Performance and carcass traits in the diallel crossing of pacu and tambaqui

Abstract

With the purpose of evaluating the changes and the degree of heterosis on performance and carcass traits of fish from the diallel crossing between Pacu and Tambaqui, four genetic groups were generated through hormonal induction: pacu, tambaqui, tambacu and paqui. For 196 days, 400 juveniles of each genetic group were stocked in a pond divided into four parts of equal size, one for each group. At the end of this period, when the fish weighed on average 1024 g (±115.52 g), 20 specimens of each genetic group were sampled, weighed, measured: head length; standard length; body height; and width; and also processed resulting in following body yield: viscera; carcass; head; fillet; rib; residue and skin yields. There was positive heterosis for body weight, viscera and skin yield and head measures and negative heterosis for carcass and filet yield and body width, indicating that the hybrids have better performance on weight gain, but are inferior in relation to the carcass conformation

Yield, flesh parameters, and proximate and fatty acid composition in muscle tissue of wild and cultured vieja colorada (Cichlasoma festae) in tropical Ecuadorian river

“…(Oreochromis sp.) (33%) and channel catfish (Ictalurus punctatus) (>38%) and similar to the 32% reported by Neto et al (2012) in Pacu (Colossoma bidens) and Tambaqui (Colossoma macropomum) fish. Based on production systems, the flesh yield obtained was higher in cultured fish than wild fish (Table 1) and similar than those presented by Sulieman & James (2011) for Nile Tilapia (Oreochromis niloticus) who reported values higher in farmed fish than in wild fish (37.1% and 32.2 % respectively).…”

General and specific combining ability in Serrasalmidae

“…() in pacu and tambaqui. Bodily yields have low or zero correlation with performance, morphometric and body component traits in round fish (Reis Neto, Serafini, et al., ) and tilapia (Melo et al., ), which explains why the GCA ranking for bodily yields is different from that for other traits analysed. These results indicate that for the studied traits, apart from bodily yield, tambaqui has a better response to selection and can also best transmit its characters to descendants, showing the potential of using this species in breeding programmes.…”

“…Reis Neto, Serafini, et al. () evaluated genetic groups generated from crossings between pacu and tambaqui. The authors found positive heterosis (superiority of hybrids) for body weight and for most morphometric measures, with tambacu (♀tambaqui × ♂Pacu) being the genetic group with the best performance.…”

“…In the absence of Serrasalmidae breeding programmes, hybridization has been carried out in an ad hoc manner in fish farms in order to explore heterosis for performance traits and carcass quality (Hashimoto et al., ; Mourad et al., ; Reis Neto, Serafini, et al., ).…”

Marcadores moleculares e a caracterização dos recursos genéticos de peixes: desenvolvimento sustentável da aquicultura e da pesca de espécies nativas de água doce no Brasil

“…O que se tem feito é a prática de produção de híbridos interespecíficos para obtenção rápida de respostas a condições de cultivo. (REIS-NETO et al, 2012).…”