A preliminar overview of species composition and geographical distribution of Malvinian weevils (Insecta: Coleoptera: Curculionidae)

Zootaxa ◽  
2008 ◽  
Vol 1704 (1) ◽  
pp. 1 ◽  
Author(s):  
PAULA POSADAS
Keyword(s):  
South America ◽  
Species Composition ◽  
Tierra Del Fuego ◽  
Integrative Approach ◽  
Generic Level ◽  
Distributional Information ◽  
Sea Level Variations ◽  
Islas Malvinas ◽  
High Degree ◽  
Very High

The objective of this paper is to provide an integrative approach to species composition and distributional information on the weevil fauna of Islas Malvinas (Falkland Islands). A total of 22 species belonging to 11 Curculionidae genera are recorded for the archipelago. Four of these genera belong to Entiminae (i.e., Caneorhinus, Cylydrorhinus, Malvinius, and Morronia) and the remaining seven belong to Cyclominae (i.e., Antarctobius, Falklandiellus, Falklandius, Germainiellus; Haversiella, Lanteriella, and Puranius). The Malvinian weevil fauna could be considered as an impoverished version of that from Tierra del Fuego at the generic level, but with a very high degree of species level endemism. The Malvinian weevil fauna exhibits a great linkage to that from southernmost South America. It has been postulated that the evolution of Malvinian weevil fauna responded to several geodispersal and subsequent vicariant events which determined the archipelago´s alternative connections and disconnections from southern South America. These events were due to sea-level variations induced by glacial-eustatic agents during Tertiary and Quaternary times. Finally, synonymic lists are provided for each species known to occur on the islands. Also, distributional data for each species are mapped and keys and illustrations are presented to identify weevil taxa recorded for the Islas Malvinas.

Species composition and geographic distribution of Fuegian Curculionidae (Coleoptera: Curculionoidea)

Zootaxa ◽  
2012 ◽  
Vol 3303 (1) ◽  
pp. 1 ◽  
Author(s):  
PAULA POSADAS
Keyword(s):  
South America ◽  
Species Composition ◽  
Geographic Distribution ◽  
Taxonomic Composition ◽  
Tierra Del Fuego ◽  
Integrative Approach ◽  
Southern South America ◽  
Identification Keys

The objective of this paper is to provide an integrative approach to taxonomic composition and distributional informationon the weevil fauna (Coleoptera: Curculionoidea) of the Tierra del Fuego archipelago. A total of 39 species belonging to17 Curculionidae genera are recorded for the archipelago. Most of these belong to two subfamilies: Entiminae (13 speciesin four genera) and Cyclominae (23 species in 11 genera). Caneorhinus gravidus (Burmeister) is here established as a newjunior synonym of Caneorhinus lineatus (Blanchard). The Fuegian weevil fauna is considered to represent an impover-ished condition in comparison to that from continental southern South America. The Tierra del Fuego archipelago has noendemic genera of Curculionidae and only three species seem to be endemic to it (Antarctobius rugirostris Champion,Cylydrorhinus lateralis [Berg], and Cylydrorhinus fulvipes [Guérin-Méneville]). However, these three species have scarcerecords and more information is required to confirm their status as Fuegian endemics. No species present in Tierra delFuego extend their distribution beyond the Andean subregion. The Fuegian weevil fauna exhibits a great linkages to thatfrom continental southernmost South America. Synonymic lists and distributional maps are provided for each speciesknown to occur on the islands. Identification keys and photographs of weevil taxa recorded for Tierra del Fuego are also presented.

scholarly journals Species composition and distribution of decapod crustaceans in the waters off Patagonia and Tierra del Fuego, South America

1999 ◽  
Vol 63 (S1) ◽  
pp. 303-314 ◽  
Author(s):  
Wolf E. Arntz ◽  
Matthias Gorny ◽  
Raul Soto ◽  
Marco A. Lardies ◽  
Marco Retamal ◽  
...  
Keyword(s):  
South America ◽  
Species Composition ◽  
Tierra Del Fuego ◽  
Decapod Crustaceans ◽  
Species Composition And Distribution

scholarly journals Regionalizacja produkcji zwierzęcej na świecie

2018 ◽  
Vol 18(33) (3) ◽  
pp. 272-281
Author(s):  
Tomasz Rokicki ◽  
Magdalena Golonko ◽  
Aleksandra Perkowska
Keyword(s):  
North America ◽  
South America ◽  
Economic Crisis ◽  
Egg Production ◽  
Animal Production ◽  
High Concentration ◽  
Animal Products ◽  
The World ◽  
High Degree ◽  
Very High

The aim of the study was to assess the regionalization of animal production in the world and the changes that have occurred in this respect. The article presents the value of animal production in regions of the world defined by the continents. The source of the material was data from FAOSTAT. The period of research covered the years 2007-2016. The value of world animal production has steadily increased. Only at the time of the economic crisis in 2009 and in 2014-2015 were declines seen in all areas. There was a high concentration of animal production that was concentrated in Asia and Europe. There was a gradual relocation of production from Europe and North America to Asia and South America. These regularities have been confirmed also in the analysis of individual groups of animal products like meat, milk and eggs. At the same time, there was a very high concentration and a high degree of variation in animal production in the regions. Disproportions increased faster in meat and egg production than in milk production.

scholarly journals Regionalizacja rolnictwa na świecie

2017 ◽  
Vol 17(32) (3) ◽  
pp. 239-248 ◽  
Author(s):  
Tomasz Rokicki ◽  
Magdalena Golonko ◽  
Aleksandra Perkowska
Keyword(s):  
North America ◽  
South America ◽  
Agricultural Production ◽  
Food Products ◽  
Agricultural Products ◽  
High Concentration ◽  
Animal Products ◽  
The World ◽  
High Degree ◽  
Very High

The aim of the study was to assess the regionalization of agricultural production around the world and the changes that have occurred in this respect. The article presents the value of agricultural production in regions of the world defined by the continents. The source of the material was data from FAOSTAT. The period of research covered the years 2007-2014. The value of world agricultural production has steadily increased. Only at the time of the economic crisis in 2009 and in 2014 were declines seen in all areas other than Asia. There was a high concentration of agricultural production in Asia and Europe. There was a gradual relocation of production from Europe and North America to Asia and South America. These regularities have been confirmed also in the analysis of individual groups of agricultural products like cereals and animal products. At the same time, there was a very high concentration and a high degree of variation in agricultural production in the regions. Disproportions increased faster in food products than non-food products produced in agriculture.

Electron Microscopy in Molecular Biology

1967 ◽  
Vol 25 ◽  
pp. 2-3
Author(s):  
Cecil E. Hall
Keyword(s):  
Electron Microscopy ◽  
Molecular Biology ◽  
Noise Level ◽  
Molecular Structures ◽  
Material Structure ◽  
The Arts ◽  
Shadow Casting ◽  
Electron Image ◽  
High Degree ◽  
Very High

The visualization of organic macromolecules such as proteins, nucleic acids, viruses and virus components has reached its high degree of effectiveness owing to refinements and reliability of instruments and to the invention of methods for enhancing the structure of these materials within the electron image. The latter techniques have been most important because what can be seen depends upon the molecular and atomic character of the object as modified which is rarely evident in the pristine material. Structure may thus be displayed by the arts of positive and negative staining, shadow casting, replication and other techniques. Enhancement of contrast, which delineates bounds of isolated macromolecules has been effected progressively over the years as illustrated in Figs. 1, 2, 3 and 4 by these methods. We now look to the future wondering what other visions are waiting to be seen. The instrument designers will need to exact from the arts of fabrication the performance that theory has prescribed as well as methods for phase and interference contrast with explorations of the potentialities of very high and very low voltages. Chemistry must play an increasingly important part in future progress by providing specific stain molecules of high visibility, substrates of vanishing “noise” level and means for preservation of molecular structures that usually exist in a solvated condition.

A Low-Noise, High-Gain Quasi-Millimeter-Wave Receiver MMIC with a Very High Degree of Integration Using 3D-MMIC Technology

2011 ◽  
Vol E94-C (10) ◽  
pp. 1548-1556 ◽  
Author(s):  
Takana KAHO ◽  
Yo YAMAGUCHI ◽  
Kazuhiro UEHARA ◽  
Kiyomichi ARAKI
Keyword(s):  
Millimeter Wave ◽  
High Gain ◽  
Low Noise ◽  
High Degree ◽  
Very High ◽  
Millimeter Wave Receiver

INTERDISCIPLINARY LINKS, INTEGRATIVE APPROACH,HEURISTIC METHODS AND ARTIFICIAL INTELLIGENCE IN THE MANAGEMENT OF INNOVATION - PART 1

2018 ◽  
Vol 28 (5) ◽  
pp. 1527-1532
Author(s):  
Hristo Patev
Keyword(s):  
Artificial Intelligence ◽  
Production Systems ◽  
Innovation Management ◽  
Integrative Approach ◽  
Heuristic Methods ◽  
Organizational Renewal ◽  
Innovation Activities ◽  
Management Of Innovation ◽  
Inventive Activity ◽  
High Degree

In this first work, out of the total of twenty-four, are considered: Integrative approach, interdisciplinary relations and transnational language in the technical and economic fundament of engineering and management, for the purpose of competitive innovation and successful business. Approaches to develop the innovation with a high degree of complexity. Interactive heuristic methods and algorithms for inventive activity, for inspiring and developing new industrial products and services for households and production systems. Implementing an effective business vocabulary for organizational renewal. Introduction of gaming and "art" methods in innovation management. Intensifying innovation activities through an attempt to introduce artificial intelligence into teamwork, with simultaneous implementation of an engineering and non-engineering approach.

Los curculionoidea (Insecta: coleoptera) de la Tierra del Fuego e Islas Malvinas

2002 ◽  
Author(s):  
◽  
Paula Elena Posadas
Keyword(s):  
Tierra Del Fuego ◽  
Siglo Xix ◽  
América Del Sur ◽  
Islas Malvinas ◽  
Siglo Xx

En 1964 el botánico franco-italiano Léon Croizat visualizó a la diversidad biológica como un hecho histórico que transcurre en tres dimensiones: forma espacio y tiempo. En este contexto, la diversidad biológica se comprende como el resultado de la historia de la vida sobre la Tierra, expresada en los cambios de forma a través del tiempo. Esta visión de Croizat ha sido el tema unificador de la biología comparada. Dentro de ella, dos disciplinas vinculadas, la biogeografía y la sistemática, enfatizan respectivamente los conceptos de espacio y forma. Ambas son fundamentales para abordar el estudio de la biodiversidad desde un enfoque integral. Consecuentemente, el objetivo principal de este trabajo de tesis es estudiar en forma integral la curculiofauna de los archipiélagos de Islas Malvinas y Tierra del Fuego. Los Curculionoidea (comúnmente denominados “gorgojos”) constituyen la superfamilia más diversa de seres vivos, con más de 57.000 especies agrupadas en 6000 géneros. Su distribución actual se extiende desde el Ártico hasta las regiones subantárticas, y sus representantes se encuentran en todos los continentes e islas, excepto la Antártida. Los estudios sistemáticos de la curculiofauna sudamericana llevados a cabo durante el siglo XIX por autores como Blanchard, Fairmaire, Germain, Guérin-Méneville y Philippi entre otros, resultaron en la descripción de numerosos géneros y especies. Durante el siglo XX la curculiofauna patagónica fue estudiada por diversos autores (e.g., Bruch, Champion, Elgueta, Enderlein, Hustache, Kuschel, Marvaldi, Morrone) con relación a sus aspectos sistemáticos no filogenéticos. Hacia fines del siglo XX aparecieron numerosas contribuciones al conocimiento de la filogenia de los curculiónidos patagónicos, en especial dentro de las Cyclominae (Curculionoidea: Curculionidae). Esta subfamilia junto con Entiminae comprenden más del 60% de las especies de la curculiofauna de América del Sur austral. En cuanto a los curculionoideos de los archipiélagos de Tierra del Fuego e Islas Malvinas en particular, sólo se han realizado inventarios parciales.

scholarly journals Vegetation Diversity of Screes and Taluses of The Pamir and South-Western Tian Shan in Middle Asia

2021 ◽  
Author(s):  
Arkadiusz Nowak ◽  
Sebastian Świerszcz ◽  
Sylwia Nowak ◽  
Marcin Nobis
Keyword(s):  
Species Composition ◽  
Arid Zone ◽  
Field Studies ◽  
Vegetation Diversity ◽  
Plant Associations ◽  
Middle Asia ◽  
Recent Developments ◽  
Phytosociological Relevés ◽  
High Degree ◽  
Tian Shan

AbstractThis paper presents the results of phytosociological research on scree vegetation of the Pamir and south-western Tian Shan. We collected 222 phytosociological relevés during field studies conducted in 2015–2019, applying the Braun-Blanquet approach. We identified 21 plant communities on mobile and stabilized screes of colluvial cones, aprons and fans, inhabiting mainly the montane and alpine belts in several ranges (e.g. Peter the First, Alichur, Shugnan, Shachdarian, Darvaz, Rushan, Vanch, Fergana, Kyrgyz and Terskey ranges). As a result we provide the first comprehensive hierarchical syntaxonomic synopsis of scree communities at montane and alpine elevations in the eastern Middle Asia. The collected vegetation relevés represent the majority of the variation among the phytocoenoses of gravel, pebble, cobble and rock block slides and screes in the montane and alpine belts. As a result of field studies and Twinspan analyses, nine associations were identified on screes of the Pamir and western Tian Shan. All these communities were assigned to the Sileno brahuicae-Lactucetalia orientalis Nowak et al. 2021. Additionally, within the nitrophilous compact gravel screes one subassociation of Corydalidetum kashgaricae trigonelletosum gontscharovii was distinguished. In the most arid zone two additional plant associations and one subassociation were identified in gravelly semi-deserts zone. The main factors determining the species composition of the studied associations are scree mobility, rock particle size, elevation above sea level and slope inclination. Our research revealed considerable diversity of scree habitats of montane and alpine belts what might be astonishing regarding harsh environment of this mountainous territory. However, a great number of lineages that evolved here and particularly rich species pool of this habitat in Middle Asia facilitate remarkable diversity among vegetation of taluses and screes. The distinctiveness of species composition is additionally enhanced by high degree of endemism of chasmophytic habitats in the eastern part of Middle Asia. Despite recent developments, the prominent chasmophytic vegetation of Middle Asia still needs thorough studies focused on its relationship to semi-desert, tall-forb and petrophytic communities of high mountains of the Pamir, Hindu-Kush, Kunlun and Central Tian Shan.

scholarly journals Multi-Locus Selection and the Structure of Variation at the white Gene of Drosophila melanogaster

Genetics ◽  
1996 ◽  
Vol 144 (2) ◽  
pp. 635-645 ◽  
Author(s):  
David A Kirby ◽  
Wolfgang Stephan
Keyword(s):  
Drosophila Melanogaster ◽  
White Gene ◽  
Transcriptional Unit ◽  
North American Population ◽  
Evolutionary Mechanisms ◽  
Locus Selection ◽  
Neutral Equilibrium ◽  
History Of ◽  
High Degree ◽  
Very High

Abstract We surveyed sequence variation and divergence for the entire 5972-bp transcriptional unit of the white gene in 15 lines of Drosophila melanogaster and one line of D. simulans. We found a very high degree of haplotypic structuring for the polymorphisms in the 3′ half of the gene, as opposed to the polymorphisms in the 5′ half. To determine the evolutionary mechanisms responsible for this pattern, we sequenced a 1612-bp segment of the white gene from an additional 33 lines of D. melanogaster from a European and a North American population. This 1612-bp segment encompasses an 834bp region of the white gene in which the polymorphisms form high frequency haplotypes that cannot be explained by a neutral equilibrium model of molecular evolution. The small number of recombinants in the 834bp region suggests epistatic selection as the cause of the haplotypic structuring, while an investigation of nucleotide diversity supports a directional selection hypothesis. A multi-locus selection model that combines features from both-hypotheses and takes the recent history of D. melanogaster into account may be the best explanation for these data.

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