scholarly journals Fish landings in Barcelos, in the Middle Negro River Region, Amazonas

2015 ◽  
Author(s):  
S. O. Inomata ◽  
C. E. C. Freitas
Keyword(s):  
Negro River ◽  
River Region

scholarly journals Periphytic Actinella Lewis (Ochrophyta, Bacillariophyceae) species from an Environmental Protection Area in the Brazilian Amazon

2018 ◽  
Vol 30 (0) ◽  
Author(s):  
Luís Gustavo de Castro Canani ◽  
Rebecca da Silva Fraia ◽  
Sérgio de Melo
Keyword(s):  
Light Microscopy ◽  
Environmental Protection ◽  
Brazilian Amazon ◽  
Acidic Ph ◽  
Diagnostic Features ◽  
Negro River ◽  
River Region ◽  
Environmental Protection Area ◽  
Protection Area ◽  
First Time

Abstract Aim The aim of this study is to present the Actinella species found in periphytic samples collected from an Environmental Protection Area in Santarém (PA, Brazil), to comment on their morphology by comparing them with existing records, and to increase knowledge of the distribution of the genus in Pará State. Methods Ten periphytic samples were collected from seven sampling stations in the Alter do Chão Environmental Protection Area (Santarém, Pará, Brazil) in October 2015 and February and July 2016. Dissolved oxygen, pH, conductivity and water temperature were measured in the field at sites from which samples were collected in 2016. Samples were oxidized and analyzed by light microscopy. Results The sampled water bodies presented low conductivity and an acidic pH. We identified 12 Actinella taxa, several of which had originally been described from samples collected from the Amazon in the mid-20th century, mainly in the lower Tapajós River region. Actinella rionegrensis is recorded for the first time in the State of Pará, outside of its type locality (Negro River, near Manaus, AM, Brazil), and the species habitus (wisp-shaped colonies) is recorded for the first time. Conclusion Our results indicate that the Environmental Protection Area has been effective in conserving the aquatic ecosystem, since Actinella species identified in the mid-20 th century are still present. Taxonomic issues for some species of this genus need clarification and revision, since overlapping diagnostic features occur among species and with species belonging to the genus Eunotia.

scholarly journals Voyages as exercises of the gaze

2012 ◽  
Vol 9 (2) ◽  
pp. 272-291
Author(s):  
Sylvia Caiuby Novaes
Keyword(s):  
Verbal Communication ◽  
Digital Photographs ◽  
The Gaze ◽  
Negro River ◽  
River Region ◽  
The Relationship

This article focuses the relationship between journeys and photographs especially among anthropologists who travel. Having travelled to the Upper Negro River as an advisor of a PhD student, I discuss what digital photographs may mean in a context where verbal communication is impossible. Real or imaginary journeys are a source of images, reports, or travel logs in which it is difficult to discern what is real and what is fiction. After discussing a few famous scientific and literary journeys, the article focuses on some anthropological journeys and concludes that images produced by anthropologists are a result of trained intuition, a sensitive gaze, and memories of former travels. The article includes photographic essays that incorporate pictures I took in February 2012 among the Hupd'äh, in the Upper Negro River region.

Divergent Memories of Tumen Shan-shui

2019 ◽  
pp. 229-10.33526/EJKS.20191901.229
Author(s):  
Xiaoxuan Lu
Keyword(s):  
Lived Experience ◽  
North Korea ◽  
Research Study ◽  
States Of Mind ◽  
Geographical Research ◽  
River Region ◽  
Production Techniques ◽  
Landscape Research ◽  
Border Areas ◽  
The Creation

Focusing on the interplay between memory and place, this article examines the rationale behind the use of axonometric drawings (axons) in a geographical research study of the Tumen/Tuman River region encompassing the borders shared by China, Russia and North Korea. The concepts of “memory of place” and “place of memory” guide the structure of this project and the flow of this article. “Memory of place” emphasises the lived experience of our physical senses, and helps determine the great potential of visual methodologies in the fields of geographical and landscape research and study. Drawn up using the graphic production techniques of abstracting, foregrounding, highlighting and juxtaposing, axons avail themselves of and inform both realist and idealist states of mind. In contrast, “place of memory” references a particular type of materiality and helps us understand Tumen Shan-shui as a library of memories that reveals a profusion of contested aesthetic, cultural and political meanings. Axons serve to tell narratives revealing desires, actions and undertakings that have shaped and continue to shape the substance of the memory sites in question including infrastructure, architecture and signage. Initially adopted by the author as a medium for recording and communicating due to security restrictions imposed in the border areas in question, the creation of axons generated new insights on methods of documentation in landscape research, and the places and landscapes themselves.

ESTIMATION OF THE T-YEAR SPECIFIC DISCHARGE USING THE REGIONALISED SKEWNESS COEFFICIENT OF THE LOG-PEARSON TYPE III DISTRIBUTION

2020 ◽  
Author(s):  
Jakub Mészáros ◽  
◽  
Pavol Miklánek ◽  
Pavla Pekárová ◽  
◽  
...  
Keyword(s):  
River Basin ◽  
Type Iii ◽  
River Region ◽  
Pearson Type ◽  
Skewness Coefficient ◽  
Distribution Parameters ◽  
Design Values ◽  
Specific Discharge ◽  
Morava River ◽  
Pearson Type Iii Distribution

In this paper the results are presented of estimation of T-year specific discharge of several streams in two regions in Slovakia. The Qmax time series used in the study were observed at water gauges from lowland Slovak part of the Morava River basin, and from the mountainous Belá River basin. For estimating the design values, we have studied the use of only one type of probability distribution, namely the Log-Pearson Type III Distribution (LP3 distribution). The use of only one type of distribution brings several benefits, e.g. possibility of the regionalization of the distribution parameters (in this study skew coefficient). In the first step the design values of the specific discharge series qmax (with historical data) were estimated and regional skew coefficients Gr of the LP3 distribution were computed. Regional skewness coefficient Gr was estimated to be 0.38 in the Morava River region, and 0.73 in the Belá River region. In many cases the estimate of the 1000-year specific discharge is two times higher than the value of the 100-year specific discharge. Then we have derived the empirical relations between station skew coefficient G and the elevation of the water gauge. In the second step we have derived the empirical relationships between 1000-years specific discharge q1000 and the elevation of the water gauge for both regions separately. The derived empirical regional equations can be used to estimate the 1000-years specific discharge of other streams in the region.

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