scholarly journals Length-weight relationships of fish from sandy beaches

2023 ◽  
Vol 83 ◽  
Author(s):  
D. Olentino ◽  
C. C. F. Lubich ◽  
M. D. P. Rocha ◽  
J. H. N. Santos ◽  
T. Gomes ◽  
...  
Keyword(s):  
River Basin ◽  
Fish Species ◽  
Standard Length ◽  
Brazilian Amazon ◽  
Sandy Beaches ◽  
Total Weight ◽  
B Values ◽  
Negro River ◽  
Early Evening

Abstract This study estimated the length–weight relationships of 16 fish species occurring close to the shores of sandy beaches along the lower Negro River basin, Brazilian Amazon. The specimens were captured for one day each month, in October to November 2016, early in the morning and early evening, using trawl net (20 m taken for standard length (SL – 0.1 cm precision) and total weight (TW – 0.01 g precision). The parameters a and b of the equation WT = a.LTb were estimated. The a values ranged from 0.0018 to 0.0226 and b values ranged from 2.5271 to 3.3244. This study also provides new data on of maximum lengths for six species, Amazonsprattus scintilla, Brycon pesu, Moenkhausia megalops, Pachyurus paucirastrus, Reganella depressa and Trachydoras microstomus, and new reports of the LWRs parameters of 15 fish species.

scholarly journals Pinnularia caprichosa sp. nov.: a diatom from a black water Brazilian Amazon system

Phytotaxa ◽  
2015 ◽  
Vol 239 (3) ◽  
pp. 280 ◽  
Author(s):  
Andreia Cavalcante Pereira ◽  
Lezilda Carvalho Torgan ◽  
Ana Luiza Burliga ◽  
John Patrick Kociolek ◽  
Carlos E. Wetzel ◽  
...  
Keyword(s):  
New Species ◽  
River Basin ◽  
Amazon Basin ◽  
Brazilian Amazon ◽  
New Taxon ◽  
Middle Portion ◽  
Black Water ◽  
Negro River ◽  
Electron Microscopical ◽  
Scanning Electron

While possessing a remarkable diversity in the acidic and oligotrophic waters of the Amazon basin, the genus Pinnularia appears underdescribed in the region. In this study, we present light and scanning electron microscopical observations on Pinnularia caprichosa sp. nov. from Tupé Lake, a dendritic lake located on the floodplain of the Negro River basin. This new taxon has a large axial area and transapical striae that are slightly radiate to parallel and longer in the middle portion of the valve. The species was compared with Pinnularia elliptica, P. instabilis, P. lacunarum, P. montana, P. permontana and P. subflexuosa, all of which closely resemble P. caprichosa but differ from the new species in specific details of size, striae density and valve shape.

Length‐weight relationship of 16 fish species from the Negro River basin (Amazonas state, Brazil)

2020 ◽  
Author(s):  
C. C. F. Lubich ◽  
J. Aguiar‐Santos ◽  
C. E. C. Freitas ◽  
F. K. Siqueira‐Souza
Keyword(s):  
River Basin ◽  
Fish Species ◽  
Weight Relationship ◽  
Negro River ◽  
Amazonas State ◽  
Relationship Of

scholarly journals Fine root biomass in a tropical moist forest in the upper Negro River basin, Brazilian Amazon

Tropics ◽  
2014 ◽  
Vol 22 (4) ◽  
pp. 179-183
Author(s):  
Hideyuki Noguchi ◽  
Cacilda Ad^|^eacute;lia Sampaio de Souza ◽  
Rosiane Oliveira da Silva ◽  
Rempei Suwa ◽  
Takuya Kajimoto ◽  
...  
Keyword(s):  
River Basin ◽  
Root Biomass ◽  
Fine Root ◽  
Brazilian Amazon ◽  
Fine Root Biomass ◽  
Negro River ◽  
Moist Forest

Increasing incidence of malaria in the Negro River basin, Brazilian Amazon

2010 ◽  
Vol 104 (8) ◽  
pp. 556-562 ◽  
Author(s):  
A.C. Cabral ◽  
N.F. Fé ◽  
M.C. Suárez-Mutis ◽  
M.N. Bóia ◽  
F.A. Carvalho-Costa
Keyword(s):  
River Basin ◽  
Brazilian Amazon ◽  
Negro River

scholarly journals Length-weight relationships of four freshwater ornamental fish species from the Brazilian Negro River basin

2011 ◽  
Vol 28 (1) ◽  
pp. 148-149 ◽  
Author(s):  
M. Quara de Carvalho Santos ◽  
J. R. Gonzaga Lemos ◽  
C. do Nascimento Pereira ◽  
A. Teixeira de Oliveira ◽  
M. Tavares-Dias ◽  
...  
Keyword(s):  
River Basin ◽  
Fish Species ◽  
Ornamental Fish ◽  
Negro River
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