ABSTRACT The pleopodal fecundity of Pontastacus leptodactylus from Hirfanlı Dam (Turkey) was investigated. Reproductive period, length at first maturity, as well as the number, weight and diameter of pleopodal eggs were determined. The study was conducted monthly at six different stations from June 2017 to May 2018. Berried females were observed between December and May. L50 length at first maturity of the female crayfish population in the lake was estimated as 9.04 cm and this value is below the applied 10 cm Minimum Landing Size (MLS). The mean egg number of the population was 240.18, the mean egg weight was 0.0122 g and the mean egg diameter was 2.702 mm. While an increase in female total length had a positive effect on mean total egg number, sampling period (progressive incubation period from December to May) caused negative effects. The mean total egg number for 1 mm total length was found to be 2.18. When the mean pleopodal egg number of the crayfish population in Hirfanlı Dam Lake was compared with populations of P. leptodactylus in other localities it was concluded that the stock is quite productive.

中文翻译：

---

窄爪小龙虾 (Pontastacus leptodactylus Eschscholtz, 1823) 的多足类繁殖力

摘要 研究了来自 Hirfanlı Dam（土耳其）的 Pontastacus leptodactylus 的多足繁殖力。测定繁殖期、初熟长度以及尾足卵的数量、重量和直径。该研究于 2017 年 6 月至 2018 年 5 月在六个不同的站点每月进行一次。 12 月至 5 月期间观察到浆果雌性。湖中雌性小龙虾种群首次成熟时的 L50 长度估计为 9.04 厘米，该值低于应用的 10 厘米最小着陆尺寸 (MLS)。该种群的平均蛋数为240.18，平均蛋重为0.0122 g，平均蛋直径为2.702 mm。虽然雌性总身长的增加对平均总卵数有积极影响，但采样期（12 月至 5 月的渐进孵化期）造成了负面影响。发现总长度为 1 毫米的平均总蛋数为 2.18。当将 Hirfanlı Dam Lake 小龙虾种群的平均多足卵数与其他地区的 P. leptodactylus 种群进行比较时，得出的结论是该种群的产量很高。