First feeding of diploid and triploid yellowtail tetra Astyanax altiparanae: An initial stage for application in laboratory studies

Abstract

In this study, the aim was to establish a protocol for first feeding of diploid and triploid yellowtail tetra Astyanax altiparanae in laboratory conditions. The fry were fed with five different diets: (i) Artemia franciscana nauplii, (ii) plankton, (iii) dry food, (iv) Artemia franciscana nauplii + plankton, and (v) Artemia nauplii + plankton + dry food. Additionally, the growth and survival rates of diploid and triploid individuals were also evaluated. On day 10, the length of the fish between the treatments differed significantly (p = .0001) and ranged from 4.07 AE 0.06 mm (dry food) to 8.50 AE 0.64 mm (plankton + Artemia). The sizes of the fish increased with time, except for the fish fed with dry food. The survival rates were similar for the fish fed with the four diets and ranged from 80.7 AE 5.4% (dry food + plankton + Artemia to 92.0 AE 1.6% (plankton + Artemia), but differed from the fish fed with dry food (17.7 AE 5.8%, p = .0017). Diploids and triploids did not present differences on day 0 (p = .2252) and on day 10 (p = .4844) when the fish presented 6.77 AE 0.25 mm and 6.54 AE 0.15 mm respectively. Survival of diploids (87.3 AE 5.13%) and triploids (74.67 AE 2.30%) were also similar (p = .0285). These data are innovative and useful for establishing protocols for this species in both academic and applied sciences.

Early ontogeny of yellowtail tetra fish Astyanax lacustris (Characiformes: Characidae)

“…This species can survive naturally in limiting environments, such as decreased water quality and high population density, emphasizing its potential in intensive aquaculture and aquarium systems (Bertolini et al., 2018) and has been used in basic studies and applied and in aquaculture in the laboratory (Gonçalves, Parisi, Bonelli, Sussel, & Viegas, 2014; Santos et al., 2016; Yasui et al., 2015).…”

Establishing a model fish for the Neotropical region: The case of the yellowtail tetra Astyanax altiparanae in advanced biotechnology

“…It was necessary then to understand in detail the adequate food for the yellowtail tetra. In order to fill this gap, Bertolini et al (2018) evaluated different diets and concluded that artemia and dry food optimized the growth and survival under laboratory conditions, giving them a routine for dependable growth of larvae into the juvenile stage.…”

Return temperature after heat shock affects the production of tetraploids in the yellowtail tetra Astyanax altiparanae

“…Among such species, the A. altiparanae has recently been considered a model organism for basic and applied studies (Pereira-Santos et al, 2016;do Nascimento et al, , 2020ados Santos et al, 2018), especially for chromosome set manipulation, such as induction (Adamov et al, 2017;Piva et al, 2018) and rearing of triploid fish (Bertolini et al, 2018). Other studies have also shown that triploid females are sterile (do Nascimento et al, 2017a) and present increased carcass yield (do Nascimento et al, 2017b).…”