scholarly journals Length-weight relationship and condition factor of eight fish species from the upper Araguari River, State of Amapá, Brazil

2019 ◽  
Vol 41 ◽  
pp. e46666 ◽  
Author(s):  
Luiza Prestes ◽  
Marcos Sidney Brito Oliveira ◽  
Marcos Tavares-Dias ◽  
Maria Gercilia Mota Soares ◽  
Fabiana Calacina Cunha
Keyword(s):  
Fish Species ◽  
Condition Factor ◽  
First Record ◽  
The State ◽  
Coefficient Of Determination ◽  
Weight Relationship ◽  
Estimated Parameters

The present study estimated parameters of the length-weight relationship (LWR) and allometric condition factor for eight fish species from the upper Araguari River, in the State of Amapá, Brazil. A total of 615 fish of eight species were analyzed: Acestrorhynchus falcatus, A. falcirostris, Ageneiosus inermis, Hemiodus unimaculatus, Hoplias aimara, Myloplus asterias, M. ternetzi and Tometes trilobatus. The allometric condition factor varied from 0.742 to 1.435. The coefficient of allometry ranged from 2.723 to 3.225. The coefficient of determination (R2) of the LWR ranged from 0.742 to 0.985. This is the first estimate of the length-weight relationship for fish from the Araguari River and the first record of these parameters for Myloplus ternetzi and Tometes trilobatus.

scholarly journals Length-weight relationship and condition factor for twelve fish species from the Igarapé Fortaleza basin, a small tributary of the Amazonas River estuary

2020 ◽  
Vol 50 (1) ◽  
pp. 8-11 ◽  
Author(s):  
Marcos Sidney Brito OLIVEIRA ◽  
Luís Maurício Abdon SILVA ◽  
Luiza PRESTES ◽  
Marcos TAVARES-DIAS
Keyword(s):  
Fish Species ◽  
Condition Factor ◽  
River Estuary ◽  
River System ◽  
First Record ◽  
The Body ◽  
Coefficient Of Determination ◽  
Weight Relationship ◽  
Weight Data ◽  
Small Tributary

ABSTRACT Length and weight data are useful in fisheries management and standard results of fish monitoring programs. Length-weight relationship (LWR) is used for estimating the weight corresponding to a given length, and the condition factor is used to compare the body condition, fatness or health of fish populations. This study aimed to estimate the LWR and the condition factor for 12 freshwater fish species from the Igarapé Fortaleza basin, a tributary of the Amazonas River system in the State of Amapá, eastern Amazon (Brazil). The coefficient of determination, the allometric condition factor and the allometric coefficient varied among species, and were compared with populations elsewhere. In 83.3% of the species, the allometric coefficient remained within the expected range. This was the first record of LWR parameters for Acestrorhynchus falcirostris.

scholarly journals Length/weight relationship and condition factor of Macrobrachium jelskii (Miers, 1877) and M. brasiliense (Heller, 1862) (Decapoda, Palaemonidae) in two locations in the state of São Paulo

Nauplius ◽  
2017 ◽  
Vol 25 (0) ◽  
Author(s):  
Fabiano Gazzi Taddei ◽  
Daphine Ramiro Herrera ◽  
Thiago Maia Davanso ◽  
Thiago Elias da Silva ◽  
Rogério Caetano da Costa ◽  
...  
Keyword(s):  
Condition Factor ◽  
Sao Paulo ◽  
The State ◽  
São Paulo ◽  
Weight Relationship

scholarly journals FIRST RECORD OF Dolops striata (BRANCHIURA: ARGULIDAE) ON Arapaima gigas FROM A FISH FARM IN STATE OF PARÁ, BRAZIL

2018 ◽  
Vol 26 (2) ◽  
pp. 205-208
Author(s):  
Jeffson Nobre PEREIRA ◽  
Germán Augusto Murrieta MOREY ◽  
José Celso de Oliveira MALTA
Keyword(s):  
Fish Species ◽  
Body Surface ◽  
Buccal Cavity ◽  
First Record ◽  
Neotropical Region ◽  
The State ◽  
Fish Farm ◽  
Geographical Range ◽  
Arapaima Gigas ◽  
High Prevalence

Branchiurans are parasites from the buccal cavity, gills, skin, and fins of various fish species. The Neotropical region has one of the highest diversity of branchiurans. On Arapaima gigas, only four species of branchiurans have been reported. The present study improves the knowledge on host and geographical range of Dolops striata. Fish were collected from a fish farm in the State of Pará, Brazil. All A. gigas were parasitized by Dolops striata, which were collected from the fins and body surface. This is the first record of D. striata in A. gigas. The high prevalence detected warns the possibility of an increase in the number of D. striata infesting A. gigas, which may cause some problems for fish-farmers.

scholarly journals Length weight relationship and Fulton’s condition factor of Macrobrachium assamense peninsularie in Khoh tributary of Ram Ganga from Garhwal Himalaya, Uttarakhand, India

2013 ◽  
Vol 14 (3) ◽  
pp. 17-22
Author(s):  
Anita Rawat Rana ◽  
Koshal Kumar
Keyword(s):  
Condition Factor ◽  
Strong Association ◽  
Garhwal Himalaya ◽  
Coefficient Of Determination ◽  
Feeding Intensity ◽  
Male And Female ◽  
Weight Relationship ◽  
Strong Positive Relationship ◽  
The Difference ◽  
One Year

Macrobrachium assamense peninsularie length-weight relationship and Fulton’s condition factor was studied in Khoh tributary of Ram Ganga in the Garhwal Himalaya region of Uttarakhand for the period of one year from March 2009-Feb 2010. A strong positive relationship was observed between the length and weight in both the sexes (male and female) (b<3). Also when data was pooled, the growth was allometric (b<3). The values obtained from the length/weight relationship (LWR) showed that there was a high and significant correlation between the total length and weight after using the t-test for the significance of correlation.The highest correlation coefficient ‘r’ =0.94 i.e strong association between length and weight was observed. This means that as the length of the prawn increases the weight increases in the same proportion. Coefficient of determination r2 was also high (0.88) which indicated that the model used for the analysis fits the data, confirming the fitness of the model. The Fulton’s condition factor “K” was recorded highest (K = 2.0603) in March and lowest (K = 1.6195) in May in Male while in female, the condition factor (K = 2.1038) was highest in August and lowest (K = 1.5345) in October. The condition factor “K” ranges from 1.6195 to 2.0603 in male and 1.5345 to 2.1038 in female. It means the condition factor was sex and season dependent. The difference in condition factors in male and female may be attributed to the presence of ovigerous female, environmental conditions and changes in feeding intensity.

scholarly journals Morphometry, length-weight relationship and relative condition factor of red-toothed trigger fish, Odonus niger

2021 ◽  
Vol 42 (4) ◽  
pp. 1026-1032
Author(s):  
N.K. Suyani ◽  
◽  
R. Mridula ◽  
K.M. Rajesh ◽  
M.M. Meshram ◽  
...  
Keyword(s):  
Condition Factor ◽  
Coefficient Of Determination ◽  
Allometric Growth ◽  
Morphometric Measurements ◽  
Morphometric Characters ◽  
Weight Relationship ◽  
Relative Condition Factor ◽  
Wide Range ◽  
Size Groups ◽  
Combined Data

Aim: The study aimed to investigate the morphometric and meristic measurements, length-weight relationship and relative condition factor of Odonus niger landed along coastal Karnataka. Methodology: The morphometric and meristic measurements, length-weight relationship and relative condition factor (Kn) of O. niger was studied for a period of eight months from August 2019 to March 2020. The different morphometric characters were subjected to statistical analysis. The length-weight relationship was analyzed for both the sexes (female and male) and combined data. Monthly relative condition factor was analyzed for both the sexes and for different size group. Results: A comparison of different morphometric measurements exhibited good extent of correlation indicating good extent of interdependence of these characters. Four out of eight morphometric characters are environmentally controlled and suggested wide range of zoogeographical distribution of O. niger. The length-weight relationship is indicated as W = 0.046 L2.565, W = 0.044 L2.589 and W = 0.047 L2.561 with coefficient of determination (r2) of 0.910, 0.913 and 0.910 for male, female and combined sexes, respectively. The 'b' values of both the sexes (male and female) exhibited negative allometric growth (p<0.05) and appeared to be leaner. There was no significant (p<0.05) variation for relative condition factor (Kn) among the months and size groups. However, little higher values were observed during November and February. Interpretation: The study fills the knowledge gap and support for developing a suitable management system for this fish species.

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