51
|
Bolotov IN, Konopleva ES, Vikhrev IV, Lopes-Lima M, Bogan AE, Lunn Z, Chan N, Win T, Aksenova OV, Gofarov MY, Tomilova AA, Kondakov AV. Eight new freshwater mussels (Unionidae) from tropical Asia. Sci Rep 2019; 9:12053. [PMID: 31427656 PMCID: PMC6700347 DOI: 10.1038/s41598-019-48528-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2019] [Accepted: 08/07/2019] [Indexed: 11/25/2022] Open
Abstract
Freshwater mussels are sensitive to habitat and water quality, revealing the fastest rates of human-mediated global extinction among aquatic animals. These animals are especially diverse in tropical Asia, the faunas of which are characterized by high levels of endemism. Here we describe four new species and four new subspecies of freshwater mussels from Myanmar. Leoparreysia whittenisp. nov., the smallest representative of this genus, was discovered from the Ayeyarwady and Chindwin rivers. Radiatula myitthanensissp. nov. and R. chindwinensissp. nov. were recorded from the Chindwin Basin, and R. mouhoti haungthayawensisssp. nov. has been discovered from the Haungthayaw River. Indochinella pugio has been revised with a description of three subspecies: I. pugio viridissimassp. nov. from the Sittaung, Bilin and Bago rivers, I. pugio daweiensisssp. nov. from the Dawei River, and I. pugio paradoxassp. nov. from the Haungthayaw River. Yaukthwa elongatulasp. nov., a peculiar species, conchologically resembling representatives of the genus Solenaia (Gonideinae) with ultra-elongated shell was found in the Chindwin Basin. Our records highlight that tropical Asia harbors numerous, but still overlooked local endemic lineages of freshwater bivalves, which may be on the brink of extinction due to the high anthropogenic and climate change impacts.
Collapse
|
52
|
Potapov GS, Kondakov AV, Filippov BY, Gofarov MY, Kolosova YS, Spitsyn VM, Tomilova AA, Zubrii NA, Bolotov IN. Pollinators on the polar edge of the Ecumene: taxonomy, phylogeography, and ecology of bumble bees from Novaya Zemlya. Zookeys 2019; 866:85-115. [PMID: 31388324 PMCID: PMC6669216 DOI: 10.3897/zookeys.866.35084] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Accepted: 06/15/2019] [Indexed: 11/22/2022] Open
Abstract
The High Arctic bumble bee fauna is rather poorly known, while a growing body of recent molecular research indicates that several Arctic species may represent endemic lineages with restricted ranges. Such local endemics are in need of special conservation efforts because of the increasing anthropogenic pressure and climate changes. Here, we re-examine the taxonomic and biogeographic affinities of bumble bees from Novaya Zemlya using historical samples and recently collected materials (1895–1925 vs. 2015–2017). Three bumble bee species inhabit the Yuzhny (Southern) Island and the southern edge of Severny (Northern) Island of this archipelago: Bombusglacialis Friese, 1902, B.hyperboreus Schönherr, 1809, and B.pyrrhopygus Friese, 1902. Bombusglacialis shares three unique COI haplotypes that may indicate its long-term (pre-glacial) persistence on Novaya Zemlya. In contrast, Bombushyperboreus and B.pyrrhopygus share a rather low molecular divergence from mainland populations, with the same or closely related haplotypes as those from Arctic Siberia and Norway. A brief re-description of Bombuspyrrhopygus based on the newly collected topotypes is presented. Habitats, foraging plants and life cycles of bumble bees on Novaya Zemlya are characterized, and possible causes of extremely low bumble bee abundance on the archipelago are discussed. The species-poor bumble bee fauna of Novaya Zemlya is compared with those in other areas throughout the Arctic. The mean bumble bee species richness on the Arctic Ocean islands is three times lower than that in the mainland Arctic areas (3.1 vs. 8.6 species per local fauna, respectively). General linear models (GLMs) indicate that this difference can be explained by specific environmental conditions of insular areas. Our findings highlight that the insularity is a significant factor sharply decreasing species richness in bumble bee assemblages on the Arctic Ocean archipelagoes through colder climate (lower summer temperatures), prevalence of harsh Arctic tundra landscapes with poor foraging resources, and in isolation from the mainland.
Collapse
|
53
|
Spitsyn VM, Bolotov IN, Kondakov AV, Tomilova AA. ESTIGENA WALLACEI SP. NOV. FROM WEST FLORES, INDONESIA (LEPIDOPTERA: LASIOCAMPIDAE). ECOLOGICA MONTENEGRINA 2019. [DOI: 10.37828/em.2019.22.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Here we describe Estigena wallacei sp. nov., an endemic species from West Flores, Indonesia. No Estigena species were known from Flores Island so far, while E. caesarea (Zolotuhin & Witt, 2005) was described from Timor Island. The relationship between these two taxa is unclear, because E. caesarea was described based on four male specimens, whereas our species from Flores is known from a single female. However, the COI sequence of E. cf. caesarea from Timor available in the BOLD database is distant from that of the new species supporting our taxonomic hypothesis on the separate species-level status of E. wallacei sp. nov.
Collapse
|
54
|
Spitsyn VM, Kondakov AV, Tomilova AA, Bolotov IN. <strong>A NEW SPECIES AND NEW SUBSPECIES OF <em>EUDIAPHORA </em>DUBATOLOV, 1990 (LEPIDOPTERA, EREBIDAE, ARCTIINAE) FROM TIEN-SHAN AND PAMIR RANGES</strong>. ECOLOGICA MONTENEGRINA 2019. [DOI: 10.37828/em.2019.22.7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Eudiaphora Dubatolov, 1990 was described as a monotypic genus for E. turensis (Erschoff, 1874) with three subspecies. Here, we describe one more subspecies, E. turensis nozimdjoni Spitsyn, Bolotov & Kondakov ssp. nov. from the Pamir Mountains (Tajikistan). Furthermore, we found an additional species in this genus, E. tienshanensis Spitsyn, Bolotov & Kondakov sp. nov. from the Tien-Shan Mountains (Kyrgyzstan). The valid status of both novel taxa is confirmed using a phylogenetic approach. An identification key for all taxa in this genus is provided.
Collapse
|
55
|
Bolotov IN, Spitsyn VM, Kondakov AV, Tomilova AA. A REVIEW OF BARSINE (LEPIDOPTERA: EREBIDAE: ARCTIINAE: LITHOSIINI) FROM THE EAST NUSA TENGGARA ISLANDS, INDONESIA, WITH DESCRIPTION OF A NEW GENUS. ECOLOGICA MONTENEGRINA 2019. [DOI: 10.37828/em.2019.20.17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The Lepidoptera fauna of the East Nusa Tenggara Islands in Indonesia was thought to comprise two species in the genus Barsine Walker, 1854, i.e. B. dohertyi (Rothschild, 1913) and B. podbolotskayae Spitsyn & Bolotov, 2018. However, we found that B. podbolotskayae is a member of its own monotypic genus, Albarrania Bolotov, Spitsyn & Kondakov gen. nov. The new combination is proposed as follows: Albarrania podbolotskayae (Spitsyn & Bolotov, 2018) gen. & comb. nov.
Collapse
|
56
|
Konopleva ES, Pfeiffer JM, Vikhrev IV, Kondakov AV, Gofarov MY, Aksenova OV, Lunn Z, Chan N, Bolotov IN. A new genus and two new species of freshwater mussels (Unionidae) from western Indochina. Sci Rep 2019; 9:4106. [PMID: 30858440 PMCID: PMC6411986 DOI: 10.1038/s41598-019-39365-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Accepted: 01/23/2019] [Indexed: 11/09/2022] Open
Abstract
The systematics of Oriental freshwater mussels (Bivalvia: Unionidae) is poorly known. Here, we present an integrative revision of the genus Trapezoideus Simpson, 1900 to further understanding of freshwater mussel diversity in the region. We demonstrate that Trapezoideus as currently circumscribed is non-monophyletic, with its former species belonging to six other genera, one of which is new to science and described here. We recognize Trapezoideus as a monotypic genus, comprised of the type species, T. foliaceus. Trapezoideus comptus, T. misellus, T. pallegoixi, and T. peninsularis are transferred to the genus Contradens, T. subclathratus is moved to Indonaia, and T. theca is transferred to Lamellidens. Trapezoideus prashadi is found to be a junior synonym of Arcidopsis footei. Trapezoideus dallianus, T. nesemanni, T. panhai, T. peguensis, and two species new to science are placed in Yaukthwagen. nov. This genus appears to be endemic of the Western Indochina Subregion. The two new species, Yaukthwa paiensissp. nov. and Y. inlenensissp. nov., are both endemic to the Salween River basin. Our results highlight that Southeast Asia is a species-rich freshwater mussel diversity hotspot with numerous local endemic species, which are in need of special conservation efforts.
Collapse
|
57
|
Klass AL, Sokolova SE, Kondakov AV, Bespalaya YV, Gofarov MY, Tomilova AA, Vikhrev IV, Bolotov IN. An example of a possible leech-bryozoan association in freshwater. Zookeys 2018:23-30. [PMID: 30416338 PMCID: PMC6224368 DOI: 10.3897/zookeys.794.28088] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Accepted: 09/17/2018] [Indexed: 11/12/2022] Open
Abstract
Associations of various invertebrate species with bryozoans and sponges are a well-known marine phenomenon but such epizooic communities are far less diverse in freshwater environments. Here an occurrence of numerous leeches Alboglossiphoniacf.papillosa (Braun, 1805), in interstitial spaces between zooids of a colony of the freshwater bryozoan species Plumatellaaff.fungosa (Pallas, 1768) in Eastern Siberia is described. To the best of our knowledge, this record appears to be the first known example of a leech-bryozoan association, although such relationships deserve further research.
Collapse
|
58
|
Lopes-Lima M, Bolotov IN, Do VT, Aldridge DC, Fonseca MM, Gan HM, Gofarov MY, Kondakov AV, Prié V, Sousa R, Varandas S, Vikhrev IV, Teixeira A, Wu RW, Wu X, Zieritz A, Froufe E, Bogan AE. Expansion and systematics redefinition of the most threatened freshwater mussel family, the Margaritiferidae. Mol Phylogenet Evol 2018; 127:98-118. [DOI: 10.1016/j.ympev.2018.04.041] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 04/09/2018] [Accepted: 04/30/2018] [Indexed: 01/10/2023]
|
59
|
Potapov GS, Kondakov AV, Kolosova YS, Tomilova AA, Filippov BY, Gofarov MY, Bolotov IN. Widespread continental mtDNA lineages prevail in the bumblebee fauna of Iceland. Zookeys 2018:141-153. [PMID: 30057467 PMCID: PMC6056568 DOI: 10.3897/zookeys.774.26466] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 06/13/2018] [Indexed: 11/12/2022] Open
Abstract
Origins of the fauna in Iceland is controversial, although the majority of modern research supports the postglacial colonization of this island by terrestrial invertebrates rather than their long-term survival in glacial refugia. In this study, we use three bumblebee species as a model to test the hypothesis regarding possible cryptic refugia in Iceland and to evaluate a putative origin of recently introduced taxa. Bombusjonellus is thought to be a possible native Icelandic lineage, whereas B.lucorum and B.hortorum were evidently introduced in the second half of the 20th century. These phylogeographic analyses reveal that the Icelandic Bombusjonellus shares two COI lineages, one of which also occurs in populations on the British Isles and in mainland Europe, but a second lineage (BJ-02) has not been recorded anywhere. These results indicate that this species may have colonized Iceland two times and that the lineage BJ-02 may reflect a more ancient Late Pleistocene or Early Holocene founder event (e.g., from the British Isles). The Icelandic populations of both Bombuslucorum and B.hortorum share the COI lineages that were recorded as widespread throughout Eurasia, from the European countries across Russia to China and Japan. The findings presented here highlight that the bumblebee fauna of Iceland comprises mainly widespread ubiquitous lineages that arrived via natural or human-mediated dispersal events from the British Isles or the mainland.
Collapse
|
60
|
Aksenova OV, Bolotov IN, Gofarov MY, Kondakov AV, Vinarski MV, Bespalaya YV, Kolosova YS, Palatov DM, Sokolova SE, Spitsyn VM, Tomilova AA, Travina OV, Vikhrev IV. Species Richness, Molecular Taxonomy and Biogeography of the Radicine Pond Snails (Gastropoda: Lymnaeidae) in the Old World. Sci Rep 2018; 8:11199. [PMID: 30046044 PMCID: PMC6060155 DOI: 10.1038/s41598-018-29451-1] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 07/12/2018] [Indexed: 11/09/2022] Open
Abstract
The radicine pond snails represent a species-rich and widely distributed group, many species of which are key vectors of human and animal trematodoses. Here we clarify the taxonomy, distribution and evolutionary biogeography of the radicine lymnaeids in the Old World based on the most comprehensive multi-locus molecular dataset sampled to date. We show that the subfamily Amphipepleinae is monophyletic and contains at least ten genus-level clades: Radix Montfort, 1810, Ampullaceana Servain, 1881, Peregriana Servain, 1881, Tibetoradix Bolotov, Vinarski & Aksenova gen. nov., Kamtschaticana Kruglov & Starobogatov, 1984, Orientogalba Kruglov & Starobogatov, 1985, Cerasina Kobelt, 1881, Myxas G. B. Sowerby I, 1822, Bullastra Bergh, 1901, and Austropeplea Cotton, 1942. With respect to our phylogeny, species-delimitation model and morphological data, the Old World fauna includes 35 biological species of radicines. Tibet and Eastern Europe harbor the richest faunas, while East Asia and Africa appear to be the most species-poor areas. The radicine clade could have originated near the Cretaceous - Paleocene boundary. The Miocene great lakes in Eurasia seems to be the most important evolutionary hotspots shaping spatial patterns of recent species richness. Finally, we present the first DNA barcode reference library for the reliable molecular identification of species within this group.
Collapse
|
61
|
Bolotov IN, Aksenova OV, Bakken T, Glasby CJ, Gofarov MY, Kondakov AV, Konopleva ES, Lopes-Lima M, Lyubas AA, Wang Y, Bychkov AY, Sokolova AM, Tanmuangpak K, Tumpeesuwan S, Vikhrev IV, Shyu JBH, Win T, Pokrovsky OS. Discovery of a silicate rock-boring organism and macrobioerosion in fresh water. Nat Commun 2018; 9:2882. [PMID: 30038289 PMCID: PMC6056532 DOI: 10.1038/s41467-018-05133-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 06/15/2018] [Indexed: 11/16/2022] Open
Abstract
Macrobioerosion is a common process in marine ecosystems. Many types of rock-boring organisms break down hard substrates, particularly carbonate rocks and calcareous structures such as dead corals and shells. In paleontology, the presence of rocks with boreholes and fossil macroboring assemblage members is one of the primary diagnostic features of shallow marine paleo-environments. Here we describe a silicate rock-boring organism and an associated community in submerged siltstone rock outcrops in Kaladan River, Myanmar. The rock-boring mussel Lignopholas fluminalis is a close relative of the marine piddocks, and its borings belong to the ichnospecies Gastrochaenolites anauchen. The neotectonic uplift of the area leading to gradual decrease of the sea level with subsequent shift from estuarine to freshwater environment was the most likely driver for the origin of this community. Our findings highlight that rocks with macroborings are not an exclusive indicator of marine paleo-ecosystems, but may also reflect freshwater habitats. Macrobioerosion, the boring of rock and other hard substrates by living organisms, is used as a marker of marine paleo-environments. Here, Bolotov et al. describe a rock-boring mussel and its associated community from freshwater in Myanmar, demonstrating that macrobioerosion is a wider phenomenon.
Collapse
|
62
|
Bolotov IN, Pfeiffer JM, Konopleva ES, Vikhrev IV, Kondakov AV, Aksenova OV, Gofarov MY, Tumpeesuwan S, Win T. A new genus and tribe of freshwater mussel (Unionidae) from Southeast Asia. Sci Rep 2018; 8:10030. [PMID: 29968793 PMCID: PMC6030202 DOI: 10.1038/s41598-018-28385-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Accepted: 06/21/2018] [Indexed: 11/26/2022] Open
Abstract
The freshwater mussel genus Oxynaia Haas, 1911 is thought to be comprised of two geographically disjunct and morphologically variable species groups but the monophyly of this taxon has yet to be tested in any modern cladistic sense. This generic hypothesis has important systematic and biogeographic implications as Oxynaia is the type genus of the currently recognized tribe Oxynaiini (Parreysiinae) and is one of the few genera thought to cross several biogeographically important barriers in Southeast Asia. Morphological and molecular data clearly demonstrate that Oxynaia is not monophyletic, and the type species and its allies (O. jourdyi group) belong to the Unioninae, and more specifically as members of the genus Nodularia Conrad, 1853. Therefore, neither Oxynaiasyn. nov. nor Oxynaiini Starobogatov, 1970 are applicable to the Parreysiinae and in the absence of an available name, Indochinellagen. nov. and Indochinellini trib. nov. are described. Several combinations are proposed as follows: Indochinella pugio (Benson, 1862) gen. et comb. nov., Nodularia jourdyi (Morlet, 1886) comb. res., N. gladiator (Ancey, 1881) comb. res., N. diespiter (Mabille, 1887) comb. res. and N. micheloti (Morlet, 1886) comb. res. Finally, we provide an updated freshwater biogeographic division of Southeast Asia.
Collapse
|
63
|
Spitsyn VM, Kondakov AV, Tomilova AA, Pham NT, Bolotov IN. BARSINE VINHPHUCENSIS SP. NOV. FROM VIETNAM (LEPIDOPTERA: EREBIDAE: ARCTIINAE: LITHOSIINI). ECOLOGICA MONTENEGRINA 2018. [DOI: 10.37828/em.2018.18.3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Barsine vinhphucensis sp. nov. (Lepidoptera: Erebidae: Arctiinae) has been discovered from mountain tropical forest of northern Vietnam. The new species differs from all the other members of the genus by a characteristic pattern and male genitalia structure. It appears to be a local endemic species of the Tam Dao Mountain Range.
Collapse
|
64
|
Spitsyn VM, Kondakov AV, Bolotov NI, Thi Pham N, Gofarov MY, Bolotov IN. DNA barcoding unravels contrasting evolutionary history of two widespread Asian tiger moth species during the Late Pleistocene. PLoS One 2018; 13:e0194200. [PMID: 29617397 PMCID: PMC5884489 DOI: 10.1371/journal.pone.0194200] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 02/27/2018] [Indexed: 12/02/2022] Open
Abstract
Populations of widespread pest insects in tropical areas are characterized by a complex evolutionary history, with overlapping natural and human-mediated dispersal events, sudden expansions, and bottlenecks. Here, we provide biogeographic reconstructions for two widespread pest species in the tiger moth genus Creatonotos (Lepidoptera: Erebidae: Arctiinae) based on the mitochondrial cytochrome c oxidase subunit I (COI) gene. The Asian Creatonotos transiens reveals shallow genetic divergence between distant populations that does not support its current intraspecific systematics with several local subspecies. In contrast, the more widespread Creatonotos gangis comprises at least three divergent subclades corresponding to certain geographic areas, i.e. Australia, Arabia + South Asia and Southeast Asia. With respect to our approximate Bayesian computation (ABC) model, the expansion of Creatonotos gangis into Australia is placed in the Late Pleistocene (~65–63 ka). This dating coincide with an approximate time of the earliest human migration into the continent (~65–54 ka) and the period of intervisibility between Timor and Australia (~65–62 ka). Our findings highlight that the drying Sunda and Sahul shelf areas likely support successful migrations of Asian taxa into Australia during the Pleistocene. The phylogeographic patterns discovered in this study can be used to improve the effectiveness of integrated pest control programs that is a task of substantial practical importance to a broad range of agricultural stakeholders.
Collapse
|
65
|
Bespalaya YV, Bolotov IN, Aksenova OV, Kondakov AV, Gofarov MY, Laenko TM, Sokolova SE, Shevchenko AR, Travina OV. Aliens are moving to the Arctic frontiers: an integrative approach reveals selective expansion of androgenic hybrid Corbicula lineages towards the North of Russia. Biol Invasions 2018. [DOI: 10.1007/s10530-018-1698-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
66
|
Bolotov IN, Kondakov AV, Spitsyn VM. A REVIEW OF TIGER MOTHS (LEPIDOPTERA: EREBIDAE: ARCTIINAE: ARCTIINI) FROM FLORES ISLAND, LESSER SUNDA ARCHIPELAGO, WITH DESCRIPTION OF A NEW SPECIES AND NEW SUBSPECIES. ECOLOGICA MONTENEGRINA 2018. [DOI: 10.37828/em.2018.16.1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The Wallacean Region is considered a unique evolutionary hotspot, but the current knowledge of lepidopteran faunas on certain islands is very far from being complete. Here we present a preliminary checklist of the Arctiini fauna of the Flores Island based on available collection materials and a review of the body of literature. In total, for the island fauna we list 22 tiger moth species, with eight newly recorded species. Among novel records, local endemic Spilarctia mikeli Bolotov, Kondakov & Spitsyn sp. nov. and Aloa cardinalis danau Bolotov, Kondakov & Spitsyn ssp. nov. were discovered. Additionally, several taxa with broad ranges such as Amerila astreus, Creatonotos gangis, Euchromia horsfieldi, Lemyra maculifascia, Nyctemera distincta and Utetheisa pulchelloides were new for the island fauna. In general, 15 taxa are prospective endemic Wallacean elements, among which seven taxa are unknown outside the Flores Island: Orhantarctia cymbalophoroides, Lemyra everetti, L. floresina, Aethalida owadai floresiensis, Nyctemera scalarium regalis, Spilarctia mikeli sp. nov. and Aloa cardinalis danau ssp. nov. Our findings reveal that the tiger moth fauna of the Flores Island has rather moderate level of endemism, with only 32% of putative endemic taxa.
Collapse
|
67
|
Bolotov IN, Makhrov AA, Gofarov MY, Aksenova OV, Aspholm PE, Bespalaya YV, Kabakov MB, Kolosova YS, Kondakov AV, Ofenböck T, Ostrovsky AN, Popov IY, von Proschwitz T, Rudzīte M, Rudzītis M, Sokolova SE, Valovirta I, Vikhrev IV, Vinarski MV, Zotin AA. Climate Warming as a Possible Trigger of Keystone Mussel Population Decline in Oligotrophic Rivers at the Continental Scale. Sci Rep 2018; 8:35. [PMID: 29311629 PMCID: PMC5758527 DOI: 10.1038/s41598-017-18873-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Accepted: 12/19/2017] [Indexed: 11/09/2022] Open
Abstract
The effects of climate change on oligotrophic rivers and their communities are almost unknown, albeit these ecosystems are the primary habitat of the critically endangered freshwater pearl mussel and its host fishes, salmonids. The distribution and abundance of pearl mussels have drastically decreased throughout Europe over the last century, particularly within the southern part of the range, but causes of this wide-scale extinction process are unclear. Here we estimate the effects of climate change on pearl mussels based on historical and recent samples from 50 rivers and 6 countries across Europe. We found that the shell convexity may be considered an indicator of the thermal effects on pearl mussel populations under warming climate because it reflects shifts in summer temperatures and is significantly different in viable and declining populations. Spatial and temporal modeling of the relationship between shell convexity and population status show that global climate change could have accelerated the population decline of pearl mussels over the last 100 years through rapidly decreasing suitable distribution areas. Simulation predicts future warming-induced range reduction, particularly in southern regions. These results highlight the importance of large-scale studies of keystone species, which can underscore the hidden effects of climate warming on freshwater ecosystems.
Collapse
|
68
|
Bolotov IN, Kondakov AV, Spitsyn VM, Gofarov MY, Kolosova YS. Leptocneria vinarskii sp. nov. (Lepidoptera: Erebidae: Lymantriinae), an overlooked Wallacean lineage of the Australian genus. Sci Rep 2017; 7:12430. [PMID: 28963487 PMCID: PMC5622091 DOI: 10.1038/s41598-017-12797-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 09/15/2017] [Indexed: 11/28/2022] Open
Abstract
The tussock moth genus Leptocneria Butler, 1886 (Lepidoptera: Erebidae: Lymantriinae) has been considered an entirely Australian taxon that includes two species: L. reducta (Walker, 1855) and L. binotata Butler, 1886. However, we discovered a divergent lineage of Leptocneria inhabiting Flores Island, Lesser Sundas, Indonesia. Here, we describe this lineage as the third species of the genus, L. vinarskii Bolotov, Kondakov et Spitsyn sp. nov. The new species is sister to L. reducta but differs from it by dark gray marking patterns of the forewing that lack orange or dark yellow marks. The mean COI genetic distance between L. vinarskii sp. nov. and L. reducta sensu lato is 2.9%. Our findings confirm that the Wallacean region was a faunal exchange area between Sundaland and Sahul during the Pleistocene but highlight that the vicariance events may have played a crucial role in origin of the endemic faunas on the islands of East Nusa Tenggara. Additionally, we show that both Australian species most likely represent cryptic species complexes, which are in need of further taxonomic revision.
Collapse
|
69
|
Vikhrev IV, Bolotov IN, Altun A, Gofarov MY, Dvoryankin GA, Kondakov AV, Ozcan T, Ozcan G. The revenant: rediscovery of Margaritifera homsensis from Orontes drainage with remarks on its taxonomic status and conservation (Bivalvia: Margaritiferidae). SYST BIODIVERS 2017. [DOI: 10.1080/14772000.2017.1343876] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
70
|
Bolotov IN, Kondakov AV, Vikhrev IV, Aksenova OV, Bespalaya YV, Gofarov MY, Kolosova YS, Konopleva ES, Spitsyn VM, Tanmuangpak K, Tumpeesuwan S. Ancient River Inference Explains Exceptional Oriental Freshwater Mussel Radiations. Sci Rep 2017; 7:2135. [PMID: 28522869 PMCID: PMC5437074 DOI: 10.1038/s41598-017-02312-z] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 04/07/2017] [Indexed: 11/18/2022] Open
Abstract
The concept of long-lived (ancient) lakes has had a great influence on the development of evolutionary biogeography. According to this insight, a number of lakes on Earth have existed for several million years (e.g., Baikal and Tanganyika) and represent unique evolutionary hotspots with multiple intra-basin radiations. In contrast, rivers are usually considered to be variable systems, and the possibility of their long-term existence during geological epochs has never been tested. In this study, we reconstruct the history of freshwater basin interactions across continents based on the multi-locus fossil-calibrated phylogeny of freshwater mussels (Unionidae). These mussels most likely originated in Southeast and East Asia in the Jurassic, with the earliest expansions into North America and Africa (since the mid-Cretaceous) following the colonization of Europe and India (since the Paleocene). We discovered two ancient monophyletic mussel radiations (mean age ~51–55 Ma) within the paleo-Mekong catchment (i.e., the Mekong, Siam, and Malacca Straits paleo-river drainage basins). Our findings reveal that the Mekong may be considered a long-lived river that has existed throughout the entire Cenozoic epoch.
Collapse
|
71
|
Konopleva ES, Bolotov IN, Vikhrev IV, Gofarov MY, Kondakov AV. An integrative approach underscores the taxonomic status of Lamellidens exolescens, a freshwater mussel from the Oriental tropics (Bivalvia: Unionidae). SYST BIODIVERS 2016. [DOI: 10.1080/14772000.2016.1249530] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
72
|
Bolotov IN, Vikhrev IV, Bespalaya YV, Gofarov MY, Kondakov AV, Konopleva ES, Bolotov NN, Lyubas AA. Multi-locus fossil-calibrated phylogeny, biogeography and a subgeneric revision of the Margaritiferidae (Mollusca: Bivalvia: Unionoida). Mol Phylogenet Evol 2016; 103:104-121. [DOI: 10.1016/j.ympev.2016.07.020] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Revised: 07/01/2016] [Accepted: 07/18/2016] [Indexed: 11/16/2022]
|
73
|
Bolotov IN, Bespalaya YV, Gofarov MY, Kondakov AV, Konopleva ES, Vikhrev IV. Spreading of the Chinese pond mussel, Sinanodonta woodiana, across Wallacea: One or more lineages invade tropical islands and Europe. BIOCHEM SYST ECOL 2016. [DOI: 10.1016/j.bse.2016.05.018] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
74
|
Bolotov IN, Matyot P, Bippus M, Spitsyn VM, Kolosova YS, Kondakov AV. Redescription of Thalassodes antithetica Herbulot, 1962, an endemic moth from Inner Seychelles (Lepidoptera: Geometridae: Geometrinae). Zootaxa 2016; 4139:135-9. [PMID: 27470792 DOI: 10.11646/zootaxa.4139.1.10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Indexed: 11/04/2022]
Abstract
The Seychelles archipelago is characterized by an exceptionally high level of endemism in certain taxa, including at least 275 endemic species of Lepidoptera (Legrand 1966; Gerlach & Matyot 2006; De Prins & De Prins 2015). Despite the fact that endemics are the main objects of conservation efforts, information regarding endemic Seychelles Lepidoptera is very poor, because the majority of them are known from a single or a few specimens (Legrand 1966; Gerlach and Matyot 2006; Bolotov et al. 2014, 2015). The emerald moth specimens are lacking in extensive samples obtained by earlier collectors (Fletcher 1910; Scott 1910; Fryer 1912). Further, two emerald moth species in the genus Thalassodes Guenée, 1858 have been reported from Seychelles, i.e., the widespread T. quadraria Guenée, 1858 (Legrand 1966; Gerlach & Matyot 2006; De Prins & De Prins 2015) and the endemic T. antithetica Herbulot, 1962. The latter species is known from eight specimens, collected between 1959 and 1963 (Legrand 1966; Gerlach & Matyot 2006). Herbulot (1962) provided a very short description of this species without any illustration. The protologue consists of a description of some external characters, i.e., antennae, palpi and legs, as well as the pattern of markings, but the male and female genitalia are not described. As the main diagnostic features, Herbulot (1962) noted two specific characters in the male morphology, namely the hind tibia with a single pair of spurs and an exceptional development of the lateral processes (octavals) on the posterior margin of the eighth sternite.
Collapse
|
75
|
Aksenova OV, Bespalaya YV, Bolotov IN, Kondakov AV, Sokolova SE. First molecular identification of Australapatemon burti (Miller, 1923) (Trematoda: Digenea: Strigeidae) from an intermediate host Radix labiata (Rossmaessler) (Gastropoda: Lymnaeidae) in Europe. Zootaxa 2016; 4132:588-90. [PMID: 27395696 DOI: 10.11646/zootaxa.4132.4.10] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Indexed: 11/04/2022]
Abstract
The strigeid digenean species Australapatemon burti (Miller, 1923) (Trematoda: Digenea: Strigeidae) was originally described from North America, but recorded in the Neotropical region (Drago et al. 2007; Hernández-Mena et al. 2014; Blasco-Costa et al. 2016) and in Central Europe (Faltýnková et al. 2007). In Europe, this species is rare, and there is not much information about its range (Faltýnková et al. 2007; Soldánová et al. 2012). Australapatemon burti has a complex life cycle with three larval stages, two of which (sporocyst and cercaria) use several species of freshwater snails, and the third stage (metacercaria) use non-specific host hirudineans (Dubois 1968; Davies & Ostrowski de Núñez 2012; Blasco-Costa et al. 2016). Adult flukes are parasitic in the intenstines of various waterfowl species, such as ducks and swans (Drago et al. 2007; Hernández-Mena et al. 2014). Currently, the molecular data on this parasite species includes only nucleotide sequences of four adult specimens from Mexico (Hernández-Mena et al. 2014). Their hosts were Mexican duck, Anas diazi Ridgway, American Wigeon, Anas americana Gmelin, Cinnamon Teal, Anas cyanoptera Vieillot, and Ruddy Duck, Oxyura jamaicensis (Gmelin) (Anserformes: Anatidae).
Collapse
|
76
|
Vinarski MV, Aksenova OV, Bespalaya YV, Bolotov IN, Gofarov MY, Kondakov AV. Ladislavella tumrokensis: The first molecular evidence of a Nearctic clade of lymnaeid snails inhabiting Eurasia. SYST BIODIVERS 2016. [DOI: 10.1080/14772000.2016.1140244] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
77
|
Spitsyn VM, Kondakov AV, Tomilova AA, Karamkhudoeva M, Potapov GS. A taxonomic revision of the butterfly genera Esperarge and Kirinia (Lepidoptera: Nymphalidae: Satyrinae). ECOLOGICA MONTENEGRINA 2015. [DOI: 10.37828/em.2019.26.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The genus Kirinia was described from the Far East and contains two species, i.e. Kirinia epimenides and Kirinia fentoni (= K. epaminondas). Later, the other four species ranging in Central and Western Asia and on the Balkan Peninsula were transferred to this genus based on morphological features of the male genitalia. This action was incorrect and is not confirmed by our novel molecular data. Here, we restore the genus Esperarge Nekrutenko, 1988 stat. rev. with four species, i.e. E. eversmanni comb. rev., E. cashmirensis comb. rev., E. roxelana comb. rev., and E. climene comb. rev. Additionally, the subspecies Esperarge eversmanni shiva syn. nov. is considered a junior synonym of E. e. unicolor.
Collapse
|
78
|
Vinarski MV, Aksenova OV, Bespalaya YV, Bolotov IN, Schniebs K, Gofarov MY, Kondakov AV. Radix dolgini: The integrative taxonomic approach supports the species status of a Siberian endemic snail (Mollusca, Gastropoda, Lymnaeidae). C R Biol 2015; 339:24-36. [PMID: 26705968 DOI: 10.1016/j.crvi.2015.11.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2015] [Revised: 11/13/2015] [Accepted: 11/14/2015] [Indexed: 10/22/2022]
Abstract
The molecular techniques are the standard tool for the study of the taxonomic position and phylogenetic affinities of the lymnaeid genus Radix Montfort, 1810, and the majority of the European representatives of this taxon have been studied in this respect. However, a plethora of nominal species of Radix described from Northern Asia (Siberia and the Russian Far East) are still characterized only morphologically, raising some doubts concerning their validity. In this paper, we present the triple (morphological, molecular, and zoogeographical) evidence that there is at least one endemic species of Radix, Radix dolgini (Gundrizer and Starobogatov, 1979), widely distributed in Siberia and Western Mongolia. Phylogenetically, it is a sister species to the European R. labiata (Rossmaessler, 1835) [=R. peregra auct.], and their common ancestor most probably lived in the Pliocene, nearly 3.25Myr ago. Our results assume the existence of an extended dispersal barrier for freshwater hydrobionts between Europe and Siberia in the Late Pliocene that may be important for biogeographical explanations. Three other nominal Siberian species of Radix: R. kurejkae (Gundrizer and Starobogatov, 1979), R. gundrizeri (Kruglov and Starobogatov, 1983), and R. ulaganica (Kruglov and Starobogatov, 1983) proved to be the junior synonyms of R. dolgini.
Collapse
|
79
|
Potapov GS, Kolosova YS, Kondakov AV. Bumblebee assemblages (Hymenoptera, Apidae) of ruderal habitats in the Kola Peninsula, NW Russia. FAUNA NORVEGICA 2015. [DOI: 10.5324/fn.v35i0.1837] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Bumblebee assemblages of ruderal habitats were studied in the Kola Peninsula in 2012. The number of species in the assemblages varies from 7 to 11. Of cryptic species Bombus sensu stricto in the Kola Peninsula only Bombus cryptarum was registered. The most abundant species in the study habitats are B. jonellus and B. cryptarum. Abundances of tundra species B. lapponicus, B. alpinus, B. balteatus are low in all localities. B. distinguendus and B. veteranus are southern immigrants in the region. Ruderal habitats in the Kola Peninsula are potentially important for bumblebee conservation.
Collapse
|
80
|
Bolotov IN, Bespalaya YV, Vikhrev IV, Aksenova OV, Aspholm PE, Gofarov MY, Klishko OK, Kolosova YS, Kondakov AV, Lyubas AA, Paltser IS, Konopleva ES, Tumpeesuwan S, Bolotov NI, Voroshilova IS. Taxonomy and distribution of freshwater pearl mussels (Unionoida: Margaritiferidae) of the Russian Far East. PLoS One 2015; 10:e0122408. [PMID: 26011762 PMCID: PMC4444039 DOI: 10.1371/journal.pone.0122408] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Accepted: 02/20/2015] [Indexed: 11/19/2022] Open
Abstract
The freshwater pearl mussel family Margaritiferidae includes 13 extant species, which are all listed by IUCN as endangered or vulnerable taxa. In this study, an extensive spatial sampling of Margaritifera spp. across the Russian Far East (Amur Basin, Kamchatka Peninsula, Kurile Archipelago and Sakhalin Island) was conducted for a revision of their taxonomy and distribution ranges. Based on their DNA sequences, shell and soft tissue morphology, three valid species were identified: Margaritifera dahurica (Middendorff, 1850), M. laevis (Haas, 1910) and M. middendorffi (Rosén, 1926). M. dahurica ranges across the Amur basin and some of the nearest river systems. M. laevis is distributed in Japan, Sakhalin Island and the Kurile Archipelago. M. middendorffi was previously considered an endemic species of the Kamchatka. However, it is widespread in the rivers of Kamchatka, Sakhalin Island, the Kurile Islands (across the Bussol Strait, which is the most significant biogeographical boundary within the archipelago), and, likely, in Japan. The Japanese species M. togakushiensis Kondo & Kobayashi, 2005 seems to be conspecific with M. middendorffi because of similar morphological patterns, small shell size (<100 mm long) and overlapped ranges, but it is in need of a separate revision. Phylogenetic analysis reveals that two NW Pacific margaritiferid species, M. laevis and M. middendorffi, formed a monophyletic 18S rDNA clade together with the North American species M. marrianae and M. falcata. The patterns that were found in these Margaritifera spp. are similar to those of freshwater fishes, indicating multiple colonizations of Eastern Asia by different mitochondrial lineages, including an ancient Beringian exchange between freshwater faunas across the Pacific.
Collapse
|
81
|
Bolotov IN, Frolov AA, Kolosova YS, Kondakov AV. The male of Sauris mouliniei (Legrand, 1971) comb. n. (Lepidoptera: Geometridae: Larentiinae: Trichopterygini), an endemic Inner Seychelles moth. Zootaxa 2014; 3765:397-400. [PMID: 24870910 DOI: 10.11646/zootaxa.3765.4.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Indexed: 11/04/2022]
|
82
|
Kondakov AV, Kobylianskiĭ AG, Tishchenkov VG, Titov VN. [The functional tests in clinical diagnostic laboratory: the detection of magnesium deficiency in the loading test]. Klin Lab Diagn 2012:16-20. [PMID: 22946219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The article deals with the value and role of functional tests in practice of clinical diagnostic laboratories. The possibilities of evaluation of biological function of homeostasis according the changes of magnesium ions or calcium concentration in urine or blood hence reflecting the deficiency of these ions in vivo. The magnesium tolerant test is described It is demonstrated that it can be applied both in curative preventive institutions and ambulatories. In the examined group of patients, 78% had physiologic parameters of magnesium concentration, 17% suffered from hypermagnesiumuria and 5%--from hypermagnesiumuria. The magnesium deficiency of different degree was detected in 87% of patients. In the most part of patients with magnesium deficiency normomagnesiumuria was detected. Only in one case with normomagnesiumuria the magnesium deficiency was absent. In 30% of patients with magnesium deficiency the concentration of cation in day urine decreased up to 2.2 times after load dose. In absence of deficiency the monotony of cation's excretion was noted. Under the magnesium deficiency the character of process changed but velocity of excretion of magnesium after load probe slightly decreased relative to values before the load. The impact of alcohol under established magnesium deficiency results in increasing of velocity of excretion of this analyte. In patient with diabetes mellitus type II six months before the diagnosis of this disease the hidden deficiency of magnesium was detected. The magnesium deficiency was not detected after the antidiabetic treatment was applied The results permit to postulate the possibility of application oral load test with magnesium to assess the impact of various stress, physical, emotional and psychological factors. The detection of magnesium deficiency permit to broad the complex treatment, to accelerate and to enhance the results of treatment of diseases. Besides, the evaluation of patient's condition according the reaction of the organism to the probe with magnesium load is an essential element of personalized medicine.
Collapse
|
83
|
Zakharov VP, Kondakov AV. [Cardiovascular system function in mitral valve prolapse in fighter pilots]. VOENNO-MEDITSINSKII ZHURNAL 1991:44-7. [PMID: 1823704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Echocardiogram examination of 250 young fighter pilots has revealed that 15 aviators had mitral valve prolapse (MVP) without symptoms of pronounced regurgitation. Their functional indexes of cardiovascular system at rest or dosed physical load at veloergometer tests were normal. Only in 3 pilots were marked rare supraventricular or ventricular extrasystoles during ECG monitoring or veloergometria. Performance capability of all pilots was sufficient. 13 pilots with MVP in examination of their tolerance to +Gz hypergravity at the levels of 6 G or more for 15 s had frequent polytop or group ventricular extrasystole. There was an ordinary aggravation of extrasystole in aviators with more deep and bilateral MVP. The article makes a conclusion that on the basis of medical flight expertise a thorough selection must be made concerning possibility of every pilot with MVP to carry out flight at high manoeuvring aircraft of new generation taking into account the gravity of prolapse and tolerance to high +Gz hypergravity more than 5 G.
Collapse
|
84
|
Suvorov PM, Bagaudinov KG, Riumin NI, Kondakov AV, Sidorova KA. [Oscillographic, rheovasographic and radioisotope research methods in the diagnosis of obliterating vascular diseases of the extremities]. VOENNO-MEDITSINSKII ZHURNAL 1988:27-9. [PMID: 3242255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
85
|
Palets BL, Popov AA, Tikhonov MA, Kondakov AV, Palets LD. [Calculation of the effectiveness of an indirect method of evaluation of +GZ tolerance using a circulation simulation model]. KOSMICHESKAIA BIOLOGIIA I AVIAKOSMICHESKAIA MEDITSINA 1988; 22:85-8. [PMID: 3226113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
86
|
Suvorov PM, Ivanchikov AP, Kondakov AV, Sidorova KA. [Hemodynamic reactions to modified orthostatic test in persons with different +Gz tolerance]. KOSMICHESKAIA BIOLOGIIA I AVIAKOSMICHESKAIA MEDITSINA 1988; 22:27-30. [PMID: 3226090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Hemodynamic responses to the passive and modified orthostatic tests were investigated in 27 low and 13 high +Gz susceptibility individuals. The modified orthostatic test included 5 min head-down tilt (-30 degrees) and head-up tilt (78 degrees) with occlusion cuffs (50 mm Hg and 100 mm Hg) applied to the upper third of the hip. Analysis of typological reactions in low and high +Gz susceptibility individuals revealed no significant differences in their tolerance to the above tests. It was found that during the 1st minute of the modified orthostatic test with 100 mm Hg pressure in the occlusion cuffs heart rate was lower and systolic blood volume was higher (p less than 0.05) than during the passive test. Differences in these parameters disappeared by the 10th minute of exposure. During the modified orthostatic test with 50 mm Hg pressure in the occlusion cuffs these parameters did not show statistically significant differences.
Collapse
|
87
|
Tikhonov MA, Arkhangel'skiĭ DI, Kondakov AV, Litovchenko VV. [Hemodynamic reactions to positive intrathoracic pressure in + Gz overload]. KOSMICHESKAIA BIOLOGIIA I AVIAKOSMICHESKAIA MEDITSINA 1983; 17:27-30. [PMID: 6358697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Eight male test subjects, aged 20-28, were exposed to acceleration +Gz and positive breathing pressure (PBP) of 30 mm Hg to study their hemodynamics under these conditions. The calculated and experimental decrease of blood pressure at the eye level during increasing acceleration and voluntary myorelaxation was comparable. The exposure to PBP helped tolerate higher (by 1.1 +/- 0.2 G) acceleration values without visual disorders. The exposure to 7.0 G and PBP caused a lower increase in heart rate and breathing frequency (by 6% and 12%, respectively), a smaller reduction of blood pressure at the eye level (by 20%), and a decreased muscular tension (by 18%).
Collapse
|
88
|
Tikhonov MA, Kondakov AV. [Effect of gravitational pulmonary atelectasis on expiratory airway closure]. BIULLETEN' EKSPERIMENTAL'NOI BIOLOGII I MEDITSINY 1981; 92:663-6. [PMID: 7326411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The effect of gravitation +Gz (2-8 Gz, 5 min) combined with air or pure oxygen breathing on the lung volume and expiratory airway closure was studied in 9 subjects. It was demonstrated that lung atelectasis induced by oxygen breathing causes restriction of lung ventilation and obstruction of the peripheral airways. The authors discuss the effect of restrictive and obstructive disorders of lung ventilation on gas exchange and development of circulatory hypoxia during acceleration.
Collapse
|
89
|
Tikhonov MA, Kondakov AV, Babushkin VI, Arkhangel'skiĭ DI, Gavriliuk DN. [Problems in the pathogenesis of respiratory disorders occurring under +Gz loads in combination with breathing of pure oxygen]. KOSMICHESKAIA BIOLOGIIA I AVIAKOSMICHESKAIA MEDITSINA 1978; 12:32-8. [PMID: 642419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The effect of accelerations of different value and duration combined with air or pure oxygen breathing on the pulmonary function was investigated in centrifugation experiments on six healthy male test subjects, aged 20--23. The dynamics of the emergence and back development of the respiratory syndrome induced by the combined effect of acceleration and pure oxygen breathing, its symptoms, spyrographic and roentgenologic components were studied. It was demonstrated that both the value and duration of acceleration played a certain role in the pathogenesis of functional disorders of the respiratory system and atelectasis; however, the time factor exerted the major effect on their development.
Collapse
|