Category: Biology | Morphology

Photofeature: Appendages of Giant river prawn, Macrobrachium rosenbergii

Macrobrachium rosenbergii

Giant river prawn (Macrobrachium rosenbergii)

The body of Giant river prawn (Macrobrachium rosenbergii) is divided into two large parts such as cephalothorax and abdomen. Cephalothorax is consist of head and thorax.

Nineteenth pairs of appendages are found in giant river prawn. Appendages are divided into three groups according to their position of attachment. Such as- Cephalic appendage (five pairs), Thoracic appendage (eight pairs) and Abdominal appendage (six pairs). Photographs of all appendages are given bellow-


Cephalic appendages: Five pairs

  • 1. Antennule
  • 2. Antenna
  • 3. Mandible
  • 4. Maxilula
  • 5. Maxilla

Antennule

Antennule

Antenna (ventral view)

Antenna (ventral view)

Mandible (ventral view)

Mandible (ventral view)

Maxilula

Maxilula

Maxilla

Maxilla

 

Thoracic appendages: Eight pairs

  • 6. First maxillipede
  • 7. Second maxillipede
  • 8. Third maxillipede
  • 9-13. Walking leg or Pereopod
    • First and second walking leg [Chelate]
    • Third, Fourth, Fifth walking leg [Non-chelate]

First maxillipede

First maxillipede

Second maxillipede

Second maxillipede

Third maxillipede

Third maxillipede

First and second walking leg (chelate)

First and second walking leg (chelate)

Third, Fourth, Fifth walking leg (non-chelate)

Third, Fourth, Fifth walking leg (non-chelate)

 

Abdominal appendage: six pairs

  • 14-18. First, Second Third, fourth and fifth abdominal appendages or pleopods
  • 19. Uropod

First, Second and Third abdominal appendages

First, Second and Third abdominal appendages

Fourth abdominal appendage

Fourth abdominal appendage

Fifth abdominal appendage

Fifth abdominal appendage

Uropod

Uropod

 

N.B. Please click on each appendage to view large

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Author

Technical Specialist, WorldFish Center, Bangladesh and South Asia. B.Sc. Fisheries (Honours) from FMRT, KU and MS in Aquaculture from BAU. Contact: balaramssoq@yahoo.com

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