Clupea megalopterus is a Senior Synonym of Ilisha megaloptera.

Ilisha megaloptera (Swainson, 1839)

Bigeye ilisha - Choukha - Native Fish - Wild (Freshwater)

Systematic Position: [2]

Kingdom	:	Animalia
Phylum	:	Chordata
Class	:	Teleostei
Order	:	Clupeiformes
Family	:	Pristigasteridae
Genus	:	Ilisha
Species	:	Ilisha megaloptera

Common Names:

English	:	Bigeye ilisha[6]
Bangla	:	Choukha[5]

Synonyms:

Ilisha motius (Hamilton, 1822)
Clupea megalopterus Swainson, 1839
Pellona megaloptera (Swainson, 1839)
Clupanodon motius Hamilton, 1822
Platygaster macropthalma Swainson, 1838
Clupea parva Swainson, 1839
Pellona dussumieri Valenciennes, 1847 Nov
Ilisha dussumieri (Valenciennes, 1847 Nov)
Pellona russellii Bleeker, 1852 Jan
Ilisha kampeni (Non Weber and De Beaufort, 1913)

Maximum Length and Weight:

74 mm (TL) ^[5] 25 cm (TL) and 100 g ^[1657]

Inter-Length Relationship:

Head length : Total length : Standard length = 1 : 5-5.4 : 4-4.4 ^[5]
Body height : Total length : Standard length = 1 : 4-4.4 : 3.2-3.5 ^[5]
Eye Diameter : Head length = 1 : 2.5-2.7 ^[5]
Eye Diameter : Snout length = 1 : .7 ^[5]
Eye Diameter : Inter orbial width = 1 : .5 ^[5]
Body Depth : Standard length = 1 : 2.92-3.08 ^[1174]
Head length : Standard length = 1 : 3.7-4 ^[1174]

Taxonomic Formula:

D. 2-3/12-14; P₁. 13-15; P₂. 7; A. 2-3/36-39 ^{[Rahman, 2005]}
D iii 14-15; A ii 46-52; P i 15-17; V i 6 ^{[Talwar and Jhingran, 1991]}

Scales:

45-47 scales on lateral line. 16 scales before dorsal fin base. 8-9 scales after pelvic fin base. 16-18 scales before pelvic fin base. [5]

Chemistry:

Data not available

Conservation Status:

Global	:	Least Concern (LC)	(Version 3.1) [498]
Bangladesh	:	Least Concern (LC)	(Version 3.1) [166]

Occurrence/Distribution:

Global	:	Andaman Island[746] Bangladesh[68] Brunei[68] Cambodia[823] China[68] India[855] Indonesia[449] Iran[916] Iraq[917] Laos[449] Malaysia[68] Myanmar[857] Pakistan[911] Singapore[68] Sri Lanka[68] Sri Lanka[68] Thailand[68] Vietnam[912]
Bangladesh	:	Padma river, Rajshahi[274] Passur River, Khulna[752] Mahananda River, Chapainawabganj[775]

Habitat and Environment:

Habitat: Data not available

Environment:

Parameters	Units	Minimum	Maximum	Optimum	Ref.
Temperature	-	-	-	-	-
pH	-	-	-	-	-
DO	-	-	-	-	-
Free CO2	-	-	-	-	-

Breeding Maturity:

Data not available

Breeding Season: (red background)

Data not available

Fecundity:

Data not available

Food and Feeding Habit:

Diet composition (%): Data not available

Importance:

Production and Marketing:
Production/Harvesting Season: (Green = Peak, Yellow = Off, Lemon = Moderate)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

[792]

Harvesting Gears:
Seine net, Gill net, Seine net, Beach seine net, Seine net, Set bag net, Lift net, Set bag net, Seine net, Trap ^[792]
Gill net, Gill net, Seine net, Beach seine net, Seine net, Set bag net, Lift net, Set bag net, Seine net, Trap ^[1657]
Purse seine net, Gill net, Seine net, Beach seine net, Seine net, Set bag net, Lift net, Set bag net, Seine net, Trap ^[1174]
Gill net, Gill net, Seine net, Beach seine net, Seine net, Set bag net, Lift net, Set bag net, Seine net, Trap ^[1657]
Market price:
150-200 BDT/kg (Size: 20-25 cm, Weight: 200-300 g, Place: Noakhali, Bangladesh) ^[792]