Banca de DEFESA: BEATRIZ ANDRADE NÓBREGA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : BEATRIZ ANDRADE NÓBREGA
DATA : 30/07/2019
HORA: 10:00
LOCAL: Presidente Médici
TÍTULO:

Classification system of fish species in the Western Amazon

PALAVRAS-CHAVES:

Yield. Tambaqui. Pirarucu. Processing. Industry

PÁGINAS: 44
GRANDE ÁREA: Ciências Agrárias
ÁREA: Recursos Pesqueiros e Engenharia de Pesca
SUBÁREA: Engenharia de Pesca
RESUMO:

With emphasis on fish farming, Rondônia leads the national ranking of native fish production. The implementation of a fish classification system will standardize all production, seeking animals that generate better yields to the refrigerator, quality to the final consumer and the least amount of waste to the environment, showing an economic, environmental and social need. The objective of this study was to define a classification system of tambaqui and pirarucu, due to the great importance of the species in the Western Amazon. The study was carried out in the two fish slaughterhouses with the highest processing volume in the state, between 2017 and 2019. The commercial cuts yield and tambaqui morphometric measurements were evaluated in five body weight classes: class 1 - below 1.2 kg; class 2 - from 1.21 to 1.8 kg; class 3 - from 1.81 to 2.3 kg; class 4 - from 2.31 to 3.5 kg and class 5 - above 3.5 kg, and from pirarucu in seven classes of body weight: class 1 - below 8 kg; class 2 - from 8.1 to 11 kg; class 3 - from 11.1 to 14 kg; class 4 - from 14.1 to 18 kg; class 5 - from 18.1 to 23 kg; class 6 - from 23.1 to 32 kg and class 7 - above 32 kg. The Kruskal-Wallis test (α = 0.05) was used to compare the means of income among the weight classes. To verify the correlation between morphometric measures and yields, the Spearman correlation coefficient (α = 0.05) was tested. In order to obtain the profit in each of the classes due to the cut produced, a simple economic analysis was performed, considering only the purchase cost of the fish. The yield of fillet, rack and tambaqui post were higher in classes 3 and 4, while the yield of residues was the lowest. The economic analysis showed that the production of posta in class 5 was impracticable. Measurements CT and CP had a high positive correlation with post yield in all classes, as well as CirM and CirCau in classes 1, 2 and 4, and could be used to determine the yield of this cut. For the pirarucu, classes 1 to 6 presented higher yields of manta, while 1 and 2, lower production of residues. The yield of mignon and fillet was higher in grades 4, 5 and 6, while loin and residue yield did not differ between grades. The economic analysis does not recommend taking pirarucu production above 32 kg. The CirM measure has a moderate positive correlation with the manta yield and can be used to determine the yield of this cut. All data were included in a web platform, composing the classification system, to help producers and agroindustries in decision making.

MEMBROS DA BANCA:
Presidente - 1810533 - JUCILENE CAVALI
Interno - 1833024 - MARLOS OLIVEIRA PORTO
Externo ao Programa - 3066115 - MARCONDES AGOSTINHO GONZAGA JUNIOR
Externo à Instituição - RILKE TADEU FONSECA DE FREITAS - UFLA