Alternating Nile tilapia (Oreochromis niloticus) and silver catfish (Rhamdia quelen) farming in recirculation system: A possibility for aquaculture in Southern Brazil

Abstract: The objective of this work was to evaluate a Bayesian model-based clustering method to identify the strains of Nile tilapia (Oreochromis niloticus) individuals from fish farms in Southern Brazil. Assignment methods using nine microsatellite loci were applied to differentiate individuals of five reference strains (GIFT, GST, Nilótica, Chitralada, and Saint Peter) and to identify individuals of unknown strains from fish farms near the Itaipu reservoir and in the Uruguay River basin. The procedure assigned the correct strain in more than 90% of the cases and was also able to detect hybrids between strains. The obtained results showed that several fish farms in Southern Brazil cultivate more than one tilapia strain and even interstrain hybrids. The proposed methodology is a reliable tool for the identification of the strain origin of Nile tilapia individuals.

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Pterygoplichthys spp. (Siluriformes: Loricariidae) meal is suitable for the culture of Nile tilapia Oreochromis niloticus (Cichlidae) juveniles

Ciência Rural ◽

10.1590/0103-8478cr20200801 ◽

2022 ◽

Vol 52 (1) ◽

Author(s):

Martha Patricia Cano-Salgado ◽

Carlos Alfonso Álvarez-González ◽

Rafael Martínez-García ◽

Emyr Saul Peña-Marin ◽

Uriel Rodríguez-Estrada ◽

...

Keyword(s):

Invasive Species ◽

Chemical Composition ◽

Oreochromis Niloticus ◽

Nile Tilapia ◽

Survival Rates ◽

Optimal Level ◽

Apparent Digestibility ◽

Nile Tilapia Oreochromis Niloticus ◽

Recirculation System

ABSTRACT: We search for positive utility impact on the invasive species Pterygoplichthys spp. The optimal level of replacement of sardine meal (SM) by Pterygoplichthys spp. meal (PLM) in practical feeds for fry of Nile tilapia (Oreochromis niloticus) was evaluated. We evaluated six experimental diets: 50% PLM-50% SM, 60% PLM-40% SM, 70% PLM-30% SM, 80% PLM-20% SM, 90% PLM-10% SM and 100% PLM-0% SM. In a recirculation system, 270 sex-reversed tilapia fry were used (0.7 ± 0.1 g). Diets were administered in triplicate and the experiment lasted 56 days with sampling every 14 days. There were no statistical differences in growth. At the end of the experiment, the SGR, ADG, CF, WG, DFI, FCR and PER were determined without significant differences (P > 0.05) between treatments, but there was a tendency that could indicated higher WG and PER in the 90% PLM-10% SM treatment (93.56 ± 0.43% and 8.44 ± 1.18 g, respectively). All survival rates were higher than 90% with no significant differences. Additionally, there were no statistical differences in the chemical composition of the whole fish, while apparent digestibility coefficients of protein (81-90%) and lipids (87-93%) also showed no significant differences. We concluded that 100% PLM can replace 100% SM in feeding fry of O. niloticus without affecting their survival, growth or chemical composition or the apparent digestibility of nutrients.

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Successful xenogeneic germ cell transplantation from Jundia catfish (Rhamdia quelen) into adult Nile tilapia (Oreochromis niloticus) testes

General and Comparative Endocrinology ◽

10.1016/j.ygcen.2016.03.012 ◽

2016 ◽

Vol 230-231 ◽

pp. 48-56 ◽

Cited By ~ 21

Author(s):

M.A. Silva ◽

G.M.J. Costa ◽

S.M.S.N. Lacerda ◽

P.F.P. Brandão-Dias ◽

E. Kalapothakis ◽

...

Keyword(s):

Germ Cell ◽

Cell Transplantation ◽

Oreochromis Niloticus ◽

Nile Tilapia ◽

Germ Cell Transplantation ◽

Nile Tilapia Oreochromis Niloticus ◽

Rhamdia Quelen

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Complete Genome Sequence of Streptococcus iniae UEL-Si1, Isolated in Diseased Nile Tilapia (Oreochromis niloticus) from Northern Paraná, Southern Brazil

Genome Announcements ◽

10.1128/genomea.01458-16 ◽

2017 ◽

Vol 5 (2) ◽

Author(s):

Laurival A. Vilas-Boas ◽

Selwyn A. Headley ◽

Kátia B. Gonçalves ◽

Josiane A. Scarpassa ◽

Lucienne G. Pretto-Giordano

Keyword(s):

Infectious Disease ◽

Complete Genome Sequence ◽

Oreochromis Niloticus ◽

Complete Genome ◽

Nile Tilapia ◽

Streptococcus Iniae ◽

Southern Brazil ◽

Content Type ◽

Nile Tilapia Oreochromis Niloticus ◽

Disease Agent

ABSTRACT The Streptococcus iniae UEL-Si1 strain was isolated from diseased Nile tilapia within the Paranapanema River Basin, Northern Paraná, Brazil. This is an emerging infectious disease agent of fish from Brazil, and sequencing of the complete genome is fundamental to understanding aspects relative to pathogenesis, infection, epidemiology, and immunity.

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