Come identificare Brown Trout

Per identificare Brown Trout (Salmo trutta trutta), osserva queste caratteristiche chiave.

Caratteristiche fisiche

Forma del corpo

torpedo

Colorazione

Highly variable. Dorsal side typically olive-brown to dark brown, fading to yellowish-brown or golden on the flanks, and silvery-white on the belly. Characterized by numerous dark spots (often black or dark brown) on the back and sides, frequently encircled by a lighter halo. Red or orange spots, also often haloed, are common along the lateral line and flanks. Fin coloration matches body, with some fins having dark spots.

Tipo di squame

cycloid

Posizione della bocca

terminal

Caratteristiche distintive

Adipose fin present (a small, fleshy fin between the dorsal and caudal fins)., Vomerine teeth present, typically in a double row., Large mouth extending beyond the posterior margin of the eye., Relatively small scales compared to other freshwater fish.

Pinna dorsale

Single dorsal fin, typically with 10-14 rays. Adipose fin present.

Pinna caudale

Caudal fin typically square or slightly emarginate in younger fish, becoming more truncate with age.

Pinna pettorale

Paired pectoral fins, relatively small.

Pinne distintive

Pelvic fins are abdominal, located well behind the pectoral fins. All fins are soft-rayed except for the adipose fin.

Consigli per l'identificazione

1. 1

   Coloration and Spotting

   Look for the characteristic dark spots (often haloed) and frequently red/orange spots along the flanks. The overall body color is highly variable but generally brownish-gold.

2. 2

   Mouth Size

   The mouth is relatively large, extending past the posterior margin of the eye, a key differentiator from some other salmonids.

3. 3

   Adipose Fin

   Presence of a small, fleshy adipose fin between the dorsal and caudal fins confirms it as a salmonid.

4. 4

   Vomerine Teeth

   Examination of the vomerine teeth (on the roof of the mouth) reveals a double row, which helps distinguish it from Pacific salmon species.

5. 5

   Tail Shape

   The caudal fin is typically square or slightly emarginate, not deeply forked like some other trout species (e.g., Rainbow Trout).

Esplora Brown Trout