Gillet and Quétin, 2006


Gillet, C. and Quétin, P. (2006) Effect of temperature changes on the reproductive cycle of roach in Lake Geneva from 1983 to 2001. Journal of fish biology, pp. 518-534

Associated characteristics

Species Development state Trait Primary Data Secondary Data
Carassius auratus Spawning conditions Spawning temperature >17 17.0 °C
Rutilus rutilus Female Oocyte development Roach is a total spawner with synchronous oocyte development, i.e. roach contain only one stage of developing oocytes, and ovulation is synchronous for all vitellogenic oocytes No category
Rutilus rutilus Female Onset of oogenesis Developed quickly during the autumn, in September. Ovary development proceeded slowly during the winter, increased by 3 in the period from December to February [Roach belong to a group of temperate zone cyprinids that initiates gonad develoment while the temperature and photoperiod are decreasing in autumn. Ovarian development begins in early autum, and then vitellogenesis proceeds slowly throughout winter with the final maturation stages of oocytes and spawning occuring in spring or early winter] Could indicate that the lowest temperature at which roach ovary development occurs is close to 3°C ['January', 'February', 'March', 'April', 'May', 'June', 'September', 'October', 'November', 'December']
Rutilus rutilus Female Intensifying oogenesis activity The final stages of ovary development occurred rapidly in early spring. Ig increased by 5 in the period from the beginning of April to mid-May ['April', 'May', 'June']
Rutilus rutilus Female Maximum GSI value Peak at the end of May at 20-23% 21.5 percent
Rutilus rutilus Female Resting period After the spawning period, a quiescent period of gonad activity occurs during the summer because warm temperature (>20°C) and the long hours of daulight block the development of gonads until the end of August 20.0 months
Rutilus rutilus Spawning conditions Spawning migration distance Roach migrate towards deeper water (25-35 m) in winter when water temperature is constant through the water column in deep lakes. Roach migrate towards warmer waters near the surface when a temperature gradient begins to appear again in the spring 30.0 km
Rutilus rutilus Spawning conditions Spawning season Spawn in May or June, depending on the water temperature in Lake Geneva ['May', 'June']
Rutilus rutilus Spawning conditions Spawning period duration During the first half of the survey period, roach spawned at the end of may or at the beginning of June. The spawning period lasted c. 1 week. During the second half of the survey period, the roach spawning period occurred in mid-May 1.0 weeks
Rutilus rutilus Spawning conditions Spawning temperature 18-20; also described as 18-20; 16; 12; and 10 19.0 °C
Rutilus rutilus Spawning conditions Spawning water type In lake Geneva, along the embankments Stagnant water
Rutilus rutilus Spawning conditions Spawning depth Near the surface of the water No data
Rutilus rutilus Spawning conditions Spawning substrate In lake Geneva, roach usually spawn on rocks Lithophils
Tinca tinca Female Onset of oogenesis Vitellogenesis begins at the end of winter ['January', 'February', 'March']
Tinca tinca Spawning conditions Spawning temperature >18 18.0 °C