@article{article_1908595, title={Spermatological Parameters and Length–Weight Relationship of Saurida lessepsianus from the Gulf of Antalya, Mediterranean Sea}, journal={Acta Aquatica Turcica}, volume={22}, pages={1–9}, year={2026}, DOI={10.22392/actaquatr.1908595}, url={https://izlik.org/JA89HM84HX}, author={Güngör, Şükrü and Herdoğan, Mine and Mart, Feyzanur and İnanç, Muhammed Enes and İnnal, Deniz}, keywords={Invasive, Non-indigenous, Synodontidae, Spermatological parameters, Reproductive biology}, abstract={<p>Members of the family Synodontidae are demersal teleosts of ecological and commercial importance in marine ecosystems. Saurida lessepsianus, a Lessepsian lizardfish, is an established component of demersal fish assemblages in the Eastern Mediterranean. Although its distribution, growth, and general reproductive biology have been investigated, detailed spermatological information on this species has not yet been reported. This study evaluated the length–weight relationship and spermatological parameters of S. lessepsianus from the Gulf of Antalya, Mediterranean Sea. A total of 24 individuals collected during the March–April sampling period were examined for biometric measurements and length–weight relationship analysis, while spermatological parameters were evaluated in six male individuals. The length–weight relationship was calculated as W = 0.0047TL3.126, with a strong coefficient of determination (R² = 0.924), indicating positive allometric growth. The mean GSI of males was 2.64 ± 1.62. The average spermatozoon head width and tail length were 3.07 ± 0.54 µm, and 41.57 ± 14.20 µm, respectively. Spermatozoa concentration was 871.83 ± 37.65 × 10⁶ spermatozoa/ml, and flow cytometric analysis showed a viability rate of 61.76 ± 22.67%. Correlation analysis showed significant positive relationships among total length, body weight, gonad weight, and GSI, whereas spermatozoa viability and concentration were not significantly correlated with biometric or gonadosomatic parameters. To the best of our knowledge, this study provides the first detailed spermatological examination of S. lessepsianus and preliminary baseline data for future reproductive studies. </p>}, number={3}