Effects of dietary supplementation with benthic diatom Amphora coffeaeformis on blood biochemistry, steroid hormone levels and seed production efficiency of Nile tilapia Oreochromis niloticus broodstock
aquaculture; feed additive; follicle‐stimulating hormone; hormone‐promoters; luteinizing hormone; progesterone, prolactin; testosterone, progesterone
Aquafeed additive quality and quantity remain pivotal factors that constrain the
sustainability and progress of aquaculture feed development. This study investigates
the impact of incorporating the benthic diatom Amphora coffeaeformis into the diet
of Nile tilapia (Oreochromis niloticus) broodstock, on the blood biochemistry, steroid
hormone (SH) levels and seed production efficiency. Broodstock females displaying
mature ovary indications were initially combined with males at a ratio of three
females to one male. A total of 384 adult Nile tilapia (288 females and 96 males)
were used, with 32 fish (24 females and eight males) assigned to each of 12 concrete
tanks (8 m³; 2m× 4m× 1 m), with three replicate tanks for each dietary treatment,
throughout a 14‐day spawning cycle until egg harvest. Fish were fed one of four
different dietary treatments: AM0% (control diet), and AM2%, AM4% and AM6%
enriched with the diatom A. coffeaeformis at levels of 20, 40 and 60 g/kg of diet
respectively. At the trial's conclusion, total protein, albumin, triglyceride and
creatinine), SHs (follicle‐stimulating hormone, luteinizing hormone, free testosterone,
total testosterone, progesterone and prolactin) and seeds production efficiency
of Nile tilapia improved significantly (p < 0.05) in alignment with the increment of
A. coffeaeformis supplementation. The findings propose that including A. coffeaeformis
at levels ranging from 4% to 6% could be effectively employed as a feed
additive during the Nile tilapia broodstock's spawning season.
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