TY - JOUR ID - 5721 TI - Feeding indices of Planiliza abu (Heckel, 1843) in Karun River, Southwestern Iran JO - Caspian Journal of Environmental Sciences JA - CJES LA - en SN - 1735-3033 AU - Jorfipour, Miaad AU - Keivany, Yazdan AU - Paykan-Heyrati, Fatemeh AU - Ghafoori, Zaniar AD - Department of Natural Resources, Isfahan University of Technology, Isfahan, Iran AD - Department of Fisheries, Faculty of Natural Resources, University of Tehran, Karaj Campus, Iran Y1 - 2022 PY - 2022 VL - 20 IS - 4 SP - 693 EP - 700 KW - Condition factor KW - Gastrosomatic index KW - Relative length of gut KW - Vacuity index DO - 10.22124/cjes.2022.5721 N2 - The feeding characteristics of Planiliza abu in Karun River, Khuzestan Province, southwestern Iran were studied by collecting 460 specimens from November 2016 to September 2017. The specimens were anesthetized in 1% clove oil, fixed in 10% buffered formalin and transferred to the laboratory. The average length and weight of all specimens were 13.18 ± 1.35 cm and 31.05 ± 9.22 g, respectively. The average condition factor for both males and female was 1.34, exhibiting no significant differences in different months in both sexes (p > 0.05). The mean relative length of gut in all fish was 2.27 ± 0.36 during the year.  The highest gastrosomatic index (GSI) value was in September (12.07), while the lowest in February and March displaying significant differences in different months (p < 0.05). A total of 214 empty stomachs were found amongst the 460 fish samples and there were no significant differences in the ratio of empty stomachs in different months (p > 0.05). Therefore, based on the visual observations, RLG and GSI, it could be concluded that this species is an omnivorous fish (mainly aquatic insects and plants, algae, diatoms, and detritus) with a modest feeding throughout the year. UR - https://cjes.guilan.ac.ir/article_5721.html L1 - https://cjes.guilan.ac.ir/article_5721_00e8c09edc4696bfcd75b61f6b1da069.pdf ER -