Mystus rhegma is a Misapplied Synonym of Mystus cavasius and also a Valid Name or Synonym of another species as well.

Mystus cavasius (Hamilton, 1822)

Gangetic Mystus - Golsha-tengra - Native Fish - Wild (Freshwater)

view: Lateral [Hossain, 2019]

Systematic Position: [2]

Kingdom	:	Animalia
Phylum	:	Chordata
Class	:	Teleostei
Order	:	Siluriformes
Family	:	Bagridae
Genus	:	Mystus
Species	:	Mystus cavasius

Common Names:

English	:	Gangetic Mystus[729]
Bangla	:	Golsha-tengra[5] Kabashi-tengra[5] Golsha-tengra[5] Kabasi-tengra[274] Ghunga[274] Fhang[274] Kabasi golsha[729] Guilla[598]

Synonyms:

Pimelodus cavasius Hamilton, 1822
Aoria cavasius (Hamilton, 1822)
Bagrus cavasius (Hamilton, 1822)
Macrones cavasius (Hamilton, 1822)
Mystus cavensius (Hamilton, 1822)
Mystus cavassius (Hamilton, 1822)
Mystus mukherjii Ganguly and Datta, 1975
Pimelodus seengtee (Non Sykes, 1839 May)
Mystus keletius (Non Valenciennes, 1840 Jan)
Mystus rhegma (Non Fowler, 1935 Jun)

Maximum Length and Weight:

45 cm (TL) ^[347] 231 mm (TL) ^[5]

Inter-Length Relationship:

Head length : Total length : Standard length = 1 : 6 : 4 ^[5]
Body height : Total length : Standard length = 1 : 6-6.3 : 4-4.5 ^[5]
Eye Diameter : Head length = 1 : 3.5-4 ^[5]
Eye Diameter : Snout length = 1 : 1.3-1.8 ^[5]
Eye Diameter : Inter orbial width = 1 : 1.3 ^[5]

Taxonomic Formula:

D. I/7; P₁. I/8; P₂. 6; A. 11 ^{[Rahman, 2005]}
D I 7; A iv 7-9; P I 8; V i 5 ^{[Talwar and Jhingran, 1991]}
B VI; D 1/7; A 11-13(4/7-9); P I/8; V 6; C 16 ^{[Shafi and Quddus, 1982]}
B vi; D 8 (1/7); A 11-13 (4/7-9); P 9 (1/8); C 16 ^{[Bhuiyan, 1964]}

Scales:

Scaleless. [5]

Chemistry:

Name

Amount

Unit

Body Parts

Matter Type

Specimen

Ref.

Ash

22.68

%

Whole body

Dry

Wild

887

Ash

4.77

%

Whole body

Fresh

Wild

887

Ash

1.0

g/100 g

Edible parts

Raw

824

Calcium

1.45

%

Whole body

Dry

Wild

887

Calcium

0.30

%

Whole body

Fresh

Wild

887

Calcium

120

mg/ 100 g

Edible parts

Raw

Wild

824

Copper

0.039

mg/ 100 g

Edible parts

Raw

Wild

824

Energy

479

kJ/100 g

Edible parts

Raw

824

Fat

5.1

g/100 g

Edible parts

Raw

824

Gross energy

4.16

%

Whole body

Fresh

Wild

887

Gross energy

19.80

kJ/g

Whole body

Dry

Wild

887

Iodine

13

μg/ 100 g

Edible parts

Raw

Wild

824

Iron

1.8

mg/ 100 g

Edible parts

Raw

Wild

824

Lipid

10.78

%

Whole body

Dry

Wild

887

Lipid

2.26

%

Whole body

Fresh

Wild

887

Magnesium

26

mg/ 100 g

Edible parts

Raw

Wild

824

Manganese

0.22

mg/ 100 g

Edible parts

Raw

Wild

824

Moisture

78.99

%

Whole body

Fresh

Wild

887

Moisture

76.8

g/100 g

Edible parts

Raw

824

Muscle protein

16.16

%

Whole body

Fresh

Wild

887

Phosphorus

1.01

Whole body

Dry

Wild

887

Phosphorus

0.21

%

Whole body

Fresh

Wild

887

Phosphorus

180

mg/ 100 g

Edible parts

Raw

Wild

824

Potassium

210

mg/ 100 g

Edible parts

Raw

Wild

824

Protein

65.72

%

Whole body

Dry

Wild

887

Protein

13.81

%

Whole body

Fresh

Wild

887

Protein

16.8

g/100 g

Edible parts

Raw

824

Selenium

41

μg/ 100 g

Edible parts

Raw

Wild

824

Sodium

33

mg/ 100 g

Edible parts

Raw

Wild

824

Sulphur

220

mg/ 100 g

Edible parts

Raw

Wild

824

Zinc

1.3

mg/ 100 g

Edible parts

Raw

Wild

824

Conservation Status:

Global	:	Least Concern (LC)	(Version 3.1) [566]
Bangladesh	:	Near Threatened (NT)	(Version 3.1) [267]

Occurrence/Distribution:

Global	:	Bangladesh[70] India[6] Myanmar[832] Nepal[134] Pakistan[741] Sri Lanka[6] Thailand[994]
Bangladesh	:	Surma river, Sylhet[5] Padma river, Rajshahi[274] Chalan beel, Natore[490] Halda River, Chittagong Hill Tracts[598] Andharmanik river, Patuakhali[751] Sunamganj haor region, Sunamganj[729] Passur River, Khulna[752] Kaptai reservoir (Kaptai lake), Rangamati[753] Mahananda River, Chapainawabganj[775] River Choto Jamuna, Naogaon[9] Tulsiganga River, Joypurhat[780] Meghna river, Narsingdi[781] Dhepa river, Dinajpur[779] Buriganga River, Dhaka[798] Old brahmaputra, Mymensingh[796] Someshwari river, Netrokona[806] Bhairab river, Jashore[807] Sandha river, Pirojpur[810] Atrai River, Dinajpur[815] Banar River, Mymensingh[1023] Bangshi River, Dhaka[1024] Tanguar Haor, Sunamganj[1025] Punarbhaba, Dinajpur[1161] Dekhar haor, Sunamganj[1164] Feni river, Feni[1165] Muhuri river, Feni[1165] Sandha river, Pirojpur[1206] Belua river, Pirojpur[1207] Belua river, Pirojpur[1207] Agunmukha river, Patuakhali[1208]

Habitat and Environment:

Habitat:
Canal, Beel, Haor, Baor, River ^[347]

Environment:

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

Breeding Maturity:

Data not available

Breeding Season: (red background)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

[274]

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

[347]

Fecundity:

Absolute fecundity: 3,314 (min), 63,135 (max), Relative fecundity: 870 , ^[974]

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, Push net, Cast net ^[792]
Market price:
150-200 BDT/kg (Size: 30-35 cm, Weight: 40-50 g, Place: Noakhali, Bangladesh) ^[792]