scholarly journals Length-weight, length-length relationships and condition factor of obtuse barracuda Sphyraena obtusata Cuvier, 1829 (Pisces: Perciformes) from Vizhinjam coast, Kerala, India

2021 ◽  
Vol 68 (1) ◽  
Author(s):  
R. Shaila Prasad ◽  
B. Santhosh ◽  
Kurian Mathew Abraham ◽  
S. Jasmine ◽  
S. Surya ◽  
...  
Keyword(s):  
Standard Length ◽  
Condition Factor ◽  
Sex Differentiation ◽  
Linear Regression Analysis ◽  
Principal Component ◽  
Female Population ◽  
Weight Relationship ◽  
Length Relationship ◽  
Linear Relationships ◽  
Relationship Of

Eleven morphometric variables including weight were recorded for 429 specimens of obtuse barracuda Sphyraena obtusata Cuvier, 1829 collected over a period of two years from January 2017 to December 2018, from Vizhinjam fish landing centre, Thiruvananthapuram, Kerala. Length-weight relationship and length-length relationship of the species were estimated using linear regression analysis. Different length measurements were converted to ratios with standard length as morphometric ratios and the growth rate was assessed gender wise. Length-weight relationship for male and female population were estimated as Wm= 13.326 × L3.2409 and Wf = 11.952 × L2.9821, respectively. Linear relationships for other morphometric variables and morphometric ratios with standard length were established for the species. Principal component analysis was performed and total length, snout length and snout to pre-nostril length were identified as key morphometric variables discriminating gender. The relative condition factor was estimated as 1.04+0.13 for total population and the role of morphometric ratios in sex differentiation was examined.

scholarly journals ESTIMATION OF YELLOWFIN TUNA PRODUCTION LANDED IN BENOA PORT WITH WEIGHT-WEIGHT, LENGTH-WEIGHT RELATIONSHIPS AND CONDITION FACTOR APPROACHES

2017 ◽  
Vol 22 (2) ◽  
pp. 77 ◽  
Author(s):  
Irwan Jatmiko ◽  
Hety Hartaty ◽  
Budi Nugraha
Keyword(s):  
Condition Factor ◽  
Linear Regression Analysis ◽  
Fork Length ◽  
Yellowfin Tuna ◽  
Weight Relationship ◽  
Relative Condition Factor ◽  
Linear Relationships ◽  
Length Increase ◽  
Landing Sites ◽  
The Relationship

Yellowfin tuna (Thunnus albacares) is one of the important catch for the fishing industry in Indonesia. Length-weight relationship study is one of important tools to support fisheries management. However it could not be done to yellowfin tuna landed in Benoa port since they are in the form of gilled-gutted condition. The objectives of this study are to determine the relationship between gilled-gutted weight (GW) and whole weight (WW), to calculate length weight relationship between fork length (FL) and estimated whole weight (WW) and to assess the relative condition factor (Kn) of yellowfin tuna in Eastern Indian Ocean. Data were collected from three landing sites i.e. Malang, East Java; Benoa, Bali and Kupang, East Nusa Tenggara from January 2013 to February 2014. Linear regression analysis applied to test the significance baseline between weight-weight relationships and log transformed length weight relationship. Relative condition factor (Kn) used to identify fish condition among length groups and months. The results showed a significant positive linear relationships between whole weight (WW) and gilled-gutted weight (GW) of T. albacares (p<0.001). There was a significant positive linier relationships between log transformed fork length and log transformed whole weight of T. albacares (p<0.001). Relative condition factor (Kn) showed declining pattern along with length increase and varied among months. The findings from this study provide data for management of yellowfin tuna stock and population.

scholarly journals Length-weight relationship and condition factor of Bangana dero (Hamilton, 1822) (Actinopterygii: Cypriniformes: Cyprinidae) from northeastern region of India

2018 ◽  
Vol 10 (7) ◽  
pp. 11863
Author(s):  
Kamlesh Kumar Yadav ◽  
Rani Dhanze
Keyword(s):  
Standard Length ◽  
Condition Factor ◽  
River System ◽  
Well Being ◽  
Allometric Growth ◽  
Weight Relationship ◽  
Total Length ◽  
A Value ◽  
Length Relationship ◽  
Unit Increase

Assessment of length-weight relationship (LWR), length-length relationship (LLR) and condition factor was carried out for Bangana dero in northeastern India, mainly from the Brahmaputra and Irrawaddy (Manipur) River system.  We report a value of ‘b’ 3.1269 and 3.1426 for LWR with respect to total length and standard length respectively, indicating positive allometric growth. The value of ‘b’ for LLR is less than one, which indicates that growth in total length is less with per unit increase in standard length.  The value of ‘K’ and ‘Kn’ is 0.91 and 0.72 depicts normal well being of fish in its habitat. 

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 Cirrhinus Cirrhosus inhabiting Indus River, Sindh-Pakistan

2021 ◽  
Vol 1 (1) ◽  
pp. 028-033
Author(s):  
Kashaf Malik ◽  
Sumeera Malik ◽  
Dilawer Bhambhro ◽  
Maryam Sheikh ◽  
Shehla Malik ◽  
...  
Keyword(s):  
Strong Correlation ◽  
Sustainable Management ◽  
Fishery Management ◽  
Condition Factor ◽  
Maximum Length ◽  
Indus River ◽  
Maximum Weight ◽  
Weight Relationship ◽  
River Indus ◽  
Relationship Of

The present work reports the length–weight relationships (LWR) and condition factor and of Cirrhinus cirrhosus inhabiting in River Indus, Sindh-Pakistan. The Length-weight relationship is an important tool for fishery management. A total of 340 specimens (individual) of length–weight were measured. A maximum length of the groups was observed 20.7cm and minimum as 9.4cm. The maximum weight was recorded about 84gm and minimum as 6gm. The estimated values of length-weight relationship and condition factor were calculated by formula LeCren (1951), as Kn=0.547, and Fulton as K=0.724. Length-weight was found with a strong correlation of n= 3.101, C=0.0176 with r2=0.894. The results of this work would be beneficial for sustainable management as well as fishery managers.

scholarly journals Length-weight relationship and condition factor of endemic fish Bilih (Mystacoleucus padangensis Blkr.) in Lake Singkarak, West Sumatra, Indonesia

2021 ◽  
Vol 322 ◽  
pp. 01036
Author(s):  
Syahroma H. Nasution ◽  
Ira Akhdiana ◽  
M. Suhaemi Syawal ◽  
Agus Nurhidyat
Keyword(s):  
Condition Factor ◽  
Economic Value ◽  
Normal Range ◽  
Female Fish ◽  
High Demand ◽  
Male And Female ◽  
Weight Relationship ◽  
West Sumatra ◽  
Males And Females ◽  
Relationship Of

Bilih (Mystacoleucus padangensis) is an endemic species of Lake Singkarak and has important economic value. Overfishing of Bilih fish using non-selective fishing gear has led to a decline in its population. High demand, resulting in decreased production and size of Bilih fish. This research aims to determine this endemic fish's length-weight relationship and condition factor as basic data to the effort conservation. The fish was captured with experimental gillnet mesh sized 5/8, ¾, and 1 inch in Sumani, Batu Taba, Paninggahan, and PLTA intake stations. The total length and the weight of Bilih fish ranged from 40 – 95 mm and 10 – 74 mg, respectively. The highest length and weight of Bilih were 80.3 mm, and 45.0 mg were found at the Sumani station. The growth pattern of male and female fish was a negative allometric characteristic. The length-weight relationship of male and female fish was W = 0.00137 L2.368 and W = 0.00179 L2.312, respectively. Condition factors of males and females are 1.02 and 1.004, respectively. The result of condition factor value for males is higher than the female. The water quality values are within the normal range that supports fish life.

scholarly journals Length-weight Relationship of Heterobranchus bidorsalis (Geoffroy st. Hilaire 1809) Diploid and Triploid Progenies raised under the same Environmental condition

2021 ◽  
Vol 38 (1) ◽  
pp. 160-166
Author(s):  
O. T. Agbebi ◽  
S. O. Otubusin ◽  
S. O. Olufeagba
Keyword(s):  
Regression Analysis ◽  
Condition Factor ◽  
Environmental Condition ◽  
Weight Relationship ◽  
Total Length ◽  
Relative Condition Factor ◽  
Adaptive Environment ◽  
Factor Evaluation ◽  
Relationship Of

Twenty specimens of triploid with weight and length ranging from 207-300g and 29-32cm; diploid 150-200g and 23-28cm Heterobranchus bidorsalis (Geoffroy St. Hilaire 1809) were subjected to morphometric and meristic characterization, length-weight relationship and condition factor evaluation. Triploid specimens had the higher values in all the parameters examined and were significantly different (P<0.005). Regression analysis of diploid and triploid show the ranges of values (K) of 0.802 1.453 and 0.838 0.906 respectively, for condition factor (k) while the relative condition factor values (Kn) ranged between 0.869 1.087 and 0.968 1.038 respectively. Weight increases directly as the total length increases for both diploid and triploid indicating isometric growth. The R2 in triploid was higher (96.8%) than in diploids (42.4%). In diploid progenies, the length by weight was significantly different (P<0.05) in triploid. Triploid progenies need no special adaptive environment or technique for rearing. Therefore, diploid and triploid progenies can be successfully cultured simultaneously under the same environmental condition.

Economic Development and Education of the Female Population

1985 ◽  
Vol 28 (3) ◽  
pp. 361-384 ◽  
Author(s):  
Shirley Nuss ◽  
Lorraine Majka
Keyword(s):  
Economic Development ◽  
Educational Attainment ◽  
Empirical Relationship ◽  
Female Education ◽  
Female Population ◽  
Linear Relationships ◽  
The World ◽  
Education Of Women ◽  
Relationship Of ◽  
Positive Effect

This article examines the empirical relationship of GNP/capita as an indicator of economic development and the education of women. Several indicators of female participation in first-, second-, and third-level education are used for 162 countries and territories of the world. The findings suggest that economic development has a positive effect on female education for many countries. Quadratic relationships explain significantly more of the variance than linear relationships for median educational attainment, student enrollment ratios at the second level, and the proportional participation of females in third-level education. Cubic relationships explain significantly more of the variance than either quadratic or linear relationships for economic development and first-level education and the proportional participation of females as graduates from third-level education in the field of education. Economic development is a weak predictor of the integration of females as third-level graduates in the important fields of engineering and agriculture.

scholarly journals Studi Populasi Ikan Beloso (Oxyurichthys microlepis) Di Perairan Morosari Kec. Sayung, Demak

2020 ◽  
Vol 4 (1) ◽  
pp. 29-39
Author(s):  
Dian Sari Maisaroh ◽  
Sri Rejeki ◽  
Muhammad Zainuri
Keyword(s):  
Data Analysis ◽  
Standard Length ◽  
Condition Factor ◽  
Von Bertalanffy ◽  
Fish Condition ◽  
Food Energy ◽  
Weight Relationship ◽  
A Value ◽  
Study Population ◽  
Food And Feeding

This study aims to study population of beloso fish. The research was conducted between May-June 2010 at Morosari Waters Area, District SayungDemak. Beloso fish catches are measured standard length, total length and weight. The data analysis suchgrowth was using Von Bertalanffy, length - weight relationship, conditional factor and, food and feeding habits.Growthof beloso fish(O. microlepis) in Morosari waters area has a value of  L ∞ of 13,49cm by the equation L(t) = 13,49 ( 1 - exp 0,0175 (t-1,9053)) for length,while based on the weight obtained for W ∞ 128,33 grams with the equation W(t) = 128,33 ( 1 - exp -0,003 (t-2,4312))3. Length-weight relationship beloso fish have value of b1,451 in the Morosari waters area. This value indicates that the growth of beloso fish is negative allometric, which the addition of lengthis faster than its weight. Based on data calculations of beloso fish condition factor in the Morosari waters shows the range of condition factors from 0,0965 to 0,3661, which are preferred food energy accretion term. Beloso fish areomnivorous fish that consume phytoplankton, zooplankton, and detritus as food found in the Morosari estuary.

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