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.

scholarly journals Length-weight relationship and relative condition factor of pearl oyster, Pinctada fucata martensii, cultured in the Tieshangang Bay of the Beibu Gulf, Guangxi Province, China

2020 ◽  
Vol 4 (1) ◽  
pp. 24-27
Author(s):  
Leong-Seng Leong-Seng Lim ◽  
Kit-Shing Liew ◽  
Tzuen-Kiat Yap ◽  
Nai-Han Tan ◽  
Cheng-Kai Shi
Keyword(s):  
Water Pollution ◽  
General Health ◽  
Condition Factor ◽  
Shell Height ◽  
Pearl Oyster ◽  
Pinctada Fucata ◽  
Beibu Gulf ◽  
Allometric Growth ◽  
Weight Relationship ◽  
Relative Condition Factor

Tieshangang Bay in the Beibu Gulf, Guangxi of China, is a strategic location for pearl farming. Although water pollution has been reported in this bay but the general health of the pearl oyster, Pinctada fucata martensii, farmed there has never been assessed. The present study examined the condition of P. fucata martensii farmed in the Tieshangang Bay by analyzing its length-weight relationship (LWR) and relative condition factor (RCF). A total of 111 specimens were sampled for measuring their shell height and total weight for determining the LWR and RCF. The coefficient of correlation of the LWR was high (R2 = 0.93), significant at 0.01 level. Negative allometric growth (b = 2.7048) was observed. However, P. fucata martensii achieved the expected growth in terms of weight, as determined through the RCF (mean 1.13). Negative allometric growth is commonly reported on the wild Pinctada spp. collected from different regions. Apparently, the water pollution in the Tieshangang Bay did not compromise the general health of the pearl oyster cultured there. Nevertheless, further study on the farm’s surrounding water quality and plankton availability is necessary to investigate the interaction between the growth of the oyster and its culture environment. In conclusion, the P. fucata martensii farmed in the Tieshangang Bay was considered healthy and the bay is still suitable for pearl oyster farming.

scholarly journals Length-weight Relationship, Condition Factor and Feeding Habits of Synodontis clarias (Linnaeus, 1758) in the Lower River Benue at Makurdi, Nigeria

2015 ◽  
Vol 6 ◽  
pp. 59-67
Author(s):  
P M Akombo ◽  
E T Akange ◽  
B O Amali ◽  
J N Shima
Keyword(s):  
Growth Pattern ◽  
Condition Factor ◽  
Size Range ◽  
Regression Coefficient ◽  
Feeding Habits ◽  
Allometric Growth ◽  
Food Items ◽  
Weight Relationship ◽  
Wide Range ◽  
The Mean

The Length-Weight Relationship (LWR), Condition factor (K) and feeding habits of Synodontis clarias (Linnaeus, 1758) were investigated over a 24 month period from January, 2009 - December, 2010. A total number of 163 specimens comprising of 74 females and 89 males with the size range of 7.60 – 20.00cm and the mean of 12.72± 0.258cm were investigated. The weight ranged from 13.12 – 607.30g with the mean of 65.83± 0.897g. The LWRs for the females, males and combined sexes had the r values of 0. 8415, 0.9463 and 0.8703 respectively. The mean condition factor K was 3.3667, 2.6868 and 2.9954 for the females, males and combined sexes respectively. The regression coefficient b was 1.9408, 1.8799 and 2.1359 for the females, males and combined sexes respectively indicating negative allometric growth pattern for the species. Out of the 163 stomachs examined for food items, 88 (53.99%) were empty while 75 (46.01%) contained a wide range and varying quantities of food items indicating that S.clarias in River Benue is omnivorous.

scholarly journals Comparative length-weight relationship and condition factor of hilsa shad Tenualosa ilisha (Hamilton, 1822) from freshwater, estuarine and marine environments in India

2018 ◽  
Vol 65 ◽  
Author(s):  
Sangeeta Mandal ◽  
Kuldeep K. Lal ◽  
Rajeev K. Singh ◽  
Rama Shanker Sah ◽  
J. K. Jena ◽  
...  
Keyword(s):  
Condition Factor ◽  
Well Being ◽  
Coefficient Of Determination ◽  
Allometric Growth ◽  
Relative Condition Factor ◽  
Mean Size ◽  
Commercially Important ◽  
Different Populations ◽  
Tenualosa Ilisha ◽  
Pooled Samples

The hilsa shad <em>Tenualosa ilisha</em> (Hamilton, 1822), is a commercially important and highly relished food fish. This paper presents the length-weight relationships (LWR) and condition factor of hilsa, throughout its geographical distribution in India. A total of 910 samples of <em>T. ilisha</em>, comprising 404 males and 288 females collected from various locations of east and west coasts of India were used for analyses. Heterogeneity in the LWR of males, females and pooled population was noticed. The regression coefficient (b) ranged from 2.07-3.68 for pooled, 0.75-3.03 for males and 1.78-2.97 for females. The coefficient of determination (R2) varied between 0.72-0.98 in pooled, 0.73-0.94 in males and 0.76-0.97 in females. Fulton’s condition factor (K) ranged from 0.47-3.05 in pooled, 0.47-1.63 in male and from 0.77-3.05 in female samples whereas relative condition factor (Kn) varied from 0.48-2.51 in pooled population, from 0.47-1.56 in males and 0.76-2.33 in females. Mean Fulton’s condition factor (K) ranged from 0.7-1.33 in pooled population, 0.92-1.28 in males and from 0.95-1.39 in females whereas the mean relative condition factor (Kn) varied between 0.98-1.04 in pooled population, 0.98-1.04 in males and 0.98-1.03 in females. These parameters (b, K, Kn) have been found useful in evaluating the well-being of different populations of this species. Most of the populations under study showed concordance to ideal value of b, thereby indicating isometric growth. However, significant negative allometric growth was observed for pooled samples from Padma, Hoogly and males from Padma and significant positive allometric growth was observed in the pooled samples collected from Hoogly. Comparative study of recent data with the decadal old data (1999-2000) revealed differences in mean size of the fish. This study also indicates overexploitation of the species in the recent years, which might be due to intensive fishing efforts.

scholarly journals Length-weight relationship and condition factor of bombay duck Harpadon nehereus from landings of fishery ghat, Chittagong

2016 ◽  
Vol 3 (2) ◽  
pp. 355-360
Author(s):  
Tasnuba Hasin
Keyword(s):  
Standard Length ◽  
Feeding Rate ◽  
Condition Factor ◽  
Mesh Size ◽  
Allometric Growth ◽  
Weight Relationship ◽  
Total Length ◽  
Relative Condition Factor ◽  
Bombay Duck ◽  
Harpadon Nehereus

The current study describes the length-weight relationships and condition factor of Bombay duck, Harpadon nehereus from landings of Fishery Ghat, Chittagong. A total of 300 individuals caught by various mesh size of gill nets by commercial fishers were investigated from April 2016 to June 2016. On the basis of hypothetical cube law W=aLb, the variance of ‘b’ for both total length and standard length were estimated statistically (0.0090 and 0.0088 respectively). Using the value of t=1.96 at the 95% confidence limits for ‘b’ were estimated as 2.218 to 2.590 for total length-weight relationship and for standard length-weight relationship, 1.985 to 2.353 which indicated allometric growth pattern for both cases. The monthly relative condition factor during three months of observation (0.978, 1.033, and 1.097) showed no notable difference due to spawning strain, spent condition and lower feeding rate right after peak spawning season.Res. Agric., Livest. Fish.3(2): 355-360, August 2016

scholarly journals Relative condition factor, length-weight relationship and sex ratio of copper mahseer, Neolissochilus hexagonolepis (McClelland, 1839) from Tamor River, Nepal

Our Nature ◽  
2018 ◽  
Vol 16 (1) ◽  
pp. 27-34
Author(s):  
Suren Subba ◽  
Bharat Raj Subba ◽  
Vinod Kumar Mahaseth
Keyword(s):  
Sex Ratio ◽  
Condition Factor ◽  
Well Being ◽  
Mean Value ◽  
Sudden Increase ◽  
Weight Relationship ◽  
Relative Condition Factor ◽  
Length Range ◽  
Size Groups ◽  
First Time

The present investigation was carried out for establishing the length weight relationship and to enumerate the relative condition factor and the sex ratio of Neolissochilus hexagonolepis from Tamor River, Nepal. Altogether 198 fishes were investigated from December 2014 till the end of November 2016. The sex ratio of the fish was found to be in the ratio of 1:1.2 with female dominating the catch for most parts of the year. Analysis of t-test showed a highly significant relationship (p˂0.05) between length and weight for male, female and sexes pooled. The fish was found to show isometric growth pattern with exponential value (b) equal to 2.962 for sexes pooled. The mean value of Fulton's condition factor (K) for sexes pooled was found to be 1.29 ± 0.49 giving the indication that the general well being of the fish was good. Sudden increase in the value of relative condition factor (Kn) in the size group 30-33 cm in male and 42-45 cm in female indicated their length range during which they showed the sign of maturation for the first time. Steep fall in the value of 'Kn' in size groups 33-36 cm onwards in male and 45-48 cm in female indicated their length range at spent phase.

scholarly journals Length-weight Relationship, Growth Pattern and Condition Factor of the Silver Catfish Chrysichthys nigrodigitatus (Lacepède, 1803) from Lower River Benue, Nigeria

2018 ◽  
pp. 1-8
Author(s):  
Edem, Edem Thomas ◽  
Ofunama, Preye ◽  
Eyo, Victor `Oscar
Keyword(s):  
Population Dynamics ◽  
Growth Pattern ◽  
Sustainable Management ◽  
Condition Factor ◽  
B Value ◽  
Health Condition ◽  
Artisanal Fisheries ◽  
Allometric Growth ◽  
Silver Catfish ◽  
Weight Relationship

This study was carried out to evaluate the length-weight relationship, growth pattern and condition factor of the Silver catfish Chrysichthys nigrodigitatus from the Lower River Benue Makurdi, Nigeria. A total of 200 freshly caught specimens of C. nigrodigitatus were collected between July 2013 and September 2013 from the catches of the artisanal fisheries at landing points in Wadata Market, Makurdi. Results obtained showed that the “b” value for the males was 1.6067 while that of the females was 1.6791 and combined sexes 1.7371, indicating a negative allometric growth for this species. Correlation coefficient (r) obtained for males (0.9651), 0.9517 (females) and 0.9329 (pooled sexes) showed a positive significant relationship between length and weight of C. nigrodigitatus. Monthly mean condition factor (K), indicate that C. nigrodigitatus were in good physiological health condition. In conclusion, the baseline data on the length-weight relationship, condition factor of C. nigrodigitatus from the lower River Benue provided in this study is crucial in the sustainable management of this species in the River. Also, these findings will be useful in evaluating the population dynamics, stock and the aquaculture potential of C. nigrodigitatus for future purpose.

scholarly journals Length-weight relationship and condition factor of tropical sand goby, Acentrogobius caninus (Valenciennes 1837) from Pabean Bay, West Java, Indonesia

2021 ◽  
Vol 322 ◽  
pp. 01021
Author(s):  
Lenny S. Syafei
Keyword(s):  
Growth Pattern ◽  
Condition Factor ◽  
Sand Goby ◽  
West Java ◽  
Weight Relationship ◽  
Relative Condition Factor

This study aims to determine the length-weight relationship (LWR) and evaluate the condition factors of the tropical sand goby, Acentrogobius caninus (Valenciennes 1837), in Pabean Bay West Java, Indonesia. The sampling was carried out once a month from January to December 2015, and during that period, 152 samples were collected. The LWR is W = 9 x 10-6 L-3.0356. The growth pattern of tropical sand goby is isometric (b=3). The monthly relative condition factor ranged from 0.798 to 1.322 (average: 1.028).

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.

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