| Autor: |
Indriastuti, Cecilia Eny, Junior, Muhammad Zairin, Suprayudi, Muhammad Agus, Supriyono, Eddy, Alimuddin, Alimuddin |
| Předmět: |
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| Zdroj: |
Aquaculture Research; Aug2022, Vol. 53 Issue 12, p4437-4448, 12p |
| Abstrakt: |
This study evaluated the survival rate (SR), cannibalism, and growth performance in juveniles African catfish reared in photoperiod conditions and administered with different doses of 17β‐oestradiol (E2). A completely randomized design was used with four replicates in a 3 × 2 factorial, three photoperiods (24L:0D, 12L:12D, 0L:24D) and two levels of E2 in the diet (0 and 50 mg kg−1). Fish fed a diet containing 50 mg kg−1 of E2 and (0L:24D) significantly showed greater survival. The highest cannibalism level and type‐1 cannibalism were obtained in the photoperiod of 12L:12D and the lowest in fish fed with the inclusion of the E2. The highest non‐cannibalism mortality was obtained in animals fed with the inclusion of the E2. The highest potential of cannibalism was shown fish fed without the inclusion of E2. Fish fed a diet containing of E2 had the lowest defect. The highest SGR, LG, WG and FUE were demonstrated by the treatment (0L:24D) and in fish fed with the inclusion of the E2. Higher glucose levels were demonstrated in fish submitted to the 12L:12D photoperiod fed the diet without E2 inclusion. Administration of E2 resulted in high levels of 17β‐oestradiol in the body of the catfish under the 24L:0D and 0L:24D. Testosterone in the body of juvenile catfish decreased due to the administration of E2 at the 0L:24D condition. Juvenile catfish reared at high densities under the 0L:24D photoperiod and addition 50 mg kg−1 of E2 showed the lowest cannibalism level and greater survival and growth. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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