morphology of shrimp

 

shrimp external anatomy:

*Shrimp Body Structure*

·        Laterally compressed, divided into two regions:

·        Cephalothorax (anterior)

·        Abdomen (posterior)

*Cephalothorax*

-         Fusion of 5 head segments and 8 thoracic segments

-         Contains:

-         Eyes (stalked compound eyes)

-         Antennae

-         Mandibles (jaws)

-         First 5 pairs of appendages

*Abdomen*

-         Composed of 6 distinct segments

-         Contains:

-         Swimming legs (pleopods) on first 5 segments

-         Tail fan (last segment):

-         2 pairs of uropods

-         Telson

-         *Appendages*

-         19 pairs in total

-         Cephalon (head): 5 pairs

-         Thorax: 8 pairs

-         Abdomen: 6 pairs

*Key Features*

-          Exoskeleton covers external surface

-          Eyes for photoreception and wide field vision

-          Swimming legs for propulsion

-          Tail fan for rapid backward movement

*Shrimp Appendages*

-         Antennules (pair)

-         Antennae (pair)

-         Mandibles (pair)

-         Maxillae (pair)

-         Maxillipeds (pair)

-         Thoracic legs (8 pairs)

-         Pleopods (swimming legs, 5 pairs)

-         Uropods (2 pairs)

-         Telson

*Shrimp Appendages*

_Thoracic Appendages (8 pairs):_

-         1^st Maxillipeds

-         2^nd Maxillipeds

-         3^rd Maxillipeds

-         1^st Pereopods (chelate legs)

-         2^nd Pereopods (chelate legs)

-         3^rd Pereopods (non-chelate)

-         4^th Pereopods (non-chelate)

-         5^th Pereopods (non-chelate)

-         _Abdominal Appendages (6 pairs):_

-         1^st Pleopods (swimmerets)

-         2^nd Pleopods (swimmerets)

-         3^rd Pleopods (swimmerets)

-         4^th Pleopods (swimmerets)

-         5^th Pleopods (swimmerets)

-         6^th pair: Uropods (tail fan)

*Identification of Male and Female Shrimp*

_Males:_

-          External reproductive organ: Petasma

-          Location: 1^st abdominal segment

_Females:_

-          External reproductive organ: Thelycum

-          Location: Base of 4^th and 5^th pair of walking legs