A ZEBRAFISH CALLED DANIO

BY TEACHER MARGARET

DANIO,
THE ZEBRAFISH

VIRGEN DE GUADALUPE SCHOOL

CONTENTS

What is the model organism? ............ page 3

Are you ready to be a scientist ? ....... page 4

What is a zebrafish? ............................... page 5

Development of a zebrafish in 7 days ..... page 6

Let's start ................................................. page 7

The first 24 hours of development .......... page 9

The first 48 hours of development ........ page 10

The heart of a zebrafish ....................... page 11

The following 72 hours of development .... page 12

Let's go to a laboratory ................................. page 13

Why is zebrafish used in research ? ......... page 14

Diseases ................................................... page 15

Danio Cebra en español ........................... page 16

An example of disease ........................... page 17

An example of research .......................... page 18

Nuestros proyectos en diferentes áreas...
pages 19, 20, 21

Bibliography .............................................. page 22

Despedida / Farewell.................................. page 23

WHAT IS A MODEL ORGANISM?

The term model organism is used to describe

any non-human species that is used in scientific research

to better understand the causes and potential treatments

of human diseases.

Model organisms are used for experiments that would be considered

unfeasible or unethical to carry out with humans.

ARE YOU READY TO BE
A SCIENTIST?

ZEBRA FISH

WHAT IS A ZEBRAFISH?

The zebrafish is a small freshwater fish that is approximately 4 cm long.

It originates from South Eastern Himalayan regions including India, Pakistan and Bangladesh.
It is now a popular aquarium fish and you are very likely to see one in your local garden centre or pet shop.
They are very robust and easy to look after in a small aquarium tank which makes them popular pets.

WATCH THE DEVELOPMENT OF A ZEBRAFISH IN JUST 7 DAYS.
READY ? STEADY? GO!!!!

LET'S START

The zebrafish embryo development takes place very fast.
Watch these videos about the first 24 hours of life.

Segmentación (10-24 hpf)

La capa de células que caía como un helado sobre el embrión se concreta en un anillo que lo abraza. Una parte de este se transformará en la cabeza y el resto en la cola.
En el centro se delimitará el saco vitelino, que irá disminuyendo de tamaño según avance el desarrollo y sus reservas se vayan consumiendo. El mesodermo se va dividiendo formando unas estructuras llamadas somites a partir de los cuales se formarán el esqueleto, los músculos y la dermis de las distintas parte de del cuerpo.
El sistema nervioso se va desarrollando y al final de la fase aparecen los primeros movimientos corporales.
También se forman las placodas óptica y ótica, esbozos de ojos y oídos, respectivamente, así como las células pigmentadas del epitelio de la retina y los melanóforos.