Growth performance, sex hormone levels and maturation ability of Pla Pho (Pangasius bocourti) fed with spirulina supplementary pellet and hormone application
2009
Meng-Umphan, K. (Maejo Univ., Sansai (Thailand). Faculty of Fisheries Technology and Aquatic Resources)
The purpose of this study was to evaluate the effects of Spirulina platensis (SP) supplementary pellet feed and hormone application to Pla Pho (Pangasius bocourti) brood stock on growth sex hormone level and maturation abilities. The study was divided into three experiments. In experiment-1, the treatment 2 (3% of SP) of the Northeast population had a difference compared with the control. The average sex hormone (estradiol) levels from two collections in North and Northeast catfish fed with 3% SP were higher than in other treatments, while the average estradiol levels in March were higher than in January. Moreover, in June and July, 3 males and 2 females brood stock from 3% of SP feeding gave sperms and eggs, while only sperm were obtained from other treatments. In experiment-2, in Northeast population, estradiol was highest from catfish fed with 3% SP in April and gave more mature fish than control treatment in June and August. In experimenta l 3, the North population fish, four months later (in July), hormone was injected and implanted highest testosterone level and number of mature male and female fish were obtained in July and August. In conclusion, 3% Spirulina supplemented in pellet feed and hormone application improved growth and maturation performance of brood stock Pangasius catfish. Therefore, Spirulina supplemented feed and hormone application is recommended for P. bocourti farmers.
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