Length‐weight relationship of 12 species of freshwater fish caught in the middle and lower stretches of the Negro River basin, Brazilian Amazon

2021 ◽  
Author(s):  
Chiara C. F. Lubich ◽  
Daniel Olentino ◽  
Carlos E. C. Freitas ◽  
Kedma C. Yamamoto
Keyword(s):  
Freshwater Fish ◽  
River Basin ◽  
Brazilian Amazon ◽  
Weight Relationship ◽  
Negro River ◽  
Relationship Of

Length‐weight relationship of six small fish species from the Negro River basin in the Brazilian Amazon

2021 ◽  
Author(s):  
Daniel Olentino ◽  
Chiara C. F. Lubich ◽  
Markus S. Leal ◽  
Kedma C. Yamamoto
Keyword(s):  
River Basin ◽  
Fish Species ◽  
Brazilian Amazon ◽  
Small Fish ◽  
Weight Relationship ◽  
Negro River ◽  
Relationship Of

Length-weight relationship of six freshwater fish species in upper-middle Tocantins River basin (Brazil)

2018 ◽  
Vol 34 (4) ◽  
pp. 1021-1024
Author(s):  
D. C. O. Rosa ◽  
R. Bartolette ◽  
B. E. Soares ◽  
M. F. G. Brito
Keyword(s):  
Freshwater Fish ◽  
River Basin ◽  
Fish Species ◽  
Freshwater Fish Species ◽  
Weight Relationship ◽  
Tocantins River ◽  
Relationship Of

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

Length-weight relationship of 10 freshwater fish species in Amazonian streams, Trombetas River basin (Brazil)

2016 ◽  
Vol 32 (4) ◽  
pp. 749-750 ◽  
Author(s):  
D. C. O. Rosa ◽  
B. E. Soares ◽  
M. P. Albrecht ◽  
E. P. Caramaschi
Keyword(s):  
Freshwater Fish ◽  
River Basin ◽  
Fish Species ◽  
Freshwater Fish Species ◽  
Weight Relationship ◽  
Relationship Of

scholarly journals Length-Weight Relationship and Sex Ratio of Amblypharyngodon Mola in Dekar Haor of Sunamganj, Bangladesh

2018 ◽  
Vol 44 (2) ◽  
pp. 185-193
Author(s):  
PR Das ◽  
MS Uddin ◽  
MS Islam ◽  
M Biswas ◽  
MR Mia
Keyword(s):  
Sex Ratio ◽  
Freshwater Fish ◽  
Condition Factor ◽  
Correlation Coefficients ◽  
Male And Female ◽  
Positive Correlation ◽  
Average Ratio ◽  
Weight Relationship ◽  
R Value ◽  
Relationship Of

The study was carried out to determine length-weight relationship and sex ratio of a freshwater fish Amblypharyngodon mola (Hamilton 1822) collected from Dekar haor of Sunamganj district during the period of January to August 2017. A total of 2000 fishes were collected for the study and categorized these fishes into three groups namely males, females and combined sexes. Among 2000 mola 777 were male and 1223 were female. Length-weight equations and the correlation coefficients obtained for males, females and combined ones were: males Y = –1.97 + 3.00X, r = 0.883; females Y = –2.30 + 3.41X, r = 0.914 and combined Y = –2.11 + 3.16X, r = 0.904. Female’s A. mola attained more weight with the increases in length. Value of correlation coefficient ‘r’ was 0.883 for male and exhibited highly positive correlation between length and weight. On the contrary, ‘r’ value for female was 0.914 and it had also strongly positive correlation between length and weight relationships. Length-weight relationship of A. mola for male, female and combined sexes showed allometric pattern of growth. Condition factor ‘K’ for male, female and combined sexes was 1.09, 1.05 and 1.06, respectively and indicated better condition of fishes. The highest sex ratio (1 : 2.05) was found in May and the lowest (1 : 1.33) was in February. Dominance of females over males throughout the year was observed with an average ratio of male and female 1 : 1.57. Therefore, results of the study indicate that the existing hydrobiological conditions of the haor are conducive for food availability, free movement, feeding and better growth of the fish. Asiat. Soc. Bangladesh, Sci. 44(2): 185-193, December 2018

Length-weight relationship of five commercially important freshwater fish species in the Kashmir Valley, India

2016 ◽  
Vol 32 (4) ◽  
pp. 740-741 ◽  
Author(s):  
A. Bashir ◽  
N. K. Sharma ◽  
B. S. Bisht ◽  
R. Singh ◽  
J. I. Mir ◽  
...  
Keyword(s):  
Freshwater Fish ◽  
Fish Species ◽  
Kashmir Valley ◽  
Freshwater Fish Species ◽  
Weight Relationship ◽  
Commercially Important ◽  
Relationship Of

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.

Sign in / Sign up

Export Citation Format

Share Document