Skip to main content
x
Salmoniformes‫راسته ‬‫آزادماهي‬ ‫شکلان
Salmonidae‫خانواده ‬‫آزادماهیان‬

(

1792

 , 

Walbaum

 ) 

Oncorhynchus mykiss

A

8-12

ALL

26-27

BLL

24-25

C

17-19

CP

54-56

D

10-12

DS

GR

16-22

LL

100-161

LS

P

11-17

PD

73-78

PT

Table

V

9-10

VS

VT

24-28

Iran distribution

Oncorhynchus mykiss

Species Image - Click To Zoom

Oncorhynchus mykiss

English Name : 

Rainbow or steelhead trout

Persian Name : 

Ghezelala-ye rangeankaman

Biology : 

Back and upper flank steel-blue, greenish,silvery-olive. Flanks and belly silvery, white or yellowishwith broad pink to red stripe and small black spots.Adipose fin with a black margin and a few spots. Pairedfins often orange-red. Spawning fish very dark with darkred or purple stripe. Young with 5-13 dark, oval parrmarks. Pyloric caeca 27-80. Vomer toothed. Breedingmales with an elongated and hooked lower jaw. In riversand lakes. Prefers temperatures below 20°C, but up to24°C tolerated. Maximum age 11 years, total length 122cm and weight 35 kg. Maturity at 3-5 years, some in firstyear. Spawning from March to August, usually in springat 5-13°C. A female excavates a redd by thrashing hertail. A dominant male courts a female by swimming overher in redd and by pressing against her. Females coverthe eggs with gravels. Spawning mostly in evening. Absolutefecundity up to 12,750 orange or pink eggs of upto 5 mm in diameter after swallowing. Food includeplankton, crustaceans, aquatic and terrestrial insects,snails, leeches, eggs, and fishes.

Distribution 

An exotic species widely intr oduced to suitable waters. Caspian Sea, Orumiyeh (Talkhehrud and Zarrinehrud rivers), Namak (Jajrud and Karaj rivers), Tigris (Gahar Lake, Dorudzan Dam, Beshar, Khersan, Dez and Kashkan rivers), Harirud (Kashaf River), and Is

 

 

Zayandehrud Dam (Isfahan)
Oncorhynchus mykiss

ارتقاء امنیت وب با وف بومی