lake Elgygytgyn recovered during the international expedition "El'gygytgyn Drilling Project". Six pollen zones were defined for this interval, which spans marine isotope stages (MIS) 101 and 100. Pollen zones 1 and 2 (MIS 101) as well as zones 3 and 4 (MIS 100) indicate the presence of Larix and Larix-Betula forests during interglaciations. The plant communities reflected in the spectra of zone 3 represent the warmest climates during the early Gelasian Age. During MIS 100, the period of maximum climate cooling is marked by the regional presence of shrub and herb dominated tundra (pollen zone 5). During the interstade (MIS 100, zone 6), the vegetation was dominated by Larix forest tundra. Pollen zones 3 and 4, which have spectra more indicative of interglacial rather than glacial plant communities, are more consistent with climate of MIS 101 and not MIS 100, as suggested by the core's age model. The incorrect age assignment of the boundary between these stages indicates that the Lake El'gygytgyn age model needs revision.
利用国际科考“El’gygytgyn钻探工程”中Elgygytgyn湖沉积物岩心的孢粉学研究，确定了极地楚科奇2.510 ~ 2.554 Ma期间植被对气候变化的响应。在这段地层中确定了6个花粉带，跨越了海洋同位素阶段(MIS) 101和100。花粉带1和2 (MIS 101)以及花粉带3和4 (MIS 100)表明间冰期存在落叶松和落叶松-桦木林。第3带光谱中反映的植物群落代表了早期Gelasian时代最温暖的气候。在MIS 100期间，气候降温最大的时期以灌木和草本植物为主的冻土带(花粉区5)为标志。在过渡期(MIS 100, 6区)，植被以落叶松林为主。花粉带3和4的光谱更能指示间冰期而不是冰期植物群落，与MIS 101的气候更一致，而不是MIS 100的气候。这些阶段之间的年龄划分不正确，表明El'gygytgyn湖的年龄模式需要修正。
{"title":"Vegetation Response to the Climate Change in Polar Chukotka from 2.510-2.554 Ma BP","authors":"A. Lozhkin, A. A. Andreev, P. Anderson, Yu. A. Korzun, E. Y. Nedorubova","doi":"10.34078/1814-0998-2023-2-42-51","DOIUrl":"https://doi.org/10.34078/1814-0998-2023-2-42-51","url":null,"abstract":"The response of vegetation to climate change in Polar Chukotka between 2.510 and 2.554 Ma was determined by a palynological study of sediment cores from Lake Elgygytgyn recovered during the international expedition \"El'gygytgyn Drilling Project\". Six pollen zones were defined for this interval, which spans marine isotope stages (MIS) 101 and 100. Pollen zones 1 and 2 (MIS 101) as well as zones 3 and 4 (MIS 100) indicate the presence of Larix and Larix-Betula forests during interglaciations. The plant communities reflected in the spectra of zone 3 represent the warmest climates during the early Gelasian Age. During MIS 100, the period of maximum climate cooling is marked by the regional presence of shrub and herb dominated tundra (pollen zone 5). During the interstade (MIS 100, zone 6), the vegetation was dominated by Larix forest tundra. Pollen zones 3 and 4, which have spectra more indicative of interglacial rather than glacial plant communities, are more consistent with climate of MIS 101 and not MIS 100, as suggested by the core's age model. The incorrect age assignment of the boundary between these stages indicates that the Lake El'gygytgyn age model needs revision.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116200232","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}
Pub Date : 2023-06-30DOI: 10.34078/1814-0998-2023-2-84-95
R. R. Yusupov, R. R. Yusupov
Experimental work was carried out to find out the timing of the fertility preservation for eggs remaining in the body cavity of the North Sea Alaska Pollock females after spawning, as well as the possibility of their normal course of embryogenesis. It was established that eggs remaining after spawning in the pollock female body cavity are not resorbed simultaneously. 2 months after mass spawning, 2.7 % of them still retain fertility, and, with artificial insemination, they are characterized by high survival, suffering no violations during embryogenesis. Data on the embryonic development of the species, the timing of the steps and main stages of embryogenesis, and the amount of heat required to achieve them are given. It is shown that pollock eggs and pre-larvae from residual fertility are significantly smaller in metric parameters than those from natural spawning, but morphologically are identical to them. Regional features of morphometric indicators for eggs and newly hatched pollock larvae in the northern part of the Sea of Okhotsk were revealed.
{"title":"О сроках сохранения фертильности икры и эмбриональном развитии минтая Gadus chalcogrammus (Gadidae) северной части Охотского моря","authors":"R. R. Yusupov, R. R. Yusupov","doi":"10.34078/1814-0998-2023-2-84-95","DOIUrl":"https://doi.org/10.34078/1814-0998-2023-2-84-95","url":null,"abstract":"Experimental work was carried out to find out the timing of the fertility preservation for eggs remaining in the body cavity of the North Sea Alaska Pollock females after spawning, as well as the possibility of their normal course of embryogenesis. It was established that eggs remaining after spawning in the pollock female body cavity are not resorbed simultaneously. 2 months after mass spawning, 2.7 % of them still retain fertility, and, with artificial insemination, they are characterized by high survival, suffering no violations during embryogenesis. Data on the embryonic development of the species, the timing of the steps and main stages of embryogenesis, and the amount of heat required to achieve them are given. It is shown that pollock eggs and pre-larvae from residual fertility are significantly smaller in metric parameters than those from natural spawning, but morphologically are identical to them. Regional features of morphometric indicators for eggs and newly hatched pollock larvae in the northern part of the Sea of Okhotsk were revealed.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"53 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132801776","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}
Pub Date : 2023-06-30DOI: 10.34078/1814-0998-2023-2-76-83
A. M. Tokranov, M. Y. Zheleznyak
Basing on materials collected in April-September 2014-2022 in the intertidal zone of the northeastern part of Avacha Bay, the seasonal dynamics of the size-age structure of stone cockscomb Alectrias alectrolophus living here was analyzed. It has been established that in April through late June this species is represented in the littoral by individuals in the second year of life (1+) (body length 35-67 mm, body weight 0.19-1.37 g) as well as by individuals aged 2+ to 7 years (64-143 mm, 1.09-15.9 g, respectively), which form two rather well-separated size groups of fish. In August, as the size of individuals in the second year of life (1+) increases, these groups merge, forming a single bimodal curve of size composition. In the second half of June, underyearlings of the stone cockscomb, 16-20 mm long with a body weight of 20-30 mg, begin to appear in the intertidal zone, forming the third size group from 20 to 35 mm with a body weight of 40-230 mg in July. Therefore, starting from July, in the intertidal zone of Avacha Bay, the stone cockscomb of all age groups, from underyearlings to individuals 7+ years old, lives. Data on seasonal changes in the ratio of juveniles and adult fish in the intertidal zone are presented.
基于2014-2022年4- 9月在阿瓦查湾东北部潮间带采集的资料，分析了生活在这里的石鸡冠Alectrias alectrolophus的尺寸-年龄结构的季节动态。在4月至6月下旬，该物种在沿海地区以2岁(1+)的个体(体长35-67 mm，体重0.19-1.37 g)和2+至7岁的个体(64-143 mm, 1.09-15.9 g)为代表，形成了两个相当分开的大小群。在8月，随着第二年(1+)个体的增加，这些群体合并，形成一个单一的双峰曲线的大小组成。6月下半月，潮间带开始出现长16-20毫米、体重20-30毫克的石鸡冠幼雏，7月形成体重40-230毫克、体重20- 35毫米的第三体型群。因此，从7月开始，在阿瓦查湾潮间带，从幼雏到7岁以上的个体，各个年龄段的石鸡冠都在生活。介绍了潮间带幼鱼和成鱼比例的季节变化数据。
{"title":"Сезонная динамика размерно-возрастной структуры бурого морского петушка Alectrias alectrolophus (Stichaeidae) в приливно-отливной зоне Авачинской губы (Юго-Восточная Камчатка)","authors":"A. M. Tokranov, M. Y. Zheleznyak","doi":"10.34078/1814-0998-2023-2-76-83","DOIUrl":"https://doi.org/10.34078/1814-0998-2023-2-76-83","url":null,"abstract":"Basing on materials collected in April-September 2014-2022 in the intertidal zone of the northeastern part of Avacha Bay, the seasonal dynamics of the size-age structure of stone cockscomb Alectrias alectrolophus living here was analyzed. It has been established that in April through late June this species is represented in the littoral by individuals in the second year of life (1+) (body length 35-67 mm, body weight 0.19-1.37 g) as well as by individuals aged 2+ to 7 years (64-143 mm, 1.09-15.9 g, respectively), which form two rather well-separated size groups of fish. In August, as the size of individuals in the second year of life (1+) increases, these groups merge, forming a single bimodal curve of size composition. In the second half of June, underyearlings of the stone cockscomb, 16-20 mm long with a body weight of 20-30 mg, begin to appear in the intertidal zone, forming the third size group from 20 to 35 mm with a body weight of 40-230 mg in July. Therefore, starting from July, in the intertidal zone of Avacha Bay, the stone cockscomb of all age groups, from underyearlings to individuals 7+ years old, lives. Data on seasonal changes in the ratio of juveniles and adult fish in the intertidal zone are presented.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132294937","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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