Credit for the video: Fish Culture Development course (2010) – Spanish speaker group, description: Abdel Rahman El Gamal
In mouth fish brooders such as the key farmed tilapia, a female incubates fertilized eggs till hatching. The incubation period is directly related to water temperature and can range from as short as 3 days to as long as 6-7 days. Taking embryos from female’s mouth and continue the incubation in hatchery incubators will shorten the spawning interval of females and so enhancing the capacity of the hatchery. This short video shows the way of collecting the embryos by opening the female’s mouth and shaking the mouth into a volume of water. This particular video shows an advanced stage of embryo development (hatching). Training is important for identifying –from distance- the female incubating embryos and for gentle handling of target female in order to avoid the spitting and possible loss of embryos.
