Banca de DEFESA: JOCINEI DOS SANTOS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : JOCINEI DOS SANTOS
DATE: 13/03/2024
TIME: 14:00
LOCAL: meet.google.com/ntf-oaeu-cfj
TITLE:

GROWTH OF TAMBAQUI (Colossoma macropomum) IN A WATER RECIRCULATION SYSTEM ASSOCIATED WITH THE CULTIVATION OF JAMBU (ACMELLA OLERACEA) FOR AMMONIA REDUCTION

KEY WORDS:

Colossoma macropomum, aquaponics, aquaculture, ammonia, Acmella oleracea

PAGES: 51
BIG AREA: Ciências Biológicas
AREA: Fisiologia
SUMMARY:

The tambaqui (Colossoma macropomum) is the second-largest freshwater fish in South America. The production of tambaqui is quite widespread, mainly in the North, Northeast and Central-West regions of Brazil due to its rusticity and easy adaptation to extreme conditions of water quality. The duration of the production cycle, which varies from eight to 12 months, depends on storage density, type of feed, and water quality. Vegetable cultivation associated with fish farming makes it possible to reuse water for vegetable production and remove excess nutrients from fish production. Water quality in aquaculture is characterized by the dynamic balance of all physical, chemical, and biological variables, which enable the cultivation of aquatic organisms, minimizing environmental impacts and enhancing production. This work aimed to produce tambaqui associated with the cultivation of jambu (Acmella oleracea), as a tool for absorbing and reducing ammonia. Four elevated tanks were built, circular in shape, with a capacity of 20 cubic meters of water. Each tank received 500 tambaquis fry that were fed with a diet based on commercial feed with 32% protein. Two groups were used with two replications, two experimental (with association with jambu) and two controls (without association). Water quality parameters (pH, oxygen, and temperature) were monitored manually with portable devices and nitrogen compounds were monitored weekly by photometry. Fish biometrics were carried out biweekly between May and August 2022, totaling 700 records. The association with jambu was not sufficient to remove nutrients from wastewater from production systems, mainly ammonia (average of 0.65 ± 1.15 mg/l in tanks without jambu and 0.67 ± 0.63 mg/l in tanks with jambu) that did not differ between tanks (t = 0.056; df = 42; p = 0.955). Thus, the fish in the experimental group achieved a lower average weight gain of 72.7 ± 33.01 g compared to the fish in the control group, 97.85 ± 52.11 g during the experiment period (t = 7.608; df = 698; p<0.05). Therefore, it is recommended that studies be carried out with larger boxes of jambu and other native species in consortium with aquaculture to evaluate the removal of ammonia and the growth of fish in production.

 

COMMITTEE MEMBERS:
Externa à Instituição - FERNANDA MAYARA NOGUEIRA
Interno - 2383549 - GUSTAVO DA SILVA CLAUDIANO
Presidente - 2394508 - GUSTAVO HALLWASS
Externa à Instituição - PAULA EVELYN RUBIRA PEREYRA - UFRGS
Externa ao Programa - 2391885 - PRISCILA SAIKOSKI MIORANDO - null