Author/Authors :
Yazıcı, Ramazan Ahi Evran Üniversitesi - Çiçekdağı Meslek Yüksekokulu - Laborant ve Veteriner Sağlık Bölümü, Turkey , Yılmaz, Savaş Ondokuz Mayıs Üniversitesi - Fen Edebiyat Fakültesi - Biyoloji Bölümü, Turkey , Yazıcıoğlu, Okan Ondokuz Mayıs Üniversitesi - Fen Edebiyat Fakültesi - Biyoloji Bölümü, Turkey , Polat, Nazmi Ondokuz Mayıs Üniversitesi - Fen Edebiyat Fakültesi - Biyoloji Bölümü, Turkey
Title Of Article :
The determination of the most reliable ageing method for the rudd (Scardinius erythrophthalmus L., 1758) population in Lake Ladik, Samsun, Turkey
Abstract :
Ages estimated from scales, vertebrae, opercles, utricular (lapillus) and lagenar (asteriscus) otoliths of 260 rudd (Scardinius erythrophthalmus L., 1758) specimens captured from Lake Ladik in February and March 2010 were compared to determine the most reliable ageing method. Three readings were made for each bony structure by one reader. Mean ages were determined for all bony structures and precision of ages obtained from multiple readings was evaluated calculating percent agreement (PA), average percent error (APE) and coefficient of variation (CV). Due to the highest PA (71.71 %) and the lowest APE (2.71 %) and CV (3.56 %) values, it was concluded that lapillus is the most reliable bony structure for age determination in Lake Ladik population of this species. When lapillus ages were compared with other bony structures, the highest precision was found between lapillus and asteriscus age readings.
NaturalLanguageKeyword :
Rudd , Age determination , Lapillus , Lake Ladik , Turkey
JournalTitle :
Ege Journal Of Fisheries and Aquatic Sciences
