Bayat Göleti (Ankara, Türkiye)’nde Yaşayan İsrail Sazanı (Carassius gibelio, Bloch 1782) Üzerine Morfometrik Bir Değerlendirme: Boy-Ağırlık İlişkisi, Kondisyon Faktörü ve Boy-Boy Dönüşümleri Üzerine Bulgular

This study aims to investigate the biometric characteristics of the invasive cyprinid Carassius gibelio (Prussian carp) inhabiting Bayat Pond, a lentic freshwater body located in Ankara Province, Turkey. A total of 45 individuals were sampled during the spring of 2017 and analyzed for length–weight relationships (LWR), condition factor (K), and length–length relationships (LLRs). The LWR equation was calculated as W = 0.011·TL³.²¹⁴ (R² = 0.973), with the exponent b significantly differing from 3 (p < 0.05), indicating positive allometric growth. The 95 % confidence interval for the growth exponent lay between 3.051 and 3.377. An average condition factor of 2.27 ± 0.26 points to a population in generally sound health. When set against more than thirty published data sets from both still- and running-water habitats, the Bayat Pond b and K values fall comfortably within the broad spectrum reported for the species—evidence of its pronounced phenotypic flexibility and capacity to adjust to local conditions. Strong linear fits among total, fork and standard lengths (all R² > 0.96) further enable robust conversion between length metrics. Taken together, these results supply a valuable baseline for tracking the ecology of C. gibelio in Turkish inland waters and support informed management of this invasive cyprinid.