Caracterização das proporções anatômicas e tempo de trí­¢nsito gastrointestinal do apaiari e do acará-bandeira

Thiago El Hadi Perez FABREGAT; Thiago Matias Torres do NASCIMENTO; Thiago Scremin PEREIRA; Andressa Steffen BARBOSA

Authors

Thiago El Hadi Perez FABREGAT Universidade do Estado de Santa Catarina (UDESC), Centro de Ciências Agroveterinárias (CAV) http://orcid.org/0000-0003-3718-5224
Thiago Matias Torres do NASCIMENTO Universidade Estadual Paulista (UNESP), Faculdade de Ciências Agrárias e Veterinárias (FCAV)
Thiago Scremin PEREIRA Universidade Estadual Paulista (UNESP), Faculdade de Ciências Agrárias e Veterinárias (FCAV)
Andressa Steffen BARBOSA Universidade do Estado de Santa Catarina (UDESC), Centro de Ciências Agroveterinárias

Keywords:

anatomy, freshwater fish, nutrition, ornamental fish, Pterophyllum scalare, Astronotus ocellatus

Abstract

This study aimed to characterize the anatomy of digestive tract and the gastrointestinal transit time of oscar (Astronotus ocellatus) and angelfish (Pterophyllum scalare), relating the results with the feeding habit. For this purpose, two experiments were conducted. In the first, the stomach somatic index and the intestinal coefficient were evaluated for the two species. In the second experiment, the gastrointestinal transit time was evaluated. The stomach-somatic index averages were higher (P<0.05) for the oscar (0.54 Â± 0.14) compared to that for the angelfish (0.19 Â± 0.05). On the other hand, the intestinal coefficient was lower (P<0.05) in the oscar (0.46 Â± 0.07) than in the angelfish (0.99 Â± 0.22). Furthermore, the oscar gastrointestinal transit time (10 h) was faster (P<0.05) in relation to that of the angelfish (12 h). From the results, it is possible to conclude that the oscar digestive tract was more adapted for carnivorous habits, and the angelfish approaches more of a generalist omnivore. Moreover, variations in the size of the digestive system organs could affect the gastrointestinal transit time.

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