Length- length, length -weight relationship and relative condition factor of pike, Esox lucius Linnaeus, ۱۷۵۸, in Anzali Wetland (Southwest of the Caspian Sea)

The length- length (LLRs), length-weight (LWR) relationships and relative condition factor (Kn) of ۵۰۵ specimens of pike, (Esox lucius Linnaeus, ۱۷۹۸) from Anzali Wetland, southwest of the Caspian Sea, were studied from April ۲۰۱۲ through March ۲۰۱۳. The length-length relationships among total length (TL), fork length (FL) and standard length (SL) for pike were found to be highly significant (r۲>۰.۹۸۶, P<۰.۰۰۱). The values of b in length-weight relationship in males (۳.۱۴۹۵), females (۳.۱۸۴۳) and for all specimens (۳.۲۱۳۷) indicated isometric growth. Mean relative condition factor for male, female and all specimens were ۱.۰۰۳, ۱.۰۰۴ and ۱.۰۰۸ respectively. The result of LWR could be used for fishery managers to approve appropriate regulations for sustainable fishery management. Few studies have been conducted on these parameters of pike and this is the first report on LLRs, LWR and Kn of pike from Iranian waters.

Keywords:

length , weight relationship , Condition factor , Esox lucius , Anzali Lagoon , the Caspian Sea