Growth Rate and Fecundity of Bleak (Alburnus Alburnus(L.) in the Sand-Pit Lake Chepintsi (Bulgaria)

Abstract

The population status of bleak (Alburnus alburnut (L.) in sand-pit lake Chepintsi near Sofia by using some biological factors as growth rate, condition and fecundity was investigated. The maximum age, length and body mass of bleak were 3 years, 12.7 mm and 20 g, respectively.The first, second and third age group were 5.77%, 63.46%, 30.77% respectively. The linear and body mass growth rate were described by the equations: SL=1.3487+2.6601R (r=0.88); W=0.1499L 1.8499 (r=0.95), respectively. The condition coefficient of bleak (k) was the lower than that for other populations from different water bodies. Also the populations from different water basins were compared by the body mass at the same length. Fecundity was 7 168 eggs, the average was 1 707 -12 284 eggs. The fecundity-length and fecundity-weight relationship were described by the equations: F=387.32L+4365.7 (r = 0.46); F=1368.4W-3151.9 (r = 0.59) respectively.

Biology and ecology of the accidentally introduced bleak, Alburnus alburnus (Actinopterygii: Cypriniformes: Cyprinidae), in Keddara Dam Lake, Algeria

“…In our study, the sex ratio was in favour of the females and this is consistent with the data observed by other authors (Raikova-Petrova et al 2009, Georgiev et al 2015, Erdoğan and Torcu Koç 2017. This numeric dominance was attributed, according to and Zaugg (unpublished ** ), to the rapid growth and early maturity of the females and higher mortality of the males.…”

“…In this study, the value of b in the length-weight relation was higher than 3, indicating that the weight increases faster than size. The b value, obtained at Keddara Dam Lake was higher than that obtained in Spain , in Belgium (Verreycken et al 2011), in Greece (Kleanthidis et al 1999, Koutrakis andTsikliras 2003), in France (Chappaz et al 1987, Argillier et al 2002, in Bulgaria (Raikova-Petrova et al 2009), in Poland (Kompowski 2000), and in Turkey (Erdoğan and Torcu Koç 2017). This indicates a good ponderal growth of Alburnus alburnus in Keddara Dam Lake in Algeria.…”

A review and meta-analysis of the environmental biology of bleak Alburnus alburnus in its native and introduced ranges, with reflections on its invasiveness

“…In a comparison of A. alburnus in the River Gévora and the Sierra Brava Reservoir (southwestern Spain), the proportion of smaller mature A. alburnus individuals was lower in the river than in the reservoir, and both males and females were larger and presented higher body condition and reproductive investment in the river (Almeida et al 2014). Alburnus alburnus fecundity is highly variable in both its native (Politou 1993;Baruš and Prokeš 1993;Raikova-Petrova et al 2009) and non-native ranges (Latorre et al 2018), ranging from 1,707 to 12,284 spawned eggs in native populations (Raikova-Petrova et al 2009) and from 1,829 to 8,069 eggs in non-native populations (Latorre et al 2018). Relative fecundity by size class is equally variable elsewhere in the native range, ranging in Bulgaria from 104 to 788 in Lake Chepintsi, which is almost 2.1 × higher than in the Batak Dam (Table 6).…”