Come identificare Lake Trout

Per identificare Lake Trout (Salvelinus namaycush), osserva queste caratteristiche chiave.

Caratteristiche fisiche

Forma del corpo

torpedo

Colorazione

Highly variable, typically dark green to grey or brownish on the back, fading to lighter sides and a white belly. Covered with numerous light, often yellowish or whitish, irregular spots on the head, body, and fins (excluding the anal fin). Spots are generally smaller than the pupil. The dorsal and caudal fins often have dark wavy lines or vermiculations.

Tipo di squame

cycloid

Posizione della bocca

terminal

Caratteristiche distintive

Deeply forked caudal fin (tail fin), Presence of an adipose fin (small, fleshy fin between the dorsal and caudal fins), Light spots on a darker background (distinguishing it from most other chars and trouts), Large mouth extending beyond the posterior margin of the eye, Strong, conical teeth on jaws, vomer, and palatines

Pinna dorsale

Single dorsal fin, typically with 10-12 rays. Adipose fin present.

Pinna caudale

Deeply forked, often with pointed lobes.

Pinna pettorale

Relatively large and rounded, positioned low on the body.

Pinne distintive

Pelvic fins are abdominal, positioned well behind the pectoral fins. All fins, except the anal fin, typically have light spots.

Consigli per l'identificazione

1. 1

   Caudal Fin

   The deeply forked tail is a primary distinguishing feature, setting it apart from most other trout and char species which typically have less-forked or square tails.

2. 2

   Spotting Pattern

   Numerous light (yellowish to whitish) spots on a darker background, including on the head, body, and most fins. These spots are generally smaller than the pupil of the eye. This contrasts with Brook Trout (Salvelinus fontinalis) which have red spots with blue halos and vermiculations on the back, and Brown Trout (Salmo trutta) which have dark spots with halos and often red spots.

3. 3

   Adipose Fin

   Presence of a small, fleshy adipose fin, characteristic of salmonids.

4. 4

   Mouth Size

   A large mouth extending well past the eye, indicating its predatory nature.

Esplora Lake Trout