Banca de DEFESA: IGOR DE FIUZA FRANÇA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : IGOR DE FIUZA FRANÇA
DATE: 18/12/2020
TIME: 09:00
LOCAL: INSTITUTO DE ZOOTECNIA
TITLE:

Sexual Inversion of Siamese Fighthing Fish Betta Splendens Larvae Using Thermal Manipulation

KEY WORDS:

Fish-farming, ornamental, masculinization, larviculture.

PAGES: 32
BIG AREA: Ciências Agrárias
AREA: Zootecnia
SUBÁREA: Produção Animal
SUMMARY:

With regard to aquaculture, ornamental fish farming has grown exponentially
in recent years in Brazil. Among the species created, the betta, Betta splendens has great commercial importance, being easily kept in small containers, with males showing marked development of the fins, attributing a singular beauty to the species, adding greater value than compared to females. The present experiment aimed to evaluate the influence of the temperature factor during Betta splendens larviculture, and its possible effects on mortality and proportion of males and escaped. The objective was to achieve a higher ratio of males, since they are of greater commercial interest in front of the species. For this purpose, 20 adult adults were used to reproduce and display the larvae used in the experiment. Later, as newly
hatched larvae were distributed in groups of 30 animals, in beakers represented as experimental units (n = 40). These were distributed in different thermal regimes (25, 28, 30 and 33ºC), following a completely randomized design (4x10). The heat treatment was maintained until 15 DPE (days after hatching), at which time the temperature of 28ºC was restored. At the end of the thermal regime, mortality was counted and then again at 45 DPE, aiming to assess the direct and residual effect of the different tested facilities. It had a significant effect on the temperature function only at 15 DPE (P <0.001) where, as defined at 25, 28 and 30ºC, the values were lower. For the sex ratio, there was a marked difference, being those indicated at 28, 30 and 33ºC more suitable for obtaining a higher ratio of males compared to the temperature of 25ºC, which presented the worst results obtained.

BANKING MEMBERS:
Presidente - 2376201 - LEONARDO ROCHA VIDAL RAMOS
Interno - 3067308 - MATHEUS PEREIRA DOS SANTOS
Externo à Instituição - THIAGO MENDES DE FREITAS - FIPERJ