Medaka Development: Difference between revisions

From Embryology
Line 44: Line 44:
|  6  | 2 h 55 min | 16 cell
|  6  | 2 h 55 min | 16 cell
|-
|-
|  7  | 3 h 30 min | 32 cell
|  7   
| 3 h 30 min
| 32 cell
|-
|-
|  8  | 4 h 5 min | Early morula
|  8   
| 4 h 5 min  
| Early morula
|-
|-
|  9  | 5 h 15 min | Late morula
|  9   
| 5 h 15 min  
| Late morula
|-
|-
|  10 | 6 h 30 min | Early blastula
|  10  
| 6 h 30 min  
| Early blastula
|-
|-
|  11  | 8 h 15 min | Late blastula
|  11   
| 8 h 15 min  
| Late blastula
|-
|-
|  12  | 10 h 20 min | Pre-early gastrula
|  12   
| 10 h 20 min  
| Pre-early gastrula
|-
|-
|  13  | 13 h | Early gastrula
|  13   
| 13 h  
| Early gastrula
|-
|-
|  14  | 15 h | Pre-mid-gastrula
|  14   
| 15 h  
| Pre-mid-gastrula
|-
|-
|  15  | 17 h 30 min | Mid-gastrula
|  15  
  | 17 h 30 min  
| Mid-gastrula
|-
|-
|  16  | 21 h | Late gastrula  
|  16   
| 21 h  
| Late gastrula  
|-
|-
|  17  | 1 day 1 h | Early neurula  (head formation)
|  17   
| 1 day 1 h  
| Early neurula  (head formation)
|-
|-
|  18  | 1 day 2 h | Late neurula  (optic bud formation)
|  18   
| 1 day 2 h  
| Late neurula  (optic bud formation)
|-
|-
|  19  | 1 day 3 h 30 min | 2 somite
|  19   
| 1 day 3 h 30 min  
| 2 somite
|-
|-
|  20  | 1 day 7 h 30 min | 4 somite
|  20   
| 1 day 7 h 30 min  
| 4 somite
|-
|-
|  21  | 1 day 10 h | 6 somite | (brain regionalization and otic vesicle formation)
|  21   
| 1 day 10 h  
| 6 somite  (brain regionalization and otic vesicle formation)
|-
|-
|  22  | 1 day 14 h | 9 somite | (appearance of heart anlage)
|  22   
| 1 day 14 h  
| 9 somite  (appearance of heart anlage)
|-
|-
|  23  | 1 day 17 h | 12 somite |  (formation of tubular heart)
|  23   
| 1 day 17 h  
| 12 somite  
|  (formation of tubular heart)
|-
|-
|  24  | 1 day 20 h | 16 somite | (start of heart beating)
|  24   
| 1 day 20 h  
| 16 somite  (start of heart beating)
|-
|-
|  25  | 2 days 2 h | 18–19 somite |  (onset of blood circulation)
|  25   
| 2 days 2 h  
| 18–19 somite  
|  (onset of blood circulation)
|-
|-
|  26  | 2 days 6 h | 22 somite | (development of guanophores and vacuolization of the notochord)
|  26   
| 2 days 6 h  
| 22 somite  (development of guanophores and vacuolization of the notochord)
|-
|-
|  27  | 2 days 10 h | 24 somite | (appearance of pectoral fin bud)
|  27   
| 2 days 10 h  
| 24 somite  (appearance of pectoral fin bud)
|-
|-
|  28  | 2 days 16 h | 30 somite | (onset of retinal pigmentation)
|  28   
| 2 days 16 h  
| 30 somite  (onset of retinal pigmentation)
|-
|-
|  29  | 3 days 2 h | 34 somite | (internal ear formation)
|  29   
| 3 days 2 h  
| 34 somite  (internal ear formation)
|-
|-
|  30  | 3 days 10 h | 35 somite | (blood vessel development)
|  30   
| 3 days 10 h  
| 35 somite  (blood vessel development)
|-
|-
|  31  | 3 days 23 h | Gill blood vessel formation
|  31   
| 3 days 23 h  
| Gill blood vessel formation
|-
|-
|  32  | 4 days 5 h | Somite completion | (formation of pronephros and air bladder)
|  32   
| 4 days 5 h  
| Somite completion  (formation of pronephros and air bladder)
|-
|-
|  33  | 4 days 10 h | |  at which notochord vacuolization is completed
|  33   
| 4 days 10 h
|  at which notochord vacuolization is completed
|-
|-
|  34  | 5 days 1 h | Pectoral fin blood circulation
|  34   
| 5 days 1 h  
| Pectoral fin blood circulation
|-
|-
|  35  | 5 days 12 h | |  at which visceral blood vessels form
|  35   
| 5 days 12 h
|  at which visceral blood vessels form
|-
|-
|  36  | 6 days | Heart development
|  36   
| 6 days
| Heart development
|-
|-
|  37  | 7 days | Pericardial cavity formation
|  37   
| 7 days  
| Pericardial cavity formation
|-
|-
|  38  | 8 days | Spleen development | (differentiation of caudal fin begins)
|  38   
| 8 days  
| Spleen development  (differentiation of caudal fin begins)
|-
|-
|  39  | 9 days | Hatching
|  39   
| 9 days  
| Hatching
|-
|-
|  40 | 1st fry |  
|  40  
| 1st fry  
|  
|-
|-
|  41 | |  
|  41  
|  
|  
|-
|-
|  42 | |  
|  42  
|  
|  
|-
|-
|  43 | |  
|  43
|  
|
|-
|-
|  44 | |  
|  44
|  
|
|-
|-
|  45 | |  
|  45
|  
|
|}
|}


Revision as of 16:22, 14 July 2010

Introduction

Medaka

Medaka Oryzias latipes or Japanese rice fish is a member of the killifish family first described in 1846 and has been widely used as a aquarium fish. A modified aquarium version with a genetically modified fluorescent (GFP) version also now available in some countries.

A recent study by Iwamatsu T., 2004[1] has characterised the stages of normal fish development.

Medaka fish were also the first for the first vertebrate animal to mate in space (The International Microgravity Laboratory IML-2/STS-65 mission in 1994) as a developmental model for space experiments. The fish has also been used in studies of pigmentation development.

Links: original Medaka page

Taxon

cellular organisms; Eukaryota; Fungi/Metazoa group; Metazoa; Eumetazoa; Bilateria; Coelomata; Deuterostomia; Chordata; Craniata; Vertebrata; Gnathostomata; Teleostomi; Euteleostomi; Actinopterygii; Actinopteri; Neopterygii; Teleostei; Elopocephala; Clupeocephala; Euteleostei; Neognathi; Neoteleostei; Eurypterygii; Ctenosquamata; Acanthomorpha; Euacanthomorpha; Holacanthopterygii; Acanthopterygii; Euacanthopterygii; Percomorpha; Smegmamorpha; Atherinomorpha; Beloniformes; Adrianichthyoidei; Adrianichthyidae; Oryziinae; Oryzias

Development Overview

Development has been characerised by light microscope observation into 39 prehatch stages and 6 posthatch stages.

Prehatch features observed included: number and size of blastomeres, form of the blastoderm, extent of epiboly, central nervous system, number and form of somites, optic and otic, notochord, heart, blood circulation, the size and movement of the body, tail, membranous fin (fin fold), viscera (liver gallbladder, gut tube), spleen and swim (air) bladder.

Posthatch features observed included: fins, scales and secondary sexual characteristics.

Developmental Stages

Stage Time Event
0 Unfertilized eggs
3 min | Activated egg
2. Blastodisc
1 h 5 min | 2 cell
1 h 45 min | 4 cell
2 h 20 min | 8 cell
2 h 55 min | 16 cell
7 3 h 30 min 32 cell
8 4 h 5 min Early morula
9 5 h 15 min Late morula
10 6 h 30 min Early blastula
11 8 h 15 min Late blastula
12 10 h 20 min Pre-early gastrula
13 13 h Early gastrula
14 15 h Pre-mid-gastrula
15 17 h 30 min Mid-gastrula
16 21 h Late gastrula
17 1 day 1 h Early neurula (head formation)
18 1 day 2 h Late neurula (optic bud formation)
19 1 day 3 h 30 min 2 somite
20 1 day 7 h 30 min 4 somite
21 1 day 10 h 6 somite (brain regionalization and otic vesicle formation)
22 1 day 14 h 9 somite (appearance of heart anlage)
23 1 day 17 h 12 somite (formation of tubular heart)
24 1 day 20 h 16 somite (start of heart beating)
25 2 days 2 h 18–19 somite (onset of blood circulation)
26 2 days 6 h 22 somite (development of guanophores and vacuolization of the notochord)
27 2 days 10 h 24 somite (appearance of pectoral fin bud)
28 2 days 16 h 30 somite (onset of retinal pigmentation)
29 3 days 2 h 34 somite (internal ear formation)
30 3 days 10 h 35 somite (blood vessel development)
31 3 days 23 h Gill blood vessel formation
32 4 days 5 h Somite completion (formation of pronephros and air bladder)
33 4 days 10 h at which notochord vacuolization is completed
34 5 days 1 h Pectoral fin blood circulation
35 5 days 12 h at which visceral blood vessels form
36 6 days Heart development
37 7 days Pericardial cavity formation
38 8 days Spleen development (differentiation of caudal fin begins)
39 9 days Hatching
40 1st fry
41
42
43
44
45

References

  1. ↑ <pubmed>15210170</pubmed>


Search Pubmed

Search Pubmed: Medaka Development


Animal Development: axolotl | bat | cat | chicken | cow | dog | dolphin | echidna | fly | frog | goat | grasshopper | guinea pig | hamster | horse | kangaroo | koala | lizard | medaka | mouse | opossum | pig | platypus | rabbit | rat | salamander | sea squirt | sea urchin | sheep | worm | zebrafish | life cycles | development timetable | development models | K12
Historic Embryology  
1897 Pig | 1900 Chicken | 1901 Lungfish | 1904 Sand Lizard | 1905 Rabbit | 1906 Deer | 1907 Tarsiers | 1908 Human | 1909 Northern Lapwing | 1909 South American and African Lungfish | 1910 Salamander | 1951 Frog | Embryology History | Historic Disclaimer

Glossary Links

Glossary: A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Numbers | Symbols | Term Link

Cite this page: Hill, M.A. (2024, June 3) Embryology Medaka Development. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Medaka_Development

What Links Here?
© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
Retrieved from ‘https://embryology.med.unsw.edu.au/embryology/index.php?title=Medaka_Development&oldid=27304’
Powered by MediaWiki