อ้างอิงหลัก | Holčík, J., P. Banarescu and D. Evans, 1989 |
วิธีการ,แบบ | dioecism |
การปฏิสนธิ | external |
Mating type | polyandry |
ความถี่ของการวางไข่ | one clear seasonal peak per year |
Spawning aggregation | อ้างอิง |
จำนวนของตัวที่วางไข่ | อ้างอิง |
กลุ่มที่มีการสืบพันธุ์ |
nonguarders open water/substratum egg scatterers |
Parental Care | none |
คำอธิบายของวงจรชีวิตและพฤติกรรมการผสมพันธุ์ | During breeding, males arrive at the spawning area ahead of the females. One or two of these males chases a ripe female as soon as it arrives in the area (polyandry) (Ref. 6258). The queue of males maybe longer composed of about 15 to 25 individuals, but only two prod their snouts against the female's belly (Ref. 205). After rounds of curved course through the interlacing branches near the surface (Ref. 205), males fertilize the egg ribbon as the female lays them over weeds or other submerged objects (Ref. 6258). Eggs grouped in long white ribbons (up to 1 m) are found over submerged objects (Ref. 41678). Eggs hatch in about 8 to 16 days at normal temperatures (Ref. 6258). Males mature at 2-3 years and females at 4 years. Spawning, in the Northern hemisphere, happens in spring in waters with temperatures between 7-8°C. Eggs are laid in sticky strings becoming fixed to aquatic plants and rocks. Incubation lasts about 1- 8 days at 1- 3°. Egg size 2.0-2.5mm, larval length at hatching 5mm. |
ค้นหาแหล่งอ้างอิงเพิ่มเติมด้วยการสืบพันธุ์ | Scirus |