The influence of triiodothyronine (T3) on the early development of piracanjuba (Brycon orbignyanus)

Abstract

This paper reports the triiodothyronine's (T3) effects on the early growth and survival of piracanjuba (Brycon orbignyanus) produced from fertilized eggs hormone exposed. The study was carried out in two phases. In the first phase, eggs divided in 6 batches were immersed in T3 solutions: 0.01; 0.05; 0.1; 0.5 ppm; 1 ppm and control (no T3). After a 15-min immersion, eggs were transferred to incubators where larvae were kept up to 72 h after hatching. Larval weight, length and yolk sac volume were determined every 12 h. Sixty and 72 h after hatching, larvae exposed to 0.5 ppm T3 were significantly heavier than the others, and those exposed to 1 ppm T3 showed the lowest weight. The yolk sac absorption was not affected. In the second experimental phase, the resulting fry from the first phase were stocked into 3 boxes per treatment (5 larvae L(-1)) and fed with plankton, fish larvae and feed prepared in the hatchery (48% CP) in the first 3 days, plankton and feed from the 4th to the 10th day and only feed in the next (last) 5 days. Fry weight, length and specific growth rate were determined at 1, 5, 10 and 15 days. Survival was calculated in the last day. In the 15th day, fry length did not differ among treatments but the weight of the control group was higher. Higher survival in the T3-treated groups suggested lower predation among fry. The results allowed us to conclude that there was no expressive effect of T3 on the growth, but it improved the survival of the piracanjuba progeny.

Thyroid hormone‐induced swim bladder and eye maturation are transduced by IGF‐1 in zebrafish embryos

“…Nutritional status and growth rate variability modulate the expression patterns of genes with endocrine control actions, such as IGF‐1 receptors and binding proteins (Opazo, Valladares, & Romero, ). In this study, significant effects of T 3 were detected on growth, and enhanced survival was seen until 14 days postfertilization, in agreement with earlier reports (Landines, Sanabria, Senhorini, & Urbinati, ). Urbinati, Vasques, Senhorini, Souza, and Goncalves () attributed improved early performance of TH‐treated fish to advanced initial feeding of larvae.…”

Stimulatory effect of thyroid hormones improves larval development and reproductive performance in alligator gar (Atractosteus spatula) and spotted gar (Lepisosteus oculatus)

“…However, Kuz′mina, Levin, Vei and Rusanova () and Landines et al . () observed that growth rates in Rutilus rutilus and piracanjuba (Brycon orbignyanus) declined after T 3 exposure, despite the marked effects of T 3 effects on organ differentiation. The absence of anabolic effect on other fast‐growing warm water species has already been reported (Moon et al .…”

“…; Brown, Doroshov, Cochran & Bern ; Tagawa, Tanaka, Matsumoto & Hirano ; Ayson & Lam ; Huang, Specker & Bengtson ; Tachihara, Khalil, Ishimatsu & Tagawa ; Kang & Chang ; Lam, Sin, Gong & Lam ; Walpita, Geyten, Rurangwa & Darras ; Mendoza et al . ; Landines, Sanabria, Senhorini & Urbinati ).…”

Maternal Thyroid and Glucocorticoid Hormone Interactions in Larval Fish Development, and Their Applications in Aquaculture

“…The larvae of several freshwater fishes of South America with strong aquaculture potential have also responded favorably to experimental thyroid supplementation, including the pintado, Pseudoplatystoma coruscans and the dourado Salminus maxillosus (Landines Parra, 2003), the matrinxã, Brycon amazonicus (Urbinati et al, 2008;Leonardo et al, 2013), and the piracanjuba, Brycon orbigyanus (Landines et al, 2010).…”

“…In the piracanjuba, which has recently been listed as an endangered species (Fundação Biodiversitas, 2003), T 3 increased the survival to 15 days (Landines et al, 2010), without affecting growth rate. In another study (Dr. Leonardo and E. Urbinati, Universidade Estadual Paulista, personal communication), T 3 immersion quadrupled the hatch rate compared with controls (to 858,890 from 204,020 respectively) and hormone-supplementation also produced significant increases in larval length and weight.…”