Age and growth of a newly described barb,Capoeta coadi(Cyprinidae), in Beheshtabad River, Tigris basin

Abstract

The Coad barb, Capoeta coadi Alwan, Zareian and Esmaeili, 2016, is a newly described endemic fish in Beheshtabad River, Tigris basin of Iran and little is known about its life-history. Life history characteristics were examined in 426 specimens collected monthly from Beheshtabad River (central Iran) during May 2013 to May 2014. The sex ratio was 1M:0.7F. Based on scale and opercular readings, the maximum ages of the population were 8+ years for females and 7+ for males. The most frequent age groups were 3+ and 4+ in males and females, respectively. Size varied from 8.94 to 42.95 cm in fork length and weight between 10.3 and 1255.5 g. Length–weight relationship implied that the growth was negatively allometric for both sexes. The von Bertalanffy growth model was estimated as Lt =35.97[1‑e‑0.205( t+0.586)] and Lt = 49.31[1‑e ‑0.162( t‑0.208)] for males and females, respectively. The growth performance index was estimated as 5.58 and 5.97 for males and females, respectively, indicating a faster growth rate for females.

Estimating length-weight, length-length relationships, and condition factor of eight fish species, a case study of Bashar River, Tigris drainage (Iran)

“…For example, the b-value for A. sellal reported to be 2.95 (Zare-Shahraki et al, 2020), Zamani-Faradonbe et al ( 2018) reported a b-value of 3.11 for G. gymnothorax in Iranian basins, almost similar to our results i.e., 3.11. In Beheshtabad River (Tigris basin, Iran) bvalue for C. coadi had been reported to be 2.91 (Keivany and Siami, 2020) and Zare-Shahraki et al ( 2020) reported a bvalue of 2.97 for B. karunensis from the Karun River system, southwestern Iran. The reported LWR parameters for C. regium in different rivers of Iran ranged from 3 to 3.21 which was higher than those of the current study (Table 4).…”

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

“…In the Zayandehrud River, the maximum age of the same fish species (a female with a fork length of 49 cm and weight of 1935 g) recorded by Asadollah et al (2011Asadollah et al ( , 2017 was 10 + , and by Kheyrandish et al (2014) 5 + years. The maximum age reported for the congeneric species C. coadi is 8 + years (Keivany and Siami 2020), and that for C. capoeta is 5 + (Abdoli and Mostafavi 2009) (Table 5). Growth variation could be due to the adaptation to environmental changes (Nikolsky 1963).…”

“…In other areas, this ratio in C. damascina was found to be in favour of females (Mazaheri 2007;Soofiani and Asadollah 2010;Asadollah et al 2011). Differences in the sex ratio might be predetermined by the interspecific differences in abilities of fish to adapt to different ecological conditions, differences in the date and time of capture, in the fishing gear used, in location, differences in growth rates and mortalities between males and females, migration of mature fish from the region and differences in behavioral patterns of male and female fish (Qasim 1966;Pitcher and Hart 1982;Fishelson et al 1996;Keivany and Soofiani 2004;Soofiani et al 2006;Asadollah et al 2011;Keivany et al 2012;Abaszadeh et al 2013;Ghanbarzadeh et al 2014Ghanbarzadeh et al , 2017Keivany and Daneshvar 2015;Kiani et al 2016;Keivany and Siami 2020).…”

“…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.…”