Como identificar Tietê Pacu

Para identificar Tietê Pacu (Myleus tiete), observe estas características principais.

Características físicas

Formato do corpo

compressed

Coloração

Adults typically exhibit a silvery-grey body with a darker dorsal region and lighter ventral side. Juveniles may have more pronounced dark spots or vertical bars that fade with age. Fins are often dusky or reddish, especially the anal and caudal fins in mature males.

Tipo de escama

cycloid

Posição da boca

terminal

Características distintivas

Deep, laterally compressed body, Relatively small head in proportion to body, Strong, bicuspid or tricuspid teeth adapted for herbivory, Adipose fin present, Males may develop a more pronounced nuchal hump during breeding season

Nadadeira dorsal

Single dorsal fin, relatively high, with 16-19 rays. The first few rays are often elongated in mature males.

Nadadeira caudal

Forked caudal fin, typically symmetrical.

Nadadeira peitoral

Well-developed pectoral fins, positioned low on the body.

Nadadeiras características

Anal fin is long, with 25-30 rays, and often reddish in color. Pelvic fins are small and located abdominally. Adipose fin is small and fleshy.

Dicas de identificação

1. 1

   Body Shape

   Look for a very deep, disc-shaped body that is strongly compressed laterally.

2. 2

   Dentition

   If possible to observe, the bicuspid or tricuspid teeth are a key identifier for the genus Myleus and its herbivorous diet.

3. 3

   Coloration

   Adults are generally silvery-grey, sometimes with a faint reticulated pattern. Juveniles may have more distinct dark spots or bars.

4. 4

   Fin Count

   Counting the rays in the dorsal (16-19) and anal (25-30) fins can help differentiate it from other Myleus species.

5. 5

   Geographic Location

   Its restricted distribution to the Tietê River basin is a primary identification factor.

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