Reproductive characteristics of Siahmahi, Capoeta damascina (family: Cyprinidae) in Beheshtabad river, Tigris basin

Abstract

A total of 426 specimens of Mesopotamian barb (Siahmahi) Capoeta damascina (Cyprinidae) were caught by gillnets (1-6 cm mesh sizes) from Beheshtabad River, Chaharmahal and Bakhtiari Province from May 2013 to June 2014. Fish specimens were anesthetized in 1% clove oil solution, fixed in 10% buffered formalin and transported to the laboratory for further analyses. Fork lengths of the sampled fish ranged from 8.94 cm to 42.45 (23.32±6.53SD) cm and total weight from 10.3 to 1255.5 (242.5±213.4) g. Based on scale readings, the maximum age was found to be 7 + years for males and 8 + for females. Six reproductive characteristics, viz: sex ratio, Gonadosomatic Index (GSI), Hepatosomatic Index (HSI), relative fecundity, absolute fecundity and ova diameter were determined. The smallest mature male and female were 11.2 and 18.5 cm in fork length respectively. Sex ratio was 1M:0.7F. The GSI showed that spawning occurred from March to June. Oocyte diameters ranged from 0.57 to 2.48 (1.30±0.41) mm. Absolute fecundity ranged between 2260 and 51770 (15360±12030) eggs. Absolute fecundity and fish size (fork length and total weight) were highly correlated. Relative fecundity varied from 11 to 65 (33±12) eggs per gram of total body weight. The average hepatosomatic index was 2.25 ± 0.05 and the highest value was observed in March (3.05 ± 0.31).

Reproductive Biology of Abu Mullet, Planiliza abu (Heckel, 1843), in Karun River, Southwestern Iran

“…After identifying the various stages of sexual maturation, diameter of sex cells was measured during different growth phases under magnifications of 40× by a scaled ocular micrometer. The stage of gonad maturity was determined visually following Brown-Peterson et al (2011) which is widely used in different works (e.g., Abaszadeh et al, 2013;Hamzeh et al, 2017;Siami et al 2017;Keivany et al, 2018a;Ghafouri et al, 2019). Reproductive seasonality was determined by examination of the monthly changes in the gonadosomatic index.…”

Age and growth of large scale scraper (Capoeta aculeata) in the Gizehrud River, Tigris basin

“…The large scale barb or scraper, Capoeta aculeata (Valenciennes, 1844), is widely distributed in such Iranian river basins as the Tigris (the Karun and the Karkheh Rivers), Fars, Isfahan, Kavir, Kerman and the Namak (Keivany et al 2016;Esmaeili et al 2017). There are several studies on biology of C. damascina (Khalaf 1987;Fishelson et al 1996;Abdoli and Mostafavi 2009;Gharache 2008;Asadollah et al 2011Asadollah et al , 2017Siami et al 2017), C. fusca (Patimar and Mohamadzadeh 2010), C. trutta (Poria et al 2014a, b), C. capoeta (Abdoli et al 2008;Patimar et al 2009) and C. coadi (Keivany and Siami 2020). Although Capoeta aculeata is consumed by locals, its biology is not well documented, because of its low density and lack of commercial importance.…”