Wild Salmo trutta labrax from the Bıçkı Stream in the Marmara Region: Gamete Quality and First Reproduction Under Aquaculture Conditions

• Published in: Aquatic sciences and engineering : (Online) Vol. 36; no. 2; pp. 95 - 100
• Main Authors: MEMİŞ, DEVRİM, TUNÇELLİ, GÖKHAN, YAMANER, GÜNEŞ
• Format: Journal Article
• Language: English
• Published: İstanbul Üniversitesi Yayınları 01.01.2021; Istanbul University Press
• Subjects: Biyoloji; egg quality; fertilization; Mühendislik; sperm quality; wild trout; İstanbul; Türkiye; Wild trout; egg quality; fertilization; sperm quality; first spawning
• ISSN: 2602-473X; 2602-473X
• DOI: 10.26650/ASE2020702855

In this study, the quality and reproductive success of wild Black Sea Trout (Salmo trutta labrax) were investigated. In total 32 wild trout (27.3±13.6 g and 13.9±2.3 cm) from the Bıçkı Stream in Kocaeli Province in the Marmara Region were kept in circular fiberglass outdoor flow-through tanks (1.5m ø) at the mean water temperature of 11.8±4.5 °C. In November 2016, when the water temperature was 8.4 °C, the first spawning of wild trout occurred. Sperm volume (ml), Motility (%) and VCL (μm/ sec) values were determined to be 7.5±2.5, 70.42±0.83 and 70.35±3.98, respectively. The weight (g), total fecundity and egg diameter (mm) values of female fish were listed to be 513.75±78, 1.171±171, and 3.84±0.02, respectively. In the experiment, 5.859 wild Black sea trout eggs were fertilized. The eyed-egg stage occurred 24 days (288 day-degree) post fertilization and the survival rate from fertilization to the eyed-stage was 28%. Wild Black Sea trout larvae from P1 (Paternal Generation) hatched 48 days after fertilization with the hatching rate of 7%.