Dissertações

URI Permanente para esta coleção

https://repositorio.uenp.edu.br/handle/123456789/227

Navegar

Navegando Dissertações por Assunto "14. Vida na água"

Agora exibindo 1 - 2 de 2
  • Imagem de Miniatura
    Dissertação
    Acesso aberto (Open Access)
    Potencial do resíduo de filetagem da tilápia como ingrediente proteico para rações
    (Universidade Estadual do Norte do Paraná, 2020-02-28) Silva, Alessandra Moreira da; Porto, Petrônio Pinheiro; https://orcid.org/0000-0002-2999-7612; http://lattes.cnpq.br/1751366795715746; Porto, Petrônio Pinheiro; https://orcid.org/0000-0002-2999-7612; http://lattes.cnpq.br/1751366795715746; Grecco, Fabíola Cristine de Almeida Rego; https://orcid.org/0000-0003-4516-7632; http://lattes.cnpq.br/7872941464229041; Tamehiro, Claudia Yurika; https://orcid.org/0000-0002-1544-2130; http://lattes.cnpq.br/3001407216866732; Ferreira, Cláudia Yumi Matsubara Rodrigues; http://lattes.cnpq.br/4158802579096378; Nubiato, Keni Eduardo Zanoni; https://orcid.org/0000-0001-8957-5457; http://lattes.cnpq.br/7558533573494842
    The objective of this work was to evaluate the use of tilapia fillet residue (RFT) in substitution to soybean in the manufacture of extruded protein ingredient, where bromatological, microbiological and stability aspects of the final product stored after processing were used as parameters. Tilapia Fillet Residue (RFT) was subjected to cooking for approximately 20 hours and through a skimmer was transferred to a concrete mixer where a premix was made with cornmeal (FM) which was necessary for grinding in the mill used on the property, this proportion being 63.62% of cornmeal and 36.38% of Tilapia Fillet Residue (RFT) in dry matter. The pre-mixture passed through an extruder press, in which it was necessary to add Soybean Grain (SG) for processing due to the mechanism of the press. In this way, it was possible to stipulate the following treatments: T1 (RFT 2.8): 4.89% FM; 2.80% RFT and 92.31% SG and T2 (RFT 5.8): 10% FM; 5.8% RFT and 84.2% SG, based on dry matter, where four days of openings (0; 7; 14; 21 days) after obtaining the final product were evaluated. Subsequently, evaluations of the parameters mentioned on days 0; 7; 14; 21; 28; 35; 60; 90; 120; 150 and 180 days after making the treatments were carried out. Within the conditions adopted for both treatments, the acidity and peroxidation index as well as the rancification test did not show significant colorimetric changes; the microbiological changes were also null for both treatments. The contents of dry matter, crude protein and ether extract were higher than 89.0%, 43.0% and 9.0%, respectively, which, by means of the processing carried out, did not present relevant changes in their chemical composition up to 35 days. It was concluded that the protein ingredients using the RFT showed potential for use in animal nutrition.
  • Imagem de Miniatura
    Dissertação
    Acesso aberto (Open Access)
    Suplementação hídrica de vitaminas do complexo B, vitamina C, potássio e zinco: impactos no desempenho e na qualidade da água de alevinos de Oreochromis niloticus
    (Universidade Estadual do Norte do Paraná, 2026) Carezia, Júlia Navarro Fini; Silva, Marcos Augusto Alves da; https://orcid.org/0000-0002-5570-8677; http://lattes.cnpq.br/4973981237909142; Silva, Marcos Augusto Alves da; https://orcid.org/0000-0002-5570-8677; http://lattes.cnpq.br/4973981237909142; Porto, Petrônio Pinheiro; https://orcid.org/0000-0002-2999-7612; http://lattes.cnpq.br/1751366795715746; Souza, João Ricardo Malheiros de; https://orcid.org/0000-0002-3211-8148; http://lattes.cnpq.br/3868528104536319; Salvador, Rogério; http://lattes.cnpq.br/8305553541747517; Souza, Felipe Pinheiro de; https://orcid.org/0000-0003-3436-4147; http://lattes.cnpq.br/1642955376796651
    Brazilian agribusiness plays a fundamental role in the country’s economy, including aquaculture, which has shown significant growth, especially in the production of tilapia (Oreochromis niloticus). This species stands out due to its high adaptability and rapid production cycle, with the state of Paraná accounting for approximately 36% of national production. Among the main factors influencing productivity are water quality management and the improvement of zootechnical indices. In this context, the present study aimed to evaluate the use of a formulated product based on vitamins and minerals, applied directly to the culture water, on the productive performance of fingerlings, with the goal of improving weight gain and growth without compromising water quality. The experiment was conducted in a completely randomized design, with three treatments (control, product application once a week, and twice a week), three replicates, and 57 experimental units per treatment. Nine aquaria with a capacity of 113 L were used, each containing 19 fish. Throughout the experimental period, water quality parameters (dissolved oxygen, temperature, pH, ammonia, nitrite, and hardness) were monitored and remained within appropriate ranges, with no differences observed among treatments. Regarding zootechnical performance, a substantial increase in biomass was observed in all treatments. The initial mean weight ranged from 7.80 to 7.89 g, while final values were 33.57 g, 36.28 g, and 35.77 g for the control, weekly application, and twice-weekly application treatments, respectively. The mean weight gain was 26.29 ± 12.27 g, 28.95 ± 15.18 g, and 28.48 ± 12.37 g, with no statistically significant differences (p > 0.05), although supplemented treatments showed a trend toward higher gain. Length growth was also continuous, with initial values ranging from 7.32 to 7.53 cm and final values from 11.69 to 12.24 cm, resulting in mean increases of 4.60 ± 1.65 cm, 4.89 ± 1.91 cm, and 4.74 ± 1.57 cm, respectively, also without significant differences. Despite the absence of statistically significant effects, the results indicate a trend toward improvement in zootechnical indices with supplementation. However, longer experimental periods and possible adjustments to the experimental design are necessary to confirm its effects on productive performance.