Spatial Variations in The Length-Weight Relationship and Relative Condition Factor of The Introduced Freshwater Crayfish, Procambarus clarkii, (Girard, 1852) from the River Nile and Its Tributaries, Egypt

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).

Download Full-text

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

Borneo Journal of Marine Science and Aquaculture (BJoMSA) ◽

10.51200/bjomsa.v4i1.2048 ◽

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.

Download Full-text

Length-weight relationship and condition factor of Tade gray mullet, Chelon planiceps (Valenciennes, 1836) from Hooghly-Matlah Estuary, West Bengal, India

Journal of Fisheries ◽

10.17017/jfish.v5i1.2017.209 ◽

2017 ◽

Vol 5 (1) ◽

Author(s):

Soumendra Pramanick ◽

Sudhir Kumar Das ◽

Dibakar Bhakta ◽

Canciyal Johnson

Keyword(s):

West Bengal ◽

Condition Factor ◽

B Value ◽

Size Group ◽

Estuarine System ◽

Weight Relationship ◽

Relative Condition Factor ◽

Biological Management ◽

First Maturity ◽

Size At First Maturity

Tade gray mullet (Chelon planiceps) forms a lucrative fishery in the Hooghly-Matlah estuarine system. During eight months of investigation 232 specimens were examined to study length-weight relationship and relative condition factor (Kn). The length and weight of fish was varied from 41 to 283 mm and 0.81 to 208 g respectively. Two length-weight relationship equations were obtained from the analysis, W=0.0000397L2.952 for <187 mm size group and W=0.0000406L2.834 for >187 mm size group. The size at first maturity was recorded as 187 mm. The b value was not significantly different from 3 indicating isometric growth. The monthly mean Kn for the male and female were 1.041–1.125 and 1.009–1.236 respectively. The highest Kn value was recorded in July for both the sexes, which may be due to advance maturity stages. The present study will be useful in the context of biological management of mullet fishery as well as to find out aqua-farming potential of Tade gray mullet.

Download Full-text

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

Nigerian Journal of Animal Production ◽

10.51791/njap.v38i1.665 ◽

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.

Download Full-text

Preliminary Report on the Size-specific Variation in Length-weight Relationship, Relative Condition Factor, and Gonad Maturation of Bigeye Scad Selar crumenopthalmus (Bloch, 1793) in the northern Sulu Sea, Philippines

Journal of Environment & Aquatic Resources ◽

10.48031/msunjear.2020.05.01 ◽

2020 ◽

Vol 5 ◽

Author(s):

Kaent Immanuel Uba ◽

Keyword(s):

Preliminary Report ◽

Condition Factor ◽

Gonad Maturation ◽

Sulu Sea ◽

Weight Relationship ◽

Relative Condition Factor ◽

Specific Variation

Download Full-text

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

Indonesian Fisheries Research Journal ◽

10.15578/ifrj.22.2.2016.77-84 ◽

2017 ◽

Vol 22 (2) ◽

pp. 77 ◽

Cited By ~ 2

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.

Download Full-text