Aquaculture Studies 2017, Vol 17, Num, 4     (Pages: 375-383)

Length-Weight, Length-Length Relationships and Condition Factors of Some Fish Species in Yalıköy Stream (Ordu-Turkey)

Derya Bostancı 1 , Serdar Yedier 2 , Seda Kontaş 3 ,Gülşah Kurucu 4 , Nazmi Polat 5

1 Ordu University, Department of Molecular Biology and Genetics, Ordu, Turkey
2 Ordu University, Department of Fisheries Technology Engineering, Ordu, Turkey
3 Ondokuz Mayıs University, Department of Biology, Samsun, Turkey
DOI : 10.17693/yunusae.v17i31121.339920 Viewed : 769 - Downloaded : 425 The aim of the present study is to determine the length-weight, length-length relationships and condition factors of some fish species in Yalıköy Stream (Ordu-Turkey). All specimens were collected by nets, fishing cast nets with different mesh sizes, fishing tackle, and electro shocker between June 2013 and June 2014 in the Yalıköy stream. In present study, 8 species (Alburnus chalcoides, Barbus tauricus, Capoeta banarescui, Neogobius melanostomus, Neogobius fluviatilis, Salaria fluviatilis, Salmo labrax, Squalius cephalus) belonging to 4 families (Blennidae, Cyprinidae, Gobiidae, Salmonidae) were examined. Total length (TL), fork length (FL) and standard length (SL) of the fish samples were measured to the nearest 0.1 cm, the weight (W) of fish was recorded to the nearest the 0.1 g in there. The length-weight relationships, TL vs SL and TL vs FL relationships and condition factors were calculated for each species which caught from Yalıköy Stream. All statistical analyses were evaluated at P<0.05 significance level. The highest length-length correlation coefficient was 0.99 (B. tauricus, C. banarescui and S. cephalus) while the lowest coefficient was 0.96 (A. chalcoides). The highest length-weight correlation coefficient was 0.97 (S. cephalus) while the lowest coefficient was 0.84 (A. chalcoides). The mean condition factors were calculated as 0.716±0.093 for A. chalcoides, 0.967±0.113 for B. tauricus, 1.069±0.113 for C. banarescui, 1.021±0.080 for N. fluviatilis and 1.197±0.095 for S. cephalus, respectively. In this study, determination of the length-weight, length-length relationships and condition factor were investigated for the first time in eight fish species from Yalıköy stream and these values were determined for the first time for five species living in this habitat. Keywords : Growth,Length-weight relationship,Length-length relationship,Condition factor,Yalıköy stream