Length-weight and length-length relationships for four fish species from Talkhehrud River, Urmia Lake basin, Iran

Abstract

Summary Length–weight and length–length parameters were calculated in the Talkhehrud River, northwestern Iran, for four freshwater fish species belonging to two families. The b values varied between 2.27 and 3.19, with a mean ± SD of 2.2777 ± 0.387. The b parameter values in the length–weight relationship equations were determined as 2.73 for Alburnus atropatenae Berg, 1925; 3.19 for Alburnoides petrubanarescui Bogutskaya & Coad, 2009; 2.92 for Capoeta capoeta (Güldenstädt, 1773); and 2.27 for Oxynoemacheilus persa (Heckel, 1847). This study provides the first reference on the LWRs and LLRs for these species in the Talkhehrud River.

Length-weight and length-length relationships for seven fish species from the Zohreh River, Iran

“…The b values in the LWRs equations ranged from a minimum 2.53 for P. nielseni (Nalbant and Bianco, 1998) T A B L E 2 Length-length relationship parameters for seven fish species, Zohreh River, Iran differences in sample size, area/season, habitat, population, gonad maturity, sex, diet, stomach fullness, health, preservation techniques and locality, as well as differences in the observed length range (Froese, 2006;Hasankhani et al, 2014;Keivany & Zamani-Faradonbeh, 2016;Moutopoulos & Stergiou, 2002;Tesch, 1971;Zamani-Faradonbe, Eagderi, & Ghojoghi, 2015).…”

“…The differences observed in the length–weight and length–length relationships in fishes might be affected by several factors, including differences in sample size, area/season, habitat, population, gonad maturity, sex, diet, stomach fullness, health, preservation techniques and locality, as well as differences in the observed length range (Froese, ; Hasankhani et al., ; Keivany & Zamani‐Faradonbeh, ; Moutopoulos & Stergiou, ; Tesch, ; Zamani‐Faradonbe, Eagderi, & Ghojoghi, ).…”

Length–weight relationships of six freshwater fish species from the middle section of the Yangtze River basin, China

“…These inconsistencies might be due to several technical factors, such as fish grid size, sampling methodology, and sampling device (Chen et al, 2017). In addition, the number and range of length of the sampled specimens, as well as other biological parameters such as gonad maturity, sex, health, growth phase, diet, and stomach fullness, could also have influenced the estimated values of LWRs (Hasankhani et al, 2014; Keivany & Zamani‐Faradonbeh, 2016). However, we did not consider these potentially influential factors for the nine fish species in this study.…”

Length-weight and length-length relationships for three species of Squalius (Cyprinidae; Leuciscinae) from the Caspian Sea, Namak and Tigris basins of Iran

“…Relationship between length and weight (LWR) is important index in fisheries management (Keivany & Zamani‐Faradonbeh, ). In the LWR the parameter b was expected to be in the range of 2.5–3.5 (Froese, ) or 2–4 (Tesch, ).…”