When ready to spawn, pairs of these cichlid fish species claim a sedentary breeding territory, which they aggressively defend for approximately a month after their fry have become free-swimming [ 23– 26].
The water temperature was maintained at 28 ± 1°C and pH 7. The day before spawning, two pairs of adult zebrafish were placed in a breeding tank equipped with a spawning tray.
In the following 5-6 weeks, the worms mature and begin spawning in pairs, and the immune response changes significantly: the Th1-type response decreases, but the Th2-type response becomes significantly enhanced.
In mid-December, a monsoon trough persisted along the west Pacific Ocean, spawning a pair of tropical disturbances both north and south of the equator.
He also recorded a number of solo albums, including "No Fun Aloud" (1982), which spawned a pair of top-40 singles, and "Strange Weather" (1992).
Embryos are obtained by natural spawning of breeding pairs of adult zebrafish.
Although we observed fewer spermatozoa in males exposed to the high PBDE-47 dose, minnow pairs spawned at similar rates in all treatments.
I spawned individual breeding pairs from both populations (n = 4 pairs from stream population, n = 8 pairs from reservoir population) in 40-L aquaria (i.e., one male and one female from the same population per aquarium) in a greenhouse at the Aquatic Research Facility at the University of Oklahoma, starting July 1 , 2009
Chi-square statistics were calculated to test whether mating success (i.e., trials classified as either spawning, pseudospawning, courtship or pairing) was distributed evenly among the two males of each pair.
Spawning is initiated by pairing up and courtship rituals.
Sexually mature convicts form monogamous pairs and spawn in small caves or crevices.
