What is the hatching period for zebrafish?

approximately 72 hours
Laboratory zebrafish embryos and larva are normally maintained in incubators during the first week (7 days) after egg fertilization. Zebrafish embryos dechorionate (hatch) at approximately 72 hours post fertilization [3 days post fertilization (dpf)].

What is the life cycle of zebrafish?

The zebrafish lifecycle is divided into four major periods: Embryo, larva, juvenile, and adult. The full life cycle from fertilized egg to adult is a quick 90 days. Early development occurs at a rapid, but predictable rate when the embryos are raised at 28 °C.

How many eggs do zebrafish lay?

After 3 – 4 months zebrafish are sexually mature and can generate new offspring. A single female can lay up to 200 eggs per week.

How old are zebrafish larvae?

After the embryonic period, larval development lasts ∼6 weeks, during which the fish more than triple in length and progress through a series of morphological changes that transform the fins, pigment pattern, and overall body morphology into the juvenile configuration. In zebrafish, this occurs around 45 dpf at 28.5°C.

How many years can a zebra fish live?

In captivity, zebrafish can live over 5 years, however generally they live for 2 to 3 years, and grow up to about 65 mm long. They are an omnivore, feeding on the small organisms found in the slow-moving waterways where they favour living.

What do you feed zebrafish?

Feeding. Zebrafish can be fed with dry food (food size from 100 microns for larvae to 300/400 microns for adult fish) or live food (brine shrimps). Brine shrimp (Artemia sp.) eggs are available from local pet shops and can be hatched in the laboratory by following the simple steps described below.

How long are zebrafish larvae?

What happened during the Pharyngula period?

Pharyngula Period Transition from Prim 5 to Long-pec The body axis begins to straighten and the head straightens out and lifts dorsally Notochord is well developed Formation of the Dorsal and Ventral Stripe Nervous system is hollow and expanding anteriorly The brain has developed into 5 distinct lobes

What are the stages of embryogenesis in the zebrafish?

ABSTRACT We describe a series of stages for development of the embryo of the zebrafish, Danio (Brachydanio) rerio. We define seven broad peri- ods of embryogenesis-the zygote, cleavage, blas- tula, gastrula, segmentation, pharyngula, and hatching periods.

What is pronephrogenesis in the zebrafish?

The first step of pronephrogenesis in the zebrafish is the formation of the intermediate mesoderm during gastrulation, which occurs in response to secreted morphogens such as BMPs and Nodals.

What is the tuberal hypothalamus in zebrafish?

We found the tuberal hypothalamus in zebrafish embryos to be relatively large and to comprise previously ill-defined regions around the posterior hypothalamic recess. The mamillary hypothalamus is smaller and concentrates to rather medial areas in proximity to the anterior end of the neural tube floor plate.