Kennedy and Fitzmaurice, 1972


Citation

Kennedy, M. and Fitzmaurice, P. (1972) Some aspects of the biology of gudgeon Gobio gobio (L.) in Irish waters. J. Fish Biol., pp. 425-440

Associated characteristics

Species Development state Trait Primary Data Secondary Data
Gobio gobio Egg Oocyte diameter 1.375-1.625 [Ova] 1.5 mm
Gobio gobio Egg Egg Buoyancy Demersal Demersal
Gobio gobio Egg Egg adhesiveness Adhesive [Eggs adhere to pebbles, weeds, tree roots and sodden leaves] Adhesive
Gobio gobio Egg Incubation time 7-8 days at 17.5°C 7.5 days
Gobio gobio Egg Temperature for incubation 17-18 17.5 °C
Gobio gobio Egg Degree-days for incubation 120-140 [7-8 days at 17.5°C] 130.0 °C * day
Gobio gobio Larvae Initial larval size 5.45 5.45 mm
Gobio gobio Larvae Larvae behaviour Tend to keep to the bottom. where they rest upright with the spread out of their pectoral fins Demersal
Gobio gobio Larvae Temperature during larval development 18-20 19.0 °C
Gobio gobio Larvae Full yolk-sac resorption 90-100 [5 days at 18-20°C] 95.0 °C * day
Gobio gobio Larvae Onset of exogeneous feeding 60 [3 days at 18-20°C] 19.0 °C * day
Gobio gobio Female Age at sexual maturity 2-3 [Both sex] 2.5 year
Gobio gobio Female Length at sexual maturity 7.9 is the smallest mature female 7.9 cm
Gobio gobio Male Age at sexual maturity 2-3 [Both sex] 2.5 years
Gobio gobio Male Length at sexual maturity 6.9 is the smallest male 6.9 cm
Gobio gobio Male Male sexual dimorphism At spawning time, the heads of ripe male are thickly sprinkled with small nuptial tubercles like those of the dace. Nuptial tubercules also occur on the pectoral fins Present
Gobio gobio Spawning conditions Spawning season April to June [France] ['April', 'May', 'June']
Gobio gobio Spawning conditions Spawning temperature 14-17 [But sometimes 12°C] 15.5 °C
Gobio gobio Spawning conditions Spawning water type Rivulet of about 30 cm wide; canal of 2 m wide Stagnant water
Gobio gobio Spawning conditions Spawning depth 5 to 8 cm deep and 40-50 cm deep 45.0 m
Gobio gobio Spawning conditions Spawning substrate Pebbles, weeds, tree roots and sodden leaves Lithophils
Gobio gobio Spawning conditions Spawning release Ova were scattered over the bed of the rivulet singly, in two and three and occassionaly in clumps of 4 together No category