Kaip atpažinti Greater Amberjack

Norėdami atpažinti Greater Amberjack (Seriola dumerili), atkreipkite dėmesį į šiuos pagrindinius požymius.

Fizinės ypatybės

Kūno forma

torpedo

Spalva

Adults are typically dark blue-grey or olive-brown dorsally, fading to silvery-white on the flanks and belly. A distinctive amber or yellowish stripe often runs horizontally along the lateral line, from the snout through the eye to the base of the caudal fin. Juveniles have five to seven dark vertical bars on their sides and a prominent dark band running from the snout through the eye to the dorsal fin.

Žvynų tipas

cycloid

Burnos padėtis

terminal

Skiriamieji požymiai

Robust, elongated, and slightly compressed body., A dark amber or yellowish stripe along the lateral line (adults)., A dark diagonal band from the snout through the eye to the first dorsal fin (juveniles and sub-adults, often fading with age)., Large, forked caudal fin., Absence of scutes along the lateral line, unlike some other carangids.

Nugaros pelekas

Two dorsal fins; the first is short with 7-8 spines, the second is much longer with 1 spine and 29-35 soft rays. The anterior rays of the second dorsal fin are elevated.

Uodegos pelekas

Deeply forked and powerful caudal fin, characteristic of fast-swimming pelagic predators.

Krūtinės pelekas

Relatively short pectoral fins.

Skiriamieji pelekai

Anal fin similar in shape and size to the second dorsal fin, with 2 detached spines followed by 1 spine and 18-22 soft rays. Pelvic fins are well-developed.

Atpažinimo patarimai

1. 1

   Body Shape and Coloration

   Look for the torpedo-shaped body, dark dorsal coloration, and silvery belly. The amber stripe on adults and vertical bars on juveniles are key.

2. 2

   Head Stripe

   The dark diagonal band from the snout through the eye to the first dorsal fin is a crucial identifier for juveniles and sub-adults, distinguishing it from other Seriola species.

3. 3

   Lateral Line

   Unlike some other jacks, Seriola dumerili lacks prominent scutes (bony plates) along its lateral line, which is a smooth curve.

4. 4

   Fin Count

   Counting the soft rays in the second dorsal fin (29-35) and anal fin (18-22) can help confirm identification, especially when distinguishing from similar species.

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