Banca de DEFESA: YOLANDA DE MACEDO DANTAS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : YOLANDA DE MACEDO DANTAS
DATE: 05/09/2021
TIME: 08:30
LOCAL: Link: meet.google.com/cmr-rhec-eeq
TITLE:

Contribution of natural and artificial sources to the growth of marine shrimp Litopenaeus vannamei in low salinity

KEY WORDS:

Pacific white shrimp; ¹⁵N; ¹³C; MixSIAR; Nutrition; Shrimp Farming; Oligohaline water

PAGES: 34
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUMMARY:

The natural productivity of a pond plays an important role in shrimp nutrition and in keeping the environmental quality during cultivation. Planktonic and benthic organisms as well as detritus are pointed out as the main nutritional sources for shrimp. This study evaluated the relative contribution of natural feed sources and commercial feeds to the growth of shrimp Litopenaeus vannamei on semi-intensive farms with low salinity water. The stable isotope analysis of carbon and nitrogen was used as a method to trace the sources in the animal's muscle tissue. The relative contributions were estimated through a mixing model using the isotopic signature of samples of shrimp, commercial feed, sediment organic matter, and seston, in addition to the discriminant factors of the sources. The results indicate that there was a pattern of increment in the contribution of the natural feed sources between the cultivation phases I (30 days) and II (60 days), but the main source for the development of the shrimp was the commercial feed. The natural sources had their greatest contribution (46.8%) in phase II under low stocking densities (Farm A) and the smallest contribution (26.9%) in phase II under high stocking density (Farm B). The difference in the relative contributions of the sources is also associated with nutritional characteristics of the commercial feed, the availability of natural food, and the environmental conditions. Increasing natural feed sources contributes to more sustainable low-salinity semi-intensive shrimp farming practices.

BANKING MEMBERS:
Interna - 1279472 - ELIANE MARINHO SORIANO
Externa à Instituição - EVANILDE BENEDITO - UEM
Presidente - 2412921 - JULIANA DEO DIAS