Comportamento e bem-estar de peixe beta (Betta splendens, Regan, 1910).

• Autor(a) principal: Bonifacio, Caroline Teixeira
• Data de Publicação: 2019
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Espírito Santo (riUfes)
• Texto Completo: http://repositorio.ufes.br/handle/10/11187
• topic: Preference test; Maze; Animal behavior; Fish behavior; Teste de preferência; Labirinto; Comportamento animal; Comportamento peixes; Medicina Veterinária; Animais - Comportamento; Peixe; 619

The objective of the present study was to outline the behavioral profile and welfare of Betta splendens fish. Were used 40 male specimens of beta fish specimens between 90 and 120 days old. Of which 15 specimens were handled in a cross-type aquarium with four tips of the same length and distance from the center. Where preference tests were performed for four types of environmental component; colors (yellow, blue, green and red), vegetation (Egeria brasiliensis, Microsorum pteropus, Salvinia auriculata and artificial plants), shelters (PVC tube 50 mm, PVC tube in L, PVC tube 75 mm and pet bottle of 0.3L) and substrate (sand, shell, small stone and absence of substrate). Each animal was filmed for 20 minutes per day, for four days, for each test, totaling 16 days. At the end of the last test in the crosshead aquarium the depth preference test was started. Each animal was filmed for 10 minutes a day for two days. Frequency behaviors at each preference, permanence at each preference and latency time (for the test in the cross-type aquarium) were analyzed. In the second experiment, 25 specimens with approximately 120 days were randomly distributed in five types of housing (treatments); (T1) cup 0,3L, (T2) aquarium 3L without enrichment, (T3) aquarium 3L enriched, (T4) aquarium 38L without enrichment and (T5) aquarium 38L enriched. A maze-type aquarium was used to analyze cognitive behavior. Located inside the labyrinth had four stimulating points; females of the same species, carnivorous fish (Astronotus ocellatus), enriched environment and live food (Dendrocephalus brasiliensis). Behaviors such as laterality, latency, preference, frequency of visitation and permanence of visitation were recorded for 15 minutes per day. Was observed that confined beta fish remained longer in environments with a predominance of blue color (195,44 s), without substrate (306,53 s) and in the environment with a 0,3 liters pet bottle shelter (264,7 s). The aquatic plants elódea (Egeria brasiliensis) and ear (Salvinia auriculata) were the most visited (3.87 and 3.53 times) and where the betas fish stayed longer. In the second experiment, there was no difference between the means of beta-latency time of the different treatments (p = 0.5138). The fish of aquarium 2L without enrichment (T2) presented a right preference when leaving the labyrinth while the fish treatment of aquarium 2L with enrichment (T3) showed left labyrinth preference. The fish from the treatment of the 0.3 L cup (T1) showed preference for the left side at the exit of the labyrinth and frequented the oscar point more frequently (5.33). It"s concluded that beta fish presents preference for environment with predominance of blue color, without substrate, with shelter and natural plants, among those tested; Egeria brasiliensis and Salvinia auriculata. They are fish that tend to stay longer in the more superficial range of the aquarium, with frequent visits to the bottom, lower range. Betta splendens fish housed in environments such as 0,3 L cups and 2 L aquariums lead to an increase in the strength of lateralization similar to animals under stress.