Penaz, 1971



Citation


Penaz, M. (1971) Differences in mortality rate and development in feeding and starvating larvae of Chondrostoma nasus and Barbus barbus (Pisces). Zoologicke Listy, pp. 85-84

Associated characteristics


Species Development state Trait Primary Data Secondary Data
Barbus barbus Egg Incubation time Mean of 4 days 3 hours 4.0 days
Chondrostoma nasus Egg Incubation time 7 days and 16 hours 7.0 days
Barbus barbus Egg Degree-days for incubation Mean of 74.6 74.6 °C * day
Chondrostoma nasus Egg Degree-days for incubation Mean of 125.5 125.5 °C * day
Barbus barbus Larvae Temperature during larval development Reared at temperature between 20-21°C, close to natural conditions 20.5 °C
Chondrostoma nasus Larvae Temperature during larval development Reared at temperature between 15-18, close to natural conditions 16.5 °C
Barbus barbus Larvae Full yolk-sac resorption Termination of the yolk sac resorption 142 DD, or 8 days after hatching 142.0 °C * day
Chondrostoma nasus Larvae Full yolk-sac resorption Termination of the yolk sac resorption: 196 DD, or 13 days after hatching 196.0 °C * day
Barbus barbus Larvae Onset of exogeneous feeding Beginning of the exogeneous feeding at 102 DD, or 6 days after hatching 102.0 °C * day
Chondrostoma nasus Larvae Onset of exogeneous feeding About 130, or 10 days after hatching 130.0 °C * day
Esox lucius Larvae Onset of exogeneous feeding Pike larvae die within three days after the resorption of their yolk sac if no food is available to them No data
Barbus barbus Larvae Initial larval size L=9.0, for eleuterembryo in developmental stage A, 2days after hatching (6 days from the beginning of development) 9.0 mm
Leucaspius delineatus Larvae Initial larval size TL = 6.1, for eleuterembryo in developental stage A, just hatched (6 days 5 hours from the beginning of development) 6.1 mm
Chondrostoma nasus Larvae Larvae behaviour The starvating larvae show limited mobility already during the terminal phase of resorption of their yolk sac and mostly keep at the bottom of the aquarium, whereras the feeding larvae move throughout the water column and near water surface. During the last two or three days of their life, the fishes were in agony, showing but quite feeble signs of life. Demersal