Length-weight relationship and condition factor of seven fish species of Totkabon River (southern Caspian Sea basin), Guilan, Iran (original) (raw)
Related papers
2015
Length-weight (LWR), length-length (LLR) relationships and condition factor (K) were calculated for three fish species of Taleghan River (Alborz Province, Iran). In total 113 fish specimens were collected by electrofishing, anesthetized in 1% clove solution in the field and immediately their weights and lengths measured, finally all samples returned to river. The values of the parameter slope ('b') in the length-weight relationship were 2.966 for Barbus ciry, 2.96 for Capoeta gracilis and 3.053 for Oxynoemacheilus bergianus. The all relationships between TL, FL and SL were linear (for all cases: r 2 > 0.98). Also, the coefficient 'K' in the condition factor equation were calculated 0.898 for B. ciry, 0.833 for C. gracilis and 0.830 for O. bergianus.
Journal of Wildlife and Biodiversity, 2020
This study evaluated Length-Weight Relationships (LWRs) and condition factor (K) of the juvenile and young adult fish from shallow littoral zones in some aquatic ecosystems located in Khuzestan province, Iran. In June 2015, the specimens were sampled using a seine net from the Shadegan Wetland, the Dez, and the Karkheh Rivers in the time period of increased juvenile recruitment. The LWRs of fish were calculated using linear regression log formula as log W=loga+blogTL, and the K estimated using K=W/L3. A total of 18 species belong to 5 families collected in the stations. Exotic species comprised 33.33% of the total ichthyofauna. The variation of b-value ranges between 2.65 and 3.26, and the growth pattern is isometric in all species except Acanthobrama marmid. Since the amount of K was higher than one in all species, it can be concluded that the sampling stations are favorable for the growth of the fish. As a consequence of the decreased floodplain habitats in the surrounding of the water bodies, the shallow waters of littoral zones that have suitable features for the juvenile fish can play an essential role in the survival of the native fish fauna.
2021
In this study, the length-weight relationships (LWRs) and condition factor (K) were estimated for 1334 specimens belonging to ten species including Acanthobrama marmid, A. microlepis, A. urmianus, Romanogobio persus, Leuciscus aspius, Luciobarbus capito, L. mursa, L. caspius, Alburnus atropatenae and Petroleuciscus ulanus from the Caspian Sea, Urmia Lake and Persian Gulf basins of Iran. The total length and weight of the individuals varied from 3.4 to 84.5 cm and 0.4 to 6600 g respectively. The values of the slope parameter (b) and condition factor ranged from 2.99 – 3.38 and 0.79 – 1.25 respectively. LWRs with high correlation coefficients were calculated for all species (R > 0.95). Based on the results, the allometric growth pattern of the studied species were positive except for L. aspius, L. capito, L. mursa and P. ulanus. This study provides useful data regarding the LWRs and condition factor of ten fish species in Iranian inland waters that can be used in fisheries manageme...
Iranian Journal of Ichthyology, 2015
This research was conducted to study the length-weight and length-length relationships and condition factor of six cyprinid fish species viz. Alburnus atropatena , Barbus lacerta , Capoeta capoeta , Carrasius gibelio , Romanogobio macropterus and Pseudorasbora parva from Zarrineh River (Urmia Lake basin, Iran). A total of 188 specimens ranging from 2.9 to 21.4cm in total length and 0.22 to 176g in total weight were collected. Based on the results, the values of b varied between 2.59 for C. capoeta , to 3.26 for A. atropatenae . All length-weight relationships were significant (P 0.98). All linear regressions were highly significant (P<0.05). The result of this study may be useful for biologists and fishery managers.
This research was conducted to study the length-weight and length-length relationships and condition factor of six cyprinid fish species viz. Alburnus atropatena, Barbus lacerta, Capoeta capoeta, Carrasius gibelio, Romanogobio macropterus and Pseudorasbora parva from Zarrineh River (Urmia Lake basin, Iran). A total of 188 specimens ranging from 2.9 to 21.4cm in total length and 0.22 to 176g in total weight were collected. Based on the results, the values of b varied between 2.59 for C. capoeta, to 3.26 for A. atropatenae. All length-weight relationships were significant (P<0.001), with r2 greater than 0.88. The condition factor were found to be between 0.075±0.244 for C. capoeta to 1.021±0.143 for C. gibelio. The length-length relations between total length, fork length, and standard length for the six fish species were highly significant (r2>0.98). All linear regressions were highly significant (P<0.05).
2016
This study described some biological parameters, including length-weight, length-length relationships and Fulton’s condition factor (K) of Aphanius marassantensis , Capoeta tinca , Carassius auratus , Carassius gibelio , Cyprinus carpio , Oxynoemacheilus angorae and Squalius cf. cephalus from the Nevsehir Province (Kizilirmak River Basin), based on 1222 specimens collected from May to September, 2014. The length-weight relationships were estimated as follows W=0.0193L 2.987 , W=0.165L 2.839 , W=0.0345*L 2.731 , W=0.023*L 2.856 , W=0.0097*L 3.138 , W=0.0078*L 3.102 and W=0.014*L 2.962 , respectively as given above. The mean K values were calculated as 1.96±0.29, 1.67±0.20, 3.48±0.42, 2.23±0.46, 0.99±0.24, 0.79±0.11 and 1.41±0.21, respectively at the same order. Additionally, the relationships among total length, fork length and standard length were also estimated for these species. The length-length relationships were highly correlated (r 2 >0.98) and significant (P<0.05).
Journal of Applied Sciences Research
The aim of this study is to record the length-weight relationship, relative condition factor (Krel) and relative weight (Wr) for three fish species in Iranian coastal waters of the Caspian Sea. Fish sampling was carried out in the beach seine fishing grounds in autumn and winter seasons for two years (2007 and 2009). 14104 specimens were measured and weighed. The values of the exponent b in the length-weight relationships (LWRs) were 2.8449 for Cyprinus carpio, 2.8844 for Liza aurata and 2.9077 for Rutilus frisii kutum. Relative condition factor (Krel) values were ranged from 1.017±0.002 to 1.071±0.002. In addition, Relative weight (Wr) ranged from 0.929±0.002 to 1.740±0.004.
AFRICAN JOURNAL OF BIOTECHNOLOGY, 2011
The aim of this study was to record the length-weight relationship parameters and condition factors for some commercially important fish of Bushehr coastal waters of Persian Gulf. The length-weight relationships were calculated for five species caught during fishing surveys using different types of fishing gears (trawls, pots and gill net with different mesh size) during April 2008 to December 2010. The b value ranged between 2.733 for Argyrops spinifer and 3.03 for Epinephelus coioides. The coefficient of determination (r 2) was very significant for all the species. Relative weight had significant differences (Kruskal-Wallis test, P<0.001) with best performance by E. coioides. This results show that this range size of specimens in these populations apparently do not reach and surpass 100% of mean weight. In this study, length-weight relationships and condition factors are reported for the first time for A. spinifer, Pomadasys kaakan and Lutjanus malabaricus from the Persian Gulf and for Lethrinus nebulosus and Lutjanus malabaricus ruber which has not been previously recorded in the Iranian waters.
International Journal of Agriculture Sciences, 2011
This study describes the length-weight relationships (LWR) and condition factors of six fish species from six families of ecological and economic importance, found in Atbara River and Khashm el-Girba reservoir. A total of 1118 specimens were caught by using various mesh size of gill nets from January, 2007 to December, 2007. The growth coefficient (b) values obtained for the six fish species ranged between 2.278 for Clarias lazera and 3.680 for Bagrus bayad and differed significantly (p<0.005) from 3, which indicates that most of the fish species (61.1%) have negative allometric growth. The condition factors (K) of the fish species ranged from (0.506±0.416) in Clarias lazera to (3.415±0.707) in Oreochromis niloticus and about 83.3% of these condition factors fall outside the range recommended as suitable for matured fresh water fish species in the tropics.
Length weight Relationships of Freshwater Fish Species in Kerian River Basin and Pedu Lake
2010
"The length-weight relationships of 12 freshwater fish species collected using various mesh size of gill nets and cast nets from Kerian River basin in Perak and Pedu Lake in Kedah were estimated. Devario regina, Rasbora sumatrana, Puntius binotatus, Labiobarbus lineatus, Cyclocheilichthys apogon and Crossocheilus oblongus were caught from the Kerian River and its tributaries. Meanwhile in the Pedu Lake, there were Puntius schwanenfeldii, Notopterus notopterus, Chela sp., Mystacoleucus marginatus, Osteochilus microcephalus, and Puntius gonionotus. Fish total length (TL) and standard length (SL) and weight were recorded. The values of constants a and b were determined from the length and weight data which transform into the linear equation of lnW=lna+blnL. These parameters were then fitted to the parabolic equation, W=aL . The length-weight relationships o b f fish from both areas were significantly different at P<0.001 and the growth exponents, b, for the fishes varied from 2.665 to 4.106. The values show that most of the fishes collected from the Kerian River basin were of positive allometric growth, while the fishes from the Pedu Lake were of negative allometric forms. Based on their scores of growth exponents, the fishes were grouped into light (b<3.0), heavy (b>3.0) or isometric (b=3) indicating poor, over and symmetric growths of length and weight respectively. Crossocheilus. oblongus (b=2.8854) in the Kerian River basin belonged to the light group as well as Chela sp. (b=2.6653), M. marginatus (b=2.7046) and P. schwanenfeldii (b=2.8635) from the Pedu Lake. The heavy group from the Kerian River basin were L. lineatus (b=2.9906), D. regina (b=3.3001), C. apogon (b=3.5162), R. sumatrana (b=3.6101) and P. binotatus (b=4.1063). Meanwhile, in the Pedu Lake, this group of fish included O. microcephalus (b=3.0541), P. gonionotus (b=3.2340) and N. notopterus (b=3.2500). The condition factor of D. regina reflecting its well being and degree of fatness, was compared in four Kerian River tributaries using the mean relative condition factor (Kn). Sungai Ijok provided a much better habitat for the fish with a Kn score of 1.2089±0.1882 followed by Sungai Mahang (1.0472±0.1671), Sungai Kangar (1.0212± 0.2295) and Sungai Selama (0.9105±0.1986). The fish habitat in Sungai Ijok was significantly different from those of Sungai Mahang and Sungai Selama and the habitats at the two latter rivers were statistically different from each other at P<0.05. The values of a, b and Kn varied with age and sex of the fish, wet and dry seasons, environmental conditions and water bodies as observed in the lotic and lentic environments of the Kerian River basin and Pedu Lake respectively."