A Study on Populations of Endangered Species, Shemaya, Chalcalburnus<br /> Chalcoides in The Haraz and Shirud Rivers.<br />
Journal Title: محيط شناسي - Year 2008, Vol 34, Issue 46
Abstract
In this study, age and growth for two populations of Shemaya, Chalcalburnus chalcoides, in Haraz and Shirud rivers were investigated in April to June 2006. 704 fish specimens were collected using a Cast- net. The maximum length and weight observed were 251 mm and 96 gr, in a 5- year old female. The most abundant age groups were 2+ and 3+ years for male and female respectively. While male of Shirud populations were heavier and longer on average in younger ages (ANCOVA, P ≤ 0.05), differences in female were not significant (ANCOVA, p≥ 0.05). Female of Haraz population had isometric growth while positive allometry was observed in the fish population of Shirud. The Von Bertalanffy growth parameters were: (Haraz population: for male and for female), (Shirud population: for male and for female). In the two populations, Female had higher L∞, while Kvalue for males were relatively higher in the two rivers.
Authors and Affiliations
Hossein Rahmani
Keywords
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